The design implementation approach for pile dike repairs was revised to allow for focused, cost-effective repairs to select sections of individual structures (rather than repair/enhancement of entire pile dike lengths at all the Cottonwood Island pile dikes). Repair areas are limited to sections of pile dikes that have experienced loss of all or the majority of visible piles to the extent that hydraulic function is assumed to be severely compromised. This change in design and execution approach allows for cost effective repair of only those areas where hydraulic function has been severely compromised, easily accommodates expansion of repair areas and future repairs, and allows easy adjustment of the design based on future inspection and monitoring of function.
