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- William BaldwinJohnston, RI
- William E FredericksonNorth Scituate, RI
- William E RonciNorth Kingstown, RI
- William G SilviaPortsmouth, RI
- William J WilburWarwick, RI
- William J. Ross Inc.East Greenwich, RI
- William Wright Jr.West Greenwich, RI
- Williams Excavating LlcPascoag, RI
- Wolfe Construction And ExcavationJamestown, RI
- Wood River IndustriesCharlestown, RI
- Wrni Foundation Dba = WxniNorth Providence, RI