Groveland in Tuolumne County, California — The American West (Pacific Coastal)
Arrastra
Photographed By Barry Swackhamer, March 2, 2012
1. Arrastra Marker
Inscription.
Arrastra. . The Spanish first introduced the arrastra to the New World in the 1500’s. The work “arrastra” come from the Spanish word “arrastre”, meaning to drag along the ground. When ore was quarried out of the hard rock mines, the quartz had to be crushed to free the gold. The arrastra was the earliest and simplest device introduced into the remote areas of the California Gold Fields to do this operation., The simplest form of the arrastra was a flat-bottomed drag stone place in a circular, rock-lined pit and connected to a center post by a long arm. With a horse, mule or person provided power at the other end of the arm, the stone dragged slowly around in a circle., Ore place between the stone floor and drag stone was crushed into a coarse powder after which water and quicksilver were added. The resulting slurry was removed to sluices (troughs) were the gold was recovered., Thanks to the efforts of the Stanislaus National Forest Groveland Ranger District, the title to the drag stone and all of the floor stones of this arrastra was transferred to the Groveland Yosemite Gateway Museum. It has been reconstructed by local volunteers.
The Spanish first introduced the arrastra to the New World in the 1500’s. The work “arrastra” come from the Spanish word “arrastre”, meaning to drag along the ground. When ore was quarried out of the hard rock mines, the quartz had to be crushed to free the gold. The arrastra was the earliest and simplest device introduced into the remote areas of the California Gold Fields to do this operation.
The simplest form of the arrastra was a flat-bottomed drag stone place in a circular, rock-lined pit and connected to a center post by a long arm. With a horse, mule or person provided power at the other end of the arm, the stone dragged slowly around in a circle.
Ore place between the stone floor and drag stone was crushed into a coarse powder after which water and quicksilver were added. The resulting slurry was removed to sluices (troughs) were the gold was recovered.
Thanks to the efforts of the Stanislaus National Forest Groveland Ranger District, the title to the drag stone and all of the floor stones of this arrastra was transferred to the Groveland Yosemite Gateway Museum. It has been reconstructed by local volunteers.
37° 50.388′ N, 120° 13.568′ W. Marker is in Groveland, California, in Tuolumne County. Marker is on Main Street (State Highway 120), on the right when traveling west. This marker is located near the Groveland Library/Museum. Touch for map. Marker is at or near this postal address: 18990 Main Street, Groveland CA 95321, United States of America. Touch for directions.
Credits. This page was last revised on June 16, 2016. It was originally submitted on March 7, 2012, by Barry Swackhamer of Brentwood, California. This page has been viewed 616 times since then and 21 times this year. Photos:1, 2. submitted on March 7, 2012, by Barry Swackhamer of Brentwood, California. • Syd Whittle was the editor who published this page.
