Fish Passage Site 20103961

Coordinates (dec. deg.): 61.57798°, -144.43779°
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-CHI02

Project Supervisor: Kim Clark, ADFG — Anchorage, AK
Observers: Kirsti Jurica

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio gray
  2. Culvert gradient gray
  3. Culvert is too short

Comments: Road Fill and Armor. Rock in inlet and outlet. Stream not in AWC. Structure type noted with 'might be open bottom.' but appears to be circular pipe with severe rust from photos. Substrate depth unknown/ not recorded. Rust line height not recorded. Data collected by Kirsti Jurica with the Copper River Watershed Project.

Culvert Measurements

ID: 1 Structure Type: Open-bottom arch (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 17.1
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 2
Approach Angle: 15.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):7.19 8.25
Height(ft):5.67 6.15
Apron Length(ft):
Water Depth(ft): 1.05
Rustline Height(ft):
Substrate Depth(ft):
Backwatered?: No
Baffles Present:
Embedded?: Unknown
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.74
Culvert Gradient: 0.94%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio gray
  2. Culvert gradient gray
  3. 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)
Downstream ordinary high water 11.80
Upstream ordinary high water 8.20
Upstream ordinary high water 10.50
Upstream ordinary high water 10.30

Elevations

Locator ID Culvert
Number
River
Distance (ft)1
Distance From
Crossing (ft)2
Relative
Elevation (ft)
Road Elev (Road Surface) 577.54
U/S Thalweg (Chit 2 ups real elevations) 0.00 570.55
U/S Water Surface Elev 0.00 571.93
Inlet Culvert Invert 16.00 571.17
U/S Water Surface Elev 16.00 571.76
Top of Pipe Inlet 16.00 576.84
Outlet Culvert Top 33.00 576.68
Outlet Invert 33.00 570.53
D/S Water Surface Elev 33.00 571.58
D/S Thalweg (Outlet riffle) 44.00 570.48
D/S Water Surface Elev 44.00 571.42
D/S Thalweg 66.00 570.70
D/S Water Surface Elev 66.00 571.34

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