Fish Passage Site 20502087

Coordinates (dec. deg.): 62.82950°, -149.63704°
Legal Description: S032N002W27
Region: South Central
Road Name: Alaska Railroad

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

Elevation:

Site Comments: Alaska railroad site at MP 268.99

Survey Date: Jun 16, 2011

Survey MSB11-ARR204

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

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Woody Debris
  2. Structural Problem
  3. Mechanical damage or joints parting

Comments: Alaska railroad site at MP 268.99. Very low flow thru culvert and over cobble/woody/organic matter at outlet. Concrete culvert is cracked and broken off at inlet and gravel/cobble creates small pools. Long profile starts upstream. Low flow. Used algae growth line for high water mark in culvert.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Reinforced concrete) Fish Passage Rating: Gray
 
Length(ft): 41.46
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.):
Corrugation Width(in.):
Condition Rating(1-5): 2
Approach Angle: 15.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: Organic
InletOutlet
Width(ft):3.1 3.0
Height(ft):3.0 1.95
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.26
Rustline Height(ft):1.5
Substrate Depth(ft):0.0 1.05
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.76
Culvert Gradient: 4.27%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Woody Debris
  2. Structural Problem
  3. Mechanical damage or joints parting

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:GravelGravel
Stream Slope(deg.):4.86
Stream Flow Stage:Low
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 31.0 2.60
Upstream ordinary high water 57.0 3.60
Upstream ordinary high water 86.0 6.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
U/S Grade Ctrl (Thalweg) (On cobble with little flow) 0.00 95.11
U/S Water Surface Elev 0.00 95.21
U/S Grade Ctrl (Thalweg) (Top of small riffle) 35.00 93.32
U/S Water Surface Elev 35.00 93.51
Inlet Culvert Top 36.00 96.11
Inlet Culvert Invert (On pipe) 36.00 92.79
U/S Water Surface Elev (Water surface at inlet) 36.00 93.21
Road Elev (Center of railroad tracks) 56.00 99.31
Outlet Invert (On substrate) 77.46 92.21
D/S Water Surface Elev (Water surface at outlet. Downstream is a low flow drainage with lots of wooden debris in channel.) 77.46 92.47
Outlet Culvert Top 77.46 94.34

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