HomeMy WebLinkAbout150217-AEA False Pass Hydro Analysis Page 1 of 3
February 17, 2015
To: AEA Project File
Subject: False Pass Hydro Review
Previous Studies:
October 1980, Regional inventory & reconnaissance study, small hydropower projects, ACOE
Study notes fish migration in all streams with development potential.
Resource Assessment
Hydrology
Analysis is based on Russel Creek discharge data.
Month 1 2 3 4 5 6 7 8 9 10 11 12 Annual
Russel Creek Unit Discharge (cfs/sq mi) 5.7 5.2 4.6 5.0 8.0 11.0 11.0 10.0 11.1 9.3 9.4 8.8 8.3
Aquatics
Current anadramous map:
Fish presence is expected to be an issue in project option #2.
False Pass Hydro Review
February 17, 2015 Page 2 of 3
Potential Hydro Projects
Two projects appear viable and are shown in the map below. The cost, aquatics, hydrology, and geology
will likely be the determining factors in which project is the preferred development.
Hydropower potential will be limited by water availability and fish presence. Stream gauging and aquatic
investigation recommended.
Development scheme
Preliminary reconnaissance level project configurations:
Project 1 Project 2
Basin Area 0.82 3.25 sq mi
Intake Elev 690 260 ft
Powerhouse Elev 270 75 ft
Static Head 420 185 ft
Hydraulic Capacity 7 15 cfs
Pipe Length 5,120 4,300 ft
Pipe OD 14 20 in
Net eff 73% 73%
Power 157 143 kW
Development maps
False Pass Hydro Review
February 17, 2015 Page 3 of 3
Energy Analysis
Month
Project 1 ‐
average hydro
generation, kWh
Project 2 ‐
average hydro
generation, kWh
average
demand, kWh
1 67,855 95,251 49,415
2 56,722 81,232 44,506
3 60,412 88,318 49,244
4 61,383 88,243 47,282
5 89,353 103,335 47,938
6 108,409 102,993 41,099
7 112,492 106,426 40,528
8 107,794 106,268 40,510
9 100,525 102,478 41,469
10 100,028 104,179 44,008
11 94,105 102,091 45,576
12 86,433 100,254 42,346
Total 1,045,512 1,181,069 533,919
Recommendations
Perform initial feasibility work focusing on hydrology and aquatics
Signed
Daniel Hertrich, PE