Fish Passage Improvement site 20601547

Fish Passage Site 20601547

Coordinates (dec. deg.): 61.08033°, -151.57807°
Legal Description: S012N013W34
Region: South Central
Road Name:

Datum: NAD83
Quad Name / ITM: Tyonek A-5
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: None

Survey Date: Jun 18, 2002

Survey TYCS1-TY021

site photos

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 17.5 ft.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated Metal)

Fish Passage Rating:

Length(ft): 40.3

Inlet Type: Headwall

Outlet Type:

Corrugation Depth(in.): 0.5

Corrugation Width(in.): 2.625

Condition Rating(1-5):

Approach Angle:

Sedimentation At Inlet:

Inlet Substrate:

Outlet Substrate: Silt/Clay

	Inlet	Outlet
Width(ft):	4.15	3.9
Height(ft):		2.16
Apron Length(ft):
Water Depth(ft):	0.18	0.3
Rustline Height(ft):
Substrate Depth(ft):

Backwatered?:

Baffles Present: No

Embedded?: No

Outfall Height:

Outfall Type:

Constriction Ratio: 0.86

Culvert Gradient:

Max Slope:

Max Slope Length:

Stream Measurements

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

Stream Slope(deg.):
Stream Flow Stage:

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Downstream ordinary high water	21.0	4.00
Downstream ordinary high water	68.0	4.00
Upstream ordinary high water	5.0	4.20
Upstream ordinary high water	24.0	5.30
Upstream ordinary high water	63.0	4.30

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
D/S Tailcrest or 1st Thalweg				95.27
D/S Thalweg		0.00	68.0	92.29
D/S Water Surface Elev		0.00	68.0	92.40
D/S OHW Elev		0.00	68.0	92.85
D/S Thalweg		47.00	21.0	94.65
D/S Water Surface Elev		47.00	21.0	94.78
D/S OHW Elev		47.00	21.0	95.06
OHW Left Bank		63.00	5.0	95.44
OHW Left Bank		63.00	5.0	95.70
D/S Thalweg		65.00	3.0	94.96
Max Pool Depth	1	65.00	3.0	94.96
Outlet Thalweg	1	68.00	0.0	95.16
Outlet Rustline Height	1	68.00	0.0	95.68
Outlet Culvert Top	1	68.00	0.0	97.32
Road Elev		88.00		105.82
Road Elev		88.00		105.92
Inlet Rustline Height	1	108.00	0.0	96.11
Inlet Culvert Top	1	108.00	0.0	98.62
Inlet Thalweg	1	108.00	0.0	95.67
U/S Thalweg	1	109.00	1.0	95.48
U/S OHW elevation	1	109.00	1.0	96.31
U/S Thalweg	1	113.00	5.0	95.83
U/S Water Surface Elev	1	113.00	5.0	96.07
U/S Thalweg	1	116.30	8.3	96.23
U/S Thalweg		132.00	24.0	97.36
U/S Water Surface Elev		132.00	24.0	97.54
U/S Headwater		132.00	24.0	97.84
U/S Thalweg		171.00	63.0	100.14
U/S Water Surface Elev		171.00	63.0	100.30
U/S Headwater		171.00	63.0	100.65

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, 1/4 in. Mesh (A)		Trap Duration(h): 2

Gear Type: Minnow Trap, 1/4 in. Mesh (B)		Trap Duration(h): 2

Fish Observations

Species: juvenile/adult Dolly Varden		Life History: Resident
Total Fish Observed: 4	Fish Measured: 2	Fork Lengths (mm) Min: 115 Max: 118 Mean: 116
Collected/Observed by Gear Type: Upstream Minnow Trap, 1/4 in. Mesh (4)

Species: juvenile coho salmon		Life History: Anadromous
Total Fish Observed: 50	Fish Measured: 20	Fork Lengths (mm) Min: 50 Max: 70 Mean: 57
Collected/Observed by Gear Type: Downstream Minnow Trap, 1/4 in. Mesh (28) Upstream Minnow Trap, 1/4 in. Mesh (22)

Species: juvenile/adult sculpin-unspecified		Life History: Resident
Total Fish Observed: 1	Fish Measured:	Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Upstream Minnow Trap, 1/4 in. Mesh (1)

Species: sculpin-unspecified		Life History: Resident
Total Fish Observed: 4	Fish Measured: 2	Fork Lengths (mm) Min: 45 Max: 55 Mean: 50
Collected/Observed by Gear Type: Downstream Minnow Trap, 1/4 in. Mesh (4)

Photos

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