A pipeline was placed its first 50 km pass through the natural forest of Thong Pha Phum National Park and A1 classified watershed areas, and caused the forests within 20 metres corridor along a pipeline transect to be cleared out during the construction, therefore this disturbance could be impacted on local biodiversity. Replanting of native and exotic trees after clear cutting along a pipeline transect was conducted by PTT Public Company Limited (PTT) aiming to reduce the impacts of those activities