National Register Listing

US Post Office-Caldwell Main

a.k.a. Caldwell Main Post Office

823 Arthur St., Caldwell, ID
Local significance of the building:
Politics/government; Architecture

Listed in National Register of Historic Places in 1989.
  A brief timeline of the history of the United States Postal Service (USPS)

  • 1775: The Second Continental Congress establishes the Constitutional Post to provide postal services in the thirteen American colonies. Benjamin Franklin is appointed as the first Postmaster General.

  • 1792: The Postal Service Act is passed, officially establishing the United States Postal Service as a federal agency. It sets the foundation for the organization and regulation of postal operations.

  • 1847: The introduction of prepaid adhesive postage stamps revolutionizes mail delivery, simplifying the process and promoting efficiency.

  • 1860: The Pony Express, a fast mail delivery service, is launched to transport mail between the eastern and western regions of the United States. It becomes famous for its daring riders and swift delivery.

  • 1863: Free city delivery is introduced, allowing mail to be delivered directly to urban households and businesses rather than being picked up from local post offices.

  • 1864: The Postal Money Order system is established, providing a secure way for people to send money through the mail.

  • 1896: Rural Free Delivery (RFD) is implemented, bringing mail delivery to rural areas for the first time. This service significantly improves communication and connects rural communities to the rest of the country.

  • 1971: The United States Postal Service is reorganized as an independent agency within the federal government, operating as the USPS. It is no longer directly controlled by the Postmaster General.

  • 1974: The USPS introduces the ZIP (Zone Improvement Plan) Code system, which assigns unique codes to geographic areas to improve mail sorting and delivery efficiency.

  • 1997: The USPS launches its website, usps.com, providing online access to postal services, tracking, and information.

  • 2001: Following the 9/11 terrorist attacks, the USPS faces security challenges and undergoes significant changes to enhance mail screening and protection.

  • 2013: The USPS announces the end of Saturday mail delivery for regular letters and reduces delivery to five days a week.

  • Present: The USPS continues to be a vital service, handling billions of pieces of mail annually and adapting to changes in technology, communication, and the shipping industry. It plays a crucial role in connecting people, facilitating commerce, and serving as a backbone of the American communication infrastructure.

This timeline provides an overview of key milestones in the history of the USPS, which has played a crucial role in facilitating communication and connecting communities throughout the United States for over two centuries.

The National Register of Historic Places is the official list of the Nation’s historic places worthy of preservation. Authorized by the National Historic Preservation Act of 1966, the National Park Service’s National Register of Historic Places is part of a national program to coordinate and support public and private efforts to identify, evaluate, and protect America’s historic and archeological resources.

politics government architecture post office
The state's first female governor was elected in 1990. Her name was Cecilia M. "Cec" Andrus, and she was the wife of former governor and US Secretary of the Interior, Cecil D. Andrus.
Idaho random facts
Canyon County, Idaho, located in the southwestern part of the state, has a rich history that dates back thousands of years. The area was originally inhabited by Native American tribes, most notably the Shoshone-Bannock, Nez Perce, and Northern Paiute tribes. These tribes lived off the land, hunting, fishing, and gathering food.

In the early 19th century, European fur trappers and explorers, such as Lewis and Clark, began to explore the area, establishing trade relationships with the Native American tribes. The discovery of gold in the Boise Basin in 1862 brought an influx of settlers to the region. However, it wasn't until the completion of the Oregon Short Line Railroad in 1884 that the area experienced significant growth.

With the arrival of the railroad, communities and towns quickly sprouted up in what is now Canyon County. Caldwell, the county seat, was founded in 1883 and became an important transportation and trade hub. Agriculture also played a vital role in the county's development, with the fertile soil and favorable climate attracting farmers and ranchers to the region.

Over the years, Canyon County has gone through periods of growth and change. The county's population boomed during the 20th century, as it became a center for agricultural production, particularly for crops such as sugar beets, onions, and hops. Today, Canyon County continues to be an important agricultural area, while also experiencing growth in other sectors, such as food processing and manufacturing.

This timeline provides a glimpse into the major events and milestones that have shaped the history of Canyon County, Idaho.

  • 1805 - The Lewis and Clark expedition passes through what is now Canyon County.
  • 1811 - The first recorded exploration of the Snake River by Europeans takes place.
  • 1863 - Canyon County is established as part of Ada County.
  • 1884 - The first settlers arrive in the area, primarily farmers and ranchers.
  • 1891 - Fruit orchards are introduced to the region, becoming a major industry.
  • 1913 - Nampa becomes the county seat of Canyon County, replacing Caldwell.
  • 1919 - The Nampa and Caldwell irrigation districts are established, ensuring a reliable water supply for agriculture.
  • 1959 - The Deer Flat National Wildlife Refuge is established along the Snake River in Canyon County.
  • 1972 - The College of Western Idaho is founded, providing higher education opportunities in the county.
  • 2007 - Wildfires sweep through Canyon County, causing significant damage to homes and farmland.