Lafarge, the largest supplier of cement products in the U.S. and Canada, is working with Treviicos Corporation, an internationally known geotechnical and foundation contractor, to help improve the Tuttle Creek Dam on the Big Blue River near Manhattan, KS, so it can withstand a magnitude 6.6 earthquake. U.S. Army Corps of Engineers regulations state that all dams "are required to survive and remain safe during and following the maximum credible earthquake event," which is defined as a 6.6-magnitude quake in Kansas.

As the word's largest foundation stabilization project on an operational dam, the multi-year structural modification work involves jet grouting, deep soil mixing, and introducing cement into foundation sands. Lafarge worked closely with Treviicos to test various combinations of portland and slag cements to meet specifications requiring a minimum strength of 170 psi over an area 6,000 feet long to a depth of more than 200 feet.

Based on test results and an inspection of Lafarge's local state-of-the-art manufacturing and distribution capabilities, it was determined that Lafarge MaxCem brand blended cement would be the most reliable solution for this dam safety-assurance project, the largest ever undertaken by the Army Corps of Engineers. Suitable for use in virtually all concrete applications, Lafarge MaxCem is an engineered blend of slag and portland cements that provides enhanced strength, durability, workability, and placeability characteristics. Its use also provides a significant contribution to sustainable construction.

Built in 1963, Tuttle Creek Dam is a 1.5-mile-long rolled-earth and rockfill structure nine miles upstream from the confluence of the Blue and Kansas Rivers and 125 miles west of Kansas City, MO. The seismic stabilization project, scheduled for completion in September 2010, will require 75,000 tons of the 50/50 MaxCem blended cement.