Fish Passage Site 10302173

Coordinates (dec. deg.): 58.39560°, -134.56735°
Legal Description: C040S066E18
Region: Southeast
Road Name: Taku Boulevard

Datum: NAD83
Quad Name / ITM: Juneau B-2
AWC Stream #:
Stream Name: Duck Creek

Elevation:

Site Comments: None

Survey Date: Aug 26, 2011

Survey SEA11-TKB01

Project Supervisor: Gillian O'Doherty, Alaska Department of Fish and Game — Anchorage, AK
Observers: Jason Olds, Charmagne Gutierrez

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red
  2. Culvert gradient gray

Comments: No fish were observed and no traps were set as stream is already in the AWC. Dense alders limit sighting for stream grade, omitted.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 55.6
Inlet Type: Headwall
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 34.0
Sedimentation At Inlet: No
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):3.0 3.0
Height(ft):2.8 2.3
Apron Length(ft):
Water Depth(ft): 0.73
Rustline Height(ft):1.1
Substrate Depth(ft):0.2 0.7
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.24
Culvert Gradient: 0.77%
Max Slope:
Max Slope Length:
 

Comments: Flared concrete headwalls at inlet.
  Culvert Observations:
  1. Constriction ratio red
  2. Culvert gradient gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleBoulder
Subdominant:Silt/ClaySilt/Clay
Stream Slope(deg.):
Stream Flow Stage:High
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 38.0 14.40
Upstream ordinary high water 67.0 13.70
Upstream ordinary high water 90.0 9.90

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 99.23
D/S Grade Ctrl (Thalweg) 0.00 93.05
D/S Water Surface Elev 0.00 94.16
D/S Water Surface Elev 53.00 94.24
D/S Tailcrest or 1st Thalweg 53.00 93.36
Outlet Pool Water Elev 58.00 94.22
Max Pool Depth 58.00 93.20
Outlet Culvert Top 75.00 95.75
D/S Water Surface Elev 75.00 94.24
Outlet Thalweg 75.00 93.51
Inlet Thalweg 130.60 93.08
U/S Headwater 130.60 94.30

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: None (A)
Comments: No traps set no fish observed.

Fish Observations

No fish observations occurred during this survey.

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