MARY SCHWALM/Staff photo Paul Boulanger taps a maple tree by the light of his headlamp and drill on the Stevens Estate in North Andover. Boulanger and his partner Kathy Gallagher, who own and operate Turtle Lane Maple Farm, hope to be open for sugar house tours at Turtle Lane in North Andover this weekend. Find them on Facebook or drive by on Salem Street and look for the sign! 3/9/14

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