Fish Passage Site 20501424

Coordinates (dec. deg.): 62.04443°, -150.05978°
Legal Description: S023N004W32
Region: South Central
Road Name: Parks Highway

Datum: NAD83
Quad Name / ITM: Talkeetna A-1
AWC Stream #: 247-41-10200-2226
Stream Name: Susitna River tributary

Elevation:

Site Comments: SUSITNA RIVER WATERSHED

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-MS090

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

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Beaver Activity
  2. Constriction ratio gray

Comments: Beaver dam caused water to back up into upland, water spilling over from multiple points into stream bed. Mainly fed from those new inputs from surrounding stream banks.

Culvert Measurements

ID: 1 Structure Type: Pipe-arch (Structural steel plate) Fish Passage Rating: Green
 
Length(ft): 98.92
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 6.0
Corrugation Width(in.): 2.0
Condition Rating(1-5): 5
Approach Angle: 70.0
Sedimentation At Inlet: No
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):9.8 9.4
Height(ft):6.45 6.3
Apron Length(ft):6.1 6.2
Water Depth(ft):0.0 2.74
Rustline Height(ft):2.7
Substrate Depth(ft):
Backwatered?: Yes
Baffles Present: No
Embedded?: Yes
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.6
Culvert Gradient: 0.45%
Max Slope:
Max Slope Length:
 

Comments: Sediment: Water is too high to get sediment reading.Mittered length: inlet 6.10ft, outlet 6.20 ft.
  Culvert Observations:
  1. Beaver Activity
  2. Constriction ratio gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:OrganicOrganic
Stream Slope(deg.):-0.1
Stream Flow Stage:High
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 43.0 18.80
Downstream ordinary high water 71.0 15.20
Downstream ordinary high water 83.0 15.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
U/S Water Surface Elev (Pond water surface) 0.00 97.44
U/S Thalweg 30.00 93.39
U/S Water Surface Elev 30.00 94.77
D/S Water Surface Elev (Culvert water surface) 70.00 94.79
Inlet Culvert Invert 70.00 92.47
Inlet Culvert Top 70.00 98.92
Outlet Invert 168.92 92.05
Outlet Culvert Top 168.92 98.47
U/S Water Surface Elev (Culvert water surface) 168.92 94.79
D/S Water Surface Elev 268.92 94.79
D/S Thalweg 268.92 92.56

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