Fish Passage Improvement site 50101600

Fish Passage Site 50101600

Coordinates (dec. deg.): 64.92409°, -164.91193°
Legal Description: K006S031W34
Region: Arctic
Road Name: Kougarok Road

Datum: NAD83
Quad Name / ITM: Solomon D-6
AWC Stream #:
Stream Name: Pilgrim River tributary

Elevation:

Site Comments: Mile 41.9

Survey Date: Sep 20, 2005

Survey SEW05-KR12

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:

Sediment accumulation
Culvert sagging in middle
Culvert gradient red
Constriction ratio gray
Mechanical damage or joints parting

Comments: None

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated steel)

Fish Passage Rating: Red

Length(ft): 73.6

Inlet Type: Mitered

Outlet Type: Mitered

Corrugation Depth(in.): 0.75

Corrugation Width(in.): 2.75

Condition Rating(1-5): 2

Approach Angle: 14.0

Sedimentation At Inlet:

Inlet Substrate: None

Outlet Substrate: Silt/Clay

	Inlet	Outlet
Width(ft):	4.1
Height(ft):	4.1
Apron Length(ft):
Water Depth(ft):		1.39
Rustline Height(ft):	0.9
Substrate Depth(ft):	0.0	3.4

Backwatered?: No

Baffles Present: No

Embedded?: No

Embedded Depth(ft): 0.0

Outfall Height: 0.0

Outfall Type:

Constriction Ratio: 0.66

Culvert Gradient: 5.11%

Max Slope:

Max Slope Length:

Comments: Outlet buried and 85% plugged; outlet depth calculated

Culvert Observations:

Sediment accumulation
Culvert sagging in middle
Culvert gradient red
Constriction ratio gray
Mechanical damage or joints parting

Stream Measurements

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

Stream Slope(deg.):
Stream Flow Stage:

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Downstream ordinary high water
Downstream ordinary high water	93.0	6.20
Upstream bank full	75.0	8.90
Upstream bank full	100.0	8.00
Upstream bank full	125.0	8.00
Upstream bank full	150.0	11.90
Upstream bed width	75.0	5.40
Upstream bed width	100.0	5.20
Upstream bed width	125.0	6.20
Upstream bed width	150.0	5.60
Upstream ordinary high water	75.0	6.50
Upstream ordinary high water	100.0	6.50
Upstream ordinary high water	125.0	6.40
Upstream ordinary high water	150.0	5.60

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
Max Pool Depth				1.50
Outlet Pool Water Elev				83.85
U/S Thalweg				86.70
D/S Grade Ctrl (Thalweg)		0.00	93.0	81.94
D/S Tailcrest or 1st Thalweg		87.00	6.0	83.45
OHW (Outlet Tailcrest)		87.00	6.0	83.80
D/S Thalweg		88.00	5.0	0.40
Outlet Invert	1	93.00	0.0	82.46
Road Elev		129.50		100.25
Inlet Culvert Invert	1	166.00	0.0	86.22
U/S Thalweg		174.00	8.0	86.61
U/S Grade Ctrl (Thalweg)		198.00	32.0	87.22

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.