Riverdale Quarry, located in Riverdale, Morris County, NJ, supplies high-quality crushed and broken granite suitable for a wide range of construction and infrastructure projects. Strategically positioned near I-78 and I-287, this surface quarry, operated by Riverdale Quarry LLC under Roger & Gary Mahan, ensures efficient access to major transportation routes and regional markets. With 57 employees, Riverdale Quarry delivers consistent material supply and reliable service.
Operator
Riverdale Quarry LLC
Parent Company
Roger Mahan; Gary Mahan
Company Type
Other
101
Contact information not available for unclaimed listings.
Are you the owner? Claim this listingNeed materials from this quarry? Submit a quote request and we'll connect you.
40.998333, -74.307778
Data Source
Mine Safety and Health Administration (MSHA)
Last updated: 1/30/2026
I-78 E/US-22 E to US-202 S/US-206 S in Bridgewater Township. Take exit 29 from I-78 E. Follow US-206 S to Co Rd 601 in Montgomery, NJ
Construction Sand and GravelTake 222 S to 422 E to 76 E to 10 S to 322 E to NJ Parkway South. Take exit 25 and turn onto 9 S to 50 N. Turn left onto 610 W and follow to mine on right., NJ
Construction Sand and Gravel222 North to 78 East to 287 South, exit 29 towards 202/206. Go onto NJ-440 North & take State Street towards Perth Amboy. Merge onto State Street & take to mine site on right. GPS: N40 32.253 W074 15.681, NJ
Sand, Industrial NECRoute 222 North to I-78 East, Follow into New Jersey. Take exit 12 for Route 173. Left at end of ramp, through traffic light, turns into Frontage Road. Travel to mine entrance on right, after Quarry Stone Manufacturing. GPS: N40* 38.042; W074* 57.101, NJ
Crushed, Broken Slate