Fish Passage Site 20100481

Coordinates (dec. deg.): 60.46641°, -145.35297°
Legal Description: C016S001W23
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-Cop15

Observers: Kirsti Jurica, Hoots Witsoe

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Compound gradient in pipe
  2. Culvert gradient red
  3. Constriction ratio gray
  4. Inlet perch

Comments: Culvert assessment performed and submitted by the Copper River Watershed Project. Surface water peters out upstream. Inlet partially overgrown causing inlet perch. Low water depth at inlet. Juvenile Coho salmon caught downstream of culvert. Sprawling channels upstream.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated aluminum) Fish Passage Rating: Red
 
Length(ft): 70.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 3
Approach Angle: 0.0
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):2.1 3.0
Height(ft):1.77 2.94
Apron Length(ft):
Water Depth(ft): 1.03
Rustline Height(ft):
Substrate Depth(ft):1.2 0.1
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.54
Culvert Gradient: 1.77%
Max Slope:
Max Slope Length:
 

Comments: Inlet partially overgrown causing inlet perch. Inlet and outlet have some damage.
  Culvert Observations:
  1. Culvert gradient red
  2. Constriction ratio gray
  3. Compound gradient in pipe
  4. Inlet perch

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicGravel
Subdominant:GravelOrganic
Stream Slope(deg.):0.5
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 3.50
Downstream ordinary high water 4.00
Downstream ordinary high water 4.10

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 91.81
D/S Grade Ctrl (Thalweg) 0.00 91.34
D/S Tailcrest or 1st Thalweg 35.00 92.30
D/S Water Surface Elev 35.00 92.51
Outlet Pool Water Elev 42.00 92.55
Max Pool Depth 42.00 91.15
Outlet Culvert Top 48.00 94.36
Outlet Invert (on substrate) 48.00 91.42
D/S Water Surface Elev 48.00 92.55
Inlet Culvert Top 118.00 95.60
Inlet Culvert Invert (on substrate) 118.00 93.83
U/S Water Surface Elev 118.00 93.96
U/S Water Surface Elev 128.00 94.30
U/S Thalweg 128.00 93.20

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): 18.0
Comments: No fish caught
 
Gear Type: Minnow Trap (B) Trap Duration(h): 18.0
Comments: No fish caught

Fish Observations

No fish observations occurred during this survey.

Questions or comments about this report can be directed to dfg.dsf.webmaster@alaska.gov