The Manatee County Port Authority approved construction in 2012 for a
584-foot extension of Berth 12 wharf as a deep water sheet pile bulkhead and a
10 acre container yard, finishing a port expansion project originating in 1997.
The completed berth 12 is now 1,584 feet long with a 40-foot draft and capable
of handling Panamax-sized ships arriving at Port Manatee’s first dedicated
container facility. As a subcontractor to American Bridge, our scope of work
included the site work consisting of approximately 84,000 cy of on-site
excavation, 62,000 cy of off-site borrow fill, 56,700 sy of 24 inch stabilized
sub base, 56,700 sy of 12 inch lime rock base, 2,450 lf of water main, 1,400 lf
of storm drainage pipe, 390 lf of 12 foot x 6 foot box culvert, erosion
controls, and various concrete structures.
To construct the lime rock base courses we purchased 46,500 tons of
Mexican lime rock base which was shipped directly to the port in cargo ships.
It was then off loaded from the ships to just a short distance from our work
area making our on site trucking of the material minimal. The earthwork was
challenging as well. The existing soil
on the site originated from previous dredging projects and was thus unsuitable
for our use as backfill materials. We were however able to mix and blend some
of these materials to produce a suitable LBR 40 stabilized sub grade and haul
the remaining excess soil to an owner provided spoil area.