Site work for a water / sewer project in Madeira Beach, Florida. Completed plans call for site work for a water / sewer project.

The City of Madeira Beach, Florida ("City") is requesting Proposals from Florida certified, licensed and otherwise qualified Contractors ("CONTRACTOR"), one of which may be selected by the City to enter into a Contract for the construction of a project known as the "RFP No. 2024-03 City Owned Seawall Replacement and Repairs" on City-owned property located at 503 150th Ave., 424 150th Ave., 14109 N Bayshore and the street end at 142nd and N Bayshore in Madeira Beach, Pinellas County, Florida. The subject site is located within the City of Madeira Beach. See attached plans for full specs. The Marina and 14109 N Bayshore will need to be demoed and rebuilt per the attached Approved Permit Drawlings and Permit Conditions and the seawalls located at 424 150th and 142nd and N Bayshore will need to be repaired per the attached inspection reports. Permits will be acquired through the City of Madeira Beach. The right is reserved by the City of Madeira Beach, Florida to reject any or all bids to waive any technical defects, and to accept any bid which the bidding authority believes to be in the best interest of the city. This request for bids and all bids submitted are subject to the city ordinances, state statutes and federal law." per City Code Sec. 2-184. Existing Conditions/Construction o 40.3 LF +/- of seawall o Original Cast-In-Place concrete cap (12" high x 16" wide) o Original Pre-cast concrete panels o 4 ft wide x 8+- ft long slabs o Seawall exposed height from the top of the cap to the berm (mudline) o 48 inches / approximately 4 ft o Stormwater RCP (36" diameter) is located at approximately 3' from the right (southeast) end of the property at 18" out from the wall with invert 42". o Mangroves were observed from approximately 15' to 26.5' starting from the right (southeast) end of the property out 7' from the wall. o Some riprap was observed at the toe of the wall. o Retaining wall runs along the left (northwest) property line. Seawall Cap Condition: o Longitudinal cracking was observed in the face and top of the seawall cap throughout the length of the subject property. o Longitudinal cracking in the cap indicates the rebars inside the concrete are starting to rust from salt intrusion. The rusting causes the rebars to expand and thus crack the concrete. o Extensive spalling of the of the cap was observed with exposed rebar. Seawall Slab Condition: o Majority of slab joints were disjointed indicating movement of the wall. Slab joints. o Slab joints were grouted to the mudline. o No wellpoint drains were observed to relieve hydrostatic pressure or aid in removing water from behind the wall. o Extensive sediment loss was observed behind the wall. Adjacent Properties: o Right (southeast) neighbor: o Contains a poured in place seawall at 4" above the subject property. o Left (northwest) neighbor: o Contains a replaced vinyl sheet wall with a 12"x24" concrete cap at 12" above the subject property. Scope of Work This project includes installation of approximately 40 LF of vinyl sheet pile wall at the property at 141st N Bayshore Drive, Madeira Beach, FL 33708. The seawall is to remain at the existing seawall elevation with the exposed height from the top of the wall to the berm at approximately 4.0 ft. The existing concrete wall remains in place. Provide compacted sandy backfill to the top of the cap as needed. A floating turbidity barrier will be required in front of any work area. Question Deadline 07/16/2024 Questions must be submitted by Brian Crabtree Marina Manager 503 150th Avenue Madeira Beach, Florida 33708 (727) 399-2631 or (727) 409-0584 bcrabtree@madeirabeachfl.gov Marina Replacement: The 360' of seawall will need to be vinyl sheet piled. Seawall cap, tiebacks and dead men will need to be replaced. All dock, gangway and finger pier entrances will need the necessary deck boards carefully removed, stowed safely and put back to match the original docks/piers. Any utilities that need to be moved or disconnected/reconnected will be identified by the contractor. Utilities will be disconnected/reconnected by the awarded contractor. See attached Design Plans. 424 150 th Ave. Repair: The Seawall is approximately 627 LF case in place concrete with precast panels and the seawall exposed height is 58 to 83 inches. This seawall has horizontal, vertical, and diagonal cracking on several slabs with some appearing to be pushed out. There is a thin layer of rip rap at the toe of the wall in areas and is not providing structural support. The wall has no well point drains causing sediment loss behind the wall. Sediment is also being lost through open slab joins and expansion joints in the cap. The loss of sediment has caused hallow points beneath the sidewalk area which will include the correction of the elevation on the sidewalk or a full replacement. See attached inspection report and bid according to the seawall recommendations from Ruben Clarson Consulting. 142 nd Ave & N Bayshore Street End Repair: The current seawall is approximately 40 LF replaced cast in place concrete with original precast concrete 4 ft wide by 8ft slabs. The seawall exposed height from the top of the cap to the berm 45 to 72 inches / approximately 3.75 to 6ft. There is some longitudinal cracking in the cap indicating the rebar is rusting inside the concrete from salt instruction. There are slab joints open causing extensive sediment loss behind the wall. There are no well points observed to relieve hydrostatic pressure or aid in removing water from behind the wall. See attached inspection report and bid according to the seawall recommendations from Ruben Clarson Consulting. 14109 N Bayshore Replacement: The current seawall is approximately 40.3 LF original cast in place concrete cap with precast concrete panels 4 Ft wide by 8 Ft long slabs. The exposed seawall height from the top of the cap to the berm is approximately 4 Ft with a 36" RCP stormwater pipe sticking approximately 18" out from the wall invert 42". There is some riprap at the toe of the wall and a retaining wall to the left of the property. See attached permit drawings and seawall recommendations in the inspection report from Ruben Clarson Consulting for the full replacement of the seawall.