Fish Passage Site 20504064

Coordinates (dec. deg.): 62.18749°, -150.48818°
Legal Description: S024N007W12
Region: South Central
Road Name: S Sister Road

Datum:
Quad Name / ITM: Talkeetna A-1
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: None

Survey Date: Oct 05, 2023

Survey MSB23-MS086

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

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Beaver Activity
  2. Woody Debris
  3. Culvert sagging in middle

Comments: Juvenile fish sighted upstream.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Unknown) Fish Passage Rating: Green
 
Length(ft): 24.95
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.75
Corrugation Width(in.): 8.0
Condition Rating(1-5): 4
Approach Angle: 5.0
Sedimentation At Inlet: No
Inlet Substrate: Organic
Outlet Substrate: Sand
InletOutlet
Width(ft):4.8 4.48
Height(ft):4.18 4.55
Apron Length(ft):
Water Depth(ft):0.0 0.54
Rustline Height(ft):
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:
Culvert Gradient: -0.04%
Max Slope:
Max Slope Length:
 

Comments: Metal with coating on it, cannot see rustline. Irregular corregations. We used water surface to calculate all culvert gradients due to warp in pipe. Pipe gradient negative for culvert #1 & #2.
  Culvert Observations:
  1. Beaver Activity
  2. Woody Debris
  3. Culvert sagging in middle
ID: 2 Structure Type: Circular pipe (Unknown) Fish Passage Rating: Green
 
Length(ft): 27.28
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.75
Corrugation Width(in.): 8.0
Condition Rating(1-5): 3
Approach Angle: 5.0
Sedimentation At Inlet: No
Inlet Substrate: Organic
Outlet Substrate: Sand
InletOutlet
Width(ft):4.45 4.38
Height(ft):4.15 4.46
Apron Length(ft):
Water Depth(ft):0.0 1.58
Rustline Height(ft):
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:
Culvert Gradient: -0.04%
Max Slope:
Max Slope Length:
 

Comments: Top severely sagging for culvert #2.Metal with coating on it, cannot see rustline. Irregular corregations.
  Culvert Observations:
  1. Beaver Activity
  2. Woody Debris
  3. Culvert sagging in middle
ID: 3 Structure Type: Circular pipe (Unknown) Fish Passage Rating: Green
 
Length(ft): 23.84
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.75
Corrugation Width(in.): 8.0
Condition Rating(1-5): 3
Approach Angle: 5.0
Sedimentation At Inlet: No
Inlet Substrate: Organic
Outlet Substrate: Sand
InletOutlet
Width(ft):4.15 4.4
Height(ft):4.76 4.35
Apron Length(ft):
Water Depth(ft):0.0 2.1
Rustline Height(ft):
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:
Culvert Gradient: 0.13%
Max Slope:
Max Slope Length:
 

Comments: Culvert #3 the top is sagging.Metal with coating on it, cannot see rustline. Irregular corregations.
  Culvert Observations:
  1. Beaver Activity
  2. Woody Debris
  3. Culvert sagging in middle

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:SandSand
Subdominant:OrganicOrganic
Stream Slope(deg.):0.08
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 60.0 10.50
Downstream ordinary high water 75.0 18.00
Downstream ordinary high water 110.0 13.40

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 99.83
U/S Water Surface Elev 0.00 94.72
U/S Water Surface Elev 1 20.00 94.71
U/S Water Surface Elev 3 20.00 94.71
Inlet Culvert Top 2 20.00 96.88
Inlet Culvert Top 1 20.00 97.32
Inlet Culvert Invert 2 20.00 92.65
Inlet Culvert Invert 1 20.00 92.88
Inlet Culvert Invert 3 20.00 93.22
U/S Water Surface Elev 2 20.00 94.62
Inlet Culvert Top 3 20.00 97.94
Outlet Invert 3 43.84 92.58
D/S Water Surface Elev 3 43.84 94.68
Outlet Culvert Top 3 43.84 96.92
Outlet Invert 1 44.95 94.18
Outlet Culvert Top 1 44.95 98.63
D/S Water Surface Elev 1 44.95 94.72
Outlet Invert 2 47.28 93.14
Outlet Culvert Top 2 47.28 97.55
D/S Water Surface Elev 2 47.28 94.72
D/S Water Surface Elev 77.28 94.66

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