Fish Passage Improvement site 20301009

Fish Passage Site 20301009

Coordinates (dec. deg.): 60.70407°, -150.86918°
Legal Description: S007N009W16
Region: South Central
Road Name: Swanson River Road, off of

Datum: NAD83
Quad Name / ITM: Kenai C-3
AWC Stream #: 247-90-10020-2036
Stream Name: Mink 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 KPCS1-NK081

site photos

Observers: Cecil Rich, James Maple, Jeff Davis, Tom Sigurdsson

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:

Comments: Damaged inlet pipe but still functional. Outlet pipe invert about two inches above substrate.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated Metal)

Fish Passage Rating:

Length(ft): 39.0

Inlet Type: Projecting

Outlet Type:

Corrugation Depth(in.): 0.5

Corrugation Width(in.): 3.0

Condition Rating(1-5):

Approach Angle:

Sedimentation At Inlet:

Inlet Substrate: None

Outlet Substrate: None

	Inlet	Outlet
Width(ft):	3.9	3.9
Height(ft):	3.95	4.08
Apron Length(ft):
Water Depth(ft):	0.4	0.54
Rustline Height(ft):
Substrate Depth(ft):	0.0	0.0

Backwatered?:

Baffles Present: No

Embedded?: No

Outfall Height: 0.0

Outfall Type:

Constriction Ratio: 0.47

Culvert Gradient: 0.97%

Max Slope:

Max Slope Length:

Stream Measurements

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

Stream Slope(deg.):
Stream Flow Stage:

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Downstream ordinary high water	31.0	11.70
Downstream ordinary high water	79.0	11.90
Downstream ordinary high water	122.0	11.00
Upstream ordinary high water	5.0	8.00
Upstream ordinary high water	50.0	10.10
Upstream ordinary high water	100.0	6.40

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
D/S Thalweg				92.20
D/S Water Surface Elev		0.00	122.0	92.44
D/S OHW Elev		0.00	122.0	91.79
D/S Thalweg		0.00	122.0	92.98
D/S Water Surface Elev		43.00	79.0	93.29
D/S Thalweg		43.00	79.0	92.60
D/S OHW Elev		43.00	79.0	93.77
D/S Tailcrest or 1st Thalweg		91.00	31.0	93.55
D/S Water Surface Elev		91.00	31.0	94.47
OHW Left Bank		91.00	31.0	94.80
OHW Left Bank		117.00	5.0	95.16
OHW Left Bank		117.00	5.0	94.76
Max Pool Depth		117.00	5.0	93.30
Outlet Invert	1	122.00	0.0	94.22
Outlet Thalweg	1	122.00	0.0	94.22
Outlet Culvert Top	1	122.00	0.0	98.30
Outlet Rustline Height	1	122.00	0.0	95.18
Road Elev		141.50		98.93
Road Elev		141.50		99.60
Inlet Rustline Height	1	161.00	0.0	95.85
Inlet Culvert Top	1	161.00	0.0	98.55
Inlet Culvert Invert	1	161.00	0.0	94.60
Inlet Thalweg	1	161.00	0.0	94.60
U/S Thalweg	1	162.00	1.0	94.55
U/S Thalweg	1	166.00	5.0	94.01
U/S OHW elevation	1	166.00	5.0	95.45
U/S Water Surface Elev	1	166.00	5.0	95.16
U/S Thalweg	1	168.80	7.8	93.57
U/S Thalweg		211.00	50.0	92.97
U/S Water Surface Elev		211.00	50.0	95.18
U/S Headwater		211.00	50.0	95.55
U/S Water Surface Elev		261.00	100.0	95.18
U/S Headwater		261.00	100.0	95.53
U/S Thalweg		261.00	100.0	92.64

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): 2.02

Gear Type: Minnow Trap (B)		Trap Duration(h): 2.34

Fish Observations

Species: adult stickleback-unspecified		Life History: Resident
Total Fish Observed: 19	Fish Measured:	Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Downstream Minnow Trap (9) Upstream Minnow Trap (10)

Species: juvenile coho salmon		Life History: Anadromous
Total Fish Observed: 53	Fish Measured: 20	Fork Lengths (mm) Min: 55 Max: 100 Mean: 81
Collected/Observed by Gear Type: Downstream Minnow Trap (28) Upstream Minnow Trap (25)

Species: juvenile rainbow trout		Life History: Resident
Total Fish Observed: 40	Fish Measured: 16	Fork Lengths (mm) Min: 66 Max: 125 Mean: 91
Collected/Observed by Gear Type: Downstream Minnow Trap (12) Upstream Minnow Trap (28)

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: Downstream Minnow Trap (1)

Photos

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