Hydrology – BLDGBLOG

Numbers Pool

[Image: “Solomon’s Pools & ancient aqueducts…,” via Library of Congress.]

There’s a beautiful description over at New Scientist of a hypothetical new form of computing device, a “liquid crystal computer” in which calculations would move “like ripples through the liquid.”

According to researchers Žiga Kos and Jörn Dunkel, calculations would be performed by—and registered as—crystal orientations in the liquid, induced or controlled by electromagnetism: “Electric fields could… be used to manipulate the molecules to perform basic calculations, similar to how simple circuits called logic gates work in an ordinary computer. Calculations on the proposed computer would appear as ripples spreading through the liquid.”

Liquid-supercomputer facilities of the near-future might thus resemble not server farms but aquatic centers, sealed interiors lined with reflecting pools kept in different electromagnetic regimes. Although the air inside is utterly still, you watch as small ripples bounce and roll across the surface of each pool, depths triggered by equations. Thinking machines masked as hydrologic infrastructure. Cisterns and aqueducts. Computational hydrology.

There’s a line by William S. Burroughs that I probably quote too often, but I’m nevertheless reminded of again here. Burroughs once described “a vast mineral consciousness near absolute zero thinking in slow formations of crystal,” but perhaps this new vision is more akin to an oceanic consciousness thinking in slow tides and currents, liquid crystal waves of calculation breaking through the deep.

[Image: “The ancient swimming pool at Bath,” via Library of Congress.]

Briefly, given the prevalence of cauldron imagery in Western myth, there is something almost folkloristic about the idea of liquid technologies such as this—pools that can model the future or offer visions of other worlds.

In fact, it tangentially brings to mind another wild proposal: constructing the “Ultimately Large Telescope” [PDF], a vast spinning cauldron on the moon, reflecting astral light from a facility constructed inside the darkness of a lunar crater.

This hypothetical telescope, Universe Today explains, “would rely on liquids rather than coated glass (making it much cheaper to transport to the Moon). One type of liquid would be arranged in a spinning vat while a second metallic liquid (like mercury, which is reflective) would be positioned on top. The vat would spin continuously to keep the surface of the liquid in the correct parabolic shape to work as a mirror.” A witches’ cauldron on the moon, peering into space.

The Terrestrial Status of Boston

The terrestrial status of Boston is an unexpectedly fascinating topic. A city built on land rescued from the sea, it is not only unusually at risk from sea-level rise; it also hides parts of its marshy past beneath its streets and buildings.

As a project by the Norman B. Leventhal Map & Education Center recently wrote, “No city in the U.S. has a more striking history of landmaking than Boston, with about a sixth of its present land area sitting on estuaries, mudflats, coves, and tidal basins that would have been submerged at high tide prior to the seventeenth century. Mapping the growth of the city into the surrounding ocean has been an interest of Boston’s geographers for centuries, and our modern maps of shoreline change are some of the most popular objects in our digital collections.”

[Image: Boston, courtesy of the Norman B. Leventhal Map & Education Center.]

Indeed, the Wall Street Journal explained last year, some of Boston’s most expensive houses are more like docks or wharves, sitting atop wooden pilings driven deep into flooded ground. In one specific case, “the underground wooden pilings supporting the foundation had been rotting for years, to the point where the building’s walls were ‘almost floating,’ [the home’s owner] recalled.”

Recall the the incredible story of William Walker, a diver who “saved” Winchester Cathedral in England by diving beneath it for a period of six years, repairing its aquatic foundations from below. “When huge cracks started to appear in the early 1900s,” we read, “the Cathedral seemed in danger of complete collapse. Early efforts to underpin its waterlogged foundations failed until William Walker, a deep-sea diver, worked under water every day for six years placing bags of concrete.”

Ben Affleck’s next movie, perhaps—scuba diving beneath the streets of Boston and saving the city from below…

While the bulk of the Leventhal Center’s project focuses on the economic value of reclaimed land in the Boston area—what they call “the ultimate financial asset: brand-new urban land, ready for development”—there is at least one amazing detail I wanted to post here.

Like buried ships in New York City and San Francisco, Boston has its own maritime archaeology: “Sophisticated networks of fish weirs can still be found buried beneath the streets of the [Back Bay] neighborhood, which were laid out in a tidily gridded pattern in the nineteenth century to facilitate the engrossment and sale of property.” Indigenous hydrological infrastructure, hiding in plain sight.

Writing just today, meanwhile, in an op-ed for WBUR, Courtney Humphries suggests that, ironically, Boston’s future survival might depend on doing more of what got it into trouble with the sea in the first place: building more land and further modifying the shoreline.

What future weirs and dams and levees and pilings, architectural anchorages all, might we see beneath the streets of Boston, a city halfway between terrestrial and maritime, ground and ocean, bedrock and marsh, in the years to come?

Terrestrial Warfare, Drowned Lands

While looking at maps of rural New York State, roughly 70 miles northwest of Manhattan, near the border with New Jersey, I noticed a series of small communities called “Islands.” Pine Island, Maple Island, Black Walnut Island, Pellets Island, etc.—these are tiny hamlets otherwise surrounded by dry land, well away from the sea, the Hudson, or any other large bodies of water.

It turns out these are the “drowned lands of the Wallkill,” a river with such an irregular bed, that so commonly flooded every season, that high points in the landscape would become temporary islands.

According to The History of Sussex and Warren Co., NJ by James P. Snell, it wasn’t until legislation was passed in 1807—creating wonderfully named “drowned-land commissioners”—that the region was eventually drained.

Briefly, anyone interested in liminal landscapes should find Snell’s description of the Drowned Lands, prior to their drainage, fascinating. The Wallkill itself had no real path or bed, Snell explains, the meadows it flowed through were naturally dammed at one end by glacial boulders from the Ice Age, the whole place was clogged with “rank vegetation,” malarial pestilence, and tens of thousands of eels, and, what’s more, during flood season “the entire valley from Denton to Hamburg became a lake from eight to twenty feet deep.”

The landscape is also almost literally Biblical: “On the Southwestern border of the swamp, in the town of Warwick, two lofty and isolated mountains rear their summits. They are called Adam and Eve. Formerly they swarmed with rattlesnakes, but these the inhabitants have exterminated.”

In any case, this eerie, terrestrial-aquatic borderland—reminiscent of John Langan’s novel The Fisherman—was radically redesigned following the construction of a large drainage canal and a subsequent series of dams.

But the dams were controversial, and this is where things get novelistic.

A half-century of “war” broke out among local supporters of the dams and their foes: “The dam-builders were called the ‘beavers’; the dam destroyers were known as ‘muskrats.’ The muskrat and beaver war was carried on for years,” with skirmishes always breaking out over new attempts to dam the floods.

Here’s one example, like a scene written by Victor Hugo transplanted to New York State: “A hundred farmers, on the 20th of August, 1869, marched upon the dam to destroy it. A large force of armed men guarded the dam. The farmers routed them and began the work of destruction. The ‘beavers’ then had recourse to the law; warrants were issued for the arrest of the farmers. A number of their leaders were arrested, but not before the offending dam had been demolished. The owner of the dam began to rebuild it; the farmers applied for an injunction. Judge Barnard granted it, and cited the owner of the dam to appear and show cause why the injunction should not be made perpetual. Pending a final hearing, high water came and carried away all vestige of the dam.”

And so on and so forth, dams rising and falling, lands drowning and being drained again, farmers pitted against hydrologists, for generations. You can easily imagine this as the backdrop for a historical epic, set within a day’s journey from Manhattan on the cusp of modernity, a family committed to raising land from ambiguity and murk colliding with primordial forces led by hostile neighbors dedicated to maintaining inundation.

Two visions of landscape, at war.

Today, the land is hugely fertile and apparently a great source of topsoil; it has become known as the Black Dirt Region. You can even buy Black Dirt Bourbon.

But still, these isolated hills and ridges call themselves islands, as if awaiting the return of the flood.

(All images via Google Maps. Vaguely related on BLDGBLOG: Tactical Landscaping and Terrain Deformation; readers might also enjoy David Blackbourn’s superb book, The Conquest of Nature: Water, Landscape, and the Making of Modern Germany.)

Drawing Science/Drawing Fiction

I’ve been remiss in posting about a graduate course I’ll be co-teaching with the brilliant Nicholas de Monchaux up at UC Berkeley for the 2018-2019 academic year. The application period is currently open through December 2017.

Called “Drawing Science/Drawing Fiction: The Future of Californian Ecology,” the year-long Master’s course will be a combination of architectural design, experimental drawing methods, and narrative speculation, exploring what de Monchaux calls a “new relationship between architecture, media, ecology, and craft.”

The idea is to look ahead, not just at the future of California, but at the future of what California represents: cutting-edge industrial design, the global cinematic imagination, unparalleled demographic integration, agricultural innovation, adaptive infrastructure, and, of course, the risks of climate change.

[Image: From David Maisel’s “The Lake Project”; used with permission of the artist].

With the entire state of California at their disposal, students will be able to focus on everything from the U.S./Mexico border to the San Andreas Fault, from Silicon Valley and space tourism to the sci-fi productions of Hollywood. Agriculture, Artificial Intelligence, electric cars; species loss, wildfire, drought; policing, governance, human labor.

There are architectural scenarios to design and explore for all of these.

[Image: California’s Ivanpah Solar Energy Generating System photographed by Ethan Miller for Getty Images, via The Atlantic].

In an interview with Boom California published in 2014, novelist Kim Stanley Robinson—who was also interviewed here on BLDGBLOG way back in 2007—commented on the science-fictional appeal of California. By the time he went to college, he remarked, the landscape of the state had fundamentally changed; it was being terraformed for human habitation by the forces of industry and suburban development.

California, he realized, was itself a design project.

[Images: From David Maisel’s “The Lake Project”; used with permission of the artist].

Robinson explained to Boom that, in the blink of an eye, California became a “completely different landscape. At that same time I started reading science fiction (…) and it struck me that it was an accurate literature, that it was what my life felt like; so I thought science fiction was the literature of California. I still think California is a science fictional place. The desert has been terraformed. The whole water system is unnatural and artificial. This place shouldn’t look like it looks, so it all comes together for me. I’m a science fiction person, and I’m a Californian.”

Science fiction is the literature of California.

[Image: Early rendering for Michael Maltzan’s Six Street Viaduct in Los Angeles].

Briefly, this theme was developed further by an essay by Michael Ziser published in the same issue of Boom. “Postwar science fiction is to a surprising degree a phenomenon of the western United States,” Ziser wrote. It was also quite specifically Californian.

“As the producers of Golden Age sci-fi were lured to the region by the new economic opportunities available to writers in the pulp, television, and film industries of Southern California,” Ziser continued, “they were also drawn into an imaginative relationship with California’s physical novelty as a place sprung de novo from the plans of hydraulic engineers, road builders, and tract housing developers.”

Many of the major themes of science fiction in this period—the experience of living in an arid Martian colony, the palpable sense of depending in a very direct way on large technological systems, unease with the scope and direction of the military and aeronautics industries, the navigation of new social rules around gender and race—can be read as barely veiled references to everyday life in California. For sci-fi writers, teasing out the implications of an era in which entire new civilizations could be conjured almost from nothing through astonishing feats of engineering and capital was a form of realism. They were writing an eyewitness account of what was the most radical landscape-scale engineering project in the history of the world.

This idea of an “imaginative relationship with California’s physical novelty” is something we will be exploring in architectural form throughout the Studio One experience. In the process, we will approach California itself as a subject of design and compare the state to other regions currently experiencing their own de novo re-inventions, whether it’s a thawing Arctic or China’s ongoing building boom.

[Image: Floating caisson during the construction of the original Bay Bridge; photo by Clyde Sunderland, courtesy Library of Congress].

To develop and articulate their visions, students will be pushed to experiment with new forms of architectural representation, modeling, and drawing—or, as de Monchaux writes, “Our chief medium will be drawing, but we will engage and embrace a world of devices and tools—from scripting through mapping and virtual reality-that are changing, and expanding, the capacity of architecture to influence the world.”

I will be up in the Bay Area multiple times for this throughout the academic year, although not on a full-time basis; if you’re a fan of de Monchaux’s work, of science fiction, of architecture, of design’s potential for conjuring radical visions of landscape futures, then please consider applying. You have roughly two more months to do so.

[Image: Farming California, via Google Maps].

More information is available over at UC Berkeley.

Warnings Along the Inundation Line

[Image: Cover from An Incomplete Atlas of Stones by Elise Hunchuck].

After the Tōhoku tsunami in 2011, one of the most ominous details revealed about the coast where it struck, for those of us not familiar with the region, was that a series of warning stones stand there overlooking the sea, carved with sayings such as, “Do not build your homes below this point!”

As part of her recent thesis at the Daniels Faculty of Architecture, Landscape, and Design—a school of the University of Toronto—landscape architect Elise Hunchuck spent the summer of 2015 traveling around Japan’s Sanriku coast, documenting every available tsunami stone in photographs, maps, and satellite views, and accumulating seismic and geological data about each stone’s local circumstances.

The end result was a book called An Incomplete Atlas of Stones. It was inspired, she writes, by “a combined interest in warning systems and cartography.”

[Image: From An Incomplete Atlas of Stones by Elise Hunchuck].

“Rising from the earth,” Hunchuck writes in the book’s introduction, “many [of the warning stones] were placed in the landscape to mark either the height of the inundation line or to mark territory above the inundation line.”

They formed a kind of worst-case boundary line for where solid land meets the sea, the known limit of catastrophic inundation.

[Images: Spreads from An Incomplete Atlas of Stones by Elise Hunchuck].

The book introduces each stone taxonomically:

Each tsunami stone is introduced by its geographic coordinates: latitude, longitude, and elevation. Latitude and longitude site each stone on the surface of the earth while elevation situates each stone in relation to the mean level of the sea. The stones are further situated; first, by the boundaries of the village, town, or city they are located within; second, by their administrative prefecture; and, third, their geographical region. As each stone has been erected in response to a major tsunami, both the year and name of the tsunami is listed in addition to the stone’s relation to the inundation line (below the line, on the line, or above the line) of both its target tsunami and the tsunami of 2011. Each stone, at the time of its erection, was engraved with a message. The stones mapped in this atlas may be considered as belonging to one of two categories: as a memorial, commemorating people and places lost to an earthquake tsunami, or as a lesson, providing a description of events and directions as to where to build, where to evacuate to, and where waters have risen in the past.

Each stone or set of stones thus gets a four-page spread, giving the book a nice structural consistency.

[Images: Spreads from An Incomplete Atlas of Stones by Elise Hunchuck].

As you can also see, satellite shots are used to show the landscape at different states in time: one depicts the coastline immediately following the 2011 tsunami, the next then showing the same locatio after up to five years of rebuilding have taken place.

In some of these comparisons, seemingly nothing at all has changed; in others, it appears nearly the entire landscape has been consumed by forests.

[Images: Spreads from An Incomplete Atlas of Stones by Elise Hunchuck].

The entire book is nearly 250 pages in length, and the selections I’ve chosen here barely scratch the surface. The material Hunchuck has gathered would not only be served well by a gallery installation; the project also sets up an interesting formal precedent for other documentary undertakings such as this.

Given my own background, meanwhile—I am a writer, not an architect—I would love to see more of a reporting angle in future versions of this sort of thing, e.g. interviews with local residents, or even with disaster-response workers, connected to these landscapes through personal circumstance.

The narratives of what these stones are and what they mean would be well-illustrated by more than just data, in other words, including verbal expressions of how and why these warnings were heeded (or, for that matter, fatally overlooked).

[Images: Spreads from An Incomplete Atlas of Stones by Elise Hunchuck].

In any case, the title of Hunchuck’s book—it is an incomplete atlas—also reveals that Hunchuck is still investigating what the stones might mean and how, as a landscape architect, she might respond to them. Her goal, she writes, “is not to offer an explicit response—yet. This incomplete atlas shares the stories of seventy five places, each without a definitive beginning or end.”

Along those lines, I’m reminded of a geologist quoted by the New York Times in their own coverage of the megaliths: “We need a modern version of the tsunami stones.”

Stay tuned for Hunchuck’s forthcoming website with more about the project.

(Vaguely related: Boundary Stones and Capital Magic and, to a certain extent, Watermarks.)

Under the Dome

[Image: Courtesy U.S. Department of the Interior Bureau of Ocean Energy Management (BOEM)].

A gigapixel bathymetric map of the Gulf of Mexico’s seabed has been released, and it’s incredible. The newly achieved level of detail is almost hard to believe.

[Images: Courtesy U.S. Department of the Interior Bureau of Ocean Energy Management (BOEM)].

The geology of the region is “driven not by plate tectonics but by the movement of subsurface bodies of salt,” Eos reported last week. “Salt deposits, a remnant of an ocean that existed some 200 million years ago, behave in a certain way when overlain by heavy sediments. They compact, deform, squeeze into cracks, and balloon into overlying material.”

This means that the bottom of the Gulf of Mexico “is a terrain continually in flux.”

How the salt got there is the subject of a long but fascinating description at Eos.

It is hypothesized that the salt precipitated out of hypersaline seawater when Africa and South America pulled away from North America during the Triassic and Jurassic, some 200 million years ago. The [Gulf of Mexico] was initially an enclosed, restricted basin into which seawater infiltrated and then evaporated in an arid climate, causing the hypersalinity (similar to what happened in the Great Salt Lake in Utah and the Dead Sea between Israel and Jordan).

Salt filled the basin to depths of thousands of meters until it was opened to the ancestral Atlantic Ocean and consequently regained open marine circulation and normal salinities. As geologic time progressed, river deltas and marine microfossils deposited thousands more meters of sediments into the basin, atop the thick layer of salt.

The salt, subjected to the immense pressure and heat of being buried kilometers deep, deformed like putty over time, oozing upward toward the seafloor. The moving salt fractured and faulted the overlying brittle sediments, in turn creating natural pathways for deep oil and gas to seep upward through the cracks and form reservoirs within shallower geologic layers.

These otherwise invisible landscape features “oozing upward” from beneath the seabed are known as salt domes, and they are not only found at the bottom of the Gulf of Mexico.

[Image: Avery Island, Louisiana, archived by the U.S. Library of Congress].

The black and white photos you see here are from a salt mine on Avery Island, Louisiana, archived by the U.S. Library of Congress. The photos date back as far as 1900, and they’re gorgeous.

[Image: Avery Island, Louisiana, archived by the U.S. Library of Congress].

This is what it looks like inside those salt domes, you might way, once industrially equipped human beings have carved wormlike topological spaces into the deformed, ballooning salt deposits of the region.

[Image: Avery Island, Louisiana, archived by the U.S. Library of Congress].

Obviously, the Gulf of Mexico is not the only salt-rich region of the United States; there is a huge salt mine beneath the city of Detroit, for example, and the nation’s first nuclear waste repository, the Waste Isolation Pilot Plant, or WIPP—which my wife and I had the surreal pleasure of visiting in person back in 2012—is dug into a huge underground salt deposit near the New Mexico/Texas border.

[Image: Inside WIPP; photo by Nicola Twilley].

Nonetheless, the Louisiana/Gulf of Mexico salt dome region has lent itself to some particularly provocative landscape myths.

You might recall, for example, the story of Lake Peigneur, an inland body of water that was almost entirely drained from below when a Texaco drilling rig accidentally punctured a salt dome beneath the lake.

This led to the sight of a rapid, Edgar Allan Poe-like maelström of swirling water disappearing into the abyss, pulling no fewer than eleven barges into the terrestrial deep.

[Image: Avery Island, Louisiana, archived by the U.S. Library of Congress].

But there is also the story of Bayou Corne, one of my favorite conspiracy theories of all time.

[Images: Avery Island, Louisiana, archived by the U.S. Library of Congress].

As the New York Times reported back in 2013, “in the predawn blackness of Aug. 3, 2012, the earth opened up—a voracious maw 325 feet across and hundreds of feet deep, swallowing 100-foot trees, guzzling water from adjacent swamps and belching methane from a thousand feet or more beneath the surface.”

One resident of the area is quoted as saying, “I think I caught a glimpse of hell in it.”

More than a year after it appeared, the Bayou Corne sinkhole is about 25 acres and still growing, almost as big as 20 football fields, lazily biting off chunks of forest and creeping hungrily toward an earthen berm built to contain its oily waters. It has its own Facebook page and its own groupies, conspiracy theorists who insist the pit is somehow linked to the Gulf of Mexico 50 miles south and the earthquake-prone New Madrid fault 450 miles north. It has confounded geologists who have struggled to explain this scar in the earth.

To oversimplify things, the overall theory—that is, the conspiratorial part of all this—is that the entire landscape of the Gulf region is on the verge of subterranean dissolution. The very salt deposits so beautifully mapped by the Bureau of Ocean Energy Management are all lined up for eventual flooding.

As this vast underground landscape of salt dissolves, everything from east Texas to west Florida will be sucked down into the abyss.

[Image: Avery Island, Louisiana, archived by the U.S. Library of Congress].

It’s unlikely that this will happen, I should say. You can sleep well at night.

In the meantime, the sorts of salt-mining operations depicted here in these photographs have carved their worming, subterranean way into the warped terrains of salt that dynamically ooze their way up to the surface from geological prehistory.

[Image: Avery Island, Louisiana, archived by the U.S. Library of Congress].

Be sure to check out the full gigapixel BOEM map, and the helpful write-up over at Eos is worth a read, as well. As for the Bayou Corne conspiracy—I suppose we’ll just have to wait.

(Bathymetric maps spotted via Chris Rowan; salt mine photos originally spotted a very long time ago via Attila Nagy).

The Remnants

[Image: From An Enduring Wilderness: Toronto’s Natural Parklands by Robert Burley].

Photographer Robert Burley has a new book due out in two weeks called An Enduring Wilderness: Toronto’s Natural Parklands.

[Images: From An Enduring Wilderness: Toronto’s Natural Parklands by Robert Burley].

While it would seem at first to be only of local interest to those living in and around Toronto, the photos themselves are gorgeous and the conditions they document are nearly universal for other North American cities: scenes of natural, remnant ecosystems butting up against, but nonetheless resisting, the brute force of urban development.

[Image: From An Enduring Wilderness: Toronto’s Natural Parklands by Robert Burley].

As Burley explains, many of the parks depicted are informal—that is, they are undesigned—and almost all of them follow old creeks and ravines that meander through the ancestral terrain. (This, as you might recall, is also the premise for much of Michael Cook’s work, who has been tracking those same waterways in their Stygian journey underground.)

[Images: From An Enduring Wilderness: Toronto’s Natural Parklands by Robert Burley].

However, Burley warns, “these ravine systems are in danger of being loved to death by city dwellers desperate for green space.” From the book:

Toronto has one of the largest urban park systems in the world, and yet it is unknown to most, including many of the city’s three million inhabitants. This extensive ravine network of sunken rivers, forested vales, and an expansive shoreline has historically been overlooked, neglected, or forgotten, but in recent years these unique wild spaces have been rediscovered by a growing population embracing nature inside the city limits. The parklands were not designed or constructed for a greater public good but rather are landscape remnants of pre-settlement times that have stubbornly refused to conform to urban development.

The book comes out later this month, and a number of events are planned in Toronto over the coming week, including an exhibition of Burley’s work from the book; more info is available at the John B. Aird Gallery.

Voids and Vacuums

[Image: Google Maps view of Mosul Dam (bottom center) and the huge reservoir it creates].

Dexter Filkins—author of, among other things, The Forever War—has a long new piece in the first 2017 issue of The New Yorker about the impending collapse of Iraq’s Mosul Dam.

The scale of the potential disaster is mind-boggling.

If the dam ruptured, it would likely cause a catastrophe of Biblical proportions, loosing a wave as high as a hundred feet that would roll down the Tigris, swallowing everything in its path for more than a hundred miles. Large parts of Mosul would be submerged in less than three hours. Along the riverbanks, towns and cities containing the heart of Iraq’s population would be flooded; in four days, a wave as high as sixteen feet would crash into Baghdad, a city of six million people. “If there is a breach in the dam, there will be no warning,” Alwash said. “It’s a nuclear bomb with an unpredictable fuse.”

Indeed, “hundreds of thousands of people could be killed,” according to a UN report cited by Filkins.

What’s interesting from a technical perspective is why the dam is so likely to collapse. It’s a question of foundations. The dam was built, Filkins writes, on rock “interspersed with gypsum—which dissolves in contact with water. Dams built on this kind of rock are subject to a phenomenon called karstification, in which the foundation becomes shot through with voids and vacuums.”

Filling those voids with grout is now a constant job, requiring dam engineers to pump huge amounts of cementitious slurry down into the porous rock in order to replace the dissolved gypsum.

[Image: Mosul Dam spillway; photo by U.S. Army Staff Sgt. Brendan Stephens].

At one point, Filkins goes inside the dam where “engineers are engaged in what amounts to an endless struggle against nature. Using antiquated pumps as large as truck engines, they drive enormous quantities of liquid cement into the earth. Since the dam opened, in 1984, engineers working in the gallery have pumped close to a hundred thousand tons of grout—an average of ten tons a day—into the voids below.”

Finding and caulking these voids, Filkins writes, is “deeply inexact.” They are deep underground and remain unseen; they have to be inferred. The resulting process is both absurd and never-ending.

The engineers operating [the grout pumps] can’t see the voids they are filling and have no way of discerning their size or shape. A given void might be as big as a closet, or a car, or a house. It could be a single spacious cavity, requiring mounds of grout, or it could be an octopus-like tangle, with winding sub-caverns, or a hairline fracture. “We feel our way through,” [deputy director Hussein al-Jabouri] said, standing by the pump. Generally, smaller cavities require thinner grout, so Jabouri started with a milky solution and increased its thickness as the void took more. Finally, after several hours, he stopped; his intuition, aided by the pressure gauges, told him that the cavity was full. “It’s a crapshoot,” [civil engineer Azzam Alwash] told me. “There’s no X-ray vision. You stop grouting when you can’t put any more grout in a hole. It doesn’t mean the hole is gone.”

It’s hard not to think of a scene in Georges Perec’s novel Life: A User’s Manual, a scene I have written about before. There, a character named Emilio Grifalconi picks up an old, used table only to find that the support column at its center is “completely worm-eaten.” Slowly, painstakingly, operating by intuition, he fills the worm-eaten passages with a permanent adhesive, “injecting them with an almost liquid mixture of lead, alum and asbestos fiber.”

The table collapses anyway, alas, giving Grifalconi an idea: “dissolving what was left of the original wood” in order to “disclose the fabulous arborescence within, this exact record of the worms’ life inside the wooden mass: a static, mineral accumulation of all the movements that had constituted their blind existence, their undeviating single-mindedness, their obstinate itineraries; the faithful materialization of all they had eaten and digested as they forced from their dense surroundings the invisible elements needed for their survival, the explicit, visible, immeasurably disturbing image of the endless progressions that had reduced the hardest of woods to an impalpable network of crumbling galleries.”

Whether or not such a rhizomatic tangle of grout-filled chambers, linked “voids and vacuums” like subterranean grapes, could ever be uncovered and explored beneath the future ruins of a safely dismantled Mosul Dam is something I will leave for engineers.

[Image: Mosul Dam water release; photo by U.S. Army Staff Sgt. Brendan Stephens].

However, Filkins points out one possible solution that would sidestep all of this: this option, he writes, “which has lately gained currency, is to erect a ‘permanent’ seal of the existing dam wall—a mile-long concrete curtain dropped eight hundred feet into the earth.”

This would not be the only huge subterranean wall to be proposed recently: think of the “giant ice wall” under construction beneath the Fukushima nuclear power plant in Japan: “Japan is about to switch on a huge refrigeration system that will create a 1.5-km-long, underground frozen ‘wall,’ in hopes of containing the radioactive water that’s spilling out of the Fukushima nuclear power plant, which went into meltdown following the earthquake and tsunami of March 2011.”

The Soft Spot

geoborder [Image: Close-up of the 2010 State Geologic Map of California].

An interesting story published last month in the L.A. Times explored the so-called “sweet spot” for digging tunnels along the California/Mexico border.

“Go too far west,” reporter Jason Song explained, “and the ground will be sandy and potentially soggy from the water of the Pacific Ocean. That could lead to flooding, which wouldn’t be good for the drug business. Too far east and you’ll hit a dead end of hard mountain rock.”

However, Song continues, “in a strip of land that runs between roughly the Tijuana airport and the Otay Mesa neighborhood in San Diego, there’s a sweet spot of sandstone and volcanic ash that isn’t as damp as the oceanic earth and not as unyielding as stone.”

More accurately speaking, then, it is less a sweet spot than it is a soft one, a location of potential porosity where two nations await subterranean connection. It is all a question of geology, in other words—or the drug tunnel as landscape design operation.

border [Image: Nogales/Nogales, via Google Maps].

With the very obvious caveat that this next article is set along the Arizona/Mexico border, and not in the San Diego neighborhood of Otay Mesa, it is nonetheless worth drawing attention back to an interesting article by Adam Higginbotham, written in 2012 for Bloomberg, called “The Narco Tunnels of Nogales.”

There, Higginbotham describes a world of abandoned hotel rooms in Mexico linked, by tunnel, to parking spots in the United States; of streets subsiding into otherwise unknown narco-excavations running beneath; and of an entire apartment building on the U.S. side of the border whose strategic value is only revealed later once drug tunnels begin to converge in the ground beneath it.

Here, too, though, Higginbotham also refers to “a peculiar alignment of geography and geology,” noting that the ground conditions themselves are particularly amenable to the production of cross-border subterranea.

However, the article also suggests that “the shared infrastructure of a city”—that is, Nogales, Arizona, and its international counterpart, Nogales, Mexico—already, in a sense, implies this sort of otherwise illicit connectivity. It is literally built into the fabric of each metropolis:

When the monsoons begin each summer, the rain that falls on Mexico is funneled downhill, gathering speed and force as it reaches the U.S. In the 1930s, in an attempt to control the torrent of water, U.S. engineers converted the natural arroyos in Nogales into a pair of culverts that now lie beneath two of the city’s main downtown streets, Morley Avenue and Grand Avenue. Beginning in Mexico, and running beneath the border before emerging a mile into the U.S., the huge tunnels—large enough to drive a car through—created an underground link between the two cities, and access to a network of subterranean passages beneath both that has never been fully mapped.

This rhizomatic tangle of pipes, tubes, and tunnels—only some of which are official parts of the region’s hydrological infrastructure—results in surreal events of opportunistic spelunking whereby “kids would materialize suddenly from the drainage grates,” or “you would see a sewer plate come up in the middle of the street, and five people would come up and run.”

Briefly, I’m reminded of a great anecdote from Jon Calame’s and Esther Charlesworth’s book Divided Cities, where the split metropolis of Nicosia, Cyprus, is revealed to be connected from below, served by a shared sewage plant “where all the sewage from both sides of the city is treated.” The authors interview the a local waste manager, who jokes that “the city is divided above ground but unified below.”

In any case, the full article is worth a read, but a tactical geological map revealing sites of likely future tunneling would be a genuinely fascinating artifact to see. I have to assume that ICE or Homeland Security—let alone the cartels—already have such a thing.

(L.A. Times article originally spotted via Nate Berg).

An exceptional, extreme, and largely unexplored place

The always interesting Center for Land Use Interpretation is seeking proposals from artists, writers, designers, architects, and more to “explore the land and waterscape of the north arm of the Great Salt Lake, known as Gunnison Bay.”

It’s a landscape they describe as “an exceptional, extreme, and largely unexplored place”:

The construction of a filled-in railroad causeway in the late 1950s cut the original lake in half, creating a new, anthropogenic entity, more isolated and saline, that has evolved into a landscape of desiccation that resembles another planet, or this one in some past or future time.

They specifically hope that you’ll include in your exploration of this seemingly parallel terrestriality the so-called Great Salt Lake Exploration Platform, or GSLEP, a pontoon structure built by Chris Taylor and Steve Badgett (it’s a boat).

Proposals are due March 1, 2016.

There is much more information over at CLUI’s website, so check out the full call-for-proposals.

The Dam Industry’s Chernobyl

There’s an alarming new piece up at The New Yorker looking at two potential dam failures, in Iraq and Zambia, and the extraordinary effects these disasters would have. The collapse of Iraq’s Mosul Dam, for example, which the U.S. Army Corps of Engineers calls “the most dangerous dam in the world,” “could drown as many as five hundred thousand people downstream and leave a million homeless.” The collapse of Zambia’s Kariba Dam, meanwhile, and the resulting megaflood would be “the dam industry’s Chernobyl”: “three million people live in the flood’s path; most would die or lose their crops or possessions. About forty per cent of the electricity-generating capacity of twelve southern African nations would be eliminated.” (Spotted via @waltonwater)