Foul-water piping construction work – Project 23.558/1 & STK3010 - Stekene, Optimalisatie verbindingsriolering Hellestraat 2026 Tender

Aquafin NV

About this tender

Aquafin NV, a Flemish utility, is procuring foul-water sewer construction works under Project 23.558/1 & STK3010 in Stekene, covering the optimisation of the Hellestraat connecting sewer. The scope is a combined package of civil, sewer, pumping and road works. Preparatory work includes demolition of existing pavements and sewers, with connections, and construction of semi-separate sewerage with house connections and gully inlets. Pipe quantities are: DI 250 (763 m), DI 300 (366 m), DI 315 (12 m), DI 400 (1,801 m), DI 500 (430 m), DI 600 (1,261 m), DI 700 (513 m) and DI 800 (45 m). The package also includes polyethylene pressure sewer pipes (DU 63, 14 m; DU 75, 242 m) and a polyethylene rising main (DU 160, 382 m). Ancillary structures include construction of pumping station PS1, pressure-sewer pump units, overflows and throttling structures (some to be prefabricated), and modifications to existing overflow structures. Watercourse works and the construction of wadis with plastic grass plates are also included, along with the installation of 4,028 m of U-channels with infiltration openings. Trench dewatering is required, with discharge of pumped water outside the project zone into public ditch OST045 (Sperrestraat to Kemelstraat section), treatment after sampling and analysis where necessary, provision of water during dry periods, and probe-controlled pumping. Road and public-space works include concrete plateaus, a printed-concrete central reservation, several KWS carriageways (two- and three-layer, one on a steel mesh crack-arresting layer), block-paved roads and parking bays, grass-concrete side strips and driveways, gutters, kerbs and pavements, red-concrete cycle paths, paving with specific laying patterns, tactile paving, landscaping and street furniture, resin-based road markings, signage, and reinstatement of various pavements. The works also cover safety and health coordination under the Belgian temporary and mobile sites decree, and an archaeological investigation. The duration is not stated on the page.

Key requirements

• ✓Excavation and construction of semi-separate sewers (DI 250 to DI 800, about 5.3 km) with house connections and gullies
• ✓Construction of pumping station PS1, pressure sewer networks, overflow and throttle structures, and wadis with plastic grass plates
• ✓Dewatering of trenches, including discharge to the OST045 watercourse, with water treatment and sampling where required

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Relevant sectors

About this sector

Water funding covers supply, sanitation, wastewater treatment, water efficiency, catchment management and flood risk. A large share is public procurement for infrastructure and services, alongside grants for innovation and access in underserved areas. Bidders and applicants are typically assessed on technical capacity, operating experience and community impact.