Letter – William Westgarth to John Erasmus Blackett – 9 Mar 1773

Document Type: Letter
Date: 9 Mar 1773
Correspondent: William Westgarth
Recipient: John Erasmus Blackett
Archive Source: NRO ZBL 84 10
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								Whiteleeshield March 9th. 1773.


	I have been either so unwell of a Pain in my Head, or so very busy, since I waited on you at Newcastle Octor. the 14th. 1772, that I have never been able to get properly forward with the calculations relating Fallowfield – lead-mine, and, but for the above reasons, should be ashamed to offer my thoughts now, so late.   However, I have at last taken all the pains I can, and find, from what I have observed, and have been informed of, from time to time That



From the Engine Shaft, - which is 63 1/2 fathoms deep.

   To – where Acomb level cuts the Vein           fathms    Bank level

      at a Shaft Called Nook Shaft, it is            259        12 

       Nook Shaft 27 fa: deep.

   To where Mr.Walton propos’d an Engine, 

      mark’d D, in his plan                          547        27 1/2

       Which is not so deep as Acomb-level 

       by 11 1/2 fathoms

   To North-Tyne -level mouth                        973        51 1/2

   To Ditto       level forehead                     736

And from Acomb level-head, at Nook Shaft 

   To Tyne level forehead                            477

Now                                                             fathms

   The Bank-level from the Engine to Tyne, being                51 1/2 

   The Bank-level from the Engine to Nook Shaft                 12

      And the deepth of Nook Shaft                              27

   Makes the level, from the Engine Shaft top, 

      to Acomb-level head at Nook Shaft foot                    39

   Which, deducted from the depth of Tyne-level 

      51 1/2 fa: shews Tyne-level to be, deeper 

      than Acomb-level, only                                    12 1/2

   Of which probably has, and will be lost, in 

      driving up the sd. Tyne level to Nook Shaft                2 1/2

So that, the difference at most will be only about 10 faths. gain’d, by driving, or bringing up Tyne-level 477 faths. at 3 or 4 £ a fathm. provided you keep clear of all misfortunes.

      From the above measurements &c. the ground west of the Engine, may, in my opinion be sufficiently tryed, with an Engine fix’d at Nook Shaft, called, The new statical Engine, being such a one as we mostly use in this Country now, as they are, not only the cheapest, but answers the purpose best where the fall is great, as at Nook-Shaft; or indeed any fall [above] 5 faths. and is the only one I know of that would ansr. the purpose there; which I think it would do, with the Water afforded by St. Oswalds Colliery and the other feeders you might collect to work it with.

	It is a trial, like the others, that I would not be fond of Encouraging you in, tho’ it is certainly the most promising of any about Fallowfield-mine, that I know of, done at the least expence <an>d undoubtedly in the least time.   The Engine may be mostly made from the Materials of the old one, if you choose to take it out; And Acomb-level and Nook-Shaft might soon be opened out; which Shaft with a little alteration would Ansr. for the Engine Shaft, as well as a drawing and climbing Shaft.

	Your present feeders at Fallowfield is about 65 Ale-gallons pr minute in Summer, and 104 in Winter; which feeders, tho’ not great, are considerably greater than I expect you would have at Nook Shaft; feeders I expect (I mean Nook-Shaft feeders) the New Engine would draw from the deepth of 25 or 30 faths. below Acomb-level, where she would land her water; but the deepth would be more, or less, in proportion to the quantity of water you would meet with.

      I am Sir Your most obedient huml. Servt. to command

      Wm. Westgarth
William Westgarth invented the hydraulic engine he recommends to J.E.Blackett for dewatering Fallowfield.   He was a mine agent for Walter Calverley Blackett.   An ale gallon was 282 cubic inches, very slightly larger than the later imperial gallon.

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The Dukesfield Smelters and Carriers Project aimed to celebrate and discover the heritage of the Dukesfield Arches & lead carriers' routes between Blaydon and the lead mines of Allendale and Weardale. A two year community project, it was led by the Friends of the North Pennines in partnership with Hexhamshire and Slaley Parish Councils and the active support of Allendale Estates. It was funded by the Heritage Lottery Fund and the generous support of other sponsors. Friends of the North Pennines: Charity No:1137467