# Mines (Working Facilities and Support) Act 1923, Schedule FIRST: Percentage Contribution


Depth in Yards.
Percentage.
160
Nil.
170
3
180
5
190
8
200
10
210
12
220
14
230
15
240
16
250
17
260
19
270
21
280
23
290
24
300
25
350
30
400
35
450
40
500
45
550
50
600
55
650 and over
60
The percentage at intermediate depths to be in proportion.

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Source: https://www.legislation.gov.uk/ukpga/Geo5/13-14/20/schedule/FIRST (the official version)
Page: https://openlegislation.uk/mines-working-facilities-and-support-act-1923/schedule-FIRST
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.