Fish Passage Site 40501715

Coordinates (dec. deg.): 65.16128°, -150.12042°
Legal Description: F004N013W24
Region: Interior
Road Name: Elliott Highway

Datum: WGS84
Quad Name / ITM: Tanana A-1
AWC Stream #:
Stream Name: Silverbow Creek

Elevation:

Site Comments: DOT# 3774+70

Survey Date: Jul 09, 2010

Survey EDS10-ELH30

Observers: Mark Eisenman, Justin Leon

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. None of this type

Comments: This culvert appears to be new and embedded. There is good habitat both upstream and downstream of this culvert. While surveying, an adult grayling was seen swimming upstream from downstream of the culvert.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Green
 
Length(ft): 96.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 5
Approach Angle: 1.0
Sedimentation At Inlet: Yes
Inlet Substrate: Boulder
Outlet Substrate: Boulder
InletOutlet
Width(ft):7.2 6.9
Height(ft):4.2 4.9
Apron Length(ft):
Water Depth(ft): 0.79
Rustline Height(ft):0.5
Substrate Depth(ft):2.8 2.1
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 2.1
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 2.21
Culvert Gradient: 2.86%
Max Slope:
Max Slope Length:
 

Comments: The rust line height was measured from the substrate to the rust line.
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleCobble
Stream Slope(deg.):3.73
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 39.0 2.20
Upstream ordinary high water 64.0 3.00
Upstream ordinary high water 98.0 4.30

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev (Road Surface) 105.59
D/S Grade Ctrl (Thalweg) (Thalweg) 0.00 92.34
D/S Water Surface Elev (Water Surface) 0.00 92.51
D/S Tailcrest or 1st Thalweg (Thalweg) 18.00 92.64
D/S Water Surface Elev (Water Surface) 18.00 92.97
Max Pool Depth 35.00 90.69
Outlet Pool Water Elev (Water Surface) 35.00 92.92
Outlet Invert (Thalweg) 46.00 92.12
D/S Water Surface Elev (Water Surface) 46.00 92.91
Outlet Culvert Top (Top of Pipe) 46.00 97.27
U/S Water Surface Elev (Water Surface) 142.00 95.79
Inlet Culvert Invert (Thalweg) 142.00 95.16
Inlet Culvert Top (Top of Pipe) 142.00 100.02
U/S Thalweg (Substrate) 143.00 95.31
U/S Headwater (Water Surface) 143.00 95.79
U/S Grade Ctrl (Thalweg) (Thalweg) 161.00 96.52
U/S Water Surface Elev (Water Surface) 161.00 96.77
U/S Grade Ctrl (Thalweg) (Thalweg) 178.00 97.56
U/S Water Surface Elev (Water Surface) 178.00 97.92
U/S Grade Ctrl (Thalweg) (Thalweg) 204.00 98.31
U/S Water Surface Elev (Water Surface) 204.00 98.65
U/S Grade Ctrl (Thalweg) (Thalweg) 218.00 98.67
U/S Water Surface Elev (Water Surface) 218.00 98.90

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
Channel Type: Main Channel (>50% of water flow)
Comments: Nothing was caught.
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.0
Channel Type: Main Channel (>50% of water flow)
Comments: Nothing was caught.
 
Gear Type: Visual Observation, Ground (C)
Comments: Adult grayling observed D/S of the culvert.

Fish Observations

Species: Arctic grayling Life History: Resident
Total Fish Observed: 1 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Upstream Minnow Trap (1)  
 
Species: adult Arctic grayling Life History: Resident
Total Fish Observed: 1 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Downstream Visual Observation, Ground (1)  
 
Species: no fish collected or observed Life History: Not Applicable
Total Fish Observed: 0 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Downstream Minnow Trap (0)  Upstream Minnow Trap (0)  

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