Syndicat mixte de gestion de la Seine Normande

What Syndicat mixte de gestion de la Seine Normande does

Syndicat mixte de gestion de la Seine Normande (SMGSN) is a French public administrative establishment (établissement public administratif) created in 2020 and headquartered in Rouen, Normandie. It holds the GEMAPI competence (Gestion des milieux aquatiques et prévention des inondations) for the Seine Normande valley, operating across an intervention perimeter of 79,000 hectares that includes 24,212 hectares of effective wetlands, more than 70 islands, 4 major industrial zones, 2 dams and 2 ports. The organization serves member local authorities and intercommunal structures (EPCIs), coordinating flood prevention and aquatic environment management that would otherwise be fragmented across municipalities. It is led by President Julien Demazure and three Vice-Presidents (Hugo Langlois, Sylvain Bonenfant, Bernard Leroy) and operates with approximately 12 staff, of whom 7 are technical agents running an in-house (régie) works capability with excavators and trucks.

SMGSN's service portfolio comprises three integrated lines: Animation et accompagnement GEMAPI (stakeholder coordination and capacity-building), Etudes GEMAPI (strategic hydraulic, sedimentary and ecological assessments), and Travaux GEMAPI (maintenance and restoration of dike systems and aquatic/wetland environments). The proprietary PPMHA methodology (Plans pluriannuels d'actions et de travaux en faveur des milieux humides et aquatiques) structures multi-year programming across 41 identified restoration sites and 17 lateral connection zones, and the team has also developed a fibrated-concrete bank protection technique that achieves 30% thickness reduction versus classic panels. SMGSN is the designated animating structure of the Natura 2000 site 'Iles et berges de la Seine en Seine-Maritime' (237 ha).

Revenue mechanics are public-sector by design: SMGSN is funded through contributions from member local authorities, supplemented by co-financing from public agencies — most notably the Agence de l'eau Seine-Normandie, which co-signed the first territorial water, climate and biodiversity contract for Seine Normande at 33.135 M€ for 2026-2030, with SMGSN acting as both animator and project owner across 17 actions (3.095 M€ HT of works in its own capacity). Go-to-market is institutional rather than commercial: services are delivered through the comité syndical, bureau, and orientation committee governance structure. Strategic partnerships with GIP Seine-Aval (scientific research), Voies navigables de France (navigable waterways), CEREMA, and SETEC HYDRATEC extend SMGSN's technical and institutional reach.

Name

Syndicat mixte de gestion de la Seine Normande

Legal name

SM DE GESTION DE LA SEINE NORMANDE

Website

https://syndicat-seine-normande.fr

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

SMGSN is a French public administrative establishment holding the GEMAPI competence for aquatic environment management and flood prevention across 79,000 ha of the Seine Normande valley, delivering coordination, strategic studies, and régie dike works for member local authorities.

Ownership category

akta.pro rank

Headquarters

HQ city

Rouen

HQ country

France

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure

Revenue model

1. Public funding and membership contributions: As a public administrative establishment, SMGSN is funded through contributions from member local authorities and potentially government subsidies for GEMAPI activities.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

The Syndicat mixte de gestion de la Seine Normande is a French public administrative establishment (syndicat mixte) that organizes governance and animates a unified strategy for aquatic environment management and flood prevention (GEMAPI - Gestion des Milieux Aquatiques et Prévention des Inondations) across the Seine Normande valley. It conducts strategic studies, knowledge-improvement missions, and performs maintenance and restoration works on dikes, watercourses, and wetland environments for its member local authorities.

Product overview

The SMGSN offers a unified portfolio of public services focused on aquatic environment management and flood prevention (GEMAPI) in the Seine Normande valley. The portfolio consists of three complementary service offerings: (1) Animation et accompagnement GEMAPI for stakeholder coordination, (2) Etudes GEMAPI for strategic studies and assessments, and (3) Travaux GEMAPI for maintenance and restoration works on dikes and aquatic environments. Additionally, the PPMHA serves as a strategic planning tool that integrates with these services to program multi-year restoration actions across wetlands and aquatic habitats.

Differentiator

Problem solved

Functional benefit

Products and services

• Animation et accompagnement GEMAPI Coordinated governance and animation service for member local authorities exercising the GEMAPI public competence, providing strategic coordination, technical support, and unified flood-prevention and aquatic-environment management across the Seine Normande valley.
• Études stratégiques GEMAPI Strategic and technical study services covering hydraulic risk assessment, dike diagnostics, and flood-prevention planning aimed at member local authorities and partner institutions.
• Travaux GEMAPI (dikes, watercourses, wetlands) Maintenance and restoration works on dikes, watercourses, and aquatic/wetland environments executed in-house by the syndicate's technical team of seven agents, including fibrated concrete dike repairs.
• Plan Pluriannuel d'Actions et de Travaux en faveur des Milieux Humides et Aquatiques (PPMHA) Multi-year programming instrument dedicated to actions and works in favour of wetland and aquatic environments, structuring the syndicate's operational planning under the GEMAPI scope.

Quantifiable outcome

• 24,212 ha of effective wetlands managed
• +2 more outcomes

Named customers3 records

Segments2 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Seven partnerships are on record, tiered core and supporting.

• GIP Seine-AvalcoreStrategic or Co-development Partner · 19 June 2026SMGSN became the 12th member of GIP Seine-Aval on June 19, 2026. This partnership strengthens the dialogue between science and public action by enabling exchange of field experience and mobilization of latest knowledge for sustainable management of the Seine Normande. GIP Seine-Aval has been federating researchers, local authorities, public institutions and institutional actors for over twenty years to acquire, share and valorize knowledge on the functioning of the river and its estuary.
• Voies navigables de France (VNF)coreStrategic or Co-development Partner · 26 January 2026Signature of a convention for temporary use of the public fluvial domain, establishing the framework for SMGSN's activities on the navigable waterway managed by VNF.
• Association 'Mission 1 000 tonnes'supportingStrategic or Co-development PartnerSMGSN financially supports the 'Sequana Incognita' artistic, scientific and citizen project documenting the aquatic biodiversity of the Seine estuary through underwater exploration. In return, SMGSN can use created communication supports and benefit from the itinerant exhibition for public awareness on aquatic environment fragility.
• CNFPT NormandiesupportingStrategic or Co-development PartnerPartnership with CNFPT Normandie for organizing a joint exchange day on territorial insurability, bringing together over 70 participants with 12 speakers to discuss risk management for local authorities.
• CEREMAsupportingStrategic or Co-development PartnerSMGSN participated in a CEREMA-organized territorial technical conference on natural risks and climate change in the Hauts-de-France region, presenting the Seine Normande flood risk management strategy in collaboration with BE SETEC HYDRATEC.
• Agence de l'eau Seine-NormandiecoreStrategic or Co-development PartnerMajor funding and technical partnership. The Agence de l'eau Seine-Normandie co-signed the first territory water, climate and biodiversity contract for Seine Normande (33.135 M€ for 2026-2030) and provides priority financing for actions within the contract. SMGSN is both animator and project owner for 17 actions under this contract.
• SETEC HYDRATECsupportingImplementation/ SI/ Consulting PartnerTechnical consulting partner providing support to SMGSN for presenting the flood risk management strategy at conferences and technical events.

Scale indicators10 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Agence de l'eau Seine-Normandie: French basin water agency covering the entire Seine-Normandie hydrographic district. Functions as SMGSN's primary funder and co-signatory of the 2026-2030 contract, but also a peer in administering water policy, funding allocation, and program governance across the same geography.
• Voies navigables de France (VNF): National public operator managing the navigable waterway network. Signed a convention with SMGSN for use of the public fluvial domain; comparable as a large-scale French public body managing fluvial infrastructure on the Seine axis.
• Office Français de la Biodiversité (OFB): National public body with police/regulatory powers on water, biodiversity, and hunting/fishing. Overlaps with SMGSN's Natura 2000 animation and aquatic environment remit at a national scale, and provides technical reference frameworks used by SMGSN.

Direct peers

• EPTB Loire: EPTB for the Loire basin — analogous structural model (public territorial basin establishment), same GEMAPI/water management mission, but on a different major French watershed. Useful structural benchmark.
• EPTB Adour: EPTB for the Adour basin in southwest France. Same public-establishment governance model and same integrated water management + flood prevention mission as SMGSN, on a different watershed. Useful structural and operational benchmark.
• EPTB Seine Grands Lacs: Public territorial basin establishment (EPTB) responsible for water resource management and flood prevention on the upstream Seine (lakes/reservoirs). Direct structural peer to SMGSN: same public-law establishment model, same GEMAPI-adjacent mission, complementary geographic footprint within the same Seine basin.

Others

• CEREMA: French public expert center for territorial risks, environment, and infrastructure. Partner of SMGSN on technical conferences (flood risk, climate change) and a comparable public-sector technical authority operating in adjacent domains.

Regional players

• GIP Seine-Aval: Scientific public interest group federating 20+ years of research on the Seine estuary, of which SMGSN became the 12th member in June 2026. Peer in that it operates on the same Seine Normande territory with overlapping scientific/management interests, though primarily research-focused rather than operational.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Customer concentration

• LinkedInlinkedin.com/company/syndicat-mixte-de-gestion-de-la-seine-normande

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Funding overview

Funding rounds

Investors

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M&A

Investments

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