Milestone and bench mark, Hazeldene

Image: © Maigheach-gheal Taken: 4 Apr 2010

For a wider view Image Milestones did not come into general use until the Turnpike Act of 1766 made them compulsory on turnpike roads, these roads were built by private enterprise under licence from the Government and maintained by tolls on those who used them. Before this Act milestones were put up occasionally, often as charitable acts and commemorations. Many Turnpike Act stones still exist. They are usually 2-3 ft high, with the initial letter or abbreviation of the nearest market town show on two faces, and the distance from it. Lots of information about the bench mark at A bench mark is an Ordnance Survey arrowhead sign found on walls, bridges, churches and specially erected triangulation pillars where the altitude above sea-level has been accurately measured by surveyors. The arrowhead points to a horizontal line above it which marks the exact altitude. With rivets and pivots there is no datum (horizontal line) cut, the pointed-to horizontal surface defining the datum height.

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