Fish Passage Site 20703440

Coordinates (dec. deg.): 57.76481°, -152.48702°
Legal Description: S028S020W11
Region: Southwest
Road Name: Old Military Road

Datum: WGS84
Quad Name / ITM: Kodiak D-2
AWC Stream #: 259-21-10120-2006-3050
Stream Name: Genivieve Creek


Site Comments: This is an old road converted to a trail over the outlet of Boy Scout Lake.

Multiple surveys have been conducted at this site — click on the drop down
arrow to the right of the survey date below to choose a different report for this site.

Survey UPD21-OMR01

Project Supervisor: Kim Clark, ADFG — Anchorage, AK
Observers: Kim Clark, Michael Mazzacavallo

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year: 2018

Comments: There is a lake 28 feet upstream of the culvert. Sandbag still present near lake/creek transition. Upstream stream slope is 0, downstream is 5.77%.

Culvert Measurements

ID: 1 Structure Type: Box culvert (Structural aluminum plate) Fish Passage Rating: Green
Length(ft): 36.2
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 3.0
Corrugation Width(in.): 9.0
Condition Rating(1-5): 5
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Boulder
Width(ft):15.3 15.7
Height(ft):4.13 4.12
Apron Length(ft):
Water Depth(ft): 0.38
Rustline Height(ft):
Substrate Depth(ft):2.77 2.78
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 2.77
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 2.03
Culvert Gradient: 4.12%
Max Slope:
Max Slope Length:

Comments: Culvert is at a lake outlet. Measured culvert gradient is Top: 4.12%, Water surface: 5.34%, and Invert 4.12%. Culvert dimensions per design are 16'6" x 6'8"

Stream Measurements

Stream SubstratesUpstreamDownstream
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)
Width (ft)
Downstream ordinary high water 59.0 9.80
Downstream ordinary high water 85.0 6.20
Downstream ordinary high water 98.0 7.20


Locator ID Culvert
Distance (ft)1
Distance From
Crossing (ft)2
Elevation (ft)
D/S Thalweg (tailwater control) 0.00 89.86
D/S Water Surface Elev (tailwater control) 0.00 90.11
D/S Thalweg (pool depth) 3.00 89.19
D/S Water Surface Elev (pool water surface) 3.00 90.07
D/S Thalweg (on wood) 6.00 90.25
D/S Water Surface Elev 6.00 90.44
D/S Thalweg (tailwater control, head of riffle) 40.00 92.07
D/S Water Surface Elev 40.00 92.13
D/S Thalweg 43.00 91.59
D/S Water Surface Elev 43.00 92.20
D/S Thalweg (on wood) 44.00 92.44
D/S Water Surface Elev 44.00 92.43
D/S Thalweg 71.00 92.91
D/S Water Surface Elev 71.00 93.36
D/S Thalweg (pool tailwater control) 82.00 94.46
D/S Water Surface Elev 82.00 94.87
D/S Thalweg (max pool depth) 89.00 94.08
D/S Water Surface Elev 89.00 94.92
D/S Thalweg 95.00 94.76
D/S Water Surface Elev 95.00 95.02
Outlet Invert 103.00 94.83
D/S Water Surface Elev 103.00 95.21
Outlet Culvert Top (on rib) 103.00 100.00
Inlet Culvert Top 139.17 101.49
Inlet Culvert Invert 139.17 96.78
U/S Water Surface Elev 139.17 97.14
U/S Thalweg (top of grade control) 149.17 97.46
U/S Water Surface Elev 149.17 97.65
U/S Thalweg (head of riffle) 166.17 97.92
U/S Water Surface Elev 166.17 98.19
U/S Thalweg (in the lake) 172.17 97.28
U/S Water Surface Elev (lake water surface) 172.17 98.21


  1. River distance is measured continuously throughout the survey reach along the thalweg of the stream.
  2. Measured from each end of the crossing along the thalweg of the stream.

Fish Sampling Efforts

No fish sampling occurred during this survey.

Fish Observations

No fish observations occurred during this survey.

Questions or comments about this report can be directed to