Fish Passage Site 20103764

Coordinates (dec. deg.): 61.97768°, -145.33852°
Legal Description: C002N001W01
Region: South Central
Road Name: Hector Ewan Road

Datum: NAD83
Quad Name / ITM: Valdez D-4
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: Tributary to Yetna Creek (AWC #212-20-10080-2405)

Survey Date: Sep 19, 2016

Survey CRWP17-Hec4

Observers: Kirsti Jurica, Hoots Witsoe

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Outfall height red
  2. Culvert gradient gray
  3. Constriction ratio gray
  4. Beaver Activity
  5. Culvert is poorly aligned
  6. Hydraulic flows exceeded capacity

Comments: Thick brush. Sprawling wetland downstream of crossing.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 48.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 3
Approach Angle: 40.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: Cobble
InletOutlet
Width(ft):2.4 2.5
Height(ft):2.46 2.18
Apron Length(ft):
Water Depth(ft): 0.28
Rustline Height(ft):0.8
Substrate Depth(ft):0.0 0.5
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.72
Outfall Type: Cascade Over Rip-Rap
Constriction Ratio: 0.51
Culvert Gradient: 2.10%
Max Slope:
Max Slope Length:
 

Comments: Gradient taken from Top of pipe elevations.
  Culvert Observations:
  1. Culvert gradient red
  2. Outfall height red
  3. Beaver Activity
  4. Constriction ratio gray
  5. Culvert is poorly aligned
  6. Hydraulic flows exceeded capacity
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 46.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 3
Approach Angle: 40.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):2.1 2.0
Height(ft):2.02 1.95
Apron Length(ft):
Water Depth(ft): 0.08
Rustline Height(ft):0.92
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.95
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.51
Culvert Gradient: 0.90%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient gray
  2. Outfall height red
  3. Constriction ratio gray
  4. Beaver Activity
  5. Hydraulic flows exceeded capacity
  6. Culvert is poorly aligned

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClayCobble
Subdominant:OrganicOrganic
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 8.80
Downstream ordinary high water 4.80
Downstream ordinary high water 5.20

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 100.00
D/S Water Surface Elev 0.00 94.46
D/S Grade Ctrl (Thalweg) 0.00 93.80
D/S Tailcrest or 1st Thalweg 16.00 93.88
D/S Water Surface Elev 16.00 94.58
Outlet Pool Water Elev 23.00 94.60
Max Pool Depth 23.00 94.00
Outlet Invert (on substrate) 1 45.00 95.04
D/S Water Surface Elev 1 45.00 95.32
Outlet Culvert Top 1 45.00 97.22
D/S Water Surface Elev 2 46.00 95.20
D/S Grade Ctrl (Thalweg) 2 46.00 94.82
Outlet Invert (on pipe) 2 47.00 95.47
D/S Water Surface Elev 2 47.00 95.55
Outlet Culvert Top 2 47.00 97.42
Inlet Culvert Top 1 93.00 97.91
Inlet Culvert Top 1 93.00 98.24
U/S Water Surface Elev 1 93.00 95.92
Inlet Culvert Invert (on pipe) 1 93.00 95.78
Inlet Culvert Invert (on pipe) 2 95.00 95.89
U/S Water Surface Elev 2 95.00 96.06
U/S Water Surface Elev 1 96.00 96.06
U/S Grade Ctrl (Thalweg) (1st gradepoint upstream from C1 inlet) 1 96.00 95.69
U/S Grade Ctrl (Thalweg) (1st gradepoint upstream from C2 inlet) 2 97.00 95.71
U/S Water Surface Elev 2 97.00 96.12
U/S Water Surface Elev 105.00 96.11
U/S Grade Ctrl (Thalweg) 105.00 95.44

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): 20.0
 
Gear Type: Minnow Trap (B) Trap Duration(h): 20.0
Comments: No fish caught

Fish Observations

Species: juvenile Chinook salmon Life History: Resident
Total Fish Observed: 2 Fish Measured: 2 Fork Lengths (mm) Min: 65 Max: 70 Mean: 67
Collected/Observed by Gear Type: Not Recorded Minnow Trap (2)  

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