Fish Passage Improvement site 50101646

Fish Passage Site 50101646

Coordinates (dec. deg.): 64.63697°, -165.71572°
Legal Description: K010S035W08
Region: Arctic
Road Name: Teller Road

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

Elevation:

Site Comments: Mile 16.4. Tributary comes in to Arctic Creek just upstream of x-ing. Steep bank d/s of x-ing on river left.

Survey Date: Oct 03, 2005

Survey SEW05-TR07

site photos

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

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: Yes
Construction Year:

Site Observations:

Culvert gradient gray

Comments: USGS gaging station at site.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Structural steel plate)

Fish Passage Rating: Gray

Length(ft): 188.1

Inlet Type: Mitered

Outlet Type: Mitered

Corrugation Depth(in.): 2.0

Corrugation Width(in.): 6.0

Condition Rating(1-5): 4

Approach Angle: 1.0

Sedimentation At Inlet:

Inlet Substrate: Boulder

Outlet Substrate: Cobble

	Inlet	Outlet
Width(ft):	9.9
Height(ft):	9.6
Apron Length(ft):
Water Depth(ft):		0.8
Rustline Height(ft):	0.8
Substrate Depth(ft):	0.3	0.3

Backwatered?: No

Baffles Present: No

Embedded?: No

Embedded Depth(ft): 0.0

Outfall Height:

Outfall Type: Fish Passage Structue

Constriction Ratio: 0.95

Culvert Gradient: 1.79%

Max Slope:

Max Slope Length:

Comments: See notes; boulders blocking inlet = TC for u/s pool; riprap step pool at outlet; outfall height not measured.

Culvert Observations:

Culvert gradient gray

Stream Measurements

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

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	119.0	15.90
Upstream bank full	75.0	17.40
Upstream bank full	100.0	15.30
Upstream bank full	125.0	18.40
Upstream bank full	150.0	18.50
Upstream bed width	75.0	8.10
Upstream bed width	100.0	8.00
Upstream bed width	125.0	9.50
Upstream bed width	150.0	6.50
Upstream ordinary high water	75.0	12.10
Upstream ordinary high water	100.0	9.70
Upstream ordinary high water	125.0	10.70
Upstream ordinary high water	150.0	9.30

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
Max Pool Depth				2.10
U/S Thalweg				65.91
D/S Grade Ctrl (Thalweg)		0.00	119.0	55.54
D/S Thalweg		89.00	30.0	59.33
D/S Tailcrest or 1st Thalweg		89.00	30.0	59.33
OHW (Outlet Tailcrest)		89.00	30.0	60.58
D/S Grade Ctrl (Thalweg)		106.00	13.0	60.17
D/S Thalweg		114.00	5.0	1.80
Outlet Invert	1	119.00	0.0	61.44
Road Elev		213.00		93.06
Inlet Culvert Invert	1	307.00	0.0	64.81
U/S Grade Ctrl (Thalweg)		312.00	5.0	65.25
U/S Thalweg		325.00	18.0	64.90
U/S Thalweg		382.00	75.0	65.78
U/S Thalweg		457.00	150.0	67.81

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.