Boral — Corporate Update (August 2018)
26 slides from Boral's corporate update, Aug 13, 2018
Slide 1: Berrima Colliery - Closure Working Group
Berrima Colliery - Closure Working Group >Welcome Mittagong RSL 13 August 2018
Slide 2: Agenda
Agenda 1. Welcome and introductions 2. History of colliery and decision to close 3. Site and surrounds 4. How did we get here 5. Current status 6. Next steps 7. CWG role and information needs 8. General business Titlefefefefeffff4g45g4545 9. Next meeting
Slide 3: Introductions
Introductions > Boral - Fabio Colusso, Greg Johnson, Rod Wallace > Resource Regulator - Greg Kininmonth, Will Mitry > Environment Protection Authority - William Dove, Andrew Couldridge > WaterNSW - Ravi Sundaram > Wingecarribee Shire Council - Barry Arthur Titlefefefefeffff4g45g4545 > Western Sydney
Slide 4: History and decision to close
History and decision to close ● Early mine workings in 1870’s ● Continuous operations since 1926 ● Bord and pillar mining - supplied cement works with coal ~250,000 tpa ● Legislative changes in 2007 - need development consent ● Development application for continued operations 2011 ○ Limited baseline
Slide 5: Site and surrounding environment
Site and surrounding environment Titlefefefefeffff4g45g4545
Slide 6: Surface infrastructure
Surface infrastructure Titlefefefefeffff4g45g4545
Slide 7: Surface infrastructure – Pit Top
Surface infrastructure – Pit Top Titlefefefefeffff4g45g4545
Slide 8: Site and surrounding environment (cont'd)
Site and surrounding environment (cont’d) Titlefefefefeffff4g45g4545 urce: Resource Regulator
Slide 9: Cross sections plan view
Cross sections plan view Titlefefefefeffff4g45g4545
Slide 10: Cross section A
Cross section A Titlefefefefeffff4g45g4545
Slide 11: Cross section BB
Cross section BB Titlefefefefeffff4g45g4545
Slide 12: Cross section CC
Cross section CC Titlefefefefeffff4g45g4545
Slide 13: How did we get here?
How did we get here? ● 2013 - Care & maintenance announcement ● 2014 - Decision to close - intention to fully seal ● 2015 - Geotechnical advice indicates high leakage ○ Consistent water quality – seek free draining mine ○ Lodge closure plan ● 2016 - Cease pumping – mine begins to free drain ○ Elevat
Slide 14: Extent of flooded workings
Extent of flooded workings Titlefefefefeffff4g45g4545
Slide 15: Pit top trials used to design underground treatment trial
Pit top trials during November 2017 were used to design underground treatment trial Titlefefefefeffff4g45g4545
Slide 16: Current status
Current status ● Underground treatment ● Assumption validation of sealing – interim sealing plan ● Gathering feedback (CWG) Titlefefefefeffff4g45g4545
Slide 17: Underground treatment installed in stages Dec 2017 to Jan 2018
The underground treatment was installed in 3 stages from early December 2017 until mid January 2018 Titlefefefefeffff4g45g4545
Slide 18: Water Quality Improvements following treatment - Iron
Water Quality Improvements following treatment - Iron Titlefefefefeffff4g45g4545
Slide 19: Water Quality Improvements following treatment - Manganese
Water Quality Improvements following treatment - Manganese Titlefefefefeffff4g45g4545
Slide 20: Water Quality Improvements following treatment
Water Quality Improvements following treatment Titlefefefefeffff4g45g4545
Slide 21: Interim Sealing Plan - Roof bolting, dewatering & Bulkheads B1 - B7
Interim Sealing Plan - Roof bolting works, dewatering & Bulkheads B1 - B7 Titlefefefefeffff4g45g4545
Slide 22: Next steps
Next steps ● Interim sealing plan to validate flow and porosity assumptions ● Further CWG consultation ● Lodgement of Stage 2 Closure Plan Titlefefefefeffff4g45g4545
Slide 23: CWG role and information needs
CWG role and information needs Titlefefefefeffff4g45g4545
Slide 24: General business
General business Titlefefefefeffff4g45g4545
Slide 25: Next meeting date
Next meeting date Titlefefefefeffff4g45g4545
Slide 26: Slide 26