Fish Passage Site 20501080

Coordinates (dec. deg.): 61.58775°, -149.72284°
Legal Description: S017N003W01
Region: South Central
Road Name: Cannon Drive

Datum: NAD83
Quad Name / ITM: Anchorage C-8
AWC Stream #:
Stream Name:

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-MS073

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio gray
  2. Outfall height gray
  3. Compound gradient in pipe

Comments: Both pipes are damaged at the outlet. Inlet side leads to culvert under railroad, railroad culvert is severely perched.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 21.59
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 3
Approach Angle: 45.0
Sedimentation At Inlet: No
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):1.45 1.43
Height(ft):1.55 1.46
Apron Length(ft):
Water Depth(ft):0.0 0.51
Rustline Height(ft):2.25
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.22
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.27
Culvert Gradient: 0.44%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Outfall height gray
  2. Constriction ratio gray
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 22.37
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 2
Approach Angle: 45.0
Sedimentation At Inlet: No
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):2.0 1.83
Height(ft):1.98 1.97
Apron Length(ft):
Water Depth(ft):0.0 0.54
Rustline Height(ft):1.3
Substrate Depth(ft):0.0 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: 0.27
Culvert Gradient: 0.90%
Max Slope:
Max Slope Length:
 

Comments: Culvert #2 is inlet is perched. Drop in gradient in #2 inlet (within pipe). Culvert #2 is 2 pipes put together (new fitted with old).
  Culvert Observations:
  1. Compound gradient in pipe
  2. Constriction ratio gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicGravel
Subdominant:SandSand
Stream Slope(deg.):0.78
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 43.0 11.70
Downstream ordinary high water 65.0 7.40
Downstream ordinary high water 80.0 5.90

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Thalweg 0.00 92.92
D/S Water Surface Elev 0.00 94.64
D/S Water Surface Elev 60.00 95.02
D/S Thalweg 60.00 94.46
Max Pool Depth 98.00 94.68
D/S Water Surface Elev (Outlet pool water surface) 98.00 95.57
D/S Water Surface Elev 2 100.00 95.67
D/S Water Surface Elev 1 100.00 95.79
Top of Pipe Outlet 1 100.00 96.72
Outlet Invert 2 100.00 95.13
Outlet Invert 1 100.00 95.28
Outlet Culvert Top 2 100.00 97.07
Inlet Culvert Top 1 120.39 96.81
U/S Water Surface Elev 1 121.59 96.19
Inlet Culvert Invert 1 121.59 95.29
Inlet Culvert Invert 2 122.37 95.26
U/S Water Surface Elev 2 122.37 96.29
Inlet Culvert Top 2 122.37 97.27
U/S Water Surface Elev 126.37 96.25
U/S Thalweg 126.37 94.27
U/S Thalweg 222.37 94.86
U/S Water Surface Elev 222.37 96.39

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