Fish Passage Site 10302192

Coordinates (dec. deg.): 58.32324°, -134.60719°
Legal Description: C041S066E10
Region: Southeast
Road Name: North Douglas Highway

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

Elevation:

Site Comments: North Douglas Highway at MP 10

Survey Date: Jun 08, 2011

Survey SEA11-NDH01

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. Outfall height red
  3. Constriction ratio gray

Comments: Beautiful habitat from ocean to outlet. Habitat gets steep after inlet, however levels out approximately 50 feet upstream again to nice pool complexes.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 80.04
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 3
Approach Angle: 50.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):4.4 4.4
Height(ft):4.6 4.5
Apron Length(ft):
Water Depth(ft): 0.31
Rustline Height(ft):1.2
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 1.27
Outfall Type: Free Fall on To Rip Rap
Constriction Ratio: 0.69
Culvert Gradient: 6.76%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Outfall height red
  3. Culvert gradient gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleBoulder
Subdominant:BoulderCobble
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 38.0 6.50
Upstream ordinary high water 74.0 6.60
Upstream ordinary high water 109.0 6.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 111.99
D/S Grade Ctrl (Thalweg) 0.00 91.29
D/S Water Surface Elev 0.00 91.86
D/S Grade Ctrl (Thalweg) 17.00 93.29
D/S Water Surface Elev 17.00 93.66
D/S Tailcrest or 1st Thalweg 33.00 95.11
D/S Water Surface Elev 33.00 95.54
Outlet Pool Water Elev 42.50 95.40
Max Pool Depth 42.50 93.61
Outlet Invert (bottom of pipe) 48.00 96.36
D/S Water Surface Elev 48.00 96.67
Outlet Culvert Top 48.00 101.00
Inlet Culvert Invert (bottom of pipe) 128.00 101.77
U/S Water Surface Elev 128.00 102.52
Inlet Culvert Top 128.00 106.71
Misc. (Substrate below upstream headwater control point) 132.00 102.99
U/S Headwater 132.00 103.41

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: Minnow Trap (A) Trap Duration(h): 2.0
Comments: No fish observed or captured
 
Gear Type: Minnow Trap (B) Trap Duration(h): 2.0
Comments: No fish were observed or captured

Fish Observations

No fish observations occurred during this survey.

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