Fish Passage Site 20501462

Coordinates (dec. deg.): 62.00833°, -149.98599°
Legal Description: S022N004W10
Region: South Central
Road Name: Caswell Lakes Road

Datum: WGS84
Quad Name / ITM: Talkeetna Mts A-6
AWC Stream #: 247-41-10200-2190
Stream Name: Caswell 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 PRK09-CLR02

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

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Site Observations:

  1. Culvert gradient gray
  2. Constriction ratio gray
  3. Mechanical damage or joints parting

Comments: None

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 49.1
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 2
Approach Angle: 15.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):5.5 5.9
Height(ft):2.9 3.2
Apron Length(ft):
Water Depth(ft): 0.22
Rustline Height(ft):0.3
Substrate Depth(ft):0.8 0.5
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.71
Culvert Gradient: 1.65%
Max Slope:
Max Slope Length:
 

Comments: No flow through pipe 1.
  Culvert Observations:
  1. Culvert gradient red
  2. Constriction ratio gray
  3. Mechanical damage or joints parting
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 50.2
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 3
Approach Angle: 15.0
Sedimentation At Inlet: No
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):5.8 5.8
Height(ft):3.9 3.6
Apron Length(ft):
Water Depth(ft): 0.84
Rustline Height(ft):1.4
Substrate Depth(ft):0.4 0.3
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.71
Culvert Gradient: -0.04%
Max Slope:
Max Slope Length:
 

Comments: Pipe 2 has all flow for site; CR for pipe 2 alone is 0.51; joints separating near inlet of pipe 2
  Culvert Observations:
  1. Constriction ratio gray
  2. Mechanical damage or joints parting

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleCobble
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 90.0 11.00
Upstream ordinary high water 145.0 11.00
Upstream ordinary high water 190.0 12.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev (still pool, no flow through pipe) 1 95.90
Outlet Pool Water Elev 2 96.25
U/S Headwater 2 96.58
D/S Grade Ctrl (Thalweg) 0.00 122.0 94.96
D/S Water Surface Elev 0.00 122.0 95.36
D/S Tailcrest or 1st Thalweg (grade pt in outlet riffle) 109.00 13.0 95.53
D/S Water Surface Elev (ws @ TWC) 109.00 13.0 95.93
D/S Thalweg 117.00 5.0 95.58
D/S Water Surface Elev (ws @ GP) 2 117.50 4.5 96.60
Outlet Invert 2 122.00 0.0 95.41
Outlet Invert 1 122.00 0.0 95.68
Road Elev 146.50 101.24
Inlet Culvert Invert 1 171.00 0.0 96.49
Inlet Culvert Invert 2 171.00 0.0 95.39
U/S Thalweg (crest of rocks at inlet) 1 173.50 2.5 96.56
U/S Grade Ctrl (Thalweg) 2 175.50 4.5 95.65

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