Extraction Plan - Peabody Energy

Extraction Plan – North Wambo Underground Mine Longwalls 7 and 8Table 17Built Feature Performance Measures, Performance Indicators and Contingency Measures for Longwalls 7 and 8Performance Measure Performance Indicator(s) Relevant Management and Contingency MeasuresFor all built features: The performance indicators developed for WCPL-owned assets will Contingency measures will be developed as required on abe considered to have been exceeded if:case-by-case basis in consultation with the relevant• the structural integrity of any WCPL assets is assessed to WCPL stakeholders and government agencies.have been compromised;• Ensure built featuresare always safe.• Serviceability shouldbe maintainedwherever practicable.Loss of serviceabilitymust be fullycompensated.• Damage must be fullyrepairable, and mustbe fully repaired or elsereplaced or fullycompensated.• the functionality of any WCPL powerlines, cables or pipelines iscompromised;• the powerline clearance from vegetation/access tracksidentified during monitoring has reduced following secondaryextraction within 100 m of any above ground powerlines; or• the integrity of access roads required for the serviceability ofWCPL assets is not maintained.The performance indicators developed for South Wambo Dam willbe considered to have been exceeded if:• the structural integrity of the South Wambo Dam embankmentis assessed to have been compromised;• there is evidence of storage leakage from South Wambo Dam;or• the integrity of access roads required for the serviceability ofSouth Wambo Dam is not maintained.Relevant contingency measures will be developed as partof an application for mining within the South Wambo DamNotification Area and the North East Tailings DamNotification Area which will be submitted to the DSC priorto mining within this area.EP/SMP LW7-8 Rev B December 2012 Page 43