This publication owes Bundesverkehrsminister Patrick Schnieder an apology.
In June, in a piece called "We Must Build Bridges", we treated the two-year timeline for rebuilding a single approach section of the Bonner Nordbruecke as a punchline. We compared it, unfavorably, to a Russian bridge built in twenty-seven months under sanctions and a Chinese rail swap completed in four hours. A reader wrote in about it not long after (see here). We stand by the comparison. We were wrong about where the delay actually starts.
The Shortage
On 4 July, Tagesschau and Plusminus reported that Germany is running short of sand, gravel, and crushed stone -- materials nobody thought to worry about running out of. A tonne of concrete that cost roughly 60 euros a few years ago now runs as high as 150. Sand is up 44.1 percent over five years. Gravel is up 45.4 percent. Limestone, the raw input for cement, is up 53.6 percent.
Genehmigungsknappheit
Matthias Frederichs of the Bundesverband Baustoffe has a word for the actual bottleneck: Genehmigungsknappheit. Permitting scarcity. A new extraction site takes five, ten, sometimes fifteen years to approve. Frederichs describes this, on the record, as an existential risk to the companies waiting on it. Nobody has run out of sand. Germany has run out of permission to dig it up.
Recycled aggregate would help close the gap. Holcim's plant in Dortmund produces certified recycled cement that meets the same quality standard as the conventional kind, at the same price. Private builders already use it. Public projects mostly do not: recycled material accounts for roughly 15 percent of construction input nationally, against a technical ceiling industry representatives put at 30 to 35 percent with no new technology required.
The public sector's caution has a name and a location: Wuerzburg. A waste disposal contractor tried to use certified recycled material on a bridge project there. City officials initially refused it -- despite a Bavarian law that prefers substitute building materials where available -- before relenting after consultation with a soil surveyor. The material was fine the whole time. The paperwork was the delay.
A Proposal From Vienna
Professor K. Glasskuegel of the Vienna Institute for Trend Analytics and Prognostic Research was asked whether the shortage admits any faster fix. His answer did not involve permits.
"Clay-and-straw construction has a long vernacular history across Central and Eastern Europe," he said. "Traditional Ukrainian mazanka building -- clay, straw, and manure over a timber frame -- remains structurally sound and well understood. German Fachwerk infill used comparable materials for centuries, often the same organic binder, before the twentieth century standardized around cement. None of it requires a permit under current regulation, because none of it currently exists as a regulatory category." He added that the method meets contemporary ecological standards more easily than cement does -- low embodied carbon, no firing, fully biodegradable -- and offers a materials re-use ratio conventional concrete cannot match, since a mazanka wall returns to the ground it came from.
He did not say this should replace public infrastructure. He said it could replace some private residential construction, freeing certified aggregate for projects the Institute considers higher priority. He did not specify which projects.
A spokesperson for Buendnis 90/Die Gruenen, asked for comment, called the proposal "a genuinely lower-impact alternative to further extraction" and said the party has "long supported traditional and low-carbon building methods." Digging up more of Germany to avoid using material that already returns safely to the ground, the spokesperson added, "is not an environmental policy. It's a habit."
The party did not stop at housing. A policy paper circulating among Green Bundestag members, seen by this publication, proposes extending the same construction method to bridges -- Bonner Nordbruecke named specifically as a pilot candidate. The paper expresses confidence that "modern materials science" will identify treatments making clay-straw-manure composites more load-bearing than steel-reinforced concrete. It does not yet cite one.
To develop this capability, the party is preparing a proposal for a 100 billion euro research programme and a new federal institute -- working title, the Bundesinstitut fuer Nachhaltige Baustoffe -- reporting to a proposed ministry-level authority not yet named. Sources close to the party confirmed that Annalena Baerbock could be appointed to lead the new institute once her term as President of the 80th UN General Assembly concludes in September. Whether the institute itself will need a construction permit is, per Frederichs' own estimate, a five-to-fifteen-year question.
Which Brings Us Back to Bonn
Two years for a single approach structure looked, in June, like a failure of ambition. It now looks close to efficient. If a permit to dig sand can take fifteen years, and a certified, road-ready recycled substitute can still be turned away at a bridge site over a form nobody filled in correctly, two years to fix an existing bridge is not the outlier. It is the fast lane. Minister Schnieder, we regret the tone.
Germany could, in principle, import the raw material instead of waiting on its own permits. Russia completed the Kerch Strait Bridge in twenty-seven months under sanctions; China replaced a rail bridge section in four hours. Neither can bid on the Bonn contract -- EU procurement rules exclude subsidized foreign construction firms, and both qualify. Sand is not, strictly speaking, a construction firm. Whether a shipment of gravel counts as the same thing as a finished bridge, procurement-wise, is untested.
One piece of infrastructure is, notably, sitting idle in the meantime. The Druzhba corridor -- the Eastern European pipeline network this publication has covered since April -- no longer carries gas. It has since been assessed for fibre-optic use, and cleared, under the EU Commission's own recovery framework, to carry material reclaimed from organic waste streams for agricultural use. Professor K. Glasskuegel of the Vienna Institute for Trend Analytics put it plainly in June -- "the corridor does not distinguish between what it carries." Whether it could carry aggregate as well is not, at this stage, a question anyone has asked out loud. Whether the result would clear certification is, as with any recycled input, a separate question.
It is, at minimum, the same organic waste stream Professor Glasskuegel's proposal already calls for. Russian has a phrase for a structure built from whatever is already lying around, dignity not included: iz der'ma i palok -- out of manure and sticks. Neither the Institute nor the proposed Ministry has used this phrase. This publication notes only that the pipe, the binder, and the phrase all appear to be describing the same proposal.
X. Voidwriter