Fish Passage Improvement site 30103628

Fish Passage Site 30103628

Coordinates (dec. deg.): 51.84939°, -176.65382°
Legal Description: S096S195W22
Region: Southwest
Road Name: Finger Bay Road

Datum: NAD83
Quad Name / ITM: Adak C-2
AWC Stream #: 306-70-10225
Stream Name: Mitt Creek

Elevation:

Site Comments: None

Survey Date: Sep 16, 2017

Survey ADAK17-C112

site photos

Observers: Mark Eisenman, Jeanette Alas

Overall Fish Passage Rating: Gray

Tidal: Yes
Backwatered: No

Step Pools: No
Construction Year:

Comments: This information was gathered as part of the joint reconnaissance level project between the ADF&G Habitat Division and the Fish Passage Assessment Project on Adak Island. Due to time constraints full site assessments were not conducted, but base line information was collected. Mitt Creek enters Sweeper Cove directly downstream of outlet. Outlet perched at low tide and maybe even at most high tides. Culvert outlet undercut.

Culvert Measurements

ID: 1

Structure Type: Box culvert (Reinforced concrete)

Fish Passage Rating: Gray

Length(ft): 62.0

Inlet Type: Headwall

Outlet Type: Headwall

Corrugation Depth(in.):

Corrugation Width(in.):

Condition Rating(1-5): 2

Approach Angle:

Sedimentation At Inlet: Yes

Inlet Substrate:

Outlet Substrate: None

	Inlet	Outlet
Width(ft):	3.5	3.5
Height(ft):	4.5	4.5
Apron Length(ft):
Water Depth(ft):
Rustline Height(ft):
Substrate Depth(ft):		0.0

Backwatered?: No

Baffles Present: No

Embedded?: No

Outfall Height:

Outfall Type: Free Fall on To Rip Rap

Constriction Ratio:

Culvert Gradient:

Max Slope:

Max Slope Length:

Comments: Outfall greater than 1 foot at low tides. Culvert may be innundated at very high tides, but looks like there might still be an outfall at most high tides. Outlet apron creates low water depth barrier.