Fish Passage Site 20502150

Coordinates (dec. deg.): 62.35340°, -150.25304°
Legal Description: S026N005W08
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: This culvert is at approx. MP117.5.

Survey Date: Oct 27, 2011

Survey MSB11-PRK117

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. Outfall height red
  2. Constriction ratio gray
  3. Beaver Activity
  4. Inlet perch

Comments: There is a large beaver dam directly upstream from culvert inlets. Height is about 3.5 feet tall. Site is a Structure class 5 but all culverts rates as 2's. Site was very icyat time of survey so low flow. Very large and deep outlet pool. Large boulder rip rap set below outlets.

Culvert Measurements

ID: 1 Structure Type: Oval (Structural steel plate) Fish Passage Rating: Red
 
Length(ft): 83.0
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 3
Approach Angle:
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):6.6 6.5
Height(ft):7.3 7.4
Apron Length(ft):10.0 13.0
Water Depth(ft): 0.39
Rustline Height(ft):1.9
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.72
Outfall Type: Free Fall on To Rip Rap
Constriction Ratio: 0.73
Culvert Gradient: 0.82%
Max Slope:
Max Slope Length:
 

Comments: Apron Lengths are lengths of miter. Culvert lengths are taken from the tops of the miter. Total culvert length including mites is 106 feet. No approach angle beaver pond U/S.
  Culvert Observations:
  1. Outfall height red
  2. Constriction ratio gray
  3. Beaver Activity
  4. Inlet perch
ID: 2 Structure Type: Oval (Structural steel plate) Fish Passage Rating: Red
 
Length(ft): 83.0
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 3
Approach Angle:
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):6.6 6.5
Height(ft):7.3 7.4
Apron Length(ft):10.0 13.0
Water Depth(ft): 0.28
Rustline Height(ft):1.9
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.64
Outfall Type: Free Fall on To Rip Rap
Constriction Ratio: 0.73
Culvert Gradient: 1.07%
Max Slope:
Max Slope Length:
 

Comments: Apron Lengths are lengths of miter. Culvert lengths are taken from the tops of the miter. Total culvert length including miters is 106 feet.
  Culvert Observations:
  1. Outfall height red
  2. Constriction ratio gray
  3. Beaver Activity
  4. Inlet perch
  5. Culvert gradient gray
ID: 3 Structure Type: Oval (Structural steel plate) Fish Passage Rating: Red
 
Length(ft): 83.0
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 3
Approach Angle:
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):6.6 6.5
Height(ft):7.3 7.4
Apron Length(ft):10.0 13.0
Water Depth(ft): 0.37
Rustline Height(ft):1.9
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.73
Outfall Type: Free Fall on To Rip Rap
Constriction Ratio: 0.73
Culvert Gradient: 0.80%
Max Slope:
Max Slope Length:
 

Comments: Apron Lengths are lengths of miter. Culvert lengths are taken from the tops of the miter. Total culvert length including mites is 106 feet.
  Culvert Observations:
  1. Outfall height red
  2. Constriction ratio gray
  3. Beaver Activity
  4. Inlet perch

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicCobble
Subdominant:Sand/Silt/Clay (legacy)Gravel
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 16.00
Downstream ordinary high water 16.50
Downstream ordinary high water 14.30

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 97.69
D/S Water Surface Elev (tailwater surface) 0.00 83.70
Outlet Invert (on pipe, end of miter) 1 8.00 84.03
Outlet Invert (on pipe, end of miter) 3 8.00 84.06
Outlet Invert (on pipe, end of miter) 2 8.00 84.06
D/S Water Surface Elev 2 8.00 84.34
D/S Water Surface Elev 1 8.00 84.42
D/S Water Surface Elev 3 8.00 84.43
Outlet Culvert Top (top of miter) 2 21.00 91.44
Outlet Culvert Top (top of miter) 1 21.00 91.50
Outlet Culvert Top (top of miter) 3 21.00 91.59
Inlet Culvert Top (top of miter) 3 104.00 92.25
Inlet Culvert Top (top of miter) 1 104.00 92.27
Inlet Culvert Top (top of miter) 2 104.00 92.33
U/S Water Surface Elev (Water surface above beaver dam.) 114.00 87.86

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