Fish Passage Site 20502098

Coordinates (dec. deg.): 62.92512°, -149.65540°
Legal Description: S033N002W28
Region: South Central
Road Name: Alaska Railroad

Datum: NAD83
Quad Name / ITM: Talkeetna Mts D-6
AWC Stream #:
Stream Name: Chulitna River tributary

Elevation:

Site Comments: Alaska RR site at MP 277.39.

Survey Date: Jun 14, 2011

Survey MSB11-ARR345

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red

Comments: Alaska RR site at MP 277.39. Almost at grade w/ small outfall height. Upst and Dwst area consists of braided flow through thick vegetated lowland area with no defined channel. Other than gradient of pipe all other features would appear to make culvert green.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 70.83
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 4
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):8.0 8.3
Height(ft):8.05 7.9
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.01
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: 0.03
Outfall Type: Free Fall In To Pool
Constriction Ratio: 2.27
Culvert Gradient: 6.79%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:OrganicOrganic
Stream Slope(deg.):6.57
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 0.0 3.60
Downstream ordinary high water 24.0 3.30
Downstream ordinary high water 45.0 4.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Grade Ctrl (Thalweg) (Middle of riffle near wooden debris) 0.00 86.73
D/S Water Surface Elev 0.00 87.09
D/S Grade Ctrl (Thalweg) (Top of riffle) 25.00 87.98
D/S Water Surface Elev 25.00 88.29
D/S Grade Ctrl (Thalweg) (Middle of riffle) 56.00 90.55
D/S Water Surface Elev 56.00 90.77
D/S Grade Ctrl (Thalweg) (very close to pipe) 80.00 91.74
D/S Water Surface Elev 80.00 91.96
Outlet Invert 80.00 91.98
D/S Water Surface Elev (Water surface at outlet) 80.00 91.99
Outlet Culvert Top 80.00 109.79
Inlet Culvert Top 150.83 104.85
Inlet Culvert Invert 150.83 96.79
U/S Water Surface Elev (Water surface at inlet) 150.83 96.90
U/S Water Surface Elev 175.83 98.00
U/S Grade Ctrl (Thalweg) (Top of riffle near wooden debris) 175.84 97.81

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