Fish Passage Improvement site 50101612

Fish Passage Site 50101612

Coordinates (dec. deg.): 64.84193°, -165.26117°
Legal Description: K007S033W36
Region: Arctic
Road Name: Kougarok Road

Datum: NAD83
Quad Name / ITM: Nome D-1
AWC Stream #:
Stream Name:

Elevation:

Site Comments: Mile 27.8

Survey Date: Sep 28, 2005

Survey SEW05-KR24

site photos

Project Supervisor: Dave Ryland,
Observers: Dave Ryland, Jason Cheney, Paul Thompson

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:

Site Observations:

Culvert is poorly aligned
Hydraulic flows exceeded capacity
Culvert gradient gray
Constriction ratio red
Inlet perch

Comments: None

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated steel)

Fish Passage Rating: Red

Length(ft): 60.5

Inlet Type: Mitered

Outlet Type: Mitered

Corrugation Depth(in.): 0.75

Corrugation Width(in.): 2.75

Condition Rating(1-5): 3

Approach Angle: 30.0

Sedimentation At Inlet: Yes

Inlet Substrate: None

Outlet Substrate: None

	Inlet	Outlet
Width(ft):	6.0
Height(ft):	6.0
Apron Length(ft):
Water Depth(ft):		1.4
Rustline Height(ft):	2.0
Substrate Depth(ft):	0.0	0.0

Backwatered?: No

Baffles Present: No

Embedded?: No

Embedded Depth(ft): 0.0

Outfall Height: 0.3

Outfall Type: Cascade Over Rip-Rap

Constriction Ratio: 0.15

Culvert Gradient: 1.62%

Max Slope:

Max Slope Length:

Comments: rustline height estimated, water vel too high in pipe;

Culvert Observations:

Culvert is poorly aligned
Hydraulic flows exceeded capacity
Culvert gradient gray
Constriction ratio red
Inlet perch

Stream Measurements

Stream Substrates	Upstream	Downstream
Dominant:	Cobble	Cobble
Subdominant:	Cobble	Cobble

Stream Slope(deg.):
Stream Flow Stage:

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Downstream ordinary high water
Downstream ordinary high water	200.0	63.20
Upstream bank full	75.0	184.50
Upstream bank full	100.0	148.00
Upstream bank full	125.0	181.20
Upstream bank full	150.0	156.60
Upstream bed width	75.0	54.30
Upstream bed width	100.0	41.30
Upstream bed width	125.0	39.90
Upstream bed width	150.0	37.60
Upstream ordinary high water	75.0	92.50
Upstream ordinary high water	100.0	63.80
Upstream ordinary high water	125.0	56.80
Upstream ordinary high water	150.0	54.80

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
Outlet Pool Water Elev				91.03
U/S Thalweg				94.00
D/S Grade Ctrl (Thalweg)		0.00	200.0	84.05
D/S Grade Ctrl (Thalweg)		100.00	100.0	86.61
D/S Grade Ctrl (Thalweg)		182.00	18.0	88.23
D/S Grade Ctrl (Thalweg)		182.00	18.0	88.93
OHW (Outlet Tailcrest)		182.00	18.0	90.32
Outlet Invert	1	200.00	0.0	89.93
Road Elev		230.00		102.30
Inlet Culvert Invert	1	260.00	0.0	90.91
U/S Thalweg		272.00	12.0	91.54
U/S Thalweg		284.00	24.0	93.27
U/S Thalweg		335.00	75.0	93.32
U/S Thalweg		410.00	150.0	94.92

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.