Fish Passage Site 10302232

Coordinates (dec. deg.): 58.51826°, -134.79492°
Legal Description: C039S064E02
Region: Southeast
Road Name: Herbert River Road

Datum: NAD83
Quad Name / ITM: Juneau C-3
AWC Stream #:
Stream Name: Herbert River tributary

Elevation:

Site Comments: None

Survey Date: Jun 23, 2011

Survey SEA11-HET02

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

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient gray
  2. Constriction ratio gray

Comments: None

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated plastic) Fish Passage Rating: Green
 
Length(ft): 42.76
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.0
Corrugation Width(in.): 0.0
Condition Rating(1-5): 4
Approach Angle: 9.0
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):4.5 4.0
Height(ft):3.6 3.7
Apron Length(ft):
Water Depth(ft): 0.69
Rustline Height(ft):
Substrate Depth(ft):0.9 0.3
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.62
Culvert Gradient: 0.96%
Max Slope:
Max Slope Length:
 

Comments: Smooth Bore Plastic Pipe. Muskeg upstream. *Beaver Bars @ Inlet; Inlet flared.

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClayGravel
Subdominant:GravelSand
Stream Slope(deg.):0.08
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 40.0 8.20
Upstream ordinary high water 60.0 7.00
Upstream ordinary high water 80.0 6.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 100.00
D/S Water Surface Elev 0.00 95.49
D/S Grade Ctrl (Thalweg) 0.00 95.38
D/S Water Surface Elev 20.00 95.57
D/S Tailcrest or 1st Thalweg 20.00 95.49
Max Pool Depth 26.00 94.87
Outlet Pool Water Elev 26.00 95.57
Outlet Invert (on substrate) 27.00 94.87
D/S Water Surface Elev 27.00 95.56
Outlet Culvert Top 27.00 98.58
Inlet Culvert Top 69.80 98.99
Inlet Culvert Invert (on substrate) 69.80 95.42
U/S Water Surface Elev (also headwater surface and 1st resting pool) 69.80 95.58
U/S Water Surface Elev 81.80 95.59
U/S Thalweg 81.80 93.82

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: None (A)
Comments: No traps set no fish observed.

Fish Observations

No fish observations occurred during this survey.

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