Fish Passage Site 20401270

Coordinates (dec. deg.): 61.63292°, -149.27370°
Legal Description: S018N001E21
Region: South Central
Road Name: Private- Camp Challenge Christ

Datum: NAD83
Quad Name / ITM: Anchorage C-7
AWC Stream #:
Stream Name: Neklason Lake Tributary

Elevation:

Site Comments: Creek just west Camp Challenge/culvert beneath camp trail nearst lake at top of steep grade. Culvert crossing is at top of steep grade, stream begins drop off hill/moraine approximately 30' downstream

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-CT113

Observers: Edward Weiss, Doug Hill, Joe Conner

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Constriction ratio red
  3. Hydraulic flows exceeded capacity

Comments: Culvert crossing is @ top of streep grade, stream begins drop off hill/moraine approximately 30' downstream. Upstream substrate type includes Fine Gravel.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating: Red
 
Length(ft): 17.0
Inlet Type: Projecting
Outlet Type:
Corrugation Depth(in.): 0.5
Corrugation Width(in.):
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: Sand
Outlet Substrate: Gravel
InletOutlet
Width(ft):1.5 2.0
Height(ft):1.1 1.7
Apron Length(ft):
Water Depth(ft):0.7 0.3
Rustline Height(ft):
Substrate Depth(ft):0.9 0.3
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio: 0.4
Culvert Gradient: 3.53%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Constriction ratio red
  3. Hydraulic flows exceeded capacity

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:SandGravel
Subdominant:
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 50.0 2.80
Downstream ordinary high water 94.0 2.40
Upstream ordinary high water 48.0 4.00
Upstream ordinary high water 100.0 5.70

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Culvert Top 1 94.93
Inlet Culvert Top 1 94.96
D/S Thalweg 0.00 94.0 84.38
D/S Thalweg 44.00 50.0 89.28
D/S Thalweg 80.70 13.3 92.56
D/S Thalweg 89.80 4.2 92.59
Outlet Invert 1 94.00 0.0 93.23
Outlet Thalweg 1 94.00 0.0 93.23
Road Elev 102.50 95.56
Road Elev 102.50 95.81
Inlet Culvert Invert 1 111.00 0.0 93.83
Inlet Thalweg 1 111.00 0.0 93.83
U/S Thalweg 159.00 48.0 94.48
U/S Thalweg 211.00 100.0 90.83

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: Minnow Trap (A) Trap Duration(h): 0
 
Gear Type: Minnow Trap (B) Trap Duration(h): 2

Fish Observations

Species: no fish collected or observed Life History: Not Applicable
Total Fish Observed: 0 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Downstream Minnow Trap (0)  Upstream Minnow Trap (0)  

Photos

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