Army Corps Looking for 100 Million Cu Yd of Clay
Press Releases
IPET Risk Maps Released in June for New Orleans Are CORRECT
Vicksburg, Miss. – The Interagency Performance Evaluation Task Force (IPET) reaffirmed today that the New Orleans-area risk maps released on June 20, 2007, are correct. A data error discovered in the draft technical supporting documentation released by IPET on Nov. 7 raised questions about risk map accuracy for two sections of New Orleans.
Geologic Hazards
Corps Delivers 100-year Protection Plan for New Orleans
The US Army Corps has issued conceptual plans with elevations for proposed improvements to New Orleans flod protection system. Levees, floodwalls and closure structures will be designed for a 100-year storm surge. Achieving the conceptual […]
Project Related
Deleware Forced to Redesign Unfinished Bridge Because of Consolidation Issues
[Update 2/10/08] Updated the name of the bridge. [/Update]
DelDOT is putting the new Indian River Bridge over out to bid. The current bridge is said to be in danger of failing between 2008 and 2012 according to the Army Corps of Engineers, seems to be related to scour. From what I hear, the tidal currents at that inlet being spanned over are tremendous, with water velocities on the order of 35 mph.
In 2005, Mactec, a geotechnical firm, provided a geotechnical report and associated recommendations to DelDOT for how to construct the 45-ft high approach embankments for a 1,400-ft long bridge in light of a 60-ft clay layer (sounds like pre-loading). However, the embankments are not settling as Mactec predicted (not sure if its more or less, probably less meaning slower) and are "shifting laterally" (squeezing?) so the DOT is going with a longer bridge to span the problem soil. More after the break.