E., Toronto 12, Ont. Branch Offices: Hamilton, Kitchener, London, North Bay, Ottawa, St. Catharines, Sault Ste. ... Consulting Engineers a Town Planners Landscape Architects Town and Regional Planning, Urban Renewal, Subdivisions, Park Developments, Marine ... Open flow meters are centred in flow measuring area from 10- to 42-in. in diameter ... insurance of positive head at all times; simplicity of operation and maintenance; low installed cost; and minimum space requirements.