Where to find the exact trail where Nikola Tesla proved his “impossible” theory in Colorado

Tesla and Westinghouse’s Revolutionary Ames Power Plant Experiment

In 1890, mining boss L.L. Nunn faced ruin. His Gold King Mine near Telluride had no more trees to burn, and coal cost too much to haul by mule.

So Nunn, a smart Harvard man, called George Westinghouse about Nikola Tesla’s new AC power ideas. They soon built a system that used the San Miguel River’s steep drop to make power.

On June 19, 1891, their Ames Power Plant sent electricity 2. 6 miles across rough mountains to the mine.

The setup ran for 30 straight days, proving AC power could travel far.

The Telluride Historic District still shows how this small Colorado town changed the world’s power grid forever.

Coal Costs Nearly Bankrupted a Colorado Gold Mine

By 1890, L.L. Nunn was going broke at his Gold King Mine near Telluride. The forests around the mine were gone, used up as fuel for mining.

Coal brought in by mules cost $40-50 per ton, making gold mining barely worth it. Nunn, who left his Harvard law career to try mining, needed a way out of this mess.

He noticed the South Fork of the San Miguel River dropped 500 feet in less than a mile and flowed just 2.6 miles from his mine.

Tesla’s Patents Caught a Mining Man’s Attention

Nunn called George Westinghouse in 1890 about using a new electrical system. He wanted to try Nikola Tesla’s alternating current patents to get power from the nearby river.

Tesla had sold his AC motor and transformer designs to Westinghouse two years earlier for $60,000 plus royalties. Westinghouse saw Nunn’s problem as a perfect test for Tesla’s ideas.

No one had yet shown that high-voltage electricity could travel far without losing too much power.

Workers Built a Powerhouse Where Water Dropped Steeply

Work teams started building in 1890 at a key spot on the South Fork. They put in a 6-foot Pelton water wheel made for fast mountain streams.

This wheel linked to a 100-horsepower Westinghouse alternator making 3,000 volts at 133 hertz. The men built a wooden building to protect the electrical gear from harsh Colorado mountain weather.

Local miners watched with doubt as the strange equipment came by wagon.

Mountain Terrain Made Wire Installation a Challenge

Workers strung two bare copper wires across 2.6 miles of rough land between the plant and mine.

The whole transmission line cost just $700, much cheaper than one month of coal.

Work crews climbed steep hills, crossed rocky cliffs, and fought bad weather to put wooden poles in the tough ground. The exposed wires carried 3,000 volts with little safety protection.

Bears, lightning, and falling trees all threatened the fragile line connecting power to the gold mine.

Gold King Mine Got an Identical Motor Setup

At the mine, workers set up a matching Westinghouse alternator working as a motor. This motor ran the stamp mill that crushed gold ore, the part that used the most power.

The motor needed to match speed perfectly with the generator 2.6 miles away.

Engineers spent weeks balancing the system so the motor would run without constant fixing. Mine workers gathered around the new machine, many thinking electricity could never replace steam engines.

June 19th Marked a Turning Point in Electrical History

Water gates opened at the Ames Plant on June 19, 1891, sending power to Gold King Mine. The stamp mill motor started and began crushing ore, becoming the world’s first working AC power line.

Westinghouse engineers watched voltage and current readings day and night, ready to shut down if needed. Nunn saw his mining change from near-failure to making money again as water replaced coal.

The System Ran for a Month Without Stopping

Ames Plant ran non-stop for 30 days, showing AC power worked well for industry.

Only 5% of power was lost during transmission, much better than Edison’s direct current which didn’t work beyond one mile. The stamp mill crushed ore 24 hours a day, cutting costs and boosting Gold King Mine’s output.

Westinghouse staff wrote down everything about how it worked, creating useful information for future AC systems worldwide.

America Beat Germany in the Race for AC Power

Ames Plant beat Germany’s Lauffen-Frankfurt system by two full months.

The German test in August 1891 sent 15,000 volts across 110 miles but only ran an exhibition, not a real business.

Ames showed AC could run actual industrial equipment and make money, not just light bulbs at a fancy show.

The American success story led European engineers to use similar AC standards and backed up Westinghouse’s big bet on Tesla’s patents.

Telluride Lights Came On Thanks to Nunn’s Gamble

Nunn grew the Ames Plant after the mine’s success, bringing electricity to Telluride homes and shops. Telluride became the first American town with AC street lights and home electrical service.

Other mines across Colorado’s San Juan Mountains quickly copied the system, freeing themselves from coal.

The town changed from flickering gas lamps to steady electric lights almost overnight, surprising visitors who told others about the mountain town’s new technology.

Niagara Falls Power Project Followed Telluride’s Example

Westinghouse used data from Ames to win the contract for the huge Niagara Falls power project in 1895. The Niagara system would send 11,000 volts over 20 miles to Buffalo, using ideas proven at Telluride.

This contract ended the famous “War of Currents” between Edison’s direct current and Westinghouse’s alternating current systems. Nunn’s attempt to save his mine had changed the path of electrical growth in America.

A Small Plant Powered the World’s Electrical Revolution

Ames Plant kept running into the 1950s, eventually upgraded but using the same basic principles. By 1900, AC power became the worldwide standard for electrical systems based on the Telluride success story.

The plant received National Historic Landmark status and IEEE Milestone designation for its pivotal role in electrical history.

Tesla’s polyphase system tested at Ames now powers virtually every electrical grid on Earth, scaling from the original 100 horsepower to millions of megawatts.

The humble wooden powerhouse in a Colorado canyon launched the electrification of modern civilization.

Visiting Telluride Historic District, Colorado

The Telluride Historical Museum at 201 W. Gregory Avenue tells the story of Tesla and Westinghouse’s groundbreaking AC power system that started here in 1891.

Summer hours are Monday-Saturday 10am-5pm ($9 adults, $6 students/seniors), winter hours Tuesday-Saturday 10am-5pm.

You can also drive to the actual Ames Power Plant ruins on Ophir Road, where IEEE plaques mark this electrical milestone. The museum offers walking tours explaining how Telluride became America’s first AC-powered town.

This article was created with AI assistance and human editing.

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