Fish Passage Improvement site 20601552

Fish Passage Site 20601552

Coordinates (dec. deg.): 61.03972°, -151.47273°
Legal Description: S011N012W18
Region: South Central
Road Name:

Datum: NAD83
Quad Name / ITM: Tyonek A-4
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: Site is 23.1 feet US of 027 inlet

Survey Date: Jun 19, 2002

Survey TYCS1-TY026

site photos

Observers: Cecil Rich, Michael Anderson, Joe Buckwalter

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:

Comments: Datum = WGS84. GPS acccuracy 19.8. Site is 23.1 feet US of 027 inlet. Began with inst. 3 from site 027. Site scheduled to be removed by DNR.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated Metal)

Fish Passage Rating:

Length(ft): 61.0

Inlet Type: Projecting

Outlet Type:

Corrugation Depth(in.): 0.5

Corrugation Width(in.): 2.625

Condition Rating(1-5):

Approach Angle:

Sedimentation At Inlet:

Inlet Substrate: None

Outlet Substrate: None

	Inlet	Outlet
Width(ft):	1.68	2.0
Height(ft):		2.0
Apron Length(ft):
Water Depth(ft):	0.33	0.2
Rustline Height(ft):
Substrate Depth(ft):	0.0	0.0

Backwatered?:

Baffles Present: No

Embedded?: No

Outfall Height: 1.84

Outfall Type:

Constriction Ratio: 0.18

Culvert Gradient: 5.46%

Max Slope:

Max Slope Length:

Culvert Observations:

None of this type

Stream Measurements

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

Stream Slope(deg.):
Stream Flow Stage:

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Downstream ordinary high water	10.0	7.80
Upstream ordinary high water	5.0	4.20
Upstream ordinary high water	141.5	6.70
Upstream ordinary high water	166.5	12.40

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
D/S Tailcrest or 1st Thalweg				97.88
D/S Thalweg		0.00	10.2	98.04
D/S Water Surface Elev		0.00	10.2	98.37
D/S OHW Elev		0.00	10.2	99.03
OHW Left Bank		6.90	3.3	98.46
OHW Left Bank		6.90	3.3	98.88
D/S Thalweg		7.20	3.0	96.78
Max Pool Depth	1	7.20	3.0	96.78
Outlet Thalweg	1	10.20	0.0	97.51
Outlet Invert	1	10.20	0.0	100.10
Outlet Rustline Height	1	10.20	0.0	100.59
Outlet Culvert Top	1	10.20	0.0	102.10
Road Elev		40.70		109.02
Road Elev		40.70		109.46
Inlet Culvert Top	1	71.20	0.0	105.49
Inlet Thalweg	1	71.20	0.0	102.25
Inlet Culvert Invert	1	71.20	0.0	103.43
Inlet Rustline Height (moss line)	1	71.20	0.0	103.99
U/S Thalweg	1	72.20	1.0	102.21
U/S OHW elevation	1	72.20	1.0	104.27
U/S Thalweg	1	74.56	3.36	102.46
U/S Thalweg	1	76.20	5.0	102.56
U/S Water Surface Elev	1	76.20	5.0	103.78
U/S Thalweg		212.70	141.5	104.14
U/S Water Surface Elev		212.70	141.5	104.43
U/S Headwater		212.70	141.5	104.75
U/S Thalweg		237.70	166.5	105.40
U/S Water Surface Elev		237.70	166.5	105.72
U/S Headwater		237.70	166.5	106.10

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 Dolly Varden		Life History: Resident
Total Fish Observed: 24	Fish Measured: 12	Fork Lengths (mm) Min: 87 Max: 171 Mean: 122
Collected/Observed by Gear Type: Downstream Minnow Trap, 1/4 in. Mesh (16) Upstream Minnow Trap, 1/4 in. Mesh (8)

Photos

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