Fish Passage Site 20501204

Coordinates (dec. deg.): 61.58094°, -149.57300°
Legal Description: S017N002W11
Region: South Central
Road Name: Bike Path

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

Elevation:

Site Comments: None

Survey Date: Aug 19, 2009

Survey MSB09-PBP01

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

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient gray

Comments: Almost backwatered; TWS slightly lower than HWS, close enough to call them equal low velocity, wetland channel, probably not a barrier.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 46.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 3
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):4.0 4.0
Height(ft):4.0 4.0
Apron Length(ft):
Water Depth(ft): 0.52
Rustline Height(ft):0.6
Substrate Depth(ft):0.0 0.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 0.65%
Max Slope:
Max Slope Length:
 

Comments: Tailwater surface and headwater surface are only .01 difference which is close enough with margin of error to call site backwatered.
  Culvert Observations:
  1. Culvert gradient red

Stream Measurements

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

No stream width data available.

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev 1 96.64
U/S Headwater (pool/marsh immed u/s) 1 96.65
D/S Water Surface Elev (d/s WS) 1 0.00 24.0 96.57
D/S Water Surface Elev (@TWC) 1 13.00 11.0 96.59
D/S Tailcrest or 1st Thalweg (soft substrate) 1 13.00 11.0 96.20
Outlet Invert 1 24.00 0.0 96.12
Road Elev 1 47.00 102.26
Inlet Culvert Invert 1 70.50 0.0 96.42

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.

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