Complex sentence: Most streets formerly south of The Queensway east of the Mimico Creek were lost when the QEW was built however, along the waterfront a new street has been built on largely artificial shoreline named Marine Parade after a similar 1890s street planned to run along Mimico's shoreline.
Split into simpler sentences: Most streets formerly south of The Queensway east of the Mimico Creek were lost when the QEW was built. However, along the waterfront, a new street has been built on largely artificial shoreline named Marine Parade after a similar 1890s street planned to run along Mimico's shoreline.