Features
Old meets new: Custom fabrication
A pair of crushers are repositioned with a heavy-duty screen in a custom-fabrication job that’s providing productivity and portability. Keith Hagedorn had a unique set of characteristics in mind as he pursued a new screen for his contract-crushing company last… Keep Reading
Full-on frac sand
With a complete, easy-to-use, automated frac sand processing system, a Wisconsin producer keeps material flowing. In Wisconsin, press reports have called frac sand the “new gold rush,” because of its critical importance in the process that uses hydraulic fracturing –… Keep Reading
Reduction ratios of cage mills
Cage mills have a high ratio of size reduction after a single pass through the cages. One of the most versatile size reduction machines and one of the hardest working is the cage mill. There are several kinds of cage… Keep Reading
Kids rock: Quarry education
Dolese mines goodwill across Oklahoma by helping students make the connection between quarries and earth science. Kids and rocks are a great combination. Dolese, an Oklahoma aggregate producer, is doing its part to bring the two together. Across Oklahoma, Dolese… Keep Reading
Highwall concerns
A number of innovative solutions are available to address slope instability and rock-fall hazards. There are several geological hazards that are encountered during the life of a quarry or open pit mine. Most of these hazards are included in a… Keep Reading
Buy or lease?
New rules will have an impact on whether it’s better to buy or lease equipment for your operation. Even as credit becomes more readily available, whether to buy or lease is a question facing many crushed stone, sand and gravel… Keep Reading
Best practices: Washing & classifying
Industry expert John Bennington discusses washing and classifying techniques with Pit & Quarry. John Bennington, product manager at Superior Industries, led an educational session on the basics and misconceptions of washing and classifying at the 2015 AGG1 Aggregates Academy &… Keep Reading
MSHA or OSHA?
Intense federal regulation of workplace safety and health began when Congress introduced civil penalties for mines with the Federal Coal Mine Health and Safety Act of 1969, and for other employers with the Occupational Safety and Health Act of 1970.… Keep Reading
Working class traditions
One family contributes four generations of workers to the Bluegrass Materials Texas Quarry in Maryland. About half a dozen companies have owned the Texas Quarry in Cockeysville, Md., over the past 50 years, yet one name stayed consistent during that… Keep Reading
