U.S. Operations
| 2000 | 2001 | 2002 | 2003 | 2004 | |
| MANAGEMENT SYSTEMS | |||||
| Facilities with ISO 14001 and/or OHSAS 18000-based management systems | 0 | 2 | 3 | 3 | 3 |
| Generation capacity with ISO 14001 and OHSAS 18001-based management systems (%) | 0 | 87 | 89 | 97 | 97 |
| Management system audits 1 | 2 | 2 | 2 | 0 | 3 |
| Compliance audits | 2 | 0 | 2 | 0 | 3 |
| ENVIRONMENTAL PERFORMANCE | |||||
| Air emissions 2 | |||||
| Sulphur dioxide (tonnes) | 75,800 | 59,700 | 17,300 | 7,200 | 6,200 |
| Sulphur dioxide emission intensity (kg/MWh) | 7.93 | 6.56 | 1.81 | 0.63 | 0.58 |
| Nitrogen oxide (tonnes) | 18,100 | 16,500 | 13,420 | 16,320 | 13,940 |
| Nitrogen oxide emission intensity (kg/MWh) | 1.89 | 1.81 | 1.41 | 1.43 | 1.31 |
| Particulate matter (tonnes) | 1,230 | 1,030 | 1,140 | 1,310 | 1,290 |
| Particulate matter emission intensity (kg/MWh) | 0.13 | 0.11 | 0.12 | 0.11 | 0.12 |
| Mercury (kilograms) | 77 | 55 | 55 | 51 | 50 |
| Mercury emission intensity (mg/MWh) | 8.05 | 6.01 | 5.74 | 4.48 | 4.70 |
| Greenhouse gas emissions 3 | |||||
| Carbon dioxide (CO2E tonnes) | 9,474,000 | 9,395,000 | 9,740,000 | 11,468,000 | 11,179,000 |
| Methane (CO2E tonnes) 4 | 38,000 | 41,000 | 57,000 | 55,000 | 50,000 |
| Nitrous oxide (CO2E tonnes) | 41,000 | 49,000 | 81,000 | 68,000 | 64,000 |
| CFC-11 (CO2E tonnes) | 0 | 0 | 0 | 0 | 0 |
| Sulphur hexafluoride (CO2E tonnes) | 0 | 0 | 0 | 0 | 0 |
| Gross emissions (CO2E tonnes) | 9,553,000 | 9,485,000 | 9,878,000 | 11,591,000 | 11,293,000 |
| Emission reductions (CO2E tonnes) | 48,800 | 73,300 | 189,100 | 241,000 | 192,000 |
| Net emissions (CO2E tonnes) 5 | 9,504,000 | 9,412,000 | 9,688,900 | 11,350,000 | 11,101,000 |
| Gross emission intensity (kg CO2E/MWh) | 1,000 | 1,043 | 1,036 | 1,012 | 1,062 |
| Net emission intensity (kg CO2E/MWh) 5 | 995 | 1,035 | 1,016 | 991 | 1,044 |
| Land and materials management | |||||
| Land used in mining activities (hectares) | 5,370 | 5,420 | 5,330 | 5,330 | 5,330 |
| Land used by plants, offices and equipment (hectares) 6 | 130 | 130 | 130 | 130 | 130 |
| Non-hazardous waste disposed (tonnes) 7 | 270 | 1,510 | 2,890 | 1,810 | 740 |
| Hazardous waste disposed (tonnes) 8 | 10 | 10 | 20 | 20 | 0 |
| Paper used (tonnes) | 4 | 8 | 8 | 10 | 10 |
| Paper recycled (tonnes) | 28 | 32 | 32 | 6 | 8 |
| Water 10 | |||||
| Total water intake (million m3) | 19 | 18 | 23 | 34 | 18 |
| Total water discharge (million m3) | 1 | 1 | 2 | 1 | 1 |
| Water consumption (million m3) 11 | 17 | 17 | 21 | 33 | 18 |
| Water consumption intensity ( m3/MWh) | 1.82 | 1.86 | 2.22 | 2.89 | 1.68 |
| Regulatory performance 31 | |||||
| Stack regulatory contraventions | 2 | 1 | 3 | 0 | 0 |
| General air regulatory contraventions | 2 | 0 | 0 | 0 | 7 |
| Spills to land regulatory contraventions | 0 | 1 | 3 | 1 | 6 |
| Spills to water regulatory contraventions | 1 | 4 | 3 | 3 | 0 |
| Other regulatory contraventions 12 | 1 | 0 | 3 | 1 | 2 |
| Administrative regulatory contraventions | 0 | 0 | 0 | 0 | 0 |
| Environmental enforcement actions 13 | 3 | 1 | 7 | 7 | 10 |
| PRODUCTION | |||||
| Coal generation net capacity (MW) | 1,340 | 1,340 | 1,340 | 1,405 | 1,304 |
| Natural gas generation net capacity (MW) | 0 | 201 | 457 | 303 | 303 |
| Hydro generation net capacity (MW) | 0 | 0 | 0 | 0 | 0 |
| Wind generation net capacity (MW) | 0 | 0 | 0 | 0 | 0 |
| Total net capacity (MW) | 1,340 | 1,541 | 1,797 | 1,708 | 1,607 |
| Coal net generation (MWh) | 9,554,000 | 9,050,000 | 9,274,000 | 11,037,000 | 10,396,000 |
| Natural gas net generation (MWh) | 0 | 47,000 | 258,000 | 415,000 | 239,000 |
| Hydro net generation (MWh) | 0 | 0 | 0 | 0 | 0 |
| Wind net generation (MWh) | 0 | 0 | 0 | 0 | 0 |
| Total net generation (MWh) | 9,554,000 | 9,097,000 | 9,532,000 | 11,452,000 | 10,635,000 |
| Capital expenditures on environmental monitoring and pollution abatement ($ millions) 18 | n/r | 68.00 | 54.90 | 0.30 | 0.00 |
| Operations and maintenance expenditures on environmental monitoring and pollution abatement ($ millions) 19 | n/r | 2.80 | 5.70 | 22.40 | 26.90 |
| SOCIAL PERFORMANCE | |||||
| Health and safety | |||||
| Health and safety enforcement actions 20 | 0 | 0 | 4 | 8 | 4 |
| Full-time equivalent employees 21 | 739 | 783 | 824 | 882 | 819 |
| EH&S full-time equivalent employees 22 | 18 | 17 | 12 | 20 | 18 |
| Injuries to employees | 20 | 30 | 23 | 18 | 15 |
| Employee injuries requiring absence from work | 2 | 7 | 5 | 3 | 3 |
| Employee recordable injury frequency rate (injuries/200,000 hours) 23 | 2.79 | 3.56 | 2.61 | 2.05 | 1.86 |
| Employee disabling injury frequency rate (injuries/200,000 hours) 24 | 0.28 | 0.83 | 0.57 | 0.34 | 0.37 |
| Injuries to contractors 25 | n/r | n/r | 7 | 0 | 0 |
| Contractor injuries requiring absence from work 25 | n/r | n/r | 0 | 0 | 0 |
| Contractor recordable injury frequency rate (injuries/200,000 hours) 23, 25 | n/r | n/r | 4.30 | 0.00 | 0.00 |
| Contractor disabling injury frequency rate (injuries/200,000 hours) 24, 25 | n/r | n/r | 0.00 | 0.00 | 0.00 |
| Short-term disability rate (days/1,000 employees) 26 | 9 | 438 | n/r | 621 | 648 |
| Long-term disability rate (cases/1,000 employees) 27 | 0 | 0 | 1.21 | 1.13 | 3.66 |
| Reportable vehicle incidents 28 | 3 | 0 | 1 | 3 | 0 |
| Health and safety training per employee (hours/employee) | 10 | 10 | 9 | 7 | 9 |
| Environmental training per employee (hours/employee) | 1 | 2 | 1 | 1 | 1 |
| Community relations | |||||
| Community investments ($ millions) 29 | 0.06 | 0.06 | 0.05 | 0.55 | 0.40 |
| Community investments per employee ($/employee) | 77 | 72 | 57 | 626 | 484 |
| Company-initiated volunteer hours per employee 30 | 1.3 | 1.2 | 1.6 | 2.0 | 1.6 |
Please see discussion and notes section for explanation.
* n/r= not reported