Fish Passage Improvement site 10103523

Fish Passage Site 10103523

Coordinates (dec. deg.): 55.68408°, -132.87839°
Legal Description: C071S082E29
Region: Southeast
Road Name: Big Salt Lake Road

Datum: NAD83
Quad Name / ITM: Craig C-3
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: None

Survey Date: Jun 25, 2017

Survey SEA17-BSL06

site photos

Observers: Elizabeth Flory, Kelly Petty

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:

Site Observations:

Outfall height red
Culvert gradient red

Comments: Small trickle; too shallow fo minnow traps. Gets fairly steep upstream. Downstream has steep gradient to grassy marsh. Habitat marginal.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated steel)

Fish Passage Rating: Red

Length(ft): 66.0

Inlet Type: Mitered

Outlet Type: Mitered

Corrugation Depth(in.): 0.5

Corrugation Width(in.): 3.0

Condition Rating(1-5): 4

Approach Angle: 8.0

Sedimentation At Inlet: Yes

Inlet Substrate: Cobble

Outlet Substrate: None

	Inlet	Outlet
Width(ft):	2.5	2.5
Height(ft):	2.25	2.5
Apron Length(ft):
Water Depth(ft):		0.08
Rustline Height(ft):	0.33
Substrate Depth(ft):	0.25	0.0

Backwatered?: No

Baffles Present: No

Embedded?: No

Outfall Height: 1.56

Outfall Type: Free Fall In To Pool

Constriction Ratio: 1.37

Culvert Gradient: 2.20%

Max Slope:

Max Slope Length:

Comments: Top of culvert length 57.4.

Culvert Observations:

Outfall height red
Culvert gradient red

Stream Measurements

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

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

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Upstream ordinary high water	50.0	1.50
Upstream ordinary high water	80.0	2.20
Upstream ordinary high water	100.0	1.80

Elevations

Locator ID	River Distance (ft)¹	Relative Elevation (ft)
Road Elev		105.66
D/S Grade Ctrl (Thalweg)	0.00	85.63
D/S Water Surface Elev	0.00	85.69
D/S Grade Ctrl (Thalweg)	14.00	90.70
D/S Water Surface Elev	14.00	90.89
Max Pool Depth	30.00	95.31
D/S Water Surface Elev	30.00	95.86
Outlet Invert (On pipe)	31.40	97.34
D/S Water Surface Elev	31.40	97.42
Outlet Culvert Top	36.00	100.00
Inlet Culvert Top	93.40	101.27
Inlet Culvert Invert (On substrate)	97.40	98.95
U/S Water Surface Elev	97.40	99.12
U/S Grade Ctrl (Thalweg) (pool)	109.40	101.61
U/S Water Surface Elev	109.40	101.83
U/S Grade Ctrl (Thalweg)	132.40	106.13
U/S Water Surface Elev	132.40	106.32

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.