Fish Passage Site 20103962

Coordinates (dec. deg.): 61.57909°, -144.43939°
Legal Description: C003S005E26
Region: South Central
Road Name: Driveway

Datum: NAD83
Quad Name / ITM: Valdez C-2
AWC Stream #:
Stream Name: Chitna Creek

Elevation:

Site Comments: None

Survey Date: Sep 09, 2020

Survey UPD21-CHI01

Project Supervisor: Kim Clark, ADFG — Anchorage, AK
Observers: Andrew Kastning, Nicole Farnham

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio gray
  2. Culvert is too short

Comments: Submitted by Kirsti Jurica Copper River Watershed Project. Channel bed through crossing (substrate inside culvert), rockwall streambank on inlet side. Inlet slightly perched.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 20.43
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.25
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 20.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: Gravel
InletOutlet
Width(ft):3.88 3.88
Height(ft):3.61 3.44
Apron Length(ft):
Water Depth(ft): 0.87
Rustline Height(ft):1.6
Substrate Depth(ft):0.2 0.4
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.54
Culvert Gradient: 0.00%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient gray
  2. Culvert is too short

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:Silt/ClaySilt/Clay
Stream Slope(deg.):0.4
Stream Flow Stage:Low
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 7.30
Upstream ordinary high water 7.50
Upstream ordinary high water 6.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev (Road surface) 579.97
U/S Water Surface Elev 0.00 575.52
U/S Thalweg 0.00 574.17
Inlet Culvert Invert 12.00 574.34
U/S Water Surface Elev 12.00 575.39
Inlet Culvert Top 12.00 577.95
Outlet Culvert Top (Culv length is 20.43ft) 32.00 577.96
D/S Water Surface Elev 32.00 575.39
Outlet Invert 32.00 574.52
D/S Thalweg 48.00 574.70
D/S Water Surface Elev 48.00 574.96
D/S Thalweg 58.00 574.14
D/S Water Surface Elev 58.00 574.91

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.

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