Passage: For over 600 years (at least 1129-1729), the nearest Thames bridge to London Bridge was at Kingston. From late Tudor times congestion in trading hours at London Bridge (for road goods and carriages from Kent, Essex, much of Surrey, Middlesex and beyond) often amounted to more than an hour. A bridge at Westminster was proposed in 1664, but opposed by the Corporation of London and the watermen. Further opposition held sway in 1722.  However an intervening bridge (albeit in timber) was built at Putney in 1729 and the scheme received parliamentary approval in 1736. Financed by private capital, lotteries and grants, Westminster Bridge was built between 1739–1750, under the supervision of the Swiss engineer Charles Labelye. The bridge opened on 18 November 1750.The City of London responded to Westminster Bridge and the population growth by removing the buildings on London Bridge and widening it in 1760–63. With Putney Bridge, the bridge paved the way for four others within three decades: Blackfriars Bridge (1769, built by the City),  Kew Bridge (1759), Battersea Bridge (1773), and Richmond Bridge (1777) by which date roads and vehicles were improved and fewer regular goods transported by water.

Question: During the 30 year time-span, which bridge was built first?
Kew Bridge