WIKA Signs Contract for CWIP-03 Nipah Kuning B Project, Repair Pontianak Sanitation System
JAKARTA - 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 Pontianak City, West Kalimantan Province (Kalbar).
The CWIP-03 Nipah Kuning B project aims to build a domestic wastewater piping network that functions to collect and channel waste from households and commercial areas to the Domestic Wastewater Treatment System (IPALD) to be safely treated before being discharged into bodies of water.
The existence of this system plays a strategic role in preventing pollution of the Kapuas River and the city's ditch network, maintaining the quality of PDAM raw water and improving the health status of the Pontianak City community.
WIKA President Director Agung Budi Waskito explained that the scope of work for the CWIP-03 Nipah Kuning B Package includes the installation of RCP jacking pipes with a diameter of 1,000, 600 and 450 millimeters (mm) along 1.77 kilometers (km); PVC jacking pipes with a diameter of 200-300 mm along 2.00 km; PVC open trench method along 20.00 km; house network along 9.95 km; construction of 459 manhole units; 3,200 house inlet units; and 1,400 house connections.
"This package is part of five integrated sanitation work packages which include the construction of the Nipah Kuning and Martapura IPALD as well as the piping network in several other service zones," said Agung Budi as quoted from a written statement, Friday, January 16.
In its implementation, WIKA faces technical challenges typical of the Pontianak region, such as peat soil conditions with low bearing capacity, high groundwater levels, the risk of flash floods, very flat topography, and work in densely populated areas with complex underground utilities.
To answer this challenge, the company also applies a combination of pipe jacking (microtunneling) and open cut construction methods that are tailored to the characteristics of the location and network function.
As a form of innovation, WIKA implements the use of precast base manholes in open cut areas to ensure the quality of the structure in the middle of high groundwater conditions and utilizes Geographic Information System (GIS) technology to monitor the progress of pipe and manhole installation in real time based on geospatial.
The implementation of this innovation supports time efficiency, cost control, and continuous improvement of work quality.
With the signing of the new contract for the CWIP-03 Nipah Yellow B Project, said Agung Budi, his party is optimistic that it can provide a reliable, hygienic and sustainable sanitation solution for the City of Pontianak.
"As well as making a real contribution to national development that is oriented towards the welfare of the people and environmental sustainability," he added.