Fish Passage Improvement site 20303755

Fish Passage Site 20303755

Coordinates (dec. deg.): 60.54758°, -150.73615°
Legal Description: S005N008W06
Region: South Central
Road Name: Otter Trail Road

Datum: NAD83
Quad Name / ITM: Kenai C-2
AWC Stream #: 244-30-10010-2063-3004
Stream Name: Unnamed

Elevation:

Site Comments: Anadromy ends at culvert crossing

Survey Date: May 31, 2017

Survey KEN17-OTR01

site photos

Observers: Maggie Schaffer, Elise Idle

Overall Fish Passage Rating: Black

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:

Comments: Assessment information collected and submitted by USFWS. Unable to take upstream measurements due to large bog. Downstream heavily overgrown with grass, has multiple meandering channels. Water is heavily silted. Pipes have damage in the middle. Local residents mentioned that there are normally mallard ducks out on the pond, but there haven't been any this year. Long Profile elevations inconsistent. Site could be backwatered from photos, but elevations do not show that. Top of pipe gradient is adverse. Site rated black.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated steel)

Fish Passage Rating: Red

Length(ft): 35.0

Inlet Type: Projecting

Outlet Type: Projecting

Corrugation Depth(in.): 0.5

Corrugation Width(in.): 3.0

Condition Rating(1-5): 4

Approach Angle:

Sedimentation At Inlet: No

Inlet Substrate: Silt/Clay

Outlet Substrate: Silt/Clay

	Inlet	Outlet
Width(ft):	2.5	2.5
Height(ft):	2.19	2.15
Apron Length(ft):
Water Depth(ft):		0.55
Rustline Height(ft):
Substrate Depth(ft):	0.35	0.35

Backwatered?: Yes

Baffles Present: No

Embedded?: No

Outfall Height:

Outfall Type: At Stream Grade

Constriction Ratio: 1.37

Culvert Gradient:

Max Slope:

Max Slope Length:

Comments: Damage inside middle of pipe.

Stream Measurements

Stream Substrates	Upstream	Downstream
Dominant:	Silt/Clay	Silt/Clay
Subdominant:	Organic	Organic

Stream Slope(deg.):
Stream Flow Stage:	Wet, No Defined Channel

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Downstream ordinary high water	19.0	1.20
Downstream ordinary high water	41.0	2.40
Downstream ordinary high water	60.0	1.90

Elevations

Locator ID	River Distance (ft)¹	Relative Elevation (ft)
Road Elev		98.28
D/S Water Surface Elev	0.00	9.13
D/S Thalweg (Elevations may be erroneous)	0.00	91.57
D/S Thalweg	18.00	9.84
D/S Water Surface Elev	18.00	92.42
D/S Water Surface Elev	34.00	92.88
D/S Thalweg	34.00	92.38
D/S Thalweg	54.00	93.87
D/S Water Surface Elev	54.00	94.23
D/S Water Surface Elev	60.00	94.33
Outlet Invert	60.00	93.78
Outlet Culvert Top	60.00	95.97
Inlet Culvert Invert	95.00	94.70
U/S Water Surface Elev	95.00	94.77
Inlet Culvert Top	95.00	95.78

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.