^"X Of the UnJer-ground inclined Flimk 



ami Bolton, in I^ncafliire. To this acconnt I have fubjoihea 

 two plans, with a table of reference to each. 



At Worfley thie Duke of Bridgewater's navigation begins j 

 it goes weft to Ixigh, and' eall to Manchefter, where it locks 

 ti|> into the Rochdale canal.. In its way to Manchelkr, it 

 turns- out, in a wefterri direction, neai^ Longford Bridgej to 

 Ifnect t'he Grand Trunk Canal above Prellon Brook ; arid 

 from thence it goes north-weft to Runcorn, where it locks 

 liuwn into the Merfey, in the tide-way to Liverpool. 



To this navigation above-ground, which, in all its direc- 

 tions, is extended through a length of forty* miles, upon one 

 Imel, without tutinel or lock, except the Idcks at the extre- 

 mities. At Woril'ey, an under-ground navigation is joined'^ 

 Tvhich goes to the different mines of coal under Walkden- 

 Moor ; frdm which mines, by thefie navigations above- 

 jcround and under-ground, Manchefter and various other 

 places are fupplied with that valuable article. 



The canals of this under-ground navigation lift upon i\r6 

 levels, or fiories. 



The lower is upon the fame level with the open navigation, 

 which it joins at Worfley ; and confifts, in the different 

 lines which it purfues to the different feams of coal, of near 

 tAvelve miles of tunnelling* 



The higher is thirty-five yards and a half perpendiculat^ 

 height above the level of the lower, and varies from thirty- 

 eight to fixty-one perpendicular yards below the furface of 

 the earth, and confifts of near fix miles of tunnelling. 



The tunnelling of each level is ten feet four inches wide, 

 and eight feet fix inches deep 3 and the depth of water, three 

 feet {'even inches. 



Before a communication was made by an inclined plane^ 



*■ • Forfy miks upon on', /cvfl.'] Adding to thefe forty miles, nearly; 

 nrel.'c milcn of the Duke of Bridgcwater's- Under-ground Navigable 

 Caaul, which lie upon his lower main level> and including^ eighteen mrres 

 of the Gr.md Trunk Canal betwixt the lowcft lock between Middlewich 

 and Prefton-brock, there are feventy miles of navigable canal, without a 

 lock, upon one level, eighty-rvi'o feet above low- water mark; whereby a 

 communication is obtained between London, Liverpool, Briflol, and Hull. 

 At this loweftlock the Grand Trunk Navigation locks down, to be uponi 

 a level with the Duke of Bridgewaier's. 



the 



