Fish Passage Site 20501113

Coordinates (dec. deg.): 61.56194°, -149.94389°
Legal Description: S017N004W14
Region: South Central
Road Name: Horseshoe Lake Road

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

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-MS093

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

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year: 2016


Site Observations:

  1. Constriction ratio red

Comments: None

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 39.72
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle: 45.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):5.85 5.9
Height(ft):5.5 4.6
Apron Length(ft):
Water Depth(ft): 2.09
Rustline Height(ft):2.5
Substrate Depth(ft):0.5 1.4
Backwatered?: Yes
Baffles Present:
Embedded?: No
Outfall Height:
Outfall Type: At Stream Grade
Constriction Ratio: 0.25
Culvert Gradient: 0.03%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicSand
Subdominant:Silt/ClayGravel
Stream Slope(deg.):0.08
Stream Flow Stage:High
Stream Width Type Distance From
Crossing (ft)
Stream
Width (ft)
Upstream ordinary high water 40.0 22.30
Upstream ordinary high water 60.0 22.80
Upstream ordinary high water 80.0 24.00

Elevations

Locator ID Culvert
Number
River
Distance (ft)1
Distance From
Crossing (ft)2
Relative
Elevation (ft)
Road Elev 100.14
D/S Thalweg 0.00 92.38
D/S Water Surface Elev 0.00 95.54
D/S Thalweg 40.00 91.91
D/S Water Surface Elev 40.00 95.54
Outlet Invert 60.00 93.49
Outlet Culvert Top 60.00 97.95
D/S Water Surface Elev 60.00 95.58
U/S Water Surface Elev 99.72 95.60
Inlet Culvert Top 99.72 97.96
Inlet Culvert Invert 99.72 92.49
U/S Water Surface Elev 139.72 95.60
U/S Thalweg 139.72 91.74
U/S Thalweg 179.72 92.42
U/S Water Surface Elev 179.72 95.68

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