Tenders Are Invited For Miscellaneous Engineering Services – Study And Project Management Mission For The Security Work On The Raw Water Supply Pipe Of The Serm, Dn 900 Pipe Between Arnaville And Corny-Sur-Moselle (54, 57)

Miscellaneous Engineering Services – Study And Project Management Mission For The Security Work On The Raw Water Supply Pipe Of The Serm, Dn 900 Pipe Between Arnaville And Corny-Sur-Moselle (54, 57). The Conveyance Pipe Between The Arnaville Dam And The Moulins-Lès-Metz Treatment Plant Was Laid In The Early 1970S, And Should Make It Possible To Supply Raw Water To The Moulins-Lès-Metz Plant With A Capacity Of 90,000 M3/D. This Pipe, Almost 14.5 Km Long, Is Made Up Of A First Section Of Welded Steel Of 3,100 Ml, Then Of A Section Of 8,500 Ml Of Cast Iron Express Joint And Finally Of 2,800 Ml Of Prestressed Concrete Pipe. Along Its Route, It Crosses Several “Sensitive” Areas (Moselle, Old Gravel Pits, Jouy Canal, A31, Etc.). The Most Sensitive Area Is That Of The Subsidence Zone In Corny-Sur-Moselle, With A Significant Impact In The Event Of A Landslide: Difficulty Of Access And Significant Length Potentially Impacted (Around 800 Ml). Studies Have Already Been Carried Out And Have Not Been Successful For Various Reasons, Including Land And Financial Issues. Taking Into Account The Above Elements, The Water Union Of The Messina Region Wishes To Carry Out A Project Study On A New Route Making It Possible To Integrate And Treat At Least Two Sensitive Zones: Subsidence Zone In Corny-Sur-Moselle And Underground Crossing Of The Moselle In Arnaville. The Project Must Integrate The Following Elements: - Remove Major Risks On The Route Of The New Pipeline (Subsidence At Corny-Sur-Moselle And Crossing Of The Moselle Dating From The 1970S); - The New Water Transport Device Must Have The Same Transfer Capacities As Those Of The Existing Pipe. The Conveyance Pipes, Old And New Routes, Will Be Preserved To Maintain Emergency Conveyance