Fish Passage Site 20601550

Coordinates (dec. deg.): 61.06847°, -151.51324°
Legal Description: S011N013W01
Region: South Central
Road Name:

Datum: NAD83
Quad Name / ITM: Tyonek A-5
AWC Stream #: 247-10-10200-2215
Stream Name: Stedatna Creek

Elevation:

Site Comments: None

Multiple surveys have been conducted at this site — click on the drop down
arrow to the right of the survey date below to choose a different report for this site.

Survey TYCS1-TY024

Observers: Cecil Rich, Michael Anderson, Joe Buckwalter

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: Datum = WGS84. gps accuracy = 26.8 feet.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Non-corrugated metal) Fish Passage Rating:
 
Length(ft): 58.9
Inlet Type: Projecting
Outlet Type:
Corrugation Depth(in.):
Corrugation Width(in.):
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):4.22 4.1
Height(ft): 4.1
Apron Length(ft):
Water Depth(ft):0.45 0.58
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height: 0.04
Outfall Type:
Constriction Ratio: 0.26
Culvert Gradient: 2.56%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Improper bedding

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleGravel
Subdominant:GravelBoulder
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 13.0 24.50
Downstream ordinary high water 45.0 26.00
Downstream ordinary high water 115.0 16.00
Upstream ordinary high water 5.0 9.40
Upstream ordinary high water 50.0 16.00
Upstream ordinary high water 100.0 16.80

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Tailcrest or 1st Thalweg 81.25
D/S Thalweg 0.00 115.0 78.36
D/S Water Surface Elev 0.00 115.0 78.65
D/S OHW Elev 0.00 115.0 79.68
D/S OHW Elev 70.00 45.0 81.68
D/S Thalweg 70.00 45.0 80.85
D/S Water Surface Elev 70.00 45.0 81.21
D/S Thalweg 106.50 8.5 80.16
Max Pool Depth 1 110.00 5.0 81.06
OHW Left Bank 110.00 5.0 82.51
OHW Left Bank 110.00 5.0 82.75
Outlet Thalweg 1 115.00 0.0 81.72
Outlet Invert (entire pipe rusted) 1 115.00 0.0 81.97
Outlet Culvert Top 1 115.00 0.0 86.07
Road Elev 144.00 95.50
Road Elev 144.00 95.71
Inlet Culvert Top 1 173.00 0.0 87.66
Inlet Thalweg (entire culvert rusted) 1 173.00 0.0 83.33
Inlet Culvert Invert 1 173.00 0.0 83.48
U/S Thalweg 1 174.00 1.0 83.09
U/S OHW elevation 1 174.00 1.0 84.97
U/S Water Surface Elev 1 178.00 5.0 84.17
U/S Thalweg 1 178.00 5.0 83.63
U/S Thalweg 1 181.40 8.4 83.91
U/S Thalweg 223.00 50.0 85.03
U/S Water Surface Elev 223.00 50.0 85.36
U/S Headwater 223.00 50.0 86.10
U/S Thalweg 292.00 119.0 86.94
U/S Water Surface Elev 292.00 119.0 87.10
U/S Headwater 292.00 119.0 88.01

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, 1/4 in. Mesh (A) Trap Duration(h): 1
 
Gear Type: Minnow Trap, 1/4 in. Mesh (B) Trap Duration(h): 1

Fish Observations

Species: juvenile Dolly Varden Life History: Resident
Total Fish Observed: 12 Fish Measured: 6 Fork Lengths (mm) Min: 91 Max: 125 Mean: 107
Collected/Observed by Gear Type: Downstream Minnow Trap, 1/4 in. Mesh (12)  
 
Species: juvenile rainbow trout Life History: Resident
Total Fish Observed: 12 Fish Measured: 6 Fork Lengths (mm) Min: 83 Max: 123 Mean: 108
Collected/Observed by Gear Type: Downstream Minnow Trap, 1/4 in. Mesh (12)  
 
Species: no fish collected or observed Life History: Not Applicable
Total Fish Observed: 0 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Upstream Minnow Trap, 1/4 in. Mesh (0)  

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