Northern France Regional Post-mining Unit (UTAM North)

Introductory paragraph

The BRGM’s Regional Post-mining Unit for Northern France (UTAM-Nord), based at Billy-Montigny (Pas-de-Calais), covers the Champagne-Ardenne, Nord-Pas-de-Calais and Picardy regions.


The Nord-Pas-de-Calais coal basin, where mining dates back to 1734, was France’s largest, covering more than 1000 km2 and producing a total of 2.4 billion tonnes of coal. The last of its 621 pits was closed in 1990.

The Boulonnais coal basin, with 264 mineshafts identified, was mined from the 17th century until 1949.

Safety engineering work

  • Safety work on adjacent housing
  • Infilling or closing off galleries
  • Location and treatment of mineshafts
  • Dyke construction

Surveillance of mine workings

Mine surveillance and risk prevention facilities and equipment

  • Ore and tailings dumps (10)
  • Mine gas release points (72)
  • Piezometers (6)
  • Levelling networks (5)
  • Capped mineshafts (420)
  • Uncapped mineshafts (40)

Hydraulic safety facilities

  • Dykes (1)
  • Piezometers (10)
  • Pumping stations (52)

Facilities subject to compliance with the Environment Code

  • Piezometers (133)
  • Surface water sampling points (14)

Management and conservation of technical archives

Management and conservation of technical archives.

Contributions to mining intelligence

Information is delivered online for the concessions whose archives have been transferred to the DPSM (mainly Charbonnages de France).

This activity is to be extended to other concessions.


Practical information

DPSM - Unité Territoriale Après-Mine Nord

Rue Louis Blériot
62420 Billy-Montigny

Sandrine Lemal
Tel.: +33 (0)3 21 79 00 62
Fax: +33 (0)3 21 79 00 58

Public opening hours
Monday to Friday, by appointment
8 a.m. to 12 noon, 2 p.m. to 4 p.m.