Category: News

  • Groundwater Control at Belews Creek Dam Upgrades Construction

    Title: Groundwater Control at Belews Creek Dam Upgrades Construction Location: Belews Creek, NC Owner: Duke Power Energy Engineer: AECOM GC: Phillips & Jordan, Inc. Project Revenue: $1,047,000.00 Project Timeline: July 2015 – January 2016 Summary: Griffin achieved water drawdown of over 20 ft. using eductor and wellpoint dewatering at Belews Creek Steam Station Filter Overlay […]

  • Love Field Expansion Project History

    Project Title: Love Field Parking Garage C, Love Field International Airport Owner: Southwest Airlines GC: Hensel Phelps Construction Company Engineer: JACOBS Project revenue: $420,000.00 +/- Project TIME PERIOD: March 2016 – April 2017 Summary: Dallas Love Field Airport seeks substantial dewatering solution during $208 million expansion project. The Challenge: As part of an expansion project […]

  • Pond at Northerly Island

    Island between Burnham Harbor and Lake Michigan, Downtown Chicago, Illinois OWNER: City of Chicago Parks Department GC: FutureNet Group ENGINEER: US Army Corps of Engineers PROJECT REVENUE: $500,000.00 +/- PROJECT TIME PERIOD: December 2010 – May 2011 THE CHALLENGE Excavate a pond up to 18 feet deep with dimensions of 1,700lf x 300lf at the widest point. Pond is a […]

  • Your Coal Ash Dewatering Resource

    Lately, there have been numerous workshops with presentations that focus on CCR water management. Griffin has a wide range of dewatering experience including the installation of deep well, wellpoint and eductor dewatering systems.  We’d like to provide some additional information on eductor dewatering systems as eductors are not normally discussed during these water management presentations. […]

  • Septic Tank Install Project History

    Griffin recently completed a project in Belvidere, IL for an excavating company working at an RV park. There were two large septic tanks being installed, one that is 40’ x 15’ x 12’ deep and the other one 20’ x 10’ x 10’ deep. The challenge that the excavating company faced was to install the […]

  • Court Ruling Helps Clarify Timing of CCR Rule Violations

    Recently, a North Carolina court ruled that CCR closure plans cannot be found in violation of the CCR rule until the plan is implemented. As the planning process continues, many stakeholders are engaged in identifying the most environmentally friendly and cost-effective closure plans. When it comes to groundwater control, interstitial water removal, and treatment of […]

  • Griffin Dewatering Discovers Two Centuries-Old Ships

    Griffin has successfully completed phase one of a complicated two-part project on the waterfront in Alexandria, VA where two centuries-old ships were discovered by archeologists. (New York Times) “The bottom line is that we would not be where we are today in our archeological studies if it wasn’t for the dewatering system.” – EYA Superintendent […]

  • Project History: Chicago Elevator Pit

    This project history examines dewatering performed for a new elevator pit in an existing basement in Chicago. Locked-Up Storage tried to dewater two feet of water by sumping with no success. Griffin installed sanded wickpoints to a depth of eight feet and ran a discharge hose up a vent shaft to discharge outside of the […]

  • Construction Site Dewatering: Techniques and Solutions

    Having a proper construction dewatering plan is imperative to keeping your project on schedule and on budget. Construction dewatering can be very challenging and normally includes the removal, treatment and discharge of groundwater and storm water. Numerous Griffin Dewatering project sites were recently featured in Pile Buck magazine’s cover story on construction site dewatering. Below […]

  • Uplift Pressure Calculation

    Uplift Pressure Calculation / Artesian Reduction System / Relief Well Design When there is an impermeable layer between the bottom of the excavation and a deep aquifer (see Figure below), the ground water head at the aquifer below the subgrade might be sufficiently high to cause soil layers to lose strength and fail. In this […]