Fish Passage Site 10302246

Coordinates (dec. deg.): 58.41266°, -135.71271°
Legal Description: C040S059E08
Region: Southeast
Road Name: Glen's Ditch Road

Datum: NAD83
Quad Name / ITM: Juneau B-6
AWC Stream #:
Stream Name: Glen's Ditch

Elevation:

Site Comments: Site is just upstream from GDR01.

Survey Date: Aug 06, 2011

Survey SEA11-GDR02

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. Culvert gradient gray
  2. Culvert is too short

Comments: None

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 20.7
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.33
Corrugation Width(in.): 2.5
Condition Rating(1-5): 3
Approach Angle: 10.0
Sedimentation At Inlet: Yes
Inlet Substrate: Sand
Outlet Substrate: Sand
InletOutlet
Width(ft):3.0 3.0
Height(ft):2.9 2.4
Apron Length(ft):
Water Depth(ft): 0.28
Rustline Height(ft):0.7
Substrate Depth(ft):0.1 0.8
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.79
Culvert Gradient: -1.26%
Max Slope:
Max Slope Length:
 

Comments: Unidentified salmonids observed upstream and downstream from culvert. Pipe too short. Ditch in front of two houses.
  Culvert Observations:
  1. Culvert gradient gray
  2. Culvert is too short

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:SandGravel
Subdominant:GravelSand
Stream Slope(deg.):0
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 15.0 4.60
Upstream ordinary high water 37.0 3.80
Upstream ordinary high water 58.0 3.10

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 97.96
D/S Tailcrest or 1st Thalweg 0.00 92.06
D/S Water Surface Elev 0.00 92.19
D/S Water Surface Elev 2.00 92.24
Outlet Invert 2.00 91.96
Inlet Culvert Invert 22.70 91.70
U/S Headwater (1st resting) 22.70 92.24
U/S Water Surface Elev 25.00 92.24
U/S Water Surface Elev 100.00 92.24

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) Trap Duration(h): 30.0
Channel Type: Main Channel (>50% of water flow)
Comments: Unidentified juvenile salmonids observed upstream and downstream from culvert.
 
Gear Type: Visual Observation, Ground (B) Trap Duration(h): 30.0
Channel Type: Main Channel (>50% of water flow)

Fish Observations

No fish observations occurred during this survey.

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