Fish Passage Site 20501435

Coordinates (dec. deg.): 61.56248°, -149.82570°
Legal Description: S017N003W16
Region: South Central
Road Name: Beaver Lake Road

Datum: NAD83
Quad Name / ITM: Anchorage C-8
AWC Stream #: 247-50-10330-2050
Stream Name: Meadow Creek



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.


Project Supervisor: Gillian O'Doherty, ADFG
Observers: Mark Eisenman, Gillian O'Doherty

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year: 2015

Site Observations:

  1. None of this type

Comments: Culvert was replaced July 2015. Culvert reassessed April 2016. Large rainbow trout observed at outlet. Lots of sticklebacks in downstream backwatered old channel. Upstream water surface very flat with almost no grade control features except for the one directly upstream of the inlet.

Culvert Measurements

ID: 1 Structure Type: Closed-bottom arch (Structural steel plate) Fish Passage Rating: Green
Length(ft): 41.47
Inlet Type: Headwall
Outlet Type: Headwall
Corrugation Depth(in.): 6.0
Corrugation Width(in.): 3.25
Condition Rating(1-5): 5
Approach Angle: 0.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: Gravel
Width(ft):29.4 28.4
Height(ft):8.83 7.42
Apron Length(ft):
Water Depth(ft):
Rustline Height(ft):
Substrate Depth(ft):
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.26
Culvert Gradient: 0.17%
Max Slope:
Max Slope Length:

Comments: Could not access any features on the top of the pipe due to the headwall end cap. Slope is water surface gradient though culvert. Substrate gradient thought culvert is -0.05%

  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Stream Slope(deg.):0.01
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)
Width (ft)
Upstream ordinary high water 100.0 23.10
Upstream ordinary high water 200.0 23.00
Upstream ordinary high water 400.0 24.00


Locator ID Culvert
Distance (ft)1
Distance From
Crossing (ft)2
Elevation (ft)
Road Elev 100.81
D/S Thalweg 0.00 90.32
D/S Water Surface Elev 0.00 92.08
D/S Grade Ctrl (Thalweg) 134.00 91.65
D/S Water Surface Elev 134.00 92.26
D/S Thalweg (End of outlet riffle) 245.00 90.78
D/S Water Surface Elev 245.00 92.50
D/S Thalweg (Middle of outlet riffle) 261.00 91.82
D/S Water Surface Elev 261.00 92.60
Outlet Invert (On substrate, top of outlet riffle) 279.00 91.44
D/S Water Surface Elev 279.00 92.65
Outlet Culvert Top (Not a reliable elevation due to headwall end cap!) 279.00 99.09
Inlet Culvert Invert (On substrate, 1st resting) 320.80 89.44
U/S Water Surface Elev 320.80 92.72
Inlet Culvert Top (Not a reliable elevation due to headwall endcap!) 320.80 98.78
U/S Grade Ctrl (Thalweg) 365.80 90.99
U/S Water Surface Elev 365.80 92.68
U/S Water Surface Elev (Stream gradient) 424.80 92.73
U/S Water Surface Elev (Stream gradient) 620.80 92.72


  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

Gear Type: Minnow Trap (A) Trap Duration(h): 3.15
Comments: Trap set about 200 feet upstream of culvert
Gear Type: Minnow Trap (B) Trap Duration(h): 3.15
Comments: Trap set about 15 feet downstream of outlet.

Fish Observations

Species: adult threespine stickleback Life History: Unknown
Total Fish Observed: 13 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Downstream Minnow Trap (3)  Upstream Minnow Trap (10)  

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