Fish Passage Site 10302195

Coordinates (dec. deg.): 58.41640°, -134.61279°
Legal Description: C040S065E12
Region: Southeast
Road Name: Montana Creek Road

Datum: NAD83
Quad Name / ITM: Juneau B-2
AWC Stream #:
Stream Name: Montana Creek side channel

Elevation:

Site Comments: None

Survey Date: Jun 24, 2011

Survey SEA11-MCR01

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 red

Comments: Culvert carries water from Montana Creek to side channel of Montana Creek, likely cuts back over further downstream. Upstream at confluence, no stream grade.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 50.5
Inlet Type: Mitered
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 3
Approach Angle: 74.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):2.95 3.0
Height(ft):3.1 3.0
Apron Length(ft):
Water Depth(ft): 2.23
Rustline Height(ft):2.1
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: 0.23
Culvert Gradient: 0.61%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient gray
  2. Constriction ratio gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleSand
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 103.0 12.50
Downstream ordinary high water 122.0 13.00
Downstream ordinary high water 152.0 11.40

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 100.00
D/S Water Surface Elev 0.00 97.40
D/S Grade Ctrl (Thalweg) 0.00 96.78
D/S Grade Ctrl (Thalweg) 26.50 97.06
D/S Water Surface Elev 26.50 97.46
D/S Water Surface Elev (Water surface at max pool depth) 35.50 97.47
Max Pool Depth 35.50 94.64
Outlet Invert (on metal) 49.50 95.24
D/S Water Surface Elev 49.50 97.47
Outlet Culvert Top 49.50 98.22
Inlet Culvert Top 99.00 98.57
Inlet Culvert Invert 99.00 95.55
U/S Headwater 99.00 97.40

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.

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