Prince George’s County, Maryland is working with its advisors URS, Williams & Mullen and Barclays Capital to finalize terms of an agreement with Corvais Solutions to retrofit “green infrastructure” on widely dispersed urban stormwater runoff problem points there.

In a January 10 press release, the US Environmental Protection Agency (EPA) estimated the value of the contract at $100 million during a three-year demonstration phase on public right-of-way and $1.2 billion through 2025 on 15,000 sites countywide. Stormwater impact fees assessed per impervious acre will fund the county retrofit program and the long-term maintenance of the runoff remediation sites.