Fish Passage Site 20501448

Coordinates (dec. deg.): 61.56709°, -149.91556°
Legal Description: S017N004W13
Region: South Central
Road Name: Horseshoe Lake Road

Datum: NAD83
Quad Name / ITM: Anchorage C-8
AWC Stream #: 247-41-10100-2150-3070
Stream Name: Unnamed

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 MSB23-MS100

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

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient gray

Comments: Outlet and inlet are fed and feed into marshes. No distinct or significant channels.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 65.65
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: Organic
Outlet Substrate: Gravel
InletOutlet
Width(ft):5.0 5.0
Height(ft):5.0 4.7
Apron Length(ft):
Water Depth(ft):0.0 0.7
Rustline Height(ft):2.3
Substrate Depth(ft):0.0 0.4
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 0.88%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:Silt/ClaySilt/Clay
Stream Slope(deg.):
Stream Flow Stage:High

No stream width data available.

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Water Surface Elev 0.00 92.79
D/S Thalweg 0.00 91.11
D/S Thalweg 28.00 91.76
D/S Water Surface Elev 28.00 93.08
D/S Water Surface Elev 52.00 93.18
Outlet Culvert Top 52.00 96.30
Outlet Invert 52.00 92.53
Top of Pipe Inlet 117.65 96.88
Inlet Culvert Invert 117.65 91.77
U/S Water Surface Elev (Culvert water surface) 117.65 93.26
U/S Water Surface Elev 167.65 93.97

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