Bristol to Plymouth

First primary levelling, England & Wales.
Geodetic line, levelled between February 1849 and August 1849.

Levelling Route

	BOLT	Bolt in North-east corner of West end of St. Mary's Church, Radcliff Hill ; 2.80 ft. above surface	47.9080ft	ST 5909 7233
	PIVOT	Mark on 9th milestone from Bristol, and 7th from Cross ; 3.34 ft. above surface	185.0900ft	ST 4914 6242
	BOLT	Bolt in South corner of East end of Saint Mary's Church, Bridgewater ; 1.51 ft. above surface [1GL, Bristol to Plymouth, Mark No. 91(a)]; Bolt in South corner of East end of St. Mary's Church, Bridgewater ; 1.51 ft. above surface [1GL, Bridgewater to Plymouth, Mark No. 1]	41.4800ft	ST 2979 3699
	BM	Mark on tower at East end of Saint Mary's Church, Bridgewater ; 1.42 ft. above surface	42.7200ft	ST 2979 3699
	BOLT	Bolt in buttress on West side of North Petherton Church ; 2.90 ft. above surface	121.9460ft	ST 2901 3302
	BOLT	Bolt in corner of Exeter Cathedral, 67 links East of principal doorway ; 1.35 ft above surface	129.1030ft	SX 9205 9256
	BOLT	Bolt in West battlement of Chudleigh Bridge ; 1.90 ft. below top of battlement	73.5310ft	SX 8573 7849
	BOLT	Bolt in top of coping-stone in North battlement of Skew Bridge, over Railway at Plympton ; 4.16 ft. above centre of bridge	41.2700ft	SX 5344 5642

Side Levels

	BOLT	St. John's Church, Bridgewater. Bolt in W. side of tower at doorway ; 3.37 ft. above surface	26.480ft	ST 3030 3733
	BOLT	St. Mary Magdalene's Church. Bolt in W. side of tower, near doorway ; 0.84 ft. above surface	60.382ft	ST 2286 2459
	BOLT	Broad Clist Church. Bolt in West side of tower, near doorway ; 1.96 ft. above surface	76.232ft	SX 9815 9727
	BOLT	Plympton St. Mary's Church. Bolt in Tower, beside door at West side ; 3.32 ft. above surface	22.402ft	SX 5373 5633

This route is covered by Landranger sheets 172, 182, 191, 192 and 201. (interactive map)

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