Tag Archives: infrastructure

Limit power outages by burying power lines

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An editorial from USA Today argues for burying power lines in order to limit the effect of storms:

People served by buried lines have dramatically fewer outages, according to two studies by the Edison Electric Institute, which represents investor-owned utility companies.The idea is good enough that many American cities put most lines underground years ago, and lines for most new subdivisions are buried. Overall, though, roughly 80% of lines in the USA still hang overhead.

Such “undergrounding” of power lines can be pricey. But the figure opponents commonly cite — 10 times as expensive as stringing lines overhead — is misleading. The actual cost can be half that, or less, depending on local conditions and whether lines are buried when developments are built or when roads are being torn up anyway.

The best idea is to identify the lines most likely to get knocked down and begin by burying those. A study for Pepco, the underperforming Washington-area utility, found that while burying all lines would cost $5.8 billion and add a ridiculous $107 a month to customer bills for 30 years, burying just the most vulnerable lines would cost about one-sixth as much and prevent 65% of outages, a more reasonable tradeoff.

Even with a reduced figure for burying the power lines now, this serves as a reminder that the best time to bury the power lines would have been years ago when the developments were first built. Doing so after the fact costs more money and mars a lot of property while the burying is taking place. Putting the money into burying the lines in the first place saves a lot of hassle down the road (hence, different rules for newer developments).

An added bonus: having fewer overhead lines looks better. Imagine pristine residential or commercial streets without power lines and poles all over the place.

Exploring the meanings of Chicago’s underground Pedway

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A Chicago artist and teacher has spent years exploring and analyzing Chicago’s large underground Pedway:

You want to know the best thing about the Chicago Pedway? It’s not that, despite this Polar Vortex winter, you can cover almost 40 city blocks on the Pedway without ever stepping foot outside. It’s not that the Pedway began modestly in 1951 and now stretches through the North Loop, jogs beneath Millennium Park and ventures as far east as the mouth of the Chicago River. It’s not that the Pedway could be regarded as a kind of yardstick of municipal progress, always seeming as though it might extend just a little bit longer someday. It’s not even that the Pedway’s generally mundane, charm-free hallways offer little to see — look, another “For Rent” sign! — and therefore it works perfectly as a daily treadmill for ambulatory meditation…

Where you see putty-colored corridors leading to a job in a cubicle farm, she sees dreams of the American frontier. You pass convenience stores selling gum; Tsen, 38, a native of Cambridge, Mass., passes through a long, winding metaphor for a Chicago never realized — “the by-product of projected futures,” she writes in “The Pedway of Today,” her new, perversely compelling guidebook/consideration of the Pedway’s cultural meanings.

Indeed, Tsen, a graduate of the School of the Art Institute of Chicago and photography/video teacher at Wilbur Wright College on the Northwest Side, has come to see the longtime walkway as her canvas. About four years ago, the Chicago artist — and former Wendella Boat tour guide, who says travel and The Path Not Taken have become the preoccupations of her art — began offering tours of the Pedway (she has since stopped). But she never charged her audiences, she said, because the tours would also quietly double as performance art, as free-associative strolling lectures in which your guide (Tsen) would dole out not dates or landmarks but thoughts on Jules Verne, revolving doors and how the Pedway is like Florence…

Eventually she stumbled across an entrance to the Pedway in the back of the Renaissance lobby, the path itself so low-key that you can see it every day without quite recognizing it. “The Pedway struck me not as the frontier that I had been looking for but a reminder of the glamour of early cities and a promise of future frontiers.” At this point in her guide Tsen asks readers to imagine that it’s 1893 and — though the Renaissance was built a century later — they are relaxing in the lobby before returning home from the World’s Fair, where they “attended Frederick Jackson Turner’s fabled lecture ‘The Significance of the Frontier in American History’ … still pondering his words: ‘The frontier has gone, and with its going has closed the first period of American History.”

Sounds like a very interesting and interpretive tour. All sorts of large infrastructure and urban projects would benefit from people who know them well enough and are enthusiastic about what they offer to share it with others.

If Chicago tried to advertise the Pedway more, would regular users complain that too many tourists are clogging the passages a la New Yorkers and the subway?

Still lighting fires on railroad tracks to keep the switches working

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Here is a brief look at using fire on the Long Island Railroad to keep the switches operational in the cold temperatures:

When the cold hits, isn’t the trains that have trouble. It’s the switches that direct the cars between tracks that freeze, and when a switch fails, it can compromise an entire line. To keep the switches functioning, the Long Island Railroad uses the centuries-old method of burning kerosene or natural gas to keep everything running.

The Long Island Railroad, the busiest commuter rail line in the United States, has dozens of switch heaters throughout its 700-mile system. Most use electric heating elements, other older ones burn natural gas, and the even older “switch pots” burn kerosene. Trackmen work through the nastiest of storms, lighting the heaters and dousing switches with Hexane, which is then ignited to melt the ice.

Yes, there are more civilized methods, like hot air blowers that clear debris, but in an era of self-driving cars and other modern marvels, simply using  fire to melt ice has a quaint retro feel to it.

While the picture is cool, I don’t know if “quaint retro” is the way to describe this. It is the 21st century, right? I’ve seen several stories about the use of fire this winter – including in the Chicago area with the maligned Metra tracks – but no one has mentioned how this is done in other countries. What about Siberia? Are there any technologies that could solve this issue?

“Without Lake Mead, there would be no Las Vegas”

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The 14 year drought in southern Nevada, northern Arizona, and southern California threatens Lake Mead and the water supply to Las Vegas and other communities. The ability to have such a city in the middle of a desert is quite remarkable. It rests on the construction of Hoover Dam:

HooverDamJul12

I’ve been there twice and I was impressed both times by the ability to put this all together in the 1930s. Yet, the dam is highly dependent on available water and weather patterns. Here is a look at the lower Lake Mead from the top of Hoover Dam in July 2012:

LakeMeadJul12

While this is partly a cautionary tale about the the limits of human consumption, it also presents an opportunity for human ingenuity. As the news report notes, “Las Vegas actually reuses 93% of its water.” Imagine if all cities in the world reached such levels. Thus, even with an extended drought, Las Vegas may continue to thrive:

BellagioFountainsJul12

The show must go on…

Examples of old infrastructure in America

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Popular Mechanics has some examples of “the oldest working infrastructure” in American cities:

Water System: Philadelphia Water Department. The City of Brotherly Love has one of the oldest water systems in the United States. While the pipe that broke two weeks ago was built in 1895, the average age of a Philly water line is 78 years, and the wastewater lines average 100 years old, according to the city’s water department. Eighty-seven percent of the more than 3000 miles of water mains are made of cast iron, which was the preferred building material until the 1960s. Drawing water from the Schuylkill and Delaware rivers, the system supplies 1.5 million Philadelphia residents. The mains are supposed to function properly for 100 to 120 years. The Philadelphia Water Department is still investigating what caused the most recent break…

Concrete Road: Court Avenue, Bellefontaine, Ohio. Using concrete as a road surface was unheard of in the late 1800s, until George Bartholomew pioneered its use by paving Court Ave. in Bellefontaine, Ohio. Bartholomew learned about cement production in Germany and San Antonio, then moved to Bellefontaine because of the neraby deposits of limestone and clay, the two main ingredients in cement. He had to fork over a $5000 bond to convince the city council to let him pave the square around the town’s courthouse, guaranteeing that the concrete would last at least five years. To preserve the historic avenue, Bellefontaine closed the street to traffic in the late 20th century but reopened it because of the traffic and parking problems the closure caused. Court Avenue is still open to light-vehicle traffic, but a statue of Bartholomew at the end of the street keeps trucks off the concrete…

Hydroelectric Power Plant: Mechanicville Hydroelectric Plant. The Mechanicville Power Station sits perched on the Hudson River about 20 miles east of Schenectady. It was built in 1897 to provide power to Schenectady’s burgeoning industry, and today is the oldest three-phase power plant still in operation in the United States. The system uses two three-phase, 40-cycle 32,000-volt circuits, and each of these operates at 6000 kw. These circuits are each capable of handling the station’s entire output, so that service is uninterrupted if one of them goes down. Each of the seven generators runs at 40 Hz and provides 750 kw.

Old infrastructure isn’t necessarily bad if it is well maintained and still meets modern needs. Why, those Romans built aqueducts that have lasted thousands of years – can’t some of our infrastructure do the same? Actually, this brings to mind the David Macaulay book Motel of the Mysteries where a future archeologist discovers a long-lost American hotel room and comes to some interesting interpretations. What exactly will survive from our society?

More on luxury basements under London properties

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The building of luxury basements under London properties continues:

A lack of room and strict planning laws dictate that the facade of many of London’s picturesque Victorian, Edwardian and Georgian-era neighborhoods must maintain their original character and outward appearance…

“The price per square foot (of basement extension) in areas we work in is probably £400 to £500 per square foot (between $660 and $830 per sq ft). The extra space this brings is probably worth double that,” he added…

“I think for any property with a value over £2 million ($3.2 million) a basement extension is certainly a consideration for the owners,” explained Rob Atkins of London estate agency, Domus Nova. “If you’ve lived in a house for 15 and 20 years and you cannot get a move for the right value then it is an option that can suit that growing family…

“Therefore I wouldn’t be surprised if you see that kind of basement living incorporated in houses for example in Paris, Rome, Vienna or Moscow in the future,” he added.

Without much regulation, it sounds like the incentives are generally there for wealthy owners to create these basements rather than move.

Many of these basements are being built in neighborhoods that are not the oldest in London. At the same time, I would be interested to hear about how such work could interfere with other underground services, whether that is sewers or the Underground or other properties.

Is there any place where this might work in the United States? It would likely have to be in a super-dense area where housing is in high demand. Perhaps Manhattan or San Francisco?

Chicago suburb of Long Grove wants to privatize almost half of its public roads

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Maintaining roads is expensive and the Chicago suburb of Long Grove has a potential solution: privatize a lot of its public roads.

Facing an annual funding gap of more than $1 million, Long Grove trustees have twice in recent months affirmed a plan that could privatize nearly half of the village’s public roads — transferring the cost of upkeep and plowing to the residents in the process…

Experts in public planning and municipal finance agree that Long Grove has hit upon an unusual potential solution to a commonplace problem. They say other communities also struggling to make ends meet could follow suit as aging roads deteriorate and revenue streams dry up. Yet such plans could eat away at the public’s trust in local leadership even as they mitigate public deficits, warned Joseph Schwieterman, a DePaul University transportation professor.

“It’s going to create resentment that city hall has broken its contract to fix the roads, and that could lead to turmoil that tears at the social capital of a community,” he said.

What has surprised some in and around well-to-do Long Grove is that the community — with its spacious home lots, ample green space and refined, rural character — finds itself in the situation at all. Recent census figures count it among the wealthiest villages in the Chicago area based on median income. Yet having more affluent residents doesn’t necessarily equate to a strong tax base, especially in towns that have little or no industry…

Local leaders first realized in the 1970s that to pay for maintaining roads without a property tax, something had to give, said Long Grove Village Manager David Lothspeich. After that, the board allowed public streets in new subdivisions only if they were main roads, and eventually entire subdivisions sprang up without a single public road, he said.

It sounds like a set of trade-offs: the community has a particular image and character involving big lots, nice homes, and no property taxes but to help maintain that character means limited commercial development. However, having less commercial or industrial development means fewer sources of property and sales taxes that can be used to maintain the community’s infrastructure. The money has to come from somewhere…

However the money is raised in the future for roads, it will be interesting to see how this affects the community’s character and image. Will people move away? Will it be as attractive?

Another suburb dealing with a similar issue is Winfield. The village has had difficulty paying for road maintenance and the debate in recent years has been whether to allow commercial development along the Roosevelt Road corridor that passes through the southern part of the community but it currently limited to larger lots.

Five case studies of major demolitions

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Building large objects is often a Herculean task. But what about the demolition of bridges, dams, aircraft carriers, supercomputers, and rocket hangers? Here is some of the points for tearing down the Bay Bridge between San Francisco and Oakland:

Control the Tension

The piers of the cantilever truss aren’t holding the bridge up. They’re holding it down. “This is like a highly strung bow,” says senior bridge engineer Brian Maroney. (A bow made of 50 million pounds of steel.) “You don’t want to just cut the bow because the thing will fly off in all directions.” So crews will first remove the pavement on the upper deck to lighten the bridge’s load and reduce the tension. Next they’ll isolate steel supports, jacking them out of tension until they can be cut without whipping apart. Then they’ll slowly release the jacks.

Cut the Truss Spans

Named for their length in feet, the 504 and 288 truss spans are not under as much tension as the cantilever, so there’s less chance they’ll explode in your face when you cut into them. Still, caution is called for: The 80-year-old steel is not like modern steel; crews must be prepared for differences in strength and hardness.

Cart the Pieces Away

The steel beams are coated with greenish-gray paint, under which is a coat of lead-based stuff. To avoid contaminating the bay, all that metal has to be trucked away and cleaned, after which it will be resold as scrap.

Build a Monument

The massive art-deco column of pier E1, near Yerba Buena Island, may be preserved as a monument to the bridge that served the Bay Area for 77 years. The E2 pier will also likely remain and be converted into an observation platform for the new span.

And then the piers still have to be demolished. Impressive operation all around. It would be interesting to see all of the costs and manpower associated with such demolitions.

Roads still susceptible to potholes

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A Google News search for the last week brings up hundreds of news stories about potholes. It is a familiar cycle: water gets on the roads, freezing temperatures cause the water to expand, potholes emerge on lots of roads. See diagrams and video about pothole formation here.

Is there any way to build roads that don’t have these problems? Here is one answer:

Which holds up better — concrete or asphalt? “Asphalt can sometimes be a more porous material than concrete depending on the depth of the asphalt surface. As a result, it can be more prone to a freeze-thaw cycle,” Shuftan said.

However, DuPage County Transportation Committee Chairman Don Puchalski said it’s all about maintenance. “The condition of the pavement keeps moisture from penetrating the riding surface,” Puchalski said.

Can’t we build pothole-proof roads? Engineering professor Imad Al-Qadi thinks we can do better. “Through better engineering of the materials and pavement systems, roads can withstand extreme temperatures and cycles of freezing and thawing,” Al-Qadi wrote in an email.

For asphalt, using proper binder and aggregate materials that aren’t susceptible to moisture, freezing or thawing can minimize damage.

For concrete, using the right chemical mixtures can control freezing and thawing. Proper spacing and using more steel in the concrete slabs can also control warping, Al-Qadi said.

This makes it sound like the best pothole solution might be more monitoring and money when roads are originally built. Who is going for pay for that? Surrey, England has gone with “pothole-proof” roads that have a 10 year guarantee:

But in an attempt to find a more permanent solution, the council has begun a five-year, £100 million plan to re-lay the county’s worst roads with new materials which carry a decade-long “no pothole” guarantee…

At the moment the council says it is carrying out a pothole repair every five minutes but the new roads, which have more flexible watertight surfaces, should overcome the problem…

About 300 miles of road will be repaired and the 10-year warranty means any potholes would be repaired by contractors Aggregate Industries and Marshalls.

So there might still be potholes but at least the road-builder will take care of it.

If the roads always have this problem, you could instead with a car that stands up better to potholes:

Honda cars are the most resilient to pothole damage, saving drivers hundreds of pounds in repairs each year, according to research by Potholes.co.uk.

The road maintenance campaign website analysed about 150,000 policies issued by Warranty Direct over three years to reveal the cars most and least susceptible to damage caused by the nation’s biggest bugbear – potholes…

After Honda, the most “pothole-proof” manufacturers are Toyota and Hyundai, with less than two per cent of their cars suffering axle and suspension damage attributable to potholes and other road defects.

Chrysler, Mercedes-Benz and Land Rover models are the most likely to suffer, with more than 10 per cent suffering damage each year.

Or you can just pay for some pothole-resistant tires.

All together, this is an annoying reminder that maintaining roads can be quite difficult. If they all have problems, it is very difficult to fix them quickly.

Discovering underground Roman aqueducts

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A group of amateurs have been tracing portions of Roman aqueducts hidden from view:

The group, which has been exploring underground Rome since 1996, has completed about 40% of its mission to map the aqueducts.”The famous arched, over-ground aqueducts we see today are just the tip of the iceberg; 95% of the network ran underground,” says Marco Placidi, head of the speleologists group, which is sharing its results with Italy’s culture ministry…

Dropping into the hole, Baldi disappears down the Anio Vetus aqueduct, a 3-foot-wide, 5-foot-high tunnel lined with pristine Roman brickwork. As frogs, spiders and grasshoppers scatter, Baldi reaches a maintenance shaft, complete with good-as-new footholds dug into the bricks that lead up to a narrow opening in the woods 10 feet above. Beyond him, the tunnel vanishes into the darkness…

“We have found Roman dams we didn’t know about, branch lines taking water to waterfalls built in private villas, and even aqueducts driven underneath” streams, Placidi said. “We are able to get up close and [feel we are] right back at the moment the slaves were digging.”

As the article notes, the level of construction here is quite amazing to survive roughly 2,000 years. But, without such underground aqueducts, the city of Rome may not have survived long.

What might happen to these infrastructure marvels? Perhaps they could be turned into tourist opportunities like the tunnels under Paris.