The Polavaram Project is a multi-purpose dam and irrigation initiative on the Godavari River near Ramayyapeta village in Polavaram Mandal, Andhra Pradesh, India, approximately 34 kilometers upstream from the Sir Arthur Cotton Barrage at Dowleswaram, intended to harness the river's flow for irrigation, hydroelectric power generation, and water supply.[1][2] The project features an earth-cum-rockfill dam with a spillway capable of discharging 3,600,000 cubic feet per second across 44 vents spanning 2,310 meters, creating a reservoir with gross storage of 194 thousand million cubic feet (tmcft) and live storage of 75.2 tmcft at full supply level.[3] It aims to develop a gross irrigation potential of 436,825 hectares through extensive canal networks, including a 182-kilometer left main canal irrigating 161,900 hectares in East Godavari and Visakhapatnam districts, while also generating 960 megawatts of hydropower via 12 Kaplan turbine units of 80 MW each.[1][2][4]Declared a national project under Section 90(1) of the Andhra Pradesh Reorganisation Act, 2014, the initiative supports water transfer to upland areas and integration with broader river-linking efforts, providing drinking water to urban centers and stabilizing delta agriculture against drought variability.[5][6] As of October 2025, construction advances toward completion by December 2027, with the diaphragm wall targeted for finish by year-end and the left main canal operational by January 2026 to enable initial water flows.[7][8]Notable achievements include the adoption of advanced engineering like automated tunneling for underground works and real-time structural monitoring to mitigate seepage risks in the permeable foundation strata, setting records in large-scale hydro construction efficiency.[9][10] However, the project has faced delays from geological challenges, funding constraints post-2014 state bifurcation, and interstate disputes over water allocation with Telangana and Odisha.[11]Controversies center on displacement affecting approximately 98,818 families, predominantly tribal communities in East and West Godavari districts, alongside submersion of archaeological sites and forests, raising empirical concerns about biodiversity loss and downstream ecological shifts from altered hydrology.[12][13] Rehabilitation efforts persist amid reports of inadequate resettlement, though official mechanisms prioritize land-for-land compensation under national guidelines.[12] Environmental assessments highlight potential for increased erosion and habitat fragmentation, underscoring trade-offs between regional development gains and localized impacts verifiable through pre- and post-impoundment monitoring data.[14][15]
Background and Overview
Geographical and Strategic Context
The Polavaram Project is located on the Godavari River near Ramayyapeta village in Polavaram mandal, West Godavari district, Andhra Pradesh, approximately 42 kilometers upstream from the Sir Arthur Cotton Barrage at Dowleswaram.[2] The Godavari, India's second-longest river at 1,465 kilometers, originates in the Western Ghats of Maharashtra and traverses Telangana before entering Andhra Pradesh, draining a basin spanning 312,812 square kilometers across Maharashtra (48.6%), Telangana (18.8%), Andhra Pradesh (4.5%), Chhattisgarh (10.9%), and Odisha.[16] The project's dam site lies in a geologically stable region within the Eastern Ghats, where the river flows through hilly terrain, facilitating reservoir formation with backwater effects extending into upstream areas of Telangana, Odisha, and Chhattisgarh.[17]Strategically, the project serves as a linchpin for inter-basin water transfer, enabling diversion of approximately 80 thousand million cubic feet (TMC) of surplus Godavari water to the Krishna River basin to irrigate drought-prone regions in Andhra Pradesh and support industrial needs.[18] Designated a national project by the Government of India in 2014, it addresses post-bifurcation water scarcity in Andhra Pradesh while generating up to 960 megawatts of hydroelectric power and providing flood control through reservoir storage.[19] Its upstream position relative to major tributaries like the Indravati and Sabari allows capture of monsoon flows, but submergence of over 300 villages across four states has sparked inter-state disputes over rehabilitation and water rights, highlighting tensions in riparian resource allocation.[17]The initiative aligns with broader national goals of river interlinking under the National River Linking Project, positioning Polavaram as a critical node for enhancing agricultural productivity—potentially irrigating 1.2 million hectares—and ensuring drinking water for urban centers like Visakhapatnam, amid competing claims from basin states.[19] This strategic centrality underscores its role in balancing ecological impacts, such as potential siltation in the Godavari delta, against developmental imperatives in a water-stressed peninsula.[20]
Primary Objectives and National Importance
The Polavaram Project serves as a multi-purpose initiative on the Godavari River, with core objectives centered on expanding irrigation coverage, generating hydroelectric power, and ensuring reliable water supply for domestic and industrial use. It aims to cultivate a gross irrigation potential of 436,825 hectares across drought-prone and rain-fed areas in Andhra Pradesh, primarily through left and right bank canals serving districts such as East Godavari, West Godavari, Visakhapatnam, and Krishna, thereby stabilizing existing farmland and enabling multi-season cropping to boost agricultural output.[1] The project also targets the production of 960 megawatts of hydropower via a surface power house equipped with 12 units of 80 MW each, contributing to regional energy needs while minimizing reliance on fossil fuels.[2]Beyond local benefits, the initiative includes provisioning 23.44 thousand million cubic feet (TMC) of water for drinking purposes to Visakhapatnam urban area and adjoining industries, such as the Visakhapatnam Steel Plant, addressing chronic urban water deficits. Additionally, it facilitates the diversion of approximately 80 TMC of surplus Godavari waters to the Krishna River basin, supporting downstream irrigation and mitigating seasonal shortages in interconnected river systems.[2]Its elevation to national project status under Section 90 of the Andhra Pradesh Reorganisation Act, 2014, highlights its broader strategic value to India's water security framework, with the central government assuming responsibility for execution, funding, and regulatory clearances to ensure timely completion in the public interest.[6] This designation stems from the project's capacity to harness underutilized river flows for inter-basin transfers, aligning with national goals of drought-proofing peninsular regions and integrating into larger river linking schemes, while addressing post-bifurcation resource equity among affected states like Telangana, Odisha, and Chhattisgarh.[21] By centralizing oversight through bodies like the Polavaram Project Authority, it underscores the federal commitment to infrastructure that enhances economic resilience and food production amid variable monsoons.[6]
Historical Development
Early Proposals and Feasibility Studies
The idea of constructing a storage reservoir at Polavaram on the Godavari River originated in the mid-19th century, when British engineer Sir Arthur Cotton, while overseeing the Dowleswaram Barrage (completed in 1852), identified the site's potential for impounding floodwaters to support irrigation in the delta regions.[22] This early conceptualization emphasized harnessing surplus monsoon flows that otherwise discharged unused into the Bay of Bengal, reflecting pragmatic hydraulic engineering principles amid colonial priorities for agricultural productivity.[22]The first formal proposal emerged on July 16, 1941, under the Madras Presidency, which advocated for a multipurpose dam to generate hydropower, irrigate arid upland tracts, and mitigate floods in the Godavari basin.[23]Diwan Bahadur L. Venkata Krishna Iyer, a senior engineer, spearheaded the initiative, drawing on hydrological data to project benefits for over 1 million acres of cultivable land across present-day Andhra Pradesh districts.[18] Preliminary feasibility investigations commenced shortly thereafter, involving topographic surveys and basic hydrological assessments to evaluate dam alignment, spillway requirements, and submersion impacts, though wartime constraints delayed comprehensive analysis.[23]Post-independence, during India's First Five-Year Plan (1951–1956), the Government of India reviewed Polavaram alongside alternative Godavari sites like Ramapadasagar but deferred prioritization, opting instead for upstream projects such as the Godavari Anicut system to address immediate irrigation deficits with lower capital outlay. Momentum revived in the 1970s amid growing recognition of inter-basin water transfers; in 1978, the Andhra Pradesh government commissioned a detailed project report (DPR) to quantify reservoir storage (estimated at 194 thousand million cubic feet), irrigation potential (up to 1.2 million acres), and power generation (960 MW). The DPR, incorporating geological borings, sediment yield models, and cost-benefit analyses, was finalized in 1985 and submitted to the Central Water Commission in 1987 for technical clearance, marking the transition from conceptual studies to actionable planning despite ongoing debates over environmental and displacement costs.[24]
Key Milestones in Planning and Approval
The first conceptual proposal for the Polavaram Project was put forward in July 1941 by the Madras Presidency, with preliminary investigations initiated thereafter to assess its feasibility for irrigation and flood control on the Godavari River.[23] Detailed feasibility studies and surveys continued intermittently through the post-independence period, focusing on hydrological data and site-specific engineering challenges, though progress stalled due to interstate water-sharing disputes.[25]A significant advancement occurred on April 2, 1980, when Andhra Pradesh, Madhya Pradesh, and Odisha signed an interstate agreement under the Godavari Water Disputes Tribunal award, authorizing clearance for the project and enabling Andhra Pradesh to proceed with submergence in upstream states.[25][18] The detailed project report (DPR) was completed in 1985 and submitted to the Central Water Commission (CWC) in 1987 for technical appraisal, incorporating estimates for irrigation potential, hydropower generation, and reservoir capacity.[24]Initial environmental clearance was granted by the Ministry of Environment and Forests in October 2005, following submission of environmental impact assessments, though this was later quashed by the National Green Tribunal in 2008 amid concerns over inadequate tribal displacement studies and forest loss evaluations.[26] Investment clearance for the original estimated cost of Rs. 7,163 crore (at 2003-04 prices) was accorded by the Planning Commission on February 25, 2009, paving the way for funding under the Accelerated Irrigation Benefits Programme.[27]The project received designation as a national project under Section 90(1) of the Andhra Pradesh Reorganisation Act, 2014, effective from June 2, 2014, transferring responsibility for execution, clearances, and funding to the central government while deeming consent from Telangana.[28] A revised DPR, addressing scope changes and cost escalations to Rs. 55,548 crore (at 2017-18 prices), was approved by the Technical Advisory Committee of the Ministry of Water Resources in February 2019.[29] The Polavaram Project Authority was established in January 2015 to oversee inter-state coordination and implementation.[6]
Construction Timeline and Political Influences
Construction of the Polavaram Project commenced in 2005 following administrative approval in 2004, with initial works focusing on foundational elements like the diaphragm wall and cofferdams.[30] Early progress included land acquisition and preliminary earthworks, but the project faced immediate scaling challenges due to its massive scope, leading to revised timelines beyond the initial 2007 target.[31] By 2013, the diaphragm wall—a critical seepage barrier—was under construction, but it suffered significant damage during the 2020 Godavari floods, with approximately 35% affected at multiple points, necessitating reconstruction.[32] Further setbacks occurred in August 2025 when the upper cofferdam experienced a major slide, highlighting ongoing geotechnical vulnerabilities in the site's permeable soils.[33]As of October 2025, reconstruction efforts include a new diaphragm wall initiated in early 2025, targeted for completion by December 2025 using advanced trench cutters and grabbers.[34] Earth-cum-rockfill dam works are scheduled to begin in November 2025, with Phase 1 completion projected for June 2027, though earlier directives aimed for October 2026.[35][36]Dewatering of the site began in June 2025 to facilitate these advances, marking a resumption of momentum after prior halts.[37] Despite these milestones, the project remains approximately 50% complete after two decades, with cost escalations exceeding ₹21,000 crore attributed to repeated rework and inflation.[38]Political dynamics have profoundly shaped the project's trajectory, with successive Andhra Pradesh governments prioritizing it as a prestige initiative while engaging in mutual recriminations over delays. The Telugu Desam Party (TDP) under N. Chandrababu Naidu accelerated works post-2004 approval but faced interruptions after the 2009 shift to Congress rule under Y. S. Rajasekhara Reddy, who integrated it into the Jala Yagnam program yet struggled with funding.[39] The 2014 state bifurcation, creating Telangana, elevated Polavaram to national project status with central funding commitments, but sparked disputes over submergence of Telangana territories and water allocation, complicating land mergers and rehabilitation.[40] Post-2014 TDP governance advanced headworks but saw contractor changes and quality lapses, while the 2019 YSR Congress Party (YSRCP) administration under Y. S. Jagan Mohan Reddy halted certain packages in 2019, reversed progress, and minimized advancements until 2024, prompting accusations of inefficiency and favoritism.[41][30]The 2024 return of TDP-led NDA governance has refocused efforts with Union Minister Nitin Gadkari's oversight and enhanced central allocations, aiming to mitigate prior state-level funding shortfalls exacerbated by bifurcation revenue losses.[42] Inter-state tensions persist, with Odisha raising submergence concerns and Telangana contesting upstream impacts, though Andhra maintains the project's design minimizes externalities.[43] Allegations of corruption, labor exploitation by contractors, and political nexus have surfaced across regimes, underscoring how electoral cycles and patronage networks contribute to cost overruns and execution gaps beyond pure technical hurdles.[44] Central intervention, including expert panels post-damages, has been pivotal in enforcing standards, yet state political volatility remains a causal factor in protracted timelines.[34]
Technical Specifications
Dam and Spillway Design
The Polavaram Dam consists of a main earth-cum-rockfill embankment flanking a central concretegravity spillway, engineered to manage high flood discharges while providing structural stability in a seismically active region. The embankment dam reaches a maximum height of 39.28 meters above the riverbed, utilizing locally sourced materials for the core and shell to ensure impermeability and resistance to seepage.[45] The design incorporates a diaphragm wall for enhanced foundation stability, particularly critical given the alluvial and rocky substrata along the Godavari River, to prevent underseepage and uplift pressures during reservoir filling.[46]The spillway, positioned on the right bank of the river, features an ogee-shaped crest profile optimized for efficient flow over the structure during extreme events. It spans 1,118.4 meters in length and is equipped with 48 radial gates, each measuring 16 meters wide by 20 meters high, enabling precise control of releases.[2] The crest elevation is set at +25.72 meters, with the structure designed to discharge the probable maximum flood (PMF) of 141,435 cubic meters per second (approximately 5 million cubic feet per second), corresponding to a 1-in-10,000-year event based on hydrological assessments of the Godavari basin.[2][47] This capacity exceeds initial tribunal specifications of 36 lakh cusecs at a 140-foot pond level, incorporating conservative margins for upstream tributary inflows and climate variability.[25]Seismic considerations in the design adopt horizontal and vertical coefficients of 0.08 and 0.04, respectively, reflecting the project's location in Seismic Zone III, with the spillway's maximum height reaching 57.90 meters to accommodate overtopping risks.[48] Radial gates were selected over vertical lift types for their hydraulic efficiency and reduced operational head losses, supported by finite element analyses validating stress distribution under full reservoir and flood loading conditions.[49] The overall configuration prioritizes flood attenuation to protect downstream deltas, with energy dissipation features in the stilling basin to minimize scour at the toe.[3]
Component
Specification
Dam Type
Earth-cum-rockfill embankment with concrete spillway
The reservoir of the Polavaram Project features a full reservoir level (FRL) of 45.72 meters (150 feet) above mean sea level and a minimum drawdown level of 41.15 meters (135 feet).[50] The gross storage capacity at FRL totals 5,511 million cubic meters (Mm³), equivalent to 194.6 thousand million cubic feet (TMCft), while live storage—usable for irrigation, power generation, and other purposes—amounts to 2,130 Mm³ (75.2 TMCft).[50][1] Dead storage below the minimum drawdown level constitutes the remainder, primarily to accommodate sediment accumulation from upstream inflows, though its precise volume varies with siltation rates observed over time.[51]Hydrologically, the Polavaram site captures nearly the entire Godavari River basin, with a catchment area of approximately 306,643 square kilometers contributing to inflows.[52] The Godavari's long-term average annual surface flow at this downstream location reaches about 110 billion cubic meters (km³), predominantly from monsoon rainfall between June and October, enabling high utilization rates despite the reservoir's modest storage relative to total yield.[53] Design considerations account for peak flood events, with the spillway engineered for a maximum discharge capacity of 36 lakh cusecs (approximately 10,188 cubic meters per second, cumecs) to handle the probable maximum flood of 1.02 million cusecs (28,800 cumecs).[25][52] This configuration prioritizes flood moderation and water diversion over extensive impoundment, as annual demands exceed live storage by factors of 3–4 times, relying on regulated releases from upstream projects like Srirama Sagar.[50]
Power and Irrigation Infrastructure
The power infrastructure of the Polavaram Project centers on a surface power house situated on the left bank of the dam, featuring an installed hydropower capacity of 960 MW through 12 turbine-generator units, each with a rating of 80 MW.[2] This facility harnesses the hydraulic head from the reservoir to produce electricity, with a gross head of approximately 27.95 meters supporting the generation process.[54] The design incorporates water conductor systems, including tunnels and penstocks, to channel flow efficiently to the turbines.[2]The irrigation infrastructure comprises an extensive network of canals originating from the dam's headworks. The left main canal extends 181.999 km, designed to deliver water by gravity to a culturable command area (CCA) of 161,855 hectares (400,000 acres) primarily in East Godavari and Visakhapatnam districts of Andhra Pradesh.[1][2] This canal system includes branch canals and distributaries to stabilize existing ayacuts and extend coverage to new areas.[2]Complementing the left canal, the right main canal measures 178.81 km and serves dual purposes of irrigating local command areas and diverting surplus Godavari water (up to 80 TMC annually) toward the Krishna River basin for inter-basin transfer.[1] The right canal supports irrigation in West Godavari and Krishna districts, contributing to the project's total irrigation potential of 436,825 hectares across Andhra Pradesh.[1] Both main canals are lined in sections to minimize seepage losses and incorporate structures such as aqueducts, syphons, and cross-drainage works to navigate topography.[2]The integrated power and irrigation systems rely on the dam's reservoir, with a gross storage capacity of 194 TMC, enabling year-round water allocation for hydropower peaking and irrigation during dry seasons, while spillway arrangements manage flood discharges.[2]
Anticipated Benefits
Agricultural and Economic Impacts
The Polavaram Project is projected to generate an annual irrigation potential of 10.80 lakh acres (approximately 4.37 lakh hectares) through enhanced water distribution via main canals and branch networks, enabling higher cropping intensity of up to 150% in command areas across Andhra Pradesh districts including Eluru, West Godavari, Krishna, and East Godavari.[1] This expansion includes new irrigation for 5.25 lakh acres and stabilization of existing systems covering 2.2 lakh acres, facilitating year-round cultivation and crop diversification from rain-fed paddy to high-value crops such as sugarcane, cotton, and horticultural produce.[1] Reliable water supply is expected to mitigate drought risks, with hydrological models indicating sustained reservoir inflows supporting multiple cropping seasons.[55]Agriculturally, the project anticipates a significant uplift in productivity, with estimates suggesting doubled yields in irrigated zones due to controlled water application reducing dependency on erratic monsoons and groundwater overexploitation.[56] Farmer incomes in the command area could rise by 30-50% through expanded ayacut and improved soil moisture retention, as evidenced by analogous irrigation schemes in the Godavari basin where stabilized supplies led to similar gains in output per hectare.[57] The infrastructure, including the 178.81 km right main canal, will extend benefits to en route lands, promoting agro-based industries like rice milling and food processing.[1]Economically, the initiative is forecasted to contribute substantially to Andhra Pradesh's agrarian GDP by bolstering output from a sector employing over 60% of the rural workforce, with projected annual agricultural value addition exceeding ₹10,000 crore based on enhanced yields and market linkages.[58] Benefit-cost analyses from project appraisals indicate a ratio above 1:1, factoring in irrigation returns alongside ancillary gains like reduced migration and localized employment in canal maintenance and farming operations.[59]Industrial water allocation from surplus flows is poised to attract manufacturing investments, fostering job creation estimated at tens of thousands in downstream sectors, though realization hinges on timely completion amid cost escalations.[60] Overall, the project's causal chain links water security to economic multipliers, potentially elevating regional per capita incomes through integrated rural development.[56]
Hydropower and Energy Security
The Polavaram Project incorporates a surface hydropower plant on the left flank of the dam, featuring 12 Kaplan turbine units each rated at 80 MW, yielding a total installed capacity of 960 MW.[2] This configuration utilizes the reservoir's hydraulic head and flow from the Godavari River, with water conducted through tunnels and a tailrace system for efficient generation.[61] The plant is designed primarily as a run-of-river facility augmented by seasonal storage, enabling power production during monsoon inflows from June to December.[62]Upon full commissioning, the facility is projected to generate approximately 2.37 billion kilowatt-hours (kWh) of electricity annually, equivalent to about 2,369 million units, supporting peak and baseload demands in Andhra Pradesh.[63] This output derives from hydrological assessments of average annual inflows and operational efficiencies, with Kaplan turbines optimized for low-head, high-flow conditions typical of the Godavari basin.[4]In terms of energy security, the 960 MW addition will expand Andhra Pradesh's hydroelectric capacity, which stood at around 2,336 MW prior to the project, by over 40%, enhancing grid reliability and reducing reliance on coal-fired thermal plants that dominate the state's 20,000+ MW total installed base.[64] As a renewable source, it provides dispatchable power for peaking during high-demand periods, mitigating intermittency risks from solar and wind integrations, while contributing to lower carbon emissions in a region where thermalgeneration accounts for the majority of supply.[54] The project's integration via dedicated transmission lines to the state grid further bolsters regional energy independence, aligning with national goals for diversified hydropower under India's renewable energy targets.[65]
Urban Water Supply and Navigation Enhancements
The Polavaram Project allocates 23.44 thousand million cubic feet (TMC) of water for drinking and industrial supply, directed primarily through the left main canal to Visakhapatnam city and the Visakhapatnam Steel Plant.[2] This provision addresses urban water demands in Andhra Pradesh's northern coastal region, supporting residential and industrial consumption in Visakhapatnam and surrounding areas.[1]In addition to urban allocations, the project delivers drinking water to 2.85 million individuals across 611 villages along the canal routes, mitigating scarcity in rural and semi-urban locales.[25] The 182-kilometer left main canal extends irrigation to East Godavari and Visakhapatnam districts while enabling water conveyance up to Anakapalli, with completion targeted for January 2026 to expedite urban distribution.[66][2]Navigation enhancements stem from the project's reservoir and canal infrastructure, which stabilize water levels in the Godavari River and affiliated waterways. A proposed navigation channel connecting Rajamahendravaram (Rajahmundry) to Badrachalam is envisioned to facilitate inland transport and stimulate tourism.[67]Reservoir impoundment to depths of 41.15 to 45.72 meters will improve boating viability, prompting demands for permanent jetties to accommodate tourist vessels.[68] These features align with broader efforts to develop navigable stretches under National Waterway 4, potentially integrating cargo and recreational traffic along the Godavari.[69]
Current Progress and Challenges
Construction Achievements to Date
As of October 2025, the construction of the diaphragm wall—a vital underground barrier for the project's earth-cum-rockfill damfoundation—has advanced to 37,302 cubic meters out of a total required 63,656 cubic meters, representing approximately 59% completion.[66] This progress includes ongoing excavation and concreting using multiple trench cutters and grabbers, with works continuing uninterrupted despite seasonal floods in the Godavari River basin, enabling the completion of an additional 6,600 square meters of parallel diaphragm wall segments in September 2025.[70]International experts have monitored the quality and pace, confirming adherence to design specifications for the 1,398-meter-long, 5-meter-wide structure.[71]Preparatory works for the main earth-cum-rockfill dam have reached a stage where principal construction is set to commence on November 1, 2025, pending final design approval from the Central Water Commission.[72] Upstream cofferdams and buttress berms, essential for diverting river flow during dam building, have seen incremental advancements, including rock filling at key gaps to stabilize the site.[73] These efforts build on earlier foundational achievements, such as partial spillway gate installations and initial canal alignments, contributing to an overall project completion rate exceeding 55% as reported in early 2025, with accelerated gains under current oversight.[74]Left and right main canals, integral to irrigation distribution, have progressed with sections operational for testing, including aqueducts and linings near Eluru, though full commissioning awaits reservoir filling.[75]Hydropower components, including power house foundations, remain in preparatory phases but benefit from site stabilization achieved through the diaphragm works.[76] These milestones reflect intensified resource allocation since mid-2024, prioritizing flood-resilient techniques and expert validation to mitigate prior delays.[77]
2025 Developments and Acceleration Efforts
In early 2025, the Andhra Pradesh government under Chief MinisterN. Chandrababu Naidu intensified efforts to accelerate the Polavaram Project, achieving a progress milestone of 55.90% overall completion by February, a 6.1 percentage point increase from the prior eight months under the NDA administration, compared to 38.21% as of May 2019. This uptick was driven by renewed focus on critical infrastructure, including the initiation of a new diaphragm wall on January 18, which reached 11.33% completion (158.20 meters out of 1,396.60 meters) by April, with a targeted finish by December 31.[74] The government also announced enhanced rehabilitation measures for project-affected families in March, aiming to address displacement concerns amid accelerated construction.[12]By mid-2025, construction faced scrutiny for uneven pacing, with reports in July highlighting delays in meeting the diaphragm wall deadline despite overall momentum, though the project demonstrated resilience by managing flood discharges exceeding 10.17 lakh cusecs via the spillway in August. Acceleration efforts included the start of a new parallel diaphragm wall at Gap II on May 5, as noted by the Polavaram Project Authority, and international engineering experts commended the site's progress and quality standards in September.[6][78][79][71]In October 2025, Naidu issued directives to expedite works for completion ahead of the 2027 Godavari Pushkarams, mandating the earth-cum-rockfill dam construction to begin in November and conclude by December 2027, alongside finishing the left main canal by January 2026 to enable water supply to Anakapalli district. Complementary acceleration targeted the Polavaram-Banakacherla linkage for Godavari water diversion to Rayalaseema by 2027, bypassing stalled interstate negotiations. These measures built on the buttress dam's full completion and 74% vibro-compaction progress reported contemporaneously, underscoring a strategic push to operationalize key components despite persistent hydrological risks like cofferdamerosion during floods.[80][66][81][82][83]
Ongoing Technical and Logistical Hurdles
The Polavaram Project continues to encounter structural vulnerabilities in its cofferdam system, particularly the upper cofferdam, which has experienced multiple slides and cave-ins exacerbated by heavy monsoon rains. In August 2025, a 10x10 meter mud slip occurred on the left bank between stretches 80-90 due to continuous rainfall, prompting emergency repairs that were completed within days, with officials asserting no downstream impacts or structural damage.[84][85] However, independent reports highlighted ongoing seepage issues necessitating persistent dewatering operations, even as diaphragmwall construction proceeded, raising concerns over the cofferdam's stability for diverting river flow during dam foundation work.[83][86] Project authorities have downplayed these incidents as minor and vehicle-induced, denying broader damage claims amid conflicting assessments from site observers.[87]Quality control remains a persistent technical challenge, with lapses in construction standards persisting despite recommendations from foreign experts. As of July 2025, the project selected a third-party agency to oversee transparency and adherence to specifications, addressing recurrent defects in materials and workmanship that have delayed progress.[34] These issues compound foundational geological risks in the Godavari basin, where weak soil strata have historically complicated seepage mitigation and required reinforced designs like the diaphragm wall, targeted for completion by late 2025.[7]Logistically, land acquisition and rehabilitation efforts face significant delays, hindering site clearance and displacing communities without timely alternatives. In September 2025, officials in Alluri Sitarama Raju district were directed to identify 4,000 acres for resettling project-affected families, particularly tribals, amid prolonged compensation disputes and possession holdups.[89][90] August 2025 directives from Eluru district authorities urged expedited acquisitions for relief and rehabilitation, yet bureaucratic and resistance-related bottlenecks persist, contributing to overall project stagnation.[91][12] These hurdles, intertwined with funding intermittency, have extended timelines, with technical interventions like cofferdam reinforcements and logistical streamlining essential to meet accelerated targets for 2026 canal completion and 2027 full operations.[92]
Financing and Governance
Funding Mechanisms and Central Support
The Polavaram Project's funding has historically relied on a combination of state budgetary allocations from Andhra Pradesh and central government assistance, with the latter intensifying after the project's designation as a national project of importance in 2014 under the Andhra Pradesh Reorganisation Act.[93] This status shifted the financial burden toward the centre, which committed to covering a significant share of costs, including through reimbursements via the Long Term Irrigation Fund managed by the National Bank for Agriculture and Rural Development (NABARD).[94] Mechanisms include direct budgetary grants, extra-budgetary resources raised by NABARD with government guarantees, and phased releases tied to project milestones, such as the Rs 1,400 crore sanctioned in 2018 for headworks completion.[95]In July 2024, Finance Minister Nirmala Sitharaman announced that the central government would fully finance the project to accelerate completion, addressing prior delays attributed to funding shortfalls under the previous state administration.[96] This commitment materialized through substantial allocations: Rs 12,157 crore released as a balance grant, split as Rs 6,000 crore for fiscal year 2024-25 and Rs 6,157 crore for 2025-26, alongside the revised project cost approval of Rs 30,436.95 crore in the 2025 Union Budget.[97][98] The 2025-26 Union Budget further earmarked Rs 5,936 crore specifically for Polavaram, reflecting prioritized central support amid Andhra Pradesh's fiscal constraints.[99]Central funding releases have been responsive to state-submitted estimates, such as the Andhra Pradesh government's June 2023 proposal for Rs 17,144.06 crore in balance works, processed via the Ministry of Jal Shakti.[100] However, implementation has faced scrutiny over reimbursement delays and alignment with actual expenditures, with the centre historically approving costs below state claims—e.g., capping at Rs 47,725.74 crore in earlier revisions despite higher demands—to enforce fiscal discipline.[101] These mechanisms underscore a hybrid model where central grants mitigate state liabilities, but execution hinges on coordinated approvals and verifiable progress reporting.
Cost Escalations and Economic Analysis
The Polavaram Project's initial detailed project report, prepared in 1986, estimated costs at ₹2,665 crore based on 1985-86 price levels.[102] By 2004, when the project received central approval, the estimated cost had risen to approximately ₹14,000 crore, reflecting preliminary adjustments for scope including irrigation, hydropower, and flood control components.[103] The second revised cost estimate (RCE-II), approved by the Ministry of Jal Shakti at 2017-18 prices, stood at ₹55,548.87 crore, incorporating escalated expenses for construction, land acquisition, and rehabilitation.[104]Cost overruns have been driven primarily by prolonged delays exceeding two decades since construction began in earnest around 2004, compounded by inflation, iterative design modifications to address geological and hydrological challenges, and expanded rehabilitation requirements under updated land acquisition laws.[30][105] Political transitions in Andhra Pradesh, contractor terminations due to performance issues, and disputes over funding reimbursements between state and central governments have further inflated expenditures, with one assessment attributing over ₹10,000 crore in losses directly to delays as of late 2024.[106][107]
Economic assessments of the project hinge on projected returns from irrigating over 300,000 hectares, generating 960 MW of hydropower, and supplying drinking water to urban centers, though final benefit-cost ratios remain contingent on state-provided data clarifications and have not been independently verified in recent public analyses.[59]Government approval of revised estimates presupposes viability, with anticipated agricultural productivity gains and flood mitigation benefits outweighing costs in official evaluations, yet critics highlight that unchecked overruns—exacerbated by funding gaps and scope expansions—diminish net returns and strain public finances without proportional output realization.[104][106] Delays have imposed opportunity costs, including forgone irrigation revenues estimated in thousands of crores annually, underscoring the need for rigorous ex-post audits to validate long-term internal rates of return amid persistent fiscal pressures.[108]
Management Structure and Accountability
The Polavaram Project is owned and primarily executed by the Government of Andhra Pradesh through its Water Resources Department, with the Chief Engineer for the Polavaram Irrigation Project responsible for on-site construction oversight, including civil works for the dam, spillway, and canals.[6] Central government involvement stems from the project's designation as a national project under the Andhra Pradesh Reorganisation Act, 2014, leading to the establishment of the Polavaram Project Authority (PPA) via notification dated May 28, 2014, to ensure coordinated execution across interstate aspects.[94] The PPA operates under the Ministry of Jal Shakti, functioning as a nodal agency for monitoring, funding release, and technical guidance, with the Government of Andhra Pradesh's executing agency handling day-to-day implementation under PPA directives.[6]The PPA's Governing Body, chaired by the Secretary of the Ministry of Jal Shakti, includes representatives from relevant central ministries and Andhra Pradesh officials, tasked with policy formulation, progress review, and dispute resolution related to designs, land acquisition, and rehabilitation.[109] The Chief Executive Officer (CEO) of the PPA, appointed by the central government—such as Atul Jain, who assumed additional charge on December 19, 2024—holds administrative, financial, and operational powers equivalent to a head of department, including approval of expenditures and coordination with state agencies.[110] Supporting bodies include the Project Monitoring and Coordination Committee (PMCC), which tracks civil works, land acquisition, and rehabilitation activities for timely completion.[94]Accountability mechanisms emphasize technical scrutiny and external validation to address execution risks. The Central Water Commission (CWC) reviews dam designs and operational protocols, while the Central Soil and Materials Research Station (CSMRS) enforces quality control and assurance standards across construction phases.[94] Model studies for hydraulic performance are conducted by the Central Water and Power Research Station (CWPRS), and WAPCOS Limited serves as the Project Monitoring and Coordination Consultant, providing independent progress audits.[94] A third-party quality control framework, proposed by the PPA for headworks, left main canal, and right main canal, was implemented with agency selection in 2025 to enhance transparency amid persistent quality lapses, such as spillway foundation issues flagged by foreign experts.[111][34] Additional oversight includes periodic inspections by central parliamentary committees, as in January 2025, and interventions by the Andhra Pradesh Lokayukta for rehabilitation compliance, ensuring displaced families receive mandated compensation.[112][113]
Interstate Relations
Water Allocation Under Godavari Agreements
The Godavari Water Disputes Tribunal (GWDT), constituted in April 1969 under the Inter-State Water Disputes Act, 1956, to adjudicate claims among riparian states including Andhra Pradesh, Maharashtra, Karnataka, Madhya Pradesh, and Orissa, issued its final award on July 7, 1980. Rather than imposing fixed volumetric shares, the tribunal validated a series of pre-existing inter-state agreements negotiated between 1975 and 1979, which delineated utilizable quantities based on project-specific assessments and principles of equitable apportionment at 75% dependability flow. These agreements implicitly assigned utilizations totaling approximately 2,102 TMC from the basin's assessed 2,360 TMC dependable yield, prioritizing in-basin uses while permitting limited diversions subject to non-prejudicial impacts on co-riparians.For the Polavaram Project, the GWDT explicitly approved Andhra Pradesh's construction of the dam on the main Godavari stem and its utilization for irrigation, hydropower, and inter-basin transfer, confirming that upstream tributary projects by other states would not diminish flows available at the Polavaram site. The tribunal authorized the diversion of up to 80 TMC of surplus Godavari water at 75% dependability through Polavaram's canals to augment irrigation in the Krishna basin, particularly the Krishna delta, without altering upper riparian entitlements.[114][25] This diversion quantum was calibrated to harness monsoon excesses post in-basin allocations, with the project reservoir designed to store 75.2 TMC live capacity for regulated releases.[6]In-basin allocations under the endorsed agreements permitted Andhra Pradesh to draw from Godavari flows for Polavaram's irrigation command of about 320,000 hectares across upland areas, stabilizing delta ayacut below Dowleswaram barrage, and 960 MW hydropower generation, with annual consumptive use estimated at 23-30 TMC net after return flows. The framework required Andhra Pradesh to maintain minimum flows for downstream ecology and navigation, while upper states like Maharashtra and Madhya Pradesh secured protections for their tributary abstractions totaling around 753 TMC combined. Post-2014 bifurcation, these pre-bifurcation entitlements under GWDT continue to underpin Andhra Pradesh's Polavaram operations, though implementation amid Telangana's claims has invoked supplementary bilateral talks without altering core tribunal approvals.[25].pdf)
Disputes with Telangana
The disputes between Andhra Pradesh and Telangana over the Polavaram Project intensified after the 2014 bifurcation of Andhra Pradesh, with Telangana expressing concerns over land submergence in its Khammam district, particularly around Bhadrachalam, due to the project's full reservoir level (FRL) operations. Telangana officials have highlighted that construction activities have accelerated floodwater flow towards upstream areas, reducing the time for flood peaks to reach Bhadrachalam from several days to hours, thereby increasing inundation risks during monsoons.[115][116] In April 2025, Telangana objected to ongoing works without adequate mitigation for submergence-related impacts, prompting calls for joint surveys to assess affected areas and ensure proper rehabilitation.[116]A major flashpoint emerged in 2025 over Andhra Pradesh's proposed Polavaram-Banakacherla Link Project (PBLP), which seeks to divert approximately 200 thousand million cubic feet (TMC) of surplus Godavari water from the Polavaram reservoir to the Krishna basin via a new canal and lift irrigation system in water-scarce Rayalaseema regions. Telangana contends that the PBLP violates the 1980 Godavari Water Disputes Tribunal (GWDT) award, which mandates prior consent from co-basin states for any inter-basin transfers or modifications to Polavaram's design that could alter water levels or flows affecting upstream allocations.[117][118][119] The project, estimated at ₹82,000 crore, has faced opposition on grounds that it encroaches on Telangana's allocated Godavari share—fixed at 1,060.78 TMC under post-bifurcation arrangements—potentially exacerbating water scarcity in Telangana's drought-prone districts without mutual agreement.[82][120]In response, Telangana urged the Union Jal Shakti Ministry in June 2025 to withhold environmental and technical clearances for the PBLP, citing non-compliance with GWDT stipulations and risks to its irrigation commands dependent on Godavari inflows.[121] The Expert Appraisal Committee (EAC) under the Ministry of Environment, Forest and Climate Change temporarily rejected Andhra Pradesh's proposal in July 2025, pointing to unresolved submergence issues in upstream states and the absence of interstate consensus.[122] Andhra Pradesh proceeded with preliminary works despite the setback, leading Telangana to announce plans in April 2025 to approach the Supreme Court, arguing the initiative undermines the Andhra Pradesh Reorganisation Act's provisions for equitable resource sharing.[123] The Union government responded by constituting a high-level expert committee on July 17, 2025, to mediate the broader Krishna-Godavari water disputes, including Polavaram-related contentions.[124]Legal proceedings have included multiple petitions in the National Green Tribunal and Supreme Court, with Telangana seeking directives to enforce GWDT consent requirements for any Polavaram height adjustments or diversions that could backwater into its territory.[125] As of October 2025, Andhra Pradesh accelerated PBLP site activities amid Telangana's silence on direct intervention, though Maharashtra's support for Telangana's GWDT claims added interstate dimensions to the impasse.[126][82] These conflicts underscore ongoing tensions over Polavaram's upstream externalities, with Telangana prioritizing protection of its riparian rights against Andhra Pradesh's developmental imperatives.
Disputes with Odisha and Chhattisgarh
Odisha and Chhattisgarh have raised objections to the Polavaram Project primarily due to anticipated submergence of lands and villages from reservoir backwater effects, disproportionately affecting tribal populations without adequate prior consultation or mitigation. According to surveys conducted by Andhra Pradesh, the project could lead to submergence in these states upon completion, prompting demands for comprehensive backwater studies and design revisions.[127] The disputes stem from the project's location on the Godavari River, where upstream storage and altered flood discharge capacities are expected to cause perennial inundation in downstream riparian areas.[128]In Odisha, particularly Malkangiri district, opposition intensified over risks to eight villages and approximately 1,005 families, with earlier estimates indicating 7,656 hectares of land submergence, including forest areas, potentially displacing over 6,800 residents, of whom 5,916 are tribals.[129][128] The Biju Janata Dal (BJD) has protested design modifications that increased the flood discharge capacity beyond the original 36 lakh cusecs—citing studies projecting peaks of 50 to 58 lakh cusecs, raising reservoir levels to 216-232 feet, exceeding the interstate-agreed maximum of 174.22 feet and exacerbating backwater flooding.[128] BJD delegations submitted memoranda to the Central Water Commission (CWC) on December 16, 2024, and the Ministry of Tribal Affairs on August 21, 2025, urging suspension of works until Odisha's concerns, including unaddressed tribal impacts, are resolved through independent studies.[128][130]Odisha's government, including Chief Minister Mohan Charan Majhi, has opposed the project in principle, rejecting proposed 30 km embankments as insufficient against flood risks, with public hearings still pending.[131][128]Chhattisgarh's concerns mirror Odisha's, focusing on submergence of up to 10 villages and associated tribal displacements, with the state filing a suit against the project as early as August 2011 under its then-BJP government.[132][133] The central government has suggested 29.12 km of embankments for mitigation, but Chhattisgarh joined Odisha and Telangana in Supreme Court petitions challenging regulatory compliance, environmental clearances, and lack of riparian state involvement in design alterations.[128][134] These legal challenges, ongoing as of May 2025, demand consultations and redressal before further construction, amid broader calls from joint action committees in March 2025 for halting works until all submergence issues across affected states are settled.[135][136] The disputes trace back to the 1980 Godavari Water Disputes Tribunal award, which did not fully anticipate post-construction modifications, leading to assertions that Andhra Pradesh proceeded unilaterally.[128]
Controversies and Critiques
Environmental and Ecological Concerns
The Polavaram Project's reservoir is projected to submerge approximately 3,731 hectares of forest land, resulting in direct deforestation and habitat fragmentation across Andhra Pradesh and neighboring states. This submergence threatens carbon sequestration capacity and disrupts ecological connectivity in the Eastern Ghats region. Construction activities have contributed to accelerated forest degradation, with studies documenting loss of biological resources including medicinal plants, timber species, and understoryvegetation essential for soil stability.[137]Biodiversity impacts are pronounced, with habitat loss affecting endangered mammals such as sloth bears (Melursus ursinus) and tigers (Panthera tigris), whose populations face degradation from reduced foraging areas and increased human-wildlife conflict post-impoundment.[138] The submergence area encompasses habitats for vulnerable, threatened, and rare species, including otters, pangolins, and various avifauna, leading to estimated declines in local faunal diversity without adequate translocation or corridor provisions. Aquatic ecosystems face risks from altered hydrology, including sedimentation buildup that could smother benthic habitats and reduce fish spawning grounds in the Godavari River.[137][138]Proximity to protected areas like Papikonda National Park amplifies concerns, as backwater effects and construction-induced land use changes have correlated with 12% forest loss within the park boundaries between 1991 and 2014, potentially fragmenting tiger corridors and migratory bird routes.[139] Submergence of graphite mines poses additional risks of heavy metal leaching into the reservoir, contaminating water quality and endangering downstream aquatic life and fisheries dependent on the Godavari delta.[140] Environmental impact assessments have identified these issues but note gaps in long-term monitoring data, with mitigation measures like compensatory afforestation often criticized for inadequate species matching and survival rates in comparable projects.[138]
Displacement, Rehabilitation, and Social Costs
The Polavaram Project is projected to displace approximately 96,660 families across 373 habitations in Andhra Pradesh, with significant impacts on scheduled tribe communities, including the Koya and Konda Reddi groups. Official estimates indicate submergence of up to 276 villages, primarily tribal-dominated areas, though recent assessments have expanded the affected zones to include additional habitations due to backwater effects and revised contour levels. This displacement affects over 177,000 individuals, with tribal families comprising a substantial portion, such as 3,093 out of 5,618 families in Devipatnam Mandal alone. Interstate ramifications extend to potential submergence of eight villages in Odisha and additional areas in Chhattisgarh, exacerbating cross-border social disruptions.[141][142]Rehabilitation efforts, mandated under the Land Acquisition, Rehabilitation and Resettlement Act, 2013, include a "land-for-land" policy promising equivalent agricultural land, housing, and livelihood restoration, but implementation has lagged. As of September 2025, Andhra Pradesh officials pledged phased rehabilitation adhering to norms, with Phase I targeting up to +41.15 meters contour affecting 20,946 families, of which only 6,351 had been relocated by late 2021. Public interest litigation in the Andhra Pradesh High Court has highlighted deficiencies, including incomplete compensation and flooded resettlement colonies during 2022 monsoons. In March 2025, Chief Minister N. Chandrababu Naidu announced accelerated resettlement, yet reports indicate persistent gaps, with many displaced families facing interim insecurity and unfulfilled promises of infrastructure in new sites.[141][143][12]Social costs manifest in profound impoverishment risks, particularly for tribal populations reliant on forest-based livelihoods and subsistence agriculture, leading to economic marginalization and cultural erosion. Displaced communities experience severed kinship networks, loss of traditional practices like Gussadi dance among affected tribes, and heightened vulnerability to poverty, as rehabilitation often fails to replicate pre-displacement self-sufficiency. Studies document increased uselessness and social fragmentation, with incomplete relocation compounding health, education, and employment deficits in transit camps. These outcomes underscore causal links between large-scale hydraulic infrastructure and involuntary displacement's long-term societal toll, disproportionately borne by indigenous groups despite project benefits accruing elsewhere.[144][145]
Allegations of Corruption and Inefficiency
The Polavaram Project has been subject to multiple allegations of corruption, particularly in land acquisition and contract execution. In October 2022, Devipatnam police registered cases against two Polavaram Irrigation Project officials and 27 others for allegedly diverting Rs 195 crore in land acquisition funds, with investigations revealing irregularities in compensation disbursals.[146] An RTI response in the same year exposed payments of Rs 6 crore to 21 fake farmers claiming 82 acres, highlighting fraudulent claims in the rehabilitation process.[147] A 2013 CAG audit further indicted the project for massive irregularities in irrigation schemes, including Polavaram, pointing to cost inflations and procedural lapses that enabled undue benefits to contractors.[148]Contractor-related scandals have also surfaced, such as the CBI probe into Transstroy India Ltd., a Hyderabad-based firm, for alleged bank fraud exceeding Rs 7,900 crore linked to overstated work claims on Polavaram packages; site verification showed only Rs 576 crore in actual progress against billed Rs 751 crore as of 2020.[149] Political figures have amplified these claims, with BJP Andhra Pradesh president D. Purandeswari stating in December 2023 that the project served as a "rich source of money for corrupt politicians," while Congress leader Chinta Mohan accused both TDP and YSRCP governments of graft driving cost escalations in January 2025.[150][151] Activists in 2018 described systemic corruption, noting that evidence of graft was often dismissed as isolated incidents despite patterns in tendering and oversight.[152] The Union Ministry of Jal Shakti denied widespread graft in June 2020, asserting no illegalities in execution based on its review.[153]Inefficiency allegations center on chronic delays and cost overruns, with the project, initiated in 2005, originally budgeted at Rs 10,151 crore but revised to over Rs 50,000 crore by 2023 due to inflation, contractor changes, and administrative hurdles.[154][155] Progress on critical components like the diaphragm wall has lagged, with international experts in August 2025 criticizing the slow pace as risking further timeline slippages, despite recommendations for quality controls.[156] CAG reports from 2018 attributed overruns in national water projects, including Polavaram, to poor contract management and delays escalating costs from Rs 3,530 crore baseline to multiples thereof.[157]Andhra PradeshChief MinisterY.S. Jagan Mohan Reddy extended the completion deadline to 2025 in August 2023, blaming TDP mismanagement, while YSRCP leaders in September 2025 cited "wrong priorities" under previous regimes for halting works.[158][159] These issues reflect broader governance challenges in large-scale infrastructure, where frequent political transitions and inadequate oversight have compounded inefficiencies.[160]
Future Prospects and Extensions
Integration with River Linking Initiatives
The Polavaram Project functions as a critical upstream reservoir in the Godavari (Polavaram)–Krishna (Vijayawada) link canal, a component of India's National River Linking Project (NRLP) under the Peninsular Links division, enabling the diversion of surplus Godavari waters to the water-stressed Krishna basin.[161] This integration aims to transfer approximately 5,325 million cubic meters (Mm³) of water annually through a proposed link canal originating from the Polavaram right main canal near Vijjeswaram and terminating near Vijayawada on the Krishna River, supporting irrigation expansion in Andhra Pradesh's drought-prone Rayalaseema and Krishna delta regions.[69] The project's design incorporates headworks including a barrage, navigation lock, and powerhouses to facilitate this inter-basin transfer, with Polavaram's reservoir providing regulatory storage to mitigate seasonal floods in the Godavari while optimizing downstream allocations.[1]Andhra Pradesh has actively pursued this linkage as part of its state-led initiatives, including the Polavaram-Banakacherla Head Regulator project, which seeks to channel Godavari floodwaters into the Krishna basin via an 80 TMC (thousand million cubic feet) diversion, estimated at ₹80,112 crore, explicitly tying it to national river interlinking goals for enhanced water security and hydropower generation.[11] The state government initiated construction elements of the link canal in 2024, leveraging Polavaram's infrastructure to preemptively enable transfers, though federal oversight requires interstate consensus under the NRLP framework, which has stalled broader implementation due to riparian disputes.[162] Proponents argue this setup could irrigate an additional 1.2 million hectares in the Krishna basin by balancing monsoonal surpluses against deficits, drawing on hydrological data showing Godavari's average annual yield exceeding allocated shares.[163]Further integration envisions Polavaram as a hub for cascading links, such as potential extensions to the Pennar and Cauvery basins via Krishna intermediaries, aligning with the NRLP's objective to interconnect 30 major rivers through 16,000 kilometers of canals for nationwide flood moderation and drought alleviation.[164] However, progress remains contingent on Detailed Project Reports (DPRs) validated by the National Water Development Agency (NWDA), with the Godavari-Krishna segment's feasibility affirmed in 2000 but delayed by environmental clearances and state-level allocations under the 2015 Godavari Water Disputes Tribunal award.[165] Andhra Pradesh's autonomous advancements, including the operational Pattiseema lift scheme diverting 70 TMC since 2014 as a precursor, underscore Polavaram's role in unilateral water optimization amid federal hesitancy.[166]
Additional Irrigation and Power Projects
The Pattiseema Lift Irrigation Project, operational since 2015, functions as a supplementary scheme to the Polavaram Project by diverting Godavari River water to Krishna delta canals, irrigating around 2 lakh hectares in water-scarce regions of Andhra Pradesh.[167] This lift irrigation system pumps up to 240 cubic meters per second from the Godavari near Pattiseema village, leveraging existing Polavaram right bank canal alignments to transfer approximately 70-80 thousand million cubic feet (TMC) of water annually during surplus periods.[168] Constructed at a cost of about Rs 1,300 crore, it mitigates drought impacts in Krishna and West Godavari districts pending full Polavaram reservoir utilization.[167]Proposed extensions include the Banakacherla Lift Irrigation Project, which seeks to channel surplus Polavaram waters into the Krishna basin for Rayalaseema's arid zones, targeting irrigation for additional lakhs of hectares through a 416 km infrastructure of canals, tunnels, pipelines, and multiple lift points.[169] Estimated at Rs 82,000 crore, the initiative plans to divert 200 TMC of floodwater yearly by upgrading the Polavaram Right Main Canal from 17,500 to 38,000 cusecs capacity and constructing reservoirs like Banakacherla on the Krishna River.[170] As of 2025, the project faces interstate disputes with Telangana over water shares and environmental clearances, with Andhra Pradesh advocating its role in balancing inter-basin water deficits.[171]On the power front, while the core Polavaram hydropower station targets 960 MW output via 12 units of 80 MW each, the reservoir's creation supports downstream enhancements and potential pumped storage developments to augment renewable energy capacity.[172] Seven units were slated for commissioning by 2024-25 to contribute to Andhra Pradesh's grid, generating an estimated 4 billion kWh annually from the project's hydro resources.[54] Further proposals, such as integrating with regional pumped hydro projects like the 1,350 MW Upper Sileru facility, aim to leverage Polavaram's stabilized flows for improved energy storage and peak demand management.[173]
Long-Term Risks and Policy Recommendations
One primary long-term risk associated with the Polavaram Project is reservoir sedimentation, which could diminish storage capacity by trapping silt from the Godavari River's upper catchment, potentially reducing effective water volume for irrigation and powergeneration within decades. Studies indicate that dams in the Godavari basin, including upstream structures, already contribute to sediment retention, exacerbating downstream deltaerosion and shoreline recession by limiting nutrient-rich silt delivery to coastal ecosystems. This process has been observed in analogous Indian river systems, where reduced sediment flux leads to subsidence and loss of agricultural productivity in deltas over 20-50 years.[174][20]Hydrological alterations pose additional risks, including modified flood regimes and water quality degradation from stagnant reservoirs, which may foster algal blooms and impair downstream fisheries and biodiversity. Expert analyses highlight inadequacies in initial environmental impact assessments for appraising these prolonged effects, such as shifts in aquatic habitats and terrestrial ecosystems spanning affected tribal forests. Climate change amplifies vulnerabilities, with projected erratic monsoons potentially causing inflow deficits during dry periods or overflow risks during extremes, as large dams have shown limited adaptive capacity in Indian contexts.[175][15]Persistent construction quality deficiencies, including seepage and material failures reported as recently as 2024, raise concerns over structural longevity and damsafety in a region classified under seismic zones II-III, where cumulative stresses from reservoir loading could precipitate cracks or breaches over operational lifespans exceeding 100 years. Financial unsustainability looms from cost overruns—now estimated over ₹1 lakh crore—and dependency on federal funding amid inter-state disputes, potentially straining Andhra Pradesh's fiscal health if benefits underperform due to these factors.[34][176]Policy recommendations emphasize establishing an independent, multi-disciplinary oversight body for continuous monitoring of sedimentation rates, ecological indicators, and structural integrity, with mandatory annual audits incorporating satellite and ground data to enable proactive interventions like selective reservoir flushing. To mitigate delta erosion, protocols for controlled sediment release during monsoons should be integrated into operations, informed by basin-wide hydrological modeling that accounts for upstream dams and land-use changes.[174]Enhancing project viability requires enforcing water-use efficiency standards in irrigated command areas, targeting reductions in evapotranspiration losses through drip systems and crop diversification, which could extend benefits amid variable inflows. Rehabilitation frameworks must evolve beyond one-time compensation to include long-term livelihood programs, such as skill training for displaced communities, verified through third-party evaluations to address documented shortfalls in forest rights and social equity. Finally, mandating transparent procurement and real-timedigital tracking of expenditures, as suggested by expert panels, would curb inefficiency risks while fostering inter-state collaboration via updated Godavari Water Disputes Tribunal mechanisms for equitable allocation adjustments.[177][34]