Gallery: Albert Frei & Sons’ Walstrum Quarry

By |  June 26, 2017

Pit & Quarry recently toured Albert Frei & Sons’ Walstrum Quarry, which is located west of the bustling Denver market in Idaho Springs, Colorado. The operation is positioned a bit farther from the market than its competitors, says President Al Frei Jr. But the company has created opportunities for itself to effectively compete in one of the nation’s markets that just keeps growing.

Check out some of the sights from our visit in the gallery below. Click photos to enlarge.

The Walstrum Quarry opened in 1981 in Idaho Springs, Colorado. The site now employs about 40 full-time workers.

Riprap and boulders represent about 15 percent of the operation’s revenue but only about 2 percent of its volume, President Al Frei Jr. says.

The operation utilizes two WA900 wheel loaders, four WA600 loaders and two PC490 excavators.

Albert Frei & Sons built its secondary plant in 2008 when the economy was crashing, but the decision to build then has paid off nicely for the operation, Frei says.

The operation, which is restricted to only so much space in the Rocky Mountains, has a centralized load-out area that’s adjacent to U.S. Route 6.

The view from atop the secondary plant shows three conveyors leading into the structure. Once inside, 8-ft. x 24-ft. four-deck screens from Deister and Nordberg HP500 cone crushers from Metso are key to further processing.

Kevin Yanik

About the Author:

Kevin Yanik is the editor-in-chief of Pit & Quarry magazine. Yanik can be reached at 216-706-3724 or

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