Fish Passage Site 20501474

Coordinates (dec. deg.): 62.19159°, -150.49500°
Legal Description: S024N007W11
Region: South Central
Road Name: Oil Well Road

Datum: WGS84
Quad Name / ITM: Talkeetna A-1
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: None

Survey Date: Jun 27, 2009

Survey PRK09-OWR03

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

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio gray

Comments: **Updated site photos added from 9/7/16 site visit from Sampling Unmapped Streams in the MSB project. Fish sampling information entered into AFFI.*** Sandbag headwalls; local resident says pipe made from 1/2 of old water tank; pipe slope calc'd based on inverts.

Culvert Measurements

ID: 1 Structure Type: Open-bottom arch (Non-corrugated metal) Fish Passage Rating: Gray
 
Length(ft): 26.9
Inlet Type: Headwall
Outlet Type: Headwall
Corrugation Depth(in.):
Corrugation Width(in.):
Condition Rating(1-5): 3
Approach Angle: 21.0
Sedimentation At Inlet: No
Inlet Substrate: Cobble
Outlet Substrate: Gravel
InletOutlet
Width(ft):6.0 6.0
Height(ft):4.0 3.5
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.89
Rustline Height(ft):
Substrate Depth(ft):
Backwatered?: Yes
Baffles Present: No
Embedded?: Yes
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.65
Culvert Gradient: 1.15%
Max Slope:
Max Slope Length:
 

Comments: U/S gradient 2.14%; pipe slope calc'd based on inverts.
  Culvert Observations:
  1. Constriction ratio gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleCobble
Stream Slope(deg.):1.18
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 40.0 10.00
Upstream ordinary high water 86.0 8.50
Upstream ordinary high water 113.0 9.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
U/S Headwater 1 96.65
Outlet Pool Water Elev 1 96.66
D/S Water Surface Elev 1 0.00 87.0 98.46
D/S Water Surface Elev 1 39.00 48.0 98.28
D/S Grade Ctrl (Thalweg) 1 46.00 41.0 96.14
D/S Water Surface Elev 1 46.00 41.0 96.35
D/S Water Surface Elev 1 70.00 17.0 97.15
D/S Water Surface Elev 1 79.50 7.5 96.76
D/S Tailcrest or 1st Thalweg 1 80.00 7.0 96.54
D/S Water Surface Elev 1 80.00 7.0 96.65
D/S Thalweg 1 85.00 2.0 95.87
Outlet Invert (thalweg at end of pipe) 1 87.00 0.0 95.77
Road Elev 1 100.00 101.89
Inlet Culvert Invert (thalweg at end of pipe) 1 113.00 0.0 95.58
U/S Grade Ctrl (Thalweg) (u/s GP) 1 120.50 7.5 96.51
U/S Grade Ctrl (Thalweg) (u/s GP) 1 130.00 17.0 97.01
U/S Grade Ctrl (Thalweg) (u/s GP) 1 161.00 48.0 98.15
U/S Grade Ctrl (Thalweg) (u/s GP) 1 200.00 87.0 98.40

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

Gear Type: Minnow Trap (A) Trap Duration(h): 1.0
Comments: no fish caught; 100ft u/s
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.0
Comments: no fish caught; 100ft d/s

Fish Observations

No fish observations occurred during this survey.

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