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	MTA - History of The Central Artery / Tunnel Project
		This came to be known as the Dewey Square or South Station Tunnel.
		Central Artery construction concluded in 1959 with the opening of the Dewey Square Tunnel and the Southeast Expressway to Braintree.
		The Williams Tunnel interchange in South Boston is at the center of a vital new development area for Boston, the seaport, with a new convention center and related projects.
	www.massturnpike.com /bigdig/background/history.html (880 words)

	Big Dig - Wikipedia, the free encyclopedia
		Tunnel workers encountered many unexpected barriers, ranging from glacial debris to foundations of buried houses and a number of sunken ships lying within the reclaimed land.
		A tunnel underneath Leverett Circle connecting eastbound Storrow Drive to I-93 North and the Tobin Bridge opened December 19, 2004, easing congestion at the circle.
		As of late 2004, leaks have sprouted in the tunnel.
	en.wikipedia.org /wiki/Big_Dig (1959 words)

	Dewey Square Tunnel - Wikipedia, the free encyclopedia
		The Dewey Square Tunnel in Boston, Massachusetts, is part of Interstate 93, running under the heart of the city's financial district, including Dewey Square.
		Known to locals as the South Station Tunnel (due to its proximity to the city's main train station), the Dewey Square Tunnel is of cut-and-cover design, and originally was six lanes wide (three in each direction), with no breakdown lanes.
		The tunnel was rehabilitated and now serves as exclusive southbound lanes of I-93, complete with a new ventilation system and gently sloped curves (like the curves on the corners of a race track).
	en.wikipedia.org /wiki/Dewey_Square_Tunnel (331 words)

	Infrastructure
		We went to the tunnel, however, and walked its entire length, inspecting the point where the fire seemed to be the worst and where the pavement in the roadway was rough with holes.
		Since the walls of these tunnels are flat fl from the years of use, it was impossible to ascertain from the smoke patterns on the wall and ceiling which way the smoke went from the fire scene.
		The Frejus Tunnel lies between Lyon, France, and Turino, Italy, and is the shortest route between Brest, Paris, and Lyon in France and Turino, Milano, and Rome in Italy.
	www.firetactics.com /FHWA2.htm (14349 words)

	Dig's next squeeze may be tightest yet - The Boston Globe
		In about 10 months, when the Dewey Square tunnel is renovated and linked to the new Big Dig tunnel, the project will be almost entirely done, and drivers will have the run of five lanes through the one-third-mile stretch.
		The reason for the temporary detour is that the Dewey Square tunnel, built in 1959 after officials decided to bury the Central Artery through Chinatown, is being readied for reuse.
		The tunnel has to be gutted and brought up to modern highway standards, which call for gentler curves and a slight, racetrack-like banking in the roadway to accommodate higher speeds.
	www.boston.com /news/local/massachusetts/articles/2004/02/27/digs_next_squeeze_may_be_tightest_yet?mode=PF (1076 words)

	Encyclopedia: Dewey Square Tunnel (Site not responding. Last check: 2007-10-07)
		The Dewey Square Tunnel in Boston, Massachusetts, is part of Interstate 93, running under the heart of the city's financial district.
		The Dewey Square Tunnel is receiving new life as part of the massive Central Artery/Tunnel ( Big Dig) project.
		When the tunnel was built, part of the unused upper level of the MBTA Red Line tunnel was removed; this level is now used for storage, and further northwest as the Winter Street Concourse, a walkway inside fare control between Park Street and Downtown Crossing stations.
	www.nationmaster.com /encyclopedia/Dewey-Square-Tunnel (303 words)

	Tunnel engineering highway road construction structures transportation design planning
		This tunnel project is part of the widening of State Highway 160 (SH 160) located in the narrow canyon at the southwestern end of the SH 160/Wolf Creek Pass road widening project.
		The tunnel is a bi-directional, a two-lane tunnel with allowances for shoulders and walkways.
		The tunnel is a design-bid-build contract and was successfully advertised and the Contractor is awaiting a notice to proceed.
	www.mrtunnel.com /page2.htm (3587 words)

	The Big Dig (Site not responding. Last check: 2007-10-07)
		The South Boston connection (or interface) between the underwater section of the Ted Williams Tunnel and the land-based approach was built in the widest and deepest circular cofferdam in North America.
		The Ted Williams Tunnel interface in East Boston between the land-based approach and the underwater portion is 90 feet below the surface of Boston Harbor, the deepest such connection in North America.
		In fact, to make the first grouting gallery tunnel possible, the entire water table in Dewey Square had to be temporarily lowered by sinking wells to pump out the groundwater.
	www.engineering.com /content/ContentDisplay?contentId=41007012 (2610 words)

	Big Dig - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-07)
		The project was first conceived in the 1970s to replace the rusting elevated six-lane freeway (officially the John F. Fitzgerald Expressway) that separated downtown from the waterfront, and which was increasingly choked with bumper-to-bumper traffic.
		On January 17, 2003, the opening ceremony was held for a 1.3-mile tunnel section of the Dig, extending the Massachusetts Turnpike ( Interstate 90) east to Logan Airport.
		Remaining work still to be completed includes the refurbishment of the Dewey Square Tunnel and construction of final ramp configurations in the North End, at Leverett Circle, and in the South Bay interchange, plus reconstruction of the surface streets and establishment of new city and state parks.
	www.netipedia.com /index.php/Big_Dig (917 words)

	The Big Dig
		The new Central Artery (the first section, from the Mystic bridge to North Street and the Sumner Tunnel, opened in October 1954) was ugly, it was a barrier between neighborhoods, and the land underneath wasn't terribly useful, with traffic flow confusing and inefficient.
		The DPW decided to sink the remainder of the highway into a tunnel from Congress to Kneeland Streets, which came to be called the Dewey Square or South Station tunnel.
		Planners decided to put the southern portion from the Fort Hill neighborhood past Congress Street and Dewey Square to Kneeland Street in a tunnel, because they realized that the elevated portion of the highway was too obtrusive and disruptive in the midst of downtown life.
	www.newcolonist.com /bigdig.html (1001 words)

	NFPA :: Publications :: NFPA Journal® :: May / June 2003 :: Cover Story (Site not responding. Last check: 2007-10-07)
		For a tunnel to fall under the requirements of NFPA 502, it must be 300 feet (90 meters) or greater in length.
		BFD is responsible for responding to incidents in the Interstate 93 tunnel, along with the fire departments from neighboring Cambridge, Somerville, and Logan Airport.
		The West Virginia Memorial Tunnel testing also provided project operators with enough data to conclude that the proper use of the ventilation system during a fire can be of substantial value in controlling smoke and can play a significant role in slowing the growth of a fire until firefighters arrive.
	www.nfpa.org /displayContent.asp?categoryID=728 (3282 words)

	NETransit: Abandoned Stations, Tunnels, and Station Entrances found on the MBTA (Site not responding. Last check: 2007-10-07)
		However, a small tunnel remnant is still used by the MBTA as a utility room and another small portion is used by City Hall as an underground records storage area.
		The incline and tunnel that the streetcars used, to enter the station, is now occupied by an escalator to the surface.
		Part of the trolley tunnel was used to create a new fare collection area for the Red Line station when it was modernized in the 1980s.
	members.aol.com /eddanamta/abandoned/abanstas.html (1530 words)

	Boston.com / News / Traffic / Finishing the Big Dig / Transcript of Anthony Flint transportation chat
		Traffic may get backed up when it moves from the new tunnel into the mouth of the dewey square tunnel at first (an unfamiliar move), but there shouldn't be a bottleneck crossing the Charles.
		There is room for four, but they are not going to open that fourth lane (the HOV lane) until the dewey square portion is ready.
		and then you cross over into the east bore of the dewey square tunnel (as you do now) and everything is the same as it is now (exit 22 to chinatown on the left, exit 20 for albany street and I-90 west on the right).
	www.boston.com /news/traffic/bigdig/articles/121703_flintchat (2424 words)

	Mass. Electric Construction Comany (Site not responding. Last check: 2007-10-07)
		To renovate and expand the existing Dewey Square Tunnel and elevated highway would have required shutting down at least one lane of traffic for the duration of the project – not a viable option for a highway that is already seriously overcrowded.
		Constructing tunnels in the congestion of the downtown area of a major city required the use of many innovative and complex engineering techniques.
		The Tunnel Electrical Finishes contract is not expected to be complete until 2005, a year after most of the other work on the Artery is finished.
	www.masselec.com /news/spring_2002/News5.htm (900 words)

	Modern Continental Companies: Work begins on C17A6 as new CA/T projects lie ahead
		Modern Continental crews have begun excavation and bracing work on a new 900-foot section of the I-93 southbound tunnel, and have also started to brace the existing boat section approach to the Dewey Square Tunnel.
		The southbound tunnel, which will reach depths of nearly 90 feet in some places, will eventually tie into a reconfigured Dewey Square Tunnel, completing the underground construction downtown.
		Eventually, the south portal of the new tunnel will be tied into the new viaducts and ramps south of the city.
	www.moderncontinental.com /pr_newcat.htm (375 words)

	Haley & Aldrich Wins Grand Conceptor Award (Site not responding. Last check: 2007-10-07)
		Haley and Aldrich was responsible for geotechnical and tunnel design services under subcontract to the Joint Venture.
		Tunnel construction had to provide support for the existing Massachusetts Bay Transit Authority Red Line subway station, the landmark South Station rail and transit terminal, and a planned Silver Line bus transitway.
		The 2,200-foot-long tunnel section will accommodate four lanes of northbound traffic, and the completed Central Artery will increase highway capacity for more than 240,000 cars per day.
	www.haleyaldrich.com /1-24-02.html (239 words)

	TheBostonChannel.com - News - Taxpayers Get Good Big Dig News
		The last piece of the $14.6 billion project, the Dewey Square Tunnel, was originally slated to be completely redone, but engineers found the tunnel to be in such good shape it only requires a rehab job.
		The Dewey Square tunnel was built in 1956.
		When I-93 southbound opens on Dec. 19, motorists will be driving in the tunnel's lanes already in use, but behind the tunnel's walls, workers will be gutting and rehabbing the other side.
	www.thebostonchannel.com /news/2697430/detail.html (371 words)

	Dewey Beach Real Estate Dewey Real Estate, Dewey Beach Realtor Dewey Beach
		Dewey Beach Real Estate Dewey Real Estate, Dewey Beach Realtor Dewey Beach
		If you are looking for real estate in the Dewey Beach area, you have just found your internet source for ALL properties in Dewey Beach and the surrounding area.
		Here, you get ALL of the information you need…...ALL properties that are listed “For Sale”, ALL properties that have sold over the last year, and ALL of the community information that you could ever want for Dewey Beach.
	www.dewey-beach-properties.com (96 words)

	TheBostonChannel.com - News - Big Dig Changes May Bring Big Traffic Woes
		NewsCenter 5's Gail Huff reported that traffic inside the tunnel is being diverted up to the surface because of a lane reduction inside the tunnel.
		It's one of the most challenging phases of the $14.6 billion Big Dig project and the temporary change is expected to have a significant impact on traffic.
		Officials are watching to the extent to which traffic is slowed as a result of the change, which shrinks three southbound lanes down to two lanes just before the entrance to the Dewey Square Tunnel.
	www.thebostonchannel.com /news/2974160/detail.html (369 words)

	2003 - Wikipedia, the free encyclopedia
		Central Line train crashes into the tunnel wall at Chancery Lane station in London, injuring 34 people.
		An international group of volunteers left London and headed for Baghdad to act as voluntary human shields, hoping to avert a U.S. invasion.
		May 26 - A draft of the proposed European constitution is unveiled.
	en.wikipedia.org /wiki/2003 (2759 words)

	Road Traffic Technology - The Big Dig - Boston, Massachusetts
		The southbound lanes will continue to use the existing Dewey Square Tunnel until it is completely refurbished.
		Designed to link the existing infrastructure with the new, the interchanges will be a mix of over ground and underground and form a vital part in relieving traffic pressure and ensuring smooth traffic flow and cross city access.
		Providing transport under the harbour the underwater part of the Ted Williams Tunnel was built using 12 steel sections sunk in a trench to cover the.75-mile distance.
	www.roadtraffic-technology.com /projects/big_dig (934 words)

	Weidlinger: Tunnels & Subways (Site not responding. Last check: 2007-10-07)
		Redesign of cast-in-place tunnel into slurry wall to save $6 million for 700-foot section of tunnel surfacing into ramp on I-93, 50' wide and 27' tall circling Fort Point Channel.
		Finite element study of effect of CA/T and MBTA excavations on structural behavior due to depressurization of glacial till and bedrock.
		Renovation of platform and 82-foot-long tunnel extension, using cut and cover and soft ground tunneling methods.
	www.wai.com /Structures/Projects/proji-tunnels-subway.html (675 words)

	Big Dig - Art History Online Reference and Guide (Site not responding. Last check: 2007-10-07)
		The project included the Ted Williams Tunnel ( Interstate 90) to Logan International Airport and the Zakim Bunker Hill Bridge over the Charles River.
		Governor John Volpe interceded in the 1950s to send the last section of the Central Artery underground, through the South Station Tunnel, but while traffic moved somewhat better the other problems remained.
		The project was conceived in the 1970s to replace the rusting elevated six-lane freeway (officially the John F. Fitzgerald Expressway) that separated downtown from the waterfront, and which was increasingly choked with bumper-to-bumper traffic.
	www.arthistoryclub.com /art_history/Big_Dig (1908 words)

	BostonHerald.com - Local/ Regional News: Dirt, gravel rain down on motorists in Big Dig tunnel (Site not responding. Last check: 2007-10-07)
		OSTON - Dirt and gravel rained down on traffic inside one of the Big Dig tunnels on Tuesday morning, causing minor damage to several vehicles and forcing the temporary shutdown of two lanes.
		The debris fell from an air shaft in the rehabbed Dewey Square tunnel, which serv...
		Debris fell from an air shaft in the rehabbed Dewey Square tunnel, which serves as the southbound Interstate 93 tunnel.
	news.bostonherald.com /localRegional/view.bg?articleid=76731 (246 words)

	Law Offices of Stephen P. Rahavy - Contact Us
		Upon exiting the South Station/Dewey Square tunnel, take Exit 22, "Northern Avenue/Atlantic Avenue," and bear left at the fork in the ramp.
		Parking is available in the Post Office Square garage, which can be accessed by turning left on Franklin Street and then turning right onto Pearl Street.
		Follow to Post Office Square: We are located at the corner of Oliver Street and Milk Street.
	www.stephenrahavy.com /directions.htm (460 words)

	GAW Visits the Big Dig
		On August 25, 2002, WalkBoston, the Central Artery/Tunnel Project, and the City of Boston sponsored a walking tour of a part of the Central Artery which is nearly complete.
		The actual tour began at the southern portal of the northbound I-93 tunnel, behind the Mass.
		Unfortunately, only a very short segment of the tunnel was available to be toured, not more than half a mile out and back, from the portal north to the Dewey Square curve where the northbound and southbound tunnels first meet up.
	gallery.bostonradio.org /big-dig-walk (269 words)

	Weidlinger: Highways & Site Work (Site not responding. Last check: 2007-10-07)
		Improvement of highway tunnel under Dewey Square to meet current interstate highway standards using drift tunnel construction techniques.
		Development of roof down construction method for 70-foot-deep section of Central Artery Tunnel carrying 8 traffic lanes and extending 915 feet.
		Tunnel extension of 72 feet to MBTA station, track work, drainage.
	www.wai.com /Transportation/Projects/proj-highways.html (769 words)

	News - Archived Press Releases
		On Sunday, April 4, 2004, the Central Artery Tunnel Project also know as The Big Dig, completed one of its last and most complex traffic shifts.
		The Dewey Square Tunnel I90 Collector was opened to traffic and will temporarily handle all of the artery's south bound traffic.
		The traffic shift will allow the remaining portion of the Dewey Square Tunnel to be renovated to accommodate a total of five south bound lanes of traffic.
	www.citylightselectrical.com /news/I90-Collector.asp (140 words)

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