Fish Passage Site 20103763

Coordinates (dec. deg.): 61.98560°, -145.34425°
Legal Description: C002N001W02
Region: South Central
Road Name: Hector Ewan Road

Datum: NAD83
Quad Name / ITM: Valdez D-4
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: Tributary to Yetna Creek

Survey Date: Sep 19, 2016

Survey CRWP17-Hec1

Observers: Kirsti Jurica, Hoots Witsoe

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Beaver Activity

Comments: Culvert assessment performed and submitted by the Copper River Watershed Project. Low water at inlet.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 75.1
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: Silt/Clay
InletOutlet
Width(ft):6.3 6.1
Height(ft):6.17 5.89
Apron Length(ft):
Water Depth(ft): 1.12
Rustline Height(ft):1.0
Substrate Depth(ft):0.0 0.25
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.14
Culvert Gradient: 2.97%
Max Slope:
Max Slope Length:
 

Comments: Top of culvert elevations used for gradient.
  Culvert Observations:
  1. Culvert gradient red
  2. Beaver Activity

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleGravel
Subdominant:GravelSilt/Clay
Stream Slope(deg.):2
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 4.60
Upstream ordinary high water 5.30
Upstream ordinary high water 6.70

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 100.00
D/S Water Surface Elev 0.00 88.40
D/S Grade Ctrl (Thalweg) 0.00 87.82
D/S Tailcrest or 1st Thalweg 24.00 88.53
D/S Water Surface Elev 24.00 89.00
Outlet Pool Water Elev 48.00 88.95
Max Pool Depth 48.00 86.25
D/S Water Surface Elev 60.00 89.00
Outlet Invert (on substrate) 60.00 87.88
Outlet Culvert Top 60.00 93.77
Inlet Culvert Top 135.00 96.00
Inlet Culvert Invert (on pipe) 135.00 89.83
U/S Water Surface Elev 135.00 89.94
U/S Grade Ctrl (Thalweg) 144.00 90.37
U/S Water Surface Elev 144.00 90.57
U/S Water Surface Elev 169.00 90.82
U/S Grade Ctrl (Thalweg) 169.00 90.44
U/S Grade Ctrl (Thalweg) 196.00 91.40
U/S Water Surface Elev 196.00 91.80

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

Gear Type: Minnow Trap (A) Trap Duration(h): 20.0
Comments: No fish caught

Fish Observations

No fish observations occurred during this survey.

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