Fish Passage Site 20502085

Coordinates (dec. deg.): 62.84651°, -149.63458°
Legal Description: S032N002W22
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 270.6

Survey Date: Jun 16, 2011

Survey MSB11-ARR208

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. Constriction ratio red
  2. Culvert gradient gray
  3. Beaver Activity
  4. Woody Debris
  5. Structural Problem
  6. Mechanical damage or joints parting

Comments: Alaska Railroad site at MP 270.6. Heavy beaver activity at inlet w/ lots of woody debris creating a vertical drop of 2.5' approx 4' into the inlet of pipe. Inlet is badly crushed and upst channel area is heavily ponded. Dwst channel flows into very thick wooded and brushy area.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 59.67
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 80.0
Sedimentation At Inlet: Yes
Inlet Substrate: Organic
Outlet Substrate: None
InletOutlet
Width(ft):4.15 5.0
Height(ft):2.6 4.95
Apron Length(ft):0.0 0.0
Water Depth(ft): 1.02
Rustline Height(ft):1.0
Substrate Depth(ft):2.5 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: 0.39
Culvert Gradient: 1.30%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio red
  2. Culvert gradient gray
  3. Beaver Activity
  4. Woody Debris
  5. Structural Problem
  6. Mechanical damage or joints parting

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicGravel
Subdominant:Silt/ClayCobble
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 35.0 11.10
Downstream ordinary high water 71.0 13.00
Downstream ordinary high water 105.0 13.80

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Water Surface Elev 0.00 89.59
D/S Grade Ctrl (Thalweg) (Mid point of glide) 0.00 88.41
Outlet Pool Water Elev (Water surface of max pool) 40.00 89.64
Max Pool Depth (max pool) 40.00 87.59
D/S Water Surface Elev (Water surface at outlet) 50.00 89.66
Outlet Invert 50.00 88.64
Outlet Culvert Top 50.00 93.63
Road Elev (Middle of railroad tracks) 80.00 99.41
Inlet Culvert Top 109.67 94.41
Inlet Culvert Invert (on substrate from beaver dam) 109.67 91.21
U/S Water Surface Elev (Water surface at inlet) 109.67 91.81

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