The Rockport Lime Kilns
Built of granite and field stone with interiors lined with fire brick, the kilns were enclosed by great wooden, flat roofed sheds. Some kilns were topped with iron stacks made of boiler plate. Most kilns were wood burning with the exception of the triple “Pets” shown in the drawing. These burned soft coal. All were loaded with limerock at the top from a trestle built along the back. Fires were fed continuously day and night except for a half hour before it was time to “draw” out the kiln every four hours. Partially burned lime was hauled
Through the efforts of Mr. Ambrose Cramer, these kilns, the last surviving evidence of Rockport’s industrial past, were declared an historic site in 1970. Under the direction of his widow, Mary Cramer. The lime kiln restoration committee was formed in 1976 in order to restore and stabilize the kilns. In 1983, a matching grant permitted the preservation of the most unusual triple kilns so that the interior can be seen.
Top inset: The railroad brought in limestone (calcium carbonate, CaCO3) from the local quarries which was dumped into the top of the kilns to form a charge.
Middle inset: Heating the limestone breaks the bond between calcium oxide and carbon dioxide to form common or lump lime used to make plaster or mortar.
Bottom Inset: After processing, the lime was put into watertight casks for shipping to Boston and New York markets. Any water coming into contact with the lime could cause a fire aboard ship.
Topics. This historical marker is listed in this topic list: Industry & Commerce.
Location. 44° 11.193′ N, 69° 4.443′ W. Marker is in Rockport, Maine, in Knox County. Marker can be reached from Pascal Avenue. MArker is in Rockport Marine Park. Touch for map. Marker is at or near this postal address: 111 Pascal Avenue, Rockport ME 04856, United States of America. Touch for directions.
Other nearby markers. At least 8 other markers are within 5 miles of this marker
Credits. This page was last revised on October 9, 2018. It was originally submitted on October 7, 2018, by Steve Stoessel of Niskayuna, New York. This page has been viewed 120 times since then and 57 times this year. Photos: 1, 2, 3. submitted on October 7, 2018, by Steve Stoessel of Niskayuna, New York. • Andrew Ruppenstein was the editor who published this page.