Fish Passage Site 40601682

Coordinates (dec. deg.): 67.43689°, -150.08586°
Legal Description: F030N011W07
Region: Interior
Road Name: Dalton Highway

Datum: NAD83
Quad Name / ITM: Wiseman B-1
AWC Stream #:
Stream Name: Union Gulch

Elevation:

Site Comments: PLMP 224.33. confluence koyukuk immed d/s.

Survey Date: Aug 23, 2010

Survey EDS10-DAL22

Observers: Gillian O'Doherty, Ben Histand

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Mechanical damage or joints parting

Comments: PLMP 224.33 Union Gulch. Fish vis obs u/s in pool, probably grayling and stickleback; confluence koyukuk immed d/s. outlet backwatered by river

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 100.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle:
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: Sand
InletOutlet
Width(ft):6.0 5.4
Height(ft):6.0 5.0
Apron Length(ft):
Water Depth(ft): 1.98
Rustline Height(ft):3.0
Substrate Depth(ft):0.0 1.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.51
Culvert Gradient: -0.09%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Mechanical damage or joints parting

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicGravel
Subdominant:Silt/ClaySand
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)
Stream
Width (ft)
Upstream ordinary high water 11.00
Upstream ordinary high water 12.00
Upstream ordinary high water 12.00

Elevations

Locator ID Culvert
Number
River
Distance (ft)1
Distance From
Crossing (ft)2
Relative
Elevation (ft)
D/S Grade Ctrl (Thalweg) 0.00 87.73
D/S Water Surface Elev 0.00 87.97
D/S Water Surface Elev (ws @ outlet - still, =TWS) 18.00 87.98
Outlet Culvert Top 18.00 91.31
Outlet Invert 18.00 86.00
Inlet Culvert Top 118.00 91.87
Inlet Culvert Invert 118.00 85.91
U/S Headwater (still, =ws @ inlet) 118.00 87.98
U/S Water Surface Elev 130.00 87.98
U/S Thalweg (pond bed slopes down) 130.00 85.63

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: (A)
Comments: fish vis obs u/s in pool, probably grayling and stickleback

Fish Observations

Species: general fish observation, no species information Life History: Not Recorded
Total Fish Observed: 2 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: (2)  
Comments: probably grayling and stickleback

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