Fish Passage Site 10302165

Coordinates (dec. deg.): 58.33865°, -134.52521°
Legal Description: C041S067E06
Region: Southeast
Road Name: North Douglas Highway

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

Elevation:

Site Comments: None

Survey Date: Jun 18, 2011

Survey SEA11-NDH06

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Constriction ratio gray
  3. Outfall height gray

Comments: No traps were set as stream is already in AWC. There is a small amount of culvert damage at the invert in. Fish were observed downstream of culvert. There may be another culvert further upstream on a private road. There was a house situated high on the bank of the river approximately 100 feet downstream on a steep grade that could face erosion problems.

Culvert Measurements

ID: 1 Structure Type: Pipe-arch (Structural steel plate) Fish Passage Rating: Red
 
Length(ft): 75.2
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 3
Approach Angle: 72.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):7.0 7.0
Height(ft):4.7 5.0
Apron Length(ft):
Water Depth(ft): 0.17
Rustline Height(ft):1.0
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.22
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.72
Culvert Gradient: 3.68%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Constriction ratio gray
  3. Outfall height gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:GravelGravel
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 44.0 10.20
Upstream ordinary high water 69.0 10.10
Upstream ordinary high water 138.0 8.90

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 99.72
D/S Grade Ctrl (Thalweg) 0.00 85.97
D/S Water Surface Elev 0.00 86.24
D/S Grade Ctrl (Thalweg) 21.00 86.41
D/S Water Surface Elev 21.00 86.85
D/S Water Surface Elev 30.00 86.94
D/S Tailcrest or 1st Thalweg 30.00 86.58
Outlet Pool Water Elev 39.50 86.94
Max Pool Depth 39.50 85.24
Outlet Culvert Top 45.00 92.24
Outlet Invert (Invert out, on metal) 45.00 86.99
D/S Water Surface Elev (Invert out) 45.00 87.16
Inlet Culvert Top 120.18 94.60
Inlet Culvert Invert (Invert in, on metal) 120.18 89.76
U/S Water Surface Elev (Invert in) 120.18 89.91
U/S Headwater (1st resting) 122.00 89.95
U/S Grade Ctrl (Thalweg) (1st resting, on substrate) 122.00 89.29

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: Unidentified fish observed downstream of 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