Fish Passage Site 20103759

Coordinates (dec. deg.): 62.10643°, -145.51945°
Legal Description: C004N002W24
Region: South Central
Road Name: Sewer/waterline Road

Datum: NAD83
Quad Name / ITM: Gulkana A-4
AWC Stream #:
Stream Name: Troopers Creek

Elevation:

Site Comments: Site is downstream from site 20100571.

Survey Date: Sep 10, 2016

Survey CRWP17-GISp1

Observers: Kirsti Jurica, Hoots Witsoe

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient gray
  2. Culvert is poorly aligned

Comments: Culvert assessment performed and submitted by the Copper River Watershed Project. Longnose suckers and Arctic grayling caught in upstream and downstream traps.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 80.2
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.2
Corrugation Width(in.): 2.0
Condition Rating(1-5): 4
Approach Angle: 70.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: Gravel
InletOutlet
Width(ft):8.1 8.0
Height(ft):8.04 7.87
Apron Length(ft):
Water Depth(ft): 0.95
Rustline Height(ft):1.0
Substrate Depth(ft):0.0 0.2
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.1
Culvert Gradient: 1.46%
Max Slope:
Max Slope Length:
 

Comments: Inlet scour and damage due to misalignment. Low water at inlet during low flows.
  Culvert Observations:
  1. Culvert gradient gray
  2. Culvert is poorly aligned

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelCobble
Subdominant:SandGravel
Stream Slope(deg.):1
Stream Flow Stage:Low
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 5.90
Downstream ordinary high water 9.10
Downstream ordinary high water 6.90

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 100.00
D/S Grade Ctrl (Thalweg) 0.00 86.80
D/S Water Surface Elev 0.00 87.06
D/S Water Surface Elev 51.00 89.00
D/S Tailcrest or 1st Thalweg 51.00 88.87
Outlet Pool Water Elev 54.00 89.00
Max Pool Depth 54.00 87.97
Outlet Invert (on substrate) 60.00 88.06
D/S Water Surface Elev 60.00 89.01
Outlet Culvert Top 60.00 95.93
Inlet Culvert Top 140.00 97.10
Inlet Culvert Invert (on pipe) 140.00 89.06
U/S Water Surface Elev 140.00 89.10
U/S Grade Ctrl (Thalweg) 154.00 89.35
U/S Water Surface Elev 154.00 89.61
U/S Water Surface Elev 191.00 89.97
U/S Grade Ctrl (Thalweg) 191.00 88.64

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.

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