client: City of Gloucester
location: Gloucester, Ontario
project description:
In 1978/79 a 72-inch dia. (1.83 m) asphalt coated Corrugated Steel Pipe (CSP) storm sewer was installed on Belcourt Boulevard from St. Joseph Boulevard to Carriere Street, 580 m in length and ranging in depth from 4 m to 9 m. Due to ground conditions the CSP started deforming and subsequent road surface failures occurred. Since then, various interim measures were implemented to avert the deformation of the CSP. This resulted in a loss of hydraulic capacity in the storm sewer. In 2000, the City of Gloucester retained R.V. Anderson Associates Limited (RVA) to develop a long term solution that would address the structural integrity of both the storm sewer and road structure, as well as meet the future hydraulic needs of the community. An assessment of the storm sewer and adjacent utilities resulted in a preferred solution of replacement of the storm sewer, water main, sanitary sewer and full road replacement, and relocation of the Bell and natural gas facilities, to be completed in a two phased approach. An open house was held to obtain input from the effected public and area businesses. RVA prepared a Preliminary Design Report, detail design and contract documents. Due to the depth of the storm sewer and potential community disruption an extensive traffic and public relations plan was prepared and implemented during the construction period. Specialized shoring to protect the adjacent utilities and maintain soil stability during excavation was required. During construction all services had to be maintained, as such a bypass plan was developed and implemented for the storm sewer, sanitary sewer and water main. The project involved close liaison with the City's public relations department, traffic department and transit department, utility company's for the relocation of Bell and gas facilities, and public.
project status:
Tender specifications were produced and Phase 1 of the project (southern 250 m) was completed at a contract value of $1.8M. The 1800 mm CSP was replaced with a 2100 mm concrete sewer. RVA provided contract supervision and administration of the contract. Under Phase 2, 350 m of 1800 mm CSP storm sewer was replaced with 1800 mm concrete sewer, up to 7.5 m deep. The 525 mm sanitary sewer, 203 mm water main and the full road infrastructure including curbs, sidewalks and private driveways were also renewed. The final lift of asphalt over Phase 1 and 2 was later laid. |
