M & M Lime Co Has been providing Limestone to Butler & surrounding Counties for over 52 years. All sizes of state-approved roadstone available. All stone is very clean, deep-mined limestone or washed gravel, tested by the PA Department of Transportation (PennDOT). WBE certified. Our products include: limestone, lime, gravel, crushed stone, coal, large ornamental rock and boulders. WBE Certified. SDBI certified Small and Diverse. Serving the construction and paving / asphalt industries in Armstrong , Allegheny , Butler, Indiana, Westmoreland, Clarion, Beaver, Venango, and Mercer counties for over 5 decades! Highest quality of stone / gravel aggregates with unmatched service. Open 7 am to 4:30 Mon - Fri Spring Summer and Fall. Half day Saturdays. Winter hours 8 am to 4:30 pm Mon thru Friday.