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  • April

    Work continues on a water control structure replacement at the Culvert 11 site south of Port Mayaca. Jacksonville District plans to remove or replace 30 structures at Herbert Hoover Dike over the next five years.

    USACE begins Dam Safety Modification Study on Herbert Hoover Dike

    “The Dam Safety Modification Study is a comprehensive, system-wide study intended to identify risks in the system, and to recommend the necessary measures that can reduce the risk of failure,” said Tim Willadsen, HHD project manager. While certain sections of the dike have been studied before, HHD has never undergone a review this comprehensive and detailed. Each segment of the dike will be thoroughly reviewed for its geology and geometry, with particular attention given to scenarios that would cause the dike to fail.

  • March

    Everglades Day at the Arthur R. Marshall Loxahatchee National Wildlife Refuge brings many families and children like Sara Green to the Corps booth, where they spin the “Wayne Drop” wheel and learn about the Everglades and water safety.

    Reaching out in South Florida

    Reaching out to the communities we serve, to engage them by providing information as well as seeking their input on our projects and processes, is a basic tenet of the U.S. Army Corps of Engineers, Jacksonville District. From formal meetings about the Central Everglades Planning Project to participating in community-based events, the Jacksonville District team is continuously engaged in a multitude of public interactions in south Florida.
  • After inspecting the channel at Cowbone Marsh, Regulatory Division issued a cease and desist order, requiring the Florida Fish and Wildlife Commission to stop sidecasting dredged material into the channel.

    Cowbone Marsh to be protected through Regulatory Division action

    Located within central Glades County, Fla., eight miles upstream of the mouth of Fisheating Creek at the western shore of Lake Okeechobee, lies Cowbone Marsh, an approximately 5,500-acre freshwater marsh system. Fisheating Creek, the only remaining free-flowing waterway feeding into the lake, flows through Cowbone Marsh. Most of the surrounding land is either publicly owned or under conservation easements that restrict development, making it one of the most valuable aquatic and wildlife resource areas in the country.

  • January

    Water flows through the gates of the St. Lucie Lock in late September, as Jacksonville District started discharges from Lake Okeechobee to stem the rapid rise in lake levels after Tropical Storm Isaac. The releases began Sept. 19 and continued until early November.

    Milestones reached at Herbert Hoover Dike as dedication to water management balance continues

    The past year saw both low water and high water at Lake Okeechobee, as well as completion of one project and the start of others on Herbert Hoover Dike (HHD). The best news occurred in October, when the last section of cutoff wall in the dike between Port Mayaca and Belle Glade was accepted by Jacksonville District construction representatives. The action meant 21.4 miles of cutoff wall that had been under construction since 2007 was in place, reducing the risk of failure for the southeast portion of the dike.
  • A warmer than normal winter and heavy early season rains contributed to the highest levels of water hyacinth on the St. Johns River and Lake Okeechobee since 1986.

    Invasive Species biologists combat explosion of aquatic plant growth

    The year 2012 brought many challenges for the Invasive Species Management (ISM) Branch to tackle. Multiple factors led to the highest levels of water hyacinth on Lake Okeechobee since 1986. Water hyacinth invades lakes, ponds, rivers, marshes and other types of wetland habitats. According to the Early Detection and Distribution Mapping System website, water hyacinth can reproduce and quickly form dense floating mats of vegetation, sometimes doubling in size over a two week period. These dense mats reduce light and deplete oxygen levels for submerged plants and aquatic invertebrates.