Fish Passage Site 20502086

Coordinates (dec. deg.): 62.85033°, -149.62981°
Legal Description: S032N002W22
Region: South Central
Road Name: Alaska Railroad

Datum: NAD83
Quad Name / ITM: Talkeetna Mts D-6
AWC Stream #: 247-41-10200-2551-3007
Stream Name: Indian River tributary

Elevation:

Site Comments: Alaska RR at MP 270.9 Dwst approx 84' is confluence with Indian River

Survey Date: Jun 16, 2011

Survey MSB11-ARR04

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

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Comments: Upst is a ponded slough w/ beaver activity and no obvious channel. Outlet and inlet are embedded although not the entire pipe. Dwst approx 84' is confluence w/ Indian R. Landscape fabric abandoned at site and getting into channel.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 41.2
Inlet Type: Mitered
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle: 30.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):8.4 7.65
Height(ft):4.9 5.55
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.48
Rustline Height(ft):0.0
Substrate Depth(ft):2.6 2.1
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.49
Culvert Gradient: 0.07%
Max Slope:
Max Slope Length:

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleGravel
Subdominant:OrganicCobble
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 34.0 7.00
Downstream ordinary high water 57.0 4.75
Downstream ordinary high water 84.0 5.20

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Grade Ctrl (Thalweg) (Bottom of riffle at confuluence with river) 0.00 87.43
D/S Water Surface Elev 0.00 87.99
D/S Grade Ctrl (Thalweg) (Top of riffle) 30.00 88.88
D/S Water Surface Elev 30.00 89.07
D/S Grade Ctrl (Thalweg) (Bottom of riffle) 58.00 89.24
D/S Water Surface Elev 58.00 89.42
Outlet Invert (On substrate) 84.00 90.03
D/S Water Surface Elev (Water surface at outlet) 84.00 90.51
Outlet Culvert Top 84.00 95.73
Road Elev 104.00 99.37
Inlet Culvert Top 125.20 95.76
Inlet Culvert Invert 125.20 90.65
U/S Water Surface Elev (Water surface at inlet) 125.20 90.92
U/S Grade Ctrl (Thalweg) (Top of riffle) 134.20 91.33
U/S Water Surface Elev 134.20 91.56

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

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