Fish Passage Improvement site 20100773

Fish Passage Site 20100773

Coordinates (dec. deg.): 62.46309°, -144.86108°
Legal Description: C008N003E21
Region: South Central
Road Name: Tok Cut-Off

Datum: NAD83
Quad Name / ITM: Gulkana B-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-TOK6

site photos

Project Supervisor: Gillian O'Doherty, ADFG
Observers: Andrew Kastning

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:

Comments: Survey and Photos CRWP. Upstream channel sprawls into wetland area about 100 feet upstream from crossing

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated steel)

Fish Passage Rating: Green

Length(ft): 115.5

Inlet Type: Projecting

Outlet Type: Projecting

Corrugation Depth(in.): 0.5

Corrugation Width(in.): 2.75

Condition Rating(1-5): 3

Approach Angle: 10.0

Sedimentation At Inlet: Yes

Inlet Substrate: Gravel

Outlet Substrate: Gravel

	Inlet	Outlet
Width(ft):	4.75	4.85
Height(ft):	3.62	3.39
Apron Length(ft):
Water Depth(ft):		0.85
Rustline Height(ft):
Substrate Depth(ft):	0.8	0.5

Backwatered?: No

Baffles Present: No

Embedded?: No

Outfall Height: 0.0

Outfall Type: At Stream Grade

Constriction Ratio: 2.03

Culvert Gradient: -0.29%

Max Slope:

Max Slope Length:

Comments: Culvert appears to have been repaired but not replaced since 2002 survey. Uneven substrate at outlet.

Stream Measurements

Stream Substrates	Upstream	Downstream
Dominant:	Silt/Clay	Silt/Clay
Subdominant:	Organic	Organic

Stream Slope(deg.):	2
Stream Flow Stage:

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Downstream ordinary high water		2.50
Downstream ordinary high water		1.80
Downstream ordinary high water		2.70

Elevations

Locator ID	River Distance (ft)¹	Relative Elevation (ft)
Road Elev		100.00
D/S Grade Ctrl (Thalweg)	0.00	84.01
D/S Water Surface Elev	0.00	84.58
D/S Grade Ctrl (Thalweg)	30.00	84.86
D/S Water Surface Elev	30.00	85.36
D/S Water Surface Elev	34.00	85.36
Outlet Invert (Invert on left side, uneven sediment)	34.00	85.05
Outlet Invert (Invert on right side, uneven sediment)	34.00	84.51
Outlet Culvert Top	34.00	88.44
Inlet Culvert Invert	149.50	84.49
Inlet Culvert Top	149.50	88.11
U/S Water Surface Elev	149.50	85.81
U/S Grade Ctrl (Thalweg)	163.50	85.54
U/S Water Surface Elev	163.50	85.90
U/S Water Surface Elev	181.50	85.85
U/S Grade Ctrl (Thalweg)	181.50	83.66
U/S Grade Ctrl (Thalweg)	249.50	85.31
U/S Water Surface Elev	249.50	86.01

Notes:

River distance is measured continuously throughout the survey reach along the thalweg of the stream.
Measured from each end of the crossing along the thalweg of the stream.

Fish Sampling Efforts

Gear Type: Visual Observation, Ground (A)
Comments: Sticklebacks visually observed at site

Fish Observations

Species: stickleback-unspecified		Life History:
Total Fish Observed: 10	Fish Measured:	Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: At Site Visual Observation, Ground (10)
Comments: Sticklebacks visually observed at site

Photos

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