Excavations Lafontaine Inc, is a company specialized in street/road construction and rebuilding, water and sewer installations, serving the Chaudière-Appalaches and Greater Québec regions.

Business started in 1975 when Frank Lafontaine, an experienced machine operator, founded in Saint-Malachie a heavy equipment rent-by-the-hour company mainly serving farmers; he joined three of his sons into the venture.

The oldest, Frankie, took charge of the family business in 1982 and decided to redirect its activities to that of a general contractor. A year later, a first civil engineering technician was hired. In 1990, Excavations Lafontaine inc. moved to Sainte-Claire's industrial park to be more visible and keep its technical personnel. Since then, there have been six building expansions or additions, as well as the acquisition of several gravel pits and a quarry.

In 1998, the company was among the first in its line of business to get ISO certification. That same year, the company opened a quarry in Saint-Gervais de Bellechasse, in partnership with Concassés de la Rive-Sud inc. Then, in 2000, the company added snow removal to its spectrum of services. In 2003, it acquired another significant sand bank and opened office in Lévis to better serve the Quebec region market.

In 2006, the administration and estimation departements came together in the Levis' offices to improve the internal communications, but the garage is still in Ste-Claire.

The company mainly finds its clients within a 1 ½ hour radius (by road) of Quebec City. Its specialty, i.e. executing public infrastructure projects, defines a market in which 75% is necessarily centered on the ministère des Transports du Québec, municipalities, RCMs, municipal corporations, and, to a lesser extent, Defence Canada. The other 25% comes from the private sector, i.e. housing developments, industrial and commercial businesses, farms, and individuals.

During the last ten years, the Excavations Lafontaine inc.'s sales increased substantially, from $4.5 million to more than $30 million a year.