A 10-mile buffer zone to protect the Pontcysyllte Aqueduct and Llangollen Canal from development is being considered by Wrexham councillors.
The planning guidance has been drawn up in response to a recommendation by UNESCO, which awarded the site World Heritage Status in 2009. The agency called for a single document outlining the need to protect the area.
Denbighshire and Shropshire councillors will also vote on the guidance drawn up after public consultation.
The world heritage route runs from Thomas Telford’s 200-year-old aqueduct and along the canal, passing through Chirk and Whitehurst tunnels, and over Chirk Aqueduct.
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