One of Elk Grove's oldest businesses, continuously operated by the same family, is the J.M. Derr Lumber Company. Carole Crump gives us some insight into the business and its founder J.M. Derr, Carole's grandfather.

In January 1977, Mrs. Elizabeth Pinkerton's Joseph Kerr Middle School class interviewed Mr. Bud Jones, then the owner of the Elk Grove Water Works. Forty years later, the Linda Mae Mahon Lema Foundation had the honor of preserving the recording and the opportunity to create new audio casts from the original works. In this episode, Mr. Jones discusses the history and operation of the Water Works from its inception to the date of the interview.

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In the summer of 2018, Joseph Parades and Jeremiah Sheckler spent time with the Linda Mae Mahon Lema Foundation relating the story of hops in brew-making and the over 100-year history of hops being grown along the Cosumnes River Valley.

In May 2016, George Beitzel shared several stories of the Cosumnes River Valley. In this episode, he discusses hop farming along the Cosumnes River.

In September 2018, the Linda Mae Mahon Lema Foundation captured the presentation of Tom Mahonto at the Elk Grove Chamber of Commerce when Tom told the story and history of his family's Ranch and of growing hops along the Cosumnes River Valley from the 1880s to today. In his presentation, Tom describes how in 1882, his Great Grandfather, John Mahon, began growing, harvesting, and drying hops for market along the Cosumnes River. As he tells the story, Tom paints a very vivid picture of what the Mahon Ranch was like from the earliest of times through the 20th century.

In 1977 prominent Elk Grove citizen, Bud Jones, discussed with local students the origins in Elk Grove of what was once the largest pistachio orchard in the country. He also related, in great detail, the history of grape growing and wineries in the area, which dates back to the 1880s. This recording is part of the Elizabeth Pinkerton Collection and, through the Foundation, is being made public for the first time.

In an April 2016 interview, Mrs. Ellen Rosa described her remembrances of the Sheldon Grist Mill built in 1846-47 by her great grandfather Jared Sheldon. The grist mill was one of three water-driven flour mills that Sheldon built in California and was an important part of the economy of the area for many years.

In May 2016, George Beitzel shared several stories of the Cosumnes River Valley. In this episode, he discusses Reclamation District 800 and the discovery in the river of remnants of the Sheldon Grist Mill, which was built by Jared Sheldon in 1846-47.