Fish Passage Site 20401888

Coordinates (dec. deg.): 61.17599°, -149.78523°
Legal Description: S013N003W34
Region: South Central
Road Name: Radio Tower Access Road

Datum: NAD83
Quad Name / ITM: Anchorage A-8
AWC Stream #: 247-60-10340-2021
Stream Name: North Fork Campbell Creek

Elevation:

Site Comments: Located on the state-owned road leading to the radio tower and DOT maintenance yard in Bicentennial Park.

Survey Date: Sep 15, 2009

Survey UPDATE-RTA01

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red
  2. Culvert gradient red
  3. Inlet perch
  4. Material inadequate for designed use

Comments: Spot velocities taken during survey at low water were 3.12 ft/s at the inlet and 7.46 ft/s at the outlet. Velocities very high in concrete pipe. Debris regularly blocks inlet. Adult salmonid was observed repeatedly trying to enter the pipe and failing. Overflow pipes are rusted through. Two additional overflow pipes above the two small pipes surveyed, not wet during regular flows.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 32.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.66
Condition Rating(1-5): 1
Approach Angle: 31.0
Sedimentation At Inlet: Yes
Inlet Substrate:
Outlet Substrate:
InletOutlet
Width(ft):1.5 1.5
Height(ft):0.9 1.4
Apron Length(ft):
Water Depth(ft): 0.0
Rustline Height(ft):0.9
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.21
Outfall Type: Overflow Pipe
Constriction Ratio: 0.3
Culvert Gradient: 2.84%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Outfall height gray
  2. Culvert gradient red
  3. Constriction ratio red
ID: 2 Structure Type: Circular pipe (Reinforced concrete) Fish Passage Rating: Red
 
Length(ft): 32.7
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.):
Corrugation Width(in.):
Condition Rating(1-5): 5
Approach Angle: 31.0
Sedimentation At Inlet: Yes
Inlet Substrate:
Outlet Substrate:
InletOutlet
Width(ft):3.5 3.5
Height(ft):3.5 3.5
Apron Length(ft):
Water Depth(ft): 0.77
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.3
Culvert Gradient: 1.07%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio red
  2. Inlet perch
ID: 3 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 32.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.66
Condition Rating(1-5): 1
Approach Angle: 31.0
Sedimentation At Inlet: Yes
Inlet Substrate:
Outlet Substrate:
InletOutlet
Width(ft):1.5 1.5
Height(ft):1.0 1.5
Apron Length(ft):
Water Depth(ft): 0.67
Rustline Height(ft):1.0
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.3
Culvert Gradient: 3.50%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Constriction ratio red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClayGravel
Subdominant:Gravel
Stream Slope(deg.):
Stream Flow Stage:Low
Stream Width Type Distance From
Crossing (ft)
Stream
Width (ft)
Upstream ordinary high water 125.0 15.70
Upstream ordinary high water 172.0 13.75
Upstream ordinary high water 220.0 11.00

Elevations

Locator ID Culvert
Number
River
Distance (ft)1
Distance From
Crossing (ft)2
Relative
Elevation (ft)
D/S Grade Ctrl (Thalweg) 0.00 75.0 96.95
D/S Water Surface Elev 0.00 75.0 97.51
D/S Tailcrest or 1st Thalweg 52.50 22.5 97.22
D/S Water Surface Elev (turbulent) 52.50 22.5 97.77
D/S Thalweg (bottom of pool) 66.00 9.0 95.50
D/S Thalweg 70.00 5.0 95.55
Outlet Invert 1 75.00 0.0 97.94
Outlet Pool Water Elev 1 75.00 0.0 97.73
D/S Thalweg 1 75.00 0.0 96.90
Outlet Invert 2 75.00 0.0 96.98
Outlet Pool Water Elev 2 75.00 0.0 97.75
Outlet Pool Water Elev 3 75.00 0.0 97.75
Outlet Invert 3 75.00 0.0 97.47
D/S Thalweg 3 75.00 0.0 96.80
Road Elev 91.00 103.17
Inlet Culvert Invert 2 107.00 0.0 97.33
U/S Headwater 2 107.00 0.0 98.74
Inlet Culvert Invert 1 107.00 0.0 98.85
U/S Headwater 1 107.00 0.0 98.83
U/S Headwater 3 107.00 0.0 98.74
Inlet Culvert Invert 3 107.00 0.0 98.59
U/S Thalweg (u/s top of scour hole @ inlet) 112.50 5.5 98.13
U/S Grade Ctrl (Thalweg) (1st grade pt u/s in thalweg) 119.00 12.0 98.15
U/S Water Surface Elev 119.00 12.0 98.81

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

No fish sampling occurred during this survey.

Fish Observations

No fish observations occurred during this survey.

Questions or comments about this report can be directed to dfg.dsf.webmaster@alaska.gov