Fish Passage Site 20401310

Coordinates (dec. deg.): 61.53501°, -149.23474°
Legal Description: S017N001E26
Region: South Central
Road Name: Alaska Railroad

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

Elevation:

Site Comments: None

Survey Date: Aug 08, 2000

Survey MSCS1-RS017

Observers: Edward Weiss, Olof Jacobsson, Joe Conner

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Site Observations:

  1. Outfall height gray
  2. Culvert gradient gray
  3. Mechanical damage or joints parting
  4. Improper bedding
  5. Hydraulic flows exceeded capacity

Comments: Inlet damaged-

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating: Gray
 
Length(ft): 50.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 1
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: Silt/Clay
Outlet Substrate: Gravel
InletOutlet
Width(ft):5.0 5.0
Height(ft):5.0 5.0
Apron Length(ft):
Water Depth(ft):0.24 0.26
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type: Free Fall In To Pool
Constriction Ratio:
Culvert Gradient: 1.90%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Mechanical damage or joints parting
  2. Improper bedding
  3. Outfall height gray
  4. Culvert gradient gray
  5. Hydraulic flows exceeded capacity

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClayGravel
Subdominant:
Stream Slope(deg.):
Stream Flow Stage:Medium

No stream width data available.

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Culvert Top 1 87.95
Inlet Culvert Top 1 88.69
D/S Tailcrest or 1st Thalweg 0.00 42.0 81.87
D/S Thalweg 32.00 10.0 79.13
Outlet Thalweg 1 42.00 0.0 81.50
Outlet Invert 1 42.00 0.0 82.87
Road Elev 67.00 93.92
Road Elev 67.00 94.24
Inlet Thalweg 1 92.00 0.0 83.71
Inlet Culvert Invert 1 92.00 0.0 83.82

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 (B) Trap Duration(h): 3

Fish Observations

Species: juvenile stickleback-unspecified Life History: Resident
Total Fish Observed: 7 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Downstream Minnow Trap (7)  
 
Species: juvenile Chinook salmon Life History: Anadromous
Total Fish Observed: 6 Fish Measured: 3 Fork Lengths (mm) Min: 95 Max: 128 Mean: 110
Collected/Observed by Gear Type: Downstream Minnow Trap (6)  
 
Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 36 Fish Measured: 10 Fork Lengths (mm) Min: 95 Max: 132 Mean: 110
Collected/Observed by Gear Type: Downstream Minnow Trap (36)  

Photos

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