Fish Passage Site 10302245

Coordinates (dec. deg.): 58.41943°, -135.68712°
Legal Description: C040S059E09
Region: Southeast
Road Name: Gustavus Airport Access Road

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

Elevation:

Site Comments: Glen's Ditch near airport.

Survey Date: Aug 06, 2011

Survey SEA11-GAR01

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: No

Step Pools: No
Construction Year:


Site Observations:

  1. None of this type

Comments: None

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 77.1
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 7.0
Sedimentation At Inlet: No
Inlet Substrate: Sand
Outlet Substrate: Sand
InletOutlet
Width(ft):9.0 9.0
Height(ft):8.6 7.6
Apron Length(ft):
Water Depth(ft): 0.63
Rustline Height(ft):2.0
Substrate Depth(ft):0.4 1.6
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.2
Culvert Gradient: -0.93%
Max Slope:
Max Slope Length:
 

Comments: Glen's Ditch Near Airport. Upstream/Downstream Visual Observations of Salmonids. Substrate grade using BOP actual measurments. * Using TOP, pipe set at 0.53% grade.
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:SandSand
Subdominant:GravelGravel
Stream Slope(deg.):0.1
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 70.0 6.70
Upstream ordinary high water 184.0 6.50
Upstream ordinary high water 225.0 9.40

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 103.41
D/S Grade Ctrl (Thalweg) 0.00 91.33
D/S Water Surface Elev 0.00 92.14
D/S Grade Ctrl (Thalweg) 10.00 92.04
D/S Water Surface Elev 10.00 92.48
D/S Water Surface Elev 15.00 92.65
D/S Tailcrest or 1st Thalweg 15.00 92.28
Max Pool Depth 20.00 90.73
Outlet Pool Water Elev 20.00 92.68
D/S Water Surface Elev 39.00 92.68
Outlet Culvert Top 39.00 99.59
Outlet Thalweg 39.00 92.05
Inlet Thalweg 116.10 91.33
Inlet Culvert Top 116.10 100.00
U/S Headwater (1st resting) 116.10 92.69
U/S Water Surface Elev 146.00 92.67
Misc. (upstream survey point, on substrate) 146.00 92.04

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)
 
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.

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