1001 Smart Cities
🇦🇷 Buenos Aires

Arroyo Maldonado relief tunnels & Buenos Aires's storm alert network

🤖 AI-generated summary · ◆ 1 sourced claim · 🔎 Last verified

This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.

1 sourced claim on this page, none individually verified yet — turn on “Sources in the text” to see each one.

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Two bored tunnels have carried the culverted Maldonado's overflow since 2012. The monitoring network funded by the same loan was never finished, and the World Bank's evaluators rated the outcome Moderately Unsatisfactory.

Outcome📉 Scaled back
Evidence📊 Independent
what does this mean?The strongest source is an independent non-academic evaluation: an audit office, a government or EU review, or an NGO. It grades who did the looking — not how well the project went. All four grades →
Run byGobierno de la Ciudad de Buenos Aires — Dirección General Sistema Pluvial (drainage, sensors, pumping stations); alert data converges at the Centro Único de Coordinación y Control under the Ministerio de Justicia y Seguridad
Scale🏙️ City-wide
Cost≈US$193M actual (appraisal US$189M)
FundingWorld Bank IBRD loan of US$134.01M plus City of Buenos Aires counterpart funds

Part of 1001 Smart Cities — 1,167 documented projects · 🏙️ 10 more in Buenos Aires · 🌊 Flood resilience guide · 🌱 Environment projects

Two bored tunnels — 9.8 km and 4.6 km, both 6 m across — have carried the culverted Maldonado's overflow since mid-2012, financed by a World Bank loan and sized for a 1-in-10-year storm. Water enters them hydraulically; no sensor sits in that loop. The measuring layer is separate: rain, wind, flow and level sensors feed a control desk, and a Sistema de Alerta de Tormentas with automatic stations and a Doppler radar followed in October 2016, its data converging at the city's Centro Único de Coordinación y Control. Readings raise alerts and send crews — no source describes a pump or gate starting on a threshold. The Bank's own evaluation arm rated the loan Moderately Unsatisfactory: the tunnels got built, but only two of six secondary-network groups were under way at closing and the monitoring network was never finished.

Live 📅 since 2005

📊 Impact

World Bank ICR: the works were designed to prevent flooding in the city's Maldonado basin in a 10-year storm, with about 342,968 direct beneficiaries in the basin's critical zone. The Bank's Independent Evaluation Group nonetheless rated the project's outcome Moderately Unsatisfactory, with the secondary drainage network under way in only 2 of 6 planned areas at closing.

🎓 Lesson

Bundling concrete and instruments in one budget rewards the concrete. IEG's own lesson from this loan is that structural and non-structural components need separate implementation arrangements — here the tunnels were finished and the monitoring network was not.

🌱 EnvironmentFlood resilienceWaterSensors & IoTSafety & security

Sources

↗ World Bank — IEG ICR Review, Urban Flood Prevention and Drainage (P088220)Published 13 April 2015Independent review. Gives the Moderately Unsatisfactory outcome rating, appraisal cost US$189M against actual US$193.01M, an IBRD loan of US$134.01M (originally EUR 98M), board approval 5 April 2005 and closing 31 August 2012 after extension from 31 December 2010; states the secondary drainage works were 'underway in 2 of the 6 proposed areas, with the remainder expected to be completed with City funds', and draws the lesson that combining structural and non-structural components in one project is challenging. The PDF at the same document ID returned unparseable binary to our fetcher; this identical .txt rendition was read instead.
↗ World Bank — Implementation Completion and Results Report, ICR2686Published 28 November 2012Source for the tunnel dimensions (9.8 km and 4.6 km, 6 m inner diameter, both in operation from mid-2012), the design standard ('designed to avoid flooding in the area of the City within the Maldonado Basin during rain events of 10 year intervals'), the figure of roughly 342,968 direct beneficiaries, and the statement that 'shortage of funding meant that the Project could not achieve the development of a complete hydrological monitoring network for the City'. PDF unparseable; .txt rendition read.
↗ Gobierno de la Ciudad de Buenos Aires — Sistema de Alerta de TormentasOperator page. Dates the system to October 2016, describes a network of 34 automatic meteorological stations 'of which 10 are already transmitting data', a dual-polarisation Doppler radar then still being installed at Merlo, and data converging at the Centro Único de Coordinación y Control, 'currently operated by the Ministry of Justice and Security'. The page reads as an undated snapshot close to launch — we did not find a current count of stations actually transmitting, so the entry claims none. Nothing on the page describes automatic actuation of pumps or gates.
↗ Gobierno de la Ciudad de Buenos Aires — Red hidrométricaConfirms the sensing layer: 'Los sensores monitorean en forma constante la lluvia, la temperatura, el viento, el caudal y el nivel del agua', feeding 'un tablero de control donde se visualizan en mapas y gráficos con la finalidad de detectar variaciones en los caudales y anticipar posibles inconvenientes'. No sensor count, no public data feed and no automatic response described — the basis for this entry's placement as warning-only.
↗ Infobae — inside the Maldonado conduits, 2 July 2024Describes maintenance rather than control: constant inspection because 'en esos conductos pluviales una obstrucción puede generar un problema muy grande', robots in the smaller pipes, cleaning of some 900 km of conduits and 30,000 sumideros by Espacio Público e Higiene Urbana, and a 6 m conduit that routes inflow from the Province to the Riachuelo via the Cildañez. Also cites rainfall up about 11% over two decades. No sensor-driven control is mentioned anywhere in the piece.
Show 5 more sourcesShow fewer
↗ La Nación — flooding in the city, 8 February 2024Updated 9 February 2024Counterweight: flooded streets and businesses and three subway lines out of service, a decade after the tunnels opened. Surfaced via search with headline and date; the article page itself was not fetched.
↗ Infobae — storm across the AMBA, 25 October 2025Second dated counterweight: close to 118 mm across the AMBA, with 155 mm in Villa Devoto and 114 mm in Villa Santa Rita, flooded neighbourhoods and cut streets. Surfaced via search; page not fetched.
↗ World Bank — Flood Risk Management Support Project for the City of Buenos Aires, 22 June 2016The follow-on loan (P145686), which moved to the Vega basin — the basin where the city's 2013 deaths occurred and which the Maldonado tunnels do not serve. Cited only for the existence and date of the successor project, not for any Maldonado figure.
↗ Infobae — eight dead in the city, 2 April 2013Contemporaneous reporting put the toll inside the Autonomous City at six to eight, in Saavedra, Colegiales, Villa Luro, Villa Ortúzar and Villa Urquiza — neighbourhoods largely in the Vega basin, not the Maldonado. Surfaced via search; page not fetched, and the exact final city figure varies between outlets, so the entry gives no number.
↗ La Nación — courts ratify 89 deaths in La PlataPublished 4 July 2014 · updated 15 February 2022Cited only to keep the tolls apart: the 89 judicially confirmed deaths of 2-3 April 2013 belong to La Plata, a different city roughly 60 km away, and are routinely merged with Buenos Aires figures in coverage. They are not attributed to this entry.

📅 How old is the evidence?

Two clocks, kept apart: when this entry’s sources were published, and what has happened to its record in the atlas. Documented span: since 2005. 7 of 10 sources carry a publication date, from 28 November 2012 to 25 October 2025.

When the sources were published

  1. World Bank · international organisationWorld Bank — Implementation Completion and Results Report, ICR2686
  2. Infobae · pressInfobae — eight dead in the city, 2 April 2013
  3. La Nación · pressLa Nación — courts ratify 89 deaths in La Plata · updated 15 February 2022
  4. World Bank · international organisationWorld Bank — IEG ICR Review, Urban Flood Prevention and Drainage (P088220)
  5. La Nación · pressLa Nación — flooding in the city, 8 February 2024 · updated 9 February 2024
  6. Infobae · pressInfobae — inside the Maldonado conduits, 2 July 2024
  7. Infobae · pressInfobae — storm across the AMBA, 25 October 2025

Every source, with links ↑

What happened to this record

  1. Sources last read
  2. Entered the record

Every revision, permanent →

Show your work What this page rests on and what it can’t tell you · all 1 claims with their sources · the forensic record

Evidence Passport · public beta 1 addressable claim, 10 source dossiers, one permanent baseline. The passport is unreviewed — an AI-assisted structural migration, not a human or expert endorsement. Every revision keeps a permanent copy under revision history.

Inspect the claims, one by one — verbatim text, sources and caveats for all 1

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-7db4e414c477082a quantitative
the works were designed to prevent flooding in the city's Maldonado basin in a 10-year storm, with about 342,968 direct beneficiaries in the basin's critical zone
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The impact attributes the design standard and beneficiary count to the World Bank ICR.
Caveat
The Bank's Independent Evaluation Group rated the project's outcome Moderately Unsatisfactory, with the secondary drainage network under way in only 2 of 6 planned areas at closing.

Sources carrying this claim

  1. World Bank — Implementation Completion and Results Report, ICR2686
Forensic record — source dossiers, gaps, hashes and the exact revision this page renders

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-08-20-source-dates effective 2026-07-26 · created 2026-08-20

Awaiting operator and domain-expert review; publication of this revision implies neither.

sha256:5730834229c4001dbfa806675e9f5a73399f7ed35f01979a4bb6fd20212c765b
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
1
of 1 claims mapped
10
source dossiers
8
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Gobierno de la Ciudad de Buenos Aires — Dirección General Sistema Pluvial (drainage, sensors, pumping stations); alert data converges at the Centro Único de Coordinación y Control under the Ministerio de Justicia y Seguridad
Actor types
city-government
Funding model
mixed
Funding description
World Bank IBRD loan of US$134.01M plus City of Buenos Aires counterpart funds
Cost
≈US$193M actual (appraisal US$189M)
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

10 source dossiers

World Bank — IEG ICR Review, Urban Flood Prevention and Drainage (P088220) documents1.worldbank.org · background

Open original source ↗

Stable source ID
src-612738650401aac4
Publisher
Name not classified · documents1.worldbank.org
Type / language
web-page · language not classified
Published
2015-04-13
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Independent review. Gives the Moderately Unsatisfactory outcome rating, appraisal cost US$189M against actual US$193.01M, an IBRD loan of US$134.01M (originally EUR 98M), board approval 5 April 2005 and closing 31 August 2012 after extension from 31 December 2010; states the secondary drainage works were 'underway in 2 of the 6 proposed areas, with the remainder expected to be completed with City funds', and draws the lesson that combining structural and non-structural components in one project is challenging. The PDF at the same document ID returned unparseable binary to our fetcher; this identical .txt rendition was read instead.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
World Bank — Implementation Completion and Results Report, ICR2686 documents1.worldbank.org · 1 linked claim

Open original source ↗

Stable source ID
src-3d60bcaca9a45cca
Publisher
Name not classified · documents1.worldbank.org
Type / language
web-page · language not classified
Published
2012-11-28
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Source for the tunnel dimensions (9.8 km and 4.6 km, 6 m inner diameter, both in operation from mid-2012), the design standard ('designed to avoid flooding in the area of the City within the Maldonado Basin during rain events of 10 year intervals'), the figure of roughly 342,968 direct beneficiaries, and the statement that 'shortage of funding meant that the Project could not achieve the development of a complete hydrological monitoring network for the City'. PDF unparseable; .txt rendition read.

Descriptive only — not page/paragraph exact
Claims linked
Gobierno de la Ciudad de Buenos Aires — Sistema de Alerta de Tormentas buenosaires.gob.ar · background

Open original source ↗

Stable source ID
src-89defab6e6a67f4c
Publisher
Name not classified · buenosaires.gob.ar
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Operator page. Dates the system to October 2016, describes a network of 34 automatic meteorological stations 'of which 10 are already transmitting data', a dual-polarisation Doppler radar then still being installed at Merlo, and data converging at the Centro Único de Coordinación y Control, 'currently operated by the Ministry of Justice and Security'. The page reads as an undated snapshot close to launch — we did not find a current count of stations actually transmitting, so the entry claims none. Nothing on the page describes automatic actuation of pumps or gates.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Gobierno de la Ciudad de Buenos Aires — Red hidrométrica buenosaires.gob.ar · background

Open original source ↗

Stable source ID
src-63a6bc265f8902a2
Publisher
Name not classified · buenosaires.gob.ar
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Confirms the sensing layer: 'Los sensores monitorean en forma constante la lluvia, la temperatura, el viento, el caudal y el nivel del agua', feeding 'un tablero de control donde se visualizan en mapas y gráficos con la finalidad de detectar variaciones en los caudales y anticipar posibles inconvenientes'. No sensor count, no public data feed and no automatic response described — the basis for this entry's placement as warning-only.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Infobae — inside the Maldonado conduits, 2 July 2024 infobae.com · background

Open original source ↗

Stable source ID
src-f22896dd44b4e26a
Publisher
Name not classified · infobae.com
Type / language
web-page · language not classified
Published
2024-07-02
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Describes maintenance rather than control: constant inspection because 'en esos conductos pluviales una obstrucción puede generar un problema muy grande', robots in the smaller pipes, cleaning of some 900 km of conduits and 30,000 sumideros by Espacio Público e Higiene Urbana, and a 6 m conduit that routes inflow from the Province to the Riachuelo via the Cildañez. Also cites rainfall up about 11% over two decades. No sensor-driven control is mentioned anywhere in the piece.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
La Nación — flooding in the city, 8 February 2024 lanacion.com.ar · background

Open original source ↗

Stable source ID
src-5b02ef8a3518cd64
Publisher
Name not classified · lanacion.com.ar
Type / language
web-page · language not classified
Published
2024-02-08
Updated
2024-02-09
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Counterweight: flooded streets and businesses and three subway lines out of service, a decade after the tunnels opened. Surfaced via search with headline and date; the article page itself was not fetched.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Infobae — storm across the AMBA, 25 October 2025 infobae.com · background

Open original source ↗

Stable source ID
src-d12d2fd7ea930f0c
Publisher
Name not classified · infobae.com
Type / language
web-page · language not classified
Published
2025-10-25
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Second dated counterweight: close to 118 mm across the AMBA, with 155 mm in Villa Devoto and 114 mm in Villa Santa Rita, flooded neighbourhoods and cut streets. Surfaced via search; page not fetched.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
World Bank — Flood Risk Management Support Project for the City of Buenos Aires, 22 June 2016 worldbank.org · background

Open original source ↗

Stable source ID
src-a492e52722648571
Publisher
Name not classified · worldbank.org
Type / language
web-page · language not classified
Published
2016-06-22
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The follow-on loan (P145686), which moved to the Vega basin — the basin where the city's 2013 deaths occurred and which the Maldonado tunnels do not serve. Cited only for the existence and date of the successor project, not for any Maldonado figure.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Infobae — eight dead in the city, 2 April 2013 infobae.com · background

Open original source ↗

Stable source ID
src-c774c32420f14191
Publisher
Name not classified · infobae.com
Type / language
web-page · language not classified
Published
2013-04-02
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Contemporaneous reporting put the toll inside the Autonomous City at six to eight, in Saavedra, Colegiales, Villa Luro, Villa Ortúzar and Villa Urquiza — neighbourhoods largely in the Vega basin, not the Maldonado. Surfaced via search; page not fetched, and the exact final city figure varies between outlets, so the entry gives no number.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
La Nación — courts ratify 89 deaths in La Plata lanacion.com.ar · background

Open original source ↗

Stable source ID
src-701ecded1a2c21ff
Publisher
Name not classified · lanacion.com.ar
Type / language
web-page · language not classified
Published
2014-07-04
Updated
2022-02-15
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Cited only to keep the tolls apart: the 89 judicially confirmed deaths of 2-3 April 2013 belong to La Plata, a different city roughly 60 km away, and are routinely merged with Buenos Aires figures in coverage. They are not attributed to this entry.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Known limits of this passport
  • Publisher names and source languages have not yet been classified; domains are recorded without guessing.
  • Existing source notes are descriptive locators, not page- or paragraph-exact citations.
  • A missing archive, publication date or content hash is shown as null rather than inferred.
  • The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.

Continue exploring

Compare this project

🇺🇸 TARP: Chicago's Deep Tunnel & Reservoir System · Chicago Both tunnels fill hydraulically: Chicago's real-time control is still research, and Buenos Aires's monitoring network was never finished. 🇺🇸 DC Water's Clean Rivers Tunnels & the Consent Decree Behind Them · Washington D.C. Outside obligations built both: a federal consent decree in D.C., a World Bank loan in Buenos Aires — and neither tunnel is sensor-driven. 🇧🇷 Alerta Rio: rain gauges, thresholds & favela sirens · Rio de Janeiro Rio's gauges report every five minutes and a Civil Defence officer sounds the siren; Buenos Aires's readings raise alerts and send crews.

Explore the wider context

📟 A Reading Is Not a Decision📖 Flood early-warning system📖 Automated speed enforcement (speed cameras)📖 District metering area (DMA)
📎 Cite this project

1001 Smart Cities (2026). “Arroyo Maldonado relief tunnels & Buenos Aires's storm alert network” — Buenos Aires, Argentina. The Smart City Atlas. https://1001smartcities.org/projects/buenos-aires-flood-management/ (last verified 2026-07-26). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

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