NL Landscaping Open

Construction of a Bioswale with 30-Year Maintenance

Published 17 March 2026

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Location

Den Haag, Netherlands

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Suggested bid value

~EUR 750,000

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Source

tenderned

Description

The municipality of Den Haag is seeking input for a project involving the design, construction, and long-term maintenance of a bioswale. This market consultation precedes a formal tender, aiming to gauge industry interest and refine the project scope. Contractors specializing in landscaping should consider this an opportunity to influence the eventual tender specifications. The work encompasses not only the initial construction but also a significant 30-year maintenance commitment, including groundwater monitoring and water quality control. This suggests a long-term obligation with potential regulatory compliance requirements.

The inclusion of groundwater monitoring and water quality control elevates the project beyond typical landscaping. It implies specialized expertise in hydrology or environmental engineering, either internally or through subcontractors. The 30-year maintenance period represents a substantial long-term responsibility and risk, which will need careful consideration for budgeting and resource allocation. The absence of a published deadline in the current announcement necessitates proactive monitoring for the actual tender launch.

This market consultation, as a preliminary step, indicates the municipality is open to suggestions and feedback from potential bidders. Contractors should evaluate their existing capabilities in bioswale construction, long-term maintenance programs, and environmental monitoring to determine the feasibility and strategic fit of participating in the actual tender when it is released.

Original description

The municipality intends to contract the design, build, and 30-year maintenance of a bioswale, including groundwater monitoring and water quality control. This tender is a market consultation to assess feasibility and optimize the project for future tendering.

Deutsch

Bau einer Bioswale mit 30-jähriger Wartung

Die Gemeinde beabsichtigt, den Entwurf, den Bau und die 30-jährige Wartung einer Bioswale zu vergeben, einschliesslich Grundwasserüberwachung und Wasserqualitätskontrolle. Diese Ausschreibung ist eine Marktkonsultation zur Beurteilung der Machbarkeit und zur Optimierung des Projekts für zukünftige Ausschreibungen.

Français

Construction d'une noue de bioretention avec entretien sur 30 ans

La municipalité a l'intention de contracter la conception, la construction et l'entretien sur 30 ans d'une noue de bioretention, y compris la surveillance des eaux souterraines et le contrôle de la qualité de l'eau. Cet appel d'offres est une consultation du marché pour évaluer la faisabilité et optimiser le projet pour les futurs appels d'offres.