Fish Passage Site 20502141

Coordinates (dec. deg.): 62.53811°, -150.09509°
Legal Description: S028N004W07
Region: South Central
Road Name: Alaska Railroad

Datum: NAD83
Quad Name / ITM: Talkeetna C-1
AWC Stream #:
Stream Name: Susitna River tributary

Elevation:

Site Comments: RR MP 242.24

Survey Date: Jun 21, 2011

Survey MSB11-ARR81

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
  2. Mechanical damage or joints parting
  3. Culvert sagging in middle
  4. Structural Problem
  5. Constriction ratio red

Comments: Alaska Railroad site with GIS FID # 81 at MP 242.24. Inlet section of culvert is torn off and several areas of pipe are caved in. Outlet is smashed and CSP is actual two sections joined together with a metal ring.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 29.9
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 1
Approach Angle: 72.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: None
InletOutlet
Width(ft):3.0 2.1
Height(ft):2.4 3.15
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.82
Rustline Height(ft):1.18
Substrate Depth(ft):0.24 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.14
Culvert Gradient: 1.30%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Mechanical damage or joints parting
  3. Culvert sagging in middle
  4. Structural Problem
  5. Constriction ratio red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClaySilt/Clay
Subdominant:OrganicOrganic
Stream Slope(deg.):0.03
Stream Flow Stage:Low
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 19.0 22.80
Downstream ordinary high water 27.0 22.00
Downstream ordinary high water 38.0 21.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Thalweg (thalweg in wetland pool) 0.00 92.82
D/S Water Surface Elev 0.00 93.16
D/S Water Surface Elev (Tail water surface) 35.00 93.17
D/S Tailcrest or 1st Thalweg (Tail water control) 35.00 93.10
Outlet Invert (On pipe) 44.00 92.35
D/S Water Surface Elev (Water surface at outlet) 44.00 93.17
Road Elev (Middle of railroad tracks) 59.00 99.41
Inlet Culvert Invert (This inlet invert shot is on substrate) 73.90 93.33
U/S Water Surface Elev (Water surface at inlet) 73.90 93.57
Inlet Culvert Invert (This inlet invert shot is on pipe. Was able to sink rod through substrate to pipe.) 73.90 92.84

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