Fish Passage Improvement site 20501396

Fish Passage Site 20501396

Coordinates (dec. deg.): 62.31191°, -150.39220°
Legal Description: S026N006W28
Region: South Central
Road Name: Petersville Road

Datum: NAD83
Quad Name / ITM: Talkeetna B-1
AWC Stream #: 247-41-10200-2081-3100-4136-5013
Stream Name: Ninemile Creek tributary

Elevation:

Site Comments: SUSITNA RIVER WATERSHED

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 PRK09-PVR07

site photos

Project Supervisor: Gillian O'Doherty, ADFG
Observers: Heidi Zimmer, Ben Histand

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:

Site Observations:

Outfall height red
Culvert gradient gray
Compound gradient in pipe
Mechanical damage or joints parting

Comments: Resurvey of PRK04IA033; compound grade from large cobble 1/3 of way from inlet; max grade is inlet miter. Evidence of old beaver activity downstream. **Updated site photos added from 9/9/16 site visit from Sampling Unmapped Streams in the MSB project. Fish sampling information entered into AFFI.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Structural steel plate)

Fish Passage Rating: Red

Length(ft): 84.2

Inlet Type: Mitered

Outlet Type: Mitered

Corrugation Depth(in.): 0.5

Corrugation Width(in.): 2.67

Condition Rating(1-5): 3

Approach Angle: 10.0

Sedimentation At Inlet: Yes

Inlet Substrate: None

Outlet Substrate: None

	Inlet	Outlet
Width(ft):	4.9	4.9
Height(ft):	4.9	5.0
Apron Length(ft):
Water Depth(ft):		0.09
Rustline Height(ft):	2.5
Substrate Depth(ft):	0.0	0.0

Backwatered?: No

Baffles Present: No

Embedded?: No

Outfall Height: 0.43

Outfall Type: Free Fall In To Pool

Constriction Ratio: 0.86

Culvert Gradient: 0.57%

Max Slope: 3.4

Max Slope Length:

Culvert Observations:

Outfall height red
Culvert gradient gray
Compound gradient in pipe
Mechanical damage or joints parting

Stream Measurements

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

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

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Upstream ordinary high water	112.0	6.00
Upstream ordinary high water	150.0	7.00
Upstream ordinary high water	200.0	4.00

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
Outlet Pool Water Elev	1			90.27
U/S Headwater	1			91.53
D/S Grade Ctrl (Thalweg)	1	0.00	48.0	89.34
D/S Water Surface Elev (ws at gp)	1	0.00	48.0	89.62
D/S Tailcrest or 1st Thalweg	1	38.00	10.0	90.06
D/S Water Surface Elev (ws at twc)	1	38.00	10.0	90.28
D/S Thalweg (bottom of pool)	1	44.50	3.5	89.27
D/S Water Surface Elev (ws at gp)	1	45.00	3.0	91.55
D/S Thalweg (stream bed at end of pipe)	1	48.00	0.0	90.05
Outlet Invert (end of pipe)	1	48.00	0.0	90.61
D/S Thalweg (invert at top of miter at outlet)	1	54.00	-6.0	90.50
Road Elev	1	90.00		100.69
U/S Thalweg (invert at top of miter at inlet)	1	127.00	-5.0	90.92
Inlet Culvert Invert (end of pipe)	1	132.00	0.0	91.09
U/S Grade Ctrl (Thalweg)	1	135.00	3.0	91.31

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.