Syndicat Mixte Pour Le Developpement Durable De L'estuaire De La Gironde

What Syndicat Mixte Pour Le Developpement Durable De L'estuaire De La Gironde does

SMIDDEST (Syndicat Mixte pour le Développement Durable de l'Estuaire de la Gironde) is a French public administrative body (syndicat mixte) created around 2002 to serve as the shared working tool of seven member collectivités — the Gironde and Charente-Maritime départements, the Nouvelle-Aquitaine region, Bordeaux Métropole, the Communauté d'Agglomération Royan Atlantique, and the communautés de communes de Haute-Saintonge and de l'Estuaire — on all matters of planning, protection and preservation of the Gironde Estuary. Labelled Établissement Public Territorial de Bassin (EPTB) in 2007 and holder of an approved SAGE since 2013, SMIDDEST is the statutory coordinator of flood prevention, water management, wetland preservation, landscape planning and UNESCO heritage stewardship across ~78 communes covering the largest estuary in Europe.

Its product surface combines regulatory planning instruments with technical decision-support tools. The flagship technical asset is the Référentiel Inondation Gironde (RIG), a 2D hydraulic modelling reference launched in 2006 and now being rebuilt as RIG 2020 global under a €185,000 HT R&D partnership with Cerema on the open-source Telemac2d engine. This sits alongside the SIGESTUAIRE 2.0 public cartographic platform hosted on carto.monterritoire.fr and the operational management of the Phare de Cordouan under an Autorisation d'Occupation Temporaire (AOT) since 2010, with the site inscribed on the UNESCO World Heritage List in July 2021. Programmes include the PAPI Complet Estuaire Gironde (2016-2021, 46 actions across 7 axes, with PAPI 2 under elaboration from January 2026), the Plan paysages de l'embouchure, the CPIER Garonne démarche paysagère (2021-2027), the SAGE revision begun in 2022, and the March 2026 MATCH micropollutant awareness campaign.

SMIDDEST has no commercial revenue: it is funded through member-collectivité contributions and project-specific public grants (État/Fonds Barnier, Fonds Vert, Agence de l'Eau Adour-Garonne, FPRNM, Fondation de France, Cerema). Pricing is non-commercial — costs are disclosed per programme (e.g., €46,965 for 2023 PAPI animation; €15M for Bordeaux Métropole dike reinforcement; €1.51M HT Barzan; €0.7M HT Chenac-Saint-Seurin-d'Uzet). Go-to-market is institutional: services are delivered through direct Comité Syndical governance, a public-facing website, extranet and cartographic portal, and on-the-ground activities (public meetings, school workshops, lighthouse visits). Governance is led by Présidente Pascale Got (signatory of the Cerema convention) and Présidente Françoise de Roffignac (also vice-présidente of CD17).

Name

Syndicat Mixte Pour Le Developpement Durable De L'estuaire De La Gironde

Legal name

Syndicat Mixte pour le Développement Durable de l'Estuaire de la Gironde

Website

https://smiddest.fr

Company type

Private

Founded year

2002

Operating status

Operating

Headcount range

11–50 employees

Short description

SMIDDEST is a French public syndicat mixte (EPTB) coordinating flood prevention, water management, landscape planning and Cordouan lighthouse stewardship across 78 communes of the Gironde Estuary on behalf of seven member collectivités, funded by member contributions and public grants.

Ownership category

akta.pro rank

Product category

Public Flood Risk Management and Water Resource Planning

NAICS

Water Supply and Irrigation Systems (221310)

SIC

Water Supply (4941)

akta.pro primary industry

Water Resources & Watershed Protection (BPAGAGAK)

Keywords

• Flood risk management
• Water resource planning
• Estuarine preservation
• Hydraulic modeling services
• Heritage site management

Headquarters

HQ city

Floirac

HQ country

France

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Technology or R&D, Operations, Infrastructure, Marketing or Sales

Revenue model

1. Member contributions from collectivités: Core funding from its 7+ member collectivités: Conseil départemental de la Gironde, Conseil départemental de la Charente-Maritime, Conseil régional d'Aquitaine-Limousin-Poitou-Charentes, Bordeaux Métropole, Communauté d'Agglomération Royan Atlantique, Communauté de communes de Haute-Saintonge, Communauté de communes de l'Estuaire. Members contribute operating budgets as a 'syndicat mixte'.
2. State and agency grants (Fonds Barnier, Fonds Vert, Agence de l'Eau Adour-Garonne, FPRNM): Public subsidies covering PAPI animation and actions: e.g., 2023 PAPI animation co-financed 40% by Etat (Fonds Barnier), 30% by Agence de l'Eau Adour-Garonne, 10% by Fonds Vert, with 20% self-financing by SMIDDEST. Also 40% state / 20% region / 20% department / 20% agglomeration for Charente-Maritime dike actions.
3. Cordouan lighthouse tourism receipts: SMIDDEST, as gestionnaire of the lighthouse since 2010 via an Autorisation d'Occupation Temporaire, organizes visitor access and coordinates approved carriers from both banks during the April-October tourist season.
4. CPIER Garonne / Plan de paysage programme funding: Funding obtained via two calls for projects won in 2022: the Ministry of Ecological Transition 'Plans de paysage' call and the DREAL Occitanie AMI under the CPIER Garonne 2021-2027, supporting the landscape approach on the estuary.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels7 records

Core offering

SMIDDEST delivers coordinated flood prevention, water resource management, wetland preservation and landscape planning services for the Gironde Estuary on behalf of its member collectivités. It animates the SAGE (Schéma d'Aménagement et de Gestion des Eaux, approved 2013) and the PAPI Estuaire Gironde flood-prevention programme (labelled November 2015), operates the RIG hydraulic modelling reference and the SIGESTUAIRE 2.0 cartographic platform, and manages the UNESCO-listed Phare de Cordouan under an Autorisation d'Occupation Temporaire since 2010.

Product overview

SMIDDEST is a French public syndicat mixte (labelled EPTB since 2007) that operates a platform-plus-modules architecture combining strategic programmes, technical decision-support tools and a heritage site management service for the Gironde Estuary. Its core platform is the GIS-based decision-support system built around the Référentiel Inondation Gironde (RIG) and the public SIGESTUAIRE 2.0 cartographic viewer, on top of which sit regulatory planning instruments — the SAGE Estuaire de la Gironde (approved 2013, under revision since 2022) and the PAPI Estuaire Gironde (2016-2021, with PAPI 2 launched January 2026). Around these, SMIDDEST operates the Gestion du Phare de Cordouan (heritage site since 2010, UNESCO 2021), the Plan paysages de l'embouchure and the CPIER Garonne démarche paysagère, plus member services such as the Extranet SMIDDEST (compte), and public-awareness initiatives including the Campagne MATCH (micropolluants, March 2026) and the Stratégie Estuaire 2014-2020.

Differentiator

Problem solved

Functional benefit

Brands

• Phare de Cordouan (managed site): Iconic French lighthouse whose management was transferred to SMIDDEST by the French State in 2010; the syndicat handles guardianship, public reception, site promotion and cultural projects. Listed as UNESCO World Heritage since July 2021.
• SIG'Estuaire (SIGESTUAIRE 2.0)

Products and services

• PAPI Estuaire Gironde (Programme d'Actions et de Pr\u00e9vention des Inondations) Contractual flood-prevention programme between the French State and local authorities piloted by SMIDDEST, aimed at a global coherent strategy to reduce the vulnerability of human, economic and environmental stakes to flooding on the Gironde Estuary.
• SAGE Estuaire de la Gironde Sch\u00e9ma d'Am\u00e9nagement et de Gestion des Eaux (SAGE) for the Gironde Estuary and associated environments — a regulatory planning instrument covering turbidity maximum (bouchon vaseux), chemical pollution, benthic habitats, navigation, water quality, wetlands, estuarine ecosystems, flood risk and stakeholder organisation.
• R\u00e9f\u00e9rentiel Inondation Gironde (RIG) \u2014 RIG 2020 global 2D hydraulic modelling reference for the Gironde Estuary, initiated in 2006, used as the basis for PAPI scenarios and PPRI revisions. RIG 2020 global is the next-generation, open-source (Telemac2d) model being co-developed with Cerema to cover flood-risk mapping, flood forecasting, crisis management, climate change impact, water quality and ecosystem management.
• SIGESTUAIRE 2.0 (SIG'Estuaire) Interactive cartographic interface (Plateforme SIGESTUAIRE 2.0) hosted on carto.monterritoire.fr, providing public access to the SAGE Estuaire de la Gironde mapping data (perimeter, wetlands, hydraulic data, etc.).
• Gestion du Phare de Cordouan Operational management of the Phare de Cordouan (oldest active lighthouse in France, UNESCO World Heritage since 2021) by SMIDDEST since 2010 via an Autorisation d'Occupation Temporaire, covering guarding, public reception April-October, cultural projects (artistic residencies) and preservation of the rocky foreshore biodiversity.
• Plan paysages de l'embouchure de l'estuaire de la Gironde Landscape plan covering ~220 km², 13 communes and 2 intercommunalities around the mouth of the Gironde Estuary. Includes a landscape study by Pollen Paysage and an archaeo-geographic study by Cédric Lavigne and Catherine Fruchart, focused on the management and enhancement of water landscapes.
• D\u00e9marche paysag\u00e8re CPIER Garonne (Plans de paysage + CPIER) Combined landscape/awareness programme within the CPIER Garonne 2021-2027, aiming to document, share and debate the perception of water landscapes by inhabitants of the estuarine territory, structured around 4 steps (inventory, perception surveys, public mediation, operational actions).
• Campagne MATCH (Micropolluants) Awareness campaign providing practical fact sheets and a partner communication kit to help households and local authorities reduce micropollutant discharges (laundry, deodorant, cigarette butts, antiparasitics).
• Strat\u00e9gie Estuaire 2014-2020 SMIDDEST's strategic framework for the promotion and development of the Gironde Estuary, covering landscape approach, Plan paysages de l'embouchure and the CPIER Garonne axis.
• Extranet SMIDDEST (compte) Restricted-access portal (compte/login) operated via Kiubi, providing member-only access for SMIDDEST's syndicate members and partners.

Quantifiable outcome

• 220 km² of landscapes planned in the Plan paysages de l'embouchure covering 13 communes and 2 intercommunalités
• +4 more outcomes

Named customers7 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

18 partnerships are on record, tiered flagship / strategic, strategic research partnership, study partner, project contractor, founding member and key co-financier, founding member and maître d'ouvrage, founding member and co-financier, founding member, infrastructure vendor, technical operator, web agency, audience measurement tool and email marketing tool.

• Cerema Sud-Ouest (Centre d'études et d'expertise sur les risques, l'environnement, la mobilité et l'aménagement)flagship / strategicStrategic or Co-development Partner · 12 January 2021On 12 January 2021, Cerema Sud-Ouest and SMIDDEST signed an R&D partnership convention for the 2020-2023 period. Together they co-build 'RIG 2020 global', a new open-source hydraulic model based on Telemac2d that updates bathymetric, topographic and dike data. Cost of cooperation: €185,000 HT. Cerema also supports SMIDDEST in resilience workshops on the presqu'île d'Ambès and the Saint-Vincent-de-Paul refuge-school project.
• LIENSs - Laboratoire Littoral, Environnement et Sociétés (CNRS / Université de La Rochelle)strategic research partnershipStrategic or Co-development PartnerCollaboration on the deployment of temporary wave-measurement instruments on the Cordouan foreshore (Xavier Bertin, Baptiste Mengual, Laura Lavaud, Denis Dausse) within a Fondation de France-funded project. Goal: better understand infra-gravity waves and their hydro-sedimentary dynamics during storms, with comparative analysis with the Tagus estuary.
• Pollen Paysage (paysagistes)study partnerImplementation/ SI/ Consulting PartnerConducted the landscape study underpinning the 'Plan paysages de l'embouchure', producing a diagnostic and recommendations on water landscapes of the Gironde Estuary.
• Cédric Lavigne and Catherine Fruchart (archéo-géographes)study partnerImplementation/ SI/ Consulting PartnerConducted an archéo-geographic study characterising the environmental and anthropic dynamics of the Gironde Estuary mouth from the 17th century to the present day, as part of the 'Plan paysages'.
• Egis Eau (bureau d'études)project contractorImplementation/ SI/ Consulting PartnerConducted the three-phase vulnerability diagnostic on 11 historic monuments in flood-prone zones (e.g., Phare de Cordouan, Fort Médoc, Pont de Pierre, Château Plaisance, Château Sainte-Barbe, Château d'Issan), producing recommendations to improve resilience.
• IMSRN (bureau d'études)project contractorImplementation/ SI/ Consulting PartnerCarried out the PAPI action assisting 64 communes outside Bordeaux Métropole in updating their PCS and DICRIM (action 3.1 of the PAPI). 55 PCS analysed, ~25 consultation workshops held April-June 2017, action closed end of October 2017.
• AEI (équipe / bureau d'études)project contractorImplementation/ SI/ Consulting PartnerIn 2018, produced the schéma directeur des zones refuges for the four communes of the presqu'île d'Ambès, identifying Saint-Vincent-de-Paul school as a proximity refuge; in 2019, conducted awareness workshops with teachers and leisure-centre staff and designed pedagogical tools for pupils.
• Bordeaux Métropolefounding member and key co-financierChannel Partner/ Reseller/ DistributorFounding member of the syndicat mixte, co-financier of the PAPI (e.g., 20% of Charente-Maritime dike protection actions) and maître d'ouvrage of major dike reinforcement works (€15 M on a 10 km linear) and PCS harmonisation across metropolitan communes.
• Conseil départemental de la Girondefounding member and key co-financierStrategic or Co-development PartnerFounding member and maître d'ouvrage of PAPI actions (€405,600 budget 2016-2021); member of SPIPA (€1.4 M for dike/hydraulic works 2016-2017). Implements the Plan de Continuité d'Activité (PCA) since November 2018 and conducts vulnerability diagnostics of departmental buildings.
• Conseil départemental de la Charente-Maritimefounding member and maître d'ouvrageStrategic or Co-development PartnerFounding member and maître d'ouvrage of the Barzan (€1,510,000 HT) and Chenac-Saint-Seurin-d'Uzet (€700,000 HT) dike protection projects. Co-financier (20%) of Charente-Maritime flood works.
• Communauté d'Agglomération Royan Atlantiquefounding member and co-financierChannel Partner/ Reseller/ DistributorFounding member of the syndicat mixte; co-financier (20%) of flood protection actions on the Charente-Maritime bank (e.g., Barzan, Chenac-Saint-Seurin-d'Uzet).
• Communauté de communes de Haute-Saintongefounding memberChannel Partner/ Reseller/ DistributorFounding member of the syndicat mixte; co-investor in shared sustainable development actions on the Gironde Estuary.
• Communauté de communes de l'Estuairefounding memberChannel Partner/ Reseller/ DistributorFounding member of the syndicat mixte; co-investor in shared sustainable development actions on the Gironde Estuary.
• OVHinfrastructure vendorTechnology or IntegrationWeb hosting provider for SMIDDEST (data localisation: France). Receives personal data collected via SMIDDEST website forms.
• Kiubitechnical operatorTechnology or IntegrationPlatform provider for the SMIDDEST website (technical operator of the website). Listed as data recipient in the privacy policy.
• Natural-netweb agencyTechnology or IntegrationWeb agency that built and maintains the SMIDDEST website, using its 'Site Internet Qualité' service and the 'Lifeline NGO and Charity Responsive HTML Template' (Webinane/Themeforest). Listed as data recipient.
• Google Analyticsaudience measurement toolTechnology or IntegrationAudience analytics service used on SMIDDEST's website to measure visits, page views and consulted products. Data localisation: worldwide.
• Mailchimpemail marketing toolTechnology or IntegrationNewsletter distribution tool used by SMIDDEST (listed as data recipient in the privacy policy).

Scale indicators8 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Parc Naturel Marin de l'Estuaire de la Gironde et de la Mer des Pertuis: Marine natural park covering the same Gironde Estuary geography as SMIDDEST, with a comparable public mission of preserving biodiversity, coordinating stakeholders and managing cultural-environmental assets of the estuary. Shares territory and partially overlapping mandate (wetlands, coastal preservation).
• EPTB Seine Grands Lacs: French Établissement Public Territorial de Bassin managing flood prevention and water resource governance for the Seine basin upstream of Paris. Directly comparable legal form (EPTB), coordination of member collectivités and basin-scale hydraulic modelling mandate mirrors SMIDDEST's role for the Gironde Estuary.
• EPIDOR (Établissement Public du Bassin de la Dordogne): EPTB for the Dordogne basin operating under the same French public basin-establishment status as SMIDDEST. Comparable scope: coordinating flood prevention, water governance and stakeholder alignment across a single river basin with departmental and regional members.
• Établissement public Loire (EPTB Loire): French EPTB coordinating flood prevention and water management across the Loire basin. Same public basin-establishment legal form, multi-member-collectivité governance, and reliance on State/EU programme funding make it a structural mirror of SMIDDEST, with a larger and more mature portfolio of hydraulic works.

Broad incumbents

• Cerema: National public expert centre for environmental, mobility and risk engineering — SMIDDEST's R&D partner on RIG 2020 global. Comparable because it provides the hydraulic modelling, vulnerability diagnostics and territorial engineering capabilities that SMIDDEST relies on, but at national scale and across multiple basins.
• Agence de l'Eau Adour-Garonne: French State water agency covering the Adour-Garonne basin — the same basin as the Gironde Estuary. It is both a direct funding partner (30% of SMIDDEST's 2023 PAPI animation) and a broader incumbent with wider regulatory and financial powers over the basin, making it the most immediate larger peer.

Others

• Conservatoire du Littoral: National public agency owning and managing fragile coastal and estuarine sites across France. Comparable as a heritage/land stewardship public body with an acquisition-and-management mandate that overlaps SMIDDEST's Cordouan lighthouse and estuary landscape responsibilities.
• BRGM (Bureau de Recherches Géologiques et Minières): French public geological survey that produces subsurface, hydrogeological and flood-related datasets used in basin-scale modelling. Comparable as an upstream technical/data provider feeding SMIDDEST's hydraulic and territorial analyses, though broader in scope and national in footprint.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/smiddest

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries7 records

Funding overview

Funding rounds

Investors

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M&A

Investments

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Frequently asked questions about Syndicat Mixte Pour Le Developpement Durable De L'estuaire De La Gironde