by Craig McFarland, President/CEO, Pinal Partnership
Pinal County has a rich history filled with significant milestones since its establishment in 1875. Here are a few key events and developments shaping the county over the past 150 years:
Establishment of Pinal County (1875)
- Formed Feb. 1 from parts of Maricopa and Pima counties, it was named after the Pinal Mountains in the southern part of the county.
- The early economy was largely agricultural, with mining playing a key role.
Mining Boom (late 1800s-early 1900s)
- Copper mining became a significant industry, especially in areas like Superior and Ray, where copper deposits were abundant. The mining industry helped fuel economic growth.
- The Magma Copper Mine, near Superior, was one of the largest and most important mines in Arizona.
- Today we have four active copper mines in Pinal County: Resolution Copper, Florence Copper, Cactus Copper Mine and Santa Cruz Copper.
Railroad Expansion (late 1800s)
- The arrival of the Southern Pacific Railroad in the late 1800s boosted trade and transportation. This was critical to growth for towns like Casa Grande and Eloy, key hubs for agriculture and commerce (especially mining supplies).
Agriculture and Irrigation Projects (early 1900s)
- Agriculture became the dominant industry by the early 20th century, with cotton, alfalfa and citrus being major crops. Irrigation systems supported farming in the area still known for its agricultural output.
- The Arizona Canal, completed in 1920, provided water for farming and ranching, fueling population growth.
Growth of Suburban Development (late 20th century)
- In the 1970s and 1980s, the county began to see increased suburban development, particularly as sought more affordable housing. This trend continued into the 21st century, with towns like Casa Grande, Coolidge and Eloy seeing significant population growth.
Economic Diversification and Infrastructure (2000s-present)
- The county has focused on diversifying, with growth in manufacturing, retail and renewable energy. The expansion of the Interstate 10 and Interstate 8 has made Pinal County more accessible.
- Solar energy farms have made the county a leader in renewable energy within Arizona.
Population Boom and Regional Challenges (2000s-present)
- The cities of Maricopa and Casa Grande and the county areas of San Tan Valley have seen significant growth.
- This growth has presented both opportunities and challenges related to infrastructure, education and services.
These milestones represent just a fraction of the county’s complex history, but they highlight the themes of growth, adaptation and resilience. Happy Birthday!
