1GL Bolt: Clay Cross, Church   

Bolt in South-west corner of Clay Cross Church tower ; 2.33 ft. above surface [1GL, Sheffield to Birmingham, Mark No. 70] - estimated location.

Location
Grid reference: SK 3912 6329.
Landranger 119: Buxton & Matlock, Bakewell & Dove Dale.
Structure: Church.
Waypoint: BT1009.

Neighbouring Bench Marks

BM	Clay Cross, Church 22.36m to the northeast.
BM	Stretton 1.51km to the south.
BOLT	North Wingfield, Church 1.76km to the northeast.
BM	Stretton 2.00km to the south.
BM	Stretton, Toll House 2.56km to the south.

The nearest fundamental bench mark is Matlock, 9.39km to the southwest.

First Primary Levelling, England & Wales (1840-60)
This bench mark was used during the First primary levelling, England & Wales, and was levelled with a height of 481.3700 feet [146.7216 metres] above mean sea level (Liverpool datum). It was included on the Sheffield to Birmingham levelling line. The surveyor's description was Bolt in South-west corner of Clay Cross Church tower ; 2.33 ft. above surface.