Fish Passage Site 20503780

Coordinates (dec. deg.): 61.52926°, -149.60126°
Legal Description: S017N002W26
Region: South Central
Road Name: W Birch Harbor Dr

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

Elevation:

Site Comments: Tipton Park Access

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-MS041

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

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient gray
  2. Constriction ratio gray

Comments: Observed a large dolly, did not catch any.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Gray
 
Length(ft): 20.05
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle: 10.0
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):3.0 3.0
Height(ft):2.75 3.0
Apron Length(ft):
Water Depth(ft):0.0 0.73
Rustline Height(ft):0.9
Substrate Depth(ft):0.3 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.3
Culvert Gradient: 0.55%
Max Slope:
Max Slope Length:
 

Comments: Used W/S to calculate culvert gradient because inlet top was lower then outlet top of pipe. Resurveyed 3x to confirm.
  Culvert Observations:
  1. Culvert gradient gray
  2. Constriction ratio gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicSilt/Clay
Subdominant:Silt/ClayOrganic
Stream Slope(deg.):0.81
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 8.0 10.50
Upstream ordinary high water 15.0 12.00
Upstream ordinary high water 26.0 10.80
Upstream ordinary high water 67.0 7.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 96.70
U/S Thalweg 0.00 94.21
U/S Water Surface Elev 0.00 94.69
U/S Water Surface Elev 20.00 92.45
U/S Thalweg 20.00 92.63
U/S Thalweg 50.00 92.61
U/S Water Surface Elev 50.00 93.33
U/S Water Surface Elev 100.00 93.21
Inlet Culvert Top 100.00 95.02
Inlet Culvert Invert 100.00 92.31
Outlet Invert 120.05 92.37
Outlet Culvert Top 120.05 95.31
D/S Water Surface Elev 120.05 93.10
D/S Water Surface Elev 207.05 93.14
D/S Thalweg 207.05 92.01
D/S Thalweg 232.05 91.98
D/S Water Surface Elev 232.05 92.82

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 (A) Trap Duration(h): 1.1666666
Channel Type: Main Channel (>50% of water flow)
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.1666666
Channel Type: Main Channel (>50% of water flow)

Fish Observations

Species: juvenile Dolly Varden Life History:
Total Fish Observed: 1 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Downstream Minnow Trap (0)  Upstream Minnow Trap (1)  

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