Benchmark on the 'FEET 4000' stone, North Bull Wall
Ordnance Survey pivot benchmark on the 'FEET 4000' stone alongside the North Bull Wall. The mark is recorded on old maps levelled at 25.8 feet above Dublin Datum/Poolbeg Lighthouse Datum. There are five stones shown on old maps, but the 'FEET 1000' stone may now be missing. For a wider view see O2235 : 'FEET 4000' stone on North Bull Wall, Dollymount
Benchmark Database: Link