Fish Passage Site 20503779

Coordinates (dec. deg.): 61.52872°, -149.59915°
Legal Description: S017N002W26
Region: South Central
Road Name: West Birch Harbor Drive

Datum: NAD83
Quad Name / ITM: Anchorage C-7
AWC Stream #: 247-50-10305
Stream Name: Crocker Creek

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 MSB23-MS039

Project Supervisor: Michael Mazzacavallo, Alaska Department of Fish and Game — Anchorage, AK
Observers: Michael Mazzacavallo, Kat Leavitt, Beth Evers

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red
  2. Culvert gradient gray
  3. Inlet perch

Comments: Stream forks off into pool that drains into a small culvert and feeds into main inlet.Traps were placed for fish, zero fish were caught.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated aluminum) Fish Passage Rating: Red
 
Length(ft): 59.96
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 5
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: Silt/Clay
Outlet Substrate: Gravel
InletOutlet
Width(ft):3.0 3.0
Height(ft):3.0 2.6
Apron Length(ft):
Water Depth(ft):0.0 0.52
Rustline Height(ft):0.8
Substrate Depth(ft):0.0 0.2
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.29
Culvert Gradient: 4.49%
Max Slope:
Max Slope Length:
 

Comments: The length of the pipe is made of two pipes at the inlet (5.2ft CIR), the remainder is structural plated round pipe. The 5.2ft inlet section is installed at a steeper gradient causing a hydrolic jump near the inlet.
  Culvert Observations:
  1. Constriction ratio red
  2. Culvert gradient gray
  3. Inlet perch

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClayGravel
Subdominant:Silt/ClayGravel
Stream Slope(deg.):2.96
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 11.0 9.70
Upstream ordinary high water 21.0 13.60
Upstream ordinary high water 49.0 10.60
Upstream ordinary high water 72.0 7.40

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 99.71
U/S Water Surface Elev 0.00 94.56
U/S Thalweg 0.00 94.10
U/S Thalweg 29.00 93.59
U/S Water Surface Elev 29.00 94.28
U/S Water Surface Elev 45.00 94.19
U/S Thalweg 45.00 93.44
U/S Water Surface Elev 90.00 93.10
U/S Thalweg 90.00 92.41
Inlet Culvert Invert 116.00 92.15
U/S Water Surface Elev 116.00 92.76
Inlet Culvert Top 116.00 95.05
Outlet Culvert Top 171.96 92.54
Outlet Invert 171.96 89.93
D/S Water Surface Elev 171.96 90.45
D/S Thalweg 188.96 88.82
D/S Water Surface Elev 188.96 89.57
D/S Thalweg 217.96 87.68
D/S Water Surface Elev 217.96 88.29
D/S Thalweg 247.96 86.83
D/S Water Surface Elev 247.96 87.51
D/S Thalweg 291.96 85.57
D/S Water Surface Elev 291.96 85.92

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
Channel Type: Main Channel (>50% of water flow)
Comments: Zero fish caught, trap placed 7 feet downstream
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.0
Channel Type: Main Channel (>50% of water flow)
Comments: Zero fish caught in traps, trap was placed 7ft upstream.
 
Gear Type: Minnow Trap (C) Trap Duration(h): 1.0
Channel Type: Main Channel (>50% of water flow)
Comments: 2 fish traps were placed in connecting pond, zero caught.

Fish Observations

No fish observations occurred during this survey.

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