M & M Lime Co Inc 215 Nichola Rd, Worthington, PA 16262 ... Providing State-approved Limestone Since 1958. General Info 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.