Description of the applicationParis has inaugurated in 2009 Europe’s largest underground stormwater storage tunnel to date, with a 1.86km long 30m deep tunnel of 6.80m diameter and a total capacity of 80,000m3. Total investment was € 109 M for this tunnel, however the total stormwater management master plan cost could exceed € 4 B.
Flood management measure
Responsible authority level
Last modified: Sept. 13, 2016, 3:52 a.m.