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    Information about work performed under water to maintain dams and hydro facilities, such as dam inspection, dewatering, repairs and routine maintenance.

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    Latest Underwater Work News

    Grant PUD narrows causes of Wanapum Dam fracture


    The foundation below Wanapum Dam was not a factor in creating the fracture on the structure's pier monolith No. 4, Grant County Public Utilities District has determined.

    NPC completes underwater work at Agus 6 hydroelectric plant


    Operations have resumed at the 200-MW Agus 6 hydropower plant after the Philippines' National Power Corp. finished plugging a leak in the dam's blow-off pipe.

    ASI-Marine unveils new tool for hydropower project tunnel inspections


    A new remotely operated vehicle (ROV) from Canadian manufacturer ASI-Marine Technology is capable of giving a comprehensive view of partially-flooded waterways.

    Upgrade Improves Usefulness of FERC Notices on HydroWorld.com


    Subscribers to the premium content portion of the HydroWorld.com website now can access email addresses for contacts at hydroelectric projects licensed or permitted by the Federal Energy Regulatory Commission.

    Malawi extends call for gates, civil construction, weed collector at Kamuzu Barrage


    The government of Malawi has extended the deadlines for bids for gates, civil construction and a jib crane/weed collector for the upgrade of Kamuzu Barrage at Liwonde on Malawi's Shire River.

    Wanapum Dam stabilizing after water levels drop


    Officials with the Grant County Public Utilities District report that a cracked area on a Wanapum Dam spillway are stabilizing as water levels behind the dam have dropped.

    Corps awards contract for seepage barrier construction at Bolivar Dam


    The U.S. Army Corps of Engineers has awarded a US$44.2 million contract to Treviicos South Inc. to construct a dam safety seepage barrier at Ohio's Bolivar Dam.

    Drawdown under way after crack discovered in Wanapum Dam spillway


    A drawdown of water behind Washington's Wanapum Dam continued today as crews work on stabilizing a crack discovered on one of the dam's spillway sections, the Grant County Public Utilities District said.

    Corps issues contract for monolith repairs at John Day hydropower plant


    The U.S. Army Corps of Engineers has awarded a contract worth US$564,000 to Emagineered Solutions Inc. for drilling and grouting services at the 2,160-MW John Day hydropower plant in Oregon.

    U.S. seeks new control structure at Saylorville Dam


    The U.S. Army Corps of Engineers seeks bids to construct a new diversion dam control structure at Saylorville Dam in Polk County, Iowa.

    Costa Rica seeks trash rake for 305.5-MW Reventazon hydro project


    Costa Rica's electric utility seeks bids to supply a trash rake for the 305.5-MW Reventazon hydroelectric project in the Siquirres area of Costa Rica's Limon Province.

    Hydro Buyer's Guide website update provides great new features


    An update to the Hydro Buyers' Guide online at HydroWorld.com provides a clean new look and many updated features, including products and services grouped into seven broad categories for ease of use.

    U.S. seeks firms able to repair dam joints at 2,160-MW John Day hydro project


    The U.S. Army Corps of Engineers seeks information on firms able to perform specific drilling and grouting services to repair failed monolith joint waterstops at 2,160-MW John Day Dam on the Columbia River in Oregon.

    Hibbard Inshore provides underwater services at Australia's Snowy Mountain hydropower project


    Underwater services provider Hibbard Inshore has completed another round of inspections of Australia's 3,756-MW Snowy Mountains hydropower project using its tethered vehicles, the Michigan-based company has announced.

    Corps sets industry day for cut-off wall civil work at Melvin Price Locks and Dam


    The U.S. Army Corps of Engineers has scheduled a construction industry day to discuss plans to construct a seepage cut-off wall at Melvin Price Locks and Dam on the Mississippi River near Alton, Ill.

    Deep Trekker unveils underwater work ROV unit


    Canadian manufacturer Deep Trekker Inc. has introduced a new remotely operated vehicle (ROV) that could have underwater work applications for hydropower project operators.

    Canada's BC Hydro seeks diving services throughout British Columbia


    Canadian utility BC Hydro invites applications for pre-qualification to provide commercial diving services to the hydropower utility at locations throughout British Columbia.

    Underwater technology company expands operation


    Underwater technology developer EdgeTech has expanded its main office in West Wareham, Mass., giving the company more than 30,000 square feet of manufacturing and office space.

    U.S. further extends bid date for dam safety cutoff wall at East Branch Dam


    The U.S. Army Corps of Engineers set another bid deadline for dam safety work to construct a deep cutoff wall at East Branch Dam on the East Branch Clarion River in Pennsylvania.

    Saab adds to underwater work ROV capabilities with Hydro-Lek acquisition


    Hydro technology manufacturer Saab Seaeye has acquired United Kingdom-based Hydro-Lek Limited in an effort to strengthen the company's product portfolio of remotely operated, autonomous and hybrid underwater vehicles

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