BUZZ-Waste Connections Inc: To buy Progressive Waste Solutions
** U.S.-based solid waste collection company's shares up 5.7 pct at $53.88; stock on track for best day in nearly 3-1/2 years
** Company to buy Canada's Progressive Waste Solutions Ltd for $2.67 bln to expand in Canada
** The $24.55 per share offer represents a premium of 4.4 pct to the last closing price of Progressive Waste's U.S.-listed stock
** Says combined company will be domiciled in Canada after the deal closes in the Q2 2016
** Progressive Waste Solutions' U.S.-listed shares up 8.2 pct at $25.44
** Up to Friday's close, Waste Connections shares had risen 17.6 pct in the past twelve months
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