Asbury Grist Mill
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PREVIOUS CONSERVATION WORKSHOPS

 
STRUCTURAL STABILIZATION/
SITE CONSERVATION WORKSHOP
ASBURY GRIST MILL
ASBURY, NEW JERSEY USA

Workshop led by: Walter Hollien
Date: July 2003

Project Details

Restoration work at the Asbury Mill was largely a local effort with most participants coming from the mill's own state of New Jersey. All were keenly interested in learning more about mills as well as building conservation techniques.

The Asbury Mill was built along the Musconetcong River in 1863, on the site of a pre-Revolutionary mill. The building was converted from a flour mill to a graphite mill in 1895, and is considered to be one of the few adaptations of water power to an important twentieth century industry. The Asbury Graphite Company operated the mill until the 1980's, and production continues across the river at a 1930's plant. The non-profit Musconetcong Watershed Association assumed ownership of the mill in 1999.

The mill's interior is as it was when production ended, complete with a comprehensive coating of graphite. A full tour and exploration of the site was accompanied by history of the milling process and equipment. Restoration work done to date was also explained. That work had begun two years before with removal of the dormer and fire escape, flashing and capping of the chimney, and increasing support of the slate roof by lifting and reinforcing rafters. The building is structurally sound and the goal of restoration is to make it a museum illustrating the industrial heritage of the Musconetcong.

One of the goals of the workshop was the documentation of the rare water turbine that powered the mill. Despite sending several participants through the mill race and descending to the lowest levels of the structure from inside, safe access was not possible. Participants then ventured into the cool water of the Musconetcong looking for artifacts. Several large pieces of mill stone were found and some of the archaeologists wanna-bes and puzzle masters in the group tried to piece them all together.

The fieldstone building is in need of major repointing work. Sections have in the past been stuccoed over with Portland cement. All that incompatible material will need to be removed. Fortunately, there are also large sections of original stucco in very good condition. Various options were discussed regarding overall building treatment, including leaving all the original sound stucco, removing the deteriorated stucco and Portland cement, cleaning and repointing all the exposed stone.

That work will take considerable effort, but the HCN group, after learning how to mix the appropriate mortar, was able to clean and repoint a large section of the upper front gable. They also removed Portland cement from and repointed a section on the side wall. A large void in the second floor wall was filled, which was actually the flue for the chimney. This was done in order to prevent more water from coming in and damaging the masonry.

In order to learn more, the group visited two other mills, the meticulously restored and fully functioning Cooper Grist Mill in Chester and the Obadiah La Tourette Mill in Long Valley, which was the site of an HCN workshop in 2002.

Photos copyright Mark Slater, Jamie Donahoe

Asbury Grist Mill
"… We stopped by the Asbury Mill. The site has much potential! We look forward to following the progress."

Diann &
Steve Berry
Berry Preserve
Bed & Breakfast

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