Fish Passage Site 20401309

Coordinates (dec. deg.): 61.53751°, -149.23369°
Legal Description: S017N001E26
Region: South Central
Road Name: Alaska Railroad

Datum: NAD83
Quad Name / ITM: Anchorage C-6
AWC Stream #: 247-50-10260-2035
Stream Name: Rabbit Slough

Elevation:

Site Comments: TMP 150.47

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-RS016

Observers: Olof Jacobsson, Edward Weiss, Joe Conner

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: culvert inlet end velocity not taken because of rip rap in channel

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating: Gray
 
Length(ft): 64.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 2
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: Silt/Clay
Outlet Substrate: Silt/Clay
InletOutlet
Width(ft):3.0 3.1
Height(ft):3.0 2.9
Apron Length(ft):
Water Depth(ft):0.7 0.6
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 0.08%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 12.0 20.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Culvert Top 1 78.25
Inlet Culvert Top 1 78.27
OHW Left Bank 84.28
D/S Thalweg 84.37
D/S Thalweg 86.60
Outlet Invert 1 0.00 0.0 84.67
Outlet Thalweg 1 0.00 0.0 84.51
Road Elev 32.00 95.57
Road Elev 32.00 95.87
Inlet Culvert Invert 1 64.00 0.0 84.72
Inlet Thalweg 1 67.00 3.0 84.59

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): 1

Fish Observations

Species: juvenile/adult stickleback-unspecified Life History: Resident
Total Fish Observed: 6 Fish Measured: 2 Fork Lengths (mm) Min: 75 Max: 80 Mean: 77
Collected/Observed by Gear Type: Upstream Minnow Trap (6)  
 
Species: juvenile Chinook salmon Life History: Anadromous
Total Fish Observed: 3 Fish Measured: 1 Fork Lengths (mm) Min: 104 Max: 104 Mean: 104
Collected/Observed by Gear Type: Upstream Minnow Trap (3)  
Comments: I king escaped
 
Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 11 Fish Measured: 5 Fork Lengths (mm) Min: 90 Max: 130 Mean: 106
Collected/Observed by Gear Type: Upstream Minnow Trap (11)  
Comments: 1 coho escaped

Photos

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