Fish Passage Improvement site 10103520

Fish Passage Site 10103520

Coordinates (dec. deg.): 55.69285°, -132.87784°
Legal Description: C071S082E20
Region: Southeast
Road Name: Big Salt Lake Road

Datum: WGS84
Quad Name / ITM: Craig C-3
AWC Stream #: 102-70-10580-2035-3013-4038
Stream Name: Unnamed

Elevation:

Site Comments: None

Survey Date: Jun 22, 2017

Survey SEA17-BSL03

site photos

Observers: Elizabeth Flory, Kelly Petty

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:

Site Observations:

Beaver Activity

Comments: 500ft upstream from Control Lake. Too braided upstream for width measurements. Beaver dam upstream contains cutthroat trout.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated steel)

Fish Passage Rating: Green

Length(ft): 98.0

Inlet Type: Mitered

Outlet Type: Mitered

Corrugation Depth(in.): 1.0

Corrugation Width(in.): 3.0

Condition Rating(1-5): 3

Approach Angle: 15.0

Sedimentation At Inlet: Yes

Inlet Substrate: Gravel

Outlet Substrate: Gravel

	Inlet	Outlet
Width(ft):	10.6	10.5
Height(ft):	6.9	6.5
Apron Length(ft):
Water Depth(ft):		0.35
Rustline Height(ft):	2.6
Substrate Depth(ft):	3.7	4.0

Backwatered?: No

Baffles Present: No

Embedded?: Yes

Embedded Depth(ft): 3.7

Outfall Height: 0.0

Outfall Type: At Stream Grade

Constriction Ratio: 1.12

Culvert Gradient: 0.30%

Max Slope:

Max Slope Length:

Comments: Cutthroat trout in beaver pond upstream. Common merganser with 12 ducklings at inlet. High rust line likely from beaver activity. Top of pipe length 80'.

Culvert Observations:

Beaver Activity

Stream Measurements

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

Stream Slope(deg.):	0.35
Stream Flow Stage:	Medium

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Downstream ordinary high water	20.0	8.33
Downstream ordinary high water	80.0	9.60
Downstream ordinary high water	120.0	10.33

Elevations

Locator ID	River Distance (ft)¹	Relative Elevation (ft)
Road Elev		110.00
D/S Water Surface Elev	0.00	92.75
D/S Grade Ctrl (Thalweg) (gravel)	0.00	92.44
OHW (Outlet Tailcrest) (gravel)	178.00	92.63
D/S Water Surface Elev	178.00	92.12
Max Pool Depth	191.00	92.15
D/S Water Surface Elev	191.00	93.20
D/S Water Surface Elev	197.00	93.53
Outlet Invert (On substrate, est. end of mitre)	197.00	93.18
Outlet Culvert Top	206.00	100.00
Inlet Culvert Top	286.00	100.24
U/S Water Surface Elev	295.00	94.16
Inlet Culvert Invert (On substrate, est. end of mitre)	295.00	93.07
U/S Grade Ctrl (Thalweg)	340.00	93.80
U/S Water Surface Elev	340.00	94.10

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

Gear Type: Minnow Trap (A)		Trap Duration(h): 1.5
Comments: 50 ft upstream

Gear Type: Minnow Trap (B)		Trap Duration(h): 1.5
Comments: 50ft downstream

Fish Observations

Species: juvenile coho salmon		Life History:
Total Fish Observed: 1	Fish Measured: 1	Fork Lengths (mm) Min: 40 Max: 40 Mean: 40
Collected/Observed by Gear Type: Downstream Minnow Trap (1)

Photos

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