Fish Passage Improvement site 20700785

Fish Passage Site 20700785

Coordinates (dec. deg.): 57.76874°, -152.52324°
Legal Description: S028S020W09
Region: Southwest
Road Name: Anton Larsen Bay Road

Datum: WGS84
Quad Name / ITM: Kodiak D-2
AWC Stream #:
Stream Name: Battery Creek Tributary

Elevation:

Site Comments: None

Multiple surveys have been conducted at this site — click on the drop down
arrow to the right of the survey date below to choose a different report for this site.

Survey UPD21-ALBO3

site photos

Project Supervisor: Kim Clark, ADFG — Anchorage, AK
Observers: Kim Clark, Michael Mazzacavallo

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year: 2021

Comments: Vegetation mat has lots of alders and willows. Steepened reach above inlet.

Culvert Measurements

ID: 1

Structure Type: Open-bottom arch (Structural aluminum plate)

Fish Passage Rating: Green

Length(ft): 40.8

Inlet Type: Headwall

Outlet Type: Headwall

Corrugation Depth(in.): 2.5

Corrugation Width(in.): 9.0

Condition Rating(1-5): 5

Approach Angle: 20.0

Sedimentation At Inlet: No

Inlet Substrate: Gravel

Outlet Substrate: Gravel

	Inlet	Outlet
Width(ft):	16.9	16.8
Height(ft):	5.67	5.55
Apron Length(ft):
Water Depth(ft):		0.72
Rustline Height(ft):
Substrate Depth(ft):

Backwatered?: No

Baffles Present: No

Embedded?: Yes

Outfall Height: 0.0

Outfall Type: At Stream Grade

Constriction Ratio: 1.75

Culvert Gradient: 1.60%

Max Slope:

Max Slope Length:

Comments: Culvert is a bottomless arch. Measured culvert gradient- Top: 1.6%; Invert 1.3%, Water surface 0.78% Culvert dimensions per desgins: 15'4" X 6'5"

Stream Measurements

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

Stream Slope(deg.):	1.9
Stream Flow Stage:	Low

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Upstream ordinary high water	30.0	9.50
Upstream ordinary high water	40.0	12.30
Upstream ordinary high water	65.0	9.80
Upstream ordinary high water	95.0	7.10

Elevations

Locator ID	River Distance (ft)¹	Relative Elevation (ft)
D/S Thalweg (bottom of riffle and reconstructed bank)	0.00	91.67
D/S Water Surface Elev	0.00	92.44
D/S Thalweg	27.00	92.41
D/S Water Surface Elev	27.00	93.00
D/S Water Surface Elev	54.00	93.74
D/S Thalweg (top of first riffle downstream of outlet)	54.00	92.93
D/S Water Surface Elev	86.00	93.83
D/S Thalweg (max depth of lateral scour pool along root wads)	86.00	92.78
Outlet Invert	90.00	93.11
D/S Water Surface Elev	90.00	93.83
Outlet Culvert Top	90.00	98.60
Inlet Culvert Top	130.80	99.25
U/S Water Surface Elev	130.80	94.15
Inlet Culvert Invert	130.80	93.63
U/S Thalweg (bottom of riffle)	135.80	93.78
U/S Water Surface Elev	135.80	94.50
U/S Thalweg (top of riffle)	146.80	94.36
U/S Water Surface Elev	146.80	94.97
U/S Water Surface Elev	155.80	95.05
U/S Thalweg (max pool depth)	155.80	93.91
U/S Thalweg	165.80	94.75
U/S Water Surface Elev	165.80	95.01

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.