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Framework agreement for maintenance and renovation of IBA systems
Raamovereenkomst voor onderhoud en renovatie van IBA-systemen — original title
Your path to submission
- Deadline: 9 November at 12:00 — 8 days left.
- You submit on TenderNed — not here and not by e-mail. ↗ Submission via TenderNed with an eHerkenning account — issuance for foreign firms can take time; apply early. Sort out account and signature first — not on submission day.
- Offer and evidence in: Dutch.
- Collect your evidence — the eligibility requirements are listed on this page; for many of them the analysis explains how to obtain them.
What the buyer is looking for
Waterschap Scheldestroom intends to conclude a framework agreement with one contractor to carry out preventive and corrective maintenance and renovation work on IBA systems in various municipalities in the province of Zeeland. The work concerns 177 IBA systems, including systems with tanks and helophyte filters, spread over the municipalities of Goes, Hulst, Middelburg, Reimerswaal, Sluis, Terneuzen and Tholen. The assignment includes periodic preventive maintenance, the detection and correction of malfunctions, the provision of a 24-hour fault service, the removal and disposal of sludge, the carrying out of measurements and checks, the recording and reporting of maintenance and malfunction data and the carrying out of renovation work. Renovations can be ordered as an option within the framework agreement and include work on controls, electrical components, piping in and around the tanks…
Show full description
… and civil engineering repairs. The complete replacement of IBA systems is outside the scope of the assignment. The framework agreement shall have an initial duration of two years and may be renewed once for a further period of two years. The intended effective date is 1 January 2027. Awarding takes place on the basis of the best value for money.
Contract
Type of service
Clement What the numbers say about this buyer
- In this sector the buyer awards roughly every 5 months (6 awards, most recently May 2026) — by that rhythm the next award was due around October 2026. The last award went to Van den Heuvel Aannemingsbedrijf B.V.n = 6
- The median procedure drew 5 bids (220 procedures with a bid count); 13% ended with a single bidder. Sector: median 3 bids.n = 220
- 4% of this buyer's awards went to companies that had already won here before (247 awards since 2015, spread over 152 companies). 96% went to new names.n = 247 awards since 2015
- 5% of awards went to companies from abroad (247 awards with a known winner country). Sector average: 2%.n = 247
From this buyer's documented awards; comparison values from the same sector and country. Not a forecast, not legal advice. As of 01/11/2026.
Selection criteria — via the ESPD
The buyer states in the notice that eligibility is proven through the European Single Procurement Document (ESPD); the concrete requirements are in the tender documents. The document analysis below extracts them from there — bid and evidence in Dutch.
Tender documents — direct download
Who has won at this buyer so far
Across all contract types of this buyer — not just this sector. A city buys software and fire engines through the same purchasing office.
| Company | Awards | Period |
|---|---|---|
| Technische Unie B.V. | 2 | 2024–2026 |
| Antea Nederland B.V. | 2 | 2024–2026 |
| Sweco Nederland B.V. | 2 | 2025–2026 |
| Haskoning Nederland B.V. | 2 | 2026 |
| JACOBS DOUWE EGBERTS PRO NL B.V. | 2 | 2024 |
How often this buyer tenders this kind of work
Tactics
When this buyer has awarded in this sector, usually about 3 bids came in. A normal field for this market. (Based on 4 completed awards — not a statement about this procedure.)
This procedure allows 50 days between publication and deadline — typical in this country is 48 (median of 2,911 procedures). A normal window for this market.
The deadline falls on a Monday — your last full working day is the Friday before. Have evidence and guarantees together by Thursday.
Foreign bidders
In the Netherlands · Cleaning, environment & waste, 42 contracts went to foreign companies over the last 3 years (of 2,209 recorded awards) — mostly from Germany, France, Belgium.
Submission language: Dutch.
How to bid
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