Fish Passage Improvement site 20501391

Fish Passage Site 20501391

Coordinates (dec. deg.): 62.60844°, -150.22281°
Legal Description: S029N005W16
Region: South Central
Road Name: Parks Highway

Datum: NAD83
Quad Name / ITM: Talkeetna C-1
AWC Stream #:
Stream Name: Chulitna River 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 MSB11-PRK14

site photos

Project Supervisor: Gillian O'Doherty, Alaska Department of Fish and Game — Anchorage, AK
Observers: Abraham Gioffre, Jim Latham

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:

Site Observations:

Outfall height red
Culvert gradient red

Comments: Resurvey of a site with limited information. **Updated site photos added from 9/22/16 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): 131.0

Inlet Type: Mitered

Outlet Type: Mitered

Corrugation Depth(in.): 2.0

Corrugation Width(in.): 6.0

Condition Rating(1-5): 1

Approach Angle: 32.0

Sedimentation At Inlet: Yes

Inlet Substrate: None

Outlet Substrate: None

	Inlet	Outlet
Width(ft):	5.9	5.9
Height(ft):	6.0	6.4
Apron Length(ft):	0.0	0.0
Water Depth(ft):		0.4
Rustline Height(ft):	2.1
Substrate Depth(ft):	0.0	0.0

Backwatered?: No

Baffles Present: No

Embedded?: No

Outfall Height: 8.04

Outfall Type: Free Fall In To Pool

Constriction Ratio:

Culvert Gradient: 2.20%

Max Slope:

Max Slope Length:

Comments: Length of each miter is 8' and length of pipe is the total to the end.

Culvert Observations:

Outfall height red
Culvert gradient red

Stream Measurements

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

Stream Slope(deg.):	2.5
Stream Flow Stage:	Medium

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Upstream ordinary high water	53.0	7.10
Upstream ordinary high water	92.0	7.60
Upstream ordinary high water	134.0	7.30

Elevations

Locator ID	River Distance (ft)¹	Relative Elevation (ft)
D/S Water Surface Elev	0.00	67.88
D/S Grade Ctrl (Thalweg) (GP)	0.00	67.54
D/S Grade Ctrl (Thalweg) (GP)	20.00	68.41
D/S Water Surface Elev	20.00	68.68
D/S Tailcrest or 1st Thalweg (tailwater control)	34.00	69.06
D/S Water Surface Elev	34.00	69.28
Max Pool Depth (max pool)	42.00	67.72
D/S Water Surface Elev (pool surface below end of pipe)	43.00	69.22
Misc. (top of footer support)	48.00	73.17
D/S Thalweg (bottom of pipe at end of miter)	48.00	76.23
D/S Water Surface Elev (water surface at end of pipe)	48.00	76.56
Outlet Invert (invert on pipe)	56.00	76.86
D/S Water Surface Elev (outlet water surface)	56.00	77.26
Outlet Culvert Top	56.00	83.01
Road Elev	118.00	100.00
Inlet Culvert Top	171.00	85.52
Inlet Culvert Invert (on pipe)	171.00	79.40
U/S Water Surface Elev (inlet water surface)	171.00	79.93
U/S Water Surface Elev	179.00	80.06
U/S Thalweg (bottom of pipe at end of miter)	179.00	79.58
U/S Grade Ctrl (Thalweg) (GP at riffle near ATV fiord)	192.00	81.00
U/S Water Surface Elev	192.00	81.27
U/S Water Surface Elev (water surface for stream grad)	197.00	81.32
U/S Water Surface Elev	232.00	82.82
U/S Water Surface Elev (water surface for stream grad)	332.00	84.69

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.