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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 converstations
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.
Sealing Alyn TEXT (Part 1):
(PDF file) An unpublished report by HDUM dated 1938 entitled "An
Attempt at Sealing Natural Water Holes or 'Swallows' in the River Alyn":
Describes extensive work carried out by HDUM to reduce the water
entering the Milwr Tunnel via natural fissures. Re-typed, but the text &
layout formats reflect the original. The original report includes many
pages of supporting (but fairly boring) information which are not
included in the file below, although the main area plans showing
individual swallows are attached as a seperate file below as "Sealing
Alyn PLANS". The original document is held at Flintshire Record
Sealing Alyn PLANS (Part 2):
(PDF file) Three specific areas of the Alyn Gorge showing the
work carried out in the 1930s, but now (Oct 2009) with a fourth plan of
the entire Alyn Gorge showing all the gauging weirs, diversions and
areas of worst leakage. All four have been re-drawn from the originals
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