HomeMy WebLinkAboutS Intertie Route Selection Phase 1 4-1996Southern Intertie
Route Selection Study
Phase I
Status Report
on
April 2, 1996 eh
POWER Engineers c
Dames & Moore E
’
Alternative Routes
e Tesoro
e Enstar
e Quartz Creek
=» Bird Point Alternatives
POWER Engineers Southern Intertie
Dames & Moore Project
Alternative Corridor Analysis
e Siting Opportunities
e Key Siting Issues and Constraints
e Regulatory Requirements
e Recommendations
POWER Engineers Southern Intertie
Dames & Moore Project
Siting Opportunity
Key Siting Issues
Regulatory
Requirements
Recommendations
Tesoro Route
e Existing Tesoro Pipeline
e Trumpeter Swan Nests
e Captain Cook SRA
e Remote Residential Views
e Cultural Resource Sites
e Land Water Conservation Fund (LWCF)
e Underground Line Through Captain Cook SRA
e Avoid Possession Point
Enstar Route
Siting Opportunity e Existing Enstar Pipeline
Key Siting Issues e Trumpeter Swan Nesting Habitat
e KNWR Minimal and Moderate Management Areas
e Potter Marsh
e Residential Views
e Cultural Resource Sites
Regulatory
Requirements e Section 404
Recommendations e Underground Line in Potter Marsh Area and Near
Chickaloon Bay
Quartz Creek Route
e Existing Quartz Creek Transmission Line Siting Opportunity
Key Siting Issues e Trumpeter Swan Nesting Habitat
e Anadromous Fish Streams
e Known Avalanche Areas
e Chugach National Forest
e Chugach State Park
e Seward Highway National Scenic Byway
e Chugach State Park Natural Management Area
e Retention VQO in Chugach National Forest
e Cultural Resources
e Russian and Kenai Rivers
Regulatory e Land Water Conservation Fund Compliance Along Kenai
Requirements River
e Chugach National Forest Special Use Permit
e Chugach State Park
Recommendations e Match Structure Types
e Minimize Vegetation Clearing
Siting Opportunity
Key Siting Issues
Regulatory
Requirements
Recommendations
Bird Point Submarine Crossing
Narrowest Crossing of Turnagain Arm
e Sixmile Creek
e Proposed Bird Point Recreation Area
e Chugach National Forest Special Use Permit
e Chugach State Park
e Section 404
e Underground Transition Facilities at Bird Point and
Sunrise for the Submarine Crossing
Siting Opportunity
Key Siting Issues
Regulatory
Requirements
Recommendations
Bird Point Aerial Crossing
Narrowest Crossing of Turnagain Arm
e Crossing Sixmile Creek
e Proposed Bird Point Recreation Area
e 530 Foot Structure in Turnagain Arm
e Chugach National Forest Special Use Permit
e Aerial Crossing Will Create a FAA Hazard Determination
e Chugach State Park
e Not Feasible Due to FAA Hazards and Unacceptable
Visual Impacts
Route
Cost Summary
Tesoro Enstar
Quartz Creek
138kV
$$ millions
$104.5 - $118.9
$85.6 - $100.0’
$95.2 - $100.9"
$84.6 - $90.3°
$84.7 - $94.7
230kV
$$ millions
$115.6 - $135.1 $109.8 - $119.0 $91.2 - $102.3
Line Length
Miles
POWER Engineers
Dames & Moore
Dryden & LaRue
55.1 - 59.2 69.5 - 78.4
Note 1: Submarine 4 - 1 phase SCFF
Note 2: Submarine 2 - 3 phase Flat SCFF
I \ (\ C oR ‘ VC Lido
Cewge SAA
115.6 - 140.7
Southern Intertie
Project
Cable Summary
Tesoro
Enstar
Quartz Creek
POWER Engineers
Dames & Moore
Dryden & LaRue
$ millions/miles
Base Route Base Route Bird Pt. Alt.
Cable Type |4-1 phase SCFF' |4-1 phase SCFF' 1-3 phase
2-3 phase SCFF’ |2-3 phase SCFF’ Pipe Type
HPGF
Submarine | $63.3/14.2 miles’ | $35.1/7.9 miles’
$ millions/miles |$44.4/14.2 miles” | $24.5/7.9 miles’ | $13.4/4.0 miles
Underground $9.5/4.6 miles $15.5/7.6 miles None
Southern Intertie
Project
NKT Flat 3 Phase Cable
1616.7km Installed Since 1941; last 1994/95
First @ 132kV AC in 1950/51; 5.2km
Total @ 115kKV AC or higher; 265.9km
Contacted two Utilities & Manufacturer
e Copenhagen Electricity Department
e ELSAM
e No Electrical Failures
e Mechanical Failures due to anchors and trawlers
POWER Engineers Southern Intertie
Dames & Moore Project
Dryden & LaRue
Route Selection Study
Lead Agency Determination
EIS/ROD (two field seasons)
Permits/ROW Acquisition
Survey/Design/Procurement
e Summer Field Season
Construction
e Submarine Construction
e Summer
e In-Service
POWER Engineers
Dames & Moore
Dryden & LaRue
Preliminary Schedule
June 1996
April 1996 - June 1996
July 1996 - Feb. 1999
Mar. 1999 - Sept. 2001
Mar. 1999 - Sept. 2001
Oct. 2001 - Sept. 2003
May 2003 - Sept. 2003
Jan. 2004
Southern Intertie
Project
Southern Intertie Project
VICINITY MAP Figure 1-1
TIN TI2N TION T8N T6N T4N
State Park
National Wildlife Refuge
| Chugach National Forest
Private, Borough or State Selected Land
General Reference Features
Pipeline
/ Transmission Line
Railroad
‘Borough Boundary
Rivers and Streams
Oil Platform
__ Lakes/Inlet
JRANGE _
[e;si4ial2i 4
I 7 | She [0] 8) 2)
| 7 | 16/4) 9)
L 99 | 20) 21/ 22) 23 | 24/
Corridor
/ Alternative Route
Link Number Code
Existing Substations
12 MILES,
= Dames & Moore
Draft Date: April 2, 1996
Alternative Corridors
Southern Intertie Project
Proposed Anchorage to Kenai
Peninsula Transmission Line Nos NaL NOL NOL NoL