Fish Passage Site 20501158

Coordinates (dec. deg.): 61.58070°, -149.57302°
Legal Description: S017N002W11
Region: South Central
Road Name: Alaska Railroad

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

Elevation:

Site Comments: AKRR MP 164.32

Survey Date: Aug 25, 2009

Survey MSB09-ARR01

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 sagging in middle
  2. Mechanical damage or joints parting

Comments: Pipe is 2 halves (lengthwise) bolted together. HWS=TWS=BW. Top of pipe sags in middle. No stream features (wetland)

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 55.3
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 2
Approach Angle: 8.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: Gravel
InletOutlet
Width(ft):3.9 4.0
Height(ft):4.0 3.5
Apron Length(ft):
Water Depth(ft): 0.48
Rustline Height(ft):1.1
Substrate Depth(ft):0.0 0.3
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: -0.11%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert sagging in middle
  2. Mechanical damage or joints parting

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClaySilt/Clay
Subdominant:Silt/ClaySand
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)
U/S Headwater 1 96.50
Outlet Pool Water Elev 1 96.50
D/S Thalweg 1 0.00 3.0 96.72
Outlet Invert 1 3.00 0.0 96.02
Road Elev ((railroad surface)) 1 31.50 105.48
Inlet Culvert Invert 1 58.30 0.0 95.96
U/S Grade Ctrl (Thalweg) 1 62.30 4.0 96.03
U/S Water Surface Elev (@GP) 1 62.30 4.0 96.56

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

Gear Type: Minnow Trap (A) Trap Duration(h): 0.75
Comments: no fish caught; 25ft d/s

Fish Observations

No fish observations occurred during this survey.

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