Fish Passage Site 20501463

Coordinates (dec. deg.): 62.34392°, -150.06609°
Legal Description: S026N004W17
Region: South Central
Road Name: Cummings Drive

Datum: WGS84
Quad Name / ITM: Talkeetna B-1
AWC Stream #: 247-41-10200-2370-3018
Stream Name: Talkeetna River tributary

Elevation:

Site Comments: None

Survey Date: May 20, 2009

Survey PRK09-CMG01

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient gray
  2. Outfall height red
  3. Constriction ratio red

Comments: Max gradient is in apron. Downstream widths taken below scour from 2006 flood. Resident says that prior to 2006 stream was a deeper, still slough with spawning salmon. Flood washed out road and water level is now several feet lower. *** Updated site photos added from 9/30/16 site visit from Sampling Unmapped in the MSB project. Fish sampling information entered into AFFI ***

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 40.1
Inlet Type: Flared Inlet
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 4
Approach Angle: 4.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.8 4.1
Height(ft):4.0 3.9
Apron Length(ft):6.2
Water Depth(ft): 0.4
Rustline Height(ft):0.2
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.77
Outfall Type: Cascade Over Rip-Rap
Constriction Ratio: 0.21
Culvert Gradient: 0.82%
Max Slope: 6.8
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient gray
  2. Outfall height red
  3. Constriction ratio red
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 40.0
Inlet Type: Flared Inlet
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 4
Approach Angle: 4.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.8 3.9
Height(ft):4.1 4.0
Apron Length(ft):5.8
Water Depth(ft): 0.3
Rustline Height(ft):0.2
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.69
Outfall Type: Cascade Over Rip-Rap
Constriction Ratio: 0.21
Culvert Gradient: 0.50%
Max Slope: 8.1
Max Slope Length:
 

Comments: Max gradient is in apron
  Culvert Observations:
  1. Culvert gradient gray
  2. Outfall height red
  3. Constriction ratio red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClayGravel
Subdominant:CobbleCobble
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 280.0 24.50
Downstream ordinary high water 330.0 25.00
Downstream ordinary high water 360.0 25.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev 2 95.31
Outlet Pool Water Elev 1 95.30
U/S Headwater 2 96.18
U/S Headwater 1 96.21
D/S Grade Ctrl (Thalweg) 0.00 89.0 94.56
D/S Tailcrest or 1st Thalweg 64.20 24.8 95.08
D/S Thalweg (bottom of cascade) 2 84.40 4.6 95.11
D/S Thalweg (bottom of cascade) 1 84.40 4.6 95.03
D/S Thalweg (cascade step) 1 86.30 2.7 95.31
D/S Thalweg (cascade step) 2 87.20 1.8 95.45
Outlet Invert 1 89.00 0.0 95.67
Outlet Invert 2 89.00 0.0 95.70
D/S Water Surface Elev (WS at InvOut) 2 89.00 0.0 95.97
D/S Water Surface Elev (WS at InvOut) 1 89.00 0.0 96.02
Road Elev 109.00 101.65
Inlet Culvert Invert 2 129.00 0.0 95.90
Inlet Culvert Invert 1 129.00 0.0 96.00
U/S Thalweg (middle of apron) 2 131.10 2.1 95.86
U/S Thalweg (middle of apron) 1 131.40 2.4 95.79
U/S Thalweg (end of apron) 2 134.80 5.8 96.16
U/S Thalweg (end of apron) 1 135.20 6.2 96.05
U/S Thalweg (bottom of road fill) 2 143.10 14.1 93.27

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