Fish Passage Site 20703254

Coordinates (dec. deg.): 57.76665°, -152.53308°
Legal Description: S028S020W09
Region: Southwest
Road Name: USGS Battery Road

Datum: WGS84
Quad Name / ITM: Kodiak D-2
AWC Stream #: 259-21-10120-2011
Stream Name: Battery Creek Tributary


Site Comments: Culvert is on a road owned by the Coast Guard base.

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-MAR04

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: 2019

Comments: There is a confluence below outlet with another channel. Thalweg splits in 2 around island at outlet. Mild sag on top inside of culvert.

Culvert Measurements

ID: 1 Structure Type: Box culvert (Structural aluminum plate) Fish Passage Rating: Green
Length(ft): 63.3
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 2.5
Corrugation Width(in.): 9.0
Condition Rating(1-5): 5
Approach Angle: 22.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Gravel
Width(ft):14.79 14.65
Height(ft):4.62 4.45
Apron Length(ft):
Water Depth(ft): 0.4
Rustline Height(ft):
Substrate Depth(ft):2.28 2.45
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 2.28
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 2.45
Culvert Gradient: 2.99%
Max Slope:
Max Slope Length:

Comments: Measured Pipe gradient: Top: 2.99%, Water Surface: 2.89%, Invert: 2.78% Culvert dimensions from designs: 13'3" x 6'9"

Stream Measurements

Stream SubstratesUpstreamDownstream
Stream Slope(deg.):2.72
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)
Width (ft)
Upstream ordinary high water 37.0 8.10
Upstream ordinary high water 41.0 6.30
Upstream ordinary high water 46.0 3.70


Locator ID Culvert
Distance (ft)1
Distance From
Crossing (ft)2
Elevation (ft)
Road Elev (road surface) 102.60
D/S Thalweg (pool depth) 0.00 91.63
D/S Water Surface Elev 0.00 93.73
D/S Thalweg (on top of wood) 3.00 93.76
D/S Water Surface Elev 3.00 94.10
D/S Thalweg 16.00 93.64
D/S Water Surface Elev 16.00 94.49
Outlet Culvert Top 36.00 100.00
Outlet Invert 36.00 94.73
D/S Water Surface Elev 36.00 95.13
Inlet Culvert Top 99.30 101.89
Inlet Culvert Invert 99.30 96.49
U/S Water Surface Elev 99.30 96.96
U/S Thalweg 113.30 96.26
U/S Water Surface Elev 113.30 97.03
U/S Thalweg 135.30 97.45
U/S Water Surface Elev 135.30 97.63


  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