Fish Passage Improvement site 20601545

Fish Passage Site 20601545

Coordinates (dec. deg.): 61.03975°, -151.31818°
Legal Description: S011N012W13
Region: South Central
Road Name: Fish Camp Road

Datum: NAD83
Quad Name / ITM: Tyonek A-4
AWC Stream #: 247-20-10050-2010
Stream Name: Unnamed Tributary to Old Tyonek 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-TY019

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 accuracy = 20 feet.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated Metal)

Fish Passage Rating:

Length(ft): 47.0

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):	2.3	3.1
Height(ft):	1.84	2.04
Apron Length(ft):
Water Depth(ft):	1.4	1.05
Rustline Height(ft):
Substrate Depth(ft):	0.0	0.0

Backwatered?:

Baffles Present: No

Embedded?: No

Outfall Height: -0.01

Outfall Type:

Constriction Ratio: 0.32

Culvert Gradient: 6.79%

Max Slope:

Max Slope Length:

Culvert Observations:

Improper bedding

Stream Measurements

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

Stream Slope(deg.):
Stream Flow Stage:

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Downstream ordinary high water	12.0	11.40
Downstream ordinary high water	46.0	11.00
Downstream ordinary high water	83.0	12.00
Upstream ordinary high water	4.0	10.00
Upstream ordinary high water	40.0	6.70
Upstream ordinary high water	76.0	7.50

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
D/S Tailcrest or 1st Thalweg				87.88
D/S Thalweg		0.00	83.0	86.47
D/S Water Surface Elev		0.00	83.0	86.60
D/S OHW Elev		0.00	83.0	87.24
D/S Water Surface Elev		37.00	46.0	87.48
D/S OHW Elev		37.00	46.0	88.15
D/S Thalweg		37.00	46.0	87.20
Max Pool Depth		81.30	1.7	86.54
D/S Thalweg		81.30	1.7	86.58
Outlet Thalweg	1	83.00	0.0	86.63
Outlet Invert (inacc culvert pointing down)	1	83.00	0.0	87.11
OHW Left Bank		83.00	0.0	88.17
OHW Left Bank		83.00	0.0	88.77
Outlet Culvert Top	1	83.00	0.0	89.15
Road Elev		106.50		96.66
Road Elev		106.50		96.74
Inlet Thalweg	1	130.00	0.0	90.06
Inlet Culvert Invert (innac culvert pointed down)	1	130.00	0.0	90.30
Inlet Culvert Top (at apex of 1st corr)	1	130.00	0.0	92.14
U/S Thalweg	1	131.00	1.0	90.19
U/S Water Surface Elev	1	131.00	1.0	91.75
U/S OHW elevation	1	131.00	1.0	91.89
U/S Thalweg (thalweg follows edge of pool)	1	135.00	5.0	90.54
U/S Thalweg (thalweg follows edge of pool)	1	136.00	6.0	90.76
U/S Water Surface Elev		170.00	40.0	92.23
U/S Headwater		170.00	40.0	92.44
U/S Thalweg		170.00	40.0	91.97
U/S Thalweg		206.00	76.0	93.65
U/S Water Surface Elev		206.00	76.0	93.89
U/S Headwater		206.00	76.0	94.24

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): 2.33

Gear Type: Minnow Trap, 1/4 in. Mesh (B)		Trap Duration(h): 1.83

Fish Observations

Species: juvenile Dolly Varden		Life History: Unknown
Total Fish Observed: 10	Fish Measured: 5	Fork Lengths (mm) Min: 69 Max: 119 Mean: 91
Collected/Observed by Gear Type: Downstream Minnow Trap, 1/4 in. Mesh (10)

Species: juvenile coho salmon		Life History: Anadromous
Total Fish Observed: 24	Fish Measured: 10	Fork Lengths (mm) Min: 60 Max: 111 Mean: 72
Collected/Observed by Gear Type: Downstream Minnow Trap, 1/4 in. Mesh (24)

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)

Photos

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