Date post: | 29-Jan-2018 |
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Reclamation of the
Former Steelworks Ebbw Vale
Presentation by
Clive Williams and Raymond J Kenny
Former Steelworks Ebbw Vale
• The Site
• Constraints
• Site History
• Mining
• Contamination
• Mine Entries
• River Culvert
• Basements
• Reclamation
• The Works
Location Location
Key Areas of Constraint
• Ground Conditions including mining and contamination
• Drainage including ground and surface water
• Basements and Tunnels
• Walls, slopes and ground levels
• Existing infrastructure, including highways and services
• Landscape/Biodiversity
Former Steelworks Ebbw Vale
Site History
Past uses include:
• Steel/Ironworks
• Plating/galvanising works
• Coal Mining
• Gas works
• Coking Ovens
• Rail sidings
• Stores
• Offices
Mining Setting
• Lower Pentre
• Soap coal seam (Eighteen Inch)
• Black Pins/Coronation Coal (Gorllwyn Rider)
• Black Pins Mine Ground (Ironstone) (Cefn Coed Marine Band)
• Two Feet Nine
• Elled coal seam (Upper Four Feet)
• Big Vein coal seam (Lower Four Feet)
• Threequarter coal seam (Upper Six Feet)
• Gough’s Mine Ironstone
• Black coal seam (Upper Nine Feet)
• Upper Meadow Vein or Upper Engine coal seam (Yard)
• Gwar y Cae coal seam (Seven Feet)
• Old coal seam (Five Feet /Gellideg)
• Spotted Vein Ironstone
• Red Vein Ironstone
Shallow Mine Workings
Contamination
• Site investigation has identified a series
of contamination ‘hot spots’ throughout
the site.
• In particular these relate to elevated
metals and hydrocarbon contamination.
Contamination
Contamination
Coke Works Coke Works
Benzol plant Gas Works – Central Valley
Contamination
Tar Filled pipes Grease Filled pipes
Pools of Hydrocarbon
contamination on Till Northern Gas Works
Bioremediation
• Hydrocarbon contamination of
the soils was subject to
bioremediation
• Contaminated soils were
transported to the Hot Mill site
• Soils screened
Bioremediation
• Biopile formed
• Soil mixed with compost and
fertiliser
• Windrows covered
Biopile RE8
0
10
20
30
40
50
60
Sta
rtin
g C
onc.
Week 3
3
Week 3
5
Week 3
7
Week 3
9
Week 4
1
Week 4
3
Temp ('C)
Napthalene (mg/kg)
Benzo(a)pyrene
(mg/kg)
Dibenzo(a,h)anthrace
ne (mg/kg)
Napthalene site limit
(mg/kg)
Benzo(a)pyrene site
limit (mg/kg)
Dibenzo(a,h)anthrace
ne site limit (mg/kg)
Bioremediation
Mine Entries
• On basis of The Coal Authority and
initial investigations 5 mine adits
and 14 mine shafts are recorded at the
site
No 22 Pit
No 19 Pit
No 15 Pit House No 4 Pumping Pit House
Mine Entry Treatment
No 19 Pit Investigations
No 22 Pit
Mine Entry Treatment
No 19 Pit Investigations
River Ebbw Culvert
Basements
0 1 2 3 4 5 6
Basement Complexes
3.1-4.5
4.6-6.0
6.1-7.5
7.6-9.0
Ra
ng
e
Basement Depths (m)
Basements
Basements
Basements
Slab Demolition
Plateaux Creation
Soil Forming
Reclamation 2007/08
Reclamation 2008
Reclamation 2008
Reclamation 2008/09
Reclamation 2008
Reclamation 2008
The Works
Thank You