George Massey Tunnel

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The George Massey Tunnel (often referred to as the Massey Tunnel) is a highway traffic tunnel in the Metro Vancouver region of southwestern British Columbia. It is located approximately 20 km (12.4 mi) south of the city centre of Vancouver, British Columbia, and approximately 30 km (18.6 mi) north of the Canada-United States border at Blaine, Washington.

Construction, costing approximately $16.6 million in 1959 ($140 million in 2017), began on the tunnel in March 1957, and it was opened to traffic on May 23, 1959 as the Deas Island Tunnel. Queen Elizabeth II attended the official opening ceremony of the tunnel on July 15, 1959. It carries a four-lane divided highway under the south arm of the Fraser River estuary, joining the City of Richmond to the north with the Corporation of Delta (a municipality) to the south. It is the only road tunnel below sea level in Canada, making its roadway the lowest road surface in Canada.

The tunnel forms part of Highway 99. It is named for Nehamiah "George" Massey, a former Member of the Legislative Assembly of British Columbia. He represented Delta between 1956 and 1960, and was a long-time advocate of a permanent crossing to replace an existing ferry that crossed the south arm of the Fraser River. The tunnel was renamed the George Massey Tunnel in 1967, three years after Massey died. It is still sometimes referred to by its previous name, the Deas Island Tunnel. Dangerous goods are not allowed to pass through the tunnel.

Video George Massey Tunnel

Configuration

The tunnel is a single tube that is subdivided with a concrete wall, each side containing two traffic lanes. The typical traffic flow has two northbound lanes in the east tube and two southbound lanes in the west tube. In 1981 a counterflow system was introduced to meet increasing traffic demand in the tunnel.

At peak rush traffic periods, a reversible lane system is used, with a series of swing gates deployed that direct traffic in one direction to a single lane, while increasing the other direction to three lanes. Morning rush has three lanes northbound (inbound to Vancouver) and evening rush has three southbound lanes (outbound from Vancouver).

Maps George Massey Tunnel

Construction and maintenance

The tunnel is 629 m (2,064 ft) long and made up of six precast concrete sections (length: 344 ft (104.9 m); height: 24 ft (7.3 m); width: 78 ft (23.8 m)). The sections were floated into position by barge and then sunk into a shallow trench that had been dug into the loose sand and silt of the river bed. The trench and tunnel sections were then covered over with a protective layer of rock--500-pound (230 kg) stones filled 50 feet (15.24 m) out on each side, plus a bed of 1,500-pound (680 kg) stones on top. A structure located at each end of the tunnel houses the main ventilation and pumping equipment. Concrete retaining walls make up the approaches, which extend out about 400 m (1,312 ft) from the ventilation buildings. At its lowest point the roadway is about 22 metres (72 ft) below sea level, making it the lowest section of roadway in Canada. The Fraser River flows into the Strait of Georgia about 5 kilometres (3.1 mi) downstream from the tunnel.

Due to the tunnel being designed and constructed in the 1950s, very little consideration was given to seismic factors. The river bed is a 600 m (1,969 ft) thick layer of sediment on top of bedrock. This sedimentary layer may liquefy during a major earthquake, leaving the tunnel with nothing to rest on, and thus vulnerable to total collapse. In recent years, as the awareness of the effect of serious seismic activity developed, an engineering assessment and subsequent retrofit project was initiated to increase the survivability of the tunnel in the event of a significant earthquake. This retrofit project started in the fall of 2004 and had been completed by the spring of 2006.

In the interest of providing active protection for commuters from the danger earthquakes pose to the tunnel, an earthquake early warning system called Shakealarm was installed and commissioned in 2009. This was the first application of a commercialized earthquake early warning system (EEWS) to protect critical infrastructure in North America. Capable of detecting earthquakes with seconds to minutes of warning time the installation on George Massey Tunnel is designed to close the gates at either end of the tunnel so that no one can enter if a dangerous quake is inbound, and those already inside can exit as normal before shaking begins.

The tunnel was constructed for the British Columbia Toll Highways and Bridge Authority, and is now administered by the British Columbia Ministry of Transportation. It has not had a toll on it since the 1960s, when tolls were removed from all of the bridges and tunnels in the Lower Mainland. The initial toll was 25 cents; in 1964, George Massey became the last person to pay the toll, which was then 1 dollar.

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Non-motorized tunnel use

The tunnel is illegal for cyclists or pedestrians to traverse. A limited fare-free shuttle service is available year-round, during certain hours, and can carry tandems. Cyclists must wait at prescribed pickup points, but the van will make more than one trip if there are more than seven bicycles. Translink also provides year-round regular bus service through the tunnel with standard two-bike carrying racks. However, the lack of sufficient rack space translates to long waits for cyclists during peak hours. Cycling advocates have long advocated for improvement to this facility, as it is a major choke point limiting Vancouver-to-Tsawwassen Ferry bicycle traffic.

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Height limit

The tunnel has a posted height limit of -> 4.15 m (13 ft 7 ³/₈ in) <- in both directions. The replacement bridge, to be constructed starting in 2017, will likely eliminate the current height restrictions for over-height vehicles in the tunnel.

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Replacement

On February 16, 2006, it was reported that the provincial government had plans to expand the tunnel's capacity, from four lanes to six, dubbed the "H99" project. There has been no progress on this score and contradictory government statements since then, so future upgrades are an uncertain prospect.

On September 28, 2012, Premier Christy Clark announced plans to replace the aging tunnel within 10 years, addressing the congestion and safety issues currently plaguing the structure. On November 21, 2012, it was announced that the Ministry of Transportation and Infrastructure is leading a multi-stage planning initiative, including seeking public input on replacement options for the tunnel to determine a number of options for its replacement.

On September 20, 2013, Premier Clark announced that construction on a new bridge to replace the tunnel will begin in 2017. On December 16, 2015, British Columbia Transportation Minister Todd Stone announced detailed plans to spend $3.5 billion on a bridge and interchange improvements to replace the tunnel. In July 2016 the BC Environmental Assessment Office (EAO) started an environmental assessment of the project and on February 9, 2017 the replacement received environment approval from the B.C. Ministry of Environment. Preliminary work went out for tender in January 2017 to start the process of improving ground conditions for the future widening of the project area.

The Metro Vancouver mayors spoke out against the replacement plan in June 2016, marking "the first time the mayors, who make up the Metro Vancouver Board, have spoken out collectively against the $3.5-billion crossing." The mayors sent a letter to the B.C. government and the federal Minister of Environment and Climate Change, Catherine McKenna, to get the federal government to do an environmental review of the project. In February 2017, the federal government denied the request of the mayors for a federal review. The official groundbreaking for the project took place on April 5, 2017 and was met with protesters. The project has awarded two contracts for the site preparation and drainage improvements from Bridgeport to Steveston Highway and improvements south of the tunnel.

Timeline

2012

• September 28 - Announcement to begin the process to replace the George Massey Tunnel
• November - Phase 1 consultations begin

2013

• March - Phase 2 consultations begin
• September - A bridge is chosen to replace the tunnel

2014

• January - The northbound Steveston off-ramp is lengthened and the Massey Tunnel project office opens

2015

• December - Phase 3 consultations begin

2016

• March - Phase 3 consultation results are released, showing strong support for the replacement of the Massey Tunnel with a bridge
• October - The BC Government requests 3 pre-qualified teams to participate in submitting Request for Proposals (RFP)
• December - The BC Government announces that the Massey Tunnel replacement won't suffer from ice bomb issues (snow and ice releasing from overhead cables in warming conditions and falling onto vehicle deck) like the Port Mann and Alex Fraser bridges

2017

• January - Two contracts for preliminary construction work go to tender
• February - George Massey Tunnel Replacement project is granted Environmental Assessment approval
• March - Massey Tunnel Replacement project is granted Agricultural Land Commission (ACL) approval with expected net increase in farmland
• April 5 - The official groundbreaking of the George Massey Tunnel Replacement; construction is officially underway
• September - The newly elected BC Government puts George Massey Tunnel Replacement on hold and launching an independent technical review

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See also

• List of bridges in Canada
• List of crossings of the Fraser River
• Lists of tunnels
• Tsawwassen Ferry Terminal -- major periodic traffic source

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References

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External links

• 1959 Government documentary about the construction of the tunnel
• Film of the official opening of the tunnel by Queen Elizabeth on July 15th 1959
• Satellite photo of George Massey Tunnel from Google Maps
• "Prefab Tunnel Conquers A Tough River" , March 1959, Popular Mechanics detailed article on what was then the Deas Island Tunnel
• George Massey Tunnel Bicycle Shuttle
• Kenaidan Seismic Retrofit Project
• Journal of Commerce article on tunnel
• George Massey Tunnel Replacement Project

Source of the article : Wikipedia