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POA-2005-1976, Portage Cove

Published Sept. 24, 2015
Expiration date: 10/24/2015

The applicant, Haines Borough's, stated purpose is to construct harbor and wave protection facilities to increase capacity

while providing safe vessel navigation, moorage, launching, loading, staging and parking improvements, and provide clearance

for proposed boat launch, drive down float, and additional vessel moorage.

PROPOSED WORK:  The applicant requests authorization for the following work in waters of the United States (U.S.):

• Dredge approximately 129,450 cubic yards (cy) of marine sediment from approximately 7.93 acres below the Mean High

Water mark (MHW), (approximate elevation +15.8 feet above the 0.0 foot contour), to provide sufficient water depth vessels at

all tidal ranges.  The disposal of 104,450 cy of the dredged material is proposed through the discharge over 50 acres of the

seafloor at a location approximately 1.5 miles northeast of the proposed dredging site at Latitude 59.238333º N., Longitude

135.400639º W. in Chilkoot Inlet.

• Discharge approximately 23,380 cubic yards of armor rock and 19,320 cy of dredged material into approximately 3.73

acres below the plane of the High Tide Line (HTL), (approximate elevation +21.2 feet above the 0.0 foot contour),to construct

a parking area, boat launch ramp, and protect the dredged area slopes.

• Remove from below MHW and dispose one 11 feet wide by 136 feet long transient float including six 12-inch diameter

steel piles and all miscellaneous mountinng hardware and appurtenances.

• Remove from below MHW and relocate one 36 feet wide by 42 feet long seaplane float  including two 16-inch diameter

steel piles and all miscellaneous mounting hardware and appurtenances.

• Replace from below MHW three 12-inch diameter steel piles from transient float designated to remain.

• Replace from below MHW 1,800 linear feet of 16-inch diameter High Density Polyethylene (HDPE) sewer outfall pipe;

replace 70 linear feet of 16-inch diameter ductile iron pipe sewer outfall diffuser.

• Relocate from below MHW one 28 feet wide by 50 long, pile-supported, (four 24-inch diameter steel) work float.

• Install below MHW one 10 feet wide by 320 feet long, pile-supported, (sixteen 16-inch diameter steel), headwalk

float.

• Install below MHW one 10 feet wide by 275 feet, pile-supported, (ten 16-inch diameter steel), long mainwalk float.

• Install below MHW one 10 feet wide by 230 feet long, pile-supported, (ten 16-inch diameter steel), mainwalk float.

• Install below MHW one 10 feet wide by 124 feet long, pile-supported, (ten 16-inch diameter steel), transient float.

• Install below MHW six 5 feet wide by 42 feet long, pile-supported, (six 16-inch diameter steel), finger floats.

• Install below MHW twelve 4 feet wide by 32 feet long finger floats.

• Install below MHW one 44 feet wide by 300 feet long, pile-supported, (ten 12-inch diameter steel), boarding float.

• Install below MHW one 50 feet wide by 180 feet long, pile-supported, (twelve 24-inch diameter steel), drive down

float with one 17 feet wide by 145 feet long, pile-supported, (eight 16-inch diameter steel), transfer bridge.

• Install below MHW one 20 feet wide by 40 feet long, pile-supported (twelve 16-inch diameter steel), approach dock

with one 7 feet wide by 80 feet long covered aluminum gangway and one 20 feet wide by 20 feet long gangway landing float

• Install below MHW 700 linear feet of wave barrier with navigational lighting; supported with forty-eight 30-inch

diameter steel bearing piles and one hundred thirty-one 24-inch diameter steel barrier piles with sheet pile wings.

• Install below MHW 2,650 linear feet of HDPE sewer outfall piple with diffuser.  Work would include installation of

900 linear feet of corrugated polyethylene drainage pipe, three concrete storm drain manholes, one storm drain oil water

separator, and one concrete storm drain outfall with check valve and debris protection grate.

All work would be performed in accordance with the enclosed plan (sheets 1 - 20), dated July 30 , 2015.

Comments on the described work, with the reference number, should reach this office no later than the expiration date of this

Public Notice to become part of the record and be considered in the decision.  Please contact Randal Vigil at (907) 790-4491

or by email at Randal.P.Vigil @usace.army.mil if further information is desired concerning this notice.

POA-2005-1976, Portage Cove _PN.pdf

 


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