Fish Passage Improvement site 50101607

Fish Passage Site 50101607

Coordinates (dec. deg.): 64.90426°, -165.09595°
Legal Description: K007S032W02
Region: Arctic
Road Name: Kougarok Road

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

Elevation:

Site Comments: Mile 36.0

Survey Date: Sep 28, 2005

Survey SEW05-KR19

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:

Inlet perch
Mechanical damage or joints parting
Hydraulic flows exceeded capacity
Outfall height red
Constriction ratio red
Constriction ratio red

Comments: None

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated steel)

Fish Passage Rating: Red

Length(ft): 47.0

Inlet Type: Mitered

Outlet Type: Mitered

Corrugation Depth(in.): 0.75

Corrugation Width(in.): 2.75

Condition Rating(1-5): 3

Approach Angle: 33.0

Sedimentation At Inlet:

Inlet Substrate: None

Outlet Substrate: None

	Inlet	Outlet
Width(ft):	4.8
Height(ft):	4.8
Apron Length(ft):
Water Depth(ft):		1.1
Rustline Height(ft):	0.9
Substrate Depth(ft):		0.0

Backwatered?: No

Baffles Present: No

Embedded?: No

Embedded Depth(ft): 0.0

Outfall Height: 1.67

Outfall Type: Cascade Over Rip-Rap

Constriction Ratio: 0.42

Culvert Gradient: 8.53%

Max Slope:

Max Slope Length:

Comments: Rustline height estimated due to velocity; boulders blocking outlet

Culvert Observations:

Inlet perch
Mechanical damage or joints parting
Hydraulic flows exceeded capacity
Outfall height red
Culvert gradient red
Constriction ratio red

Stream Measurements

Stream Substrates	Upstream	Downstream
Dominant:	Cobble	Cobble
Subdominant:	Gravel	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	132.0	19.90
Upstream bank full	75.0	47.30
Upstream bank full	100.0	45.50
Upstream bank full	125.0	18.40
Upstream bank full	150.0	18.80
Upstream bed width	75.0	7.60
Upstream bed width	100.0	7.40
Upstream bed width	125.0	8.90
Upstream bed width	150.0	11.60
Upstream ordinary high water	75.0	9.10
Upstream ordinary high water	100.0	12.30
Upstream ordinary high water	125.0	10.10
Upstream ordinary high water	150.0	14.30

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
Outlet Pool Water Elev				87.13
U/S Thalweg				94.15
D/S Grade Ctrl (Thalweg)		0.00	132.0	80.70
D/S Tailcrest or 1st Thalweg		45.26	86.74	85.82
OHW (Outlet Tailcrest)		45.26	86.74	24.00
Outlet Invert	1	132.00	0.0	87.70
Road Elev		155.50		103.61
Inlet Culvert Invert	1	179.00	0.0	91.71
U/S Thalweg		189.00	10.0	93.53
U/S Thalweg		244.00	65.0	96.21

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.