Union Gas Spectra Energy Donates To Ltvcaunion Gasspectra Energy Company Donates To Ltvca[ Details ]Lower Thames Valley Conservation Authorityltvca Is One Of The 36 Conservation Authorities In Ontario. It Has Jurisdiction Over Watersheds Of All Streams Draining Into The Thames River From Delaware To Lake St. Clair. The Southern Boundary Includes The Watersheds Of Streams Draining Into Lake Erie, From The Talbot Creek Watershed In The East, To The Two Creeks Watershed In The West. more... See more text