Fish Passage Site 20300960

Coordinates (dec. deg.): 60.75089°, -149.25113°
Legal Description: S008N001E27
Region: South Central
Road Name: Seward Highway

Datum: NAD83
Quad Name / ITM: Seward D-6
AWC Stream #:
Stream Name: Bertha Creek

Elevation:

Site Comments: None

Survey Date: Oct 03, 2001

Survey KPCS1-EK094

Observers: Cecil Rich, James Maple, Tom Sigurdsson

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: Riprap in banks 50 - 60 feet upstream. Debris rack in need of repair.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 128.0
Inlet Type: Mitered
Outlet Type:
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: Boulder
Outlet Substrate: Gravel
InletOutlet
Width(ft):8.7 9.7
Height(ft):9.73 7.62
Apron Length(ft):
Water Depth(ft):0.94 2.42
Rustline Height(ft):
Substrate Depth(ft):0.0 2.08
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio: 0.76
Culvert Gradient:
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type
ID: 2 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 129.0
Inlet Type: Mitered
Outlet Type:
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: Boulder
Outlet Substrate: Gravel
InletOutlet
Width(ft):8.6 9.9
Height(ft):8.06 8.96
Apron Length(ft):
Water Depth(ft):0.92 1.08
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio: 0.76
Culvert Gradient:
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:BoulderBoulder
Subdominant:CobbleCobble
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 28.00
Downstream ordinary high water 50.0 17.40
Downstream ordinary high water 100.0 16.00
Upstream ordinary high water 5.0 22.70
Upstream ordinary high water 50.0 18.40
Upstream ordinary high water 100.0 26.90

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Thalweg 0.00 100.0 78.50
D/S Water Surface Elev 0.00 100.0 79.71
D/S OHW Elev 0.00 100.0 80.83
D/S Thalweg 50.00 50.0 81.87
D/S Water Surface Elev 50.00 50.0 82.81
D/S OHW Elev 50.00 50.0 83.62
OHW Left Bank 95.00 5.0 86.06
OHW Left Bank 95.00 5.0 88.79
Outlet Thalweg 1 100.00 0.0 86.50
Outlet Rustline Height 2 100.00 0.0 87.56
Outlet Rustline Height 1 100.00 0.0 87.77
Outlet Thalweg 2 100.00 0.0 85.33
Outlet Culvert Top 1 100.00 0.0 94.12
Outlet Culvert Top 2 100.00 0.0 94.29
Road Elev 164.00 110.94
Road Elev 164.00 111.21
Inlet Culvert Top 1 228.00 0.0 100.85
Inlet Culvert Top 2 228.00 0.0 101.27
Inlet Rustline Height 2 228.00 0.0 94.12
Inlet Culvert Invert 1 228.00 0.0 91.12
Inlet Thalweg 1 228.00 0.0 91.12
Inlet Rustline Height 1 228.00 0.0 92.85
Inlet Culvert Invert 2 228.00 0.0 93.21
Inlet Thalweg 2 228.00 0.0 93.21
U/S Thalweg 2 229.00 1.0 93.23
U/S Thalweg 1 229.00 1.0 92.58
U/S Thalweg 1 233.00 5.0 92.58
U/S Water Surface Elev 1 233.00 5.0 92.69
U/S Thalweg 2 233.00 5.0 93.29
U/S Water Surface Elev 2 233.00 5.0 94.21
U/S OHW elevation 1 233.00 5.0 95.06
U/S OHW elevation 2 233.00 5.0 95.71
U/S Thalweg 1 246.40 18.4 93.79
U/S Thalweg 2 246.50 18.5 93.79
U/S Water Surface Elev 278.00 50.0 95.87
U/S Thalweg 278.00 50.0 94.75
U/S Headwater 278.00 50.0 97.58
U/S Water Surface Elev 328.00 100.0 98.31
U/S Headwater 328.00 100.0 99.10
U/S Thalweg 328.00 100.0 97.56

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): 1.3
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.3

Fish Observations

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: Downstream Minnow Trap (0)  Upstream Minnow Trap (0)  

Questions or comments about this report can be directed to dfg.dsf.webmaster@alaska.gov