Overview
Wonorejo Dam is an operational hydroelectric powerplant located in the Pagerwojo district of Tulungagung Regency, East Java Province, Indonesia. Situated at the foot of Mount Wilis, the facility is positioned approximately 12 kilometers from downtown Tulungagung. The dam serves as a critical piece of energy infrastructure, generating electricity with an installed capacity of 6.5 MW. In addition to its role in power generation, the structure functions as a major irrigation hub, supporting agricultural productivity in the surrounding region. The reservoir holds a water capacity of around 122 million cubic meters, making it one of the largest dams in Indonesia.
Location and Geography
The dam's strategic location in East Java places it within a significant agricultural and hydrological zone. Its position at the base of Mount Wilis allows for effective water catchment and storage. The proximity to Tulungagung town facilitates logistical access and integration with local distribution networks. The geographic setting underscores the importance of water resource management in the Indonesian archipelago, where topography plays a key role in hydroelectric potential.
Operational History
Wonorejo Dam was commissioned in 2001. The official inauguration took place on June 21, 2001, presided over by Megawati Sukarnoputri, who served as the Vice President of Indonesia at that time. This event marked the formal integration of the facility into the national energy and irrigation infrastructure. Since its commissioning, the dam has maintained an operational status, contributing to the regional power supply and water management systems. The operator of the facility is, though its continued operation highlights its enduring utility in the East Java energy landscape.
Geography and Location
The facility occupies a strategic geographic position at the foot of Mount Wilis, a prominent volcanic feature that defines the local topography and hydrological catchment area. This placement allows the dam to effectively harness water resources flowing from the mountainous terrain, supporting its function as a major hydroelectric and water management infrastructure project in the region.
The dam is located approximately 12 kilometers from the downtown area of Tulungagung, making it a relatively accessible landmark for both operational monitoring and regional water distribution logistics. The proximity to the urban center of Tulungagung underscores the dam’s importance to the local economy and municipal water supply, while its elevation at the base of Mount Wilis provides natural gravitational advantage for water flow and storage efficiency.
Geographic Context
| Geographic Attribute | Detail |
|---|---|
| Country | Indonesia |
| Province | East Java |
| Regency | Tulungagung |
| District | Pagerwojo |
| Topographic Feature | Foot of Mount Wilis |
| Distance from Downtown Tulungagung | 12 kilometers |
The location at the foot of Mount Wilis is critical to the dam’s hydrological performance. Mount Wilis serves as a significant watershed for the surrounding area, channeling rainfall and runoff into the reservoir. This natural catchment system contributes to the dam’s substantial storage capacity, which is cited as around 122 million cubic meters, making it one of the largest dams in Indonesia by volume. The geographic setting ensures consistent water inflow, particularly during the wet seasons, which supports both hydroelectric generation and irrigation needs in East Java.
The 12-kilometer distance from downtown Tulungagung places the dam within a semi-rural landscape that balances agricultural land use with natural forest cover from the mountain slopes. This location minimizes land acquisition conflicts while maximizing the reservoir’s surface area and depth. The Pagerwojo district itself benefits directly from the dam’s presence, with improved water security for local agriculture and potential for eco-tourism due to the scenic mountain backdrop.
Construction and Financing
The Wonorejo Dam is situated on the Gondang River within the Pagerwojo district of Tulungagung Regency, East Java Province. Construction of the dam was a significant infrastructure project aimed at enhancing regional water management and hydroelectric power generation in Indonesia. The project was financed through a loan from the Overseas Economic Cooperation Fund (OECF), a key mechanism for funding major infrastructure developments in the country during that period.
Construction activities culminated in the early 2000s, leading to the official inauguration of the facility. This event marked the operational commencement of the dam, which features a storage capacity of around 122 million cubic meters. The Wonorejo Dam is recognized as one of the largest dams in Indonesia, playing a crucial role in the region's hydroelectric power output with a capacity of 6.5 MW.
Construction Timeline
| Year | Event |
|---|---|
| 2001 | Inauguration of the Wonorejo Dam by Vice President Megawati Sukarnoputri on June 21. |
Financial Details
| Financing Source | Details |
|---|---|
| Overseas Economic Cooperation Fund (OECF) | Primary loan financing for the construction of the Wonorejo Dam. |
The completion of the Wonorejo Dam represents a milestone in Indonesia's hydroelectric infrastructure, combining significant water storage capabilities with power generation. The facility's location on the Gondang River and its proximity to Mount Wilis provide strategic advantages for water resource management in the East Java region. The involvement of the OECF highlights the international financial support that facilitated the project's development, ensuring its status as a major dam in the country.
Hydroelectric Power Generation
The Wonorejo Dam functions as a significant hydroelectric power generation facility within the East Java Province of Indonesia. The installed capacity of the hydropower plant is 6.5 MW, providing a steady output of renewable energy to the regional grid (per operational data). This capacity is derived from the water resources stored in the dam's reservoir, which has a total storage capacity of around 122 million cubic meters. The integration of hydroelectric generation allows the facility to contribute to the energy mix in the Tulungagung Regency and the broader Pagerwojo district area.
Operational Context and Regional Impact
The hydroelectric plant became operational following the inauguration of the dam on June 21, 2001. The inauguration was conducted by Megawati Sukarnoputri, who served as the Vice President of Indonesia at that time. The location of the dam at the foot of Mount Wilis, approximately 12 kilometers from downtown Tulungagung, provides a strategic elevation and water flow suitable for power generation. The 6.5 MW output serves as a baseline for the local energy supply, reducing reliance on thermal power sources in the immediate vicinity.
As one of the largest dams in Indonesia, the Wonorejo Dam's hydroelectric component plays a dual role in water management and energy production. The 122 million cubic meter capacity ensures consistent water availability for the turbines, supporting the 6.5 MW generation capability throughout varying seasonal flows. The facility is currently classified as operational, indicating continuous contribution to the regional power infrastructure (per operational status data). The energy generated supports local municipalities and industrial activities in the East Java Province, leveraging the natural topography of the Mount Wilis foothills.
The operator of the facility is not explicitly specified in the primary cited sources, though the management falls under the administrative jurisdiction of the Tulungagung Regency. The hydroelectric generation represents a key renewable energy asset in the region, utilizing the water resource efficiently for both irrigation and power. The 6.5 MW capacity, while modest in national terms, provides critical baseload power for the local grid, enhancing energy security for the surrounding communities. The dam's strategic location and substantial storage capacity ensure that the hydroelectric plant can maintain consistent output, contributing to the stability of the local energy infrastructure.
Irrigation and Water Supply
The Wonorejo Dam serves as a critical multi-purpose infrastructure asset for the Tulungagung Regency, primarily functioning to enhance regional agricultural productivity and secure municipal water supplies. Located in the Pagerwojo district at the foot of Mount Wilis, the dam’s strategic position allows for efficient gravity-fed distribution to surrounding communities and farmlands. With a total storage capacity of approximately 122 million cubic meters, the reservoir provides a substantial buffer against seasonal variability in rainfall, which is particularly important in the East Java Province. This volume of stored water ensures consistent flow regulation, reducing the vulnerability of local economies to both droughts and flash floods, thereby stabilizing the hydrological environment for downstream users.
Agricultural Irrigation Support
A primary function of the Wonorejo Dam is the irrigation of agricultural land, which is vital for the economic stability of the region. The dam supports approximately 7540 hectares of agricultural land, providing a reliable water source for crops throughout the growing seasons. This extensive irrigation network helps to maximize crop yields and allows for more intensive farming practices in the Tulungagung area. By ensuring a steady supply of water to these fields, the dam reduces the dependence on erratic rainfall patterns, which can often lead to significant fluctuations in harvest quality and quantity. The ability to irrigate such a large area underscores the dam’s importance in the broader food security strategy of East Java, supporting local farmers and contributing to the regional economy.
Municipal Water Supply
In addition to its agricultural role, the Wonorejo Dam plays a crucial part in the municipal water supply system for the local population. The dam provides drinking water at a rate of 8.02 cubic meters per second, ensuring a consistent flow to treatment facilities and distribution networks. This steady discharge rate is essential for meeting the daily water demands of residents in Tulungagung and surrounding areas, which are located approximately 12 kilometers from the dam. The provision of potable water from the reservoir helps to improve public health standards and supports the growing needs of the urban and semi-urban populations in the regency. The integration of both irrigation and water supply functions makes the Wonorejo Dam a key component of the local infrastructure, balancing the needs of agriculture and domestic consumption efficiently.
Flood Control and Regional Infrastructure
The Wonorejo Dam serves as a critical component of the regional hydrological management system in East Java, specifically designed to mitigate flood risks in the Tulungagung Regency. Located in the Pagerwojo district at the foot of Mount Wilis, the facility manages water flow from the surrounding catchment areas to prevent downstream inundation. The dam’s storage capacity of 122 million cubic meters allows for significant retention of runoff during peak rainfall seasons, thereby reducing the hydraulic pressure on the main river channels that traverse the urban center of Tulungagung, situated approximately 12 kilometers away.
Integration with the Neyama Tunnel
The effectiveness of the Wonorejo Dam in flood control is significantly enhanced by its operational synergy with the Neyama Tunnel, located in the Besuki District. This infrastructure network represents a coordinated approach to water management in the region, where the dam acts as the primary storage and regulation point, while the tunnel facilitates the efficient conveyance of excess water. The Neyama Tunnel helps to divert flow away from vulnerable low-lying areas, ensuring that the combined system can handle both gradual accumulation and sudden surges in water volume.
This integrated infrastructure was inaugurated on June 21, 2001, by Megawati Sukarnoputri, who served as the Vice President of Indonesia at the time. The commissioning of these facilities marked a significant milestone in the regional development of East Java, providing not only flood protection but also supporting agricultural and domestic water supply needs. The dam is recognized as one of the largest dams in Indonesia, underscoring its importance to the local and provincial infrastructure landscape.
By combining the storage capabilities of the Wonorejo Dam with the conveyance efficiency of the Neyama Tunnel, the region has established a robust defense against flooding. This system protects the economic and residential areas of Tulungagung, ensuring stability for the local population and supporting the broader economic activities in the East Java Province. The operational status of the dam remains active, continuing to play a vital role in the region's water resource management and flood mitigation strategies.
Tourism and Regional Development
The Wonorejo Dam has evolved into a significant tourism destination within the Tulungagung Regency, leveraging its substantial infrastructure and scenic location at the foot of Mount Wilis. With a storage capacity of 122 million cubic meters, the dam is recognized as one of the largest dams in Indonesia, offering a visual landmark that draws visitors to the Pagerwojo district. The site is situated approximately 12 kilometers from downtown Tulungagung, providing a relatively accessible retreat for residents and tourists seeking natural landscapes combined with engineering scale. The inauguration of the dam on June 21, 2001, by Vice President Megawati Sukarnoputri marked a milestone in the region’s development, establishing the reservoir as a central feature of local identity and economic activity.
Integration with Regional Tourism
Wonorejo Dam functions as a key node in the broader tourism circuit of East Java, often visited in conjunction with other regional attractions such as Popoh Beach. This connectivity encourages multi-day itineraries that combine coastal and highland experiences, enhancing the overall appeal of Tulungagung for domestic travelers. The dam’s operational status and maintained infrastructure support recreational activities, although specific water-based uses are governed by its primary role as a hydroelectric powerplant with a capacity of 6.5 MW. The presence of the dam contributes to the local economy by attracting visitors who spend on local services, transportation, and accommodations in the surrounding areas.
Accommodation and Facility Development
The growth of tourism around the Wonorejo Dam has spurred the development of accommodation facilities to cater to increasing visitor numbers. One notable example is the Swa-Loh Resort, which has emerged as a lodging option for tourists wishing to extend their stay near the reservoir. The establishment of such facilities reflects a strategic effort to capitalize on the dam’s scenic value and its proximity to Mount Wilis. These developments aim to provide comfort and convenience, thereby enhancing the visitor experience and encouraging repeat tourism. The integration of hospitality infrastructure near the dam supports the broader regional development goals of Tulungagung Regency, linking natural assets with economic opportunities.
Why it matters
The Wonorejo Dam holds significant strategic value within the energy and water infrastructure landscape of East Java Province, Indonesia. Recognized as one of the largest dams in the country, its scale is defined by a substantial water storage capacity of around 122 million cubic meters. This volumetric capacity is critical for regional water security, enabling the dam to serve multiple functional roles beyond its primary designation as a hydroelectric power plant. The facility contributes to the regional power grid with an installed capacity of 6.5 MW, providing a steady source of renewable energy derived from water flow. While the specific operator is not detailed in the primary cited sources, the plant has maintained an operational status since its commissioning in 2001.
Regional Impact and Multi-Functional Utility
The significance of the Wonorejo Dam extends into agriculture, flood management, and local geography. This specific geographical positioning allows the infrastructure to effectively capture and regulate water resources from the surrounding highlands. The large reservoir volume supports irrigation networks for agricultural lands in the Tulungagung Regency, ensuring water availability for crops during dry seasons. Additionally, the dam plays a vital role in flood mitigation, managing water discharge to protect downstream communities in East Java from seasonal flooding. The inauguration of the dam on June 21, 2001, by Vice President Megawati Sukarnoputri marked a key milestone in the region's development, underscoring its importance to the local and national infrastructure strategy. The facility remains a critical asset for the multi-sectoral utility of water resources in Indonesia.
See also
- Landfill gas for energy: its status and prospect in Indonesia
- Bhakra Dam: Engineering, History and Regional Impact
- Chutak Hydroelectric Plant: Engineering and Operations
- Hoover Dam Visitor Center
- Shuakhevi Hydro Power Plant: Engineering, Finance and Regional Impact