Fish Passage Site 20503951

Coordinates (dec. deg.): 61.45040°, -149.75940°
Legal Description: S016N003W26
Region: South Central
Road Name: South Homestead Road

Datum: WGS84
Quad Name / ITM: Anchorage B-8
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: Crossing is under driveway. Drains White Lake to Cook Inlet.

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-MS032

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red

Comments: Lots of human trash and car parts. Stream upstream seems natural, road caused pond build up at inlet. Upstream was dammned for road construction. Sagging top in multiple locations inside culvert. Smooth corruguation on inside of culvert.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated plastic) Fish Passage Rating: Red
 
Length(ft): 49.92
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.125
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: Sand
Outlet Substrate: Gravel
InletOutlet
Width(ft):2.14 2.0
Height(ft):2.14 1.98
Apron Length(ft):
Water Depth(ft):0.0 0.14
Rustline Height(ft):0.0
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 1.43
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.27
Culvert Gradient: 3.30%
Max Slope:
Max Slope Length:
 

Comments: Inlet hieght: 0.5ft damage subtracted from total height; 0.55 clearance when plastic culvert torn piece is hanging down, potential fish passage limitation. (no picture of the damage in photo inventory)
  Culvert Observations:
  1. Constriction ratio red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:SandGravel
Subdominant:OrganicSand
Stream Slope(deg.):3.69
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 31.0 8.80
Downstream ordinary high water 73.0 4.50
Downstream ordinary high water 98.0 10.10

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 99.66
U/S Thalweg 0.00 89.82
U/S Water Surface Elev 0.00 90.36
U/S Water Surface Elev 61.00 90.30
U/S Thalweg 61.00 87.02
U/S Water Surface Elev 108.00 90.24
Inlet Culvert Invert 108.00 89.79
Inlet Culvert Top 108.00 92.02
Outlet Culvert Top 157.92 90.37
Outlet Invert 157.92 88.14
D/S Water Surface Elev 157.92 88.28
D/S Thalweg 160.92 86.17
D/S Water Surface Elev 160.92 86.85
D/S Thalweg 181.92 83.42
D/S Water Surface Elev 181.92 83.74
D/S Thalweg 216.92 81.61
D/S Water Surface Elev 216.92 82.20
D/S Thalweg 261.92 79.45
D/S Water Surface Elev 261.92 80.70

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