HomeMy WebLinkAboutExplanationOn October 3, 2011, four bids were received and opened for the City of National City
Concrete Improvement Project, Specification 11-06. The lowest responsive bidder was
Black Rock Construction Company with a proposed bid amount of $89,797.50. There
was a typographical error on the bid documents that listed the units bid for ADA
pedestrian ramps as "SF" (per square foot) instead of "EA" (each). The bidding
contractors were aware of this but had to bid the line item for the project as presented.
Prices received for the "square foot price" are consistent with the industry for a square
foot price of ADA pedestrian ramp. The apparent low bidder, Black Rock Construction
Company's bid for this line item is $20.00 per square foot. An expected bid price for
"each" pedestrian ramp would be between $1,500 and $2,000. The City wished to
install 32 pedestrian ramps instead of 24 square feet of pedestrian ramp. Due to the
excellent low bid prices the City would like to increase the ADA pedestrian ramp square
footage to add 2,800 square feet at the contractor's price of $20.00 per square foot for
an additional cost of $56,000. This will construct an estimated 32 ADA pedestrian
ramps.
The Contractor and the City agree to add 2,800 square feet to the square foot units of
line item #2,"Remove and Replace Pedestrian Ramps per G-28, G-29, or G-31 with
Truncated Domes (G-30)", of the San Diego Regional Standard Drawings and that the
Contractor will install these ramps per the contract documents. The Contractor and City
agree that the Contractor shall be paid for all additional square footage in excess of the
original bid amount of 24 square feet by up to an additional 2,800 square feet at the
original bid cost of $20.00 per square foot and that all costs and requirements of the
original bid shall apply and there shall be no other additional costs or deductions.
This Change Order requires Council approval before it can become part of the contract.
The bid opening information sheet and the cost proposal worksheet for the three lowest
bidders are attached for your information.
Black Rock Construction Company has satisfactorily performed this type of work in the
past for the City and therefore is found to be qualified for such construction
improvements.
Staff reviewed bid documents and recommends that Council award the contract to
Black Rock Construction Company in the not to exceed amount of $145,797.50 that
includes Change Order 1 in the amount of $56,000 and authorize a 10% contingency in
the amount of $14,579 for any unforeseen changes to the project.