PT Wijaya Karya (Persero) Tbk (WIKA) has officially signed a new contract for the implementation of the Citywide Inclusive Sanitation Program (CWIP) Package 03 Nipah Kuning B in the city of Pontianak. The signing of this contract reaffirms WIKA's commitment to supporting the acceleration of sustainable urban sanitation infrastructure development that is adaptive to the geographical conditions of wetlands.
The CWIP-03 Nipah Kuning B project aims to build a domestic wastewater piping network that collects and channels waste from households and commercial areas to the Domestic Wastewater Treatment System (IPALD) for safe treatment before being discharged into water bodies. This system plays a strategic role in preventing pollution of the Kapuas River and the city's canal network, maintaining the quality of PDAM's raw water, and improving the health of the people of Pontianak City.
The scope of work for Package CWIP-03 Nipah Kuning B includes the installation of 1,770 meters of 1000, 600, and 450 mm diameter RCP jacking pipes; 2,000 meters of 200–300 mm diameter PVC jacking pipes; 20,000 meters of PVC pipes using the open trench method; a 9.95 km long residential network; the construction of 459 manholes; 3,200 house inlets; and 1,400 house connections. This package is part of five integrated sanitation work packages that include the construction of the Nipah Kuning and Martapura IPALD and piping networks in several other service zones.
This project reflects the Company's strategic role in supporting the national development agenda. "The signing of the CWIP-03 Nipah Kuning B contract is a manifestation of trust in WIKA to provide reliable and sustainable sanitation infrastructure. We are committed to prioritizing quality, innovation, and timely implementation, while ensuring direct benefits for public health and environmental sustainability in the city of Pontianak," said Agung Budi Waskito (BW), President Director of WIKA.
In its implementation, WIKA faced technical challenges specific to the Pontianak region, such as low-bearing peat soil conditions, high groundwater levels, tidal flooding risks, extremely flat topography, and work in densely populated areas with complex underground utilities. To address these challenges, WIKA applied a combination of pipe jacking (microtunneling) and open cut construction methods tailored to the characteristics of the location and the function of the network.
As a form of innovation, WIKA implemented the use of precast base manholes in open cut areas to ensure structural quality amid high groundwater levels, and utilized Geographic Information System (GIS) technology to monitor the progress of pipe and manhole installation in real time based on geospatial data. The application of these innovations supports time efficiency, cost control, and continuous improvement in work quality.
In line with Asta Cita, particularly in promoting equitable basic infrastructure development, improving public health, and strengthening environmentally-based sustainable development, the CWIP-03 Nipah Kuning B Project is an important part of efforts to create a healthy, inclusive city that is resilient to climate change. Through this project, WIKA actively supports the transformation of national sanitation services while strengthening urban environmental resilience in wetland areas.
With the signing of the new contract for the CWIP-03 Nipah Kuning B Project, WIKA is optimistic that it can provide reliable, hygienic, and sustainable sanitation solutions for the city of Pontianak, as well as make a real contribution to national development that is oriented towards the welfare of the people and environmental sustainability.