Fish Passage Improvement site 20300963

Fish Passage Site 20300963

Coordinates (dec. deg.): 60.78971°, -149.20964°
Legal Description: S008N001E13
Region: South Central
Road Name: Seward Highway

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

Elevation:

Site Comments: None

Survey Date: Oct 04, 2001

Survey KPCS1-EK097

site photos

Observers: Cecil Rich, James Maple, Tom Sigurdsson

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:

Comments: Headwall separated 1-2 feet from outlet.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated Metal)

Fish Passage Rating:

Length(ft): 160.8

Inlet Type: Headwall

Outlet Type:

Corrugation Depth(in.): 0.5

Corrugation Width(in.): 3.0

Condition Rating(1-5):

Approach Angle:

Sedimentation At Inlet:

Inlet Substrate: Boulder

Outlet Substrate: None

	Inlet	Outlet
Width(ft):	4.4	4.4
Height(ft):	4.54	4.39
Apron Length(ft):
Water Depth(ft):	1.29	0.98
Rustline Height(ft):
Substrate Depth(ft):	0.0	0.0

Backwatered?:

Baffles Present: No

Embedded?: No

Outfall Height: -0.06

Outfall Type:

Constriction Ratio: 0.32

Culvert Gradient: 1.33%

Max Slope:

Max Slope Length:

Culvert Observations:

None of this type

Stream Measurements

Stream Substrates	Upstream	Downstream
Dominant:	Gravel	Gravel
Subdominant:	Gravel	Boulder

Stream Slope(deg.):
Stream Flow Stage:

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Downstream ordinary high water	18.0	15.70
Downstream ordinary high water	50.0	12.10
Downstream ordinary high water	100.0	12.00
Upstream ordinary high water	5.0	12.40
Upstream ordinary high water	50.0	12.30
Upstream ordinary high water	100.0	15.10

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
D/S Thalweg		0.00	100.0	85.35
D/S Water Surface Elev		0.00	100.0	85.73
D/S OHW Elev		0.00	100.0	86.00
D/S Water Surface Elev		50.00	50.0	85.96
D/S Thalweg		50.00	50.0	85.58
D/S OHW Elev		50.00	50.0	86.33
D/S Water Surface Elev		82.00	18.0	87.19
OHW Left Bank		82.00	18.0	87.44
D/S Tailcrest or 1st Thalweg		82.00	18.0	86.21
Max Pool Depth		95.00	5.0	85.90
D/S Thalweg		95.00	5.0	85.90
OHW Left Bank		95.00	5.0	87.23
OHW Left Bank		95.00	5.0	87.71
Outlet Rustline Height	1	100.00	0.0	87.56
Outlet Invert	1	100.00	0.0	86.19
Outlet Thalweg	1	100.00	0.0	86.19
Outlet Culvert Top	1	100.00	0.0	90.58
Road Elev		180.00		113.12
Road Elev		180.00		114.45
Inlet Culvert Top	1	260.00	0.0	92.87
Inlet Rustline Height	1	260.00	0.0	90.58
Inlet Culvert Invert	1	260.00	0.0	88.33
Inlet Thalweg	1	260.00	0.0	88.33
U/S Thalweg	1	261.00	1.0	88.70
U/S Thalweg	1	265.00	5.0	89.81
U/S Water Surface Elev	1	265.00	5.0	90.18
U/S OHW elevation	1	265.00	5.0	91.43
U/S Thalweg	1	268.80	8.8	89.77
U/S Thalweg		310.00	50.0	90.27
U/S Headwater		310.00	50.0	91.31
U/S Water Surface Elev		310.00	50.0	90.72
U/S Thalweg		360.00	100.0	90.89
U/S Water Surface Elev		360.00	100.0	91.22
U/S Headwater		360.00	100.0	91.50

Notes:

River distance is measured continuously throughout the survey reach along the thalweg of the stream.
Measured from each end of the crossing along the thalweg of the stream.

Fish Sampling Efforts

Gear Type: Minnow Trap (A)		Trap Duration(h): 1.15

Gear Type: Minnow Trap (B)		Trap Duration(h): 1.05

Fish Observations

Species: juvenile Dolly Varden		Life History: Resident
Total Fish Observed: 36	Fish Measured: 18	Fork Lengths (mm) Min: 29 Max: 159 Mean: 114
Collected/Observed by Gear Type: Downstream Minnow Trap (20) Upstream Minnow Trap (16)

Photos

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