The Standard Mill

The Standard Mill, also known as the Standard Consolidated Mining Company Mill, was a pivotal element in the history of Bodie, California. The building is one of the most iconic images or Bodie, and dominates the landscape. Located in the Bodie Hills east of the Sierra Nevada mountain range, this mill played a crucial role in the processing of ore from one of the richest gold-mining areas in the American West.

Formation of the Standard Company

The Standard Company was founded in 1877, quickly becoming one of the most prominent and productive mines in the Bodie District. The company consolidated several claims, thereby gaining control over a large portion of the mineral-rich land. The successful extraction and processing of gold ore by the Standard Company were instrumental in Bodie’s transformation from a small camp into a bustling mining town.

Construction and Operation of the Standard Mill

The Standard Mill was constructed in 1877 to process the ore extracted from the company’s mines. It employed the latest technology of the time, using a combination of steam power, gravity, and chemical processes to extract gold from the ore. The mill utilized the amalgamation process, which involved crushing the ore to a fine powder and then using mercury to separate the gold. This process was later supplemented with cyanidation, which allowed for the extraction of gold from low-grade ore, significantly improving recovery rates.

Looking up at the trestle bridge which is used to haul gold ore into the Standard Mill, Bodie, CA. Two large mortar boxes are visible in the foreground.
Photograph by James L Rathbun — Looking up at the trestle bridge which is used to haul gold ore into the Standard Mill, Bodie, CA. Two large mortar boxes are visible in the foreground. Photograph by James L Rathbun

Technical Details

Originally, as built, the mill is powered by large steam boilers. There boilers are fed using wood brought up to Bodie on the Bodie and Benton Railroad. The mill initially featured a 20-stamp system, but as operations expanded, it was upgraded to a 30-stamp system. Later, the mill is converted to Hydroelectric power from a plant built approximately thirteen miles from the town at Dynamo Pond.

Ore is loaded into the mill using one of two trestles. The primary trestle connects to the backside of the mill, and used to haul ore from the mines deep inside mines inside of the mountain. The secondary trestle is sloped to the north and is used to haul ore up sevens stories above the the loading room. From there, the ore is sorted with grizzly bars before being dropped into the powerful stamps.

The now quiet stamps of the Standard Mill in Blodie, CA could be heard from four miles away. Photograph by James L Rathbun

The stamps, which were heavy iron rods, repeatedly crushed the ore into a fine powder. This powder was then passed over mercury-coated copper plates, where the gold particles would adhere to the mercury. The amalgam of gold and mercury was then collected and heated to separate the gold from the mercury.

Economic Impact and Contribution to Bodie’s Growth

The Standard Mill was the most significant factor in Bodie’s economic boom during the late 19th century. By 1879, Bodie’s population had swelled to approximately 10,000 people, with the Standard Company producing gold worth millions of dollars by today’s standards. The wealth generated by the mill attracted a diverse population, leading to the establishment of various businesses, schools, and a newspaper. During the height of operations, the stamps from the mill could be heard four miles away, and operated twenty-four hours per day, six days a week.

Ore entering into the the smelting room at the left in the form of 400lb ingots. Standard Mill, Bodie,

Challenges and Decline

All the mining and milling activities of the Standard Mining Co., came to their conclusion with the pouring of a bullion bar in the smelting room.

Despite its success, the Standard Mill faced numerous challenges, including harsh weather conditions, fires, and fluctuating gold prices. The mill experienced several fires, the most devastating occurring in 1898, which necessitated extensive rebuilding. Additionally, as the richest veins of ore were exhausted, the profitability of the mill declined. The Standard Company ceased operations in 1913, marking the end of Bodie’s major gold production.

Preservation and Historical Significance

Today, the Standard Mill stands as a testament to Bodie’s rich mining history. It is one of the best-preserved examples of a 19th-century mill in California. The site is now part of Bodie State Historic Park, established in 1962, which aims to preserve the town and educate the public about its historical significance. The mill’s machinery, structures, and surrounding buildings offer valuable insights into the technological advancements and industrial processes of the time.

The Hoover House served as housing for the Director of Operations of the Standard Mill in Bodie. Photography by James L Rathbun

Tours are available several times per day for a tickets price of $6 a person. The hour long takes you past the Hoover House up past the stream plant to the trestle, which fed ore up the the top of the mill. From there, the tour route enters the machinery room and power room before dropping into the slucing room and clean up rooms.

The Standard Mill was a cornerstone of the town’s mining industry and played a vital role in its economic development. Through its innovative use of technology and its contribution to gold production, the mill significantly influenced the growth and prosperity of Bodie during its peak years. Today, it remains an important historical site, providing a window into the challenges and achievements of the mining era in the American West.