Site work for a water / sewer project in Burlington, Vermont. Completed plans call for site work for a water / sewer project.

The City of Burlington ("City") Department of Public Works Water Resources Division is seeking proposals from qualified firms for construction services relating to the selective grouting of the portion of the late-1800's era, 5-foot diameter brick sewer (referred to as the "Ravine Sewer" herein) which underlies the currently under construction Post Apartments building and its associated zone of influence. All pre-bid questions are due by August 26, 2025 at 2:00 pm. Contact: Ashley Walenty, PE Water Resource Engineer Water Resources Division Department of Public Works awalenty@burlingtonvt.gov. The City of Burlington ("City") Department of Public Works Water Resources Division is seeking proposals from qualified firms for construction services relating to the selective grouting of the portion of the late-1800's era, 5-foot diameter brick sewer (referred to as the "Ravine Sewer" herein) which underlies the currently under construction Post Apartments building and its associated zone of influence. Qualified firms will possess technical expertise, management and staffing abilities, references, and related prior experience to complete the project described within this Request for Price Quotations("RFPQ"). The Post Apartments project consists of the construction of a new, approximately 45,000 square foot multi-family housing building centered about the footprint of the former VFW building at 176 South Winooski Ave. in Burlington, Vermont. The Ravine Sewer underlies the northwest corner of the proposed new building and is about 25 to 30 feet below current site grades. The Post Apartments project was designed with the understanding that a separate project underway by the City to modernize the sewer system, which included taking this stretch of the Ravine Sewer offline, would be completed in advance of beginning construction on the Post Apartments structure. This would allow for grouting the Ravine sewer between the manholes in Main Street and King Street. As such, the foundation support system that was installed for the Post Apartments project is reliant upon the Ravine Sewer being grouted below the building footprint, and within a 1 Horizontal: 1 Vertical zone of influence of rigid inclusion or aggregate pier ground improvement elements. Since design was completed, delays in the sewer project led to the Post Apartments project going into construction in advance of the Ravine Sewer being taken offline. Furthermore, there is concern with taking offline the portion of the Ravine Sewer that resides west of South Winooski Ave. The result is that a much smaller portion of the Ravine Sewer can be readily grouted, accessing the sewer for grouting via manholes is not expected to be practical, and the in-construction Post Apartments building will limit the locations at which the Ravine Sewer can be accessed for grouting from above. Based on these conditions, grouting the necessary portion of the Ravine Sewer for the foundation support system of the Post Apartments building to be functional will no longer be able to be performed using conventional methods. We expect the successful grouting of the Ravine Sewer within the vicinity of the Post Apartments site will require drilling access and venting ports into the Ravine Sewer from ground surface, constructing bulkheads through the drill casing at each end of the project, and grouting between the bulkheads. We expect this will require working within South Winooski Ave. as well as the adjacent gas station property at the corner of South Winooski Ave. and Main St. During the evaluation process, the City reserves the right, where it may serve the City's best interest, to request additional information or clarifications. The City reserves the exclusive right to select or reject a firm as it deems to be in the City's best interest . The City will award the project to the most advantageous proposal from a responsible and responsive offeror. No minimum amount of work is implied or guaranteed under this Request for Price Quotations. All proposals shall be in full compliance with all applicable requirements of Federal, State and local laws. The City reserves the right to further negotiate the price proposal.