Fish Passage Improvement site 50101579

Fish Passage Site 50101579

Coordinates (dec. deg.): 64.45615°, -165.10107°
Legal Description: K012S032W08
Region: Arctic
Road Name: Council Road

Datum: NAD83
Quad Name / ITM: Nome B-1
AWC Stream #:
Stream Name: Hastings Creek

Elevation:

Site Comments: Mile 9.7. Tidal. 2 overflow pipes, on one either side of crossing.

Survey Date: Oct 13, 2005

Survey SEW05-COR24

site photos

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

Overall Fish Passage Rating: Gray

Tidal: Yes
Backwatered: Maybe

Step Pools: No
Construction Year:

Site Observations:

Constriction ratio gray
Outfall height gray

Comments: Creek is tidaully influenced at this location, outletl pool is very deep. u/s/ channel is low gradient, incised with sand substrate.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Structural steel plate)

Fish Passage Rating: Gray

Length(ft): 85.5

Inlet Type: Flush

Outlet Type: Flush

Corrugation Depth(in.): 2.0

Corrugation Width(in.): 6.0

Condition Rating(1-5): 3

Approach Angle: 15.0

Sedimentation At Inlet:

Inlet Substrate: None

Outlet Substrate: None

	Inlet	Outlet
Width(ft):	11.8
Height(ft):	12.0
Apron Length(ft):
Water Depth(ft):		0.7
Rustline Height(ft):	3.9
Substrate Depth(ft):	0.0	0.0

Backwatered?: Maybe

Baffles Present: No

Embedded?: No

Embedded Depth(ft): 0.0

Outfall Height: 0.25

Outfall Type:

Constriction Ratio: 0.65

Culvert Gradient: 0.19%

Max Slope:

Max Slope Length:

Comments: 2 x 36" overflow pipes not surveyed.

Culvert Observations:

Constriction ratio gray
Outfall height gray

Stream Measurements

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

Stream Slope(deg.):
Stream Flow Stage:

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Downstream ordinary high water
Downstream ordinary high water	198.0	84.00
Upstream bank full	75.0	31.10
Upstream bank full	100.0	20.80
Upstream bank full	125.0	22.40
Upstream bank full	150.0	25.50
Upstream bed width	75.0	19.50
Upstream bed width	100.0	13.20
Upstream bed width	125.0	15.80
Upstream bed width	150.0	17.50
Upstream ordinary high water	75.0	22.00
Upstream ordinary high water	100.0	16.50
Upstream ordinary high water	125.0	16.80
Upstream ordinary high water	150.0	17.80

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
Max Pool Depth				10.00
Outlet Pool Water Elev				89.43
D/S Thalweg		0.00	198.0	88.52
D/S Tailcrest or 1st Thalweg		71.00	127.0	88.84
OHW (Outlet Tailcrest)		71.00	127.0	89.59
D/S Thalweg		193.00	5.0	5.00
Outlet Invert	1	198.00	0.0	88.98
Road Elev		240.50		106.56
Inlet Culvert Invert	1	283.00	0.0	89.14
U/S Grade Ctrl (Thalweg)		301.00	18.0	89.88
U/S Thalweg		307.00	24.0	89.86
U/S Thalweg		358.00	75.0	87.60
U/S Thalweg		433.00	150.0	88.94

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.