News and Events

Project History: Chicago Elevator Pit

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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   …Continue Reading

Construction Site Dewatering: Techniques and Solutions

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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   …Continue Reading

Griffin Dewatering Discovers Two Centuries-Old Ships

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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. “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 The Problem Donohoe   …Continue Reading

Uplift Pressure Calculation

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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   …Continue Reading

3 Tips for Construction Risk Management

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This article from Connect & Construct contains three helpful tips to keep in mind when managing your construction risk. We have provided some commentary with each one. Manage construction safety: “When it comes to construction safety, having the information you need organized and readily available at your fingertips can avoid a lot of common safety   …Continue Reading

Griffin Project of the Month: March 2018

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Project Name: Portals V Project Location: Washington, DC Griffin Customer: Balfour Beatty System: Deep Wells The Portals V project is a high visibility development encircled by the Treasure Department, The Mandarin Hotel, Jefferson Memorial and Potomac River. Griffin Dewatering installed a system consisting of 22 deep wells that successfully dewatered the project area and allowed   …Continue Reading

Griffin Dewatering Expands Capacity with Foothill Dewatering Acquisition

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Griffin’s best-in-class water treatment capabilities now available to Foothill customers Houston, Texas – February 21, 2018:  Griffin Dewatering announced the acquisition of groundwater control firm Foothill Engineering and Dewatering, and Foothill Drilling, of Riverside, California for an undisclosed sum.  “Foothill has a 30-plus year reputation of excellence in meeting the construction dewatering needs of clients   …Continue Reading

Griffin Pioneers Successful Treatment of EPA’s Contaminants of Emerging Concern

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Project Background and Challenges A global general contractor was demolishing and building a deicing facility for the city’s international airport. The project consisted of demolishing of an existing Stormwater and Deicing Collection Facility and constructing of a new Stormwater and Deicing Collection Facility as part of ABIA Terminal/Apron Expansion Project in Austin, TX. The footprint   …Continue Reading

Safe and Effective Coal Ash Dewatering Project History

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Safe and effective management of coal-combustible residuals is imperative. Not only for EPA compliance, but to maintain the integrity of your excavations and to stay on schedule and within budget. Read below to learn about a successful recent coal ash dewatering project that Griffin delivered: Project Background The project consisted of lowering the groundwater and   …Continue Reading

Managing your Construction Risk

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How to Manage Seven Types of Construction Excavation Risk: This article from Project Management Reviews describes seven categories of risk in construction projects.  Construction projects with excavations below the groundwater table can mitigate these seven types of risk with proper construction dewatering system design and installation: “Contractual risks. Missing milestone deadlines can cost time, money   …Continue Reading

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