JAKARTA, KOMPAS.com - The Ministry of Public Works and Public Housing (PUPR) has resumed the construction of the Wanggar Dam in Nabire Regency, Papua. Previously, construction work on the Wanggar Weir had stopped in 2021.
PUPR Minister Basuki Hadimuljono said the Wanggar Weir was built to irrigate 3,200 hectares of agricultural land in Nabire Regency.
According to him, the construction of the Wanggar dam is also an effort to take advantage of the potential for high rainfall in the area.
"Papua Island has the greatest water potential of all parts of Indonesia because of the highest rainfall. Therefore, we prioritize the management of natural resources in Papua for the development of small agricultural irrigation," said Basuki in his statement, Tuesday (4/5/2022).
The Wanggar Weir has been built in stages since 2019 starting with sheet pile piling, 845 meter cofferdam construction for the construction of the weir body, upstream floor work and inspection bridge pillar construction.
In 2020, the construction of the Wanggar Weir will continue with the work of laying sheet piles on the right and left cold treads, erecting 30 cm diameter piles, and making the right and left wall treads upstream of the weir.
The development plan for FY 2022 includes floor work downstream of the weir, right and left walls downstream of the weir, right wall upstream of the weir, and work on the lighthouse of the weir with a budget requirement of Rp 74.9 billion.
Furthermore, in FY 2023, it is also planned to complete the work on the cofferdam, the upstream left upright wall and the sloping wall (wing) of the weir, sandtrap, inspection bridge, dam covering the weir, primary network and irrigation structures up to the tap.
The total budget requirement for FY 2023 work is estimated to be around Rp. 251.1 billion. Weir Wanggar is designed with the type of Fixed Weir with a round crest as high as 2.5 meters. Weir construction in the form of reinforced concrete with a maximum height of 44.24 meters.
This 199 meter wide weir has a right intake capacity of 4.68 cubic meters per second and a Q100 design discharge of 2,582 cubic meters per second.
Wanggar is one of the districts in Nabire Regency with the potential for agricultural area not being optimally maximized by the irrigation system, land use currently relies on the rainy season. The location of the Wanggar Dam is about 42 kilometers from the center of Nabire City with a travel time of about 1 hour and 15 minutes.