Fish Passage Site 10302154

Coordinates (dec. deg.): 58.30491°, -134.45178°
Legal Description: C041S067E22
Region: Southeast
Road Name: North Douglas Highway

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

Elevation:

Site Comments: None

Survey Date: Jun 19, 2011

Survey SEA11-NDH09

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. Culvert gradient red
  2. Constriction ratio red
  3. Outfall height red
  4. Compound gradient in pipe
  5. Woody Debris
  6. Mechanical damage or joints parting

Comments: No traps set, already in AWC for downstream portion. Inlet damage to pipe. Possible max grade in pipe. Stream smells of sewage, there is a pipe running into the stream from upstream land owners property. Upstream landowner has cleared all foilage from riparian zone and seemingly deposited numerous refuse and garbage in and around stream.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated aluminum) Fish Passage Rating: Red
 
Length(ft): 99.8
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 3
Approach Angle: 23.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):2.0 2.0
Height(ft):1.5 2.0
Apron Length(ft):
Water Depth(ft): 0.1
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 3.32
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.26
Culvert Gradient: 12.91%
Max Slope:
Max Slope Length:
 

Comments: Further failure code: EC (exceeds hydraulic capacity)
  Culvert Observations:
  1. Culvert gradient red
  2. Constriction ratio red
  3. Outfall height red
  4. Compound gradient in pipe
  5. Woody Debris
  6. Mechanical damage or joints parting

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)
Upstream ordinary high water 65.0 7.00
Upstream ordinary high water 115.0 7.00
Upstream ordinary high water 186.0 8.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 119.71
D/S Grade Ctrl (Thalweg) 0.00 92.86
D/S Water Surface Elev 0.00 93.07
D/S Tailcrest or 1st Thalweg (Tailwater control) 11.00 94.27
D/S Water Surface Elev (Tailwater control) 11.00 94.65
Outlet Pool Water Elev 14.00 94.68
Max Pool Depth 14.00 93.00
Outlet Invert 20.00 97.90
D/S Water Surface Elev (Invert out) 20.00 98.00
Outlet Culvert Top 20.00 100.00
Inlet Culvert Invert 119.80 110.78
U/S Water Surface Elev (Invert in) 119.80 112.13
U/S Headwater (Side of invert in) 119.80 112.18
Inlet Culvert Top 119.80 113.67
U/S Grade Ctrl (Thalweg) 126.30 112.66
U/S Water Surface Elev 126.30 112.79

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