by Angus M. Thuermer Jr., WyoFile

Thousands of acres southeast of Cheyenne owned by and associated with U.S. Sen. Cynthia Lummis lie in the path of Microsoft’s planned data center expansion, Laramie County property records show.

One of Microsoft’s existing data centers — a climate-controlled warehouse of computers, data storage and networks — sits southeast of Cheyenne on land the company purchased from the Lummis family in 2021. In April, the Seattle-area tech giant announced plans to buy 200 acres adjacent to its data center in the Bison Business Park and said it will purchase another 3,000 acres nearby.

Lummis, members of her family and companies associated with them own about 6,000 contiguous acres that almost surround the Microsoft center. Microsoft displayed a map Thursday at a Cheyenne community information session showing its 3,200-acre expansion extending into that Lummis family property.

Microsoft’s pending purchases land at the doorstep of one of tech’s biggest supporters in Congress. Lummis, known as the crypto queen of the Senate, has sponsored at least five significant cryptocurrency, artificial intelligence, blockchain, stablecoin and tech bills. Political action committees associated with her received $1.34 million, including from major cryptocurrency and tech interests, since Dec. 31, 2021 and July 2025, WyoFile and reporting partner the Sunlight Research Center have found.

Microsoft and members of Lummis family — the senator, her brother Doran and daughter Annaliese Wiederspahn — would not comment or agree to interviews about the development or their relationship to the project. The senator’s family has owned much of the expansion property for decades — some dating back to 1944 and before — and has a long history of ranching, real estate transactions and business operations in and around Cheyenne.

Wiederspahn is a board member of Cheyenne LEADS, a corporation dedicated to area economic development, including data centers.

Microsoft’s land-buy announcement comes as Cheyenne is quickly becoming a data-center hub — the city is weighing proposals for 40 to 70 new data centers, according to some estimates — amid questions among area residents about water and energy usage, plus sweeping changes to the landscape. Those concerns prompted the Cheyenne City Council to consider a moratorium on new data centers, but local officials ultimately voted against such a measure.

Lummis has heard those queries, she wrote in a September op-ed.

“During my travels across Wyoming, countless folks have approached me about AI and the data centers coming to our state,” she wrote. “I tell them the truth: If we don’t power America’s AI with Wyoming energy, China will build their AI dominance on their coal instead.”

Abundant energy and land

Data centers are large, climate-controlled warehouses that contain computers, data storage and networks — used by Microsoft to establish and maintain the Microsoft Cloud, where data is kept. “[Y]ou can store your photos, play Xbox games, video call with your family, and work on documents from anywhere and on any device, without needing a powerful computer,” the company explains.

While some data centers focus on storage, others focus on providing the computing power to operate artificial intelligence. Those servers can also be used for bitcoin mining. 

Wyoming’s coal and potential nuclear power generation are a plus for energy-hungry data centers and AI, Lummis has stated. Wyoming’s cool climate and lack of corporate business tax also fuel data center development near Cheyenne. The state’s open land is another plus for data center development — and Lummis and her family own a lot of it.

Microsoft established its existing data center southeast of Cheyenne on 249 acres of Lummis-family land in the Bison Business Park in 2021, a subdivision created through a fast-track planning process. Arp and Hammond Hardware Co., whose president is Lummis’ brother Doran Lummis, carved out an adjacent 200-acre parcel in April 2025, a year before the tech company announced its intent to expand there.

Beyond that, Lummis’ family owns almost all the surrounding land — about 6,000 acres of it — including property mapped for purchase by Microsoft and displayed at Thursday’s open house in Cheyenne. The sprawling holdings, most of which are unirrigated rangeland, are owned by Lummis family companies Arp and Hammond, Lummis Livestock Co., Old Horse Pasture Inc. and Sweetgrass Land Co., Laramie County property records show.

The expansion, Microsoft said in an April statement, will be “strengthening Southeast Wyoming’s role as a growing hub for technology-driven economic activity, innovation and job creation.”

Crypto Queen

Lummis, elected to the Wyoming House of Representatives in 1979 at 24, was the youngest woman to serve in the Legislature. Voters then elected her to the state Senate, Wyoming treasurer and, in 2008, as Wyoming’s lone U.S. representative. She won election to the Senate in 2020, defeating Democrat Merav Ben-David with 73% of the vote.

Lummis announced in December she won’t seek reelection this year.

While in the Senate, Lummis has advocated for and sponsored legislation boosting cryptocurrencies — virtual money like bitcoin and stablecoins — and supported technology innovators, artificial intelligence and blockchain.

In 2021, “I founded the Financial Innovation Caucus to educate my fellow senators about the vast potential of emerging technologies to promote financial inclusion and build new wealth for all,” she said in a statement that year.

In December 2022, she placed her shares of Microsoft (valued between $15,000-$50,000) and bitcoin (valued between $50,000-$100,000) in a blind trust “to avoid any conflict of interest or appearance of any such conflict.”

Details about the land sale, including the price, have not been publicly disclosed.

This article was originally published by WyoFile and is republished here with permission. WyoFile is an independent nonprofit news organization focused on Wyoming people, places and policy.

Related

Inside a charred book, pages dotted in soot stains tell the story of how San Francisco rose to the epicenter of a gold rush. Barely escaping the 1906 earthquake, this book should’ve burned completely.

The city’s oldest continually operating library presumed it did. After all, almost 200,000 volumes inside the Mechanics’ Institute did. That was until Randall Schwed donated the book to the library in December. Fumbling around an online marketplace, Schwed found “Echoes of the Foot-Hills” listed for $35.

“What’s interesting about this book is that it’s a survivor,” Schwed told CNN. “I needed to send it home.”

Fires heavily damaged the city during the 1906 earthquake and other fires followed. While no one knows which fire the book survived, here’s what we know about the mystery around it.

Library Manager Myles Cooper has been racking his brain for an explanation of how the book found its way home. In a fire after the earthquake that destroyed 200,000 volumes, how could this book emerge more than a century later?

Was it checked out? Was it rescued from the rubble of another fire? Was it hidden somewhere?

Cooper is certain the book is from the institute in San Francisco, evident by a stamp and a date: Dec. 10, 1874. Schwed, a collector, said his first instinct was to research the owner.

Agnes Quigley is inked at the top of the book’s first page.
In 1898, a woman by the name Agnes Quigley posted an advertisement in the San Francisco Call and Post newspaper, Schwed said.

The advertisement is about a young woman and reads, “From East, wishes situation as chambermaid and carer of children.”

There’s no way to prove whether the two Quigleys are the same person, Schwed said. But he has two theories as to how Quigley could have gotten hold of the book. She could have checked the book out. Or Quigley somehow stumbled upon the charred book and inscribed her name inside.

Both theories are plausible, Cooper agreed. He added another theory: There was a “lot of looting in San Francisco during the 1906 earthquake.”

“Echoes of the Foot-Hills” isn’t the sole survivor, though. Other volumes, like archival and reference materials, were in a safe at another location during the earthquake, Cooper said. Another book, “Marriages, Rights, Customs and Ceremonies,” survived and was in circulation until 2001.

Now, the soot-spotted book is unavailable for checkout. It is locked in a display case beneath an 1854 map of San Francisco that also survived the earthquake. Nearby, an oversize atlas bears drawings of the earthquake’s activity created by pendulums.

“It’s really kind of like a library fantasy,” Cooper said. “It’s really magical.”

In San Francisco’s Financial District, the Mechanics’ Institute stands two stories tall. The membership organization is home to the nation’s longest-running chess club, writers’ groups and classes.

In the 1850s, the institute was established to provide gold miners with an education. Decades later, in January 1906, the institute merged with the Mercantile Library to form what was the city’s largest library. Three months later, the Institute lost that title.

“Our library was destroyed in ways that many other buildings were not. I mean, it completely fell down,” Cooper said. “There’s only one remaining wall and really only one brick story left, and everything was burned.”

The institute, like San Francisco, began discussing a plan to rebuild, Cooper said. They collected thousands of dollars and books in donations. Many of those books are related to architecture, mining and railroads – the things San Francisco needed to rebuild.

“It’s definitely part of the DNA of San Francisco to rebuild and rethink things, and that we always have a place to save history, and people’s stories won’t be lost,” Cooper said. “We will be a place that can have the capacity to contain those stories.”

As a longtime San Franciscan, Cooper said the earthquake’s story is kept alive through word-of-mouth. Today, no witnesses of the earthquake and fire are alive.

The institute plans to put acid-free cardstock inside the book to explain its story. It’s common practice for an owner to write their name inside an old book. “Echoes of the Foot-Hills” has had three owners in its more than 150-year lifespan: Quigley, Schwed and the institute.