Fish Passage Site 20501467

Coordinates (dec. deg.): 62.14681°, -149.91304°
Legal Description: S024N004W25
Region: South Central
Road Name: Makuskin Road

Datum: WGS84
Quad Name / ITM: Talkeetna Mts A-6
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: Site has been replaced since 2009 survey.

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-MAK01

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Constriction ratio gray
  3. Other, including vibrations, cavitation, etc.

Comments: OT = road washed out, water traveling over road about 20 feet from culvert; CR not considered red b/c of flow diverted over road.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 19.9
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 3
Approach Angle: 38.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):2.0 2.0
Height(ft):1.9 2.0
Apron Length(ft):
Water Depth(ft): 0.27
Rustline Height(ft):0.5
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.31
Culvert Gradient: 2.16%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Constriction ratio gray
  3. Other, including vibrations, cavitation, etc.

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleSand
Subdominant:BoulderGravel
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 68.0 7.50
Upstream ordinary high water 83.0 6.50
Upstream ordinary high water 112.0 5.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
(t-weg u/s edge washout) 99.22
U/S Headwater 1 99.38
Outlet Pool Water Elev 1 98.62
D/S Water Surface Elev (ws at u/s pro) 1 0.00 50.0 99.40
D/S Grade Ctrl (Thalweg) 1 0.00 50.0 96.37
D/S Water Surface Elev (ws at GP) 1 0.00 50.0 96.70
D/S Water Surface Elev (ws at TWC) 1 16.00 34.0 97.44
D/S Tailcrest or 1st Thalweg 1 16.00 34.0 96.60
D/S Thalweg (bottom of outlet pool) 1 17.00 33.0 96.57
D/S Thalweg (toe of riffle) 1 27.00 23.0 97.39
D/S Thalweg 1 36.50 13.5 97.69
D/S Thalweg 1 45.40 4.6 98.08
D/S Thalweg 1 48.80 1.2 98.23
Outlet Invert 1 50.00 0.0 98.35
Road Elev 1 59.50 101.59
Inlet Culvert Invert 1 69.00 0.0 98.78
U/S Thalweg (end of rocks at inlet/mud in u/s pool) 1 71.50 2.5 98.33
U/S Thalweg (toe of riffle/top of pool) 1 119.00 50.0 98.23

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