The joint decision by the Telangana government and Maharashtra’s Mahayuti coalition to form a technical committee to reassess the Tummidihetti barrage marks a turning point in the Godavari basin’s decades-long water dispute. By pitching for a Full Reservoir Level (FRL) of 152 metres—surpassing the 148-metre cap agreed upon in 2016—Chief Minister A. Revanth Reddy has revived the original design of the undivided Andhra Pradesh era. The move tests interstate hydrologic diplomacy, engineering realities, and high-stakes political narratives.
Geographic Location: Confluence of Pranahita
The proposed barrage sits across the Pranahita River near Tummidihetti village in Koutala Mandal, situated in the Kumuram Bheem Asifabad district (part of erstwhile composite Adilabad) of Telangana, bordering Maharashtra's Gadchiroli district. The Pranahita is formed by the confluence of the Penganga, Wardha, and Wainganga rivers. Because it gathers heavy monsoon runoff from central India before discharging into the Godavari, it accounts for nearly a third of the Godavari's total basin yield.
Origin and Historic Milestones
The project began as the centerpiece of the Dr. B.R. Ambedkar Pranahita-Chevella Sujala Sravanthi Project, conceived in 2007–2008 by the Congress government led by Y.S. Rajasekhara Reddy.
2008: The unified Andhra Pradesh government laid the foundation stone for the ambitious ₹38,500-crore project, designed to divert 160 TMC (Thousand Million Cubic Feet) of water to irrigate 16.4 lakh acres across seven Telangana districts.
2008–2014: Canals and preliminary work commenced on the Telangana side, but key interstate clearances stalled due to objections raised by Maharashtra over territorial submergence. August 2016: Following the bifurcation of the state, the BRS government led by K. Chandrashekar Rao signed a bilateral agreement with Maharashtra Chief Minister Devendra Fadnavis, agreeing to lower Tummidihetti’s FRL to 148 metres.
October 2026: Telangana Chief Minister Revanth Reddy met Maharashtra Deputy CM Devendra Fadnavis, urging a rethink to restore the height to 152 metres, leading to the formation of a joint technical panel.
Hydrology: Water Flows at Tummidihetti
Hydrologic estimates at Tummidihetti have seen contrasting assessments:
Central Water Commission (CWC) Studies: The CWC assessed gross availability at the barrage site at roughly 165 TMC at 75% dependability. However, this included approximately 63 TMC from upstream surpluses of Maharashtra and Madhya Pradesh, which CWC noted could diminish as upstream states build out their allocated utilization.
The FRL 152 m vs. 148 m Divide: At 152 metres, hydrologists estimated that about 110 to 120 TMC could be diverted within a 90-day monsoon window. At 148 metres, divertible yield drops steeply to around 44 TMC to 60 TMC, rendering extensive gravity-fed networks toward downstream districts unviable.
Why Maharashtra Objected?
Maharashtra’s resistance is driven by topography: Heavy Submergence at 152 m: A reservoir crest of 152 metres backs water up through the river plains of Gadchiroli, submerging an estimated 3,700 to 4,500 acres of land, including agricultural holdings and village habitats.
Ecological & Tribal Concerns: The submergence zone involves reserve forest corridors and Scheduled Tribe settlements in remote Vidarbha. Facing local tribal resistance and compensation liabilities, Maharashtra insisted that backwaters remain within natural river embankments, which led to the 148-metre FRL restriction.
Why Did the Congress Fail to Build It Before 2014?
Between 2008 and 2014, the unified Congress government faced multiple operational hurdles:
Lack of Interstate Accord: Despite Congress holding power simultaneously in New Delhi, Andhra Pradesh, and Maharashtra (under the Congress-NCP coalition), Maharashtra refused to compromise on land inundation in Vidarbha.
Backwards Engineering Approach: The Andhra Pradesh administration executed extensive canal excavation inland before securing central wildlife, environmental, and interstate clearance for the headworks at Tummidihetti.
Political Distraction: The sudden death of YSR in 2009 and the intense political agitation for Telangana statehood grounded major interstate infrastructure decisions.
Why KCR Replaced Tummidihetti with Kaleshwaram
Faced with Maharashtra's cap of 148 metres—which yielded only 44–60 TMC—the BRS administration argued that investing thousands of crores for limited yield was unviable. KCR redesigned the system using LiDAR surveys and shifted the primary intake point roughly 100 km downstream to Medigadda (Kaleshwaram), below the confluence of the Pranahita and Godavari rivers. At Medigadda, water availability expanded to over 280 TMC, supported by a broader drainage basin.
The trade-off was operational cost: instead of gravity-dominated flow, Kaleshwaram required a multi-stage lift system of mega pump houses (Medigadda, Annaram, Sundilla, and Yellampalli) that demanded substantial electricity supply.
Revanth’s Counter-Offensive: Politics or Engineering?
The Congress push to revive Tummidihetti follows significant damage at the Kaleshwaram project: The Medigadda Damage & Scrutiny: In October 2023, Pier 20 of Block 7 at Medigadda sank, followed by distress reports at Annaram. A National Dam Safety Authority (NDSA) inquiry and judicial commission investigations raised structural integrity concerns, bringing the previous administration’s flag-bearer project under scrutiny.
The Congress administration has used the issues at Kaleshwaram to highlight ballooning costs and structural risks under BRS. Reviving Tummidihetti serves as an institutional return to the party's original 2008 vision, framed as a cleaner alternative.
Can Gravity Transfer Water Without Storage?
The central technical debate rests on whether water can flow by pure gravity without sufficient head storage.
The Hydrodynamic Limits: If Maharashtra sticks to 148 metres, gravity conveyance into Telangana’s interiors is limited. At 148 metres, the barrage functions essentially as a diversion weir with negligible pondage; water must either be pumped into upland canals or restricted to local irrigation in the northern reaches of Adilabad (around 2 lakh acres).
The 150–152 m Alignment: A barrage height of 150–152 metres provides the hydraulic head required to push water through proposed tunnels and linking canals toward Sundilla and Yellampalli by gravity. Unless the newly appointed joint technical committee finds engineering solutions—such as protective bunds and flood-retaining dikes to stop submergence in Gadchiroli—or Maharashtra accepts compensated inundation, full-scale gravity transfer remains tied to resolving this upstream boundary constraint.