Beneficial Use of Dredged Material for Salt Marsh Restoration at Naval Submarine Base Kings Bay

for Information for Market Research Title: Beneficial Use of Dredged Material (BUDM) – Salt Marsh Restoration at Naval Submarine Base (NSB) Kings Bay, Georgia Introduction The U.S. Army Corps of Engineers, Jacksonville District (SAJ), is issuing this Request for Information (RFI) on behalf of the United States Navy to conduct market research and solicit industry feedback. The Government is seeking information from the dredging industry regarding reliable and efficient means and methods for the beneficial placement of dredged material into the salt marshes surrounding Naval Submarine Base (NSB) Kings Bay.

Background and

Objectives The primary mission at NSB Kings Bay is to ensure the safe and unimpeded navigation of Naval vessels. Current maintenance dredging operations face logistical challenges regarding the capacity of existing Dredged Material Management Areas (DMMAs). The Government’s strategy involves a dual-purpose approach: Shoaling Reduction: Restoration of the surrounding marshes is anticipated to improve local hydrodynamics and reduce shoaling rates within the base. Sustainability: Utilizing dredged material for marsh restoration preserves limited DMMA capacity and ensures long-term coastal resiliency. The Government anticipates this will be a multi-year effort requiring several annual placements to achieve full restoration, followed by recurring maintenance placements to sustain the marsh elevation over time. Technical

Requirements The Government’s goal is the beneficial placement of approximately one million (1,000,000) cubic yards of dredged material annually into the surrounding marshes. The means and methods provided must be: Reliable: Capable of meeting strict operational timelines to ensure Naval vessel transit. Efficient: Able to handle large volumes of material with minimal impact on the existing delicate marsh ecosystem (+6,000 cubic yards per day on average). Sustainable: Adaptable for both initial restoration and long-term maintenance applications. Dredging

Requirements The annual maintenance dredging at NSB Kings Bay requires dredging to depths of 44 to 47 feet in the channel as well as within 15 feet of several sensitive waterfront structures; the tidal change in this area is approximately 6 feet. The beneficial use placement areas will be as much as 6.4 miles from the furthest maintenance dredging location and require transport of varying types of dredged material (silty to sandy) through two port security barriers (see attached map). Firms will be required to operate in a highly dynamic environment which requires unscheduled movements to accommodate Naval vessels as well as satisfy stringent Naval security

requirements. The timeframe for annual maintenance dredging is typically 300 days which includes a secondary dredging option to address areas with historically high shoaling rates. It is recommended that all firms interested in responding to this RFI first review the plans and specifications (including Geotechnical Data Report and environmental restrictions/requirements) for a recent annual maintenance dredging event at NSB Kings Bay (see attached). Information Requested Interested firms are invited to submit a capability statement or technical white paper addressing the following: Means and Methods: Describe specific technologies or methods (e.g., thin-layer placement, spray dredging, hydraulic piping, or innovative containment) suited for high-volume marsh restoration. Equipment Availability: Identify specialized equipment currently in your fleet capable of achieving the one million cubic yard annual target (turbidity curtains will not be allowed due to regulatory restrictions). Production Rates: Provide estimated daily/monthly production rates for the proposed methods in a marsh environment. Monitoring and Precision: Describe how your firm ensures precise placement to achieve desired marsh elevations without smothering existing vegetation. Logistical Constraints: Identify potential challenges (e.g., pumping distances, tide cycles, or environmental windows) and proposed mitigation strategies. Past Experience: Brief summaries of similar BUDM or marsh restoration projects performed by your firm. Design