Huntsville, Ala.-based ADS, a water, wastewater and hydroelectric services provider, has acquired Fort Washington, Pa.-based Severn Trent Pipeline Services, a water system analysis and rehabilitation company.
Cynthiana, Ky.-based refuse truck manufacturer E-Z Pack Holdings has acquired the assets, including most of the employees and facilities, of locally based Clean Earth Kentucky.
Muscatine, Iowa-based Stanley Consultants has acquired Austin, Texas-based Interstate Surveying.
RBF Consulting and Hirsch & Co., both San Diego-based planning and design firms, have merged.
Cambridge, Mass.-based CDM, an engineering firm, has acquired New Albany, Ind.-based wastewater firm A.W. Goodman & Assoc.
Anniston, Ala.-based North American Bus Industries has acquired Wichita, Kan.-based Optima Bus Corp.
Chattanooga, Tenn.-based Heil Environmental, a refuse company, has sold its Heil Truck Equipment Group and Heil South distributorship to Eden Prairie, Minn.-based Truck Bodies and Equipment International.