Fish Passage Site 20501447

Coordinates (dec. deg.): 61.58133°, -149.92383°
Legal Description: S017N004W12
Region: South Central
Road Name: S. Horseshoe Lake Road

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

Elevation:

Site Comments: BIG LAKE WATERSHED

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 MSB04-ML085

Observers: Gary Greenberg, Jen Ransom

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools:
Construction Year:


Comments: COHO FRY OBSERVED AT INLET POOL.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating: Green
 
Length(ft): 68.2
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.):
Corrugation Width(in.): 0.0
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate:
Outlet Substrate:
InletOutlet
Width(ft):4.0
Height(ft):4.0
Apron Length(ft):
Water Depth(ft):1.4 1.1
Rustline Height(ft):1.7
Substrate Depth(ft):
Backwatered?:
Baffles Present: No
Embedded?: Yes
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.87
Culvert Gradient: -0.47%
Max Slope:
Max Slope Length:
ID: 2 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating: Green
 
Length(ft): 68.1
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.):
Corrugation Width(in.): 0.0
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate:
Outlet Substrate:
InletOutlet
Width(ft):4.2
Height(ft):4.2
Apron Length(ft):
Water Depth(ft):1.0 1.2
Rustline Height(ft):1.5
Substrate Depth(ft):
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.87
Culvert Gradient: 0.28%
Max Slope:
Max Slope Length:

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:
Subdominant:
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream bed width 75.0 5.10
Upstream bed width 100.0 5.60
Upstream bed width 125.0 6.40
Upstream bed width 150.0 5.70
Upstream ordinary high water 75.0 10.10
Upstream ordinary high water 100.0 7.30
Upstream ordinary high water 125.0 9.80
Upstream ordinary high water 150.0 10.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
OHW Left Bank 97.47
D/S Thalweg 0.00 10.5 95.66
Max Pool Depth 5.50 5.0 96.35
Outlet Invert 1 10.50 0.0 96.42
Outlet Invert 2 10.50 0.0 96.33
Road Elev 44.50 101.76
Inlet Culvert Invert 2 78.50 0.0 96.52
Inlet Culvert Invert 1 78.50 0.0 96.10
U/S Thalweg 1 86.50 8.0 95.77
U/S Thalweg 2 86.50 8.0 96.00

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