Fish Passage Site 10302153

Coordinates (dec. deg.): 58.28292°, -134.37453°
Legal Description: C041S067E25
Region: Southeast
Road Name: Thane Road

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

Elevation:

Site Comments: None

Multiple surveys have been conducted at this site — click on the drop down
arrow to the right of the survey date below to choose a different report for this site.

Survey SEA11-THN01

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. Outfall height red
  2. Culvert gradient red
  3. Constriction ratio gray
  4. Mechanical damage or joints parting

Comments: Upstream has a small amount of habitat and the gradient became very steep. Upstream side has significant manipulation and stream has been channelized.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated aluminum) Fish Passage Rating: Red
 
Length(ft): 60.86
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 3
Approach Angle: 13.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.4 2.97
Height(ft):3.0 2.75
Apron Length(ft):
Water Depth(ft): 0.48
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 1.27
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.55
Culvert Gradient: 2.99%
Max Slope:
Max Slope Length:
 

Comments: Some damage to inlet.

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:GravelBoulder
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 40.0 5.80
Downstream ordinary high water 57.0 5.50
Downstream ordinary high water 72.0 7.30

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 97.25
D/S Grade Ctrl (Thalweg) 0.00 87.89
D/S Water Surface Elev 0.00 88.26
D/S Grade Ctrl (Thalweg) 14.00 89.03
D/S Water Surface Elev 14.00 89.41
D/S Tailcrest or 1st Thalweg 28.00 88.89
D/S Water Surface Elev 28.00 89.60
Max Pool Depth 32.00 87.94
Outlet Pool Water Elev 32.00 89.59
Outlet Culvert Top 37.00 93.33
Outlet Invert (Bottom of pipe) 37.00 90.39
D/S Water Surface Elev (Water surface at invert out) 37.00 90.87
Inlet Culvert Invert (Bottom of pipe) 97.80 92.21
Inlet Culvert Top 97.80 95.34
U/S Water Surface Elev (Water surface at invert in) 97.80 92.86
U/S Headwater 99.80 93.11
U/S Water Surface Elev 151.80 93.12
U/S Grade Ctrl (Thalweg) (End of riffle) 151.80 92.73

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): 1.92
Comments: No fish caught or observed.
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.92
Comments: No fish caught or observed

Fish Observations

No fish observations occurred during this survey.

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