Fish Passage Site 20100608

Coordinates (dec. deg.): 62.61795°, -143.69126°
Legal Description: C010N009E27
Region: South Central
Road Name: Nabesna Road

Datum: NAD83
Quad Name / ITM: Nabesna C-6
AWC Stream #:
Stream Name:

Elevation:

Site Comments: None

Survey Date: Aug 28, 2002

Survey CRB02-NA206

Observers: Dean Beers, James Laurence, James Laurence

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: None

Culvert Measurements

ID: 1 Structure Type:N/A Fish Passage Rating:
 
Length(ft): 41.0
Inlet Type:
Outlet Type:
Corrugation Depth(in.):
Corrugation Width(in.):
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate:
Outlet Substrate:
InletOutlet
Width(ft):6.0
Height(ft):6.0
Apron Length(ft):
Water Depth(ft): 1.0
Rustline Height(ft):0.1
Substrate Depth(ft):
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio: 0.63
Culvert Gradient: -1.20%
Max Slope:
Max Slope Length:
ID: 2 Structure Type:N/A Fish Passage Rating:
 
Length(ft): 41.0
Inlet Type:
Outlet Type:
Corrugation Depth(in.):
Corrugation Width(in.):
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate:
Outlet Substrate:
InletOutlet
Width(ft):6.0
Height(ft):6.0
Apron Length(ft):
Water Depth(ft): 1.5
Rustline Height(ft):0.5
Substrate Depth(ft):
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio: 0.63
Culvert Gradient: -0.88%
Max Slope:
Max Slope Length:

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:
Subdominant:
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 50.0 27.00
Upstream ordinary high water 75.0 16.00
Upstream ordinary high water 100.0 14.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Tailcrest or 1st Thalweg 87.97
Outlet Thalweg 2 0.00 0.0 87.38
Outlet Invert 2 0.00 0.0 87.49
Outlet Thalweg 1 0.00 0.0 87.54
Outlet Invert 1 0.00 0.0 87.73
Inlet Thalweg 2 41.00 0.0 86.75
Inlet Thalweg 1 41.00 0.0 86.98
Inlet Culvert Invert 2 41.00 0.0 87.13
Inlet Culvert Invert 1 41.00 0.0 87.24

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

No fish sampling occurred during this survey.

Fish Observations

No fish observations occurred during this survey.

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