Fish Passage Site 20501481

Coordinates (dec. deg.): 62.31047°, -150.36227°
Legal Description: S026N006W27
Region: South Central
Road Name: Petersville Road

Datum: WGS84
Quad Name / ITM: Talkeetna B-1
AWC Stream #:
Stream Name: Ninemile 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 MSB23-MS077

Project Supervisor: Michael Mazzacavallo, Alaska Department of Fish and Game — Anchorage, AK
Observers: Michael Mazzacavallo, Kat Leavitt, Beth Evers

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio gray
  2. Culvert gradient red

Comments: There is a large tree on top of the inlet culvert.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated aluminum) Fish Passage Rating: Red
 
Length(ft): 66.84
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 5
Approach Angle: 5.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):2.94 2.97
Height(ft):3.05 2.77
Apron Length(ft):
Water Depth(ft):0.0 0.32
Rustline Height(ft):0.0
Substrate Depth(ft):0.0 0.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.68
Culvert Gradient:
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio gray
  2. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:GravelGravel
Stream Slope(deg.):0.84
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream bed width 22.0 2.70
Upstream bed width 38.0 5.80
Upstream bed width 53.0 3.90
Upstream bed width 73.0 4.90

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
U/S Water Surface Elev 0.00 89.13
D/S Thalweg 0.00 89.22
U/S Water Surface Elev 30.00 89.72
D/S Thalweg 30.00 88.85
D/S Thalweg 88.00 89.85
U/S Water Surface Elev 88.00 90.10
U/S Water Surface Elev 99.00 90.13
Outlet Invert 99.00 89.81
Top of Pipe Outlet 99.00 92.95
Inlet Culvert Top 165.84 93.68
Inlet Culvert Invert 165.84 90.65
U/S Water Surface Elev 165.84 90.79
U/S Water Surface Elev 211.84 90.90
U/S Thalweg 211.84 89.67

Notes:

  1. River distance is measured continuously throughout the survey reach along the thalweg of the stream.
  2. Measured from each end of the crossing along the thalweg of the stream.

Fish Sampling Efforts

No fish sampling occurred during this survey.

Fish Observations

No fish observations occurred during this survey.

Questions or comments about this report can be directed to dfg.dsf.webmaster@alaska.gov