Fish Passage Improvement site 50101580

Fish Passage Site 50101580

Coordinates (dec. deg.): 64.46511°, -165.14898°
Legal Description: K012S032W07
Region: Arctic
Road Name: Council Road

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

Elevation:

Site Comments: Mile 8.1

Survey Date: Oct 13, 2005

Survey SEW05-COR25

site photos

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

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:

Site Observations:

Mechanical damage or joints parting
Sediment accumulation

Comments: None

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated steel)

Fish Passage Rating: Green

Length(ft): 62.7

Inlet Type: Mitered

Outlet Type: Mitered

Corrugation Depth(in.): 1.0

Corrugation Width(in.): 3.0

Condition Rating(1-5): 2

Approach Angle: 8.0

Sedimentation At Inlet:

Inlet Substrate: Gravel

Outlet Substrate: Gravel

	Inlet	Outlet
Width(ft):	4.0
Height(ft):	5.1
Apron Length(ft):
Water Depth(ft):		0.8
Rustline Height(ft):	2.0
Substrate Depth(ft):	0.6	0.2

Backwatered?: No

Baffles Present: No

Embedded?: No

Embedded Depth(ft): 0.0

Outfall Height: 0.03

Outfall Type:

Constriction Ratio: 1.01

Culvert Gradient: 0.33%

Max Slope:

Max Slope Length:

Comments: sediment accumulation inside pipe created pool TC at 32' inside pipe, backwatered to inlet from that point.

Culvert Observations:

Mechanical damage or joints parting
Sediment accumulation

Stream Measurements

Stream Substrates	Upstream	Downstream
Dominant:	Sand	Gravel
Subdominant:	Cobble	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	60.0	6.20
Upstream bank full	75.0	8.00
Upstream bank full	100.0	7.70
Upstream bank full	125.0	7.00
Upstream bank full	150.0	6.00
Upstream bed width	75.0	4.60
Upstream bed width	100.0	2.80
Upstream bed width	125.0	3.00
Upstream bed width	150.0	2.80
Upstream ordinary high water	75.0	6.40
Upstream ordinary high water	100.0	3.00
Upstream ordinary high water	125.0	3.20
Upstream ordinary high water	150.0	3.20

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
Max Pool Depth				1.00
Outlet Pool Water Elev				92.23
U/S Thalweg				92.31
D/S Grade Ctrl (Thalweg)		0.00	60.0	90.64
D/S Grade Ctrl (Thalweg)		21.00	39.0	91.52
D/S Tailcrest or 1st Thalweg		42.50	17.5	91.89
OHW (Outlet Tailcrest)		42.50	17.5	92.18
D/S Thalweg		55.00	5.0	0.80
Outlet Invert	1	60.00	0.0	91.46
Road Elev		91.00		102.25
Inlet Culvert Invert	1	122.00	0.0	91.67
U/S Thalweg		130.00	8.0	91.44
U/S Thalweg		197.00	75.0	92.21
U/S Grade Ctrl (Thalweg)		217.00	95.0	92.66
U/S Grade Ctrl (Thalweg)		272.00	150.0	93.35

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.

Fish Sampling Efforts

No fish sampling occurred during this survey.

Fish Observations

No fish observations occurred during this survey.

Photos

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