St. Francis Barracks Seawall, Shoreline Erosion Protection, CAP Section 14, St. Johns County, Florida

Project Description: The St. Francis Barracks Seawall project involves the following construction tasks: install a gravel “French” drain system, with periodic weep drains, along much of the back side of the 544-foot coquina block seawall, patch/fill large voids/cracks and repoint mortar joints over the northern 439’ portion of the seawall (the seaward face) utilizing stone mason techniques and a prescriptive coquina mortar mix, fill any soil voids encountered landward of the gravel “French” drain system with a free draining flowable fill material, install a concrete gutter drain between the seawall and the existing 46’ wooden office build, cut 30 inches off the 26’ porch slab (attached to the southern side of the office build) along the seawall in order to continue the concrete gutter drain, install through-wall soil anchors (six to eight anchors) equally spaced about the corner of the seawall, Shotcrete the southernmost 86’ of the seawall (the seaward face), Shotcrete form a reinforced wave-break curb at base of the seawall corner extending for approximately 25(+/-) feet in either directions. Project Challenges: The work area is in a densely populated downtown area with notable volume of tourist traffic, narrow roadways, and non-standard road intersections. The job site has limited points of access and limited opportunities for equipment staging and materials storage areas adjacent to or near the work area. The contractor may not employ construction vehicles (e.g. dump trucks, cranes, backhoes, etc.) or watercrafts (e.g. boats, barges, floating docks, etc.) on the seaward side of the seawall. Construction workers with portable tools/equipment may work during each workday within 15’ of the seaward side of the seawall. The Contractor will be required to apply Shotcrete for approximately 87’ on the seaward face of the seawall. The wall is constructed of cut coquina block. The Contractor will be required to employ stone mason techniques and a prescriptive mortar mix to repoint the mortar joints and patch missing coquina block or physical voids in the seawall. The waterway to the front of the seawall (the Matanzas River) is a tidal river and will limit the amount of dry access during portions of each workday. Excavate, with hand tools, a 48" [(+/-) 6"] deep by 24" wide trench (w/ braced side walls) along most of the length of the 544’ seawall.

Division 31 -	Earthwork, Erosion and Sedimentation Controls.
Division 33 -	Utilities, Storm Drainage Utilities, Ponds and Reservoirs.
Division 35 -	Waterway and Marine Construction, Shoreline Protection, Waterway Construction and Equipment.