Fish Passage Site 10302243

Coordinates (dec. deg.): 58.43984°, -135.67397°
Legal Description: C040S059E04
Region: Southeast
Road Name: Wilson Road, drive adjacent

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

Elevation:

Site Comments: Drive way on Wilson Road.

Survey Date: Aug 09, 2011

Survey SEA11-WLR02

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 gray

Comments: Waterway akready in AWC. Visually observed juvenile salmonids upstream and downstream of culvert. Likely channels shifted from those shown on map to roadside ditches.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 44.4
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle: 10.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: Silt/Clay
InletOutlet
Width(ft):3.0 3.0
Height(ft):3.0 2.3
Apron Length(ft):
Water Depth(ft): 0.47
Rustline Height(ft):1.7
Substrate Depth(ft):0.5 0.13
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.67
Culvert Gradient: -0.05%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio gray
ID: 2 Structure Type: Pipe-arch (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 41.1
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 10.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: Silt/Clay
InletOutlet
Width(ft):3.3 3.3
Height(ft):2.0 2.0
Apron Length(ft):
Water Depth(ft): 0.99
Rustline Height(ft):1.5
Substrate Depth(ft):0.5 0.1
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.67
Culvert Gradient: 0.49%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio gray
  2. Culvert is too short

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClaySilt/Clay
Subdominant:OrganicOrganic
Stream Slope(deg.):0.04
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 35.0 7.40
Upstream ordinary high water 51.0 7.20
Upstream ordinary high water 72.0 5.40

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 99.21
D/S Tailcrest or 1st Thalweg 0.00 95.61
D/S Water Surface Elev 0.00 95.87
Outlet Pool Water Elev 19.00 95.89
Max Pool Depth 19.00 94.35
Outlet Thalweg (c2) 2 26.00 94.90
D/S Water Surface Elev (c1) 1 26.00 95.89
D/S Water Surface Elev (c2) 2 26.00 95.89
Outlet Culvert Top (c1) 1 26.00 97.72
Outlet Thalweg (c1) 1 26.00 95.42
U/S Headwater (c2) 2 67.10 95.89
Inlet Thalweg (c2, end of miter) 2 67.10 95.10
Inlet Thalweg (c1) 1 70.40 95.40
U/S Headwater (c1) 1 70.40 95.89
Inlet Culvert Top (c1) 1 70.40 98.38
U/S Water Surface Elev (Stream gradient start) 85.00 95.92
U/S Water Surface Elev (Stream gradient end) 225.00 95.50

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: Visual observation of juvenile salmonids upstream and downstream from culvert.

Fish Observations

Species: juvenile salmonid-unspecified Life History: Unknown
Total Fish Observed: 4 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: At Site Visual Observation, Ground (4)  

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