Fish Passage Site 20501077

Coordinates (dec. deg.): 61.57269°, -149.69247°
Legal Description: S017N002W07
Region: South Central
Road Name: Ridgecrest Road

Datum: NAD83
Quad Name / ITM: Anchorage C-8
AWC Stream #:
Stream Name: Little Meadow Creek

Elevation:

Site Comments: None

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 MSB23-MS063

Project Supervisor: Michael Mazzacavallo, Alaska Department of Fish and Game — Anchorage, AK
Observers: Michael Mazzacavallo, Beth Evers

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year: 2020


Site Observations:

  1. None of this type

Comments: Replaced in 2020. Several adult coho observed D/S, U/S and inside pipe. Several Reds observed U/S of survey area between culvert and lake. Wetted width widdens near outlet inside pipe.

Culvert Measurements

ID: 1 Structure Type: Box culvert (Structural aluminum plate) Fish Passage Rating: Green
 
Length(ft): 69.96
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 2.5
Corrugation Width(in.): 10.0
Condition Rating(1-5): 5
Approach Angle: 10.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):14.6 14.6
Height(ft):5.34 5.05
Apron Length(ft):
Water Depth(ft): 0.49
Rustline Height(ft):
Substrate Depth(ft):1.6 1.6
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 1.6
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.61
Culvert Gradient: 0.77%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleCobble
Stream Slope(deg.):0.76
Stream Flow Stage:High
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 54.0 20.00
Downstream ordinary high water 104.0 23.00
Downstream ordinary high water 136.0 28.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 103.37
D/S Water Surface Elev 0.00 94.21
D/S Thalweg 0.00 92.82
D/S Thalweg 23.00 93.45
D/S Water Surface Elev 23.00 94.44
Outlet Invert 100.00 94.47
D/S Water Surface Elev 100.00 94.96
Outlet Culvert Top 100.00 99.43
Inlet Culvert Top 169.96 99.96
U/S Water Surface Elev 169.96 95.75
Inlet Culvert Invert 169.96 94.71
U/S Water Surface Elev 206.96 96.03
U/S Thalweg 206.96 95.22
U/S Thalweg 269.96 94.56
U/S Water Surface Elev 269.96 96.28

Notes:

  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 dfg.dsf.webmaster@alaska.gov