Seine Grands Lacs

What Seine Grands Lacs does

Seine Grands Lacs is a French public territorial basin organization (Établissement Public Territorial de Bassin, EPTB), established in 1969 and headquartered in Paris, with an official mandate from the State to manage water resources across the Seine basin. Its core function is to operate four large lake reservoirs used for flood prevention, low-water (étiage) support, and environmental protection of the Seine river system. The organization serves member territorial authorities—departments, municipalities, intercommunalities, and the Métropole du Grand Paris (which joined in December 2020)—acting as a coordinating public actor rather than a commercial enterprise.

Its core "products" are operational and infrastructural rather than market-priced: the four lake reservoirs with their dams, spillways, and water-level control systems; the La Seine Bassée pilot project, which extends the operational toolkit beyond the historic reservoirs; the GéoSeineGrandsLacs GIS platform and COTECO zoning tool, used to support member-territory planning; the EPISEINE public-awareness program; six PAPI (Programmes d'Actions de Prévention des Inondations) institutionalizing flood-prevention planning; and a monthly hydrological bulletin (most recent May 2026) providing ongoing basin monitoring. Underlying technology is centered on hydraulic infrastructure and GIS-based environmental data rather than software platforms.

The business model is a public-fee structure: Seine Grands Lacs is funded primarily through the redevance, a statutory contribution paid by member territories and water users in the Seine basin, with governance exercised through elected representatives (President Patrick Ollier, re-elected 2024). There is no commercial pricing model or external equity funding; recent strategic activity has centered on expanding membership (Métropole du Grand Paris), renovating dam infrastructure (La Morge, Beaumont, Chavaudon), and broadening the operational perimeter via La Seine Bassée and PAPI programs.

Name

Seine Grands Lacs

Legal name

Établissement Public Territorial de Bassin Seine Grands Lacs

Website

https://seinegrandslacs.fr

Company type

Private

Founded year

1969

Operating status

Operating

Short description

Seine Grands Lacs is a French public EPTB managing four Seine-basin lake reservoirs for flood prevention, low-water support, and environmental protection, funded by statutory redevance contributions from member territorial authorities.

Ownership category

akta.pro rank

Product category

Water Resource Management

NAICS

Water Supply and Irrigation Systems (22131), Administration of Environmental Quality Programs (9241), Administration of Conservation Programs (92412)

SIC

Water Supply (4941)

akta.pro primary industry

Water Resources Administration (Watersheds, Rivers, Groundwater) (BPAIAMAE)

akta.pro secondary industries

Hydro & Geothermal Reservoir/Wellfield Operations (Waterways, Dams, Wells, Brine Handling) (EUAMAGAI), Water Storage & Conveyance Structures (Tanks, Reservoirs, Canals, Ponds) (AFAAACAH), Hydro BOP Civil & Water Conveyance (Dams, Spillways, Penstocks, Canals) (EUAMAFAG)

Keywords

• Flood prevention services
• Water resource management
• Reservoir operations
• Hydrological monitoring
• Basin governance

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Infrastructure, Operations, Personnel, Technology or R&D, Others

Revenue model

1. Redevance (Water Fees): Public funding through water fees (redevance) collected from territories and water users within the Seine basin, used to fund reservoir operations, maintenance, and flood prevention infrastructure.
2. Public Budget Contributions: Contributions from member territories and public authorities (departments, municipalities, metropolises) that participate in the EPTB governance structure to fund shared water management objectives.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels8 records

Core offering

Seine Grands Lacs is a public territorial basin institution (EPTB) that manages four lake-reservoirs (Orient, Amance-Temple, Der, Pannecière) across the Seine basin to prevent flooding, support river flow during low-water periods, and protect aquatic ecosystems. It coordinates basin-wide water management through PAPI flood-prevention programs, the COTECO low-flow monitoring committee, the GéoSeineGrandsLacs GIS platform, the EPISEINE awareness program, and the La Seine Bassée pilot project, serving member territories, public authorities, and at-risk populations.

Product overview

Seine Grands Lacs (EPTB Seine Grands Lacs) is a public territorial basin establishment operating a portfolio of four lake-reservoirs (Lac-du-Der, Lac-d'Orient, Lac-Amance-Temple, and Lac-de-Panneciere) for flood prevention, drought support, and environmental protection across the Seine basin. The organization provides related services including the EPISEINE flood risk awareness program, GeoSeineGrandsLacs geographic information platform, COTECO hydrological monitoring committee, and manages projects such as La Seine Bassee flood control infrastructure and dam renovation works. Administrative publications, hydrological bulletins, and PAPI flood prevention action programs support institutional stakeholders.

Differentiator

Problem solved

Functional benefit

Brands

• EPISEINE: Awareness and education device on flood risk for the Seine basin population

Products and services

• EPTB Seine Grands Lacs Public territorial basin establishment managing water resources in the Seine basin.

Quantifiable outcome

• Current reservoir levels are monitored and managed in real-time (e.g., Der at 79%, Orient at 86%, Amance-Temple at 78%, Pannecière at 81% filling rates shown on homepage)

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Two partnerships are on record, tiered minor and core.

• Association Eau et Agriculture Durables du ChatillonaisminorOthers · 1 January 2025Seine Grands Lacs maintains membership in the Association Eau et Agriculture Durables du Chatillonais, which focuses on sustainable water and agricultural practices.
• Métropole du Grand PariscoreStrategic or Co-development Partner · 1 December 2020The Métropole du Grand Paris joined the governance structure of Seine Grands Lacs EPTB in December 2020, strengthening collaboration on water management and flood prevention in the Paris metropolitan area.

Scale indicators4 records

Recent moves7 records

Expansion highlights4 records

Broad incumbents

• Rijkswaterstaat: Dutch national agency responsible for major waterworks, flood defense, and freshwater management. Comparable as a public infrastructure operator with mandate for flood prevention and hydrological management, but operating at national scale across multiple basins.
• Compagnie Nationale du Rhône (CNR): French state-concessioned operator of Rhône river hydraulic infrastructure, including dams, locks, and hydroelectric plants. Comparable in operating large-scale hydraulic assets and integrated flood/flow management, but with a broader hydropower and navigation mandate.
• Voies Navigables de France (VNF): French public operator of the navigable waterway network, including associated hydraulic infrastructure along rivers including the Seine. Comparable as a public hydraulic-infrastructure operator with multiple governance stakeholders and recurring redevance-based funding.
• Environment Agency (UK): UK public body with statutory responsibilities for flood risk management, water resources, and environmental protection. Comparable as a public-sector entity combining flood-prevention infrastructure operations with environmental stewardship and regulatory functions.
• Électricité de France (EDF) — Hydro Division: Operator of France's largest fleet of hydroelectric reservoirs and dams, many of which share flood-management functions. Comparable in managing large reservoir infrastructure for hydrological regulation, though primarily driven by power generation.

Direct peers

• Établissement Public Loire (EPL): French EPTB designated for the Loire basin, performing an identical public mandate of basin-wide water resource management, flood prevention, and low-flow support through reservoir and dam infrastructure. Most directly comparable French peer given identical legal status (EPTB) and overlapping functional scope.
• EPTB Saône-Doubs: French EPTB for the Saône and Doubs basins, with a comparable mandate for coordinated water management and flood prevention across multiple sub-basins. Shares the EPTB legal framework and direct-to-territorial-collectivities operating model.
• Agence de l'eau Seine-Normandie: French water agency for the Seine-Normandie basin, responsible for water resource policy, redevance collection, and funding water infrastructure projects in the same geographic perimeter. Operates a closely related redevance-based funding model and coordinates with Seine Grands Lacs on basin strategy.

Others

• Météo-France: French national meteorological service providing hydrometeorological forecasting and climate data feeding into Seine Grands Lacs' reservoir operations and COTECO monitoring. Adjacent enabling partner rather than a direct peer, but functionally linked through shared hydrological data dependencies.

Regional players

• Institut d'Aménagement et d'Urbanisme de la Région d'Île-de-France (IAU-IDF): Regional planning institute for Île-de-France, coordinating territorial adaptation including climate-related water and flood risk planning in the Paris region. Adjacent to Seine Grands Lacs' mandate and increasingly a coordination partner given Métropole du Grand Paris involvement.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xtwitter.com/SeineGrandsLacs
• YouTubeyoutube.com/channel/UCZN17vyH9MIWXrPw4WfJ6Gg
• Facebookfacebook.com/EPTBSeineGrandsLacs
• LinkedInlinkedin.com/company/eptb-seine-grands-lacs
• Instagraminstagram.com/seinegrandslacs

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Seine Grands Lacs