Covered Bolts
From TrigpointingUK
A very small number of bolts have been found covered with a metal plate approx 12" square with the warning sign 'ORDNANCE / SURVEY / DO NOT / DISTURB' embossed on a raised circular disc at centre of the plate. To date (March 2022) all of these have been located within the southern portion of the Lake District National Park.
'Covered Bolt' is a trig baggers term. In T:UK and OSGB36 they are known as either Bolts or Buried Blocks.
| T:UK | Station name | Order | Computed | Block |
|---|---|---|---|---|
| TP17120 | Gilpin Park | 3 | 1950 | SD47 |
| TP8079 | Lowick | 2 | 1950 | SD47 |
| TP16492 | Ponsonby Fell | 2 | 1952 | NY11 |
| TP8081 | Redscar | 3 | 1950 | SD47 |
| TP13003 | Top o' Selside | 2 | 1950 | SD47 |
| TP7820 | Wansfell Pike | 2 | 1950 | SD47 |
