Three Gorges Dam: Delivered at Design Capacity — and an Invoice That Never Closes
The World's Largest Power Station Met Its Engineering Targets on Its 17-Year Plan. What It Cannot Settle Is the Argument About Everything Else.
The Three Gorges Dam is the largest power station ever built: 22.5 gigawatts, delivered broadly to its seventeen-year programme and, by China's National Audit Office, within its final budget — an outcome so rare in megaproject history that it deserves serious study. It is also a project that relocated well over a million people, drowned thirteen cities, and carries unresolved debates over siltation, seismicity and flood control. This investigation does both jobs at once: it explains the delivery machinery that worked — staged construction, a dedicated national funding mechanism, early revenue — and it refuses to call the result an uncomplicated success.
Watch: Three Gorges Dam: Delivered at Design Capacity — and an Invoice That Never Closes
Source: investigation key facts.
| Measure | Value |
|---|---|
| Original budget | Approved 1992 static budget about 90.1 billion yuan (May 1993 prices); dynamic estimate up to 203.9 billion yuan (~US$25 billion at contemporary rates) |
| Final cost | Audited final settlement 207.873 billion yuan (National Audit Office, 2013; roughly US$34 billion then). Independent estimates of true economic cost vary far more widely; contested |
Contents
What Happened
The Three Gorges Project was approved by the National People's Congress in April 1992 by a margin unprecedented in that body's history — not for its size, but for its dissent: roughly a third of delegates abstained or voted against, the largest recorded opposition to any proposal before the Congress. Construction formally began in December 1994 at Sandouping, Hubei, on a plan first drawn by Sun Yat-sen in 1919: a 2,335-metre concrete gravity dam, 185 metres high, holding back a 600-kilometre reservoir, with twin five-stage ship locks, a ship lift, and what would become a 22.5-gigawatt power station. The stated purposes were flood control, power and navigation — in that official order. The delivery machinery is the part most often skipped in Western accounts. Financing was secured upfront through a dedicated national mechanism: the Three Gorges Construction Fund, raised by a surcharge on electricity bills across most of China, supplemented by revenue from the downstream Gezhouba plant, state bank loans and corporate bonds. Construction was staged across three phases with a river diversion in 1997; crucially, the first generating units entered service in July 2003 — nine years into a seventeen-year programme — so the project began paying for itself while still under construction. The main dam wall was completed in May 2006; the reservoir reached its full 175-metre operating level in October 2010; and in July 2012 the last of 32 main units came online, taking the station to its full 22.5 GW. In 2020 the plant generated 111.8 terawatt-hours, a world record for a single station, against a design annual output of 88.2 TWh. By its thirtieth anniversary in December 2024 it had produced over 1.7 trillion kWh and intercepted floods on nearly seventy occasions, according to the Ministry of Water Resources. The National Audit Office's 2013 report fixed the final settlement at 207.873 billion yuan — within the dynamic budget. Against that record stands a ledger the engineering cannot close. The reservoir displaced officially about 1.13 million people (the figure rises towards 1.3 million in independent and later counts), submerging 13 cities, 140 towns and over 1,300 villages. Resettlement outcomes were uneven at best: academic and World Bank-reviewed evidence on earlier Chinese dam resettlement showed persistent impoverishment patterns, and China's own auditors found hundreds of millions of yuan of Three Gorges resettlement funds misappropriated in the programme's early years. Environmental concerns catalogued since the 1990s — reservoir-induced seismicity, landslides on destabilised banks, siltation, blocked fish migration, estuary salinity change — have been partly managed, partly confirmed, and never fully resolved; the state itself acknowledged 'urgent' ecological problems in 2011. The flood-control claim also deserves precision. The dam's designers and operators point to 2020 — when the reservoir absorbed record inflows and the station simultaneously set its generation record — as vindication. Critics note that the 2020 floods still displaced millions downstream and argue the event demonstrated the limits of any single structure against basin-scale flooding. Both readings are defensible; what is not defensible is the claim, heard from boosters and detractors alike, that the case is simple. PIA's framing: as a delivery programme, Three Gorges is a documented success; as a development decision, it remains a live argument — and the honest investigation holds both.
Why It Matters
Three Gorges is the central exhibit in any honest debate about state-delivered megaprojects. It demonstrates that a committed state with upfront financing, staged construction and revenue-generating phasing can deliver the largest infrastructure object on earth close to plan — a finding that embarrasses both the 'megaprojects always fail' school and the 'only markets deliver' school. It equally demonstrates the limits of delivery success as a verdict. Cost-benefit accounting that excludes displaced populations, ecosystems and downstream risk will certify almost anything. As countries from Ethiopia to Laos build mega-dams with Chinese finance and contractors, the question Three Gorges poses is not 'can it be built?' — it answered that — but 'what does the delivery record omit?'. That question is now the standard lens for every comparable project.
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approval
1992-04
The National People's Congress approves the Three Gorges Project — with roughly a third of delegates abstaining or voting against, the largest dissent in NPC history.
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construction
1994-12-14
Construction formally begins at Sandouping under a seventeen-year programme plan.
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milestone
1997-11
The Yangtze is closed and diverted at the dam site, enabling main-channel works — the programme's first great staging milestone.
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milestone
2003
The reservoir begins filling to 135 m and the first five-stage ship lock enters service; in July the first 700 MW generating unit produces power — revenue starts nine years into the programme.
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completion
2006-05-20
The main dam wall is completed at 2,309 m long and 185 m high; state media hail the end of the core concrete works.
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milestone
2008
Trial impoundment toward the 175 m full pool begins; relocation officially totals about 1.13 million people.
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completion
2009
The original seventeen-year programme concludes with all 26 originally planned main units in service; the underground six-unit extension continues.
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milestone
2010-10-26
The reservoir first reaches its full 175 m operating level, enabling design-capacity generation and flood storage.
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review
2011-05
China's State Council publicly acknowledges urgent ecological and geological problems around the reservoir and commits to remediation.
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completion
2012-07
The final (32nd) main generating unit enters service; the station reaches its full 22.5 GW design capacity.
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audit
2013-06
The National Audit Office reports the final settlement at 207.873 billion yuan — within budget — while noting past misappropriation of resettlement funds.
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opening
2016-09
The ship lift — the world's largest — enters trial operation, completing the navigation works later than originally envisaged.
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stress-test
2020
Record monsoon floods test the reservoir (inflow peaks of 75,000 m³/s); the plant simultaneously sets a world record of 111.8 TWh annual generation.
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legacy
2024-12
Thirtieth anniversary: cumulative generation passes 1.7 trillion kWh; the Ministry of Water Resources credits the project with nearly 70 flood interceptions; a new US$11 billion ship-lock waterway is later launched to relieve chronic lock congestion.
Root cause through the Project Failure Pyramid™ lens
The visible indicators: delays, cost overruns, quality defects, team attrition
Operational breakdowns: poor risk management, scope creep, inadequate resources
On time and on budget did not settle siltation, seismicity, resettlement hardship or flood-control limits. Governance frameworks that score only cost and schedule will certify projects that history judges more harshly.
River diversion, left-bank plant, right-bank plant, underground plant, ship locks, ship lift: each tranche was commissioned and proven before the next peaked. Scale stopped being a risk because it was never attempted all at once.
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Hypothecated Funding Beats Annual Appropriations
The Three Gorges Construction Fund — a national electricity surcharge — gave the programme a continuous, dedicated revenue stream insulated from annual budget politics. Megaprojects die of funding dribble; this one never went thirsty.
Design for Revenue Before Completion
First power flowed in July 2003, nine years into a seventeen-year programme. Phased commissioning turned the project into a self-financing asset mid-build and gave engineers an operating feedback loop while construction continued.
Stage the Impossible Into Deliverable Tranches
River diversion, left-bank plant, right-bank plant, underground plant, ship locks, ship lift: each tranche was commissioned and proven before the next peaked. Scale stopped being a risk because it was never attempted all at once.
Delivery Success Is Not Project Success
On time and on budget did not settle siltation, seismicity, resettlement hardship or flood-control limits. Governance frameworks that score only cost and schedule will certify projects that history judges more harshly.
Resettlement Deserves Engineering-Grade Governance
The concrete programme had world-class controls; the relocation of over a million people had demonstrably weaker ones — auditors found resettlement funds misappropriated in the early years. Social programmes need the same QA, audit and accountability as works contracts.
Publish the Caveats Yourself
China's own 2011 acknowledgement of ecological problems and the National Audit Office's public findings did more for the project's credibility than any promotional record. Institutions that document their own caveats retain control of the narrative.
A Single Structure Cannot Own a Basin-Scale Problem
The 2020 floods showed the dam absorbing record inflows and downstream districts still flooding. Flood control is a portfolio — reservoirs, forecasting, land use and evacuation — and overselling one asset invites backlash at the first extreme event.
Executive Recommendations
For mega-infrastructure, establish a dedicated, hypothecated funding mechanism before mobilisation; do not rely on annual budget cycles for multi-decade programmes.
Design programmes so that partial completion generates revenue or service early — first units, first spans, first segments — converting cost centres into self-financing assets.
Apply the same audit, QA and accountability regime to resettlement and environmental programmes as to engineering works, with independent monitors and published results.
Commission independent, continuing review of long-tail risks (siltation, induced seismicity, downstream ecology) with a mandate to publish, for the asset's whole operating life.
Communicate flood- or risk-control benefits as probabilistic and portfolio-based; never market a single structure as eliminating a basin-scale hazard.
PMOS Intelligence
Preview — illustrative assessment; PMOS is in development“Strip away the politics and three delivery decisions did the work. First, money before concrete: a hypothecated national electricity surcharge meant the project never waited on annual appropriations — the single most common megaproject killer. Second, cashflow from partial completion: first power in 2003, nine years in, converted the project from pure cost centre into a revenue machine mid-build; nothing disciplines a programme like its own income. Third, staging: diversion, left bank, right bank, underground plant — each phase commissioned and learned from before the next peaked. The counterweight insiders acknowledge quietly: the resettlement programme was run with far less rigour than the concrete programme, and it shows. Three Gorges is what happens when engineering governance is world-class and social governance is an afterthought — you get both a record-breaking power station and a permanent caveat.”Ramesh's Insider Take — opinion
Documentary Evidence
Three Gorges project marks 30th anniversary of construction
Xinhua via english.www.gov.cn (Ministry of Water Resources data) · 2024-12-15
Official operational record: over 1.7 trillion kWh generated, first unit July 2003, nearly 70 flood interceptions, 2.1 billion tonnes cumulative lock cargo — the state-side case for delivery success.
Three Gorges Dam sets world record for annual power generation in 2020
China Three Gorges Corporation · 2020-12-31
Operator record: 111.8 billion kWh in 2020 (a single-station world record), 22.5 million kW installed capacity and 88.2 billion kWh design annual output — evidence the plant performs at and above design.
Last Leg of Work on Main Three Gorges Dam Wall
Xinhua via china.org.cn · 2006-05-19
Contemporaneous construction record: main wall completion May 2006, 2,309 m length and 185 m height, estimated investment 203.9 billion yuan, and 1.13 million people relocated — the official figures PIA hedges against independent counts.
Three Gorges Dam, China (Image of the Day)
NASA Earth Observatory · 2009-06-08
Independent scientific catalogue of the caveats: relocation of 1.2 million-plus people, 13 cities and 1,300-plus villages flooded, and environmental concerns including reservoir-induced seismicity, landslides, ecosystem change, pollution and estuary salinity.
The Three Gorges: the unexamined toll of development-induced displacement
Forced Migration Review (Refugee Studies Centre, University of Oxford) · 2000
Critical assessment drawing on World Bank resettlement evaluations: patterns of impoverishment in earlier Chinese dam resettlements, weak legal guarantees for the displaced and the absence of independent monitoring — the basis for this investigation's resettlement caveats.
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- Related investigationsBoeing 737 MAX · Berlin Brandenburg Airport · NHS National Programme for IT
- Three Gorges project marks 30th anniversary of construction Xinhua / english.www.gov.cn · 2024-12-15 · government-news
- Three Gorges Dam sets world record for annual power generation in 2020 China Three Gorges Corporation · 2020-12-31 · official-corporate
- China country profile International Hydropower Association · 2025 · industry-body
- Last Leg of Work on Main Three Gorges Dam Wall Xinhua via china.org.cn · 2006-05-19 · government-news
- No Major Embezzlement of Funds Involving Three Gorges Dam (financing and audit oversight) People's Daily (English) · 2000-09-08 · state-media
- Three Gorges Dam, China NASA Earth Observatory · 2009-06-08 · government-science
- Yangtze Dams Spill Water (2020 monsoon floods) NASA Earth Observatory · 2020-07-24 · government-science
- The Three Gorges: the unexamined toll of development-induced displacement Forced Migration Review (University of Oxford) · 2000 · academic-review
Frequently Asked Questions
Broadly, yes on both counts by the state's own records. Construction ran 1994 to 2009-2012 against a seventeen-year plan, and the National Audit Office's 2013 report fixed the final settlement at 207.873 billion yuan — within the dynamic budget framework of up to 203.9 billion yuan. Independent economists dispute what that figure includes and excludes, so 'on budget' should be read as 'on the audited budget'.
Installed capacity is 22,500 MW from 32 main 700 MW units plus two 50 MW units — the world's largest power station. Design annual output is 88.2 TWh; in 2020 it generated 111.8 TWh, a single-station world record. Cumulative generation passed 1.7 trillion kWh by December 2024.
The official figure is about 1.13 million; NASA and many independent sources put it at 1.2 million or more, and figures around 1.3 million are common once later moves are counted. The reservoir submerged 13 cities, 140 towns and over 1,300 villages. Resettlement outcomes were uneven, with documented fund misappropriation and persistent hardship among some of those moved.
It substantially reduced but did not eliminate flood risk. The state credits it with nearly 70 flood-interception operations, and during the record 2020 monsoon the reservoir absorbed historic inflows. Yet the 2020 floods still displaced millions downstream, illustrating that one structure cannot control a basin-scale hazard — a point both operators and critics now accept.
The standing concerns are siltation of the reservoir, reservoir-induced seismicity and landslides on destabilised banks, blocked fish migration (including the Chinese sturgeon), water-quality and pollution accumulation, and changed salinity in the Yangtze estuary. Some have been mitigated through operations and remediation; China's own State Council acknowledged 'urgent' ecological problems in 2011, and independent scientific monitoring continues.
As a delivery programme — financing, staging, schedule, audited cost, operating performance — it is a documented success, arguably the strongest state-delivered megaproject on record. As a development decision, the verdict is contested because of the human displacement and environmental ledger. PIA classifies it as delivered and operating at design capacity, with enduring caveats — not an uncritical success.
