Fish Passage Site 20502152

Coordinates (dec. deg.): 62.37938°, -150.26729°
Legal Description: S027N005W31
Region: South Central
Road Name: Parks Highway

Datum: NAD83
Quad Name / ITM: Talkeetna B-1
AWC Stream #:
Stream Name: Chulitna River tributary

Elevation:

Site Comments: Site is at approx MP 119.2.

Survey Date: Oct 27, 2011

Survey MSB11-PRK119

Project Supervisor: Gillian O'Doherty, Alaska Department of Fish and Game — Anchorage, AK
Observers: Gillian O'Doherty, Mark Eisenman

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Outfall height gray
  3. Beaver Activity
  4. Culvert sagging in middle
  5. Compound gradient in pipe

Comments: Culvert is badly damaged. Culvert is sagging in middle. Both the inlet and outlet are bent up. The inlet is severly bent and has seperated from the rest of the pipe creating a compound gradient in pipe. Max grad is probably well of 10%. The length of bent up pipe is 10 feet. Beaver dams above and below culvert create large elevation drops. Culvert is not blocked but there is a beaver dam about 25 feet upstream from inlet. Inlet and outlet are damaged and bent up. Inlet has separted and creates a 10 foot long compound gradient in pipe. Culvert is also sagging in middle. No traps set weather is too cold and no fish observed.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 99.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 1
Approach Angle: 20.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):4.8 4.9
Height(ft):5.2 5.0
Apron Length(ft):
Water Depth(ft): 0.11
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.21
Outfall Type: Free Fall In To Pool
Constriction Ratio:
Culvert Gradient: 2.80%
Max Slope:
Max Slope Length: 10.0
  Culvert Observations:
  1. Culvert gradient red
  2. Outfall height gray
  3. Beaver Activity
  4. Compound gradient in pipe
  5. Culvert sagging in middle

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:Silt/ClaySilt/Clay
Stream Slope(deg.):
Stream Flow Stage:Medium

No stream width data available.

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 98.95
D/S Water Surface Elev (tailwater surface. Tail water control is a series of beaver dams. Max pool >3 feet.) 0.00 82.58
Outlet Invert (bottom of pipe) 1.00 82.68
D/S Water Surface Elev 1.00 82.79
Outlet Culvert Top 1.00 87.77
Inlet Culvert Top 100.00 90.53
Inlet Culvert Invert (bottom of pipe.) 100.00 85.48
U/S Water Surface Elev 100.00 85.79

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