Fish Passage Site 20502136

Coordinates (dec. deg.): 61.89806°, -150.07678°
Legal Description: S021N004W19
Region: South Central
Road Name: Parks Highway

Datum: NAD83
Quad Name / ITM: Tyonek D-1
AWC Stream #:
Stream Name: Grey's Creek

Elevation:

Site Comments: None

Survey Date: Aug 17, 2011

Survey MSB11-PRK05

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: 2010


Comments: Upst area of both culverts at PRK05 and PRK06 which are on the same creek although several hundred feet apart is a lowland marsh area with slough flow. Appears several hundred feet outside of visual range Grey's Creek splits to form the two stream channels which cross the Parks Highway and rejoin somewhere in the downstream marsh.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Green
 
Length(ft): 106.6
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 5
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):11.9 11.88
Height(ft):10.75 10.72
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.66
Rustline Height(ft):1.6
Substrate Depth(ft):0.88 0.5
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.94
Culvert Gradient: 0.50%
Max Slope:
Max Slope Length:

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:SandCobble
Stream Slope(deg.):0.9
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)
Stream
Width (ft)
Downstream ordinary high water 66.0 10.00
Downstream ordinary high water 130.0 15.00
Downstream ordinary high water 190.0 13.00

Elevations

Locator ID Culvert
Number
River
Distance (ft)1
Distance From
Crossing (ft)2
Relative
Elevation (ft)
D/S Water Surface Elev (Used for stream gradient) 0.00 81.36
D/S Water Surface Elev (Used for stream gradient) 206.00 83.20
D/S Water Surface Elev 217.00 83.61
D/S Thalweg 217.00 82.88
Outlet Invert (On substrate) 304.40 84.38
D/S Water Surface Elev (Water surface at outlet invert) 304.40 85.04
Outlet Culvert Top 304.40 95.47
Road Elev 345.00 101.01
Inlet Culvert Top 386.20 95.88
U/S Water Surface Elev (Water surface at inlet invert) 386.20 85.51
Inlet Culvert Invert (On substrate) 386.20 84.82
U/S Water Surface Elev 461.20 85.75
U/S Thalweg (Profile point. Middle of upstream glide.) 461.20 83.99

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