Question: What navigable canal crosses the border between England and Wales and contains the Trevor basin?

Context paragraphs:
Saint Lawrence River Divide: The Saint Lawrence River Divide separates the Great Lakes Basin from the rest of the Atlantic Ocean watershed.  Two canals cross the divide: The Chicago Sanitary and Ship Canal crosses the Chicago Portage and connects Lake Michigan to the Mississippi River watershed.  The Erie Canal connects Lake Erie to the Hudson River watershed.  Historically there were additional canals, e.g., the Ohio and Erie Canal, but most of these are no longer in operation.

Chichester Canal: The Chichester Canal is a navigable canal in England.  It runs 4.5 mi from the sea at Birdham on Chichester Harbour to Chichester through two locks.  The canal (originally part of the Portsmouth and Arundel Canal) was opened in 1822 having taken three years to build.  When completed the canal could take ships of up to 100 tons.  Dimensions were limited to 85 ft long 18 ft wide and a draft of up to 7 ft .

Phibsborough: Phibsborough ( ; Irish: "Baile Phib" ), also spelled Phibsboro, is a mixed commercial and residential neighbourhood in Dublin, Ireland.  The Royal Canal crosses the district at Cross Guns Bridge.  Formerly, a branch of the canal ran to the Broadstone basin, later the site of the Midland Great Western Railway Terminus and currently the headquarters of Bus Éireann.  Mountjoy Prison is located in the district.  Phibsborough is also a parish in the Fingal South West deanery of the Roman Catholic Archdiocese of Dublin.  It is served by the Church of St Peter.

Balcaia: The Balcaia is a tributary of the Someş in Romania.  The river, which originates near the village of Dacia, is totally channelized and, at present, is part of the drainage system of the Someș plain, being referred to as Keleti or Keleti Canal.  The canal crosses the border into Hungary where it reaches the Someș.

Llangollen Canal: The Llangollen Canal (Welsh: "Camlas Llangollen" ) is a navigable canal crossing the border between England and Wales.

Ashby Canal: The Ashby-de-la-Zouch Canal is a 31 mi long canal in England which connected the mining district around Moira, just outside the town of Ashby-de-la-Zouch, with the Coventry Canal at Bedworth in Warwickshire.  It was opened in 1804, and a number of tramways were constructed at its northern end, to service collieries.  The canal was taken over by the Midland Railway in 1846, but remained profitable until the 1890s, after which it steadily declined.  Around 9 mi passed through the Leicestershire coal field, and was heavily affected by subsidence, with the result that this section from Moira, southwards to Snarestone, was progressively closed in 1944, 1957 and 1966, leaving 22 mi of navigable canal.

Stainforth and Keadby Canal: The Stainforth and Keadby Canal is a navigable canal in South Yorkshire and Lincolnshire, England.  It connects the River Don Navigation at Bramwith to the River Trent at Keadby, by way of Stainforth, Thorne and Ealand, near Crowle.  It opened in 1802, passed into the control of the River Don Navigation in 1849, and within a year was controlled by the first of several railway companies.  It became part of the Sheffield and South Yorkshire Navigation, an attempt to remove several canals from railway control, in 1895.  There were plans to upgrade it to take larger barges and to improve the port facilities at Keadby, but the completion of the New Junction Canal in 1905 made this unnecessary, as Goole could easily be reached and was already a thriving port.

Trevor Basin: Trevor Basin is a canal basin on the Llangollen Canal, situated near Trevor, in Clwyd, between Llangollen and Ruabon.

Huddersfield Broad Canal: The Huddersfield Broad Canal or Sir John Ramsden's Canal, is a wide-locked navigable canal in West Yorkshire in northern England.  The waterway is 3.75 miles (6 km) long and has 9 wide locks.  It follows the valley of the River Colne and connects the Calder and Hebble Navigation at Cooper Bridge junction with the Huddersfield Narrow Canal near Aspley Basin in Huddersfield.

Shropshire Union Canal: The Shropshire Union Canal is a navigable canal in England.  The Llangollen and Montgomery canals are the modern names of branches of the Shropshire Union ("SU") system and lie partially in Wales.

Supporting paragraphs: Trevor Basin Llangollen Canal
Answer: The Llangollen Canal