Fish Passage Site 20501181

Coordinates (dec. deg.): 61.76630°, -149.99532°
Legal Description: S019N004W04
Region: South Central
Road Name: Creekside Road

Datum: WGS84
Quad Name / ITM: Anchorage D-8
AWC Stream #: 247-41-10200-2120-3022
Stream Name: Willow Creek Tributary

Elevation:

Site Comments: None

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 MSB09-CRK01

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Shallow fill; inadequate roadfill volume above culvert
  3. Hydraulic flows exceeded capacity

Comments: Bottom of culvert is fully rusted with small holes; no water in pipe - water starts 0.3' u/s and 21' d/s Updated site photos added from 9/16/16 site visit from Sampling Unmapped Streams in the MSB project. Fish sampling data entered into AFFI.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 19.8
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 1
Approach Angle: 10.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):1.5 1.5
Height(ft):1.5 1.5
Apron Length(ft):
Water Depth(ft): 0.0
Rustline Height(ft):1.0
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 2.68%
Max Slope:
Max Slope Length:
 

Comments: Culvert bottom is rusted with holes so no water is flowing through the pipe at a depth which could be measured. Only a minimal amount of water was observed upstream and no water was immediately downstream of outlet until 21' dwst.
  Culvert Observations:
  1. Culvert gradient red
  2. Shallow fill; inadequate roadfill volume above culvert
  3. Hydraulic flows exceeded capacity

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClaySilt/Clay
Subdominant:Silt/ClaySilt/Clay
Stream Slope(deg.):
Stream Flow Stage:Low, Continuous Channel

No stream width data available.

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Water Surface Elev (slough WS) 1 0.00 80.0 96.63
D/S Water Surface Elev (slough WS) 1 59.00 21.0 96.63
D/S Thalweg (high pt before dry chan slopes into slough) 1 62.00 18.0 97.14
D/S Tailcrest or 1st Thalweg (if water were present) 1 77.70 2.3 97.96
D/S Thalweg (bottom of pool, if water were present) 1 78.50 1.5 97.82
Outlet Invert 1 80.00 0.0 97.93
Road Elev 1 89.50 100.78
U/S Headwater (u/s is flat slough) 1 99.80 98.41
Inlet Culvert Invert 1 99.80 0.0 98.46

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): 1.0
Comments: no fish caught; 30ft u/s
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.0
Comments: no fish caught; 50ft d/s

Fish Observations

No fish observations occurred during this survey.

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