Fish Passage Site 20501473

Coordinates (dec. deg.): 62.18156°, -150.51703°
Legal Description: S024N007W11
Region: South Central
Road Name: Oil Well Road

Datum: WGS84
Quad Name / ITM: Talkeetna A-2
AWC Stream #:
Stream Name: Unnamed

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 UPDATE-OWR02

Project Supervisor: Gillian O'Doherty, ADFG
Observers: Gillian O'Doherty, Mark Eisenman

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year: 2014


Site Observations:

  1. Culvert is poorly aligned

Comments: ***Updated photos and fish sampling information added from 9/7/16 site visit from Sampling Unmapped Streams in the MSB project. Pike found upstream and downstream of culvert.*** Replaced in 2014, resuveyed Oct 21, 2015. Channel is lower at outlet than designed. Downstream rootwads installed high with rock in front and back. Gaps between rootwads upstream and willow brush layers looked to have failed to establish. Some aggradation at inlet, mostly rip rap. Erosion control at inlet too small and not angular, falling into pipe. Ditch armoring encroches on about a third of the channel at inlet. **Updated photos and fish sampling information added from 9/7/16 site visit from Sampling Unmapped Streams in the MSB project. Pike found upstream and downstream of culvert.

Culvert Measurements

ID: 1 Structure Type: Pipe-arch (Structural aluminum plate) Fish Passage Rating: Green
 
Length(ft): 65.4
Inlet Type: Headwall
Outlet Type: Headwall
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 5
Approach Angle: 75.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: Boulder
InletOutlet
Width(ft):9.8 9.8
Height(ft):4.8 4.9
Apron Length(ft):
Water Depth(ft): 0.94
Rustline Height(ft):
Substrate Depth(ft):1.7 1.6
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 1.6
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.18
Culvert Gradient: 4.04%
Max Slope:
Max Slope Length:
 

Comments: Water surface gradient through culvert is 4.34%, substrate gradient 4.95%

  Culvert Observations:
  1. Culvert is poorly aligned

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleCobble
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)
Stream
Width (ft)
Downstream ordinary high water 100.0 9.00
Downstream ordinary high water 200.0 7.90
Upstream ordinary high water 100.0 9.50
Upstream ordinary high water 200.0 7.50
Upstream ordinary high water 300.0 8.90

Elevations

Locator ID Culvert
Number
River
Distance (ft)1
Distance From
Crossing (ft)2
Relative
Elevation (ft)
Road Elev 113.06
D/S Thalweg (riffle) 0.00 90.09
D/S Water Surface Elev 0.00 90.52
D/S Thalweg (riffle) 12.00 90.20
D/S Water Surface Elev 12.00 90.82
Max Pool Depth (Plunge pool below log step) 29.00 90.02
D/S Water Surface Elev 29.00 91.11
D/S Grade Ctrl (Thalweg) (Log step) 32.00 91.81
D/S Water Surface Elev 32.00 92.02
D/S Thalweg (End of rip rap) 50.00 92.07
D/S Water Surface Elev 50.00 92.44
D/S Thalweg (Middle of rootwads) 74.00 92.61
D/S Water Surface Elev 74.00 93.06
Max Pool Depth 90.00 92.64
Outlet Pool Water Elev 90.00 93.31
Outlet Invert (On substrate) 92.00 92.58
D/S Water Surface Elev 92.00 93.52
Outlet Culvert Top (On top of collar above center bolt) 92.00 98.52
Inlet Culvert Invert (on substrate) 157.40 95.82
Split into USWS and DSWS 157.40 96.36
Inlet Culvert Top (top of collar above center bolt) 157.40 101.16
U/S Thalweg (bottom of inlet riffle) 161.40 96.27
Split into USWS and DSWS 161.40 96.57
U/S Grade Ctrl (Thalweg) (rock step (rip rap)) 173.40 96.84
Split into USWS and DSWS 173.40 97.22
U/S Grade Ctrl (Thalweg) (rock step (rip rap)) 190.40 97.91
Split into USWS and DSWS 190.40 98.41
U/S Grade Ctrl (Thalweg) (Top of step (top of inlet riffle)) 204.40 98.58
Split into USWS and DSWS 204.40 98.97
U/S Thalweg (Pool) 210.40 98.39
Split into USWS and DSWS 210.40 98.91
U/S Grade Ctrl (Thalweg) (Top of riffle) 237.40 99.73
Split into USWS and DSWS 237.40 99.96

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
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.0
Comments: No fish caught.
 
Gear Type: Smith-Root LR-24 (C)
Comments: Site sampled 9/7/16.
 
Gear Type: Smith-Root LR-24 (D)
Comments: Site sampled 9/7/16

Fish Observations

Species: juvenile/adult northern pike Life History: Resident
Total Fish Observed: 2 Fish Measured: 2 Fork Lengths (mm) Min: 124 Max: 160 Mean: 142
Collected/Observed by Gear Type: Downstream Smith-Root LR-24 (1)  Upstream Smith-Root LR-24 (1)  
Comments: No fish caught or observed.

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