Fish Passage Improvement site 20601548

Fish Passage Site 20601548

Coordinates (dec. deg.): 61.07870°, -151.57230°
Legal Description: S011N013W03
Region: South Central
Road Name:

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

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-TY022

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. 20.2 feet = gps accuracy

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated Metal)

Fish Passage Rating:

Length(ft): 41.0

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):	3.66	3.75
Height(ft):	3.46	4.17
Apron Length(ft):
Water Depth(ft):	0.33	0.28
Rustline Height(ft):
Substrate Depth(ft):	0.0	0.0

Backwatered?:

Baffles Present: No

Embedded?: No

Outfall Height: 0.69

Outfall Type:

Constriction Ratio: 0.31

Culvert Gradient: 4.85%

Max Slope:

Max Slope Length:

Culvert Observations:

None of this type

Stream Measurements

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

Stream Slope(deg.):
Stream Flow Stage:

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Downstream ordinary high water	17.0	19.90
Downstream ordinary high water	80.0	16.00
Downstream ordinary high water	167.0	18.00
Upstream ordinary high water	5.0	9.30
Upstream ordinary high water	42.0	13.00
Upstream ordinary high water	104.0	10.50

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
D/S Tailcrest or 1st Thalweg				88.66
D/S Thalweg		0.00	167.0	83.47
D/S Water Surface Elev		0.00	167.0	83.75
D/S OHW Elev		0.00	167.0	84.34
D/S Thalweg		87.00	80.0	86.95
D/S Water Surface Elev		87.00	80.0	87.45
D/S OHW Elev		87.00	80.0	88.36
D/S Thalweg		162.00	5.0	85.85
Max Pool Depth	1	162.00	5.0	85.85
OHW Left Bank		162.00	5.0	88.92
OHW Left Bank		162.00	5.0	89.18
Outlet Invert	1	167.00	0.0	89.33
Outlet Rustline Height	1	167.00	0.0	90.36
Outlet Thalweg	1	167.00	0.0	87.82
Outlet Culvert Top	1	167.00	0.0	93.50
Road Elev		187.50		95.15
Road Elev		187.50		95.60
Inlet Culvert Top	1	208.00	0.0	94.78
Inlet Culvert Invert	1	208.00	0.0	91.32
Inlet Thalweg	1	208.00	0.0	91.33
Inlet Rustline Height	1	208.00	0.0	91.68
U/S Thalweg	1	209.00	1.0	91.34
U/S OHW elevation	1	209.00	1.0	92.84
U/S Thalweg	1	213.00	5.0	91.80
U/S Water Surface Elev	1	213.00	5.0	92.03
U/S Thalweg	1	215.32	7.32	92.07
U/S Thalweg		250.00	42.0	93.34
U/S Water Surface Elev		250.00	42.0	93.46
U/S Headwater		250.00	42.0	93.71
U/S Thalweg		312.00	104.0	94.31
U/S Water Surface Elev		312.00	104.0	94.73
U/S Headwater		312.00	104.0	95.08

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): 1

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

Fish Observations

Species: juvenile/adult Dolly Varden		Life History: Unknown
Total Fish Observed: 13	Fish Measured: 5	Fork Lengths (mm) Min: 82 Max: 117 Mean: 96
Collected/Observed by Gear Type: Downstream Minnow Trap, 1/4 in. Mesh (6) Upstream Minnow Trap, 1/4 in. Mesh (7)

Photos

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