High Dyke, Lincolnshire

High Dyke is a minor road following a length of the Roman Road Ermine Street in the English county of Lincolnshire, between Woolsthorpe-by-Colsterworth and Ancaster, and onwards nearly to Bracebridge Heath. It is also the name of a small settlement on that road, 1 mile (1.6 km) south-east from Great Ponton, near to the mouth of Stoke Tunnel on the East Coast Main Line. High Dyke is also a name for the general area between Easton and Great Ponton. On the Ordnance Survey 1:25000 sheets it is spelled High Dike.

Recent rebuilding of the A1 road junction at Woolsthorpe-by-Colsterworth in 2008 has included construction of a grade-separated road crossing in place of the disused railway bridge that was part of the High Dyke branch, a mineral railway used to export iron ore between 1916 and 1973.

There is a roundabout adjacent to Prince William of Gloucester Barracks east of Grantham, but all other junctions are conventional grade-level crossroads or T junctions.

The modern route begins as the B6403 at the grade-separated junction with the A1 at Colsterworth (SK930249). At Easton Farm, it meets the line of Ermine Street from the south (SK937261), and runs north-south. There is a right turn for Burton Coggles to the right, and the 18-acre Easton Cold Store, built in the late 1960s, and run by XPO Logistics, formerly Norbert Dentressangle. When built, and throughout the 1970s it was thought to be the largest cold store in Europe. To the left is a turn for Easton and the Easton Walled Gardens, where the road is at 119 metres high. Further north, past the cold store, the width of the road narrows. The section of road from the A1 was widened and straightened in 1969 when the cold store was built.

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