Renovation of the weir at the Spała water reservoir on the Gać River

Summary

The tender concerns a design-and-build renovation of the weir at the Spała water reservoir on the Gać River. The works include securing the site, removing and reinstalling wooden barriers, installing sheet-pile walls, temporary dewatering and manual excavation, cleaning and repairing wing walls, surface protection, bentonite matting, geotextile protection, drainage, backfilling and compaction, removal of excavated material, and grassing and maintenance of slopes. The contractor must also prepare the multidisciplinary design documentation, obtain any required permits and approvals, provide surveying services, complete the as-built documentation, and arrange handover for use. The contract period is up to 90 days from signing and may not extend beyond 31 December 2026. The award criteria are price (60%) and warranty period (40%); the basic warranty is 5 years and may be extended to a maximum of 7 years. No bid guarantee is required, but the successful bidder must provide a performance security equal to 5% of the gross tender price. Bids must be submitted electronically by 18 September 2026 at 11:00.