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Permanent project revision

Carolabrücke and Budapester Straße: Acoustic Monitoring of Dresden's Prestressed Bridges

Revision 2026-11-06-baseline · effective 2026-11-06

Current revision. This is the snapshot used by the live entity page.

unreviewed

Created the first structured Evidence Passport with 20 claims and 7 source dossiers.

sha256:d315bbc37a5a9576717923844058b17f787c1333273e72413f0b1e45ad6a31a0
All revisions → Current entity page →

Change set

  • add /evidencePassport — Added claim-level evidence mapping and source dossiers.
  • add /revisionHistory — Established a permanent, hash-addressed baseline revision.
20
of 20 claims mapped
7
source dossiers
7
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Claims, one by one

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-351a2543e179cebb quantitative
collapsed in the early hours of 11 September 2024
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The summary places the failure of the cross-beam connection, and with it the collapse of section C, in the early hours of 11 September 2024.
Caveat
The expert summary was written by MKP GmbH, the engineering firm the city also commissioned to install and run the monitoring on the Budapester Straße bridge.

Sources carrying this claim

  1. MKP GmbH — Vorläufige Erkenntnisse zur Ursache und Hergang des Teileinsturzes der Carolabrücke (expert summary, 11 Dec 2024)
Claim 2 clm-7c44e1c91bf1a52e descriptive
the bridge was inspected to the standards in force
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The expert summary states that bridge inspections were carried out regularly according to the applicable standards.
Caveat
This is the finding of the expert team the city commissioned; the public prosecutor's separate review is not covered here. The expert summary was written by MKP GmbH, the engineering firm the city also commissioned to install and run the monitoring on the Budapester Straße bridge.

Sources carrying this claim

  1. MKP GmbH — Vorläufige Erkenntnisse zur Ursache und Hergang des Teileinsturzes der Carolabrücke (expert summary, 11 Dec 2024)
Claim 3 clm-2f168fa09279c981 descriptive
existing cracks were monitored by crack-movement measurement
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The summary says the cracks then linked to stress corrosion were monitored by crack-movement measurement, but were attributed at the time to increased creep of the superstructure.
Caveat
The expert summary was written by MKP GmbH, the engineering firm the city also commissioned to install and run the monitoring on the Budapester Straße bridge.

Sources carrying this claim

  1. MKP GmbH — Vorläufige Erkenntnisse zur Ursache und Hergang des Teileinsturzes der Carolabrücke (expert summary, 11 Dec 2024)
Claim 4 clm-bda0f6578eb700a7 descriptive
hydrogen-induced stress corrosion cracking had begun during construction
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The summary names hydrogen-induced stress corrosion cracking as the main cause and says the corrosion damage arose during the construction phase.
Caveat
These were the interim findings presented in December 2024. The expert summary was written by MKP GmbH, the engineering firm the city also commissioned to install and run the monitoring on the Budapester Straße bridge.

Sources carrying this claim

  1. MKP GmbH — Vorläufige Erkenntnisse zur Ursache und Hergang des Teileinsturzes der Carolabrücke (expert summary, 11 Dec 2024)
Claim 5 clm-15b4cbfda6d0a9ad descriptive
the design meant failure would not announce itself through wide cracks
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The summary says structural particularities meant the hoped-for warning of failure through pronounced cracking could not occur.
Caveat
The expert summary was written by MKP GmbH, the engineering firm the city also commissioned to install and run the monitoring on the Budapester Straße bridge.

Sources carrying this claim

  1. MKP GmbH — Vorläufige Erkenntnisse zur Ursache und Hergang des Teileinsturzes der Carolabrücke (expert summary, 11 Dec 2024)
Claim 6 clm-592e4ffe821fe1cb descriptive
sensors that pick up the sound of a prestressing wire snapping
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The summary describes the system as recording, in real time, the acoustic signals produced by prestressing steel breaking.
Caveat
The expert summary was written by MKP GmbH, the engineering firm the city also commissioned to install and run the monitoring on the Budapester Straße bridge.

Sources carrying this claim

  1. MKP GmbH — Vorläufige Erkenntnisse zur Ursache und Hergang des Teileinsturzes der Carolabrücke (expert summary, 11 Dec 2024)
Claim 7 clm-a1b4e26d517ac610 descriptive
The expert summary made it the condition for reopening the Elbe to ships under the remaining sections
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The summary states that the waterway can only be temporarily reopened to shipping with acoustic emission monitoring installed and at least four weeks of prior measurement on sections A and B.
Caveat
The expert summary was written by MKP GmbH, the engineering firm the city also commissioned to install and run the monitoring on the Budapester Straße bridge.

Sources carrying this claim

  1. MKP GmbH — Vorläufige Erkenntnisse zur Ursache und Hergang des Teileinsturzes der Carolabrücke (expert summary, 11 Dec 2024)
Claim 8 clm-06f65480e05fce88 descriptive
built with prestressing steel prone to stress corrosion cracking
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The city states the monitoring was installed because the bridge uses prestressing steel at risk of stress corrosion cracking; the trade press adds that it comes from the former Hennigsdorf steelworks, like the Carolabrücke's.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Landeshauptstadt Dresden — Brücke Budapester Straße: Ab sofort Verkehrs- und Tonnagebeschränkung (8 May 2026)
  2. ingenieur.de — 326-t-Stresstest entscheidet über Schicksal der Budapester Brücke in Dresden
Claim 9 clm-ea2c4c7c234cad99 quantitative
122 acoustic emission sensors and about 850 metres of fibre-optic sensing listen for wire breaks and cracks
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The city gives 122 acoustic emission sensors and around 850 metres of fibre-optic sensing that register possible wire breaks and cracking.
Caveat
The same release says the system was installed a year earlier; the city's January 2026 release and the trade press date the acoustic sensors to autumn 2024.

Sources carrying this claim

  1. Landeshauptstadt Dresden — Brücke Budapester Straße: Ab sofort Verkehrs- und Tonnagebeschränkung (8 May 2026)
Claim 10 clm-02de066f8ff90d2d quantitative
the monitoring recorded several wire breaks from 16 February 2025
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The city states that from Sunday 16 February 2025 the acoustic emission monitoring installed on the bridge recorded several wire breaks.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Landeshauptstadt Dresden — Carolabrücke: Stadt beauftragt Hentschke Bau mit Abbruch (25 Feb 2025)
Claim 11 clm-f0946ec195500582 descriptive
citing acute risk of collapse, the city waived a tender and awarded the demolition directly
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The city says the acute risk of collapse allowed it to dispense with a tender and award the demolition directly.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Landeshauptstadt Dresden — Carolabrücke: Stadt beauftragt Hentschke Bau mit Abbruch (25 Feb 2025)
Claim 12 clm-66b71969bda4932c quantitative
ship-by-ship passages were permitted again from 24 February 2025 because no further breaks were recorded
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The city says that because the consultancy had recorded no further wire breaks, individually approved ship passages could be granted again from Monday 24 February 2025.
Caveat
Passages were limited to weekday time windows and required registration with the federal waterways office.

Sources carrying this claim

  1. Landeshauptstadt Dresden — Carolabrücke: Stadt beauftragt Hentschke Bau mit Abbruch (25 Feb 2025)
Claim 13 clm-36851c930f77bde5 descriptive
the monitoring flagged suspect areas; opened up, two places showed embrittled prestressing steel
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The city says the permanent monitoring had identified suspect areas; targeted openings and steel samples found the typical damage pattern of embrittled prestressing steel at two places.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Landeshauptstadt Dresden — Brücke Budapester Straße: Ab sofort Verkehrs- und Tonnagebeschränkung (8 May 2026)
Claim 14 clm-a0f064239c8ab225 quantitative
On 8 May 2026 the city cut traffic to one lane each way and a 7.5-tonne limit
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The report says Dresden responded on 8 May with traffic restrictions: one lane per direction remained and permissible weight was limited to 7.5 t.
Caveat
Scheduled buses and coaches remained exempt from the weight limit, according to the city.

Sources carrying this claim

  1. ingenieur.de — 326-t-Stresstest entscheidet über Schicksal der Budapester Brücke in Dresden
Claim 15 clm-7c814894475d0d8b descriptive
Six more wires snapped at axis C after the closure
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The city reports that since the closure six more prestressing wires had broken at axis C alone, as recorded by the acoustic emission monitoring.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Landeshauptstadt Dresden — Brücke Budapester Straße: Tiefbauarbeiten für „Not-Notunterstützung“ laufen (11 Jun 2026)
Claim 16 clm-56bea6c7baaf9ba5 descriptive
emergency steel props went in
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The June release describes four heavy-duty steel props as emergency support; the August release says the additional props were installed and work as intended.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Landeshauptstadt Dresden — Brücke Budapester Straße: Tiefbauarbeiten für „Not-Notunterstützung“ laufen (11 Jun 2026)
  2. Landeshauptstadt Dresden — Brücke Budapester Straße ab Montag, 24. August, wieder offen (19 Aug 2026)
Claim 17 clm-f22dc786c2235b66 quantitative
After a load test the bridge reopened on 24 August 2026 to buses and vehicles up to 7.5 tonnes, one lane each way and still without heavy traffic
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The city announces reopening from 24 August 2026 for buses and vehicles up to 7.5 tonnes, on one lane per direction, still without heavy goods traffic, after the load test.
Caveat
The city calls the load capacity sufficient in the medium term under the safety measures; its overall assessment was expected in November 2026.

Sources carrying this claim

  1. Landeshauptstadt Dresden — Brücke Budapester Straße ab Montag, 24. August, wieder offen (19 Aug 2026)
Claim 18 clm-960d80491327c58c quantitative
a reserve of at most 16 wire breaks within three metres
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The city states that the experts' critical limit is a reserve of at most 16 wire breaks within a three-metre zone.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Landeshauptstadt Dresden — Brücke Budapester Straße: Tiefbauarbeiten für „Not-Notunterstützung“ laufen (11 Jun 2026)
Claim 20 clm-5b4443b146b87fbd descriptive
the monitoring buys time to plan a replacement
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The city says the aim is to keep the bridge for at least ten more years and use that time to prepare an orderly replacement; in August it said the results give time to agree the goals for a new build.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Landeshauptstadt Dresden — Brücke Budapester Straße: Tiefbauarbeiten für „Not-Notunterstützung“ laufen (11 Jun 2026)
  2. Landeshauptstadt Dresden — Brücke Budapester Straße ab Montag, 24. August, wieder offen (19 Aug 2026)

Source dossiers and revision state

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 2026-11-06-baseline effective 2026-11-06 · created 2026-11-06

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

sha256:d315bbc37a5a9576717923844058b17f787c1333273e72413f0b1e45ad6a31a0
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
20
of 20 claims mapped
7
source dossiers
7
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Landeshauptstadt Dresden (Straßen- und Tiefbauamt), with commissioned engineering consultants evaluating the signals
Actor types
city-government, private
Funding model
public
Funding description
Not recorded
Cost
Load test on the Budapester Straße bridge: about €900,000; the cost of the monitoring itself is not published
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

7 source dossiers

MKP GmbH — Vorläufige Erkenntnisse zur Ursache und Hergang des Teileinsturzes der Carolabrücke (expert summary, 11 Dec 2024) dresden.de · 7 linked claims

Open original source ↗

Stable source ID
src-b44ec8652d3ffed5
Publisher
Name not classified · dresden.de
Type / language
pdf · language not classified
Published
2024-12-11
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-11-06
Dossier created
2026-11-06
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Two-page summary of the interim findings of the expert team led by Prof. Steffen Marx, on the MKP GmbH letterhead, published by the city: hydrogen-induced stress corrosion cracking initiated during construction as the main cause; the pre-collapse inspection regime, including crack-movement measurement of existing cracks; and acoustic emission monitoring with at least four weeks of prior measurement as the condition for reopening the waterway.

Descriptive only — not page/paragraph exact
Claims linked
Landeshauptstadt Dresden — Carolabrücke: Stadt beauftragt Hentschke Bau mit Abbruch (25 Feb 2025) dresden.de · 3 linked claims

Open original source ↗

Stable source ID
src-ececeec460084654
Publisher
Name not classified · dresden.de
Type / language
web-page · language not classified
Published
2025-02-25
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-11-06
Dossier created
2026-11-06
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

City press release: since 16 February 2025 the acoustic emission monitoring on the bridge recorded several wire breaks; citing acute risk of collapse, the city waived a tender and awarded the demolition directly; because no further breaks were recorded, ship-by-ship passages could be permitted again from 24 February 2025.

Descriptive only — not page/paragraph exact
Claims linked
Landeshauptstadt Dresden — Brücke Budapester Straße: Ab sofort Verkehrs- und Tonnagebeschränkung (8 May 2026) dresden.de · 3 linked claims

Open original source ↗

Stable source ID
src-4057cc586c245167
Publisher
Name not classified · dresden.de
Type / language
web-page · language not classified
Published
2026-05-08
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-11-06
Dossier created
2026-11-06
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

City press release: the permanent monitoring of the Budapester Straße bridge had flagged suspect areas; opened up, two places showed embrittled prestressing steel; 122 acoustic emission sensors and about 850 metres of fibre-optic sensing cover the structure, which was built with prestressing steel prone to stress corrosion cracking; the city aims to keep the bridge in service for ten more years.

Descriptive only — not page/paragraph exact
Claims linked
Landeshauptstadt Dresden — Brücke Budapester Straße: Tiefbauarbeiten für „Not-Notunterstützung“ laufen (11 Jun 2026) dresden.de · 4 linked claims

Open original source ↗

Stable source ID
src-ff101a91e0402d12
Publisher
Name not classified · dresden.de
Type / language
web-page · language not classified
Published
2026-06-11
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-11-06
Dossier created
2026-11-06
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

City press release: since the closure six more wires had snapped at axis C; the experts' critical limit is a reserve of at most 16 wire breaks within a three-metre zone; four heavy-duty steel props were being built as emergency support.

Descriptive only — not page/paragraph exact
Claims linked
ingenieur.de — 326-t-Stresstest entscheidet über Schicksal der Budapester Brücke in Dresden ingenieur.de · 2 linked claims

Open original source ↗

Stable source ID
src-e130e8d8fa7f9587
Publisher
Name not classified · ingenieur.de
Type / language
web-page · language not classified
Published
2026-08-09
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-11-06
Dossier created
2026-11-06
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Trade-press report ahead of the load test: the 1967 bridge contains prestressing steel from the former Hennigsdorf steelworks, similar to the Carolabrücke's; monitored since autumn 2024; on 8 May the city cut traffic to one lane each way and a 7.5-tonne limit; the load test with up to 326 t costs about €900,000.

Descriptive only — not page/paragraph exact
Claims linked
Landeshauptstadt Dresden — Brücke Budapester Straße ab Montag, 24. August, wieder offen (19 Aug 2026) dresden.de · 4 linked claims

Open original source ↗

Stable source ID
src-a8f80b877c56ea1f
Publisher
Name not classified · dresden.de
Type / language
web-page · language not classified
Published
2026-08-19
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-11-06
Dossier created
2026-11-06
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

City press release: after the load test the bridge reopens on 24 August 2026 to buses and vehicles up to 7.5 tonnes, one lane each way, still without heavy traffic; the city expects the damage to the wires to continue and an overall assessment in November 2026.

Descriptive only — not page/paragraph exact
Claims linked
Landeshauptstadt Dresden — Verkehrseinschränkungen an Brücke Budapester Straße und Nossener Brücke (3 Dec 2024) dresden.de · background

Open original source ↗

Stable source ID
src-366e5dd689e0c07c
Publisher
Name not classified · dresden.de
Type / language
web-page · language not classified
Published
2024-12-03
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-11-06
Dossier created
2026-11-06
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

City notice on lane closures for fitting the monitoring system to the Budapester Straße bridge, continuing installation work from November 2024. It names Marx Krontal Partner (Dresden/Weimar) as the firm commissioned to install and operate the monitoring system.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Known limits of this file
  • 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.