20160118 Davenport Public M
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DAVENPORT DIAMOND DESIGN DIRECTION January 18, 2016 DAVENPORT DIAMOND We need to separate freight and passenger rail traffic at the Davenport crossing The Canadian Pacific (CP) line is one of the busiest freight corridors in Canada. Nineteen east-west freight trains travel along this corridor every day. The CP freight line crosses a set of north-south tracks at Davenport which carry about 4 million GO train passengers a year along the GO corridor. This level crossing is called a NOW: The rail “diamond” on the Barrie Corridor, where GO passenger rail intersects with the CP freight line rail ‘diamond’ — and the Davenport Diamond is one of the last high-traffic rail crossings in Toronto. By 2025, the plan is to offer two-way, all-day 15-minute service with a new fleet of electrified trains for a pro- jected annual ridership of 22 million. For residents of Toronto, regular, all-day 15-minute GO Train service will mean new, faster transit options for getting around the city and a transportation network that can support the business growth and investment that is needed for a vi- brant, healthy local economy for generations to come. Running more frequent, reliable scheduled service will not be possible with the long delays that would be caused by freight train traffic at the crossing. Removing the Davenport Diamond will mean a greater level of reliability Future: Removing the rail crossing will enable more frequent, reliable service, and end the “clickity-clack” and safety for trains travelling noise of both freight and passenger trains passing over the diamond. through the Davenport community. DAVENPORT DIAMOND Removing the rail crossing is complicated for several reasons Cross Section of the Guideway Option* * The vertical scales (heights) are exaggerated by a factor of 10. If the vertical scale was the same as the horizontal scale, details such Cross Section of the Tunnel Option* as the grade separations would be too difficult to see. Can the CP freight line run above or below the ral slope is the equivalent of a three-storey building. This GO corridor? slope is an important factor in deciding whether to build The simple answer is no: the CP line falls under fed- an underpass or overpass. eral jurisdiction, which means that it cannot be forced to build a new bridge or tunnel for its trains. There are Throughout construction, GO Transit must maintain regu- also basic engineering constraints: because the freight lar service for the 10,000 passengers who take the train trains running along the corridor are much longer and each day. We are also committed to minimizing incon- heavier than GO passenger trains, the slope of any venience for drivers, cyclists and pedestrians who use bridge or tunnel would need to be much more gradual, neighbouring roads and sidewalks. Construction impact is lengthening the span and impacts of any new structure. one of several factors we consider when evaluating differ- Not only would this be very costly, it would also be in ent infrastructure choices. conflict with the recently constructed West Toronto Dia- mond Grade Separation. What about the Missing Link Report? The Missing Link Report has been mentioned as an al- Passing under the GO tracks would mean constructing ternative approach. The Missing Link is a study looking an almost 6 km trench running from Runnymede Road at the possibility of building a new corridor that would di- to Christie Street, with new road overpasses at each vert freight traffic off the Milton and Kitchener corridors of the nine north-south streets, as well as reconstruct- to allow for the increase of GO train service to communi- ing the West Toronto Diamond Grade Separation. The ties along the lines. Metrolinx has been working with rail trench would create significant engineering problems and municipal partners on this study, however, for it to for the CP line, including the connection to its Lambton become a reality, it would require competitors CP and CN freight yard and its two connections to CP’s MacTier to work together and agree to share the same corridor, subdivision that runs north from the former West To- considerable new government funding to purchase the ronto Diamond. Going over would involve an almost six line which is estimated to be $5 billion, and an environ- kilometre bridge which would create similar significant mental assessment. This process could take more than engineering problems for the CP line to connect with a decade and will severely limit GO Transit’s ability to pro- their Lambton freight yard and the two connections to vide urgently needed rail services to passengers. Should its MacTier subdivision. all these pieces come together, the increase in passenger train traffic would still result in the removal of the Daven- Geography port Diamond to improve reliability and safety. Even though it might look flat, the GO corridor climbs a significant slope as it travels from Bloor Street West past Davenport Road and onwards to St. Clair Avenue West. Between Bloor Street West and Dupont Street, the land rises 7.7 metres. Between Dupont and St. Clair, the land rises 11.5 metres. Combined, this natu- OVER OR UNDER? OVERPASS OR TUNNEL? Two engineering options There are two options to separate the GO passenger line terms, the tunnel option would cover an area to the north of from the CP freight line at the Davenport Diamond: Go about 4 km, compared to an overpass, which covers 1.4 km. over or go under. Metrolinx has carefully studied the engi- Both options were evaluated to look at their impact on the neering and construction challenges, community impact community and the region, including: and cost of building either a tunnel or a raised overpass. Both options support two-way, all day transit service by separating passenger and freight rail traffic, and both cre- ate the potential to add a new future GO station at Bloor Street West. Both options share a starting point just north of Bloor Street West, which is necessary to protect for a potential future station at this location. In comparative Key Questions Overpass Tunnel 1. Will they support the regional transit network and a new station at Bloor Street? • Support two-way all-day transit service by separating passenger rail • Support two-way all-day transit service by separating passenger rail Assessment and freight rail traffic and freight rail traffic Both options support provincial objectives for • Create the potential to add a new GO station at Bloor Street • Create the potential to add a new GO station at Bloor Street frequent two-way, all-day GO service and make it possible to develop a new station at Bloor Street 2. How much is it expected to cost? • The Overpass is estimated to cost between cost Assessment $195-$210+ Million to construct The Overpass option will be less than a third of the • Includes design and public realm improvements in the form of inte- • The Tunnel is estimated to cost $625-$675 Million to construct cost of the Tunnel option. This includes consider- grated art, lighting, Greenway/multi-use pathway and structural de- ation for the additional money that will be spent sign on public realm improvements to help integrate the Overpass into the neighbourhood 3. How will construction affect the community? • 5 to 6 years to construct • Construction will impact a 4 km area • Approximately 6,600 people are impacted who live within 150m • Significant construction noise impacts at staging and trenched areas with moderate construction noise in tunneled areas for a longer term Assessment (5 to 6 years) • 76 individual property parcels are affected by construction, with The Overpass option results in the least amount • 2 years to construct 24 needing to be purchased, for a total area of approximately of impact during construction. The Tunnel option • Construction will impact 1.4 km 34,680m2 results in a significantly longer construction period • Approximately 3,900 people are impacted who live within 150m • Significant vibration impacts for the entire length of the tunnel and and impacts an area 20% larger than the • Moderate construction noise impacts for a shorter term (2 years) trenched areas. Vibration impacts driven in the south trench will Overpass option. The need to build trench walls at • Localized vibration impacts during during pier construction travel significantly farther due to soil conditions either end of the tunnel will result in significantly • Soil disturbance and disposal is limited • Extensive piles need to be installed to build trenches leading to • The Siberian Elms at Campbell Avenue Park can be protected • significant construction noise more noise for adjacent communities. Staging • Limited temporary easements will be required for the construction • Approximately 300 trucks a day at peak period expected requirements will require numerous sites through- • Construction of the overpass will only require a short-term closure of • Campbell Avenue Park will be used as the main tunnel support site. out the neighbourhood, extensive truck traffic and Wallace Avenue, which will be lowered by 0.5 metres This will require the removal of mature trees the loss of mature trees at Campbell Avenue Park. • Approximately 120 trucks a day at peak period expected • 16 properties will be impacted including St. Nicolas of Bari School The Overpass option can be built without using or property acquiring any additional properties. In contrast, • Construction of the tunnel approaches will require a prolonged closure of Wallace Avenue during construction which will be raised the Tunnel option will require temporary construc- by about 1 metre affecting adjacent property access tion and permanent property requirements. • Significant vibration impacts for the entire length of the tunnel and trenched areas.