Sandy Point Road Water System Analysis

Project Description
The neighbourhood along and at the end of Kennebecasis Drive had experienced limited or inadequate water flow/fire flow pressure and chlorine residual. There was a strong demand for residential development in this area. The current single watermain in the area was not adequate to support further demand. The City of Saint John wanted the servicing in this area reviewed to improve the level of servicing to existing users in the Kennebecasis Drive area, and to allow for additional development.

Services Provided
Terrain Group reviewed five remediation options to address the problems in the area. To complete this work, population projections were determined under three growth scenarios. The study area included the University of New Brunswick (Saint John Campus) and the Saint John Regional Hospital. This servicing review included the water distribution system and the sanitary sewer system.

Terrain prepared an add-on to the City’s existing model for their water system, using Haestad Method's WaterCad. Terrain constructed and calibrated a model for the water system and tested many scenarios to determine the most effective solution to address existing water problems. The model also provided for additional service for the growing area, including projected growth at the University.

Terrain reviewed the existing sanitary system and made recommendations as to the possible extension of the sanitary system to facilitate further development of the area. To ensure that the sanitary sewer was able to drain by gravity without pumping stations, a survey was necessary of Sandy Point Road and Kennebecasis Drive since these roads have many hills and hollows. Terrain used innovative technology by connecting a Global Positioning System (GPS) receiver to a vehicle and driving along the road. The GPS receiver automatically took topographical point shots on a time basis, producing an economical accurate ground surface profile of the road and enabling Terrain to more accurately determine how far the gravity sewer could extend without requiring a pumping station.