Fish Passage Site 20502135

Coordinates (dec. deg.): 61.77043°, -150.06857°
Legal Description: S019N004W06
Region: South Central
Road Name: Parks Highway

Datum: NAD83
Quad Name / ITM: Tyonek D-1
AWC Stream #:
Stream Name: Willow Creek tributary

Elevation:

Site Comments: None

Survey Date: Aug 17, 2011

Survey MSB11-PRK07

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. Outfall height red

Comments: Upst area is a shallow muddy slough and dwst area consists of a wide outlet pool which then has a narrow outlet channel to a wide flat muddy slough.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Red
 
Length(ft): 122.4
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 5
Approach Angle: 42.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):5.95 5.95
Height(ft):6.0 6.0
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.26
Rustline Height(ft):0.45
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 1.03
Outfall Type: Cascade Over Rip-Rap
Constriction Ratio: 0.27
Culvert Gradient: 0.45%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio red
  2. Outfall height red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:
Stream Slope(deg.):0
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 105.0 21.00
Upstream ordinary high water 54.0 20.00
Upstream ordinary high water 160.0 24.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Tailcrest or 1st Thalweg (Tail water control) 0.00 87.53
D/S Water Surface Elev (Tail water surface) 0.00 88.05
Max Pool Depth 16.00 86.11
Outlet Invert (On pipe at end of miter) 54.00 88.82
D/S Water Surface Elev (Water surface at outlet) 54.00 89.08
Outlet Culvert Top (Mitered pipe has a 12.4 foot Apron) 66.40 95.04
Road Elev 115.00 100.00
Inlet Culvert Top (Mitered pipe has a 12.4 foot Apron) 164.00 95.44
Inlet Culvert Invert (On pipe) 176.40 89.37
U/S Water Surface Elev (Water surface at inlet) 176.40 89.59
U/S Water Surface Elev 198.40 89.62
U/S Thalweg (Profile point in continuous pool glide) 198.40 88.63
U/S Water Surface Elev (Used for stream gradient. Continuous glide, no steam features.) 226.40 89.62
U/S Water Surface Elev (Used for stream gradient. Continuous glide, no stream features.) 326.40 89.62

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