1. US Army Corps of Engineers BUILDING STRONG ® Ft Leonard Wood Area Office Ft Leonard Wood Area Office Water Tower Lift 18 September 2015 Dale Bleckman Resident Engineer North Resident Office

2. 2 BUILDING STRONG ® Agenda The Water Tower Extension What happened Options Considered The Lift Architect-Engineer Liability Questions

3. 3 BUILDING STRONG ® What Happened 500,000 gallon water tower near vet clinic finished in late 2014 After completion it was determined that water pressure was about 14 psi too low. Research indicated that the tower was designed 33.8 feet low Error was due to surveyor software glitch Architect-Engineer accepted responsibility for the design error

4. 4 BUILDING STRONG ® Options Considered Use pump  Additional maintenance  Additional cost Raise the tower 33.8 feet  Use a jacking system  Use cranes

5. 5 BUILDING STRONG ® The Lift Water Tower weighed approx 225,000 pounds Three cranes used (550 ton, 450 ton, 210 ton) and 150’ man lift 13 tractor trailers required to move one of the big cranes – over 500,000 pounds of counterweights New 33.8 foot, 53,000 pound section added to extend tower from 122’ to 156’ Prep for lift started at 0530 hrs, 18 Sep 2015; tank was standing on its own by 1730 hrs same day Weather was one of the main controlling factor

6. 6 BUILDING STRONG ® THE LIFT

7. 7 BUILDING STRONG ® Architect Engineer Liability Design error was due to software glitch with surveyor’s program Designer accepted responsibility and re-designed tower Designer is responsible for re-construction cost but is not responsible for the additional 33.8 foot section Re-construction costs paid from project $s; AE Liability $s, if any, will go to US Treasury

8. 8 BUILDING STRONG ® Questions