Idea Transcript
NARRATIVE REPORT OF CONSTRUCTION ACTIVITIES Contract No. W91278-10-C-0022, Construct the Bay Saint Louis Seawall 19 April 2012 Award of the contract as a “Performance-Price Trade-Off Best Value” proposal was made 29 January 2010 to Hemphill-Key, LLC Joint Venture for the amount of $17,095,000. A protest of award was filed delaying the issuance of the Notice to Proceed until 22 September 2010. The original contract duration was 540 calendar days resulting in a completion date of March 15, 2012. Contract modifications increased contract time 124 calendar days to a total of 664 calendar days revising the completion date to July 17, 2012. The pre construction conference was held 29 September 2010. Work began 8 November 2010 with installation of the safety signs and fence. Clearing and grubbing began on 17 November 2010. The project is for construction of approximately 5,720 feet of stepped, reinforced concrete seawall. The majority of the seawall consists of a vinyl sheet pile cut-off wall, driven an average of 15 feet into the ground with 1.5 feet embedded in the lower concrete seawall footing and 1005 12”x12”x30’ long reinforced concrete foundation piles driven approximately 29 feet into the ground with 1.0 foot embedded into the concrete structure. The foundation piles are driven in one or two rows depending on the total height of the seawall. Other features of the construction included approximately 593 feet of concrete tee wall capping a vinyl sheet pile bulkhead driven 15’ into the ground with 1.5 feet embedment in the concrete, 240 L.F. of concrete cap wall on the vinyl sheet pile bulkhead driven 15 feet into the ground with 0.50 feet of embedment in the concrete and 6,005 feet of scour pad and trench drain behind the seawall for added protection of the structure. A total of 2,415 sheet piles were required for the project. Earthwork for the project required 162,000 cubic yards of select fill material for the seawall and 60,000 cubic yards of sand to replenish the beaches. The project also included disassembly and reconstruction of a portion of an existing pier; installing new storm drainage with related piping, manholes and outfalls, placing riprap with filter fabric and clearing the site for construction. Galvanized pipe rail originally planned to be placed on the transition monoliths was relocated to the divider walls at the elevation changes. Work added by contract modification includes a cable rail system installed along the top of the seawall from station 0+60 thru 56+00, drainage adjustments to accommodate a local harbor project, additional riprap to provide seawall protection at the tide line and solid sod utilized in lieu of normal grassing. There was also a 41” diameter live oak tree that required removal. Mitigation included salvaging, restanding, decorative carving and planting of 8 smaller live oak trees. Complexities during construction of the project include the following. • •
•
•
•
Stepped design of the seawall: the contractor utilized forms made for concrete stadium seating in an innovative way to pour the seawall. Confined work area: the proximity of South Beach Boulevard to the bay restricted the available construction area to a narrow strip of land, limiting the use of heavy construction equipment including cranes, dozers, excavators, fork lifts, end loaders, man lifts, concrete trucks, haul trucks, off road haul trucks and pile driving equipment creating a dangerous, hazardous work environment. The public: the beach has historically been used for recreational activities. Access during construction was restricted. The contractor used safety fence and signs along the perimeter of the beach to limit access. When citizens were observed in the work zone, contractor’s supervisory personnel respectfully asked them to leave due to construction safety hazards. Private land owners: A significant portion of the land area is privately owned. The COE acquired easements across private land but many of the owners were concerned about the work on or near their property. As with the general public, when landowners were observed in the work zone, contractor’s supervisory personnel respectfully asked them to leave due to construction safety hazards. Bay Saint Louis Harbor: About mid way through the seawall construction, the city of Bay St. Louis, through an agreement with the COE and with the cooperation of the seawall contractor, was allowed
NARRATIVE REPORT OF CONSTRUCTION ACTIVITIES Contract No. W91278-10-C-0022
19 April 2012 Page 2 of 2
to let to contract and begin construction of an access road and bridge to a future harbor. This was done over a completed section of the seawall. Even though this work was under a separate contract, safety hazards and complications were introduced to the seawall project. All project personnel were advised of the additional hazards and complications and of the associated safety requirements. A summary of contract modifications is listed below. MOD DESCRIPTION A00001 Provide Office Site Trailer for COE A00002 Increased Costs for Reinforcing Steel A00003 Piling Obstructions A00004 Compensation for Extra Length Piling A00005 Fiber Optics Conflict & Protection A00006 New Handrails A00007 New Guard Cables A00008 Drainage Changes A00009 Pressure Relief Drainage A00010 Change in ACO and Alt ACO A00011 Tree Removal/New Trees/Tree Sculpture A00012 Delete First 60 Feet of Seawall A00013 Electrical Changes at BOP A00014 Solid Sod A00015 Comprehensive Riprap Changes A00016 Bronze Plaque and Additional Drainage TOTAL CONTRACT MODIFICATIONS
AMOUNT $43,985.00 $266,671.00 $29,755.00 $4,345.00 $39,625.00 $8,181.25 $353,159.33 $85,756.45 $32,881.47 $0.00 $55,685.90 -$44,014.92 $15,345.00 $142,307.00 $331,015.97 $25,145.00 $1,389,843.45
TIME 0 0 0 0 0 56 cal day 0 8 cal day 0 0 0 0 30 cal days 30 cal day 0 124 cal days
DATE ISSUED 18 Jul 2011 26 Aug 2011 8 Sep 2011 11 Jan 2012 11 Jan 2012 12 Jan 2012 7 Feb 2012 18 Jan 2012 18 Jan 2012 3 Mar 2012 5 Mar 2012 24 Feb 2012 5 Mar 2012 14 Mar 2012 16 Mar 2012 19 Mar 2012
The work was performed with diligence and efficiency. Equipment, including cranes, pile drivers, excavators, bulldozers, backhoes and water trucks, was inspected and well maintained. Quality Control activities were documented throughout the life of the contract. Safety on the project was a priority of the Contractor. “Tool box” safety meetings were held on Monday mornings and as needed when new work was started. There were no lost time accidents. The Contractor placed 2nd in the District Celebrate Safety program for the first quarter of FY 2012 and has been re-nominated for the second quarter awards program. Operators and support labor were capable, experienced and familiar with the equipment and work required to complete the project. Supervisory personnel were also capable and experienced and continually planning ahead. The equipment was properly sized for the work. These factors and the pro active attitude of the Contractor’s work force contributed to excellent workmanship for the project. The work performed by the Contractor was high quality and in accordance with the plans and specifications. Extra efforts were made to insure that the project was constructed correctly and efficiently. The contract was completed within the contract time and in accordance with the contract plans and specification. Lessons learned during construction of the project include the following. • Item 1: It was discovered during constructions that large underground pile structures existed for the old railroad tressle. Removal was required to facilitate driving of vinyl sheetpiling. Extra care should be taken on future project to do extra soil borings in the vicinity of old structures. • Item 2: During construction, several areas were encountered where the standard length of 35 ft for piles was not sufficient. In the future extra care should be taken to study the soil boring and to require test piles in questionable areas. • Item 3. After award it was discovered that the handrails were not sufficient for public safety. Additional handrails and guard rails were added to the project to protect the public. Recommend that on future projects, the District Safety Office be involved to give guidance on public safety.