Fish Passage Site 20703249

Coordinates (dec. deg.): 57.76713°, -152.52919°
Legal Description: S028S020W09
Region: Southwest
Road Name: Magazine Access Road

Datum: NAD83
Quad Name / ITM: Kodiak D-2
AWC Stream #: 259-21-10120-2011-3121
Stream Name: Battery Creek Tributary


Site Comments: Culvert located at MP 0.3. Creek is an unnamed tributary to Battery Creek. Site is behind a locked Coast Guard gate. Confluence of another small stream 19ft upstream of inlet

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-MAR05

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

Site Observations:

  1. Culvert sagging in middle

Comments: Very small wetland stream. Confluence with another small stream 19ft upstream of inlet. Channel gradient was 0.5% upstream of the culvert and 1.16% downstream of the culvert per designs. The designed pipe gradient was 3.25% . There is a slight sag in the middle of middle of the culvert.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated aluminum) Fish Passage Rating: Green
Length(ft): 50.2
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 5
Approach Angle: 10.0
Sedimentation At Inlet: No
Inlet Substrate: Cobble
Outlet Substrate: Cobble
Width(ft):6.2 6.2
Height(ft):4.2 4.3
Apron Length(ft):
Water Depth(ft): 0.25
Rustline Height(ft):
Substrate Depth(ft):2.0 1.9
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 1.9
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.45
Culvert Gradient: 2.51%
Max Slope:
Max Slope Length:

Comments: Top of culvert gradient 2051%. Water Surface Gradient 2.53%. Invert Gradient 2.4%. Culvert dimesions from designs are 13'3"x 6'9"x 63"

  Culvert Observations:
  1. Culvert sagging in middle

Stream Measurements

Stream SubstratesUpstreamDownstream
Stream Slope(deg.):3.25
Stream Flow Stage:Low
Stream Width Type Distance From
Crossing (ft)
Width (ft)
Downstream ordinary high water 36.0 2.50
Downstream ordinary high water 46.0 3.80
Downstream ordinary high water 75.0 2.60


Locator ID Culvert
Distance (ft)1
Distance From
Crossing (ft)2
Elevation (ft)
Road Elev (road surface) 102.44
D/S Thalweg 0.00 94.89
D/S Water Surface Elev 0.00 95.52
D/S Thalweg (bottom of riffle) 10.00 95.42
D/S Water Surface Elev 10.00 95.57
D/S Thalweg 21.00 95.82
D/S Water Surface Elev 21.00 96.03
Outlet Invert 25.00 95.80
D/S Water Surface Elev 25.00 96.05
Outlet Culvert Top 25.00 100.00
Inlet Culvert Top 75.20 101.26
Inlet Culvert Invert 75.20 97.07
U/S Water Surface Elev 75.20 97.25
U/S Thalweg 81.20 97.11
U/S Water Surface Elev 81.20 97.36
U/S Thalweg 88.80 97.11
U/S Water Surface Elev 88.80 97.53
U/S Thalweg (spring comes in at 19) 95.20 96.98
U/S Water Surface Elev 95.20 97.61
U/S Thalweg (pool depth) 106.20 96.39
U/S Water Surface Elev 106.20 97.59
U/S Thalweg (pool crest) 109.20 97.35
U/S Water Surface Elev 109.20 97.59


  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