Fish Passage Site 20501160

Coordinates (dec. deg.): 61.58410°, -149.64764°
Legal Description: S017N002W09
Region: South Central
Road Name: Alaska Railroad

Datum: WGS84
Quad Name / ITM: Anchorage C-8
AWC Stream #:
Stream Name: Wetland connector

Elevation:

Site Comments: AKRR MP 166.78 Wetland connector

Survey Date: Aug 25, 2009

Survey MSB09-ARR03

Project Supervisor: Gillian O'Doherty, ADFG
Observers: Heidi Zimmer, Ben Histand

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Culvert is poorly aligned
  3. Sediment accumulation
  4. Mechanical damage or joints parting

Comments: Pile of sand nearly fills pipe near inlet; pipe collapsed ~15' u/s of outlet.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Red
 
Length(ft): 51.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 1
Approach Angle: 50.0
Sedimentation At Inlet: Yes
Inlet Substrate: Silt/Clay
Outlet Substrate: Silt/Clay
InletOutlet
Width(ft):3.0 3.0
Height(ft):3.0 2.6
Apron Length(ft):
Water Depth(ft): 0.7
Rustline Height(ft):1.7
Substrate Depth(ft):0.1 0.4
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 2.14%
Max Slope:
Max Slope Length:
 

Comments: Pipe collapsed about 15 up from outlet.
  Culvert Observations:
  1. Culvert gradient red
  2. Culvert is poorly aligned
  3. Sediment accumulation
  4. Mechanical damage or joints parting

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClaySilt/Clay
Subdominant:Silt/ClaySilt/Clay
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 Pool Water Elev 1 96.71
U/S Headwater (lower than invert in - no flow into pipe) 1 96.96
Outlet Invert 1 0.00 0.0 96.01
Road Elev ((railroad)) 1 25.50 104.85
Inlet Culvert Invert 1 51.00 0.0 97.10
U/S Thalweg 1 51.00 0.0 96.95

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): 0.67
Comments: 70ft u/s
 
Gear Type: Minnow Trap (B) Trap Duration(h): 0.67
Comments: no fish caught; 70ft d/s

Fish Observations

Species: stickleback-unspecified Life History: Resident
Total Fish Observed: 2 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Upstream Minnow Trap (2)  
 
Species: no fish collected or observed Life History: Not Applicable
Total Fish Observed: 0 Fish Measured: 0 Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type:

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