Fish Passage Improvement site 20501500

Fish Passage Site 20501500

Coordinates (dec. deg.): 62.48606°, -150.76567°
Legal Description: S028N008W28
Region: South Central
Road Name: Petersville Road

Datum: WGS84
Quad Name / ITM: Talkeetna B-2
AWC Stream #:
Stream Name: Peters Creek 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 PRK09-PVR23

site photos

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

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:

Site Observations:

Outfall height gray
Constriction ratio gray
Shallow fill; inadequate roadfill volume above culvert

Comments: **Updated site photos and fish sampling information added from 9/8/16 site visit from Sampling Unmapped Streams in the MSB project.** Probably no OH w/ flows adequate for fish; CR very close to green; site prob not a barrier at flows adequate for fish.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated steel)

Fish Passage Rating: Gray

Length(ft): 39.6

Inlet Type: Projecting

Outlet Type: Projecting

Corrugation Depth(in.): 0.5

Corrugation Width(in.): 2.67

Condition Rating(1-5): 1

Approach Angle: 9.0

Sedimentation At Inlet: Yes

Inlet Substrate: Silt/Clay

Outlet Substrate: None

	Inlet	Outlet
Width(ft):	2.9	2.9
Height(ft):	2.4	3.0
Apron Length(ft):
Water Depth(ft):		0.0
Rustline Height(ft):	0.0
Substrate Depth(ft):	0.6	0.0

Backwatered?: No

Baffles Present: No

Embedded?: No

Outfall Height: 0.13

Outfall Type: Free Fall In To Pool

Constriction Ratio: 0.73

Culvert Gradient: -0.48%

Max Slope:

Max Slope Length:

Comments: Outfall height probably not an issue with adequate flow.

Culvert Observations:

Outfall height gray
Constriction ratio gray
Shallow fill; inadequate roadfill volume above culvert

Stream Measurements

Stream Substrates	Upstream	Downstream
Dominant:	Silt/Clay	Gravel
Subdominant:	Sand	Sand

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

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Upstream ordinary high water	36.0	4.00
Upstream ordinary high water	54.0	4.50
Upstream ordinary high water	72.0	3.50

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
Outlet Pool Water Elev	1			97.54
U/S Headwater	1			97.68
D/S Tailcrest or 1st Thalweg (no water but obvious stream chan)	1	0.00	6.0	97.63
D/S Thalweg (bottom of pool)	1	3.70	2.3	96.74
Outlet Invert	1	6.00	0.0	97.67
Road Elev	1	25.50		102.17
Inlet Culvert Invert (on substrate)	1	45.00	0.0	97.48

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.