Maryland Department of Transportation State highway Administration (MDOT SHA) manages a standard specification for both a Topsoil and Bio-Retention Soil Mix. Producers must be pre-qualified via annual testing to be on the eligible supplier list.
Construction Materials
Maryland Department of Environment: MDE B.4.1 Bio-Retention Filter Media is designed to meet the Maryland Stormwater Design Manual, Appendix B.4.1, MDE B.4.1 Bio-Retention Filtering Media
DOT Grade Topsoil is specifically produced to meet Department of Transportation “DOT” specifications for topsoil. Screened between a 0.50 and 1.25-inch minus, this heavier courser grade soil is our most economical offering and can be produced in large quantities year-round.
We provide many types of mulch, including Triple Ground Aged Natural Hardwood, Black, Brown, and Red Dyed, Playground Certified, Aged Pine Bark and Pine Bark Fines, Double Ground Natural Hardwood and Wood Chips. Mulches are shipped in either tri-axle or tractor trailers, depending on the service area.
