Fish Passage Site 20100468

Coordinates (dec. deg.): 60.48904°, -145.44949°
Legal Description: C016S001W08
Region: South Central
Road Name: Copper River Highway

Datum: NAD83
Quad Name / ITM: Cordova B-4
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: None

Multiple surveys have been conducted at this site — click on the drop down
arrow to the right of the survey date below to choose a different report for this site.

Survey CRWP17-Cop2

Observers: Kirsti Jurica, Hoots Witsoe

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red

Comments: Numerous juvenile Coho salmon observed upstream.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 107.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 2
Approach Angle: 15.0
Sedimentation At Inlet: Yes
Inlet Substrate: Organic
Outlet Substrate: None
InletOutlet
Width(ft):3.0
Height(ft):3.3 2.66
Apron Length(ft):
Water Depth(ft): 2.6
Rustline Height(ft):3.0
Substrate Depth(ft):0.2 0.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 2.02%
Max Slope:
Max Slope Length:
 

Comments: Culvert outlet fully submerged. There is a log in the culvert outlet, maybe a DOT reaming long for removing debris? Unable to obtain accurate outlet measurements with the log in the way. Stream widths over exaggerated due to the site being a side slough and the channel is filling in with vegitation. Constriction ration not taken into account. Water surface elevations within 0.02 of each other site is backwatered and water slow moving through crossing. However log in outlet and culvert condition shouild be taken into account for this site. Inlet damage.
  Culvert Observations:
  1. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:Silt/ClaySilt/Clay
Stream Slope(deg.):0
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 27.00
Upstream ordinary high water 31.50
Upstream ordinary high water 35.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 100.00
D/S Thalweg (Slough) 0.00 91.43
D/S Water Surface Elev 0.00 93.61
D/S Water Surface Elev 11.00 93.61
Outlet Invert (on substrate) 11.00 91.01
Outlet Culvert Top 11.00 93.67
Inlet Culvert Top (inlet damage) 118.00 95.84
Inlet Culvert Invert (on substrate) 118.00 92.54
U/S Water Surface Elev 118.00 93.63
U/S Water Surface Elev 129.00 93.63
U/S Grade Ctrl (Thalweg) 129.00 91.44

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): 3.0
 
Gear Type: Minnow Trap (B) Trap Duration(h): 3.0

Fish Observations

Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 13 Fish Measured: 4 Fork Lengths (mm) Min: 65 Max: 80 Mean: 70
Collected/Observed by Gear Type: Not Recorded Minnow Trap (5)  Not Recorded Minnow Trap (8)  

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