If you want to do public work, your only shot is to get a DBE/WBE/CSB status... Prime contractors (at least in this region) on public work almost always look to Erosion Control to meet quota. As far as marketing, my experience is cold calling, get to know compliance officials in your area and get on their mind so when they red tag a site and the contractor needs help they can offer them a place to start, plan rooms, job trailers, salesmen from local rental companies, signs on your installations once you get going. Do some research, make contact with desirable suppliers and put together a catalogue of products/services you offer, then start calling on design engineers to push your pet products in their design of upcoming projects. Listen to the problems the contractors you talk to express and figure out how you can be their solution. KEEP YOUR OVERHEAD LOW! The largest problem I have identified with this business is that much of the work is labor intensive, but contractors demand high production IE:I just got topsoil on 5 acres of 2:1 slopes and its supposed to rain tomorrow so I need them matted this afternoon... Don't pander to that type of poor planning or that will become what is expected of you and the payroll involved with keeping enough people to satisfy that type of demand will eat your lunch on the days when you don't have 5 acres of matting to roll. There is also a lot of room for innovation in the BMP market as it is relatively young, so break out the crayons and do something tricky!