Many Kampong Ayer residents relocated to various parts of the country, such as Muara, when a coal mining industry developed there.

The strategic location of Kampong Kuala Tutong as a trading hub at the time encouraged him to settle there permanently.

The bantun service, with boats named Higgins, Pemancha, and Semaun, charged a fare of B$5.00 per vehicle.

The school's name was chosen in honour of then-Crown Prince (Pengiran Muda Mahkota) Hassanal Bolkiah.

As the number of congregants increased, a mosque was built in 1988 near the existing surau, funded by donations from the villagers and the government.

On 21 May 1993, a new mosque was built on a 0.60 acres (0.24 ha) plot of land, located about 5 kilometres (3.1 mi) from Tutong town, and its construction was completed on 4 November 1993.

After the road connection between Kampong Penabai and Pekan Tutong was established, most villagers began performing Friday prayers at Hassanal Bolkiah Mosque.

[11] The grave of Antah Kamis is located in Kampong Penabai, and is believed to be sacred due to a series of unusual events.

In the 1960s, during a village fire, the grave remained untouched, leading to local belief in its mystical properties.

The family of Antah Kamis maintains the site, replacing a wooden shelter over the grave three times, and annually cleaning and reading prayers for it during Ramadan.