Marine and Water Front Construction

Cerrudo Services has extensive experience in marine demolition/salvage and waterfront construction including erosion repair, pipeline construction, dock repairs and new dock installation.

US COAST GUARD STATION MONTEREY FLOATING DOCK REPAIR

  • Completed Gangway
  • Hoisting Gangway
  • Gangway III
  • Client: US Coast Guard
  • Location: Monterey, CA
  • Date: 2016
  • Contract #: HSCG88-15-J-PQQ155
  • Value: $64,623

Project Details

Cerrudo Services provided all labor, materials and equipment to repair the existing floating waterfront dock at Station Monterey.  Repairs were required due to extensive damage caused over time.  The gangway was removed to the platform brow connection and a new welded connection was provided.  Weld repairs were made to the lower ramp connection.  The gangway wheels were replaced to allow pivoting in all directions.  The gangway wheel plate was replaced at the floating dock deck.  Cerrudo repaired the damaged concrete on the deck that had been damaged by the immobilized wheels.  Floating dock access was maintained for Coast Guard use during the repairs.

Cerrudo retained an approved environmental monitor to survey the marine mammal population before work began as well as during performance of the work. A report was provided on the mammal’s population and interaction with the work crews during construction.

US COAST GUARD STATION VALLEJO DOCK ACCESS IMPROVEMENTS

  • Vallejo Dock - Photo 1
  • Vallejo-Dock---Photo-2
  • Client: US Coast Guard
  • Location: Vallejo, CA
  • Date: 2012
  • Contract #: HSCG88-11-J-PQQ096
  • Value: $381,462

Project Details

Cerrudo Services removed and disposed of five timber floating finger docks (approximately five feet wide by 30 feet long) and seven creosote treated timber piles that were within the footprint of the elevated walkway. Four driven steel H piles with steel pile caps were designed to support the elevated walkways and landing.  Fiberglass grating and aluminum gangway were fabricated and installed, including the connection to the existing wooden pier structure.  The walkway includes marine grade light fixtures every 20 feet.  The existing wooden pier section was refurbished by removing the existing wooden decking and supports and replacing them with new treated wood of the same dimensions.  All cross bracing sections and connection hardware were replaced.  The utilities, including the electrical transformer that services the Station’s floating dock from the existing floating access dock to the elevated walkway were improved.

Work was scheduled to minimize interference with the normal operations of the facility. At no time was access to the search and rescue boat impede.  All work that might normally hinder access to the boat was performed while the boat was away from the dock on scheduled training patrols.

                   

US COAST GUARD SECTOR SAN FRANCISCO – WATERFRONT DAMAGE REPAIR

  • SF WATERFRONT DAMAGE REPAIR
  • sSF WATERFRONT DAMAGE
  • SF Waterfront Repair - Photo 3
  • Client: US Coast Guard
  • Location: Yerba Buena Island, San Francisco, CA
  • Date: 2009
  • Contract #: HSCG88-08-J-623227
  • Value: $692,548

Project Details

Cerrudo Services repaired wave protection barriers (WPB) and small boat floating dock assemblies at Yerba Buena Island.  Work was required to repair damage to transition plates and spalled concrete due to intense up and down, side to side, and rolling wave action.  As a sea wall solution was cost prohibitive, an improved connection using special lock nuts on docks A/B, D/E and E/F, and a timber/steel plate waler system for dock F/G was designed.  The special lock nut system minimized the need for frequent maintenance as the lock nuts are not dependent on continuous clamping force and associated tensile force in the bolt as in traditional bolted assemblies.  The majority of damage to the floats had occurred when the nuts loosened and the assembly became detached, allowing the pounding of the adjacent floats upon each other.  The timber/steel plate waler system was an improvement to the through rods which had anchored dock F/G in place.

 

              


US COAST GUARD SAN PEDRO FLOATING DOCK REPAIR

  • Client: US Coast Guard
  • Location: San Pedro, CA
  • Date: 2008
  • Contract #: HSCG88-07-J-623444
  • Value: $134,923

Project Details

Cerrudo Services provided incidental design services and refurbished the North Floating Dock at ISC San Pedro.  The dock, consisting of several floats, was disassembled in a three day period by first removing the steel deck plates and pile guide bracket, cutting the timbers connecting the float sections and securing the floats to be towed to the repair yard.  The concrete floats were refurbished by freshening the spalls to expose new, clean concrete surfaces.  Spalls, cracks and holes were prepared for finish.  Existing cleats and stand pole hardware in good condition were saved for reuse.  A high strength, one component, permanent repair material with bonding agent was troweled into place at repair areas.  The same material was used to plug and patch all existing mounting holes drilled for booster floats below the water line.  New holes were drilled into the concrete float bottoms, not penetrating the foam core.  Interior control joints and construction saw joints on flat surfaces were filled with a two component, rapid curing polyurethane joint filler.  Ramp skid plates were replaced and gangway castor wheels were replaced.  Finally, the floats were brought back to the dock and reinstalled.

                 


US COAST GUARD – GOLDEN GATE FIXED PIER SHORELINE REPAIR

  • GOLDEN GATE FIXED PIER SHORELINE
  • GOLDEN GATE FIXED PIER SHORELINE
  • Client: US Coast Guard
  • Location: Sausalito, CA
  • Date: 2008
  • Contract #: HSCG88-08-J-65N002
  • Value: $63,943

Project Details

Cerrudo Services self-performed the design and construction for this repair project by designing and restoring the load-bearing capacity of the existing fixed pier abutment by filling voids and stabilizing the surrounding structure.  Rip rap was then installed to restore the existing shoreline slope.

BEL MARIN KEYS, NORTH LAGOON DREDGING

  • Dredger
  • Client: California State Coastal Conservancy
  • Location: Novato, CA
  • Date: 2007
  • Contract #: 06-026
  • Value: $1,980,072

Project Details

Cerrudo Services served as prime contractor to dredge approximately 160, 000 cubic yards of sediment for the Bel Marin Keys Service District who represents a water side development on Novato Creek in Novato, California. Cerrudo Services provided a hydraulic cutter head dredge to remove and pump the dredged material to the Hamilton Wetlands Restoration site three miles away. Dredged material was pumped through a 14″ HDPE pipe and deposited at the upland restoration site that was prepared under separate contract.

The primary challenge of this project was the distance that the material was pumped to reach the deposit area and the close working proximity to private property. The distance of pumping was resolved by utilizing a dredge barge with self pumping capacity that eliminated booster pumps. The working proximity of private property issue was resolved by close leashed project management and quality control protocol.

US COAST GUARD HUMBOLDT BAY FLOATING DOCK REPAIR

  • FLOATING DOCK REPAIR
  • Client: US Coast Guard
  • Location: Samoa, CA
  • Date: 2006
  • Contract #: HSCG88-05-J-623280
  • Value: $68,132

Project Details

Cerrudo Services repaired two existing floating docks and gangways at the US Coast Guard Station Humboldt Bay.  The work included removing, disposing and replacing existing pile guide assemblies, gangway casters, gangway connections and boat dock bumper wheels.

The pile guide assemblies were designed to be fabricated and galvanized prior to installation. The guide piles were surveyed before fabrication to determine pile batter and location so that the pile guide assembly would not bind at any time during tidal variations.  After fabrication, the pile guides were installed to ensure a one inch gap between the pile and roller when the pile is centered to the pile guide assembly.

The gangway connections were replaced with one inch stainless steel pivot rods rotating on new fabricated pier mounts.  Each gangway was fitted with new heavy duty swivel casters to allow lateral movement during extreme weather conditions.  Floating dock bumper wheels were removed and replaced with 9-1/2 x 8 inch rubber corner bumpers on all corners of the floating dock.

The project was scheduled to minimize interference with the Coast Guard facilities normal operations.  The two floating docks remained in service during the entire construction period.

                            

 

US COAST GUARD STATION MONTEREY – NOAA FLOATING DOCK INSTALLATION

  • Install-NOAA-Floating-Dock-
  • Client: US Coast Guard
  • Location: Monterey, CA
  • Date: 2006
  • Contract #: HSCG88-06-J-623056
  • Value: $502,162

Project Details

Cerrudo Services installed a new floating dock and gangway at US Coast Guard Station Monterey.  Work included installation of five 18 inch galvanized steel piles, reinforcement of an existing gangway landing and installation of all utility systems.

Each pile and pile bracing was designed, fabricated and galvanized prior to installation.  Because of existing rip rap, the piles were not driven, but attached to the existing pier with two sets of struts and collars.  On site customization for each pile bracing was necessary to secure each pile.  A diver was utilized to secure the piles.

The 100 foot floating concrete dock, also fabricated prior to construction, consisted of two 50 foot sections.  A four foot marine mammal barrier runs along the perimeter of the dock to prevent damage by seal haul-out.  New electric, water, sewer and telecommunications utilities were provided for the dock.

Monterey Bay’s abundance of protected marine mammals required the presence of an on site marine mammal monitor to observe and record pinniped behavior and disturbances.

US COAST GUARD HUMBOLDT BAY – DORADO MOORINGS EROSION REPAIR

  • Client: US Coast Guard
  • Location: Crescent City, CA
  • Date: 2005
  • Contract #: HSCG88-05-J-623218
  • Value: $200,710

Project Details

Cerrudo Services served as the prime contractor to provide all labor, materials and equipment to repair and rehabilitate eroded slope and concrete pad and curbs, and relocate utilities for the existing dock.  Existing utilities were terminated and reconnected to the floating dock including potable water, sewer, telephone, compressed air, lighting and electrical shore power.   Temporary electrical shoretie connection and gangway were provided for the cutter during construction.

The eroded revetment was brought to grade by excavation and fill, then a rip rap slope was installed.  The existing concrete pad and curbs were demolished and new installed to conform to the new rip rap slope.  Finally the gangway platform was extended to the dock from the parking area above the new rip rap.

 

US COAST GUARD AIR STATION SAN FRANCISCO SEAWALL REPAIR

  • SAN FRANCISCO SEAWALL REPAIR
  • Client: US Coast Guard
  • Location: San Francisco, CA
  • Date: 2005
  • Contract #: HSCG88-05-J-623009
  • Value: $647,155

Project Details

Cerrudo Services repaired 800 feet of riprap and approximately 325 feet of concrete curb paving at the US Coast Guard Air Station in South San Francisco.  A seawall protects the Air Station flight line and parking lot from tidal erosion and wind waves.  Rip rap consisted of 1,500 tons of 200 lb class and ¼ ton class stones.   The curb repair required the demolition of a 20” high existing curb and 1,650 SF of asphalt with underlying concrete slab.  Unlike the demolished curb, the new curb and slab contain rebar reinforcement.

Communication and coordination with the Air Station was critical to the success of the project.  Due to the frequency of HH-65 Dolphin rescue helicopter operations in and around the construction site, an ongoing exchange of schedules and work plans from both Cerrudo Services and the Coast Guard were crucial for maintaining construction deadlines and work site safety.  The use of heavy equipment, the dumping, loading, and hauling of materials, and riprap installation all occurred in Coast Guard fueling areas and rescue helicopter flight paths.  The overlapping of construction efforts and helicopter operations required meticulous attention to job site cleanliness to eliminate any potential foreign object damage to the helicopters.