Although taxpayers and benefactors spent $69 million on London's infamous Garden Bridge, no concrete was ever poured nor any metalwork formed. Planned as a privately financed venture, the project failed to secure enough backing.

The final toll was just revealed by Transport for London (TfL), the city’s transit authority, which itself spent $31 million on the canceled River Thames crossing. The Dept. for Transport’s share was $24 million including a third of it to project owner the Garden Bridge Trust.

The project to build a plant-laden, privately financed bridge in central London collapsed in summer 2017 after London Mayor Sadiq Khan declined to underwrite long-term maintenance in case the trust were to fail. A huge amount of design and preconstruction work had been done in the previous four years.

这是当地设计师托马斯·希瑟威克（Thomas Heatherwick）和受欢迎的电视名人乔安娜·卢姆利（Joanna Lumley）的创意，他说服当时的马约尔·鲍里斯·约翰逊（Boris Johnson）和政府首席财政部长乔治·奥斯本（George Osborne）支持该计划。

TFL聘请了Arup Group在2013年开发设计，而Heatherwick被任命为副顾问。信托基金于2015年从TFL接管该项目后，它与意大利的Pordenone的Cimolai S.P.A.接管了巴黎的Travaux Publics S.A.

在获得所有必要的融资之前，该信托在2016年与Bouygues团队签署了固定价格，设计建造合同。总共，承包商获得了2700万美元的付款，其中包括650万美元用于建设前服务，另外270万美元用于关闭该公司。过早地投影。

为了充当水上的花园，伦敦市中心的大约368 m长的结构将在两个位置扩大到30 m。需要在其172 m的主跨度上支撑多达2 m的土壤，甲板深度将在码头上达到6 m。甲板顶部将用不锈钢板板板。它的侧面和大型凹槽混凝土墩将被封闭在杯状上。