Industry Outreach Event - GUAJATACA DAM Permanent Repair Project TWO DAY EVENT, JULY 28 - 29, 2026 DESCRIPTION : The US Army Corps of Engineers, Latin America & Caribbean District, is hosting an Outreach Event for the Guajataca Dam Permanent Repair Project, Puerto Rico. This is not a solicitation for proposals, and no contract shall be awarded from this notice. PROJECT SCOPE: This event will discuss TWO separate potential contract actions. The primary purpose is to solicit feedback from the construction industry, specifically targeting contractors with expertise in deep soil mixing (DSM), deep mixing methods (DMM), and other innovative soil improvement techniques for seismic remediation of a dam with a very soft puddle clay core. Guajataca Dam Early Work Effort (Potential Contract 1) : This scope of work includes but is not limited to utility (electrical, telecommunications, water and sewer) relocations, administrative office building demolition and relocation, traffic report and detour route, left abutment water supply siphon system and all incidental related work. All work affecting public roads, restricting public traffic, and involving utility relocations shall comply with Puerto Rico Highway and Transportation Authority's Standard Specifications. Project Magnitude: For informational and bonding purposes, the estimated magnitude of this construction project is between $20M and $50M. Guajataca Dam Permanent Repair Project (Potential Contract 2) : The scope of work for Guajataca Dam Permanent Repair Project includes repair construction of several major features to address significant risks relating to: Stoping of embankment material into karst and joint features in the right and left abutments, transverse cracking of the dam due to seismic loading, seismic deformation and cyclic softening of the puddle core leading to crest lowering and overtopping, concentrated leak erosion (CLE) through transverse cracks across the embankment caused by landslide movement, cracking and scour of the grouted riprap chute, and overtopping of the right side of the spillway causing embankment scour and stability failure. USACE is specifically seeking to engage with soil improvement and deep soil mixing contractors to address key project challenges, which include: Installation of vertical cutoff walls to address karst voids and a core stabilization wall to address embankment seismic instability. This includes installation through the dam's very soft, hydraulically sluiced clay puddle core. Methodologies for working near and tying into existing concrete structures, such as a 1920's era tunnel at the right abutment and a concrete key wall beneath the dam's puddle core. Geometric limitations and constructability of deep mixing methods for creating a positive cutoff in difficult geologic conditions (i.e. karst). Logistical and equipment challenges associated with constructing a cutoff wall on the dam crest. Integration of large filter berms or stabilization buttresses o…