Water Lifeline for Hyderabad · Mugger Crocodile Sanctuary · Important Bird Area
Manjeera Dam, Sangareddy District, Telangana
The Manjeera Dam (also known as the Manjeera Barrage) is a vital water regulation structure built across the Manjeera River—a major right-bank tributary of the Godavari River. Located roughly 7 kilometers from Sangareddy town and about 50 kilometers from Hyderabad, the dam forms a key chapter in the region's modern water management and ecological conservation history.
Purpose and Strategic Utility
Following the reorganization of states in 1956, the water of the Manjeera basin was distributed across Maharashtra, Karnataka, and Telangana. To meet the rapidly burgeoning urban demands of the twin cities, the Hyderabad Metro Water Supply and Sewerage Board (HMWSSB) initiated systematic diversions of the river.
The Manjeera Dam was constructed primarily as a dedicated drinking water source to feed the pipelines of:
- Hyderabad
- Secunderabad
- Neighboring areas within the Medak and Sangareddy regions
Project Phases & Expansion Timeline
The Manjeera Drinking Water Supply Project was developed in multiple phases to progressively augment water supply to the Hyderabad metropolitan region. The project includes the Manjeera Barrage and the upstream Singur Dam, working in tandem to regulate water flow and ensure year-round supply.
| Phase | Structure | Year | Capacity (MGD) | Notes |
|---|---|---|---|---|
| Phase 1 | Manjeera Barrage | 1965 | 68/15 | Initial commissioning of the Manjeera Barrage |
| Phase 2 | Manjeera Barrage | 1981 | 136/30 | Expansion of the Manjeera Barrage system |
| Phase 3 | Singur Dam | 1991 | 136/30 | Upstream Singur Dam commissioned |
| Phase 4 | Singur Dam | 1993 | 136/30 / 137/30 | Further expansion of the Singur Dam system |
| Total from Present Sources | 682 | Combined capacity across all phases | ||
Ecological Turning Point: The Crocodile Recovery
The construction of the dam and its subsequent reservoir inadvertently created a unique wetland habitat that triggered an important conservation milestone in the late 1970s.
By 1974, the native Mugger Crocodile (Crocodylus palustris) population along the Manjeera River had collapsed due to environmental pressures, leaving a critically low count of just four breeding pairs.
To halt their extinction, a 20-square-kilometer riverine stretch located directly between the Singur and Manjeera dams was formally declared a protected area—the Manjeera Wildlife Sanctuary.
Capitalizing on the stable backwaters created by the reservoir, conservationists established a crocodile-breeding and rehabilitation center. Today, the population has successfully rebounded to an estimated several hundred crocodiles.
Environmental Legacy
The man-made reservoir created by the Manjeera Dam has evolved into an Important Bird Area (IBA). The reservoir features an ecosystem of open water, riverine vegetation, and nine small marshy islands (such as Puttigadda and Bapangadda).
Mugger Crocodile Sanctuary
The Manjeera Wildlife Sanctuary is now a successful model of crocodile rehabilitation, protecting the native Mugger Crocodile and its wetland habitat.
Important Bird Area
With over 250 bird species, the reservoir is a paradise for birdwatchers and a critical stopover point for migratory birds along the Central Asian Flyway.
Location
The dam is located roughly 7 kilometers from Sangareddy town and about 50 kilometers from Hyderabad. It is easily accessible by road and makes for a pleasant day trip, offering opportunities for birdwatching, nature walks, and environmental education.
Significance
Manjeera Dam is a cornerstone of Hyderabad's drinking water infrastructure, supplying millions of residents and supporting the region's rapid urban growth.
Along with the Singur Dam, it plays a critical role in regulating seasonal flows and reducing monsoon flood risks downstream.
The dam and its surrounding sanctuary offer a rare combination of water management, wildlife conservation, and ecotourism, attracting researchers, birdwatchers, and nature enthusiasts.
Legacy – A Living Reservoir of Water and Wildlife
The Manjeera Dam is far more than an engineering structure; it is a lifeline for millions and a beacon of conservation success. From rescuing the Mugger Crocodile from the brink of extinction to creating a vital wetland for migratory birds, the dam exemplifies how human infrastructure can coexist with and even support ecological recovery.
- Location: 7 km from Sangareddy, 50 km from Hyderabad.
- Primary Purpose: Drinking water supply for Hyderabad and Secunderabad.
- Project Phases: Four phases from 1965 to 1993, with a combined capacity of 682 MGD.
- Ecological Milestone: Established as a crocodile sanctuary in 1978.
- Conservation Success: Crocodile population recovered from 4 breeding pairs to several hundred.
- Biodiversity: Important Bird Area with over 250 species and 9 marshy islands.
- Integration: Works in tandem with the Singur Dam for flood control and water regulation.
- Telangana Tourism – Manjeera Reservoir
- Hyderabad Metro Water Supply and Sewerage Board (HMWSSB) – Project Records.
- ResearchGate – Manjeera Basin Water Distribution Studies.
- Wikipedia – Manjeera River, Singur Dam.
- Government of Telangana – Irrigation and Water Resources Department.
The Manjeera Dam is a testament to thoughtful water management and the remarkable resilience of nature when given the chance to recover.