Archive for the ‘Sewer System Rehab’ Category

It’s time to face the nation’s water infrastructure needs

Thursday, May 17th, 2012

Communities across the country are being confronted with a daunting challenge: replacing the aging, underground pipes that carry drinking water while also expanding service to meet the needs of a growing population.

Replacing the nation's aging waterlines is expected to cost $1 trillion over the next 25 years.

Making the task even more formidable is the price tag, which is predicted to be at least $1 trillion over the next 25 years.

During a February hearing by the House Subcommittee on Water Resources and Environment, LCA’s general manager and chief financial officer, Aurel Arndt, drove the point home: “I want to emphasize that this is $1 trillion for buried drinking water assets only. Above-ground drinking water facilities, wastewater, stormwater, and other water-related investment needs are also very large, and must be added to reflect the true magnitude of the water investment needs before us.”

To put that number — a one followed by 12 zeroes — into some perspective, imagine this: According to CNBC.com, $1 trillion, if counted out in $100 bills, “would be enough to fill 4.5 Olympic-sized swimming pools.” That’s a lot of bills.

Meanwhile, investment is lagging far behind, and finding funding for the work is becoming progressively difficult. At the same February hearing — held to discuss financing options — committee chairman U.S. Rep. Bob Gibbs, R-OH, said, “Local governments are being forced to pay for more and more of the costs … with the result that local communities and ratepayers are increasingly getting economically tapped out.”

Flooded with problems

It might be hard to believe that the nation’s water lines are in such dire straits. After all, water is a basic human need. But the facts don’t lie: Water infrastructure systems in major cities across the country have been experiencing phenomenal failures. For instance, as of 2003, Atlanta was losing 20 percent of its water because of leaks in old mains. Monitoring of leaks by New York’s DEP, started in the 1980s, found that a section of New York City’s 85-mile long Delaware Aqueduct was losing up to 36 million gallons of water a day. And in Pittsburgh, a 2008 report to the state DEP showed leaks accounted for a loss of about 42 million gallons of water a day. According to the Environmental Protection Agency’s Aging Water Infrastructure Research Program, there are 240,000 water main breaks each year in the United States. The problem is so bad that in a 2009 assessment, the American Society of Civil Engineers gave the nation’s water systems a “D- ” in its “Report Card for America’s Infrastructure.”

At the heart of the problem is the age of the infrastructure: Many cities are using water mains put in place more than 50 years ago; in fact, some older communities have pipes that have been buried more than a century. Because the pipes were largely made of steel or iron, they’ve stood up well over the years; many lasting longer than anyone thought they would. But that just means they exist on borrowed time. And unlike our bridges and roads, which seem to get most of the attention, it’s much harder to see deteriorating water lines.

“A large part of the water infrastructure is out of sight and out of mind,” Arndt says. “It’s buried underground. Whenever something is invisible to the public, it’s either taken for granted or, in many cases, just forgotten until a problem arises. With assets having such a long life, you can go through several generations without having any kind of significant expenditure associated with those facilities … that almost creates the impression that the assets are immortal, when in fact they do have a limited life. [So] for the first time in four or five generations, the communities are being faced with making significant investments in that capital.”

LCA customers are among the lucky ones. “In many ways we are fortunate because LCA was first created in the 1960s, so everything that was built since then is, by waterworks comparison, relatively new,” Arndt says. “In LCA’s case, if you look at the oldest mains that we have constructed, we are probably facing that replacement time probably somewhere beyond 2050.”

Conversely, the Philadelphia Water Department says the average age of its 3,200 miles of water lines is about 78 years; with some pipes dating back to 1824. The average age of their wastewater lines is about 100 years.

Similarly, infrastructure needs and age vary across the country. Arndt says that in the South and West, investment demand has revolved more around new construction in growing areas, rather than on replacement. “A large part of their existing infrastructure was built around World War II and thereafter, so they aren’t really approaching the same replacement urgency that, for example, the Northeast and Midwest are experiencing.”

Wastewater woes

In many communities, stormwater lines and wastewater lines are connected. Wet weather often causes overflows that wash raw sewage into waterways.

But there’s also wastewater to consider. While most wastewater systems are newer than the drinking water systems (“A lot of investment occurred in the 1970s when the Clean Water Act was enacted,” Arndt says), there’s still a tremendous amount of work that needs to be done to bring the lines and treatment systems up to date.

One of the biggest problems is with stormwater. “The issues we find that are driving wastewater infrastructure investment,” Arndt says, “is what is called combined sewer overflows, in which the very old systems, the ones built in the first half of the last century, actually combine the stormwater and sanitary sewer systems.” When there’s enough rain (or snowmelt) to trigger what’s called “peak flow,” the polluted flow washes into rivers, lakes, streams and bays; backs up into homes, and even bursts out of manhole covers.

A 2011 story from the Huffington Post says that each year, “more than 27 billion gallons of untreated sewage and polluted wastewater spill into New York Harbor.” The trigger for these overflows can be “as little as one-tenth of an inch of rain.”

The 3 Rivers Wet Weather Demonstration Program reports that in the Pittsburgh area, “As little as one-tenth of an inch of rain — an average Pittsburgh rainfall is one-quarter inch — can cause raw sewage to overflow into our rivers and streams. Melting snow can cause the same effect.” The group says that since 1995, river advisories issued by the Allegheny County Health Department because of these overflows have been in effect for nearly half of each recreational boating season, which runs from May 15 to September 30.

Arndt says that efforts are under way nationwide to separate those combined wastewater lines, as well as upgrade sewage treatment systems to remove so called “nutrients” such as nitrogen and phosphorous, which cause a host of problems for waterways.

All these needed improvements, however, bring us back to the $1 trillion-plus figure (and remember, that figure doesn’t factor in wastewater work), because the biggest hurdle for most communities is the cost.

Usually, local governments provide the majority of the financing for water and sewer projects. This capital could come in the form of customer fees, loans or bonds. States provide aid through loans and debt refinancing; money from the federal government helps to fund those programs.

But the expected cost of infrastructure replacement is so high, experts fear the traditional approach won’t be enough to make ends meet. “Increased investment needs to take place, which leads to the question: Where is the money going to come from?” said Rep. Gibbs at that February meeting.

The WIFIA connection

That’s where WIFIA — the Water Infrastructure Finance and Innovation Act — would come in. The proposed legislation would create a Water Infrastructure Finance and Innovation Authority, which, Arndt testified, would “provide direct loans, loan guarantees, and lines of credit for large water infrastructure projects.” The proposed authority would provide municipalities with “a wider range of funding options, including lower interest rates and more flexible terms.”

“The scale of water infrastructure investment needs … often push utilities beyond the limits of … traditional financing sources and beyond the ability to set affordable rates for its customer base,” Arndt testified. “That calls for an expanded toolbox of funding options to help meet the nation’s critical water infrastructure needs.”

“Buried No Longer: Confronting America’s Water Infrastructure Challenge,” a report by the American Water Works Association, says that one of those funding options needs to be higher water bills for customers. Arndt is chairman of the advisory work group that helped prepare the report.

“The level of investment required to replace worn-out pipes and maintain current levels of water service in the most affected communities could in some cases triple household water bills.” That projection, the report goes on to say, “assumes the costs are spread evenly across the population in a ‘pay-as-you-go’ approach.”

LCA General Manager Aurel Arndt says the Authority's oldest mains probably won't need to be replaced until "somewhere beyond 2050.”

Because of the relatively young age of LCA’s infrastructure, the Authority has the ability to set money aside rather than adopt a “pay-as-you-go” model. That means rate increases should continue to be minimal. “We don’t see a significant impact to our rates from replacement costs,” says Arndt. “One of the things we’re doing since we have the luxury of time is to bank funds and put them in reserve, so we have at least some of the money necessary when that time comes.”

That doesn’t mean water bills won’t go up. “We have been raising rates the last few years, but by a very modest degree — they’ve been like 3 to 4 percent a year — to cover the increasing operating expenses,” Arndt says. “I think that pattern is what we would like to see: relatively modest, but more regular increases in rates, rather than having very large, double-digit increases on a less frequent basis.”

As with any infrastructure, occasional repairs and improvement must be made, says Liesel Adam, LCA’s customer care and communications manager. “For the time being, our capital improvement plan has been successful in keeping our water system in relatively good repair on a proactive basis, and we have the capacity from a supply perspective to meet the needs of new growth for the foreseeable future.”

However, she says sewer system improvements and expansion are high on the Authority’s list of priorities. Development projects in the ever-growing Lehigh Valley area mean LCA’s sewer system will be “stretched beyond its current capacity without new infrastructure,” she says. “And the existing sewer system is experiencing deterioration that allows rainwater to infiltrate into the pipes, which can increase chances of sewer system overflows during wet weather events.”

At the time of this story’s publication, the fate of the Water Infrastructure Financing and Innovation Act was still in limbo. Greg Kail, Director of Communications for the American Water Works Association, says AWWA expects a bill to be introduced sometime in May. “There will then be a ‘markup’ hearing in which they [the House Subcommittee on Water Resources and Environment] consider amendments,” he says. “Members will then vote on whether to pass the bill on to the full Transportation and Infrastructure Committee. There is always a chance the full committee will initiate markup, but that is rare.”

In the meantime, the nation’s water infrastructure needs are growing faster than the funding needed to meet them. And if action isn’t taken soon, cash-strapped municipalities all over the country could find themselves high and dry.

 

 

Making sure rain doesn’t turn into a pain

Monday, April 25th, 2011

April showers might bring May flowers, but they can also bring homeowners big headaches: flooded basements, damaged HVAC and electrical equipment, and problems with mold.

Fortunately, there are some steps you can take to eliminate or reduce the risk of water damage to your home.

Examine basement walls for cracks or obvious signs of leaks. There are a number of compounds on the market that can be used to seal smaller cracks, including cement/rubber blends, paints, and epoxies. Larger cracks should be examined and repaired by a licensed contractor, as they could signal a weakness in the home’s structural integrity.

Ensure that gutters and downspouts are clean, and that the spouting directs water away from the base of the house so that it won’t pool around the foundation. Clogs can send gushers of rainwater down the side of your home, where it can seep into walls and windows, wash away the ground around the foundation, and find its way into the basement.

Make sure the ground around the foundation slopes away from your house. If not, water can collect around the base of your home and find a way in.

Ensure that all HVAC equipment in the basement is elevated, or has a floodwall constructed around it. Any electrical components, such as fuse boxes, circuit breakers or outlets, should be raised at least a foot above the basement floor.

Know where you live: Are you in a flood zone? Could that little stream in your backyard turn into a raging torrent after a downpour? Does your lawn practically turn into a swamp every time it rains? You might want to consider installing sump pumps and/or having the entire basement waterproofed. And be sure to check that your insurance policy covers flood damage.

Check to see that any fuel tanks, such as those used to store heating oil, are anchored. Floodwaters can easily carry away or tip fuel tanks, making cleanup more difficult – and more hazardous – while also polluting groundwater systems.

Finally, remember that before doing any work, you should check with your local municipality regarding building codes and permits. And if you’re going to be doing any digging, contact Pennsylvania’s One Call system by dialing 811 first to find out what’s underground.

Storm Report: Sewer overflows & cleanup efforts

Wednesday, October 6th, 2010

Last week, the Lehigh Valley received record rainfall in the amount of more than 8 inches beginning on Thursday, September 30, and continuing overnight into Friday, October 1, 2010.

 For Lehigh County Authority (LCA) and the municipalities that are connected to its regional sewer system, the storm brings the issue of leaking sewer lines into sharp focus. During the storm, sewer flows increased rapidly over a few short hours from a normal flow of about 7 million gallons per day to approximately 20 million gallons per day on Friday.

LCA now has three facilities in place to address “wet weather flow” like this, including a pump station in the Spring Creek Road area of Lower Macungie Township, a pump station in Allentown’s Lehigh Parkway area, and a new flow equalization basin (FEB) in Fogelsville. The FEB project was just completed and put into full operation earlier in the week, so this storm event was its first use. While LCA plans to analyze the FEB’s operation during last week’s storm to learn how to optimize its use during wet weather events, officials say the basin was successful in holding back up to 3 million gallons of flow during the peak of the rain event, which may have helped to reduce overflows downstream of the facility.

All three facilities were working at full capacity to handle the high flows brought on by the storm. However, the quick onslaught of the storm overwhelmed the system in a few areas, causing sewer manholes to overflow in the Lehigh Parkway area, just upstream of the pump station located there. Four of LCA’s sewer manholes were overflowing in addition to other non-LCA sewer manholes that were observed overflowing during the storm event. Because the municipal, LCA and Allentown pipe networks are an interconnected system, overflows may have been experienced in other locations throughout the system as well, in addition to possible bypassing of the Allentown treatment plant.

Based on operational data and field observations, LCA believes the overflows began at about 3:30 a.m. on Friday and continued intermittently until about 2:30 p.m. On Friday afternoon, LCA crews spent time in the Little Lehigh Parkway raking up debris caused by the Little Lehigh Creek flooding and the sewer manhole overflows, and spreading lime to neutralize the affected areas and control odors at any of manholes that showed evidence of overflows. Crews will continue to work on the affected manholes to repair damage caused by the force of water flowing through the system.

LCA crews also spent Friday afternoon and Saturday inspecting manholes on the Western Lehigh Interceptor upstream of the City’s Little Lehigh Parkway. No evidence of sewer overflows was observed upstream of the area that was inundated on Friday.

Sewer overflows occur in this region during storm events due to a high rate of rainwater entering the sewer system, typically through a combination of unauthorized connections such as sump pumps, roof drains and floor drains, manholes that are not designed to prevent rainwater leakage into the system, leaking private lateral sewer lines, public sewer lines that allow groundwater to enter the system, and aging stormwater systems that do not adequately contain stormwater runoff. Sanitary sewer systems are not designed to handle stormwater, and yet the flows experienced during rain events indicate that rainwater inflow is the primary cause of these peak flows and subsequent overflows.

In late 2009, the U.S. Environmental Protection Agency issued an order for all the municipalities using the regional sewer system that flows to the City of Allentown treatment plant to eliminate sewer system overflows that have plagued the system for quite some time. Municipalities throughout the region have their own sewer systems providing service to residents and businesses, and connect into LCA’s or Allentown’s regional interceptors to transport their wastewater to the treatment plant.

LCA and the municipalities in Western Lehigh County are actively pursuing the investigation and rehabilitation of sewer systems to eliminate such overflows. The Sewer Capacity Assurance and Rehabilitation Plan (SCARP) was adopted by LCA and the municipalities it serves in 2009, and they are now working through a partnership approach on programs to address high-priority areas identified through the flow-monitoring work conducted over the past three years.

Municipalities included in this partnership have already begun work in their communities to identify homes with unauthorized connections or sewer lines and manholes that need to be prepared. LCA has recently completed the construction of the FEB to help contain peak flows during storm events, as well as pursuing a flow modeling program, interceptor rehabilitation work, and providing overall leadership and support for the municipalities involved in the partnership. It is expected that this work will continue for several years before significant improvements will be realized, as the problem stems from tens of thousands of individual sewer connections that must be inspected and addressed if they are contributing rainwater to the system.

Media highlights sewer overflows

Wednesday, July 28th, 2010

In the July 25, 2010 edition of The Morning call, a lengthy article discussed the important issue of sewer system overflows into the Little Lehigh Creek. If you read the article, you may be left wondering what all this means. Is it safe for my family to swim or go fishing in the creek? Is my drinking water safe? What about the environmental impact? These are questions that trigger and emotional response of sadness and fear, as we all have a natural connection to our precious water resources.

A few important clarifications are required to help put the media’s coverage of this issue into perspective.

First, it is important to note that the article was focused primarily on incidents when the City of Allentown’s wastewater treatment plant was bypassed, resulting in 33 million gallons of raw sewage being discharged into the Little Lehigh Creek over a 10-year period. The article did not clearly explain that the location of this bypass is at the Kline’s Island Treatment Plant in Allentown, just upstream of the creek’s confluence with the Lehigh River. The photos in the newspaper show residents in the creek upstream of this location, which would not have been affected by these bypass incidents.

However, other incidents have occurred over the years where sewer manholes have overflowed upstream of KITP, including sewer overflows within LCA’s service area. Like the KITP bypasses, these have been isolated incidents that are well documented  and reported (i.e. not a secret), occurring exclusively during extreme wet-weather conditions that cause the sewer systems to become overwhelmed with the inflow of rainwater. Immediately following the subsidence of floodwaters that result from these rain events, our systems return to normal operations, which is to say that there is no lasting effect on our sewer systems, nor any continuous or ongoing discharge of raw sewage to the creek.

For example, most of LCA’s municipal signatories are served by our Western Lehigh Interceptor facilities. According to LCA records, the most recent incident involving sewage overflows along the Western Lehigh Interceptor occurred in October 2005, when Tropical Storm Tammy dumped approximately 10 inches of rain on our region within a 2-day period. The severe flash-flooding that occurred during this storm resulted in many areas of the Little Lehigh Creek, and our parallel sewer lines and associated manholes, to go “under water.” In effect, the creek banks were so severely flooded during this tropical storm that our manholes were overwhelmed with creek water and rain water, resulting in some mixing of highly diluted sewage into the floodwaters. And as soon as the floodwaters receded, the overflows also ceased.

LCA conducted follow-up inspections over the next several days, finding no lasting effects on our sewer system facilities, the surrounding rights of way, or the creek. These inspections, and all the subsequent inspection and rehabilitation work LCA has completed since this time, help us to verify that there is no ongoing flow of raw sewage into the environment at this location.

Another area of concern is in the Little Lehigh Parkway, where LCA and other municipalites have facilities that come together to join with Allentown’s system. Here again, overflows have been experienced in some isolated cases when extreme wet weather has caused region-wide flooding, resulting in excessive rainwater inflow into our sewer systems. Keep in mind that these sewer systems are not designed to handle “storm water.” The rainwater enters the sewer system typically through a combination of high groundwater levels and the flow of clear water from unauthorized connections such as sump pumps, floor drains and improperly maintained manholes.

What’s next? Communities in Western Lehigh County are actively pursuing the investigation and rehabilitation of sewer systems to eliminate such overflows. The Sewer Capacity Assurance and Rehabilitiation Plan (SCARP) was adopted by LCA and the municipalities we serve in 2009, and we are now working on plans and programs to address high-priority areas identified through the flow-monitoring work conducted over the past three years. Of particular note is the issue of removing rainwater inflow from unauthorized connections such as sump pumps and floor drains. This is one of the major contributors of rainwater into the system that causes the overflows discussed by The Morning Call. The community must work together to determine the best way to identify and eliminate such sources of rainwater from the system if eliminating the overflows is truly a goal the community embraces.

Food for Thought: The sole purpose of public sewer systems is to protect our environment through proper treatment of waste. While we certainly would like to eliminate all sewer system overflows, and we are working collectively as a region toward that goal, we believe the overflow incidents that have occurred to date pose far less risk to environmental health and safety than the situation that would exist if we had no centralized sewer collection and treatment system in place. Take a look at other areas of the world (and even some areas in the Lehigh Valley!) where leaking septic systems have caused tremendous environmental damage and pose great risks to human health. It was not too long ago (40 years or so) that the Lehigh Valley region looked at this issue and realized the need to regionalize sewer service in order to protect local waterways. The investment has been costly and will continue to challenge our communities as repairs are needed, but the overall improvement in local utility services and environmental protection cannot be underestimated.

Read the full article from The Morning Call.

What are we doing to battle sewer system overflows?

Tuesday, June 29th, 2010

In late 2009, the U.S. Environmental Protection Agency issued an order for all the municipalities using the regional sewer system in central Lehigh County to eliminate sewer system overflows that have plagued our system for quite some time. Municipalities throughout the region have sewer systems providing service to residents and businesses. These sewer systems are connected to LCA’s regional pipeline that transports waste to the City of Allentown for final treatment. Click here for a system overview map.

How do the overflows happen? The primary issue we are all faced with is rainwater infiltrating the sewer system during wet-weather events. This occurs when sewer lines are cracked and need to be repaired, when customers have gutter systems and sump pumps connected to the sewer system, when manholes are not sealed properly, etc. Removing the rainwater from the system will be a long and expensive process requiring a partnership of all municipalities and customers.

Municipalities in Western Lehigh County have formed a partnership to work on solutions to this problem under a program called Sewer Capacity Assurance and Rehabilitation Program (SCARP). Municipalities adopted the SCARP plan into the Act 537 plans in January 2010, and we are all working together on the next steps, which is an evaluation of flow monitoring data to determine the priority areas that need to be looked at closely, and determining the most meaningful ways to reduce rainwater infiltration.

SCARP fact sheet

Full SCARP document

Appendix A

Appendix B