Fish Passage Improvement site 50101644

Fish Passage Site 50101644

Coordinates (dec. deg.): 64.71332°, -165.82210°
Legal Description: K009S036W14
Region: Arctic
Road Name: Teller Road

Datum: NAD83
Quad Name / ITM: Nome C-2
AWC Stream #:
Stream Name: Washington Creek

Elevation:

Site Comments: Mile 22.9

Survey Date: Oct 02, 2005

Survey SEW05-TR05

site photos

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:

Site Observations:

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

Comments: Sculpin observed u/s.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Structural steel plate)

Fish Passage Rating: Red

Length(ft): 93.9

Inlet Type: Mitered

Outlet Type: Flush

Corrugation Depth(in.): 2.0

Corrugation Width(in.): 6.0

Condition Rating(1-5): 4

Approach Angle: 31.0

Sedimentation At Inlet:

Inlet Substrate: None

Outlet Substrate: None

	Inlet	Outlet
Width(ft):	8.0
Height(ft):	8.1
Apron Length(ft):
Water Depth(ft):		0.6
Rustline Height(ft):	1.0
Substrate Depth(ft):	0.0	0.0

Backwatered?: No

Baffles Present: No

Embedded?: No

Embedded Depth(ft): 0.0

Outfall Height: 0.06

Outfall Type: Smooth Flow Over Apron

Constriction Ratio: 0.49

Culvert Gradient: 3.75%

Max Slope:

Max Slope Length:

Comments: sculpin obs u/s of inlet; boulders blocking inlet, outlet drops steeply over last 3' or so: see photos;

Culvert Observations:

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

Stream Measurements

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

Stream Slope(deg.):
Stream Flow Stage:

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Downstream ordinary high water
Downstream ordinary high water	110.0	11.40
Upstream bank full	75.0	33.40
Upstream bank full	100.0	31.90
Upstream bank full	125.0	37.10
Upstream bank full	150.0	37.50
Upstream bed width	75.0	17.10
Upstream bed width	100.0	13.80
Upstream bed width	125.0	12.70
Upstream bed width	150.0	10.70
Upstream ordinary high water	75.0	21.20
Upstream ordinary high water	100.0	17.70
Upstream ordinary high water	125.0	13.60
Upstream ordinary high water	150.0	13.20

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
Max Pool Depth				5.00
Outlet Pool Water Elev				74.72
D/S Grade Ctrl (Thalweg)		0.00	100.0	72.78
D/S Tailcrest or 1st Thalweg		71.00	29.0	73.75
OHW (Outlet Tailcrest)		71.00	29.0	74.69
D/S Thalweg		95.00	5.0	4.30
Outlet Invert	1	100.00	0.0	74.18
Road Elev		146.50		96.99
Inlet Culvert Invert	1	193.00	0.0	77.70
U/S Thalweg		209.00	16.0	78.75
U/S Grade Ctrl (Thalweg)		246.00	53.0	81.06
U/S Thalweg		268.00	75.0	80.91
U/S Thalweg		343.00	150.0	82.26

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.