Fish Passage Site 20501094

Coordinates (dec. deg.): 61.57991°, -149.74664°
Legal Description: S017N003W12
Region: South Central
Road Name: Larae Road

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

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-MS061

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

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red

Comments: None

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 92.7
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle: 15.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Organic
InletOutlet
Width(ft):2.97 3.0
Height(ft):2.98 3.18
Apron Length(ft):
Water Depth(ft):0.0 2.29
Rustline Height(ft):1.25
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.42
Culvert Gradient: 0.45%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelCobble
Subdominant:SandGravel
Stream Slope(deg.):1.08
Stream Flow Stage:High
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 14.0 7.90
Upstream ordinary high water 41.0 7.80
Upstream ordinary high water 51.0 7.60
Upstream ordinary high water 110.0 5.20

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 100.52
U/S Thalweg 0.00 84.31
U/S Water Surface Elev 0.00 85.28
U/S Water Surface Elev 55.00 84.47
U/S Thalweg 55.00 84.04
U/S Water Surface Elev 93.00 84.17
U/S Thalweg 93.00 83.67
U/S Water Surface Elev 100.00 84.01
Inlet Culvert Invert 100.00 83.08
Inlet Culvert Top 100.00 86.09
D/S Water Surface Elev 192.70 83.36
Outlet Invert 192.70 82.37
Outlet Culvert Top 192.70 85.65
D/S Water Surface Elev 222.70 83.29
D/S Thalweg 222.70 81.65
D/S Thalweg 245.70 81.53
D/S Water Surface Elev 245.70 82.44
D/S Thalweg 292.70 80.24
D/S Water Surface Elev 292.70 80.71

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