Fish Passage Site 20502073

Coordinates (dec. deg.): 61.67922°, -149.30130°
Legal Description: S018N001E05
Region: South Central
Road Name: Private Drive

Datum: NAD83
Quad Name / ITM: Anchorage C-7
AWC Stream #:
Stream Name: Little Creek

Elevation:

Site Comments: Little Su Farm private drive next to the barn.

Survey Date: Sep 19, 2011

Survey MSB11-LSF02

Project Supervisor: Gillian O'Doherty, Alaska Department of Fish and Game — Anchorage, AK
Observers: Mark Eisenman, John Greuey

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year: 2010


Site Observations:

  1. None of this type

Comments: Little Su Farm private drive next to the barn. Post replacement survey.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 25.4
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.5
Condition Rating(1-5): 5
Approach Angle: 25.0
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Sand
InletOutlet
Width(ft):5.92 5.95
Height(ft):3.85 3.68
Apron Length(ft):
Water Depth(ft): 0.42
Rustline Height(ft):0.8
Substrate Depth(ft):2.0 1.95
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 1.95
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.96
Culvert Gradient: 0.63%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelSand
Subdominant:SandGravel
Stream Slope(deg.):0.99
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 67.0 5.80
Upstream ordinary high water 79.0 7.50
Upstream ordinary high water 104.0 5.20

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Grade Ctrl (Thalweg) (GP) 0.00 95.74
D/S Water Surface Elev 0.00 96.25
D/S Tailcrest or 1st Thalweg (Tailwater control on manmade riffle) 5.00 96.43
D/S Water Surface Elev 5.00 96.60
D/S Water Surface Elev (outlet water surface) 34.00 96.67
Outlet Invert (on substrate) 34.00 96.25
Outlet Culvert Top 34.00 99.99
Road Elev 50.00 101.47
Inlet Culvert Top 59.40 100.15
Inlet Culvert Invert (on substrate) 59.40 96.22
U/S Water Surface Elev (inlet water surface) 59.40 96.75
U/S Grade Ctrl (Thalweg) (GP) 92.40 96.85
U/S Water Surface Elev (used for stream grad) 92.40 97.00
U/S Grade Ctrl (Thalweg) (GP on woody debris) 121.40 97.13
U/S Water Surface Elev 121.40 97.34
U/S Water Surface Elev (used for stream grad) 159.40 97.99
U/S Thalweg (GP) 159.40 97.19

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