Fish Passage Site 10302233

Coordinates (dec. deg.): 58.52068°, -134.79507°
Legal Description: C039S064E02
Region: Southeast
Road Name: Driveway to gravel pit

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

Elevation:

Site Comments: None

Survey Date: Jun 25, 2011

Survey SEA11-HET03

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. Constriction ratio gray

Comments: No traps were set as stream is already in the AWC and creek was completely dry at time of survey. Stream grade was calculated with between 10 and 15 times mean ordinary high water width due to sight limitations from foilage and elevations for stream grade were based off of substrate in dry creek bed.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 40.9
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 9.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: Gravel
InletOutlet
Width(ft):5.0 5.0
Height(ft):3.3 3.4
Apron Length(ft):
Water Depth(ft):
Rustline Height(ft):0.5
Substrate Depth(ft):1.7 1.6
Backwatered?: Yes
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 1.6
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.58
Culvert Gradient: 0.80%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicGravel
Subdominant:CobbleOrganic
Stream Slope(deg.):0.2
Stream Flow Stage:Dry, Defined Channel
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 61.0 11.10
Upstream ordinary high water 86.0 10.20
Upstream ordinary high water 104.0 8.60

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 102.91
D/S Grade Ctrl (Thalweg) (Dry) 0.00 97.20
D/S Tailcrest or 1st Thalweg (Dry) 22.00 97.49
Outlet Culvert Top (Invert out, on metal TBM) 30.00 100.00
Outlet Thalweg (Invert out, on substrate) 30.00 96.65
Inlet Thalweg (Invert in, on substrate) 70.90 96.96
Inlet Culvert Top (Invert in, on metal) 70.90 100.33
U/S Grade Ctrl (Thalweg) (Dry) 84.90 97.34
U/S Grade Ctrl (Thalweg) (Dry) 115.90 97.59
U/S Grade Ctrl (Thalweg) (Dry) 195.90 97.56

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 site was dry at time of survey.

Fish Observations

No fish observations occurred during this survey.

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