HomeMy WebLinkAboutSUS61t 6i 1M Interior
Anchorage-Fairbanks Transmission lntertie
ELECTRICAL ENVIRONMENTAL EFFECTS REPORT
INCLUDING
RADIO AND TELEVISION PRECONSTRUCTION MEASUREMENTS
AND
COMMUNICATIONS TOWER SURVEY
ENGINEERING REPORT R-2394
June 1982
,__ __ ALASKA POWER AUTHORITY __ _.~
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COMMONWEALTH ASSOCIATES INC ., 209 E. Washington Avenue, Jackson, Ml 49201/Tel. 517 788-3000
June 25, 1982
Mr. David R. Eberle
Project Manager
Alasks Power Authority
334 West 5th Avenue
Anchorage, AK 99501
Dear Mr. Eberle:
Subject: ANCHORAGE/FAIRBANKS INTERTIE
ELECTRICAL ENVIRONMENTAL EFFECTS REPORT
Enclosed are 22 copies of 11 Electrical Environmental Report 11 (R-2394).
The 22 copies supplied are in accordance with Mr. David Wozniak's
letter of December 22, 1981, Item 1, and are for your distribution.
The report as submitted is final and includes sections entitled,
11 Electrical Environmental Effects Report;11 Appendix A, 11 Results of
Preconstruction Measurements of Radio and TV Signal Strengths and
Radio Frequency Noise;11 and Appendix B, 11 Communication Tower Survey 11
•
These three sections of the report were orginally submitted in the
first draft as individual reports but are submitted together in the
final report for convenience.
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Enclosures
Gilbert/Commonwealth family of Companies
Reading, PA Jackson , Ml New York, NY Rio de Janeiro, Brazi l
ALASKA POWER AUTHORITY
ANCHORAGE -FAIRBANKS TRANSMISSION INTERTIE
ELECTRICAL ENVIRONMENTAL EFFECTS REPORT
INCLUDING
RADIO AND TELEVISION PRECONSTRUCTION MEASUREMENTS
APPENDIX A
AND
COMMUNICATIONS TOWER SURVEY
APPENDIX B
Engineering Report R-2394
prepared by:
J. F. Torri, P.E.
J. T. Hancock, P.E.
at the offices of
Commonwealth Associates Inc.
209 East Washington Avenue
Jackson, Michigan 49201
June 4, 1982
Approved by:
..!L'l 2 0 1982
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ELECTRICAL ENVIRONMENTAL EFFECTS REPORT
TABLE OF CONTENTS
. . . . . . . . . . . . . . . . . SCOPE • • •
CONCLUSIONS • . . . . . . . . . . . . . . . . . . .
RECOMMENDATIONS . . . . . . . . . . . . . . . . . .
TRANSMISSION LINE CONFIGURATION • . . . . . . . . .
INTERTIE OPERATING VOLTAGES • • • . . . . . . . . .
HEAVY RAIN AND WET CONDUCTOR CONDITIONS DEFINED • . . .
LEVELS OF OZONE CONCENTRATION AND THE QUALITY OF AIR. •
AUDIBLE NOISE • . . . . . . . . . . . . . . . .
RADIO INTERFERENCE. . . . . . . . . . . . . . . . .
Radio Frequency Noise Calculations • . . . . . . .
Hardware Radio Frequency Noise • • • . . . .
Page
1
2
3
3
4
4
4
5
7
7
8
Rpdio Station Signal Strength Measurements • • • • 8
Estimated Radio Reception Quality. • • • • • • • • 8
CB Radio Interference ••
TELEVISION INTERFERENCE •
ELECTRIC FIELDS • • • •
. . . . . . .
. . . . . . . . .
. . .
. . • • 10
• • • • 10
• • 11
Induced Currents
MAGNETIC FIELDS • •
. . . . . . . . . • • • 12
BIOLOGICAL EFFECTS ••
ELECTRICAL SAFETY • •
Physical Contact •
Vehicles
. . . . . . . . . . . .
. .
. . .
i
• • 13
. . . • 13
• 14
• 14
. . . • 14
TABLE OF CONTENTS (CONT)
REFERENCES.
TABLES. • • •
APPENDIX A -RADIO AND TV PRECONSTRUCTION
MEASUREMENTS
APPENDIX B -COMMUNICATION TOVJER SURVEY
ii
15
17
ALASKA POWER AUTHORITY
ANCHORAGE-FAIRBANKS TRANSMISSION INTERTIE
ELECTRICAL ENVIRONMENTAL EFFECTS REPORT
SCOPE
This report discusses the electrical environmental effects
of three 345 KV transmission lines associated with the
Alaska Power Authority's intertie between Willow and Healy,
Alaska. This report presents the results of calculations,
preconstruction field measurements and a communication tower
survey. The following subjects are discussed:
Ozone generated by transmission line corona
Audible noise generated by transmission line corona
Broadcast and citizen band (CB) radio interference
Television interference
Electric and Magnetic Field Strength
Induced Currents and Safety Aspects
Biological Effects and Electrical Safety
The report is based on an analysis of three single circuit
345 kV lines on a common 400 foot wide right-of-way as
described in a following section of this report. To estimate
the effects of the transmission lines, an operating voltage
of 362.5 kV was used.
Preconstruction measurements taken in the study area between
Willow and Healy determined the radio and television signal
strengths and ambient radio frequency noise levels. The
results of these measurements document the preconstruction
conditions and are presented in Appendix A.
A survey of radio communications towers licensed to business
and governmental agencies in the study area was conducted to
identify locations where the metallic structures of the
intertie may interfere with communication signals. The
results of this survey are presented in Appendix B.
-1-
CONCLUSIONS
The conclusions below are based on studies conducted for
operation of the intertie at 362.5 kV. Initially, the
intertie will be operated at a lower voltage of 138 kV.
During the period of operation at 138 kV, all electrical
environmental effects will have much lower levels and will
be, for practical purposes, negligible.
No measurable levels of ozone will be generated by the
intertie transmission lines.
The low levels of audible noise produced by the intertie will
not result in significant noise problems.
No interference to FM radio reception caused by rf noise from
the intertie is expected.
No interference to AM radio reception from the intertie is
expected at distances greater than 1000 feet from the center-
line of the right-of-way.
No interference to TV reception is expected from the intertie
in locations where present TV reception is good.
Electric and magnetic field strengths produced by the intertie
at ground level will be harmless.
The minimum phase-to-ground clearance of 30 feet is sufficient
to satisfy the 8 kV/meter design criterion for maximum electric
field strength on the right-of-way.
The 30 foot phase-to-ground clearance is sufficient to satisfy
the National Electrical Safety Code five milliampere induced
current criterion for large vehicles (13.5' H, 8.5' W, 70' L)
on highways and major roads crossing perpendicularly beneath
the intertie.
No shock hazards from induced currents from the intertie are
expected.
-2-
RECOMMENDATIONS
As a result of this analysis, the following recommendations
are made.
In areas where use of large (tall) equipment is
operated under the lines, adequate clearance should
be maintained by the operators of the equipment to
insure that minimum NESC clearances are attained.
Metallic fences and/or large stationary metallic
objects permanently located inside the right-of-way
should be grounded to prevent possible nuisance
shocks.
Between Willow and Curry, a minimum separation of
1000 feet is recommended between the centerline
of the intertie right-of-way and long parallels
to the Parks Highway and to residences to preserve
the existing quality of AM radio reception. Between
Curry and Garner (south of Healy), the one AM radio
signal able to be measured has a Grade D quality of
reception.
The recommended minimum separation between the edge
of the right-of-way and the commercial and governmental
communications towers in the study area are presented
in Table B-3 of Appendix B.
TRANSMISSION LINE CONFIGURATION
The analysis is based on three single-circuit 345 kV trans-
mission lines on a common 400 foot wide right-of-way. one
structure is located on the centerline of the right-of-way,
and the other two structures are separated from the center
structure by a distance of 115 feet. The structure is a
guyed steel pole x. The minimum phase conductor height is
30 feet and the average conductor height is 44.3 feet based
on a suspension height of 73 feet and a sag of 43 feet. A
bundle of two 1.165 inch diameter wires comprise each phase
conductor which are spaced 33 feet apart. The shield wires
are 3/8 inch extra high strength steel and have a minimum
height of 76.7 feet. The two shield wires on each structure
are spaced 52 feet apart.
-3-
INTERTIE OPERATING VOLTAGES
The nominal voltage of the intertie is 345 kV. The operating
voltages are expected to range from a minimum of 310.5 kV ~o
a maximum of 362.5 kV [1]. Calculations of the electrical
environmental effects were made for the maximum operating voltage.
HEAVY RAIN AND WET CONDUCTOR CONDITIONS DEFINED
In calculating and evaluating audible noise and radio frequency
noise from the transmission lines, it is necessary to define
the terms "wet conductor" and "heavy rain." The wet conductor
(also called "after rain") condition represents a natural
condition of very light rain, drizzle or dense fog. The
conductor is saturated with pendant water drops and the concen-
tration of moisture in the air is just sufficient to maintain
an equilibrium between the loss and replacement of water drops
[ 2] •
The audible noise level during wet conductor conditions
represents the maximum noise in fog, the noise in light rain
and the noise immediately after rain [2] • For radio noise
the wet conductor condition represents the average (50 per-
cent point) radio noise level for the total foul-weather
period. Foul-weather includes all periods of rain, wet snow,
and "wetting fog" [2].
For audible noise purposes, heavy rain is defined as a
laboratory condition of artificial rain of intensity ranging
from 0.7 to 3.5 inches per hour which gives reproducible
results and simulates a special situation which occurs in
nature for short periods of time [2]. For radio noise pur-
poses, heavy rain is defined as a rainfall rate of 0.47 inch
per hour or greater. For 99 percent of the total foul-weather
period, the radio noise generated by corona can be expected to
be below the heavy rain value [2]. In a general context, heavy
rain may be considered as a rainfall rate of 0.5 inches per
hour or greater.
LEVELS OF OZONE CONCENTRATION AND THE QUALITY OF AIR
Field measurements, laboratory studies, and analytical
predictions [3, 4, 5], show that existing high voltage trans-
mission lines, including 345 kV lines, produce no significant
levels of ozone.
-4-
Actual field measurements, have shown that commercial trans-
mission lines, including 345 kV, 500 kV and 765 kV lines, do
not generate ozone levels which are measurable above the
ambient levels. The results of these studies clearly demon-
strate that ozone levels produced by transmission lines are
significantly below the maximum concentration level (0.12
parts per million) recommended by the Environmental Protection
Agency [6].
It is concluded that the line design used will produce no
significant levels of ozone.
AUDIBLE NOISE
corona generated audible noise from ac transmission lines is
greatest during heavy rain when corona activity is greatest.
During these periods, the background audible noise level also
increases and public activity generally decreases. These
two factors tend to offset the effect of increased noise
during heavy rain.
When the conductor is wet following a heavy rain or during
light rain, fog or snow, lower levels of audible noise are
produced by transmission line corona. However, since back-
ground audible noise levels are also lower during light
rain, fog, or snow and public activity is more nearly normal,
the "wet conductor" condition is generally used as the audible
noise design condition for ac transmission lines.
Audible noise during fair weather is highly variable and is
dependent on the conductor surface condition and the number
of dust particles or insects on the conductors. The audible
noise from the Anchorage-Fairbanks Transmission Intertie
during fair weather will probably be inaudible to a person
with normal hearing standing under or near the line. Some-
times a faint "crackling" noise may be heard if one listens
for this noise. Many factors will determine whether a
particular person will be aware of this noise. If a light
wind is blowing, air turbulence around the ears in usually
more than loud enough to obscure fair weather audible noise.
Natural noise sources would also tend to mask the fair
weather noise from the lines. A person having his attention
focused on some activity or engaged in conversation would
probably not be aware of fair weather audible noise from the
lines unless he would specifically listen for it.
-5-
Audible noise levels for the intertie have been calculated
using methods developed at Project UHV [2]. The calculated
maximum audible noise level and the calculated noise level
at the edge of right-of-way (EROW) are given in Table 1 for
heavy rain and wet conductor conditions. Estimated fair
weather levels (inaudible) are also given.
Bonneville Power Administration developed a general guideline
[7] based upon public response to ac transmission line
audible noise. The guideline indicates that numerous com-
plaints can be expected if the line noise exceeds approxi-
mately 58.5 dBA and that few complaints should be expected
if audible noise is less than 52.5 dBA. The calculated
noise levels for the subject line indicate that few complaints
should result from transmission line audible noise and then
only if conditions of heavy rain and maximum system voltage
occur simultaneously.
The EPA Levels Document [8] discusses the effects of various
day-night average sound levels (Ld ) in terms of interference
with speech communication, commun1~y reaction, annoyance and
attitude toward the area. A summary of the expected effects
of an outdoor day-night average sound level of 55 dB, as
developed by the Committee on Hearing, Bioacoustics and
Biomechanics (CHABA) [9], is shown in Table 2 together with
the defining equation for Ld • Effects for Ldn levels below
55 dB have not been develope9.
For purposes of comparison, the 44 dBA wet conductor audible
noise level (at the edge of the right-of-way; see Table 1),
excluding background noise, may be converted to an equivalent
Ld • To do this, it must be assumed that the conductors
w1£1 remain wet (producing a 44 dBA noise level) for a 24
hour period. This is a very conservative assumption. The
resulting equivalent day-night average sound level (Ld ) is
50.4 dB. Since this level is well below 55 dB, the et~ects
of transmission line noise will be much smaller than those
given in Table 2.
A comparison of transmission line audible noise levels can
be made with other common noise sources given in Table 3
[10]. Such a comparison illustrates that the intertie will
not significantly increase the noise level to which people
are normally exposed. Therefore, no problems are expected
as a result of the low levels of audible noise produced by
the intertie.
-6-
RADIO INTERFERENCE
Radio interference from ac transmission lines may result
from corona generated radio frequency (rf) noise. The
severity of this interference depends on the strength of the
desired radio signal and the intensity of the transmission
line rf noise. This assumes that the transmission line rf
noise exceeds the ambient rf noise. The magnitude of
corona generated rf noise decreases with increasing frequency
and is very low at frequencies above 10 MHz. Interference
is generally noticed on AM broadcast-band radios located
near a transmission line such as in an automobile passing
under a line. FM radios generally do not experience inter-
ference from corona generated radio noise for two reasons:
the magnitude of radio noise is quite small in the FM broad-
cast band (88-108 MHz) and the interference rejection proper-
ties inherent in FM radio systems make them virtually immune
to static type disturbances. No interference to FM radio
reception caused by rf noise from the intertie is expected.
The degree of interference to AM broadcast reception caused
by corona generated radio noise is characterized in terms of
the signal-to-noise ratio (SNR). The SNR is more generally
expressed in terms of the difference (in decibels) between
the radio station signal strength and the radio frequency
noise, both expressed in decibels based on a one microvolt
per meter reference level (dBu). The quality of radio
reception expressed in terms of SNR is defined in Appendix
A, page A-5.
Signal strengths of AM broadcast stations and ambient rf
noise levels have been measured at eleven sites in the study
area between Willow and Healy (Appendix A). The rf noise
levels for the Anchorage-Fairbanks transmission intertie
have been calculated.
RADIO FREQUENCY NOISE CALCULATIONS
corona generated rf noise levels for the three 345 kV trans-
mission lines have been calculated for heavy rain and wet
conductor conditions using methods developed at Project UHV
[2). Radio noise levels for average fair weather can be
estimated using averages of measured differences between
radio noise during heavy rain and during fair weather. For
345 kV lines this difference in noise levels is about 20 dBu [2).
-7-
The calculated levels of rf noise from the intertie operating
at 362.5 kV are given in Table 4 for three weather conditions;
heavy rain, wet conductor and fair weather. The radio noise
levels are calculated for a frequency of one megahertz which
is representative of the middle of the AM broadcast band. The
radio noise level at the low frequency end of the broadcast
band (550kHz) is 4.5 dB greater than at one megahertz and at
the high frequency end (1600 kHz) it is 5 dB lower.
HARDWARE RADIO FREQUENCY NOISE
Radio frequency noise from transmission lines may also be
generated by loose or damaged hardware where sparking can
occur. This problem is not unique to transmission lines but
also occurs on lower voltage distribution lines. No methods
are available for calculating the intensity of this type of
radio frequency noise. If this type of noise causes inter-
ference, techniques exist [ll] for locating and correcting
these sources of rf noise.
RADIO STATION SIGNAL STRENGTH MEASUREMENTS
The signal strengths of AM broadcast stations were measured
at eleven sites. At these sites, all thirteen radio stations
measured had very low signal levels and all signals were
below the level required by the Federal Communications
Commission for primary service in small towns and northern
rural areas. These measurements are discussed in Appendix A.
The results of these measurements are summarized in Table 5
in terms of the number of stations observed to provide various
grades of reception quality.
ESTIMATED RADIO RECEPTION QUALITY
The width of the zone of influence depends on the levels of
rf noise from the intertie for three different weather
conditions. The width of this zone during fair weather is
expected to be 800 feet, extending past the edge of the
right-of-way a distance of 200 feet. For wet conductor
conditions, this zone of influence is 1000 feet wide and
extends past the edge of the right-of-way a distance of 300
feet. For heavy rain conditions (expected to occur less
than 3 percent of the time) the zone of influence is 1600
feet wide and extends past the edge of the right-of-way a
distance of 600 feet.
-8-
Table 6 tabulates the maximum extent of the zones of influence
of corona generated rf noise from three transmission lines
operating at 362.5 kV. The width of these zones for the
different weather conditions will diminish when less than
three lines are energized and when the lines are operated at
voltages lower than 362.5 kV.
Based on the results of the radio noise calculations and the
results of measurements of AM radio station signal strengths
in the study area between Willow and Curry (Appendix A), it
is recommended that the minimum separation between the
centerline of the right-of-way and residences and long
parallels with the Parks Highway be 1000 feet. This provides
an adequate buffer zone and is expected to preserve the
existing quality of AM radio reception near the line route.
Between Curry and Garner, AM radio reception is almost non-
existant. Only one radio signal was measured at Deneki Lake
and that had a Grade D quality of reception.
The radio reception analysis pertains only to AM radio
reception in the commercial AM broadcast band for daylight
propagation condtions. During nighttime hours, the radio
propagation characteristics change dramatically and good AM
reception might be available only from a few high power
clear channel AM stations. Also during thunderstorms, high
levels of atmospheric static preclude noise-free AM radio
reception.
Should radio interference occur near the intertie, it is
theoretically possible to restore AM reception quality to
preconstruction conditions. However, there are practical
problems and limitations in implementing mitigative proce-
dures. The basic requirement to restore the existing quality
of radio reception is to reestablish the preconstruction
signal-to-noise ratio. Any method which decreases the radio
frequency noise without affecting the signal strength, or
which increases the signal strength but not the rf noise,
will be suitable. This will generally require locating an
outside antenna beyond the influence of radio noise from the
intertie and using a shielded lead-in to connect the antenna
to the radio. However, many radios manufactured in recent
years do not have provision for an external antenna. The
use of an external antenna may require modification of the
radio to permit connection of an external antenna. In some
cases it may be possible to use the directional character-
istics of an internal loop antenna by orienting the radio to
minimize the radio noise.
-9-
CB RADIO INTERFERENCE
Interference to a 27 MHz citizen band (CB) radio near the
intertie is theoretically possible in two ways: a) a "static"
type noise from corona while receiving and b) a signal
blocking effect by steel structures on both receiving and
transmitting. The severity of the static-like interference
will depend on the signal-to-noise ratio (SNR) and hence the
strength of the received signal.
As previously mentioned, the intensity of radio noise from
transmission line corona decreases with increasing distance
from the line and decreases at high radio frequencies.
Corona generated radio frequency noise will be about 48 dB
(250 times) lower at CB frequencies of 27 MHz than at a
frequency of one MHz.
Assuming typical CB signal strengths, it is estimated that
good CB communications (SNR = 16) can be obtained outside
the transmission line right-of-way during fair weather con-
ditions. During rain a separation of 100 feet will be
required for good CB communications. During thunderstorm
activity, atmospheric static will mask intertie rf noise in
the CB band.
Radio noise from loose or damaged transmission or distribution
line hardware could cause interference to CB radio reception.
If such noise sources cause problems, they can be located and
repaired [11].
TELEVISION INTERFERENCE
Interference to TV reception, when present, is a visible
interference in the received picture. The audio portion of
a TV signal is an FM radio system which is not subject to
static types of interference as was discussed in the section
on Radio Interference.
Of the thirteen different television signals measured in the
study area (Appendix A), nine of these signals were from
television translators. A television translator is a low
power facility (normally 10 watts) which receives a weak
signal from a primary television station and rebroadcasts
the video and audio on a different channel. A TV translator
is licensed to provide service to a small geographical area.
A TV translator is therefore located near more densly pop-
ulated areas such as Talkeetna and Healy, which are areas
-10-
receiving relatively weak TV signals from Anchorage and
Fairbanks respectively. Measurements show that these signals
can be detected up to about 20-30 miles from the translator
tower with diminishing quality of reception as the distance
from the translator tower increases (Appendix A).
In the service area of a TV translator, the rebroadcasted
signal from the translator is stronger than the weak signal
of the primary television station and is therefore less
susceptible to interference from the intertie.
Television interference from transmission lines is possible
from three sources: a) corona generated interference, b)
interference from spark discharges associated with loose or
damaged hardware, and c) "ghost" images resulting from TV
signal reflections from large metallic structures.
Corona generated rf noise is quite small in the very high
frequency (VHF) range used for television transmission.
Generally, if the AM radio reception associated with a
particular transmission line is acceptable, then TV inter-
ference from corona will not be a problem.
Spark discharges associated with loose or damaged hardware
can cause TV interference. This problem is not unique to
transmission lines but also occurs on lower voltage dis-
tribution lines. Loose or damaged hardware can be located
and repaired to eliminate this source of interference [11].
Reception of TV signals reflected from large structures can
cause delayed or "ghost" images in the TV picture. The
tubular steel structures used for the intertie are not
expected to reflect sufficient TV signals to cause ghost
images. Modification of or addition to the receiving TV
antenna system is the most effective means of alleviating
ghost images and must be considered on a case by case basis.
No TV reception problems are expected to result from the
intertie in locations where present TV reception is good.
ELECTRIC FIELDS
The maximum calculated electric field strength in the intertie
right-of-way is 6.9 kV/meter. At the edge of right-of-way,
the maximum field strength is 1.6 kV/meter. Other levels of
electric field strength for the proposed lines are given in
Table 7. These values are for a minimum conductor height of
30 feet, a 33 foot phase-to-phase spacing and an operating
voltage of 362.5 kV.
-11-
These field strengths are directly proportional to line
voltage and can be determined for any line voltage (V in
kV) by multiplying the given field strengths by v 1 /36~.5.
All field strength values are calculated for a standard
height of one meter above ground.
INDUCED CURRENTS
The electric field will induce electric charges on metallic
objects (such as vehicles) near the line. This induced
charge results in an electric current (induced current)
flowing between a vehicle and ground. The largest vehicle
allowed on Alaskan state highways without a special permit
[12] is 13.5 feet high, 8.5 feet wide and 70 feet long. For
this vehicle the maximum induced current will be approxi-
mately 4.5 milliamperes based on a perpendicular crossing of
a major road or highway, a conductor height of 30 feet and
a line operating voltage of 362.5 kV.
Induced currents on vehicles under and parallel to the
intertie will be greater than for the perpendicular vehicle
orientation. Calculations show that a large vehicle (13.5
feet high and 8.5 feet wide) longer than 45 feet and parallel
to the intertie will have an induced current greater than 5
milliamperes if it is positioned in the maximum electric
field produced by the intertie. However, vehicles this
large are not expected under and parallel to the intertie.
Smaller vehicles parallel to the intertie will satisfy the 5
milliampere criterion.
Measurements show that people touching a large vehicle
(i.e., bus or large truck) receive a current of 10 percent
or less [13] of the induced current about 90 percent of the
time. For an induced current of 4.5 milliamperes, the
current through the person touching the vehicle would be
about 0.5 milliamperes or less. A current of 0.5 milli-
amperes can be perceived by approximately 1.0 percent or
less of adult males [13]. The remaining 10 percent of the
time, the current through a person touching a vehicle ranges
between 10 percent and about 80 percent of the induced
current [13]. Even though such currents may become percept-
able, they will be safe since the NESC criterion of 5 milli-
amperes is satisfied. No shock hazard due to induced currents
from vehicles will result.
-12-
Existing metal fences and large stationary metallic objects
permanently located inside the right-of-way will be grounded
as an additional precaution.
MAGNETIC FIELDS
The maximum magnetic field strength und~r heavily loaded
345 kV transmission lines is typically 0.2 Gauss or less at
a height of one meter above ground. Such a field strength
is between 10 and 100 times smaller than magnetic fields from
common household tools and appliances [14] and is considered
harmless.
BIOLOGICAL EFFECTS
A comprehensive review of world literature covering several
hundred publications has been compiled in the book Biological
Effects of Electric and Magnetic Fields of Extremely low
Frequency (ELF) [15] by A. R. Sheppard and M. Eisenbud. The
authors conclude " ••• there is no evidence that the public
health or ecological systems have been jeopardized in the
slightest by artificial electromagnetic (transmission line
ELF) fields ••• " and " ••• neither is there a basis for alarm
concerning exposure (ELF) to the public."
A tutorial review of the biological influences of power
frequency electric fields by Bridges, [16] concludes "In the
interim, based on the above (Bridges') review, it does not
appear likely that power-frequency electric fields from
existing transmission lines can cause any important biologi-
cal effects on humans at ground level. However, the pos-
sibility of some subtle and yet undetected effect cannot be
excluded."
Although there is abundant evidence suggesting that no
short-term harmful biological effects of transmission line
fields exist, the electric utility industry continues to
sponsor additional research. The Electric Power Research
Institute (EPRI) in Palo Alto, California and the u. s.
Department of Energy (DOE) have funded research studies
totaling several millions of dollars. These and continuing
studies are examining the nature of long-term biological
effects of continuous exposure to transmission line fields
especially as they regard the health and safety of the public.
-13-
ELECTRICAL SAFETY
Two aspects of electrical safety relative to normal proximity
to the proposed 345 kV transmission lines are considered
below.
PHYSICAL CONTACT
Physical contact with energized transmission line conductors
or objects which touch them is hazardous and may result in
injury or death. The same, however, applies to lower voltage
distribution lines of all sizes.
The likelihood of direct contact with the energized conduc-
tors by a person is reduced by using a minimum conductor to
ground clearance which satisfies the National Electrical
Safety Code. The greatest hazard comes from a person raising
a long conductive object, such as a metallic irrigation pipe
into the conductors. This hazard is obvious and only careful
handling of such objects will prevent accidents.
VEHICLES
Since it is very difficult to visually judge distance from
overhead conductors, anyone operating equipment in close
proximity to a transmission line should know the height
of his equipment (including fully extended overhead appara-
tus) and should limit the height of the equipment to a safe
height.
The same precautions should be applied to lower voltage
distribution lines of all sizes which generally have lower
clearances.
-14-
REFERENCES
1. "Susitna Hydroelectric Project, Transmission Planning
Criteria," Letter from J. D. Lawrence (Acres American,
Inc.) toR. R. Hoop {Commonwealth Associates Inc.),
Augu~t 20, 1981.
2. Transmission Line Reference Book, 345 kV and Above,
Electric Power Research Institute, Palo Alto, California
94304' 1975.
3. Sebo, S. A., et.al., "Examination of Ozone Emanating
from EHV Transmission Line Corona Discharges," IEEE
Transmission on Power Apparatus and Systems, volume
PAS-95, Number 2, pp. 693-703, March/April 1976.
4. Snow, R. H., Kahn, s. R., Shiau, Y., and Bridges, J. E.,
"Ozone Concentrations Near the 345 kV Single Circuit
Dickinson-Wilmarth Transmission Line Under Conditions
of Zero Wind Velocity," IIT Research Institute, Project
No. 8194, February 1977.
5. Roach, J. F., et.al., "Ozone Concentration Measurements
on the C-Line at Apple Grove 750 kV Project and Theoret-
ical Estimates of Ozone Concentrations Near 765 kV Lines
of Normal Design," IEEE Transmission on Power Apparatus
and Systems, Volume PAS-97, Number 4, pp. 1392-1401
July/August 1978.
6. Environmental Protection Agency Regulation on National
Primary and Secondary Ambient Air Quality Standards,
40 CFR 50.9, July 1, 1980.
7. Perry, D. E., "An Analysis of Transmission Line Audible
Noise Levels Based Upon Field and Three-Phase Test Line
Measurements," IEEE Transactions on Power Apparatus
and Systems, Volume PAS-91, Number 3, pp. 857-865,
May/June 1972.
8. Environmental Protection Agency, Information of Levels
of Environmental Noise Requisite to Protect Public
Health and Welfare with an Adequate ~1argin of Safety,
Document 550/9-74-004, March 1974.
-15-
9. Committee on Hearing, Bioacoustics and Biomechanics,
Guidelines for Preparing Environmental Impact Statements
on Noise, National Academy of Sciences, Washington, D.C.,
1977.
10. Sound and Vibration Magazine, pp. 33-36, September 1974.
11. "The Location, Correction and Prevention of RI and TV!
Sources from Overhead Power Lines," IEEE Tutorial Course
76CH 1163-5-PWR, IEEE, New York, 1976.
12. Alaska Administrative Code, Title 17, Chapter 25.020
and Chapter 25.030, Alaska Register 78, July, 1981.
13. "The Electrostatic and Electromagnetic Effects of AC
Transmission Lines," IEEE Tutorial Course, 79 EH0145-3-PWR,
IEEE, New York, 1979.
14. Bridges, J. E., "Biological Effects of 60 Hertz Electric
Fields," liT Research Institute Final Report E8151, EPRI
Project RP-381-1, November 1975.
15. Sheppard, A. R., Eisenbud, M., Biological Effects of
Electric and Magnetic Fields of Extremely Low Frequency,
New York University Press, New York, NY 1977.
16. Bridges, J. E., and Preache, M., "Biological Influences
of Power Frequency Electric Fields - A Tutorial Review
From a Physical and Experimental Viewpoint," liT
Research Institute, Revised, March 1981.
-16-
TABLE 1
CALCULATED AUDIBLE NOISE LEVELS
(Three Transmission Lines Operating at 362.5 kV)
Weather
Conditions
Heavy Rain
Wet Conductor
Fair Weather
*200 feet from centerline
**Estimated
Maximum
Level
(dBA)
57
48
inaudible**
-17-
Location
Level at the
Edge of
Right-of-Way*
(dBA)
54
44
inaudible**
TABLE 2
SUMMARY OF HUMAN EFFECTS FOR OUTDOOR DAY-NIGHT
AVERAGE SOUND LEVEL OF 55 DECIBELS
Type of Effects
Speech -Indoors
-Outdoors
Average Community
Reaction
High Annoyance
Attitudes Towards Area
Magnitude of Effect
No disturbance of speech: 100% sentence
intelligibility (average) with a 5 dB
margin of safety
Slight disturbance of speech with:
100% sentence intelligibility (average)
at 0.35 meter
or
99% sentence intelligibility (average)
at 1.0 meter
or
95% sentence intelligibility (average)
at 3.5 meters
None; 7 dB below level of significant
"complaints and threats of legal
action" and at least 16 dB below
"vigorous action" (attitudes and other
non-acoustical factors may modify this
effect)
Depending on attitude and other non-
acoustical factors, approx. 5% of the
population will be highly annoyed.
Noise essentially the least important
of various factors
WET CONDUCTOR EQUIVALENT DAY-NIGHT
AVERAGE SOUND LEVEL WITH OTHER NOISE SOURCES EXCLUDED
Vlet Conductor Day-Night Average (Ldn)
44 dBA 50.4 dB
l Ldn = 10 log 24 (l 5 [lOLd/10] + 9 [lO (Ln + 10)/10])
Where Ld = 44 dBA (assumed)
Ln = 44 dBA (assumed)
-18-
TABLE 3
NOISE LEVELS OF TYPICAL NOISE SOURCES
Noise Source Operator* Community**
(dBA) (dBA)
Air Conditioners 70-96 52-77
Power Lawn Equipment 80-95 59-85
Chain Saws 103-115 64-86
Automobiles 55-8 7 77-8 7
Snowmobiles 100-116 78-88
Motorcycles
Less than 24 0 cc 90-105 70-90
Greater than 24 0 cc 95-115 78-95
Trucks 70-100 70-95
*Operator: Noise levels measured at the position of the
operator of the noise source
**Community: Noise levels measured at locations 50 feet
from the center line of the path of the source
or 50 feet from the source.
-19-
TABLE 4
CALCULATED TRANSMISSION LINE RF NOISE LEVELS
(Three Transmission Lines Operating at 362.5 kV)
1 MHZ
Lateral Separation vveather Conditions
From Edge of Heavx: Rain Wet Conductor Fair Weather
Right-of-Way (dBu) (dBu) (dBu)
0' 69 57 49
100' 50 38 30
200' 40 28 20*
300' 34 22* 14*
400' 29 19* 9*
500' 25 15* 5*
600' 22* 12* 2*
700' 20* 10* O*
800' 18* 8* -2*
Note: Average value of measured ambient rf noise level is
25 dBu.
*No impact of corona generated transmission line rf noise
is expected on the existing quality of radio reception.
-20-
TABLE 5
Existing Quality of Reception for AM Radio Stations
(Based on Field Measurements of Radio Station
Signal Strengths July 9-15, 1981)
Site
Number
10
20
30
40
50A
60
70
80
90
100
llOA
LEGEND:
Location
Willow
Trapper Creek
Chase
Lane Creek
Curry
Cantwell
Carlo Creek
Deneki Lake
McKinley Village
McKinley Park
Healy
A -Entirely Satisfactory
Number of Radio Stations
Judged to have the following
Quality of Radio Reception
A B C D E
3 3
2 2 3
1 4
1 1 4
1
1
1
1 3
1 1
B -Very Good, Background Unobtrusive
C -Fairly Satisfactory, Background Plainly Evident
D -Background Very Evident, Speech Understandable With
Concentrating
E -Speech Unintelligible
-21-
TABLE 6
ZONES OF INFLUENCE OF TRANSMISSION LINE
RADIO FREQUENCY NOISE
Weather Condition
Fair Weather
Wet Conductor
Heavy Rain**
Width of Zone
(Feet)
800
1000
1600
Distance Away From
Edge of Right-of-Way
(Feet)*
200
300
600
*At greater distances from the edge of the right-of-way,
no impact on the quality of radio reception from the
operation of the intertie is foreseen for the weather
conditions cited.
**Condition of the highest levels of radio noise from the
intertie.
-22-
TABLE 7
CALCULATED TRANSMISSION LINE ELECTRIC FIELD STRENGTHS
(Three Transmission Lines Operating at 362.5 kV)
Lateral Separation
from Centerline
of Right-of-Way
0
50
100
150
200
300
400
Calculated Electric
Field Strengths
kV/m
5.14
3. 78
3.90
6.90*
1.61**
0.22
0.07
*The maximum value of electric field strength occurs near
the outside phase conductors.
**Value of electric field strength at the edge of the right-of-way.
-23-
)>
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"'tt m z c
X
)>
APPENDIX A
RESULTS OF PRECONSTRUCTION MEASUREMENTS OF
RADIO AND TV SIGNAL STRENGTHS
AND
RADIO FREQUENCY NOISE
ALASKA POWER AUTHORITY
JULY 9, 1981 -JULY 15, 1981
Measurements by:
D. A. Reynolds -CAI
J F. Terri -CAI
APPENDIX A
TABLE OF CONTENTS
SCOPE • . . . . . . . . . . . . . . . . . . . . . . .
SUMMARY • . . . . . . . . .
FIELD SURVEY . . . . . . . . . . . . . . . . . .
INSTRUMENTATION AND DATA . . . . . . . . . . . .
RADIO SIGNAL STRENGTH AND NOISE EQUIPMENT . . .
Page
A-1
A-1
A-3
A-3
A-3
RADIO SIGNAL AND-NOISE DATA • • • • • • • • • • A-4
TELEVISION SIGNAL STRENGTH AND NOISE EQUIPMENT • A-6
TELEVISION SIGNAL AND NOISE DATA
TABULATED DATA • • • • • • • • • • •
SITE AND WEATHER DATA • • • • •
AM QUALITY OF RECEPTION SUMMARY
AM RADIO SIGNAL AND NOISE DATA •
. . . . . .
. . . . . . . .
. . . . . . . .
. . . . . . . .
TV SIGNAL AND NOISE DATA • • • . . . . .
A-7
RESULTS OF PRECONSTRUCTION MEASUREMENTS OF
RADIO AND TV SIGNAL STRENGTHS AND RADIO FREQUENCY NOISE
SCOPE
This appendix covers the pre-construction measurements of AM
radio signal strengths, background radio noise, television
signal strengths and television background noise in the
study area between Willow and Healy, Alaska. These measure-
ments are intended to serve as a record of the precon-
struction signal strengths and noise levels at 11 sites near
the intertie corridor.
SUMMARY
Based on Federal Communication Commission (FCC) criteria,
all AM radio stations received at the 11 sites offer inter-
mittent service in the study area. According to the FCC,
these radio signals are subject to fading and interference
from atmospheric and man-made noise.
The quality of AM radio reception was judged by the observers
while making measurements of the AM signal strengths. Five
grades, A through E, were used to evaluate the quality of
radio reception. No radio signal received had a Grade A or
Grade B quality of reception. Seven different AM radio
stations measured had a Grade C or Grade D quality of recep-
tion. At Willow six of these stations were received, at
Trapper Creek four of these stations were received, and at
Lane Creek two of these stations were received. Between
Lane Creek and Curry, these last two stations faded out.
Between Lane Creek and McKinley Park, only one radio station
having a Grade D quality of reception was received.
A-1
To preserve the existing quality of reception of the very
weak radio station signals measured between Willow and Curry,
it is necessary to recommend a minimum separation between
parallel route segments and the Parks Highway and between
the line route and residences. Between Willow and Curry
the minimum recommended separation is given in the engineering
report.
TV signals, especially those from the TV translators, are
much stronger on a relative basis than the measured AM radio
signal strengths due to the proximity of TV translator
antennae. In areas of strong signal strengths, no inter-
ference from the 345 kV intertie is anticipated, provided
that the minimum recommended separation from the line route
to the residences (between Willow and Curry) is satisfied.
During these measurements, signal strengths from 13 tele-
vision stations and translators were measured at the ll
sites. Five grades, A through E, were used to evaluate the
quality of audio reception of television signals. Four
television stations from Anchorage were received at Willow,
and each had a Grade A or Grade B quality of audio recep-
tion. One television station from Anchorage was received
at Trapper Creek, and one television station from Fairbanks
was received at Healy. Both had a Grade B quality of audio
reception. No other signals from television stations having
a Grade A, B or C quality of audio reception were received.
All other TV signals which had Grade A, B or C quality of
audio reception were from TV translators. Signals from
seven such translators were measured between Trapper Creek
and Healy.
A-2
FIELD SURVEY
This survey was conducted at 11 sites in the study area be-
tween Willow and Healy, Alaska as shown as Figure A.l. The
measurements were made during the period July 9, 1981, to
July 15, 1981.
A description of each measurement site and weather conditions
at the time of measurement are contained in the "Site Location
and Weather Data" exhibits.
INSTRUMENTATION AND DATA
The instrumentation used in making the measurements is
described below. A brief discussion of the results of the
measurements is also included.
RADIO SIGNAL STRENGTH AND NOISE EQUIPMENT
The radio signal strengths and background radio frequency
noise levels in the AM broadcast band (540-1600 kHz)
were measured using an Ailtech NM-17/27A electromagnetic
interference field intensity meter (Leasemetric serial number
0514-81146), an Ailtech vertical rod antenna (Model 92197-5),
an Ailtech rod antenna coupler (Model Number 94592-1) and
ground plane (Model 92199-3). The rod antenna was mounted
on the antenna coupler that was attached to a ground plane
normally placed on the ground and remote from the meter.
(At Site 20, Trapper Creek, a tripod was used to elevate the
ground plane approximately 4 feet above ground.) The antenna
coupler was connected to the meter by a 100 foot long radio
frequency coaxial cable. The bandwidth of the NM-17/27A
was approximately 5 kHz. The calibration of the meter was
periodically checked using an internal calibrator. The
A-3
NM-17/27A was factory calibrated on June 29, 1981, and the
vertical rod antenna, rod antenna coupler and ground plane
were calibrated on June 5, 1981.
RADIO SIGNALS AND NOISE DATA
Signal strengths from 13 different standard broadcast {AM)
radio stations were measured at the 11 sites. A summary of
these stations are tabulated in "AM Radio Stations Received."
These stations are listed by frequency with the station call
letters, transmitter location, power, antenna and operating
information.
Only Class II and Class III stations were received. Class II
stations are licensed by the Federal Communication Commission
{FCC) to operate on a clear channel and render primary service
over wide areas. Class III stations are licensed by the FCC
to operate on a regional channel and render primary service
to large cities {municipalities) and surrounding areas. The
primary service area is the area in which the radio signal
is not subject to objectionable interference or fading. In
northern rural areas, the FCC requires a minimum signal
strength of 40 dBu for primary service. Since the maximum
signal strength measured at the 11 sites is only 37 dBu, no
stations offer primary service in the study area.
The FCC defines an intermittent service area as an area
receiving service from a ground wave signal beyond the
primary service area. The intermittent service area is
subject to fading and some interference {from atmospheric
and man-made noise). Therefore, all 13 radio stations pro-
vide intermittent service to the study area.
A-4
Measured radio frequency noise and AM radio signal strengths
are tabulated in summary form in "RF Signal Strength and
Ambient Noise Survey" for each of the 11 sites.
Background radio frequency noise measurements were made at
five station-free frequencies distributed throughout the AM
broadcast band. The quasi-peak (QP) detector mode was used
for these measurements. The results are given in decibels
based on a one microvolt per meter reference level, i.e., dBu.
The signal strength of the radio stations was measured using
the field intensity (FI) detector mode. These results are
also given in dBu.
The quality of reception of each radio station, based on the
subjective evaluation of the observers, is given. The letter
classification is based on the reception quality definitions
as follows:
Reception
Quality
A
B
c
D
E
Definition
Entirely satisfactory.
Very good, background unobtrusive.
Fairly satisfactory, background plainly
evident.
Background very evident, but speech
easily understood.
Speech unintelligible.
A-5
Those AM radio signals having a Grade E quality of reception
should be disregarded.
Very few AM radio stations were received between Willow and
Healy, and those that were received had a low signal strength.
Reception quality was no better than fairly satisfactory,
Grade C.
At all 11 sites only three radio stations were received with a
Grade C quality of reception and only four were received with
a Grade D quality of reception. The station having the strongest
signal (37 dBu) was measured at Willow. All other signal
strengths measured at the 11 sites were below this level. A
summary of the observed quality of reception at each of the
11 sites is tabulated in "Existing Quality of Reception for
AM Radio Stations."
Graphs of the "Measured Radio Signal Strength (dBu)," showing
the ambient noise level and the signal strengths required
for primary service in small towns and northern rural areas,
have been prepared for each of the 11 sites. These graphs
illustrate that radio signal strengths are very low.
TELEVISION SIGNAL STRENGTH AND NOISE EQUIPMENT
An Ailtech NM-37/57 electromagnetic interference/field intensity
meter (Model Number 0389-06293) was used to make the signal
strength and background radio frequency noise measurements
in the VHF and UHF frequency spectrum allocated for commer-
cial television. Two antennae were used. A biconical antenna,
Model 94455-1, was used for frequencies in the range from
20 MHz to 200 MHz. A conical logarithmic spiral antenna,
A-6
Model 93490-1, was used over the frequency range from
200 MHz to 800 MHz. Each antenna was normally mounted at a
height of approximately 29 feet above ground and was connected
to the NM-37/57 by a 100-foot long radio frequency coaxial
cable. At Sites 30, 40 and 50A, each 0 antenna was mounted at
a height of approximately 24 feet above ground. At Sites
90, 100 and llOA, each antenna was mounted on a tripod at a
height of approximately 8 feet due to wind conditions.
Each antenna was rotated in the horizontal plane to obtain
maximum video signal strength on each channel received. The
antenna was left in this position for the noise measurement.
The bandwidth of the NM-37/57 was 1.0 MHz. The calibration
of the meter was checked prior to each measurement using an
internal calibrator. The NM-37/57 was calibrated on
March 20, 1981.
A 2-4 dB correction factor was used to correct for signal
attenuation in the 100-foot coaxial cable.
TELEVISION SIGNAL AND NOISE DATA
Signal strengths from 13 different television stations and
TV translators were measured at the 11 sites. A summary of
these stations and translators is tabulated in "TV Stations
Received." These stations and translators are listed by
channel with the call letters, location, transmitter power
and broadcast antenna height.
A summary of the measured video signal strengths and back-
ground radio frequency noise is tabulated in "TV Signal
Strength and Ambient Noise Survey., for each of the 11 sites.
A-7
The signal strength of the television video signal was
measured using the quasi-peak (QP) detector mode. The
background radio frequency noise was measured at a clear
frequency slightly below the video carrier frequency. The
quasi-peak (QP) detector mode was also used for this measure-
ment. The results of these measurements are given in dBu.
The TV signal strength readings contained in this report do
not necessarily indicate any particular reception quality.
Television signals too weak to provide good video reception
can be detected and measured by the NM-37/57 measurement
system.
The quality of audio reception of each television signal,
based on the subjective evaluation of the observers, is
given in "TV Signal Strength and Ambient Noise Survey."
Five grades, A through E, the same used for the evaluation of
the quality of radio reception, were also used in the evalua-
tion of the quality of audio reception of the television
signals. Those TV signals having a Grade E quality of audio
reception, "speech unintelligible," should be disregarded.
A summary of the observed quality of audio reception for
television signals at each of the 11 sites is tabulated in
"Existing Quality of Television Reception (Audio)."
At all sites other than Willow, the television signals
judged to have a Grade A or Grade B quality of audio recep-
tion were from nearby TV translators.
At six sites, at least one television signal was judged to
have a Grade A quality of audio reception. At the remaining
five sites, no television signals were judged to have better
than Grade D quality of audio reception.
A-8
Based on the results of this subjective evaluation of the
quality of audio reception for television signals, no ad-
ditional recommendations for locating the transmission line
route, over and above these recommendations offered for
preserving the quality of radio reception, are required.
A-9
If>..
-~~ ·'--· iT .. -" J . . -...,..
'. "'~'. ~ Moo.."\ >1. -~-M .a1r..r ~ .. ~~~·":
,. ,.
-... "'"J'.
rt
~
: j
---.. "!,
1.·. •.·
F J•-,
f 'J . ~ .__
:_ __ ' __ '<_. M? . ...iL
R .7W. f R .6W.
FIGURE A-1
( Alaska Power Authority] ANCHORAGE FAIRBANKS TRANSMISSION INTERTIE
0 1 0 2 0 M ile s 4
0 1 0 20 Kil omet e r s
~ Gi lb e rt/C ommo nw ealth North
Location of
Measurement Sites
SITE LOCATION -WEATHER DATA
ALASKA POWER AUTHORITY
Observers: D. Reynolds Sketch of Location
J. Torri
Date: 07-09-81 Site: 10 ~
~
Willow ~
<:l -
Time: Start 13:00
Finish 18:50
Temperature: Wet 56°F
Dry 58°F
Relative Humidity 88%
Barometric Pressure 28.1"
Wind: RA.VGE 4W' Speed (mph) <5 71111(NSN!I"' /'!N
S~Cr!Of'/ 8
Direction s
Weather Description: Overcast, Light Drizzle
Site Description: Willow Airport, located at southern most
clearing off Taxiway. Site surrounded on 3 sides by 40 feet
tall deciduous trees.
Closest Residence: None visible
Topography: Flat
Shielding Terrain or Structures: None visible
Sources of Radio Noise: Ambient. Distribution line located
250' west of site was very quiet.
Direction of Site Location Photographs: 1-N, 2-E, 3-S, 4-W
Comments:
N
t
SITE LOCATION -WEATHER DATA
ALASKA POWER AUTHORITY
Observers: D. Reynolds
J. Torri
p. Robinson*
Date: 07-11-81
Time: Start
Finish
Temperature: Wet
Dry
Relative Humidity
Barometric Pressure
Wind: Speed (mph)
Site: 20
Trapper Creek
09:25
12:15
100%
28.05"
<5
Direction s
Sketch of Location
T~AI'P~Il t:R£E!< PP.s r Pl'rlc .=
P.ET£1($VIU.~ ROIIP
Weather Description: overcast and raining
Site Description: Gravel pit west of Parks Highway. First
pit south of Petersville Road. Gravel pit surrounded by
brush about 3 feet tall. Brush surrounded by tall deciduous
trees.
Closest Residence: None visible
Topography: Rolling terrain. Gravel pit was filled with water.
Shielding Terrain or Structures: None visible
Sources of Radio Noise: Ambient.
Direction of Site Location Photographs: 1-N, 2-E, 3-S, 4-W
*Comments: The calibrated rod antenna (including base plate
and antenna coupler) was mounted 4 feet above ground on a
tripod. Pete Robinson, a resident of Trapper Creek, observed
these measurements.
N
t
SITE LOCATION -WEATHER DATA
ALASKA POWER AUTHORITY
Observers: D. Reynolds
J. Torri
Sketch of Location
Date: 07-12-81 Site: 30
Chase
Time: Start 13:40
Finish 14:25
Temperature: Wet
Dry
Relative Humidity 78%
Barometric Pressure
Wind: Speed (mph) <5
Direction S
Weather Description: Overcast
RIIA/~E "'f-W
rpt,.IP~I(fl' Z7/tl
5£CTtON 8
TREES
StJKJ/cY ~.4Rt<cR
ZR-IB I~S!
H£i.ICOPT£K _ ___.,.....
LtgAT/ON
t11/5K£G
Site Description: Alaskan muskeg surrounded by short black
spruce and then by taller coniferous and deciduous trees.
Panel Point 2R-18 was positively identified.
Closest Residence: None visible
Topography: Flat muskeg in hilly terrain.
Shielding Terrain or Structures: None visible
Sources of Radio Noise: Ambient.
Direction of Site Location Photographs: 1-N, 2-E, 3-S, 4-W
Comments: Helicopter access. TV mast was about 23'-4" tall.
SITE LOCATION -WEATHER DATA
ALASKA POWER AUTHORITY
Observers: D. Reynolds
J. Torri
Sketch of Location
Date: 07-12-81
Time: Start
Finish
Temperature: Wet
Dry
Relative Humidity
Barometric Pressure
Wind: Speed (mph)
Site: 40
Lane Creek
10:15
12:35
53°F
56°F
82%
<5
Direction s
Weather Description: Overcast
!?ANG~ 4-W
T41VIVSHIP ,ZS!v'
5ECT!t>N S
T~.t=£5
J/EL/COPIE~
LOCATION
TR#S
8.._AM
MU5K£G-
Site Description: Alaskan muskeg surrounded by black spruce
and then by taller coniferous and deciduous trees. Panel
Point 2R-2 was positively identified. Mountain visible to
northwest.
Closest Residence: None visible
Topography: Flat muskeg in gently rolling terrain.
Shielding Terrain or Structures: Trees, mountain to northwest.
Sources of Radio Noise: Ambient.
Direction of Site Location Photographs: 1-N, 2-E, 3-S, 4-W
Comments: Helicopter access. TV mast was about 23'-4" tall.
tJ
t
SITE LOCATION -WEATHER DATA
ALASKA POWER AUTHORITY
observers: D. Reynolds Sketch of Location
J. Torri
Date: 07-12-81 Site: 50A TREE5
Curry T!<EES'
Time: Start: 15:15 ~~
Finish 16:15*
~,J N
1/' t Temperature: Wet 55°F v'\ ~
Dry 58°F
Relative Humidity 83%
//(E£5
Barometric Pressure RANGE 4-W
TDW/V$/11,. 2'!1/o/ Wind: Speed (mph) <5 SEC.71 Of./ I 0 IR&:5
Direction s
Weather Description: overcast with drizzle.
Site Description: Clearing within 500 feet of the Curry
Depot. Survey marker 29-4W/OA/1980 (R&M consultants) was
positively identified.
Closest Residence: Curry Train Station 500 feet west.
Topography: In Susitna River valley with mountains to the
east and west.
'TREES
Shielding Terrain or Structures: Mountains to the east and west.
Sources of Radio Noise: Ambient. Distribution line 700 feet
northwest of the site was very quiet.
Direction of Site Location Photographs: 1-N, 2-E, 3-S, 4-W
Comments: Helicopter access. TV mast was about 23'4" tall.
The original site selected at Curry was on a gravel bar in
the susitna River. Due to the heavy rainfall during the
previous two days, the gravel bar was under water.
*Estimated
SITE LOCATION -WEATHER DATA
ALASKA POWER AUTHORITY
Observers: D. Reynolds
J. Terri
Sketch of Location
Date: 07-11-81 Site: 60
Cantwell
Time: Start 17:15 N
Finish 18:30 t
Temperature: Wet 49°F
Dry 5l°F
Relative Humidity 87%
Barometric Pressure 27.4"
Wind: Speed {mph) 9-17
Direction S
Weather Description: Heavy overcast, showers
li'A.N6£' 7 W
TOWN.NIIP /Bf
!!U.Cr!OI'{ 4
Site Description:
of the Jack River.
Gravel pit west of Parks Highway and south
Located about 3/4 mile south of Cantwell.
Closest Residence: None visible
Topography: Gently rolling terrain around gravel pit.
Mountains northeast and west of gravel pit.
Shielding Terrain or Structures: Mountains
Sources of Radio Noise: Ambient.
Direction of Site Location Photographs: 1-N, 2-E, 3-S, 4-W
Comments: Located AM antenna coupler on top of 20' tall
gravel ridge due to very weak signal.
SITE LOCATION -WEATHER DATA
ALASKA POWER AUTHORITY
Observers: D. Reynolds
J. Terri
Date: 0 7-15-81 Site: 70
Carlo Creek
Time: Start 10:45
Finish 12:20
Temperature: Wet 52°F
Dry 53°F
Relative Humidity 94%
Barometric Pressure 26.80"
Wind: Speed (mph) 6-12
Direction 290° Magnetic
Sketch of Location
TReE..r
N
t
Rl'ltv~c
TIWI{$HI P /5"5
sec.rttJM 3c. TREE!
Weather Description: Cloudy, very low ceiling, light misty rain.
Site Description: Second level of gravel pit 0.4 miles north
of Carlo Creek along Parks Highway.
Closest Residence: 3 residences about 1/4 mile away on east
side of Parks Highway
Topography: Mountainous terrain
Shielding Terrain or Structures: Rim around northwest and
southwest of gravel pit about 40 feet above site.
Sources of Radio Noise: Ambient.
Direction of Site Location Photographs: 1-N, 2-E, 3-S, 4-W
Comments:
SITE LOCATION -WEATHER DATA
ALASKA POWER AUTHORITY
Observers: D. Reynolds
J. Terri
Date: 07-15-81 Site:
Deneki
Time: Start 12:50
80
Lake
Finish 15:45*
Temperature: Wet 53°F
Dry 57°F
Relative Humidity 77%
Barometric Pressure 26.8"
Wind: Speed (mph) <5-14
Direction s
Sketch of Location
!llfNGE t:.W
IDW#SII/P ISS
SECrtOIV /II
tJ
1
T/lEES
Weather Description: Hazy, low ceiling, broken clouds
T~E~S
Site Description: Gravel pit approximately 2 miles north of
Carlo Creek along east side of Parks Highway.
Closest Residence: None visible
Topography: Mountainous terrain. Site is at a crest of a
rise where highway goes down hill in both directions.
Shielding Terrain or Structures: None at crest of small hill.
Sources of Radio Noise: None visible
Direction of Site Location Photographs: 1-N, 2-E, 3-S, 4-W
Comments:
*Estimated
SITE LOCATION -WEATHER DATA
ALASKA POWER AUTHORITY
Observers: D. Reynolds
J. Terri
Date : 0 7-14-81 site : 9 0
McKinley Village
Time: Start 14:30
Finish 16:30
Temperature: Wet 51 °F
Relative Humidity 57%
Barometric Pressure 27.45
Wind: Speed (mph)
Direction
Weather Description: overcast.
Sketch of Location
RIINtJ-E 7 W
TtJW#SII/17 /45
SeCTION 3~
GR!ZZLEY 8EA!?
C/lrlPER p,111RK TV
Site Description: West of McKinley Village at entrance to
the Grizzley Bear Camper Park.
11cK!NLEV
V!t..L.AGE
Closest Residence: Camper park office within 300 feet of site.
McKinley Village is across Parks Highway.
Topography: Rolling terrain surrounded by mountains.
Shielding Terrain or Structures: Nearby mountains
Sources of Radio Noise: Ambient.
Direction of Site Location Photographs: 1-N, 2-E, 3-S, 4-W
comments: TV mast was not used due to swirling winds in
parking lot. used tripod for TV measurements located at
entrance road and Parks Highway. Elevation of TV antenna
appeared to be the same as visible TV antennas located in
McKinley Village.
SITE LOCATION -WEATHER DATA
ALASKA POWER AUTHORITY
Observers: D. Reynolds
J. Torri
Date: 07-14-81 Site: 100
McKinley Park
Time: Start 11:45
Finish 13:00*
Temperature: Wet 51°F
Dry 59°F
Relative Humidity 57%
Barometric Pressure
Wind: Speed {mph) 15-27
Direction s
Weather Description: Overcast.
Sketch of Location
f{
1
RAA.JGc 7w .
TOIIIN'SIIIP 135
S£CTI"tV 3+
Site Description: Gravel pit northwest of bridge where the
Parks Highway crosses the Nenana River.
Closest Residence: 1/2 mile north.
Topography: Mountainous.
Shielding Terrain or Structures: Nearby mountains
Sources of Radio Noise: Ambient.
Direction of Site Location Photographs: 1-N, 2-E, 3-S, 4-W
Comments: Tripod used for TV antenna due to strong winds.
*Estimated
SITE LOCATION -WEATHER DATA
ALASKA PmvER AUTHORITY
Observers: D. Reynolds
J. Torri
Date: 07-13-81 Site: llOA
Healy
Time: Start 16:10
Finish 17:50*
Temperature:
Dry 63°F
Relative Humidity 50%
Barometric Pressure
Wind: Speed (mph)
Direction
Sketch of Location
A8A..VPi?A./.Fo
AtR STRIP ---+----1
"' I
7W
TtJINKSHIP 125
s.ccrtt:7N z.~
Weather Description: Broken clouds.
Site Description: Located on Alaska Railroad property along
gravel road at a hilltop between the abandoned gravel air strip
and the Parks Highway.
Closest Residence: None visible
Topography: Flat hilltop, surrounded by distant rugged
mountains.
Shielding Terrain or Structures: Distant mountains
Sources of Radio Noise: Ambient. The 138 kV transmission line
1/2 mile east was very quiet at this site.
Direction of Site Location Photographs: 1-N, 2-E, 3-S, 4-W
Comments: The original site at the parking lot at the Healy
Depot of the Alaska Railroad was full of cars and trucks. The
depot agent suggested a site near the abandoned air strip.
Tripod was used for TV antenna due to strong wind gusts.
*Estimated
Freq.
kHz
sso
S60
S80
S90
6SO
660
700
7SO
900
970
1080
llSO
1170
Key:
DA-2
DA-N
LS
N
*
Station
Call
KEN!
KVOK
KYUK
KHAR
KYAK
KFAR
KBYR
KFQD
KFRB
KIAK
KANC
KABN
KJNP
AM RADIO STATIONS RECEIVED
ALASKA POWER AUTHORITY
Power
Location kW
Anchorage s
Kodiak 1
Bethel s
Anchorage s
Anchorage so
Fairbanks 10
Anchorage LS-1, N-.S
Anchorage LS -S 0, N-10
Fairbanks 10
Fairbanks s
Anchorage 10
Long Island (Big Lake) s
North Pole so
Antenna
Limitation
DA-2
DA-N
-Directional Antenna, different patterns day and night
-Directional Antenna during night only
-Local Sunset
-Night
-See Text, Page A-4
Station
Class *
III
III
III
III
II
II
II
II
II
III
II
III
II
RF SIGNAL SfRENGTH AND
AMBIENT NOISE SURVEY
FC•&=;~
ALA~KA POWER AUTHORITY
-=.I TE :1. 0
~·JILLm·J
5 TAFH : 15 : 00 OB5ERUER5: D. REYNOLD5
.J. TOPRI
fFEG!UENC'·•'
!-:.Hz
540
::::00
1000
1300
1600
550
5:30
~~~50
750
10030
1150
FINI5H: 1.:::.:30
CALL
LETTER5
NOI5E
NOI5E
NOI5E
NOI5E
NOI5E
j-:;'"('l_!j-:;
HVAH*
t-:;nm
f-::ANC
t·iETEF::
F::EAD I t·lG
de·#
27. 0(G!P)
27. 0(G!F')
z.~,. 5 ( G!t=·)
24. 5(G!P)
25. 0(,~P)
27.0
·-=··-· c:-k:r. ·-'
35.0
40.0
2;3.0
37.0
* 5TATION CALL VERIFIED
ATTENUATOF:: At·HENNA
5ETTINC. FACTO!=::
de. de.
-40 3';'. 0
-40 37.0
-40 37.0
-40 37.5
-40 3::;. 0
-40 3·;·. 0
-40 3i:i. 0
-40 37.0
-40 37.0
-40 37.0
-40 -='..., = ·-'·~· . ·-·
() COCHANNEL OR ADJACENT CHANNEL INTERFERENCE
? 5TATION NOT IDENTIFIED
# 5IGNAL I5 FIELD INTENSITY(~!)
NOI5E I5 QUA5I-PEAH(QP)
OB5EF::I . .JED
5IGNAL F::ECEPT I ON
5TF::ENC:rTH G!UALIT'-c'
dE:·: 1u1...',.··'M
2·!·. 0
24.0
23.5
22.0
23.0
2~~~. 0 D
27.5 D
32.0 ,-. -·
37.0 ,-. -·
25.0 D
34.5 c
5ITE 10
DATE:
~F SIGNAL STRENGTH AND
AMBIENT NOISE SURVEY
FC~J=;:
ALASKA POWER AUTHORITY
'11,.···;::;1
::= • .I TE :20
TRAPPER cr-;:EEt-=;
5TRFrT :25 OB5ERVER5: D. REVNOLD5
._1. TORr-;:r
FJ=::EC!UENC'"i'
!-=.Hz
530
eenl!
1000
1300
1.!·00
550
,::,50
700
750
10;::;0
1150
FINI5f'
LE
.-.• c:-,-. .,. •. _: :r
NOI5E
NOI5E
NOI5E
NOI5E
NOI5E
t<ENI
f-::HRR
f-:;'/RJ-::
t-=;e.· ... ·J=::
J-=:FG!D
~<RNC
!-=:Ae.N
t·iETEP
PERDINC:.
dE:·#
27. 5(C!P)
2,!,. 5 ( G!l=·)
2~~~. 5(G!F')
:24. 5(G!!=•)
:25. 0(G!P)
•'":-"":I ..:..·-'. 5
2·~~. 5
32. c-·-·
:21 .0
37. 0
27. 0
·"':·.:· ~'-'• 0
* 5TRTION CALL VERIFIED
ATTEI'iURTOJ=:: Rt·iTEI'iNR
5ETTINC:. FACTO!==:
de. .:::e.
-40 3·;:·. 0
-40 37. 0
-40 -:o-, ·-'··· . 0
--40 ~-, r= ·-'··· . ·-·
-40 ~·=· ._:,_ .. 0
-40 "':'·-· ·-' :r. 0
-40 3;=j· 0
-40 '"='-::' 0 ·-··· .
-40 -:a:-, 0 ._l,o' .
-40 '"='""" ._ ..... 0
-40 -;,-, ·-'··· . 0
-40 "':"-, r=
,_l,o' • ·-·
() COCHANNEL DR ADJACENT CHANNEL INTERFERENCE
·::· 5TATION No·
# 5 I C:.t·iRL I 5 f
NOI5E I5 G!
EtHIFIED
J INTEN5IT'/(FI)
-PERf-:; ( G!P)
P. r-;:OB I N50N
Of:·5ER 1..JED
5IC:.NRL F=:ECEPT I Ot·i
5TRENC:.TH G!URLIT'/
df:·: 1 U 1...',.··'t·1
·-=·..: c-..:..•-'. ·-·
·"":·"':1 C" .a:..,._ •• ·-'
·-=·~ .a:..·-'. c-·-· ·-=··"':· 0 ..:...a:..
23.0
22. 5 E
:24. 5 E
·"':··-· c-c: .a:..:r . ·-·
1 ;;:; • 0 E
34. 0 c
:24. 0 [I
·~·= ..... _ .. 5 [I
5ITE :20
RF SIGNAL STRENGTH AND
AMBIENT NOISE ~URUEY
FC•t==:
ALASKA POWER AUTHORITY
:=.I TE 30
CHA5E
5TAF::T: 12:50 OB5ERVER5: D. REYNOLD5
._i. TOHFH
FHEf.!UENC'.,-'
1-:.H:::
530
800
1000
1300
1·!·00
5•';•0
.!.50
750
1080
1150
FIN I 5H : 13 : 35
CALL
LETTER::.
NOI5E
NOI:::.E
Nor:::.E
t·Kti5E
t-lOI5E
E'..-'Ar:;
r::FoD
1-':AI'·IC
1-':AE:·N
t·iETEF::
F::EADINt::;
dE:·#
2·~·· 5(C~F·)
2r!• • 0 ( G!f=')
:2.!;. 5 ( r:;~t=·)
2•;:1
• 5 ( t)l=')
25. 0 ( G!F=')
20.5
22.5
24.0
20.0
19.0
* 5TATION CALL VERIFIED
ATTENUATOF:: ANTENNA
5ETTING FACTOR
,::!f:, dE:·
-40 3 1
;·. 0
-40 37.0
-40 37.0
-40 ~~ C" ·-'··· . ._,
-40 3;:::. 0
-40 3;::i. 0
-40 37.0
-40 -='"'? ·-··· .0
-40 37.0
:-40 ""':*""':l C" ·-f··· •. ._:
() COCHANNEL OR ADJACENT CHANNEL INTERFERENCE
? 5TATION NOT IDENTIFIED
# 5IGNAL I5 FIELD INTEN5ITY(FI)
NOI5E 15 f.!UA5I-PEAK(QP)
OE:·5EF:'..JED
5IGNAL HECEPT I Ot·i
5 TF::Et·iG TH G!UALIT'..-'
dE:· : 11J !.) •. ··'t·1
25.5
23.0
23.5
27.0
23.0
1 ;;:;. 5 E
1·;·. 5 c-'-
21.0 [I
17.0 E
1~~r• 5 E
5ITE 30
F"F::EG!UENCV
!-:.Hz
530
<:;00
1000
1300
1·:!:·00
5·50
5•7•0
·!·50
750
1150
*= 5TA'
() COC
·-::• 5TA1
# 5IGt
NOI;
RF SIGNAL STRENGTH AND
AMBIENT NOISE SURVEY
Feat==~
ALASKA POWER AUTHORITY
DATE: 7,.··'12,.··';;:; 1
:=.I TE 40
LANE CF::EEJ-:;
5TAFH: 10:30 OB5ERVER5: D. REYNOLD5
.J. TOF::F::I
f"HH5H: 11 :05
CALL
LETTER:.
t·iOI5E
NOI5E
NOI5E
NOI5E
NOI::·E
t-:;r.,.tot-:;
t-:;HAR
t-:;'lAt-:;
t-:;FC!D
t-=;ANC
t·iETEF::
READING
dNI:
27.0(G!P)
2·5. 5 ( (~J=·)
2r5 a 5 ( G!J=')
24. 5(G!P)
25. 0(G!P)
:20.5
22.0
25.0
31.0
:21.5
22.0
CALL 1...'Et=:: IF I ED
ATTENUATOR ANTENNA
5ETTING f"ACTOF::
.~e. de.
-40 3·;:·. 0
-40 "":1-:t .0 ·-1···
-40 37.0
-40 "":'..., c.-·-'··· . ·-'
-40 3;:i. 0
-40 3;:;. 5
-40 3i=i. 0
-40 37.0
-40 37.0
-40 37.0
-40 "':'-;t £:"'
._: •• • •• _J
4EL OR ADJACENT CHANNEL INTERFERENCE
NOT IDENTIFIED
[5 FIELD INTENSITY(f"I)
-· C!U1=!5 I -PEAt-:; ( G!P)
oe.5Et=::t . .JED
5IGNAL F::ECEPTION
5TRENt::lTH G!UALIT''i'
de.: 1rJ.t.J,/t·i
2·~·-0
23.5
23.5
22.0
23. :z,
1';'. 0 E
20.0 E
:22.0 E
2~=i. 0 c
1::;. 5 [I
1·;:·.5 E
SITE 40
RF SIGNAL STRENGTH AND
AMBIENT NOISE SURVEY
FC•t==:
ALASKA POWER AUTHORITY
DATE : 7,..-'12,.··';::.1 .
:::.ITE 50A
CUHF::\·'
F F::EG!UENC'y'
!-:.Hz
5TAFH: 15:10
FHH5H: 15:30
CALL
LETTER:.
530 NOI5E
e00 NOI5E
1000 NOI5E
1300 t·K!I5E
1·!·00 NO I 5E
r·iETEF::
F:~EADINC:~
dE!·#
27. 0 (I~~F·)
2::! .• 0(t~F·)
2t!r • 5 ( (;!F')
24.5(G!P)
25. 0(G!P)
20.0
* 5TATION CALL VERIFIED
:=1TTENUATOF::
5ETTING
dB
-40
-40
-40
-40
-40
-40
OB5EHUER5: D. REYNOLD5
._!. TOF:!F:! I
OE!·5EF::t..JED
ANTENNA 5IGNAL F::ECEPT I ON
FACTOR 5TF::ENGTH G!UALIT'l
de. dE!· : 1u1...' ,.··'t·1
3·;·. 0 z,!,. 0
37.0 23~0
37.0 23.5
37.5 22.0
3;:;. 0 23.0
""='..., .0 17.0 E ·-~ .. ·
() COCHANNEL OR ADJACENT CHANNEL INTERFERENCE
? 5TATION NOT IDENTIFIED
# 5IGNAL I5 FIELD INTEN5ITY(FI)
NOI5E IS QUA5I-PEAK(QP)
5ITE 50A
RF SIGNAL STRENGTH AND
AMBIENT NOISE SURVEY
F"C1s=;=
ALASKA POWER AUTHORITY
DATE: 7,.··'11,.··';:::1
::=.I TE .::::.0
CAtH~·~ELL
OB5ERUER5: D. REYNOLD5
._1. TORj:;: I
F"I=::EG~UENC'l
!-:.HZ
F"HH5H: u:;: 11
CALL
LETTER::.
530 t·KII5E
e•00 NOI5E
1000 NOI5E
1300 NOI5E
1600 NOI5E
1170 1-=:.JNP
t·1ETER
I=::EADING
df.#
27. 0(G!F')
2··5. 0(G'~F·)
27. 0 ( G!F=' )
24. 0(G!P)
25. 0(G!F=')
1 ·;~. 5
* STATION CALL UERIPIED
ATTENUATOI=:: At·HENNA
5ETTit·K, FACTO!=::
de. dE:·
-40 3•;:'. 0
-40 37.0
-40 37.0
-40 -=-~ c-·-···· . ·-'
-40 3t3. 0
-40 --:a -:r C" ·-···· .. _:
() COCHANNEL OR ADJACENT CHANNEL INTERFERENCE
? STATION NOT IDENTIFIED
# SIGNAL I5 FIELD INTEN5ITY(FI)
NOI5E I5 OUA5I-PEAK(QP)
oe.:::.EF::1...fED
5IGNAL RECEPTION
5TRENGTH OUALIT''i'
dE:·: 1 ut.J,.··'t-1
z.~ .. 0
23.0
24.0
21.!5
23.0
17.0 E
RF SIGNAL STRENGTH AND
AMBIENT NOISE SURVEY
FC•F==
ALA~KA POWER AUTHORITY
DATE : 7,.··'15,.···::: 1
:::.I TE 70
CA~:LO CHEE!-=;
5TA~:T: 11 :00 OB5ERUER5: D. REYNOLD5
._!. TOi=::FH
F~:EG!UENC\'
!-:.Hz
FINI5H: 11:15
CALL
LETTER:.
530 NOI5E
S00 NOI5E
1000 NOI5E
1300 NOI5E
1600 NOI5E
1170 t<;._INP
t·1ETE~:
~:EADINCl
df::·#
27. 0(C!P)
2a!aa @(G!F')
2~:s. 0 (G.! I=·)
24. 5(G!I=')
25.0(G!P)
·'":·""':' C" ..:..·-' .. _;.
i 5TATION CALL VERIFIED
ATTENUATO~: AtHENNA
5ETTINCl FACTO~:
de. ~e.
-40 3·;:·. 0
-40 -='-, .0 ·-····
-40 37.0
-40 -='~ z= ·-···· . ·-'
-40 3i:;. 0
-40 -=!~ c: ·-··· . ·-·
() COCHANNEL OR ADJACENT CHANNEL INTERFERENCE
? 5TATION NOT IDENTIFIED
# 5IGNAL I5 FIELD INTEN5ITY(FI)
NOI5E I5 QUA5I-PEAK(QP)
oe.::.ER 1...'ED
5IGNAL RECEPTION
5T~:ENGTH G!UALIT''I'
de. : 1 u t.J •. ··'t·1
2(~J. 0
23.0
23.0
22.0
23.0
21.0 E
5ITE 70
RF SIGNAL STRENGTH AND
AMBIENT NOISE SURV~Y
FC•F=~
ALASKA POWER AUTHORITY
::=.I TE •::::•0
DE NEt-=; I LAI<E
oe.5EP1..JEP5 : D. F::E'·r'NOLDS
._1. TOF::F:: I
FF::EC!UENC\'
~-:.Hz
FINISH: 13:30
C:ALL
LETTEr-:;5
530 NOISE
:;::00 ~·!0 I SE
1000 NOISE
!300 noi5E
1 .::;.00 NO I 5E
.~;~~~e t<~AF!
,;:·00 r::rF.:e.
·;·70 ;--:;rAt-!:
1170 t-=;.JNP
~·iETEJ=;:
F::EADING
::!E:#
·-=·..: ;::-C!P) ..... ,_,. ·-·
·":·C' 5 G!F') ..:..·-·.
25. ;::-G!i=') ·-'
24. C' G!F•) ·-' .-,.;::-0 C!P) ...... _:.
2'ZI.!ZI
1 . -. ;r • 0
i .-. ... ;r • 0
27. 5
:+: :::.TATION CALL !..JEP!FIED
ATTENUATOJ=;: ANTENNA
:;:.ETTING FACT OJ=;:
dE:· dE:·
-.a.i-0 3·;:·. 0
-40 "":1..., ._ ..... 0
-40 37.0
-40 -=="? 5 ·-··· .
-40 "":1·=· ._:._,. 0
-40 "":1..., ~1 ·-···· .
-40 37. 0
-40 -::--, ·-'··· . 0
-40 '":1-, ·-···· . C' ·-·
() COCHANNEL OR ADJACENT CHANNEL INTERFERENCE
? 5TRTION NOT IDENTIFIED
# 5IGNAL IS FIELD INTEN5ITY(FI)
~OISE IS QURSI-PEAK(QP)
OE:·5EJ=;:I..JED
5IGNAL J=;:ECEPTION
5TJ=;:ENGTH C!UALITV
de. . 1u. f.),.··' t·1 .
·":·;::" 5 .a:_._ ••
22. C' ·-·
22. 5
22. 0
23.0
17. 0 E
1 ·~=. 0 E
1~!·. 0 E
25. 0 [I
RF SIGNAL STRENGTH AND
RMBIENT NOISE SURUEV
FCIJ=;!
ALASKA POWER AUTHORITY
!:lATE: ? .. ··' 14,/::H
FF::EG!UENC'/
~=.Hz
530
;:;00
1000
1300
1600
5TAF::T: 14:40
F IN I 5H : 1 4 :55
CALL
LETTER:.
NOI::·E
t·10ISE
t·KriSE
NOI5E
NOISE
t·~ETEF::
F::EADING
27. 5 ( G~J=·)
z,:::t. er < G!f=')
2:~t. 5 ( G!f=•)
24~~ 5(G!F•)
25. 0(G!f=')
* STATION CALL VERIFIED
ATTENURTOR
5ETTING
-40
-40
-40
-40
-40
-=.I TE ·;:•0
t-K:t-:; I t·1LE\-' ' . .J I LLAG.E
OB5ERUERS: D. REYNOLDS
._!. TOF::F=: I
:~t-tTENNA
FACTOt::::
37.0
37.0
37.5
oe.5EF::1..JED
SIGNAL RECEPTION
STRENGTH QUALITY
dB : 1u1 • .J, .. ·'t·i
23.0
23.5
22.0
23.0
() COCHANNEL OR ADJACENT CHANNEL INTERFERENCE
? STATION NOT IDENTIFIED
# SIGNAL IS FIELD INTENSITY(FI)
NOI5E IS QUASI-PEAK(QP)
5ITE 90
RF SIGNAL STRENGTH AND
AMBIENT NOISE SURVEY
F"CtF:~
ALASKA POWER AUTHORITY
f'REG!UENC'l
!-:.Hz
530
:::00
1 •Zl00
1300
DRTE: 7,/14.-···::H
STAF::T: 12:10
;=-I t·i I :5H: 12 :22
~·1ETE!==: C:RLL
LETTER:. }:;:E:RDINC:.
t·~O ISE
~·lOISE
NOISE
HOISE
NOISE
dE:·#
..... 5(C!P ..:.. _,.
·"":·..: .a:..~-·. 0(G!C'
·"":·· ~~-~. 5(G!P
24. 5 (G!!='
•":•C' ..:...._:. €1 ( OP
* STATION CALL VERIFIED
r=lTTENURTOP
SETTINC:a
dE:·
-40
-40
-40
-40
-40
-=·ITE :100
t·iCI-:; I ~·~LE'-,-' PRPI-=;
OBSERUEPS: D. PEVNOLDS
.J. TOF::F:: I
At·nEt·iNR
FRCTOR
dE:·
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23.0
23.5
22.0
23.0
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? STATION NOT IDENTIFIED
# SIGNAL IS FIELD INTENS TV(FI)
NOISE IS QUASI-PERK(QP
SITE 100
RF SIGNAL STRENGTH AND
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:=.I TE: :1. :1. 0A
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? STATION NOT IDENTIFIED
# SIGNAL I5 FIELD INTENSITV(FI)
NOISE IS QUASI-PEAK(QP)
:=·ITE 110A
ALASKA POWER AUTHORITY
Existing Quality of Reception for AM Radio Stations
(Based on Field Measurements of Radio Station
Signal Strengths July 9-15, 1981)
Site
Number Location
Number of Radio Stations
Judged to have the following
Quality of Radio Reception
A B C D E
lO Willow 3 3
20 Trapper Creek 2 2 3
30 Chase l 4
40 Lane Creek l l 4
SOA Curry l
60 Cantwell l
70 Carlo Creek l
80 Deneki Lake l 3
90 McKinley Village
100 McKinley Park
llOA Healy l l
LEGEND:
A -Entirely Satisfactory
B -very Good, Background unobtrusive
C -Fairly Satisfactory, Background Plainly Evident
D -Background very Evident, Speech Understandable Hith
Concentrating
E -Speech Unintelligible
•:S:• ......
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MEASURED RADIO FREQUENCY
SIGNAL STRENGTH <dBu>
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SITE 70
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SIGNAL STRENGTH <dBu>
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TV STATIONS RECEIVED
ALASKA POWER AUTHORITY
Operating Antenna
Power-kW Height-Feet
Visual/Aural AT/AG
2 KENI Anchorage 26.9/2.69 70/173
2 KFAR Fairbanks 5.37/.676 45/200
2 Cantwell Translator at
Earth Station Operated by
Alaska Department of
Highways
4 K04CO Healy Translator
(Primary Ch. 11 KTVF
Fairbanks)
4 K04DO Talkeetna Translator
(Primary Ch. 11 Anchorage)
6 K06KG Talkeetna Translator
(Primary Ch. 13 Anchorage)
*7 KAKM Anchorage 105/20.90 14 3/250
7 K07ND Healy Translator
(Primary Ch. 9 Fairbanks)
9 KUAC Fairbanks 46.7/1.16 200/255
9 K0900 Talkeetna Translator
(Primary Ch. 2 Anchorage)
11 KTVA Anchorage 26.3/5.35 300/391
13 KIMO Anchorage 30/6.17 90/347
13 Healy Translator
AT -Above average terrain
AG -Above ground
* -Non-commercial educational station
CHANNEL
2
'5
7
11
13
TV SIGNRL STRENGTH AND
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FC•F==
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FINISH: 1 ;=j: 30
CALL t·1ETER+: ATTEt-~. ANTENNA CAE:·LE SIGNAL* At·1E:· I ENT AUDIO
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DATE: 7,.··'12,.··'0::1
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CHANNEL
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TV SIGNAL STRENGTH AND
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r c• s::;;~
ALA~KA POWER AUTHORITY
DATE: 7,.··'12,.··';31
5TAt=::T: 15:40
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DATE: 7,.··'11,.··'81
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DATE: 7,.··'1S,.··'e1
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DATE : 7 , . ..'15/81
:=.TAFn: 13:40
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CHANNEL
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TV SIGNAL STRENGTH AND
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DATE: 7,.··'14,.··'81
5TAFH: 15:00
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DATE: 7,.··'14,.··';:H
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SITE 100
CHANNEL
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7
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DATE: 7,.··'13,.··'S1
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5ITE 110A
ALASKA POWER AUTHORITY
Existing Quality of Television Reception (Audio)
(Based on Field Measurements of Radio Station
Signal Strengths July 9-15, 1981)
Site
Number Location
Number of TV Signals
Judged to have the following
Quality of Audio Reception
A B C D E
10 Willow
20 Trapper Creek
30 Chase
40 Lane Creek
SOA Curry
60 Cantwell
70 Carlo Creek
80 Deneki Lake
90 McKinley Village
100 McKinley Park
llOA Healy
A -Entirely Satisfactory
3
1
2
2
1
2
B -very Good, Background unobtrusive
1
1 1
1
1 1
C -Fairly Satisfactory, Background Plainly Evident
1
3
3
1
1
D -Background very Evident, Speech Understandable With
Concentrating
E -Speech Unintelligible
1
2
1
1
1
2
1
> "'tJ
"'tJ m z c
X
OJ
APPENDIX B
COMMUNICATION TOWER SURVEY
ALASKA POWER AUTHORITY
SCOPE • • • • • •
APPENDIX B
TABLE OF CONTENTS
. . . . . . . . .
RECOMMENDATIONS • • • • •
INTRODUCTION • • • • • • • •
. . . . . . . .
. .
COMMUNICATION FACILITIES . . . . . . . . . . . .
CLEARANCE CRITERIA . . . . . . . . . . . . . . . . .
FM TRANSLATOR FACILITIES • . . . . .
TELEVISION TRANSLATOR FACILITIES • . . . . .
EARTH STATIONS • . . . . . . . . . . . . . .
AIR NAVIGATIONAL AIDS . . . . . . . . . . .
NAVAIDS (Enroute) . . . . . . . . . . . . .
Page
B-1
B-1
B-1
B-3
B-4
B-4
B-5
B-5
B-6
B-6
Nondirectional Radio Beacons (NDB) • • • • B-6
Remote Center Air Ground (RCAG} Facilities. B-6
Single Frequency Outlets (SFO} • • • • • • B-7
Simultaneous Single Frequency Outlets (SSFO) B-7
NAVAIDS (At Airports) • • • • • • • • • • • B-7
VOR Stations . . . . . . . . . . . . .
Unicorns • • • • . . . . . .
Remote Communications Outlets (RCO}
Flight Service Stations (FSS) ••••
Airport Advisory Services (AAS) ••••••
Airport Landing Alert Systems (ALAS} ••
POINT-TO-POINT MICROWAVE • • • • • • • • • • • •
RESULTS • •
REFERENCES
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
EXHIBITS . . . . . . . . . . . . . . .
. . . .
. . .
. . .
B-8
B-8
B-9
B-9
B-9
B-9
B-10
B-11
B-12
B-13
COMMUNICATION TOWER SURVEY
ALASKA POWER AUTHORITY
SCOPE
The results of an investigation of radio communications
towers licensed to business and governmental agencies in
the study area between Willow and Healy, Alaska are pre-
sented in this Appendix. A total of 50 towers have been
identified including microwave relay facilities, TV trans-
lators, FM translators, earth stations and air navigational
aides. Also presented are the minimum recommended separa-
tions between the 345 kV intertie and these towers.
RECOMMENDATIONS
It is recommended that the minimum separation distances
summarized in Table B-3 be observed between the communication
towers identified in this appendix and the edge of the
right-of-way of the intertie. Actual locations of the
communication towers near the final line route will be
verified using aerial photographs of the route at the time
the transmission line centerline is established.
INTRODUCTION
In the past, EHV transmission lines have been reported to
cause interference to certain types of communication facili-
ties. This interference is not limited to electromagnetic
interference resulting from conductor corona. Rather such
interference has been caused by the physical presence of
B-1
tall metallic transmission line structures, shield wires
and, in some cases, phase conductors. Such interference
occurred even when transmission lines were deenergized.
Both clearance criteria and mitigative techniques have been
developed to successfully resolve most of these types of
interference.
In routing the intertie, it then becomes desirable to iden-
tify those situations where a proposed route may cause such
interference. Necessary corrective measures can be imple-
mented prior to the construction of the intertie thereby
minimizing the impact on communication facilities.
APA authorized CAI to perform a study of the commercial radio
communication facilities near the proposed 345 kV intertie.
The radio communication facilities identified in this study are:
FM Translators
TV Translators
Earth Stations
Air Navigational Aids
Point-to-Point Microwave
The primary sources of technical data on these communication
facilities include various bureaus of the Federal Communi-
cation Commission (FCC), the Federal Aviation Administration,
Alascom, Inc. the Alaska Railroad, the Golden Valley Electric
Association and the Matanuska Telephone Association. These
sources were supplemented by Federal Aviation Administration
Aeronautical Charts and United States Geological Service
Maps and field surveys by both Dryden & LaRue and Commonwealth.
B-2
These sources of technical data are the best available.
However, it is Commonwealth's experience that the actual
location of the communication towers may be slightly dif-
ferent from that shown in the technical data. For example,
the smallest unit of longitude shown in the technical data
is normally integer seconds. A deviation of 0.5 seconds
(longitude) between an actual tower location and the techni-
cal data can result in a difference of about 50 feet.
Commonwealth will verify the actual locations of the communi-
cation towers near the final line route using aerial photo-
graphs of the route at the time the transmission line center-
line is established.
COMMUNICATION FACILITIES
The following types of communications facilities were
identified in this study:
1. FM Translators
2. TV Translators
3. Earth Stations
4. Air NAVAIDS Not Located at Airports
a. Nondirectional Radio Beacons
b. Remote Center Air Ground Facilities
c. Single Frequency Outlets
d. Simultaneous Single Frequency Outlets
5. Air NAVAIDS Located at Airports
a. VOR Stations
b. Unicorns
c. Remote Communications Outlets
d. Flight Service Stations
e. Airport Advisory Services
f. Airport Landing Alert Systems
6. Common Carrier and Point-to-Point Microwave
B-3
The following types of communication facilities were
excluded in this study:
1. Police and Sheriff 2-Way Radio
2. Private 2-Way Radio
3. Amateur Radio and Citizens Band
4. Classified Government Frequency Assignments
5. Telephone, Telegraph and Other Wire Facilities
CLEARANCE CRITERIA
A summary of the clearance criteria for the different
communication towers identified in the study area is tabu-
lated in Table B-1.
FM TRANSLATOR FACILITIES
FM translator facilities are licensed by the FCC to receive
an FM station and to rebroadcast the FM program on a different
FM frequency. To date, EHV tower and conductor impacts on
FM transmitting antennas have not been reported.
The minimum spacing between FM transmitting antennas and
the EHV right-of-way is recommended to be the FM antenna
structure height plus 200 feet. If the FM antenna were to
topple, it would topple so that neither the antenna nor guy
wires would be expected to fall on the right-of-way. Also
sufficient clearance would be provided for established main-
tenance practices on the guying anchors for the broadcast
tower.
B-4
TELEVISION TRANSLATOR FACILITIES
TV translator facilities are licensed by the FCC to receive
a TV signal and to rebroadcast the TV program on a different
TV channel. No effects of EHV lines on television trans-
mitting antennas have been reported. Again, the clearance
criteria is the antenna structure height plus 200 feet.
There may be an impact of the EHV towers on television
reception due to reflections from the EHV towers which can
cause ghost images (multiple images) to appear on the
television screen. Modification or improvement of the
receiving TV antenna system is the preferred method of
correcting ghosting problems. Such problems must be con-
sidered on a case by case basis.
EARTH STATIONS
Earth Stations are licensed by the FCC to provide communica-
tion service from a geostationary satellite. Operating at
frequencies in the 1 GHz or 6 GHz band, earth stations are
normally unaffected by 345 kV lines. Located at approximately
61° N latitude, earth stations in Alaska have low zeniths,
approximately 19° above the horizon. For proper operation
it is necessary that the line of sight link between the earth
station antenna and the satellite does not pass through or
near the transmission line structures. Therefore the minimum
separation between the line route and the earth station is
recommended to be 1000 feet (approximately 10 tower heights).
B-5
AIR NAVIGATIONAL AIDS
Air Navigational Aids (NAVAIDS) are radio facilities used
by government, commercial and private airplane pilots for
communication, data logging, positioning and other informa-
tion exchange. Many types of Air Navigational Aids are in
use in the study area.
NAVAIDS (Enroute)
In selected cases NAVAIDS are not located at airports. Such
NAVAIDS are located throughout the countryside to provide a
blanket of electronic aids to pilots and controllers.
Nondirectional Radio Beacons (NDB)
These omnibeacons are used by pilots for navigation
fixes or homing points. The nondirectional signal has a
frequency range of 200-400 kHz in 3 power ranges: MH -less
than 50 watts, H -50 to 2000 watts, and HH -more than 2000
watts. The airborne equipment generally consists of a radio
direction finder, a loop antenna and a sense antenna. The
FAA recommends a minimum clearance of 1000 feet to tall
metallic structures such as transmission towers.
Remote Center Air Ground (RCAG) Facilities
The RCAG Facilities extend the communications coverage of
Air Route Traffic Control Centers. The voice signal from
the Controller is generally carried over telephone lines to
a RCAG site where it is transmitted (AM) in the range of
123.6-128.8 MHz or 132.05-135.95 MHz at 10 or 50 watts. When
telephone lines are not used for the ground link, an FM
B-6
link (between 162 MHz and 174 MHz) or an alternate FM UHF link
(between 406 MHz and 420 MHz) is used. These directional
signals normally have a transmitted power of up to 50 watts.
Effects from EHV lines have not been reported by the FAA.
The FAA recommended clearance is 1000 feet to tall metallic
structures such as transmission towers.
Single Frequency Outlets (SFO)
At or near airports with no control towers, the FAA can
authorize an SFO air-to-ground facility to tie in with a
remote Air Traffic Control Tower communications. SFO
operates on a frequency between 118-136 MHz and has a non-
directional AM signal using a normal transmitter power of 10
watts. For an SFO not located at an airport the FAA recom-
mends a minimum 1000 foot separation to tall metallic struc-
tures such as transmission towers.
The ground link used for a SFO is identical with the ground
link for a Remote Communications Outlet (see RCO).
Simultaneous Single Frequency Outlets (SSFO)
A SSFO is a low-powered battery-operated Single Frequency
Outlet (unique to Alaska). Refer to the section on SFOs for
characteristics of this system.
NAVAIDS (At Airports)
The air NAVAIDS located at airports in the study area include
the facilities listed under Airport NAVAIDS in Table B-1. For
most applications the minimum spacing criteria for EHV lines
B-7
(from airports) requires a maximum slope of 1.5° from the air-
port to the top of the EHV tower. This criteria generally
will provide sufficient separation resulting in insignifi-
cant impact on NAVAIDS located at airports.
VOR Stations
The VOR station is the standard very High Frequency Omni
Range electronic direction finder in common use today. The
VOR system consists of a 200 watt ground transmitter and
airborne receiving equipment. Two signals are transmitted
on a 110-118 mHz carrier: 1) a frequency modulating reference
phase 30 Hz signal and 2) a space amplitude modulating
variable phase 30 Hz signal. With proper phasing of the
reference and variable signals, the airborne equipment can
determine the azimuth from the plane to the transmitting
site.
Unicorns
A Unicorn is a nongovernment air-to-ground radio communica-
tions facility providing private air-to-ground communications
and, at certain airports, airport advisory services. Unicorns
are licensed by the Aviation Marine Branch of the Federal
Communications Commission. At airports with no control
towers, one of three frequencies (122.7 MHz, 122.8 MHz or 123.0
MHz) is used. At airports with control towers a frequency
of 122.95 MHz is normally used. The nondirectional vertically
polarized signals are amplitude modulated. The broadcast
power is normally 10 watts.
B-8
Remote Communications Outlets (RCO)
At airports with no control towers, a Remote Communications
Outlet may be authorized by the FAA to provide local Flight
Service Station (FSS) service from a remote location. These
nondirectional signals have a frequency range between 118-
136 MHz, are amplitude modulated and normally have a trans-
mitted power level of 10 watts.
Voice channels between an RCO and an FSS may be over
telephone lines or a directional VHF link. This link has
a frequency range of 162-174 MHz and is frequency modulated.
Flight Service Stations (FSS}
At airports with control towers, air-to-ground communication
for a Flight Service Station may be authorized by the FAA.
Services of the FSS include change of flight plans and reports
of weather conditions along a flight route. A nondirectional
signal having a frequency between 122.0-122.6 MHz is amplitude
modulated. Normal broadcast power is 10 watts.
Airport Advisory Services (AAS}
Airports, having an FSS, may also be authorized by the FAA
to provide an Airport Advisory Service. This air-to-ground
communications is used for aircraft landings and takeoffs.
The nondirectional AM signal has a frequency of 123.6 MHz
from a 10 watt transmitter.
Airport Landing Alert Systems (ALAS}
At airports with no control towers or when the control tower
is unmanned, the FAA can authorize an ALAS, an air-to-
ground communication link. A pilot can key a frequency
B-9
between 118-136 MHz, a predetermined number of times to
cause the airfield lights to turn on. At the airport only
a receiver is used for this communications link.
POINT-TO-POINT MICROWAVE
All tall metallic structures including 345 kV transmission
line towers may affect microwave beams. While literature
discussing such effects is scarce, it is standard practice
for microwave facility suppliers and microwave routing
engineers to avoid placing a microwave path through a trans-
mission line tower. The general routing criteria for a
microwave beam is to provide a minimum spacing of six-tenths
of the radius of the first fresnel zone [Reference B-1] from
path to obstacle. Because of the considerations made in
microwave routing, it is appropriate that APA make similar
considerations in transmission line route selection.
This survey of microwave beams considers a two dimensional
model with the understanding that the elevation of the
microwave beams may be higher than the transmission line. The
licensees of the facilities normally have completed path-
profiles for each microwave beam to determine the minimum
clearance required between the beam and both the natural
topography and existing man-made objects. Using these path-
profiles, these licensees should be able to easily determine
whether sufficient clearance exists between their microwave
beams and the proposed transmission lines.
The minimum horizontal separation recommended between a
microwave tower and the 345 kV line is the height of the
microwave tower plus 200 feet. This is a distance based on
physical parameters rather than microwave beam degradation.
B-10
RESULTS
A total of 50 commercial communications towers have been
identified in the study area (Figure B-1). A summary of
these towers is provided in Table B-2, Sheets 1-8. Included
in this summary for each tower is the licensee, site name,
licensing agency, location, site elevation, antenna height,
the type and call letters (when available), frequency, power
and the receiving targets of the facility.
The recommended separations between the commercial communi-
cations towers and the edge of the right-of-way of the 345 kV
intertie are summarized in Table B-3, Sheets 1-4.
The Federal Aviation Administration and the Licenses of
Microwave Facilities and Earth Stations have received copies
of this Appendix for review and comments. A record of per-
tinent correspondence in this matter follows Table B-3.
B-11
REFERENCES
B-1 Engineering Considerations for Microwave Communications
Systems. GET Lenkurt, San Carlos, California, June, 1970.
B-2 VOR/VORTAC Siting Criteria, 6700.11, Federal Aviation
Administration, Department of Transportation, washington,
D.C., August 7, 1968.
B-12
p.. -~~---.-·: ,,--· I . vW..,.. ~ ,._.,_. ·. fl'loo... ...,.,.,.,.t "'
• _ -~ -Mofltl\•.-bt,.,.
::::-"' ....... :
.......
"
. ·-
1
f \
R .7W. I
....
-~-
<"~..,. .....
.... -_*"
l Air-
+ T ovver Locatio n
(!) Tovv e r No. S ee T a bl e B -2
Microvvave Be a ms
Lin e Route
'-----------------=:A:::.:I=.a s~k:::::a~P:.....:o::..:'W=er:....:A:::.u=.:t::.:h:.:::o~ri..:..!...tv] ANCHORAGE FAIRBANKS TRANSMISSION I NTERTI E
0 1 0 2 0 Miles J
0 1 0 20 K ilo m e t e r s
~ G ilbe rt/Commo nw ealth North
Communication T ovvers
TABLE B-1
POSSIBLE EHV LINE EFFECTS ON COMMUNICATIONS FACILITIES
AND RECOMMENDED MINIMUM CLEARANCES
c::
0 0 ·.-I c:: '0 "0 +J +J c: 0 c:: <V <V cU 0 ·.-I 0 +J '0 <V Ul c:: C) >. ·.-f +J ·.-I Ol l-1 c: C) <V 0 ·.-f +J +J u +J c:: 0 Ul <V E c: C: ·.-f c:: ·.-f C) :ij 0. ·.-I C..+J E :l :ij ·.-f l-1 :l.--t <V l-1 l-1 +J <V C) E E l-1 ...::I <V E . .-~ .--f 4-l 0 Ul 0:: <V 0 ·.-f cU +J E c.> 4-l 4-l Ul 0 4-1 UC::<V!> ·.-f 0 it! <V ·.-I ..a ..c: 04-l <V ·.-1 .--f ::r: l-1 urx.. 0:: Q ~ c.!) :z~ o:::zu~ u
FM Translator X Antenna Height Antenna Toppling
plus 200 feet Guy Anchor
Maintenance
TV Translator X X X Antenna Height Antenna Toppling
Plus 200 feet Guy Anchor
Maintenance
Earth Stations 10 Tower Height See Text
NAVAIDS
(Enroute)
NDB X 1000 feet FAA
RCAG X 1000 feet FAA
SFO X 1000 feet FAA
SSFO X 1000 feet FAA
NAVAIDS
(At Airports) 1.5° DOT/FAA
VOR X l. so Ref. B-2
Unicorn X Airport
Criterion
RCO X Airport
Criterion
FSS X Airport
Criterion
AAS X Airport
Criterion
ALAS X Airport
Criterion
point-to-Point X X X Antenna Height Antenna Toppling
Microwave Plus 200 feet Guy Anchor
Maintenance
See Text 0.6 First Fresnel
Zone
COMMUNICATION TOWER SURVEY
ALASKA POWER AUTHORITY
345 KV INTERTIE
Licensee
Tower (Site Name) Latitude N Longitude w Site El. Tower Ht.
_il_ (Bureau) Near Mun ic ipali t;t Ft. AMSL Feet
1 Alas com Inc. 6P 46' 20" 149° 45' 06" 1450 175
(Twelve Mile)
(Common Carrier) 14 Miles east of Willow
2 Alas com Inc. 62° 19' 07" 150° 17' 55" 450 150
(Scotty Lake)
(Common Carrier) Trapper Creek
3 Alas com Inc. 62° 19' 57" 150° Ol' 57" 480 75
(Bartlett Earth
Station)
(Common Carrier) Talkeetna
4 Alascom Inc. 62° 41' 20" 150° 13' 50" 1216 130
(Byers Creek)
(Common Carrier) Byers Lake
5 Alas com Inc. 63° 05' 41" 149° 30' 18" 1910 233
(Honolulu)
(Common Carrier) Honolulu
6 Alas com Inc. 63° 24' 14" 148° 50' 31" 3643 45
(Reindeer Hill #2)
(Common Carrier) Cantwell
7 Alas com Inc. 63° 24' 04" 148° 56 1 16" 2644 61
(Cantwell)
(Common Carrier) Cantwell
LEGEND: AMSL -Above Mean Sea Level
MTA -Matanuska Telephone Association
Facility Frequency
(T:tee> (Power)
WAD94
(Microwave)
WAD95
(Microwave)
WAD93
(Microwave)
WQQ87
(Microwave)
WQQ86
(Microwave)
Reindeer 2PV
(Microwave)
Passive
Reflector
WQQ80
(Microwave)
~'ABLE B-2
SHEET l of 8
Sept. 18, 1981
Target
Microwave to Tower 2
Microwave to Tower 17
(MTA only)
Microwave to Tower 1
Microwave to Tower 3
Microwave to Tower 4
Microwave to Tower 2
Microwave to Tower 2
Microwave to Tower 5
Microwave to Tower 4
Microwave to Tower 6
Microwave to Tower 5
Microwave to Tower 7
Microwave to Tower 6
Microwave to Tower 8
Tower
-*-
8
9
10
11
12
13
14
Licensee
(Site Name)
(Bureau)
Alascom Inc.
(Reindeer Hill jfl)
(Common Carrier)
Alascom Inc.
(McKinley Village)
(Common Carrier)
Alascom Inc.
(Healy)
(Common Carrier)
Alascom Inc.
(Birch Creek)
(Common Carrier)
Golden Valley Ele.
(Private Radio)
Golden Valley Ele.
(Sugar Loaf)
(Private Radio)
Golden Valley Ele.
(Healy Power Plant)
(Private Radio)
COMMUNICATION TOWER SURVEY
ALASKA POWER AUTHORITY
345 KV INTERTIE
Latitude N Longitude W Site El. Tower Ht.
Near Municipality Ft. AMSL Feet
63 ° 24 I 34" 148° 50 I 58" 3238 45
Cantwell
63° 38' 37" 148° 47' 00" 2162 98
McKinley Village
63° 50' 16" 148° 58' 41" 1914 205
Healy
64° 10' 14" 149° 17' 43" 983 125
Birch Creek
64° 52' 47" 148° 03' 20" 2364 80
Ester Dome
63° 47' 25" 148° 52' 18" 4500 28
Sugar Loaf Mountain, Healy
63° 51' 21" 148° 57' 00" 1272 80
Healy
LEGEND: AMSL -Above Mean Sea Level
MTA -Matanuska Electric Association
Facility
(Type)
Reindeer lPV
(Microwave)
Passive
Reflector
WQQ81
(Microwave
WQQ82
(Microwave)
WQQ83
(Microwave)
WJI92
(Microwave)
WJI93
(Microwave
Frequency
(Power)
956.0 MHZ
(10 W)
957.6 MHZ
(lOW)
959.6 MHZ
(10 W)
WJI94 954.0 MHZ
(Microwave) (10 W)
TABLE B-2
SHEET 2 of 8
Sept. 18, 1981
Target
Microwave to Tower 7
Microwave to Tower 9
Microwave to Tower 8
Microwave to Tower 10
(Only MTA)
Microwave to Tower 15
(Shared with MTA)
Microwave to Tower 9
(Only MTA)
Microwave to Tower 11
(Shared with MTA)
Microwave to Tower 10
(Shared with MTA)
Microwave to Tower 13
Microwave to Tower 12
Microwave to Tower 14
Microwave to Tower 13
Tower
_#_
15
16
17
18
19
20
21
Licensee
(Site Name)
(Bureau)
Matanuska Telephone
Association
(McKinley Park)
(Common Carrier)
Matanuska Telephone
Association
(Bald Mountain)
(Common Carrier)
Matanuska Telephone
Association
(Talkeetna)
(Common Carrier)
Alaska Railroad
(Talkeetna)
(IRAC)
Alaska Railroad
(Summit)
(IRAC)
Alaska Railroad
(Chalitna Hwy.
Camp)
(IRAC)
Alaska Railroad
(Byers Lake)
(IRAC)
COMMUNICATION TOWER SURVEY
ALASKA POWER AUTHORITY
345 KV INTERTIE
Latitude N Longitude W Site El. Tower Ht.
Near Municipality Ft. AMSL Feet
63° 43 I 59" 148° 54' 56"
McKinley Park
62° 18' 30" 149° 45 1 07"
12 Miles east of Talkeetna
62° 19' 19" 150° 06' 54"
Talkeetna (Central Office)
62° 19 1 48" 150° 06 1 48"
Talkeetna
61° 15 1 31" 149° 31 1 37"
Anchorage
62° 24 1 10" 150° 15' 08"
Trapper Creek
62° 41' 17" 150° 13' 34"
1753
3300
346
340
3850
550
1400
33
30
100
90
60
30
160
100
100
30
30
LEGEND: AMSL -Above Mean Sea Level
IRAC -Interdepartment Radio Advisory Committee
Facility
(Type)
WAS480
(Microwave)
(Microwave)
Frequency
(Power)
TABLE B-2
SHEET 3 of 8
Sept. 18, 1981
Target
Microwave to Tower 9
(Shared with Alascom)
2GHz Digital Microwave to Tower 17
2 GHz Digital Microwave to Tower 16
(Microwave) 2 GHz Digital Microwave to Tower 2
2.202 GHz Microwave to Tower 20
(Microwave) (3 Watts)
1.776 GHz Microwave to Tower 20
(Microwave) (10 Watts)
2.2565 GHz Microwave to Tower 18
(Microwave) (3 Watts)
l. 716 GHz Microwave to Tower 19
(10 Watts)
l. 746 GHz Microwave to Tower 21
(5 Watts)
1.806 GHz Microwave to Tower 20
(Microwave) (10 Watts)
l. 746 GHz Microwave to Tower 22
(10 Watts)
Tl'.BLE B-2
S HEC:T 4 of 8
Sept. 18, 1981
COMMUNICATION TOWER SURVEY
ALASKA POWER AUTHORITY
345 KV INTERTIE
Licensee
Tower (Site Name) Latitude N Longitude W Site El. Tower Ht. Facility Frequency Target
_#_ (Bureau) Near Mun ic ipali t;r: Ft. AMSL Feet (T;r:eel (Power)
22 Alaska Railroad 62° 58' 40" 149° 38' 47" 1600 100 1.806 GHz Microwave to Tower 21
(Hurricane) (Microwave) (5 Watts)
(IRAC) Hurricane 155 1.776 GHz Microwave to Tower 24
(5 Watts)
Microwave to Tower 23
23 Alaska Railroad Microwave to Tower 22
To Gold Creek, south of Hurricane (Microwave)
(IRAC) Future Site
24 Alaska Railroad 1.716 GHz Microwave to Tower 22
(Microwave) (0.1 Watts)
(IRAC) Future site 1.776 GHz Microwave to Tower 25
(0.1 Watts)
25 Alaska Railroad 63 ° 24 I 13" 148° 50' 23" 3500 40 1. 716 GHz Microwave to Tower 24
(Cantwell/Reindeer) (Microwave) (5 Watts)
(IRAC) Cantwell 30 2.2565 GHz Microwave to Tower 26
(5 Watts)
26 Alaska Railroad 63° 39' 17" 148° 46 I 41" 2515 25 2.205 GHz Microwave to Tower 25
(Yanert) (Microwave) (0.1 Watts)
(IRAC) Yanert 25 2.2565 GHz Microwave to Tower 27
(0.1 Watts)
27 Alaska Railroad 63° 43' 58" 148° 54' 30" 1753 30 2.205 GHz Microwave to Tower 26
(McKinley Park) (Microwave) (5 Watts)
(IRAC) McKinley Park 30 1.746 GHz Microwave to Tower 28
(5 Watts)
28 Alaska Railroad 63° 44 I 40" 148° 53' 00" 2050 8 l. 806 GHz Microwave to Tower 27
(Horseshoe Passive) 8 (Microwave) l. 746 GHz Microwave to Tower 29
(IRAC) Horseshoe Pass Passive
Reflector
LEGEND: AMSL -Above Mean Sea Level
IRAC -Interdepartment Radio Advisory Committee
Tower
_II_
29
30
31
32
33
34
Licensee
(Site Name)
(Bureau)
Alaska Rai 1 road
(Garner)
(IRAC)
Alaska Railroad
(Healy)
(IRAC)
Alaska Railroad
(Browne)
(IRAC)
(Broadcast)
Alaska Public TV
(Broadcast)
Northern TV Inc.
(Broadcast)
COMMUNICATION TOWER SURVEY
ALASKA POWER AUTHORITY
345 KV INTERTIE
Latitude N Longitude W Site El. Tower Ht.
Near Municipality Ft. AMSL Feet
63° 50' 13" 148° 59' 30"
Garner
63° 51' 15" 148° 58' 44"
64° 10' 30" 149° 19' 00"
Browne
62° 17' 56" 150° 06' 25"
Talkeetna
62° 18' 02" 150° 05' 52"
(Application for Construction
Permit)
Talkeetna
62° 18' 00" 150° 05' 36"
Talkeetna
1900 75
50
90
1459 40
1200 25
31
LEGEND: AMSL -Above Mean Sea Level
IRAC -Interdepartment Radio Advisory Committee
Facility Frequency
(T:a~e) (Power)
1.806 GHz
(Microwave) (5 Watts)
2.2565 GHz
(0.25 Watts)
l. 716 GHz
(5 Watts)
2.202 GHz
(Microwave) (0.25 Watts)
1.776 GHz
(Microwave) (0.10 Watts
K0900
(TV
Translator)
(TV
Translator)
K04DO
(TV
Translator)
Primary -
Channel 2
Operate -
Channel 9
Primary -
Channel 7
Operate -
Channel 47
Primary -
Channel 11
Operate -
Channel 4
(1 Watt)
TABLI..; ll-2
SHEET 5 of 8
Sept. 18, 1981
Target
Microwave to Tower 28
Microwave to Tower 30
Microwave to Tower 31
Microwave to Tower 29
Microwave to Tower 29
TAbLE B-2
SHEET 6 of 8
Sept. 18, 1981
COMMUNICATION TOWER SURVEY
ALASKA POWER AUTHORITY
345 KV INTERTIE
Licensee
Tower (Site Name) Latitude N Longitude w Site El. Tower Ht. Facility Frequency Target
_#_ (Bureau) Near Municiealit;t Ft. AMSL Feet {T:tee> (Power)
35 Talkeetna Chamber
of Commerce 62° 18' 00" 150° 06. 12" 15 K06KG Primary -
(TV Channel 13
(Broadcast) Talkeetna Translator) Operate -
Channel 6
36 Alaska Dept. of
Highways 63° 23' 14" 148° 52' 32" Rebroadcast Channel 2
Channel 2 (10 Watts)
(Broadcast) Cantwell (Earth Station)
37 63° 52' 30" 148° 51' 00" 2550 40 K269AD Primary -
(FM Channel 284
(Broadcast) Healy Translator) (KUAC-FM)
Operate -
Channel 269
38 Alaska Public
Broadcasting 63° 50' 13" 148° 58 1 38"
Application for Construction (TV
Permit Translator)
(Broadcast) Healy
39 KUAC-TV 63° 52' 30" 148° 51' 00" 2550 30 K07ND Primary -
(TV Channel 9
Translator) (KUAC-TV)
(Broadcast) Healy Operate -
Channel 7
40 Northern TV Inc. 63° 52' 30" 148° 51' 00" 2550 25 K04CO Primary -
(TV Channel 11
Translator) (KTVF-TV)
(Broadcast) Healy/Suntrana/Usibelli Operate -
Channel 4
LEGEND: AMSL -Above Mean Sea Level
Tower
_#_
41
42
43
44
45
46
47
FAA
Licensee
(Site Name)
(Bureau)
Montana Creek Airport
COMMUNICATION TOWER SURVEY
ALASKA POWER AUTHORITY
345 KV INTERTIE
Latitude N Longitude W Site El. Tower Ht.
Near Municipality Ft. AMSL Feet
62° 04 I 18" 150° 04 I 00" 250
(IRAC) Montana Creek
FAA
Talkeetna Airport
(IRAC)
FAA
VOR Station
(IRAC)
FAA
( IRAC)
FAA
Summit Airport
(IRAC)
FAA
Golden North Airport
( IRAC)
FAA
Cantwell SSFO
( IRAC)
62° 19' 27" 150° 05 I 30 11 358
Talkeetna
62° 18' 00" 150° 06' 12" 358
Talkeetna
62° 19' 54" 150° 05' 42"
Peters Creek
63° 19' 54" 149° 07' 30" 2409
Summit
63° 22' 18" 148° 50' 54" 2250
Cantwell
63° 24 I 00" 148° 56' 18" 2525
Cantwell
Facility
(Type)
(Unicorn)
(Unicom)
(FSS)
(AAS)
(ALAS)
(RCO)
(VOR)
(NOB)
(RCO)
(NOB)
(Unicorn)
(SSFO)
Frequency
(Power)
122.8 MHZ
123.0 MHZ
122.2 MHZ
123.6 MHZ
123.6 MHz(r)
122.2 MHZ
121.5 MHZ(R)
116.2 MHz(T)
116.2 MHZ
305 KUz
122.6 MHz
326 kHz
122.8 MHZ
122.5 MHz
TABLE B-2
SHEET 7 of 8
Sept. 18, 1981
Target
Talkeetna Airport(FSS)
Anchorage FSS
Anchorage FSS
Anchorage FSS
Anchorage FSS
LEGEND: AMSL -Above Mean Sea Level NOB -Non Directional Radio Beacon (Navigational Aid)
RCO -Remote Communications Outlet AAS -Airport Advisory Service
FAA -Federal Aviation Administration
FSS -Flight Service Station
IRAC -Interdepartment Radio Advisory Committee
SSFO -Simultaneous Single Frequency Outlet (Air-Ground Communications)
VOR -very High Frequency Omni Range (Navigational Aid)
TABLE B-2
SHEET 8 of 8
sept. 18, 1981
COMMUNICATION TOWER SURVEY
34 5 KV INTERTIE
Tower
_#_
48
49
so
FAA
Licensee
(Site Name)
(Bureau)
McKinley Park
Airport
(IRAC)
FAA
McKinley Park SSFO
(IRAC)
FAA
Healy River SFO
( IRAC)
Latitude N Longitude W
Near Municipality
63° 44 1 00" 148° 54 I 30"
McKinley Park
63° 38 1 36" 148° 47 1 00"
McKinley Park
63° 50 I 00" 149° 00 I 00"
Healy
LEGEND: ALAS -Airport Landing Alert Service
AMSL -Above Mean Sea Level
FAA -Federal Aviation Administration
FSS -Flight Service Station
Site El.
Ft. AMSL
1720
1294
Tower Ht.
Feet
Facility
(Type)
(ALAS)
(SSFO)
(SFO)
Frequency
(Power)
122.8 MHZ
122.1 MHz
122.4 MHZ
IRAC -Interdepartment Radio Advisory Committee
Target
Anchorage FSS
Fairbanks FSS
SFO -Single Frequency Outlet (Air-Ground Communications)
SSFO -Simultaneous Single Frequency Outlet (Air-Ground Communications)
Tower
#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TABLE B-3
SHEET 1 of 4
OCTOBER 2, 1981
RECOMMENDED SEPARATION BETWEEN 345 KV INTERTIE
AND COMMUNICATIONS TOWERS
Licensee
(Site Name)
Alascom Inc.
(Twelve Mile)
Alascom Inc.
(Scotty Lake)
Alascom Inc.
(Bartlett Earth
Station)
Alascom Inc.
(Byers Creek)
Alascom Inc.
(Honolulu)
Alascom Inc.
(Reindeer Hill #2)
Alascom Inc.
(Cantwell)
Alascom Inc.
(Reindeer Hill #l
Alascom Inc.
(McKinley Village)
Alascom Inc.
(Healy)
Alascom Inc.
(Birch Creek)
Golden Valley Ele.
Golden Valley Ele.
(Sugar Loaf)
Golden Valley Ele.
(Healy Power Plant)
Latitude N Longitude W
Near Municipality
61° 46' 20" 149° 45' 06"
14 Miles east of Willow
62° 19 I 07 11
Trapper Creek
62° 19 I 57"
Talkeetna
62° 41' 20"
Byers Lake
63° 05' 41"
Honolulu
63° 24 I 14"
Cantwell
63° 24' 04"
Cantwell
63 O 24 I 34 II
Cantwell
150° 17' 55"
150° 01' 57"
150° 13 I 50"
149° 30' 18"
14 8 O 50 I 31"
148° 56' 16"
14 8 ° 50 I 5 8 11
63° 38' 37" 148° 47' 00"
McKinley Village
Recommended
Separation
In Feet
out of
Study Area
350'
1000'
350'
450'
250'
300 I
300'
300'
63° 50' 16"
Healy
148° 58' 41" 400'
64 O 10 I 14 II
Birch Creek
149° 17' 43" out of
Study Area
64 O 52 I 4 7 11
Ester Dome
148° 03' 20" out of
63° 47' 25" 148° 52' 18"
Sugar Loaf Mountain, Healy
63° 51' 21"
Healy
14 8 ° 57 I 0 0 11
Study Area
250 I
300'
Tower
#
15
16
17
18
19
20
21
22
23
24
25
26
27
TABLE B-3
SHEET 2 of 4
OCTOBER 2, 1981
RECOMMENDED SEPARATION BETWEEN 345 KV INTERTIE
AND COMMUNICATIONS TOWERS
Recommended
Licensee Latitude N Longitude W Separation
(Site Name) Near Municipality In Feet
Matanuska Telephone 63° 4 3 I 59" 14 8 ° 54 I 56" 250 1
Association McKinley Park
(McKinley Park)
Matanuska Telephone 62° 18 1 30" 149° 45 1 07" out of
Association 12 Miles east of Talkeetna Study Area
(Bald Mountain)
Matanuska Telephone 62° 19 1 19" 150° 06 1 54 II 300 1
Association Talkeetna (Central Office)
(Talkeetna)
Alaska Railroad 62° 19 1 48" 150° 06 1 48" 300 1
(Talkeetna) Talkeetna
Alaska Railroad 61° 15 1 31" 14 9 ° 31' 37" out of
(Summit) Anchorage Study Area
Alaska Railroad 62° 24 I 10" 150° 15' 08" 400'
(Chalitna Hwy. Trapper Creek
Camp)
Alaska Railroad 62° 41' 17" 150° 13' 34 II 250 I
(Byers Lake)
Alaska Railroad 62° 58' 40" 149° 38' 4 7" 400 1
(Hurricane) Hurricane
Alaska Railroad To Gold Creek, south of
Hurricane -Future Site
Alaska Railroad Future Site
Alaska Railroad 63° 24 I 13" 148 ° SO' 23" 250'
(Cantwell/Reindeer) Cantwell
Alaska Railroad 63° 39 1 17" 14 8 ° 4 6 I 41" 250 I
(Yanert) Yanert
Alaska Railroad 63° 4 3' 58" 148 ° 54 I 30" 250 I
(McKinley park) McKinley Park
Tower
#
28
29
30
31
32
33
34
35
36
37
38
TABLE B-3
SHEET 3 of 4
OCTOBER 2, 1981
RECOMMENDED SEPARATION BETWEEN 345 KV INTERTIE
AND COMMUNICATIONS TOWERS
Licensee
(Site Name)
Alaska Railroad
(Horseshoe passive)
Alaska Railroad
(Garner)
Alaska Railroad
(Healy)
Alaska Railroad
(Browne)
TV Translator
Alaska Public TV
Northern TV Inc.
Talkeetna Chamber
of Commerce
Alaska Dept. of
Highways
TV Translator
Alaska Public
Broadcasting
Latitude N Longitude w
Near Hunicipality
63 ° 4 4 I 4 0" 148° 53' 00"
Horseshoe pass
63° 50' 13"
Garner
63° 51' 15"
64 ° 10' 30"
Browne
62° 17' 56"
Talkeetna
62° 18 1 02"
(Application
Permit)
Talkeetna
62° 18' 00"
Talkeetna
62° 18 I 00"
Talkeetna
63° 23 1 14"
Cantwell
63° 52 1 30"
Healy
63° 50 1 13"
(Application
Permit)
Healy
14 8 ° 59' 30"
148 ° 58 1 44"
149 ° 19 1 00"
150° 06 1 25"
150° 05' 52"
for Construction
150° 05 I 36"
150° 06' 12"
148° 52 1 32"
148° 51' 00"
14 8 ° 58 I 38"
for Construction
Recommended
Separation
In Feet
200'
400'
250 I
out of
Study Area
300'
300 1
250 I
250 I
1000'
250 1
300 1
Tower
*
39
40
41
42
43
44
45
46
47
48
49
50
TABLE B-3
SHEET 4 of 4
OCTOBER 2, 1981
RECOMMENDED SEPARATION BETWEEN 345 KV INTERTIE
AND COMMUNICATIONS TOWERS
Licensee
(Site Name)
KUAC-TV
Northern TV Inc.
Latitude N Longitude W
Near Municipality
63° 52 1 30 11
Healy
148° 51 1 00 11
63° 52 1 30 11 148° 51 1 00 11
Healy/Suntrana/Usibelli
FAA 62° 04 I 18 11 150° 04 I QQ 11
Montana Creek Airport Montana Creek
FAA
Talkeetna Airport
FAA
VOR Station
FAA
FAA
Summit Airport
FAA
Golden North Airport
FAA
Cantwell SSFO
FAA
McKinley Park
Airport
FAA
McKinley Park SSFO
FAA
Healy River SFO
62° 19 1 27 11
Talkeetna
62° 18 1 00 11
Talkeetna
6 2 O 19 I 54 II
peters Creek
63° 19 1 54 11
Summit
63° 22 1 18 11
Cantwell
63 O 24 I 00 II
Cantwell
63° 44 I QQ 11
McKinley Park
63° 38 I 36 11
HcKinley Park
63° 50 1 00 11
Healy
150° 05 • 30 11
150° as• 42 11
149° 07 1 30 11
148° so• 54 11
148° 56 1 18 11
148° 54 I 30 11
148° 47 1 00 11
14 9 O 00 I 00 II
Recommended
Separation
In Feet
3800 1
3800 1
3800 1
1ooo•
3800 1
3800 1
1ooo•
3800 1
1ooo•
1ooo•
LEGEND: FAA -Federal Aviation Administration
SFO -Single Frequency Outlet (Air-Ground Communications)
SSFO -Simultaneous Single Frequency Outlet (Air-Ground
Communications)
ADDRESSES OF MICROWAVE LICENSEES
Alascom Inc.
vancouver, Washington
Vice President: George Roberts
( 206) -694-8333
Alaska Railroad
General Office Building
419 1st Avenue
Anchorage, Alaska 99501
Chief Engineer: Francis Weeks
( 9 0 7 ) - 2 6 5-24 56
Golden valley Electric Association
758 Illinois Street
Fairbanks, Alaska 99707
Chief Engineer: Joe Killion
(907)-452-1151
Mantanuska Telephone Association
Palmer, Alaska 99645
Graham Rolstad
(907)-745-3211
TABLE B-4
~~ Gilbert/Commonwealth engineers/consultants/architects
-----o•• ·--v--------. 0 0 ••. 0 ••o • • 0 0 0 . ·-. --0 __ 0 ____ 0_ --· .0 --0·--· . ··--•o .. ···--·--·---···-·· ---· ---·-·-· ----···· ---........ ______ _
COMMONWEALTH ASSOCIATES INC., 209 E. Washington Avenue, Jackson, Ml 49201/Tel. 517 788-3000
January 12, 1982
Mr. Francis Weeks
Alaska Railroad
General Office Building
419 1st Avenue
Anchorage, Alaska 99501
Dear Mr. Weeks:
The Alaska Power Authority is planning to construct a 345 kV
transmission line between Willow and Healy, Alaska in 1984.
The recommended line route (shown in Figure Bl of the enclosed
Appendix B: Communication Tower Survey) consists of the super-
link numbers lS, 38, 68, 78, 98, 128, 138, 158 and 168. A
profile of a typical transmission structure for the new 345 kV
line is shown in Figure 1.
Please review the list of your facilities in Table B-2 in
Appendix B for completeness. Also, please review the
recommended separations in Table B3 of Appendix B to determine
if there would be an impact of the transmission structures
on your communication facilities and advise us of the results
of your review within two weeks.
Transmission line Plan and Profile Drawings will be made avail-
able to you, if requested, when they are completed. Expected
completion dates are June to September 1982, depending on
locations.
If you require additional information, please contact J. F. Torri
at (517) 788-3048.
JFT/dl
Enclosure
CC: D. D. Wozniak, Alaska Power Authority
Gilbert/Commonwealth Family of Companies
Reading, PA Jackson, Ml New York, NY Rio de Janeiro, Brazil
lEPARTMENT OF TRANS?ORTATION
J!'EDERAL RAILROAD ADMINISTRATION
Mr. Lytle G iller, o\'.E.
Project M ager
Commonw lth Associates Inc.
209 E ashington Avenue
Jack on, MI 49201
Dear Mr. Miller:
THE ALASKA RAILROAD
Pouch 7·21 11
Anchorage, Aluka 99510
February 4, 1982
We appreciate very much receiving the Communication Tower Survey and
having an opportunity to comment on it. We have reviewed the list of our
facilities shown on Table B-2 and find that it is complete. The
operations shown on Table B-3 are acceptable-to The Alaska Railroad.
The Alaska Railroad would appreciate receiving the transmission line plan
and profile drawings as soon as you have them available. In the design
and construction phases of this project, the Alaska Railroad is looking
forward to working closely with you on this project
Sincere\t,
j-~-"_{U-tu-b
Francis C. Weeks, P.E.
Chief Engineer
___ ~~~~~-rtJ_~~~O~~~~~e~l~~ _en~neersjcon~lta~s/~~'~ct5 __ ··-_ ____ __ _ ·--··-___ __ _
COMMONWEALTH ASSOCIATES INC, 209 E. Washington Avenue, Jackson, Ml 49201/Tel. 517 788-3000
January 12, 1982
Mr. Joe Killion
Golden Valley Electric Association
758 Illinois Street
Fairbanks, AK 99707
Dear Mr. Killion:
Enclosed is a revised copy of the Communications Tower Survey
Report. The revision consists of a minor change of the
recommendation and pages have been renumbered. The recommended
line route (shown in Figure Bl of the enclosed Appendix B:
Communication Tower Survey) consists of the superlink numbers
lS, 3S, 6S, 7S, 9S, 13S, 15S and 16S. A profile of a
typical transmission structure for the new 345 kV line is
shown in Figure 1.
Please review the list of your facilities in Table B-2 in
Appendix B for completeness. Also, please review the
recommended separations in Table B3 of Appendix B to determine
if there would be an impact of the transmission structures
on your communication facilities and advise us of the results
of your review within two weeks.
Transmission line Plan and Profile Drawings will be made avail-
able to you, if requested, when they are completed. Expected
completion dates are June to September 1982, depending on
locations.
This report is provided also for your information as a member
of the Technical Review Committee.
If you require additional information, please contact J. F. Torri
at (517) 788-3048.
JFT/dl
Enclosure
CC: D. D. Wozniak, Alaska Power Authority
Gilbert/Commonwealth Family of Companies
Reading, PA Jackson, Ml New York, NY Rio de Janeiro, Brazil
,r--------
r-OLOEN VALLEY ELECTRIC ASSOCIATION lf"!!C. Sox 1249. Fairbanks, Alaska 99707. Phone 907-452-1151
Common Wealt Associates Inc.
Attn: Lytl Miller
209 E. W ington
Jackson, Michigan 49201
Re: Communications Tower Survey Report
Dear Lytle,
January 21, 1982
Per your request, I have reviewed the list of facilities (Table B-2),
and have no additions to recommend. I have also reviewed the recommended
separations (Table B-3) and they appear to be adequate. I would not expect
the powerline to interfere with any of our communication facilities. I am
sure that APA would cooperate in helping to promptly resolve any interference
created by the new line.
JK:ta
cc: Dave Wozniak,
Alaska Power Authority
g:::e·kd/2~
Joe Killion,
Chief Engineer
---~ Gil~~~~c::~~ln.""wealth enoinee~;~~~ts~~,~~cts ----------·--·---·--·-·--···--·-··--
coMMONWEALTH ASSOCIATES INC., 209 E. Washington Avenue, Jackson, Ml 49201/Tel. 517 788-3000
January 12, 1982
Mr. Gerry Markey
Frequency Engineering Branch
AAF-730
Airways Facilities Division
Federal Aviation Administration
800 Independence Avenue
Washington, D.C. 20591
Dear Mr. Markey:
As discussed in your telephone conversation with J. F. Torri
on January 6, 1982, the Alaska Power Authority is planning
to construct a 345 kV transmission line between Willow and
Healy, Alaska in 1984. The recommended line route (shown in
Figure Bl of the enclosed Appendix B: Communication Tower
Survey) consists of superlink numbers lS, 3S, 6S, 7S, 9S, 12S,
13S, 15S and 16S.
Please review the list of FAA facilities in Table B2 in
Appendix B for completeness. Also, please review the
recommended separations, Table B-3 in Appendix B, between
the proposed intertie and the communication towers admini-
stered by the FAA and advise us of the results of your
review within two weeks.
Transmission line Plan and Profile Drawings will be made
available to you, if requested, when they are completed.
Expected completion dates are June to September 1982,
depending on locations.
If you require additional information, please contact
Mr. J. F. Torri at (517) 788-3048.
JFT/dl
Enclosures
CC: D. D. Wozniak, Alaska Power Authority
Gilbert/Commonwealth Family of Companies
Reading, PA Jackson, Ml New York, NY Rio de Janeiro, Brazil
U5. Deportment
of Tronsponarion
Federal Aviation
Administration
Mr. Lytle G. . er, P.E.
Project M ger
Commo ealth Associates, Inc.
209 E. Washington Avenue
Jackson, MI 49201
Dear Mr. Miller:
800 Independence Ave •• S.W.
Washington. D.C. 20591
In response to your letter of January 12, we have reviewed the communications
tower survey for the 345 KV intertie proposed by the Alaska Power Authority.
The only facility that may have been overlooked is a unicorn station on 122.8
MHz operated by the Willow Air Service at the Willow Airport. Its coordinates
are 150-03-00N061-45-18W. ·
In regard to Table-3, the recommended separation distances, we have been advised
by our Research and Development Service that large power lines have caused
reflection problems to VOR's at distances in excess of one mile. It appears as
ii the only VOR involved in this study is well beyond this distance so we do not
expect any conflicts.
Thank you for giving us the opportunity to review this proposal.
RECE~l!ED
'·
DE?.-\~7. ~
Cc:7lm:)r;;:::.::. :. !
Gilbert/Commonwealth engineers/consultants/architects
COMMONWEALTH ASSOCIATES INC, 208 E. Washington Avenue, Jackson, Ml 48201/TeL 517 788-3000
i~arch 19, 1932
;~r. Gera 1 c J. Harkey
fl~equency Engineering
;..AF -730
.:.".. i n.vays Fac il1 ties uivi sion
Federal Aviation Aoministration
d00 Independence Avenue
~!ashington, D.C. 20591
Jea r :~r. i-la r key:
Subject: u:ucm1 STATION AT ~HLLOH ALASKA AIP.PORT
Thank you for your letter of February lC," 1982. The unicon station at
the U11low tdrport was included in our inventory of corrr.1unication towers
:;et\\een iiillow und Healy, Alasku.. HO\"lever, this unicon \-las net inclurled
in our Corrr.:uni cation Tower Survey report for two reasons:
1. The unicor.1 station was outsid.e the transmission line study area.
2. The unico~ station is located approximately 6500 feet southwest
of the existing Dourlas 138 kV Substation \l.tl-dch is the southern
teroinus of the proposed 1ntert1e. Th1s 6500 foot distance is
greater than the mininum FAA requ1red separations for un1coms.
Tf:dnk ycu for reviewino our Comnunicat1ons Tower Survey.
JFT /dl
C(" . .....
BCC:
D. C. ~czniak, APA
SAOtt
RRHoop
JTHancock
Principal Offices
Reading, PA Jackson, Ml Seattle, WA
c Gil bert/ Commonwealth engineers/consultants/architects
COMMONWEALTH ASSOCIATES INC, 209 E. Washington Avenue, Jackson, Ml 49201/Tel. 517 788-3000
January 12, 1982
Mr. Julian Wakefield
Director of Engineering
Telephone Utilities, Inc.
100 West 11th Street
Plaza Suite
Vancouver, Washington 98810
Dear Mr. Wakefield:
The Alaska Power Authority is planning to construct a 345 kV
transmission line between Willow and Healy, Alaska in 1984.
The recommended line route (shown in Figure Bl of the enclosed
Appendix B: Communication Tower Survey) consists of the super-
link numbers lS, 3S, 6S, 7S, 9S, 12S, 13S, 15S and 16S. A
profile of a typical transmission structure for the new 345 kV
line is shown in Figure 1.
Please review the list of your facilities in Table B-2 in
Appendix B for completeness. Also, please review the
recommended separations in Table B3 of Appendix B to determine
if there would be an impact of the transmission structures
on your communication facilities and advise us of the results
of your review within two weeks.
Transmission line Plan and Profile Drawings will be made avail-
able to you, if requested, when they are completed. Expected
completion dates are June to September 1982, depending on
locations.
If you require additional information, please contact J. F. Torri
at (517) 788-3048.
JFT/dl
Enclosure
CC: D. D. Wozniak, Alaska Power Authority
Principal Offices
Reading, PA Jackson, Ml Seattle, WA
February 11, l9b~
Inc.
Dear
REF: Your January 12, 1982, letter and Communicati'on Tower Survey
for 345 kV Intertie for the Alaska Power Authority
The list of Alascom sites as outlined in your report is correct.
There is one site elevation for the Reindeer il passive site that
needs to be corrected to 3238 feet {AMSL) .
The Alascom system:s·J_-n-l;he-willow to Healy area are heavy route
communications systems and little or no interference can be tol-
erated that affects the performance criteria. To reduce the po-
tential of interference from the transmission line, every effort
should be made to locate the transmission line route as far· as
possible from the microwave sites, and in no case should the line
route be any closer than a 500' radius of any site. Also,· no·-
powe= line or supporting· structure should intrude into the 2° (de-
gree) beam width of any existing microwave antenna or to within
150 feet of -the microwave beam centerline for the first 2 miles of
a microwave path, and-no:power line supporting-structure should in-
trude into the 150 foot radius area around the microwave beam center-
line from the 2 mile path point to the mid-path mile point. -
Be~ reflections off of power line supporting structures can also
cause severe interference problems. The possibility of reflections
frnm the supportinq structures will need to be analyzed when the
firvi.t. locati.Oris Of all structures have been determined.
~ above referenced criteria are .predicated upon both obstruction
to line-of-sight performance and the potential for radio frequency ,
interference problems that may result from transmission line electric
and magnetic field intensities, corona discharge, etc. Such criteria
might be revised pending detailed analysis of the particulars of this
transmission line design. Therefore, Alascom Engineering requests
that a detailed radio frequency interference .analysis-of the proposed
power· line be provided-to assure that no degradation will occur to
our VHF, microwave and earth station communications systems by the
close proximity of the power line to our sites.
Very truly yours,
~~/~t~
Manager, Systems Engineering
cc: D.D. Wozniak Roger Funk Julian Wakefield
Gilbert/Commonwealth engineers/consultants/architects
COMMONWEALTH ASSOCIATES INC, 209 E. Washington Avenue, Jackson, Ml 49201/Tel. 517 788-3000
February 18, 1982
Mr. Ronald G. Weber
Hanager, Systems Engineering
Telephone Utilities Inc.
100 West 11th, Plaza Suite
Vancouver, Washington 98660
Dear t·1r. Weber:
Subject: YOUR FEBRUARY 11, 1982 LffiER AND COMMUNICATION TOHER STUDY
FOR 345 KV ALASKA IHTERTIE
The transmission line Plan and Profile drawings showing the proposed
locations of the transmission structures.w111 be completed between
June and September 1982 depending on locations. Those drawings per-
taining to the locations where the transmission line will pass near
Alascom's microwave facilities will be sent to you when available.
A radio frequency interference analysis of the proposed power line
has been completed and can be found in the enclosed reports:
-Electrical Environmental Effects Report (R-2394) pages 7-11.
-Results of Preconstruction r~easurernents of Radio and TV Signal
Strengths and Radio Frequency Noise, Preliminary, Appendix l1,
dated October 15, 1981.
As nctec in the R-2394 report, Fi'l radio systems genet~ally do not
experience interference from corona generated radio noise for two
reasons: '
-The magnitude of radio noise 1s small in the VHF bands.
-The interference rejection properties inherent in F~·l radio systems
makes the~ virtually immune to static type disturbances.
Ho interference to FM radio reception caused by radio noise from the
proposed transmission line is expected.
Principal Offices
Reading, PA Jackson, Ml Seattle, WA
, Gilbert I Commonwealth
'208 E. Washington Avenue, Jackson, Ml 48201
Mr. Ronald G. Weber
February 18, 1982
Page 2
Transmission line rf noise (calculated at 1 MHz) falls off rapidly as
the separation from the transmission line increases. From Table 4 of
Report R-2394, the greatest level of rf noise,occurring during heavy
rain conditions, is below the measured ambient rf noise level at
separations gr~ater than about 600 feet from the edge of the trans-
mission line's right-of-way.
Trans1nission line rf noise also falls off rapidly as the frequency of
interest increases. For example, references 1 and 2 below show that
the rf noi~e levels at 10 MHz are 20-30 dB below the levels for 1 MHz.
Also the rt noise levels __ at 1 GHz are about 60 dB belo\'J the levels'
for 1 t·1Hz.
1. IEEE Radio Noise and Corona Subcontnittee Report, "Review of
Technical Considerations on Limits to Interference from Power
Lines and Stations," IEEE Tr~nsactions on Power Apparatus and
Systems, Vol. PAS-99,-Uo. 1, January/February 1980, pages 3~-
388, (Specifically page 367).
2. Pakala, ~1. E. and Chartier, V. L., "Radio Noise !wleasurement on
Overhead Po\'Jer Lines from 2.4 to 800 kV, 11 IEEE Transactions on
Po\'ler Apparatus and Systems, Vol. PP.S-90, ~1ay/June i 971, pages
1155-1165.
Therefore, no interference to microwave or earth station communications
systems caused by rf noise from the proposed transmission line is expected.
Radio noise from damaged insulators or loose transmission line hardware
could cause interference to comrr~nication systa~s in the same way as from
damaged insulators on distribution lines supplying power to thesetcomrnuni-
cations systems. Should this occur, they can be located and repaired
[Reference 11 of Report R-2394].
If you have additional questi~ns, please contact J. F. Terri at
( 517) 788-3048.
JFT/dl
Enclosures
CC: D. D. Wozniak -Alaska Power Authority
Julian Wakefield, Telephone Utilities, Inc.
Roger Funk, Alascom
BCC: RRHoop (for follow-up info)
'· Gilbert/Commonwealth engineers/consultants/architects
COMMONWEALTH ASSOCIATES INC, 208 E. Washington Avenue, Jackson, Ml 48201/TeL 517 788-3000
January 12, 1982
Mr. Mel Hoversten
Division of Telecommunication
Systems
5900 East Tudor Road
Anchorage, AK 99507
Dear Mr. Hoversten:
The Alaska Power Authority is planning to construct a 345 kV
transmission line between Willow and Healy, Alaska in 1984.
The recommended line route (shown in Figure Bl of the enclosed
Appendix B: Communication Tower Survey) consists of the super-
link numbers lS, 3S, 6S, 7S, 9S, l2S, l3S, l5S and l6S. A
profile of a typical transmission structure for the new 345 kV
line is shown in Figure 1. Table B2 in Appendix B gives the
communication tower locations.
Please review the recommended separations between the proposed
line and the earth station (Tower 36, Table B3 in Appendix B)
and determine if there would be an impact of the transmission
structure on your facilities. Please advise us of the results
of your review within two weeks.
Transmission line Plan and Profile Drawings will be made avail-
able to you, if requested, when they are completed. Expected
completion dates are June to September 1982, depending on
locations.
If you require additional information, please contact J. F. Torri
at (517) 788-3048.
JFT/dl
Enclosures
CC: D. D. Wozniak, Alaska Power Authority
During a telephone conversation between Mr. Hoversten and
J. F. Torri, on January 7, 1982, Mr. Hoversten said the
1000 foot minimum separation between the earth station and
the 345 kV intertie is acce~~~~tffi~s
Readmg, PA Jackson, Ml Seattle, WA
. Gilbert/Commonwealth engineers/consultants/architects
COMMONWEALTH ASSOCIATES INC, 209 E. Washington Avenue, Jackson, Ml 49201/Tel. 517 788-3000
January 12, 1982
Mr. Graham Rolstad
Matanuska Telephone Association
Palmer, AK 99645
Dear Mr. Rolstad:
The Alaska Power Authority is planning to construct a 345 kV
transmission line between Willow and Healy, Alaska in 1984.
The recommended line route (shown in Figure Bl of the enclosed
Appendix B: Communication Tower Survey) consists of the super-
line numbers lS, 3S, 6S, 7S, 9S, 12S, 13S, 15S and 16S. A
profile of a typical transmission structure for the new 345 kV
line is shown in Figure 1.
Please review the list of your facilities in Table B-2 in
Appendix B for completeness. Also, please review the
recommended separations in Table B3 of Appendix B to determine
if there would be an impact of the transmission structures
on your communication facilities and advise us of the results
of your review within two weeks.
Transmission line Plan and Profile Drawings will be made avail-
able to you, if requested, when they are completed. Expected
completion dates are June to September 1982, depending on
locations.
If you require additional information, please contact J. F. Torri
at (517) 788-3048.
JFT/dl
Enclosure
CC: D. D. Wozniak, Alaska Power Authority
Principal Offices
Reading, PA Jackson, Ml Seattle, WA