Fish Passage Site 20401288

Coordinates (dec. deg.): 61.62734°, -149.28349°
Legal Description: S018N001E28
Region: South Central
Road Name: Home Built Circle

Datum: NAD83
Quad Name / ITM: Anchorage C-7
AWC Stream #:
Stream Name: Neklason and unnamed lakes

Elevation:

Site Comments: Old crossing site (log bulkhead) 35' upstream of culvert; rootwads with fill on top downstream side of road. Neklason and unnamed lakes

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 MSCS1-CT137

Observers: Edward Weiss, Doug Hill, Joe Conner

Overall Fish Passage Rating:

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: Old crossing site (log bulkhead) 35' upstream of culvert; rootwads with fill on top downstream side of road.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 43.0
Inlet Type: Projecting
Outlet Type:
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: Cobble
Outlet Substrate: Sand
InletOutlet
Width(ft):4.0 4.5
Height(ft):2.6 2.4
Apron Length(ft):
Water Depth(ft):0.7 1.7
Rustline Height(ft):
Substrate Depth(ft):1.4 1.6
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio:
Culvert Gradient:
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Structural Problem
  2. Cut-slope slumping or sliding into culvert (single event)
ID: 2 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating: Gray
 
Length(ft): 43.0
Inlet Type: Projecting
Outlet Type:
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: Cobble
Outlet Substrate: Sand
InletOutlet
Width(ft):4.0 4.5
Height(ft):2.3 2.2
Apron Length(ft):
Water Depth(ft):1.0 1.6
Rustline Height(ft):
Substrate Depth(ft):1.7 1.8
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio: 0.36
Culvert Gradient:
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Structural Problem
  2. Cut-slope slumping or sliding into culvert (single event)

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:
Subdominant:
Stream Slope(deg.):
Stream Flow Stage:High
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 35.0 22.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Culvert Top 1 92.36
Outlet Culvert Top 2 92.51
Inlet Culvert Top 2 93.30
Inlet Culvert Top 1 93.83
Outlet Invert 1 0.00 0.0 89.98
Outlet Invert 2 0.00 0.0 90.05
Road Elev 21.50 95.81
Road Elev 21.50 96.07
Inlet Thalweg 2 43.00 0.0 90.87
Inlet Thalweg 1 43.00 0.0 91.20
U/S Thalweg 1 48.00 5.0 90.63
U/S Thalweg 78.00 35.0 91.45

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: Visual Observation, Ground (C)

Fish Observations

Species: adult coho salmon Life History: Anadromous (Suspected Spawning)
Total Fish Observed: Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Upstream Visual Observation, Ground ()  
Comments: Coho observed moving thru culvert

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