Fish Passage Site 20103769

Coordinates (dec. deg.): 60.48426°, -145.43273°
Legal Description: C016S001W17
Region: South Central
Road Name: Sheridan Glacier Road

Datum: NAD83
Quad Name / ITM: Cordova B-4
AWC Stream #: 212-10-10020-2019-3005
Stream Name: Unnamed

Elevation:

Site Comments: Site is at the intersection of Sheridan Glacier Road and the Glacier Highway.

Survey Date: Oct 11, 2017

Survey CRWP17-Sher3

Observers: Kirsti Jurica, Hoots Witsoe

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red
  2. Shallow fill; inadequate roadfill volume above culvert
  3. Culvert is too short
  4. Mechanical damage or joints parting
  5. Structural Problem
  6. Road bank erosion

Comments: Culvert assessment performed and submitted by the Copper River Watershed Project. Site is just upstream from 20100469. Culverts severely damaged and too short for site. Numerous juvenile Coho salmon trapped upstream.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 30.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.):
Corrugation Width(in.):
Condition Rating(1-5): 1
Approach Angle:
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):1.6 1.5
Height(ft):0.71 1.19
Apron Length(ft):
Water Depth(ft): 0.37
Rustline Height(ft):
Substrate Depth(ft):
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.09
Culvert Gradient: -0.70%
Max Slope:
Max Slope Length:
 

Comments: Inlet and outlet have been crushed and partially buried from road fill being pushed into creek and road bank erosion.
  Culvert Observations:
  1. Constriction ratio red
  2. Mechanical damage or joints parting
  3. Structural Problem
  4. Road bank erosion
  5. Culvert is too short
  6. Road bank erosion
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 30.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.):
Corrugation Width(in.):
Condition Rating(1-5): 1
Approach Angle:
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):0.65 0.95
Height(ft):0.89 0.7
Apron Length(ft):
Water Depth(ft): 0.39
Rustline Height(ft):
Substrate Depth(ft):
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.09
Culvert Gradient: 0.66%
Max Slope:
Max Slope Length:
 

Comments: Culvert gradient using top of culvert elevations but culvert is damaged. Inlet and outlet have been crushed and partially buried with road fill.
  Culvert Observations:
  1. Constriction ratio red
  2. Structural Problem
  3. Mechanical damage or joints parting
  4. Road bank erosion
  5. Culvert is too short
  6. Shallow fill; inadequate roadfill volume above culvert

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:Silt/ClaySilt/Clay
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 14.6
Upstream ordinary high water 15.1
Upstream ordinary high water 16.8

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 100.00
D/S Thalweg (Top of DS site 20100469) 0.00 99.62
D/S Thalweg (Invert of DS site 20100469) 0.00 96.00
D/S Thalweg 6.00 94.87
D/S Water Surface Elev 6.00 98.16
D/S Thalweg (Sedimentation) 42.00 96.93
D/S Water Surface Elev 42.00 98.16
D/S Water Surface Elev 49.00 98.17
D/S Tailcrest or 1st Thalweg 49.00 97.94
Outlet Pool Water Elev 55.00 98.18
Max Pool Depth 55.00 97.19
Outlet Invert (on substrate) 1 59.00 97.81
Outlet Invert (on substrate) 2 59.00 97.89
D/S Water Surface Elev 2 59.00 98.28
D/S Water Surface Elev 1 59.00 98.18
Outlet Culvert Top (damaged) 2 59.00 98.59
Outlet Culvert Top (damaged) 1 59.00 99.00
Inlet Culvert Top (damaged) 2 89.00 98.61
Inlet Culvert Top (damaged) 1 89.00 98.79
Inlet Culvert Invert (on substrate) 1 89.00 98.08
U/S Water Surface Elev 1 89.00 98.23
U/S Water Surface Elev 2 89.00 98.28
Inlet Culvert Invert (on substrate) 2 89.00 97.72
U/S Thalweg 94.00 96.63
U/S Water Surface Elev 94.00 98.32
U/S Grade Ctrl (Thalweg) 115.00 95.87
U/S Water Surface Elev 115.00 98.32

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

Gear Type: Minnow Trap (A) Trap Duration(h): 18.0
 
Gear Type: Minnow Trap (B) Trap Duration(h): 18.0

Fish Observations

Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 16 Fish Measured: 2 Fork Lengths (mm) Min: 85 Max: 95 Mean: 90
Collected/Observed by Gear Type: Not Recorded Minnow Trap (12)  Not Recorded Minnow Trap (4)  
 
Species: stickleback-unspecified Life History: Unknown
Total Fish Observed: 9 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Not Recorded Minnow Trap (3)  Not Recorded Minnow Trap (6)  

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