Fish Passage Site 20501233

Coordinates (dec. deg.): 61.58220°, -149.57127°
Legal Description: S017N002W11
Region: South Central
Road Name: Suzanna Street

Datum: WGS84
Quad Name / ITM: Anchorage C-7
AWC Stream #:
Stream Name: Unnamed pond outlet

Elevation:

Site Comments: None

Survey Date: Aug 19, 2009

Survey MSB09-SUZ01

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. Compound gradient in pipe
  3. Hydraulic flows exceeded capacity
  4. Mechanical damage or joints parting
  5. Shallow fill; inadequate roadfill volume above culvert

Comments: Pipe bent; max gradient greater than 6.63%; no fish caught. Pond upstream of culvert.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 40.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 2
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: Gravel
InletOutlet
Width(ft):1.7 1.7
Height(ft):1.2 1.0
Apron Length(ft):
Water Depth(ft): 0.32
Rustline Height(ft):0.5
Substrate Depth(ft): 0.3
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 6.63%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Compound gradient in pipe
  3. Hydraulic flows exceeded capacity
  4. Mechanical damage or joints parting
  5. Shallow fill; inadequate roadfill volume above culvert

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 96.80
U/S Headwater (u/s is pond) 1 99.29
D/S Grade Ctrl (Thalweg) 1 0.00 8.5 96.07
D/S Water Surface Elev (@GP) 1 0.00 8.5 96.25
D/S Tailcrest or 1st Thalweg 1 7.50 1.0 96.56
D/S Water Surface Elev (@TWC) 1 7.50 1.0 96.78
Outlet Invert (on substrate) 1 8.50 0.0 96.48
Road Elev 1 28.50 100.39
U/S Thalweg 1 48.50 0.0 98.66
Inlet Culvert Invert 1 48.50 0.0 99.13

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): 1.5
Comments: no fish caught; 10ft u/s
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.5
Comments: no fish caught; 150ft d/s

Fish Observations

No fish observations occurred during this survey.

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