In the 1920s, these were the years when the Miri field began to decline. Exploration was carried out further and further afield. In 1926 an exploratory team had gone as far as Padang Barawa between the Sungai Seria and Sungai Barawa. Not much attention was paid to their findings then, but now with the Miri field declining the old maps and charts were taken out and studied again.
On Saturday, 6th September 1997, flight BI238, a Dornier 228-212 operating for Royal Brunei Airlines leased from Merpati Intan which plied the Labuan - Bandar Seri Begawan - Miri route on a regular basis, crashed in Lambir Hills.