The following text or PDF files are
attached in the blue box at bottom of the page (Click on
link, click to Open file, click on table title).
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(Microsoft Access database) Lists 145 items which remain
underground or lie in private hands. The list is far from complete, but
it gives an flavour of the type of existing relics relating to HDUM Ltd.
Documents (Updated Feb
(Microsoft Access database) Lists the full collection of 'Halkyn
Papers' rescued from vandalised mine offices at Hendre. This includes,
company blueprints, standard drawings, machinery catalogues etc. The
Halkyn Papers are currently kept by Grosvenor Caving Club.
(PDF file). HDUM maintained a set of "Standard Drawings". These
were used as 'blueprints' when manufacturing an item or constructing
rises, sumps etc. This file shows a selection of the more interesting
drawings. Originals kept by Grosvenor Caving Club. Scanned from
Chats with John Bellis:
(PDF file) Just a few pages of notes taken during
with HDUM miner John Bellis, who spent his entire working life with the
(PDF file) A partly damaged six page HDUM "Inventory of Kibbles"
dated 1937. Shows the eight designs used at the mine. Others have been
used since that time. Scanned from original.
An unpublished report by HDUM entitled "An
Attempt at Sealing Natural Water Holes or 'Swallows' in the River Alyn":
It describes extensive work carried out by the company in the 1930s to
reduce the water entering the Milwr Tunnel via natural fissures. Much of
the report has been re-typed, but the text & layout format reflects the
original. Complete with original photos. The actual document is held at
Flintshire Record Office, Hawarden.
Water Levels at Olwyn Goch Shaft:
(PDF file) Rescued from vandalised mine offices at Hendre: Three
pages of gaugings taken by HDUM in the Milwr Tunnel at Olwyn Goch Shaft
between 1980 and 1984. Re-typed from original.
To download, click on links