a few environmental success stories - blug-ublg mining... · 2016. 1. 19. · calamite, criquet à...
TRANSCRIPT
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A few environmental success stories
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Reclamation of the old Merlemont Quarry
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Reclamation of the old Merlemont Quarry
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MOR/BSL has not
been rated « Natura
2000 »
Our old pits joined the Natura
2000 net
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Merlemont quarry
The old quarries provide an interesting substitution natural habitats
Front walls exposed to south or north
Rocky screes
Sandy material piles
Permanent and temporary ponds
Dry calcareous grass land
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A good rehabilitation aims at:
Valorising those habitats (fauna & flora)
Maintaining the habitats trough the time = management of the reserve
In specific cases, taking actions to speed up the recolonization
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Some species present in our quarries :
• Faune : orvet (femelle gravide), Chouette hulotte, Lézard des murailles, azuré du trèfle, Grenouille verte, Couleuvre à collier, Hespérie de la mauve, Argus bleu-nacré, Stenobothrus lineatus, Erythrée élégante, Martin pêcheur, Lézard des murailles, Alyte accoucheur, Crapaud calamite, Criquet à ailes bleues, Machaon
• Flore : Bois gentil, Galeopsis à feuilles étroites, Epiaire des Alpes, Ceterach, Catapode rigide, Orchis de Fuchs, Genevrier, Plathantère des montagnes, Lastrée du calcaire, Platanthère des montagnes, Fétuque penchéé, Renoncule aquatique, Mouron bleu, Catapode rigide, Apipactis brun rouge, Gymnadénie moucheron épiaire, Epiaire annuelle, Chardon-Marie, Erythrée petite centaurée, Pullicaire dysentérique, Cornouiller mâle, Chardon penché, Renoncule des bois
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7Bank swallows
Natterjack toad
Eagle Owl
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• Walls exposed to south
Habitats on the site that we try to preserve or extend
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Tests to speed up colonization
Ground design for a future dry grass land
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Natural reserve
With the land planning modification, our old pits became a natural
reserve for 30 years rated Natura 2000
We have to finalize the rehabilitation of those old pits, to maintain the
natural reserve and to help the biological transfer between Bois Saint-
Lambert and the old pits at our own expense
The Nature and Forest Administration plans the maintenance
A steering committee will be soon take place (spring 2016), including
members of our company
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The integration of the future depleted pits is also studied
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11Natural reserve (surface: 30ha)
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1994
Reclamation of the Ampsin quarry (Dumont-Wautier)
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Reclamation of the Ampsin quarry (Dumont-Wautier)
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Final pit design (1994)
How the quarry should have looked like at the completion of
mining
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The operation si stoped in 2002
North face collapsed in Feb 2002
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Mid 2004: A new reclamation project is set up with support of a
landscaping consultant
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End 2004: Presentation of
the project to the Town
It is decided to leave the
maintenance to the DNF but
with a close cooperation with
the Town and the DW
company
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The basic idea was to valorise
the area as it was let by the
mining activity
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Partly in free access and partly
guided by DNF visit
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The wish of the company :
Keep remains of the past activity
1950
1920
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The wish of the DNF :
Biodiversity, safety and legal use for at least 30 yrs
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The maintenance includes :
To keep wide open areas
To keep the variety of environments
Fight again woody vegetation
Fight again invasive species
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Some lessons from
this experience
Take into account the field realities and opportunities
Start as soon as possible the collaboration with the future
managers of the reserve
The biological enrichment is a slow process, good reason to
start it as soon as possible
Foresee a steering committee