Company: TSLTF
Filing Date: 2025-12-12
Form Type: SUPPL
Source: 0001193125-25-317786
Chunk: 277

Company: TRANSALTA CORP
Filing Date: 2025-12-12
Form: SUPPL
Chunk 277
---
 adopted a target to fully reclaim this mine by 2040. Our Highvale mine in Alberta ceased operations on Dec. 31, 2021, when we discontinued coal-fired power generation in Canada. The mine reclamation of Highvale has been progressively executed as part of our regulatory approvals and our target is to have it fully reclaimed by 2046. In 2022, our reclamation team submitted our final reclamation plans. The updated plans align with community priorities

| TransAlta Corporation |     | 2024 Integrated Report |     | M121 |

Management’s Discussion and Analysis for the reclaimed land. In 2024, we continued contouring disturbed areas, re-establishingdrainage, replacing topsoil and subsoil, and advancing re-vegetationand land management. Our land use practices regarding previous mining activities incorporate progressive reclamation where the final end use of the land is considered at all stages of planning and development. To date, we have reclaimed approximately 5,000 hectares, which is equivalent to 40 per cent of land disturbed (12,500 hectares). Biodiversity The importance of environmental protection and biodiversity is outlined in our Environmental Policy as a corporate responsibility for TransAlta and a responsibility of each employee and contractor working on TransAlta’s behalf. In 2022, the Company adopted the target to “achieve zero biodiversity-related incidents”. This means zero biodiversity-related incidents that affected habitats and species included on the Red List of the IUCN from near threatened to critically endangered. The following table represents our biodiversity incidents in accordance with the IUCN Red List classification.

| Year ended Dec. 31             |     | 2024 |   |     | 2023 |   |     | 2022 |   |
|:-------------------------------|:----|:-----|--:|:----|:-----|--:|:----|:-----|--:|
| Critically endangered          |     |      | 0 |     |      | 0 |     |      | 0 |
| Endangered                     |     |      | 0 |     |      | 0 |     |      | 0 |
| Vulnerable                     |     |      | 0 |     |      | 0 |     |      | 0 |
| Near                           
 threatened                     |     |      | 0 |     |      | 0 |     |      | 0 |
| Total                          
 biodiversity-related incidents |     |      | 0 |     |