Fish Passage Site 20501184

Coordinates (dec. deg.): 61.68557°, -149.29788°
Legal Description: S018N001E04
Region: South Central
Road Name: Private road on Elk Ranch

Datum: WGS84
Quad Name / ITM: Anchorage C-7
AWC Stream #:
Stream Name:

Elevation:

Site Comments: None

Survey Date: Jul 14, 2009

Survey MSB09-ELK02

Project Supervisor: Gillian O'Doherty, ADFG
Observers: Heidi Zimmer, Ben Histand

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year: 2009


Site Observations:

  1. None of this type

Comments: Post-replacement survey;

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 30.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 5
Approach Angle: 51.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):6.0 6.0
Height(ft):3.6 4.0
Apron Length(ft):
Water Depth(ft): 0.31
Rustline Height(ft):
Substrate Depth(ft):2.2 1.7
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 1.7
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.95
Culvert Gradient: 1.50%
Max Slope:
Max Slope Length:
 

Comments: Uniform riffle through pipe.
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:GravelGravel
Stream Slope(deg.):2.3
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 67.0 8.00
Upstream ordinary high water 92.0 5.00
Upstream ordinary high water 147.0 6.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Water Surface Elev 1 0.00 95.95
D/S Thalweg (profile pt) 1 0.00 95.41
D/S Thalweg (profile pt) 1 23.00 95.69
D/S Water Surface Elev 1 23.00 96.18
Outlet Invert (on substrate) 1 43.00 96.26
D/S Water Surface Elev (outlet water surface) 1 43.00 96.51
Outlet Culvert Top 1 43.00 100.00
Road Elev 1 58.00 101.25
Inlet Culvert Top 1 73.40 100.47
Inlet Culvert Invert (on substrate) 1 73.40 96.75
U/S Water Surface Elev (inlet water surface) 1 73.40 97.06
U/S Water Surface Elev 1 80.40 97.22
U/S Thalweg (profile pt) 1 80.40 96.95
U/S Water Surface Elev (water surface for gradient) 1 94.40 97.71
U/S Water Surface Elev (water surface for gradient) 1 183.40 99.78

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