WSSC Digs Deep In Tricky Bethesda Pipe Project
The Washington Suburban Sanitary Commission recently completed a tricky mining procedure for a bi-county water main that will run under Bethesda.
On April 24, WSSC “holed through” the wall of a shaft 200 feet below a spot near Tuckerman Lane and I-270. A Tunnel Boring Machine drilled a 4.5-mile section of what will be a tunnel for a 84-inch diameter water main that will be able to hold up to 100 million gallons of water a day.
WSSC said its Tunnel Boring Machine (TBM) hit its target under Tuckerman Lane a few feet off from dead center.
It was the last leg of the 5.3-mile tunnel and the final step in the mining portion of the Bi-County Water Tunnel Project. The Bi-County Water Tunnel will run along I-270 and I-495, connecting two existing 96-inch water mains and helping to keep up with increasing water demands in both Montgomery and Prince George’s Counties.
A press release on the project said the new main will also increase reserves in case of emergency. It will be completed in 2014.
The scheduled shutdown of several large water mains at the time of the Chevy Chase Lake Drive water main break in March, including a 96-inch main from WSSC’s Potomac filtration plant to Tuckerman Lane, drew scrutiny from Montgomery County leaders.
The break, combined with the shutdowns combined forced WSSC to issue mandatory water use restrictions.
Video via WSSC
Chevy Chase Lake Drive Reopens After Water Main Break
One of the last remaining signs of last month’s major water main break in Chevy Chase has been repaired, as Chevy Chase Lake Drive has been reopened.
The March 18 break of the main transmission line sent water shooting 30 feet high at the corner of Connecticut Avenue and Chevy Chase Lake Drive, causing a downed power line, downed trees and torn up asphalt along the two-lane road.
WSSC had Connecticut Avenue fully reopened by the end of that week and mandatory water restrictions were called off by that weekend. But the repairs of Chevy Chase Lake Drive left some headaches for residents of HOC housing, workers at the 8401 Connecticut Avenue office building and customers of businesses there.
The Chevy Chase Land Company which owns the 8401 Connecticut building and has its headquarters there, asked tenants to park in the parking lot behind the nearby shopping center. Customers and visitors were allowed to park for free at the surface lot at 8401.
That road has been completely repaved with new yellow lane markings. The reconstruction of the sidewalk on the south side of the road is complete.
WSSC spokesperson I.J. Hudson said some tree planting and stream bank restoration work remains. WSSC is responsible for repairing roads, trees and sidewalks damaged by water main breaks.
Some photos via WSSC
WSSC Says Monitoring System Didn’t Fail In Chevy Chase Water Main Break
WSSC officials today said they still don’t know what caused the major water main break on Connecticut Avenue last month, but that the fiber optic monitoring system meant to warn of breaks did not fail.
WSSC chief engineer Gary Gumm told the Montgomery County Council’s Transportation & Environment Committee that the acoustic fiber optic (AFO) monitoring system did not warn of the break because it only detects pings or snapping sounds of steel wires that support the system’s major water PCCP mains. Because the steel wires at the Connecticut Avenue break did not snap before the break, WSSC had no notice of what was coming.
“That is a distinction however that has very little comfort to our community because the purpose of the AFO system is to give us warning,” said Councilmember Roger Berliner (D-Bethesda-Potomac) who organized today’s hearing the day after the break. “That’s a source of great anxiety for our community.”
A resident did report a leak near the 60-inch main at 1 p.m., about seven hours before the March 18 break, which led to a geyser of water near the intersection of Connecticut Avenue and Chevy Chase Lake Drive in Chevy Chase. The damage left downed power lines, a torn-up lane of Chevy Chase Lake Drive, traffic problems on Connecticut Avenue and a mandatory water use restriction for the county.
Gumm said the crew that responded to the leak acted appropriately, determining it came from a valve that could be repaired the next morning.
The full forensic report is expected in June.
“We did not know that this type of pipe might fail without the wires breaking first,” Gumm said. “Water was seen bubbling out of a valve on Connecticut Avenue. In hindsight, a mistake was made there. …What I think we learned with this one is I think they did everything that they’re supposed to do. When these valves are in the vicinity of some of these larger pipes, again I think we need to take a little more time, put a little more effort to try and make sure we’ve isolated it to the valve and not to the PCCP line.”
Gumm indicated that the atypical shape of the pipe at the point where it broke might have had something to do with the break, which WSSC has categorized as a catastrophic failure. Gumm said 11 other large mains have been repaired or replaced since 2011 because the AFO system detected snapped wires. One other repair is scheduled to begin in May.
When pressed for more details on how atypical the pipe was, Gumm said only about three percent of WSSC’s large PCCP water mains are similar.
Berliner and Councilmember Hans Riemer (D-At large) also questioned WSSC general manager Jerry Johnson and Gumm about the agency’s inspection and repair schedule. The scheduled shutdown of several large water mains at the time of the March water main break, including a 96-inch main from WSSC’s Potomac filtration plant to Tuckerman Lane, ultimately led to the mandatory water restrictions. The 96-inch main has been closed since the fall.
“Perhaps we have learned in this exercise that we could have done a little better. Instead of waiting for the entirety of the report or recommendations for repairs, our contractor vehicles do allow us as we know things to get started on them,” Gumm said. “We could probably shave some time off the repair process by doing that.”
Berliner asked Johnson for a comparison of WSSC’s performance to systems in other jurisdictions. He also discussed WSSC’s request for 80-foot setbacks for all buildings near major water mains such as the one that broke in Chevy Chase and repaving work from WSSC contractors after standard neighborhood water main repairs.
The full report WSSC officials gave the Committee today will be published on Montgomery County’s website.
Photo via WSSC
Morning Notes
Local politicians mum on whether the Redskins should lose their trademark protection — A bill proposed in Congress would strip the Washington Redskins and any other entity of trademark protection for the term “Redskins,” but no area politician, including Rep. Chris Van Hollen (D), seemed willing to take a position on the matter. There is also an ongoing case at the federal Trademark Trial and Appeal Board. [Washington Post]
Planning White Flint’s Civic Green — Friends of White Flint and Just Up The Pike blogger Dan Reed looks at what features would work for a planned civic green south of Old Georgetown Road between Rockville Pike and Executive Boulevard, what planners hope can one day be a focal point and central gathering space of the new White Flint. [Friends of White Flint]
Brickyard Road Site Could Be Home To New Potomac Elementary — After Montgomery County decided against its controversial plan to uproot a local organic farm and build soccer fields at the Brickyard site, MCPS has now told parents the site could be home to a new Potomac Elementary School to quell overcrowding. [Washington Examiner]
Chevy Chase Water Main Break Hearing Today — The County Council’s Transportation & Environment Committee, led by Councilmember Roger Berliner (D-Bethesda-Potomac) will hear from WSSC officials about last month’s 60-inch water main break in Chevy Chase Lake. The hearing is set for 9:30 a.m. in Rockville and can be viewed online at www.montgomerycountymd.gov. [Montgomery County Council]
Flickr photo by streetamatic
UPDATED: WSSC Leak In Wooded Area of Chevy Chase
UPDATE 3:30 WSSC crews have found a leak in a water main that may be contributing to standing water in a wooded area off Jones Mill Road in Chevy Chase.
It’s unclear how much of the water is from the leak or from melting snow, but this afternoon WSSC said there appears to be a leak in the 54-inch water main near 3217 Coquelin Terrace.
A press release this afternoon said the leak was at first thought to be in a relief valve, but WSSC crews have confirmed the leak was in the transmission main itself. There is no need for mandatory water restrictions, according to the release.
The main is connected to the 60-inch line that broke last Monday at Chevy Chase Lake Drive and Connecticut Avenue, but WSSC spokesman I.J. Hudson said it’s too early to know if the leak is in any way connected to last week’s event. The leak occurred 1.2 miles east of the Connecticut Avenue break, Hudson said.
No customers are without water service and no roads or traffic patterns have been affected by the leak. WSSC crews are using Jones Mill Road Neighborhood Park as an access point to the woods.
WSSC says a resident reported seeing water on the ground in the wooded area near the 3200 block of Coquelin Terrace on Monday.
The press release this afternoon said the main does have the acoustic fiber optic monitoring system that did not warn the WSSC in time to prevent last Monday’s main break. But the monitoring system is designed to detect the snapping of steel wires embedded in the pipe and not leaks.
WSSC Hearing Scheduled For April 8
WSSC officials will answer questions about last week’s major water main break in Chevy Chase at a Montgomery County Council Committee hearing on April 8.
Councilmember Roger Berliner (D-Bethesda-Potomac) announced the date and 9:30 a.m. start time for the session today on his Twitter account.
Last week, after the 60-inch transmission main broke and sent water shooting about 30-feet into the air at the intersection of Chevy Chase Lake Drive and Connecticut Avenue, Berliner said WSSC general manager Jerry N. Johnson agreed to appear before his Transportation & Environment Committee to answer questions about the what caused the break and if it could have been prevented.
Berliner said he would ask Johnson why a fiber optic cable monitoring system failed to warn WSSC in enough time before the break. In the time since Berliner’s announcement, reports surfaced that a Chevy Chase resident saw and reported water spouting from the road about seven hours before the break, which occurred on Monday at about 7:45 p.m. A WSSC crew determined the water came from a leaky valve and that repair on it could be put off until the next morning.
WSSC has said it will take weeks before a forensic investigation determines the cause of the break.
The break caused significant damage to Chevy Chase Lake Drive and the creek bed just west of the intersection. Both sides of Connecticut Avenue were closed into last Tuesday morning and all three lanes of northbound Connecticut Avenue weren’t re-opened until late last week.
WSSC also imposed mandatory water restrictions in its entire Montgomery and Prince George’s service area to ensure enough water for fire fighters and hospitals.
Berliner said he will ask why a nearby 96-inch water main remains out of service. He claimed mandatory water restrictions were necessary because of the combination of the closure and the Chevy Chase water main break.
WSSC: Repairs On Chevy Chase Water Main Almost Done
WSSC says repairs to the 60-inch water main that burst Monday night in Chevy Chase are almost complete and that mandatory water restrictions could be lifted this weekend.
The pipe broke on Monday at about 7:45 p.m., sending water shooting about 30 feet into the air near at the intersection of Chevy Chase Lake Drive and Connecticut Avenue. The break tore through some of the pavement on Chevy Chase Lake Drive and caused erosion in the nearby stream bank that led to a downed tree and downed power line.
Connecticut Avenue was closed in both directions from Monday night until all three southbound lanes were opened on Tuesday morning. Two lanes of northbound Connecticut Avenue, where the repair work was going on, were open yesterday.
WSSC this morning said some main aspects of the repair were completed yesterday, including grouting of the joints and re-installation of the Acoustic Fiber Optic monitoring system, the same system that will be under scrutiny for not providing an earlier warning of the pipe break when taken up at a future County Council Committee hearing.
A warning from a Chevy Chase resident of water leaking through the road about seven hours before the break will also draw attention. The Washington Post reported the story today.
WSSC reports that crews will flush out the repaired line today, part of the decontamination process before putting the transmission main back into service.
Once it is back in service, WSSC will lift mandatory water restrictions.
Photo via WSSC
Chevy Chase Water Main Break Bigger Than First Reported
UPDATE 5:35 p.m. County Councilman Roger Berliner (D-Bethesda-Potomac) says he will schedule a meeting of his Transportation & Environment Committee as soon as possible to delve into what went wrong with the Chevy Chase Lake Drive water main break.
He called the break “very troubling,” and said WSSC general manager Jerry N. Johnson indicated he would answer questions at the meeting.
Berliner spoke with Johnson after penning a letter in which he asked for details on the pipe, the last time it was inspected and if acoustic fiber optic monitoring Montgomery helped pay for was ineffective in providing an early warning about the break.
In our conversation, I asked him directly whether the state of the art equipment that was intended to monitor this type of pipe — pipe made of PCCP, which was the type of pipe that burst on River Road several years ago, had been installed on this watermain. Mr. Johnson replied in the affirmative. That response of course raises a host of other questions — including whether the equipment installed was defective or whether WSSC failed to monitor it adequately. They need to have answers, and Mr. Johnson appreciates the urgency of being able to share with our community their assessment of what went wrong. I am scheduling a T&E Committee as soon as possible to provide a forum in which these questions and others can be aired and answered.
Berliner also said the mandatory water restrictions that are still in effect because of the break bring up another issue:
These restrictions are themselves a consequence of another issue that needs to be addressed — there has been a 96 inch main out of service since November. It is the combination of that 96 inch main being down plus this latest break that necessitates the water restrictions. Why the 96 inch main has been out of service this long is very troubling in and of itself and a matter that we will certainly explore with WSSC at the hearing.
ORIGINAL As northbound Connecticut Avenue rush hour traffic crawls by, WSSC officials now say the water main break at Chevy Chase Lake Drive that has caused a significant disruption since last night was larger than first reported.
The transmission line that broke, causing an estimated 60 million gallons of water to gush about 30 feet in the air and spill into the stream below, was actually a 60-inch pipe, not a 54-inch pipe.
Pepco and Washington Gas officials had to secure power and natural gas lines near the break. Montgomery County Police were able to reopen all three southbound lanes of Connecticut Avenue at 7 a.m., but all three northbound lanes remained closed until one was reopened this afternoon.
Part of the clean-up process included dealing with an electric utility pole that fell overnight when a tree, in the rapidly eroding creek bed, fell over.
Power outages resulted from the downed wires. Power was restored throughout the morning. WSSC said no customers were without water service as of this morning.
Photos from WSSC via Facebook
Berliner Asks WSSC For Explanation Of Chevy Chase Water Main Break
County Councilman Roger Berliner (D-Bethesda-Potomac) this morning released a letter to WSSC general manager Jerry N. Johnson asking about the status of the 54-inch water main break in Chevy Chase that left downed trees, snarled Connecticut Avenue traffic and mandatory water restrictions in place for Montgomery and Prince George’s Counties.
The break happened at Chevy Chase Lake Drive and Connecticut Avenue.
WSSC said in a press release this morning that no customers were without water.
Southbound Connecticut Avenue reopened at 7 a.m. this morning, but northbound Connecticut Avenue remains closed between East-West Highway and Jones Bridge Road and traffic remains difficult through the area.
The road closure has led to the closure of the Chevy Chase Library and access to the 8401 Connecticut Avenue office building remains closed off.
WSSC said the pipe that broke began operation around 1980.
Dear Mr. Johnson:
I am writing with regard to the 54 inch water main break that occurred last night (March 18) which has snarled rush hour traffic, led to mandatory water restrictions in Montgomery County, and led to some power outages in the vicinity of the break. I know WSSC is doing everything it can to perform emergency repairs and get the water main back on-line.
Please let me know how many (if any) customers in the area are currently without water (and if so, if WSSC is delivering water to those households), if any vulnerable populations are without water or power at this time, whether there were any injuries resulting from the break, and whether any additional interagency cooperation is needed (with the County, Pepco, or others).
I am also interested in what the status of this section of PCCP pipe is with regard to WSSC’s ongoing large diameter main inspection/repair/acoustic fiber optic monitoring work. It is my understanding that all large diameter pipes (48 inches or greater) will have gone through at least one round of inspections/maintenance/AFO monitoring by the end of FY13. Both the Montgomery and Prince George’s Councils have supported all of WSSC’s funding requests for its large diameter pipe work and it would be of great concern if this segment of pipe had been inspected recently and been found to not need any repairs or if acoustic fiber optic monitoring had been installed but is ultimately ineffective in providing an early warning of an impending break.
Please keep the Council informed as to your progress repairing the main, as well as any information you collect regarding the cause of the break.
Photo via WSSC
Chevy Chase Water Main Break Closes Connecticut Avenue
UPDATE 6:45 a.m. All WSSC customers are under mandatory water restrictions because of last night’s 54-inch water main break in Chevy Chase, which has northbound Connecticut Avenue shut down with downed trees and utility poles.
The break to one of the WSSC’s transmission mains happened at about 8 p.m. at the intersection of Connecticut Avenue and Chevy Chase Lake Drive and sent water shooting about 30 feet high, according to WSSC.
The mandatory restrictions mean WSSC’s 1.8 million customers in Montgomery and Prince George’s Counties must limit flushing toilets, put off washing clothes, limit the use of dishwashers, take shorter showers and turn off faucets after washing hands and while brushing teeth.
WSSC lost an estimated 60 million gallons of water from the break and wants to make sure fire departments and hospitals have adequate water service.
“Please don’t hoard water,” WSSC general manager Jerry N. Johnson said in a statement. “We’re not running out. But if everyone can cut their water use by 10 percent we should be OK. We appreciate everyone’s understanding and cooperation.”
The break occurred in a Pre-stressed Concrete Cylinder Pipe (PCCP), WSSC said. It went into operation around 1980 and WSSC said it was unable to determine the cause of the break. There are no customers without water service.
Washington Gas and Pepco officials have been working on the scene to secure natural gas and electric lines that run along the main.
Montgomery County Police this morning said Connecticut Avenue between Jones Bridge Road and East-West Highway would remain closed in both directions until Pepco clears power lines that came down and the area is deemed safe.
The southbound lanes open around 7 a.m.
WSSC said a violation of the mandatory water restriction carries a fine of up to $500.
Morning Notes
Small Businesses Face High Price of Operating in Bethesda — With longtime Bethesda favorite Bruce Variety on its way out of Bradley Shopping Center, other small business owners spoke about the financial challenges they face. [The Gazette]
WSSC Begins Final Paving, Opens 1 Southbound Lane of Connecticut Avenue — After yesterday’s water main break left all three southbound lanes at Franklin Street closed and flooded, WSSC says one lane is getting by this morning, the break is fixed and final paving should start at 9 a.m. [WSSC via Twitter]
No Metro Fare Hikes Coming This Year — Metro’s proposed fiscal year 2014 budget does not include a fare hike, consistent with the transit system’s policy to make fare change every two years. Metro raised fares last year. Significant track work and more maintenance work will continue. [Washington Post]
Flickr photo by eddie.welker
Water Main Break Closes Southbound Connecticut Avenue
A major water main break at Connecticut Avenue and Franklin Street has all southbound lanes of Connecticut Avenue closed this afternoon.
The break occurred around 11 a.m., breaking through asphalt and causing a significant pool of water on the three southbound lanes of Connecticut.
Police just reopened the northbound lanes. A WSSC crew was on the scene.
Morning Notes
At Long Last, Bethesda Metro Elevator Reopens — The delayed elevator rehabilitation project passed state inspection and reopened yesterday. Next up: The replacement of the station’s three 212-foot escalators, a more intensive project expected to begin sometime in 2014. [Robert Dyer @ Bethesda Row]
Southbound Wisconsin Avenue Lanes Remain Closed — Two of three southbound lanes on Wisconsin Avenue south of Bradley Boulevard remain closed this morning as WSSC crews continue work on a water main break from last night.
Montgomery County Courthouse Hosts First Same-Sex Marriages — Five couples were among the first same-sex marriages in Montgomery County yesterday when they were married in the county courthouse. [The Gazette]
Flickr photo by eddie.welker
UPDATED: Water Main Break Shuts Down Wisconsin Avenue in Chevy Chase
UPDATE, 7:45 a.m.: WSSC crews are still working on the water main break, which has left two of three southbound lanes of Wisconsin Avenue closed near the intersection with Dorset Avenue.
ORIGINAL: A water main break has shut down all lanes of southbound Wisconsin Avenue at Bradley Boulevard tonight.
The break was reported to WSSC at 5:37 p.m. Residents were told water service should be back later tonight.
Police were diverting southbound traffic to Bradley Boulevard and onto Connecticut Avenue and there was congestion into downtown Bethesda.
Morning Notes
Winter Weather Advisory Coming Tonight — The National Weather Service says a storm system will bring a wintry mix starting tonight and continuing Saturday to Central Maryland and the greater Washington area. [National Weather Service]
Third Person Dies From Christmas Eve Beltway Crash — A third passenger in a car that hydroplaned across the outer loop of the Beltway near Connecticut Avenue on Monday night died, according to Maryland State Police. [The Gazette]
Rockville Pike Water Main Work Continues — The two left lanes of southbound Rockville Pike just north of Cedar Lane remained closed early this morning, as WSSC crews continue to repair a broken water main and sinkhole. The State Highway Administration has been doing significant underground utility work there, including the installation of a 20- to 25-foot deep hole to replace the previous WSSC sewer line. [SHA via Twitter]
Flickr photo by nori127
