Fish Passage Site 10302174

Coordinates (dec. deg.): 58.39236°, -134.57038°
Legal Description: C040S066E19
Region: Southeast
Road Name: Mendenhall 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-MDB01

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. None of this type

Comments: No fish observed and no traps set as stream is already in the AWC. Muskeg upstream and downstream, defined channel widths used for OHW.

Culvert Measurements

ID: 1 Structure Type: Open-bottom arch (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 42.7
Inlet Type: Headwall
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 18.0
Sedimentation At Inlet: No
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):7.5 7.5
Height(ft):3.8 3.5
Apron Length(ft):
Water Depth(ft): 1.51
Rustline Height(ft):1.7
Substrate Depth(ft):
Backwatered?: Yes
Baffles Present: No
Embedded?: Yes
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.67
Culvert Gradient: -0.37%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:OrganicOrganic
Stream Slope(deg.):0.25
Stream Flow Stage:High
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 35.0 4.90
Upstream ordinary high water 58.0 4.20
Upstream ordinary high water 91.0 4.40

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 99.60
D/S Grade Ctrl (Thalweg) 0.00 93.54
D/S Water Surface Elev 0.00 95.61
D/S Water Surface Elev 41.00 95.99
D/S Tailcrest or 1st Thalweg 41.00 94.54
Outlet Invert (On substrate) 46.00 94.58
D/S Water Surface Elev 46.00 96.09
Outlet Culvert Top 46.00 98.04
U/S Headwater 88.70 98.08
Inlet Culvert Top 88.70 98.28
Inlet Culvert Invert (On substrate) 88.70 94.42
U/S Water Surface Elev 188.00 96.33

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