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Our collective natural heritage. A critical national asset.
The Central Mangrove Wetland (CMW) is the ecological heart of Grand Cayman and one of the Caribbean's most significant remaining mangrove systems. Covering approximately 8,655 acres, this interconnected wetland supports the North Sound, provides habitat and nursery grounds for wildlife and fisheries, helps manage water and rainfall, stores carbon and strengthens Grand Cayman's resilience to flooding and storms.
It is part of our collective natural heritage — and a critical national asset.
Lean more about the Central Mangrove Wetland -- National Trust for the Cayman Islands

The roots of the Red Mangrove (Rhizophora mangle), a protected species. Photo credit: Nik Foster
The proposed East-West Arterial (EWA) extension would introduce major new infrastructure along the southern area of the Central Mangrove Wetland.
The Environmental Impact Assessment has progressed significantly since this page was first published. A Draft Environmental Statement was subject to public consultation in early 2025, and the Final Environmental Statement was published on 29 April 2025. It assesses the proposed road and alternatives across areas including transportation, engineering, hydrology and drainage, terrestrial ecology, greenhouse gas emissions, land-use development and cost-benefit analysis.
Since publication of the Final Environmental Statement, the proposed alignment has changed.
On 14 September 2026, the Cayman Islands Gazette published a Roads Act section 3 declaration for Boundary Plan 697 (BP697). The declaration records Cabinet's intention, acting on the recommendation of the National Roads Authority, to gazette a new public road through Savannah, Lower Valley, Duck Pond, Bodden Town and Breakers.
The concern is not limited to the land directly required for the road.
Major new infrastructure can open access to land that was previously difficult to develop. That can influence surrounding land use and create further demand for roads, drainage, utilities and public services.
The Central Mangrove Wetland cannot sensibly be considered parcel by parcel. Roads, subdivisions, drainage, filling and other infrastructure can affect water movement, fragment habitat and create cumulative pressures across the wider wetland system.
Sustainable Cayman continues to advocate for an EWA solution that avoids unnecessary impacts on the Central Mangrove Wetland and for integrated planning before development patterns become established.

Government's National Planning Framework identifies applicable areas within the Central Mangrove Wetland for a proposed Natural Resource Preservation Overlay (NRPO).
The proposed overlay would not change the underlying land-use zoning or land ownership. Instead, it is intended to provide additional planning measures to help protect important natural resources, including design requirements, mitigation and incentives.
Sustainable Cayman is calling for the Central Mangrove Wetland to be protected while the Development Plan process is completed, and for the NRPO to be formalised for applicable areas through the Development Plan and Area Plans.
We also support a long-term strategy that works fairly with affected landowners while protecting the ecological and hydrological integrity of the wetland.
Read the National Planning Framework — Natural Resource Preservation Overlay, section 4.1
In 2026, Government's Cayman Forward initiative called for a more coordinated approach to planning and environmental decision-making, rejecting the idea that development and environmental stewardship must be competing objectives. The Central Mangrove Wetland provides an important opportunity to put that principle into practice.
The decisions being made now will help shape the future of this landscape for generations to come.
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The roots of the Red Mangrove (Rhizophora mangle), a protected species. Photo credit: Nik Foster
Watch: Scope of the East-West Arterial

The United Kingdom has responsibility for 14 Overseas Territories which are astoundingly rich in biodiversity. However, this wildlife is under severe threat. The RSPB is providing support and advice to Sustainable Cayman as part of its programme of capacity building in the beautiful and wildlife-rich UK Overseas Territories of the Caribbean.
Click here to learn more.
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