Fish Passage Site 10302244

Coordinates (dec. deg.): 58.43981°, -135.67612°
Legal Description: C040S059E04
Region: Southeast
Road Name: Wilson Road

Datum: NAD83
Quad Name / ITM: Juneau B-6
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: Ditch Drain adj. to Wilson Road

Survey Date: Aug 09, 2011

Survey SEA11-WLR01

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Constriction ratio red

Comments: Stikleback observed DS ditch in the backwater.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 30.8
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 3
Approach Angle: 36.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):2.0 2.0
Height(ft):2.0 2.0
Apron Length(ft):
Water Depth(ft): 0.27
Rustline Height(ft):0.5
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.47
Culvert Gradient: 1.72%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Constriction ratio red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:SandSand
Subdominant:OrganicOrganic
Stream Slope(deg.):0.29
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 12.0 4.80
Downstream ordinary high water 25.0 3.60
Downstream ordinary high water 39.0 4.60

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 101.50
D/S Water Surface Elev 0.00 98.16
D/S Tailcrest or 1st Thalweg 0.00 98.44
Outlet Pool Water Elev 3.00 98.16
Max Pool Depth 3.00 97.43
Outlet Invert 8.50 97.90
D/S Water Surface Elev 8.50 98.17
Outlet Culvert Top 8.50 100.00
Inlet Culvert Top 39.30 100.19
Inlet Culvert Invert 39.30 98.11
U/S Water Surface Elev 39.30 98.57
U/S Grade Ctrl (Thalweg) 42.00 98.76
U/S Headwater 42.00 98.93
U/S Water Surface Elev 140.00 99.21

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) Trap Duration(h): 30.0
Channel Type: Main Channel (>50% of water flow)
Comments: Ditch drainage backwater observed sticklebacks downstream.

Fish Observations

No fish observations occurred during this survey.

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