Fish Passage Site 10302186

Coordinates (dec. deg.): 58.36432°, -134.58858°
Legal Description: C040S066E31
Region: Southeast
Road Name: Driveway adjacent to Glacier H

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

Elevation:

Site Comments: None

Survey Date: Aug 25, 2011

Survey SEA11-GLH25

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. Hydraulic flows exceeded capacity

Comments: No live fish observed or traps set as stream is already in the AWC. Dead spawned out salmon, pink/chum observed upstream and downstream of culvert. Ditched. Stream grade at 20 times mean OHW not possible as GLH26 intersects before that point, calculated with less than 10 times mean OHW.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 71.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle: 3.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):6.0 6.0
Height(ft):6.0 6.0
Apron Length(ft):
Water Depth(ft): 2.31
Rustline Height(ft):2.8
Substrate Depth(ft):0.0 0.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.28
Culvert Gradient: -0.84%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio red
  2. Hydraulic flows exceeded capacity

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:Silt/ClaySilt/Clay
Stream Slope(deg.):0.43
Stream Flow Stage:High
Stream Width Type Distance From
Crossing (ft)
Stream
Width (ft)
Upstream ordinary high water 43.0 18.40
Upstream ordinary high water 90.0 18.90
Upstream ordinary high water 132.0 27.80

Elevations

Locator ID Culvert
Number
River
Distance (ft)1
Distance From
Crossing (ft)2
Relative
Elevation (ft)
Road Elev 100.68
Misc. (No discernable tailcrest, however channel sits above invert in) 0.00 94.17
D/S Water Surface Elev 0.00 96.06
Outlet Pool Water Elev 25.00 96.24
Max Pool Depth 25.00 93.87
Outlet Invert (On substate) 30.00 93.93
Outlet Culvert Top 30.00 99.16
D/S Water Surface Elev 30.00 96.24
U/S Water Surface Elev 101.50 96.27
Inlet Culvert Top 101.50 99.32
Inlet Culvert Invert 101.50 93.33
U/S Headwater 102.00 96.27
U/S Water Surface Elev 233.50 96.83

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: Visual Observation, Ground (A)
Comments: Dead chum and pink salmon observed at site upstream and downstream from culvert.

Fish Observations

No fish observations occurred during this survey.

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