Fish Passage Improvement site 50101592

Fish Passage Site 50101592

Coordinates (dec. deg.): 65.30891°, -164.72952°
Legal Description: K002S030W13
Region: Arctic
Road Name: Kougarok Road

Datum: NAD83
Quad Name / ITM: Bendeleben B-6
AWC Stream #:
Stream Name: Coffee Creek

Elevation:

Site Comments: Mile 75.7

Survey Date: Sep 17, 2005

Survey SEW05-KR04

site photos

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

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:

Site Observations:

Culvert gradient gray

Comments: Signs of active placer mining upstream.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated steel)

Fish Passage Rating: Gray

Length(ft): 111.3

Inlet Type: Mitered

Outlet Type: Mitered

Corrugation Depth(in.): 0.75

Corrugation Width(in.): 2.75

Condition Rating(1-5): 3

Approach Angle: 2.0

Sedimentation At Inlet:

Inlet Substrate: None

Outlet Substrate: None

	Inlet	Outlet
Width(ft):	5.9	5.9
Height(ft):	5.9	5.9
Apron Length(ft):
Water Depth(ft):		1.62
Rustline Height(ft):	2.5
Substrate Depth(ft):	0.0	0.0

Backwatered?: No

Baffles Present: No

Embedded?: No

Embedded Depth(ft): 0.0

Outfall Height: 0.0

Outfall Type: At Stream Grade

Constriction Ratio: 0.9

Culvert Gradient: 1.58%

Max Slope:

Max Slope Length:

Comments: Outlet pool too deep to wade; water depth outlet calculated

Culvert Observations:

Culvert gradient gray

Stream Measurements

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

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

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Downstream ordinary high water
Downstream ordinary high water	141.0	16.40
Upstream bank full	75.0	10.90
Upstream bank full	100.0	15.50
Upstream bank full	125.0	7.50
Upstream bank full	150.0	10.70
Upstream bed width
Upstream ordinary high water	75.0	5.20
Upstream ordinary high water	100.0	8.60
Upstream ordinary high water	125.0	4.80
Upstream ordinary high water	150.0	7.60

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
Outlet Pool Water Elev				83.77
U/S Thalweg				85.39
D/S Grade Ctrl (Thalweg)		0.00	141.0	79.73
D/S Tailcrest or 1st Thalweg		89.00	52.0	82.86
OHW (Outlet Tailcrest)		89.00	52.0	83.16
Bankfull		89.00	52.0	83.73
D/S Thalweg		136.00	5.0	6.00
Outlet Invert	1	141.00	0.0	82.15
Road Elev		196.50		102.06
Inlet Culvert Invert	1	252.00	0.0	83.91
U/S Thalweg		264.00	12.0	82.38
U/S Grade Ctrl (Thalweg)		327.00	75.0	83.26

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.