Fish Passage Site 20100489

Coordinates (dec. deg.): 60.46152°, -145.30328°
Legal Description: C016S001E30
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-Cop23

Observers: Kirsti Jurica, Hoots Witsoe

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Mechanical damage or joints parting
  2. Shallow fill; inadequate roadfill volume above culvert
  3. Constriction ratio red

Comments: Culvert assessment performed and submitted by the Copper River Watershed Project. Lots of iron flocculant. Juvenile Coho caught upstream and downstream of crossing. Water surface elevations through culvert equal, downstream tail water control higher than inlet invert and water appears to be slow moving, site is backwatered. Culvert does appear to be undersized for crossing.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated aluminum) Fish Passage Rating: Green
 
Length(ft): 53.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 2
Approach Angle: 5.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):2.9 4.0
Height(ft):4.12 4.09
Apron Length(ft):
Water Depth(ft): 1.34
Rustline Height(ft):0.88
Substrate Depth(ft):0.0 0.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.36
Culvert Gradient: 0.87%
Max Slope:
Max Slope Length:
 

Comments: Seam starting to show signs of parting inside culvert. Inlet is distorted and width constricted.
  Culvert Observations:
  1. Mechanical damage or joints parting
  2. Shallow fill; inadequate roadfill volume above culvert
  3. Constriction ratio red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelOrganic
Subdominant:SandGravel
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 8.10
Upstream ordinary high water 8.20
Upstream ordinary high water 7.80

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 96.07
D/S Water Surface Elev 0.00 96.15
Max Pool Depth 14.00 93.09
Outlet Pool Water Elev 14.00 96.17
Outlet Culvert Top 34.00 98.92
Outlet Invert (on pipe) 34.00 94.83
D/S Water Surface Elev 34.00 96.17
U/S Water Surface Elev 87.00 96.17
Inlet Culvert Invert (on pipe) 87.00 95.29
Inlet Culvert Top 87.00 99.41
U/S Grade Ctrl (Thalweg) 99.00 95.21
U/S Water Surface Elev 99.00 96.17
U/S Grade Ctrl (Thalweg) 148.00 95.53
U/S Water Surface Elev 148.00 96.21

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): 6.0
Comments: No fish caught
 
Gear Type: Minnow Trap (B) Trap Duration(h): 6.0

Fish Observations

Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 2 Fish Measured: 2 Fork Lengths (mm) Min: 45 Max: 50 Mean: 47
Collected/Observed by Gear Type: Not Recorded Minnow Trap (2)  

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