Fish Passage Site 10302172

Coordinates (dec. deg.): 58.40497°, -134.55069°
Legal Description: C040S066E17
Region: Southeast
Road Name: Glacier Spur Road

Datum: NAD83
Quad Name / ITM: Juneau B-2
AWC Stream #:
Stream Name: Mendenhall River tributary

Elevation:

Site Comments: None

Survey Date: Jun 10, 2011

Survey SEA11-MGR04

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
  3. Debris Flow

Comments: Low water levels. Creek was dry in some areas upstream at time of survey, downstream as well. Nice deep pool structures present upstream and downstream with debris dams present as well. Stream may be connected to MGR03, No traps were set as stream is already in AWC.

Culvert Measurements

ID: 1 Structure Type: Oval (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 109.4
Inlet Type: Projecting
Outlet Type: Flared Inlet
Corrugation Depth(in.): 0.375
Corrugation Width(in.): 2.75
Condition Rating(1-5): 3
Approach Angle: 54.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):4.6 4.5
Height(ft):3.3 3.3
Apron Length(ft): 5.0
Water Depth(ft): 1.08
Rustline Height(ft):0.9
Substrate Depth(ft):0.0 0.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.65
Culvert Gradient: 0.91%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient gray
  2. Constriction ratio gray
  3. Debris Flow

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:Silt/ClayOrganic
Stream Slope(deg.):
Stream Flow Stage:Low
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 72.0 7.00
Upstream ordinary high water 134.0 5.00
Upstream ordinary high water 164.0 9.10

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 100.82
D/S Water Surface Elev 0.00 94.39
D/S Grade Ctrl (Thalweg) 0.00 94.10
D/S Tailcrest or 1st Thalweg (Dry, tailwater control) 9.00 94.41
Outlet Pool Water Elev 29.00 94.29
Max Pool Depth 29.00 93.46
D/S Water Surface Elev 31.00 94.32
D/S Grade Ctrl (Thalweg) (Sediment on apron at end of apron, invert out) 31.00 93.23
Outlet Invert (Invert out, on metal, BOP) 36.00 93.23
D/S Water Surface Elev (Invert out) 36.00 94.31
U/S Headwater (Invert in w/s, dry) 144.40 94.31
Inlet Culvert Invert (Invert in, on metal, BOP) 144.40 94.23

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.

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