National Harbor Marina

Specialty Underwater Services (SUS), was awarded the work to provide selective demolition of the existing steel and UHMW fender panel system at the existing Loading Platform Bulkhead. Work consisted of the extraction of 16 existing 12x53 H Piles 80’ in length and the fabrication of a new steel fender panel system utilizing 14x73  H-Piles and 12”x12” timber blocks. The new system was sandblasted and coated prior to installation. SUS used a 44B Ice vibrator hammer to drive 11 new 14x73 H-Piles 85’ long with the new panels field welded to the H-Piles to complete the new fender system.

SUS performed the removal of 20 each Concrete Anchored Marine Navaigational Buoys and replaced them with the installation of 20 pile-supported channel markers along a key section of the Intracoastal Waterway, stretching from Little Egg Harbor to the Metedeconk River. This  project  enhances  the  safety  and  navigability of this busy waterway.

The project involved driving 70 linear foot pipe piles at precise GPS coordinates utilizing a 200 ton crane situated on a 155’ x 55’ ABS-rated crane barge.  Once  driven,  fabricated steel hangers along with Owner supplied day beacons and marker lights were installed using a telescopic boom lift secured to the crane barge. All work was performed in close coordination with the USCG and a disabled veterans construction firm.

SUS inspected the existing marine structure catwalk, removed it and installed a new structural catwalk.

SUS installed a new fire line for Anne Arundel County. Our team mobilized to excavate and remove an existing 6-inch fire line, replacing it with a durable 6-inch HDPE fire line tailored for long-term use. In addition to the pipeline work, SUS installed a roadside adaptor, enabling the Anne Arundel County Fire Department to quickly connect to the water supply in emergency situations.

SUS mobilized and installed a concrete support pad to hold a prefabricated storage shed. SUS also excavated and installed 2” and 12” HDPE pipes to be used as the air delivery system.

Specialty Underwater Services was contracted to perform work for Concrete General, Inc and Maryland State Highway Administration to assist in the repairs to Maryland Route 6, New Market Turner Road over Persimmon Creek. The work consisted of the installation of 2 each 60’ long test piles and62 each 60’ long production piles utilizing 12 x53HP’s. The project also required the installation 2each 3 sided coffer cells with 46 pair of PZC18sheet piling - 50 feet in length. The coffer cells also including the installation of 2 wales.

Our 80-ton crane barge was mobilized to Cobb Island to remove multiple timber pile obstructions from the Neal Sound Channel, making the navigable waters safe for vessel traffic.

SUS was chartered for a unique project that required taking delivery of two custom fabricated, restaurant-equipped sea containers at our waterfront fleeting facility in Baltimore, and placing and securing them onto our deck barge. After the containers were secure, SUS then delivered them by water and set them with our heavy lift crane barge onto a newly renovated pier at RobinsonLanding.

SUS was contracted for the condition survey and pier construction repairs consisting of heavy timber cap beam and crossbracing replacement. Working hand-in-hand with a unique mix of marine construction and diving personnel, SUS completed this project within a few days and allowed the terminal to stay active during the work. The team also completed some localized debris removal near the mooring area for safety.

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Specialty Underwater Services (SUS) pile driving crews were called out on multiple occasions from our Baltimore waterfront facility to provide some quick needed work for the boating season. On one trip timber piles were removed and disposed of properly and replaced new piles. In addition, damaged facial timbers and hardware were replaced and new hardware was installed at the floating dock connection. Subsequent trips included the removal and disposal and replacement of timber piles.

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This project consisted of mobilizing our tug and crane barge from our Baltimore facility to support the removal of over 1,500 LF of timber piles and 1,100 LF of steel pipe piles. Our team also dismantled and disposed of 10,000 SF of aging floating dock structures and terminated the utilities at the bulkhead.

Specialty Underwater Services was contracted to provide Pier Rehabilitation. The work consisted of the removal of the existing Timber Structures, Dolphins and Piles along with the  demolition  and  removal  of  the  existing boathouse, light poles and pier handrails. Once  the  demolition  work  was  completed  concrete  repairs  were made  to  the  under-deck of pier, the pier deck itself and the  concrete  curbs.    New  Concrete  curb  was  installed  along  with  structural  steel  repairs. A  new  “D” fender  was  installed  around  the  pier  and  the  sheet  pile  wall  was  extended  for  the  bulkhead and a new concrete cap was poured.