Whether seeking solutions to protect people, ecosystems, or infrastructure, we are committed to solving environmental problems facing our clients and our communities in order to build a better tomorrow. 


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Our Experience

Recent Projects

Energy
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Dam Remediation Using High and Low Mobility Pressure Grouting

Logan Martin Dam, owned and operated by Alabama Power Company, is a hydroelectric generation site located on the Coosa River in Vincent, Alabama. Since construction in the late 1960’s, ongoing remedial pressure grouting projects have targeted significant seepage flow reduction beneath the embankment dam which is founded on karst, a limestone geology characterized by underground aquifers, caverns, and the potential for sinkholes, particularly as seepage flow erodes the underlying limestone and continually changes its distribution. Alden and Alabama Power have partnered to design and construct a large scale enclosed pressure grouting test chamber (3’ wide by 3’ tall by 30’ long) and an associated test protocol to evaluate and optimize grout mix design performance in geo-materials that simulate the fractured, cavernous geology at Logan Martin Dam.

This first-of-a-kind test approach uses a small production scale grout plant to prepare and inject the high mobility grout mixtures into the test chamber. The test chamber is designed with discharge ports along its length to allow water initially occupying the test chamber—and subsequently grout—to be displaced as newly batched grout is injected. Throughout the grout injection process, pressure and temperature measurements within the test chamber, as well as discharge flow rate and discharge flow specific gravity measurements out of the test chamber, are used to monitor and evaluate grout dispersion characteristics within the chamber.  

Grout injection criteria used to govern test advancement and later termination includes displaced grout quality (i.e., displaced grout specific gravity relative to that of the freshly batched grout) and the internal test chamber pressure. After grout injection, various performance metrics are evaluated to quantify mix effectiveness. The normalized grout take, for example, evaluates the overall mix efficiency by relating the injected grout volume to the volume available within the geo-material for grout to occupy.

Since conception, updates to the test facility and protocol have been made to facilitate low mobility grout testing, as well as grout performance testing in the presence of water cross flow. Results from this ongoing research program are being used to reduce grouting cost through grout mix design and bore hole spacing optimization, while also improving dam safety by increasing knowledge on how grout penetrates rock fractures without in-situ excavation.

Contact us if you would like to learn more.

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Alden and Alabama Power have partnered to design and construct a first-of-its-kind grout performance testing chamber
Civil Infrastructure
Grout Performance Testing – Logan Martin Dam

An innovative large scale enclosed pressure grouting test chamber is being used to evaluate and optimize grout mix design performance at Logan Martin Dam

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Through funding made available by the U.S. Department of Energy, Alden conducted a series of studies to evaluate and optimize the design and operation of two modular and scalable fish bypass systems developed specifically to provide safe downstream passage of silver American Eels at hydropower projects. The goal of the studies was to address the need for biologically effective and less expensive downstream fish passage technologies for silver eels. The studies were developed specifically for this fish species and life stage due to population declines in many areas of its range and the potential for mortality to occur if eels migrating to the marine environment to spawn are entrained through hydro turbines during their journey to the sea. The large size and unique behaviors of silver eels have made it difficult for dam owners to implement downstream passage measures that are both biologically and cost effective, resulting in a need for new innovative technologies.

The studies conducted by Alden included a laboratory evaluation of the biological performance of the two bypass systems, a field evaluation of biological performance conducted with full-scale bypass systems installed at the intake of a small hydro project in New Hampshire, CFD modeling of the laboratory flume and field evaluation site, and a desktop assessment of the potential for application of each technology at hydro projects within the known range of American Eel and the expected benefits (i.e., biological and economic). Few organizations have the capabilities to conduct this array of technical studies, but Alden’s scientists and engineers have been using various combinations of these approaches and methods to develop and evaluate state-of-the-art fish passage and protection systems for nearly 50 years.

Assistance with the performance and completion of these studies was provided by Lakeside Engineering (bypass design and installation) and Blue Leaf Environmental (DIDSON acoustic camera and 3D acoustic telemetry services).

 

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The laboratory evaluation was conducted in a large re-circulating flume using the Klawa horizontal zig-zag eel bypass system and a vertical eel bypass system developed by Lakeside Engineering
Natural Resources & Environmental Planning
Modular and Scalable Downstream Passage for Silver American Eel

Read how Alden tested the effects of innovative downstream fish passage technologies with lab, CFD, and field analysis. Funded by the Department of Energy

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Alden was contracted by Imperia Engineering for mock-up and head loss testing of cured in place pipe (CIPP) lining. Seabrook Nuclear Power plant was planning to perform maintenance on its service water piping system which consists of safety and non-safety function concrete lined pipe. The planned maintenance consisted of lining the pipes using a glass fiber reinforced epoxy resin composite. To ensure the maintenance activity would be successful, Imperia Engineering organized a mock-up test of the installation mechanics for the smallest inner diameter pipe (20”) and contracted Alden to perform flow testing on the mock-up pipe loop to help determine the effects of the lining on the flow performance of the piping network.

The chosen piping configuration for the mock-up test focuses on a section of 20” pipe that supplies systems related to turbine cooling. The section in question combined a number of direction and elevation changing pipe fittings. Incorporating this section into the mock-up provided a challenge for the installer and provided some insight into the potential stack-up of flow losses from these types of fitting combinations. It made the positive identification of individual fitting losses much more challenging.

Along with assembling the provided test piping, Alden constructed a custom flow loop with a large recirculation pump and a flow meter assembly. The flow meter assembly consisted of two flow meters allowing measurements of flow rate to better than 1% uncertainty down to 2000 gpm. The recirculation pump had a relatively low discharge head capability (<45ft) but a high run out flow rate of 17,500 gpm. The loop was connected to a large water tank reservoir to allow the loop to be reconfigured and accessed between tests.

Each piece of test piping was outfitted with multiple sets of taps for the purpose of pressure loss measurements. Pressure loss measurements along the pipeline were taken at a range of flow rates to evaluate Reynolds number effects.

The pipeline was tested by Alden first in its original cement lined state, then with Weko seals installed at various joint locations, and then finally following CIPP lining of the entire length of test piping (lining performed onsite at Alden by Aquarehab). Alden analyzed the test results to determine friction losses and loss coefficients for each type of fitting and straight sections of pipe, under all three scenarios, providing the required insight to the viability of CIPP lining at Seabrook. Measurements showed that the friction factor drop in the pipe was sufficient to compensate for the reduced pipe diameter. However, losses substantially increased at turns where excess material folds increase turbulent losses by obstructing flow near the inside turn of the wall. Mock-up testing and careful hydraulic analysis is therefore required when applying the lining system to a pipeline where the pump performance margin is small.

Contact us for more information on mock-up testing.

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Alden constructed a custom flow loop with the provided test piping that was  lined onsite by a contractor
Civil Infrastructure
Seabrook Pipe Lining Testing

Alden performed mock-up flow testing to help determine the effects of cured in place pipe lining on flow performance at the Seabrook Nuclear Power Plant.

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Even though McGuire Nuclear Power Plant is located on the shores of Lake Norman, it relies on cooling water from a separate service water pond. Duke Energy, operators of the plant, wanted to investigate the conditions of the service pipeline that connects the service pond to the plant.  They elected to use a robotic underwater vehicle attached to a tether. However, because the service water line connecting the pond to the plant is an important safety function, the retraction tension on the robotic underwater vehicle needed to be validated before the vehicle was deployed using a mock-up test.

Mock-up testing would determine if the tether would remain within the tether failure tension after the vehicle has advanced past several turns and more than several hundred feet into the pipeline. The main sources of tension on the tether are the turns in the pipeline. 

Alden worked with Hibbard Inshore to set up a model of the pipeline bends with limited straight pipe lengths between them to correctly simulate the tether friction during a retraction. In addition, the mock-up test demonstrated to the plant the ability to identify various pipeline characteristics of interest that could be encountered during the real inspection. The mock-up also provided a similar level of water visibility to ensure the rover inspection would still be successful under turbid water conditions.

Contact us for more information on mock-up testing.

 

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A model of the pipeline bends was used to correctly simulate the friction that the tether would experience during a retraction
Civil Infrastructure
Remote Operated Vehicle Mock-Up Test

Alden performed mock-up testing to correctly simulate tension on a tethered ROV

Real Estate
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Verdantas performed construction review services for the newly constructed Museum of the American Revolution in Old City Philadelphia, two blocks away from Independence Hall and the Liberty Bell. The museum took two years to construct and opened in April 2017. One of the interesting parts of this project was an archeological excavation which was performed during the basement excavation. The National Parks building, which was removed to clear the site for the museum construction, had been built over the old houses which dated to the 1700’s. As part of the excavation for the new foundations which extended to as much as 20 feet below the streets, archeologists exposed the old structures and removed artifacts for months before foundations were constructed.

}', 13='{type=image, value=Image{width=1200, height=1600, url='https://f.hubspotusercontent40.net/hubfs/20952198/Museum-of-the-American-Revolution.jpg'}}', 25='{type=number, value=1}', 27='{type=number, value=0}'}
Civil Infrastructure
Museum of the American Revolution

Construction review services for the newly constructed Museum of the American Revolution in Old City Philadelphia.

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We were recommended by an attorney to the owner of a strip mall to define the extent of a chlorinated volatile organic compound (CVOC, primarily tetrachloroethene or [PCE]) plume and implement a long-term remedial strategy without disrupting multiple tenant business operations.

Achievements

  • Excavated accessible CVOC – and fuel oil-impacted soil.
  • Worked with existing business operations to remediate without disruption of business. We installed soil borings inside a pharmacy during off-hours to assess impacted inaccessible soils.
  • We completed indoor air evaluations and risk assessments to evaluate needs for additional remediation and to assess tenants who were not exposed to inhalation risk during remediation. Furthermore, we implemented a periodic indoor air monitoring plan to evaluate ongoing tenant and public exposure.
  • Evaluated potential risks for neighboring properties. We evaluated the downgradient property for potential vapor intrusion impacts while considering proposed site redevelopment plans.
  • Advised our client and their legal counsel on the long- and short-term remedial strategies that allowed the client to plan and budget, while also meeting New Hampshire Department of Environmental Services (NHDES) standards.
  • Continue to manage ongoing requirements associated with the Site’s Groundwater Management Permit.

Scope of Services

  • Site Characterization of CVOC plume
  • Short- and long- term remedial strategy development and implementation
  • Coordinate with client and client’s legal team
  • Complete remediation of CVOC impacts
  • Indoor air assessment
  • On- and off-site vapor intrusion evaluations
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Environmental Assessment & Remediation
Site Assessment and Remediation of Former Dry Cleaners Comingled CVOC & Fuel Oil Site

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The historic 325-acre Fort DuPont site will eventually include a new residential community, ships and an entertainment center while preserving many former military buildings that date back to the 19th century. The Fort DuPont Redevelopment and Preservation Corp. plans to recreate the base as a waterfront community where residents can live amid – and in some cases in – renovated military buildings, and enjoy the close proximity of the Delaware River and the Chesapeake & Delaware Canal. Verdantas' engineers and scientists are providing traffic engineering, civil engineering, geotechnical engineering, permitting and construction review and testing.

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The master plan for Fort DuPont.
Civil Infrastructure | Natural Resources & Environmental Planning
Fort DuPont

Civil, traffic, geotechnical engineering, permitting and construction review and testing for the historic 325-acre residential community.

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The Philadelphia Authority for Industrial Development (“PAID”) received funding from the USEPA to establish a new revolving loan fund (“RLF”) for brownfield remediation in Philadelphia. The Philadelphia Industrial Development Corporation (PIDC) administers the RLF on behalf of PAID. The revolving loan fund is intended to support brownfield remediation projects within the City of Philadelphia, specifically focusing on the 3,700 acre industrial corridor known as the Lower Schuylkill. PIDC selected Verdantas to provide environmental engineering and professional services for high-quality technical assistance, advisory services, regulatory coordination and project oversight to support the successful administration of the program. Verdantas, in support of PIDC’s administration of the program developed the following: application document templates; assisted with the development and implementation of a marketing program to solicit applications; assisted PIDC with the development of an applicant ranking system; reviewed applicant eligibility based on the requirements of the EPA and PADEP; and provided oversight of awardees, including review of progress reports. Verdantas also completed the reporting required by the EPA’s ACRES system. Verdantas was recently presented with the 2017 Phoenix Award for U.S. EPA Region 3 at the 2017 National Brownfields Conference for our Pennovation Center project performed for the Philadelphia Industrial Development Corporation. The Phoenix Awards are recognized nationally as the award for outstanding achievement of excellence in brownfield redevelopment.

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Environmental Assessment & Remediation
PIDC Revolving Loan Fund

Environmental engineering and professional services for technical assistance, advisory services, regulatory coordination and project oversight to support the successful administration of the Revolving Loan Fund.

Industrial
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The BDM Warren Steel property is an approximately 1,200-acre brownfield that hosted steel-making operations beginning around 1912. 

This property changed ownership and names multiple times over the years and was known as Republic Steel Corporation, LTV Steel Company, WCI Steel, RG Steel, and BDM Steel.  Steel production at the mill has ceased and BDM demolished most of the buildings.  Verdantas was engaged to provide guidance and services in support of the site cleanup, restoration and permitting which occurred in multiple phases and is currently still in progress.

BDM invested private capital to demolish vertical structures, demolish building foundations and slabs.  They then recycled concrete for beneficial on-site reuse, and several thousand tons of steel was recycled.  Verdantas provided the oversite and guidance for the regulatory and permitting aspect of the project and completed the Phase I and Phase II Property Assessments and the Property Assessment Work Plans.  We also entered the site into the Ohio VAP (Voluntary Action Program) and MOA (Memorandum of Agreement) track.  The project was executed with the construction and remediation activities from the perspective of waste reduction, reuse, and recycling.

Verdantas also oversaw beneficial use and surface water impoundments closures in accordance with an approved Closure Plan that follows Ohio EPA Closure Plan Review Guidance for RCRA Facilities.  The related materials were reused in accordance with an Integrated Alternative Waste Management Plan (IAWMP).  These alternative management approaches to both the liquids and semi-solid materials located in the ponds resulted in the savings of over $5 million.

}', 13='{type=image, value=Image{width=336, height=463, url='https://f.hubspotusercontent40.net/hubfs/20952198/Vintage_Labor_Art_Steel_Mill_Foundry_Pour-1md.jpg'}}', 25='{type=number, value=1}', 27='{type=number, value=0}'}
Environmental Assessment & Remediation
BDM Warren Steel Site

Site assessment and remediation for 1,200-acre brownfield site

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For over 40 years, Verdantas has partnered with the US Army Corps of Engineers (USACE) and the Diamond State Port Corporation (DSPC) to enhance the Port of Wilmington, the heart of Delaware’s blue collar jobs. Specifically, when these groups have needed assistance planning improvements and managing the site, they have consistently turned to Verdantas for support. Over the years, Verdantas has provided extensive environmental, civil, geotechnical, marine, and materials testing engineering services for projects including environmental maintenance and larger projects such as a $10 million expansion at Wharf 7, the addition of a $30 million automobile berth in the Delaware river, the design of a multiple dry and conditioned warehouses, container crane staging and support and monitoring and reconstruction on over 150 acres of reclaimed land adjacent to the Delaware River. Here, Verdantas' rich history of institutional knowledge at the site, enabled the Port to continue its successful work as an economic driver.

}', 13='{type=image, value=Image{width=1200, height=796, url='https://f.hubspotusercontent40.net/hubfs/20952198/Port-of-Wilmington-NEW%20(1).jpg'}}', 25='{type=number, value=1}', 27='{type=number, value=0}'}
Environmental Assessment & Remediation | Civil Infrastructure
Port of Wilmington Multi-Disciplined Projects

Extensive environmental, civil, geotechnical, marine, and materials testing engineering services for projects at the Port of Wilmington.

{id=62159976467, createdAt=1639768047491, updatedAt=1646949550844, path='dam-repairs-engineering-design-and-permitting', name='Engineering for Dam Repairs | Design, Permitting and Construction Observation', 1='{type=string, value=Engineering for Dam Repairs | Design, Permitting and Construction Observation}', 33='{type=number, value=0}', 34='{type=list, value=[{id=10, name='Civil Infrastructure', order=4}]}', 35='{type=string, value=Industrial}', 4='{type=string, value=Our team performed simultaneous engineering evaluations, mitigation design, permitting and construction oversight and support}', 36='{type=string, value=MA}', 5='{type=list, value=[{id=17, name='Industrial', order=2}]}', 37='{type=list, value=[{id=83, name='Site Engineering', order=34}]}', 39='{type=string, value=dam-repairs-engineering-design-and-permitting}', 8='{type=string, value=

Due to corrosion of an 11-foot diameter riveted steel penstock that extended through the earthen berm portion of the dam, the integrity of the earthen berm was jeopardized.  This was evident from sink holes that had developed within the berm near the penstock.  Verdantas' experience in geotechnical engineering and permitting and our ability to look at the “big picture” enabled us to perform simultaneous engineering evaluations, seepage mitigation design and permitting, as well as construction oversight and support during implementation of the work.

Achievements

IDENTIFIED SEEPAGE THROUGH THE EMBANKMENT AS THE CAUSE OF OBSERVED SINK HOLES – Verdantas performed a subsurface investigation through the dam embankment, and our observations of the embankment materials confirmed seepage as the primary cause of sink holes.

DESIGNED SEEPAGE MITIGATION – consisting of improving the dam embankment by installing a low permeability geosynthetic clay liner along with new rip rap armoring to prevent erosion and scour.  Prepared design plans identifying the extent of improvements, required materials, construction methods, etc.

SUCCESSFULLY PERMITTED THE PROJECT THROUGH STATE AND FEDERAL AGENCIES – The project included obtaining the necessary permits (Massachusetts Chapter 253 Dam Safety Permit, Wetlands Protection Act permit and Notice of Intent, and Remediation General Permit for construction dewatering). In addition, Verdantas prepared an Emergency Action Plan for Construction Activities as required by the Chapter 253 permit.

OVERSAW CONSTRUCTION ACTIVITIES AND ADDRESSED PROJECT CHANGES AS ENCOUNTERED – Verdantas performed regular inspections of the construction activities to verify compliance with the design plans and permits.  Construction efforts resulted in the need to modify the design as unexpected conditions were encountered, and Verdantascommunicated these changes to the owner and permitting agencies to maintain compliance and successfully complete the project.

Scope of Services

  • Geotechnical Engineering
  • Site Investigation
  • Dam Embankment Seepage Analysis and Remedial Design
  • State and Federal Permitting
  • Construction Oversight
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Civil Infrastructure
Engineering for Dam Repairs | Design, Permitting and Construction Observation

Our team performed simultaneous engineering evaluations, mitigation design, permitting and construction oversight and support

{id=73716482709, createdAt=1652730927762, updatedAt=1652731611670, path='amazon-logistics-center', name='Amazon Logistics Center', 1='{type=string, value=Amazon Logistics Center}', 33='{type=number, value=0}', 34='{type=list, value=[{id=6, name='Environmental Assessment & Remediation', order=0}, {id=9, name='Applied Data & Technology', order=3}, {id=10, name='Civil Infrastructure', order=4}]}', 35='{type=string, value=Stoltz Real Estate Partners}', 4='{type=string, value=Multi-disciplined services for the construction of a 1.6 million square foot, state-of-the-art Amazon Logistics Center.}', 36='{type=string, value=New Castle County, DE}', 5='{type=list, value=[{id=17, name='Industrial', order=2}, {id=21, name='Technology', order=6}]}', 37='{type=list, value=[{id=49, name='Site Assessment', order=0}, {id=83, name='Site Engineering', order=34}, {id=84, name='Transportation Civil Design', order=35}, {id=87, name='Construction Services', order=38}, {id=114, name='Geotechnical Engineering', order=65}]}', 38='{type=string, value=Amazon}', 39='{type=string, value=amazon-logistics-center}', 8='{type=string, value=

Verdantas provided comprehensive civil, environmental, geotechnical, traffic and construction services for the construction of a 1.6 million square foot, state-of-the-art Amazon Logistics Center on a 125-acre site in central New Castle County, DE. The site was a former borrow pit that required extensive regrading and fill. Soft soils conditions require a ground improvement program consisting of deep dynamic compaction.

All studies, design, and project approvals were accomplished in an expedited manner in less than seven months. The Verdantas team worked closely with the owner, construction manager and building tenant to address design and operational changes requested during the latter stages of design and throughout the construction process. Project construction, including over 800,000 cubic yards of site earthwork, was completed in 10 months.

}', 13='{type=image, value=Image{width=959, height=630, url='https://www.verdantas.com/hubfs/Amazon.png'}}', 14='{type=string, value=The new Amazon Logistics Center in Bear, DE.}', 25='{type=number, value=0}', 27='{type=number, value=0}'}
The new Amazon Logistics Center in Bear, DE.
Environmental Assessment & Remediation | Applied Data & Technology | Civil Infrastructure
Amazon Logistics Center

Multi-disciplined services for the construction of a 1.6 million square foot, state-of-the-art Amazon Logistics Center.

Water
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As a part of its water and wastewater infrastructure asset management program (AMP), The Town of Millsboro converted decades of paper based utility maps and data into digital datasets using GIS technology. Digital infrastructure data was then overlaid with other pertinent datasets, enabling the use of spatial analysis techniques for the development of probability of failure, consequence of failure and risk assessment models. The AMP incorporates these models as tools to help prioritize funding needs. Water and wastewater maps are available from cloud based data services allowing for data viewing and editing on both desktop and mobile devices.

}', 13='{type=image, value=Image{width=1200, height=591, url='https://f.hubspotusercontent40.net/hubfs/20952198/Millsboro-Asset-Management.jpg'}}', 14='{type=string, value=Digital cloud-based water system map.}', 25='{type=number, value=1}', 27='{type=number, value=0}'}
Digital cloud-based water system map.
Applied Data & Technology | Civil Infrastructure
Millsboro Asset Management Plan

Developed an Asset Management Plan for Millsboro's water and wastewater system assets.

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The Delaware City Wastewater Treatment Plant Headworks project was the first phase of larger project to upgrade the facility and increase capacity. An existing cramped headworks building and undersized static screen were completely replaced while maintaining operation of the facility. The new headworks building was constructed on top of an existing flow equalization tank and houses two (2) 2,100 GPM internally fed rotary drum wedgewire screens which are similar to equipment used at other County facilities. The innovative design of the new headworks building allowed the County to forgo the installation of a new pile foundation on this site which exhibits poor subgrade conditions.

}', 13='{type=image, value=Image{width=260, height=195, url='https://f.hubspotusercontent40.net/hubfs/20952198/Delaware-City-WWTP.jpg'}}', 25='{type=number, value=1}', 27='{type=number, value=0}'}
Civil Infrastructure
Delaware City Wastewater Treatment Plant

Design of a new headworks building as part of a larger plan to upgrade the facility and increase capacity.

{id=62148273476, createdAt=1639753682992, updatedAt=1646949520814, path='mill-creek-estates-wastewater-treatment-plant-improvements', name='Phase 10 Water System Improvements', 1='{type=string, value=Phase 10 Water System Improvements}', 33='{type=number, value=0}', 34='{type=list, value=[{id=10, name='Civil Infrastructure', order=4}]}', 35='{type=string, value=Tuppers Plains – Chester Water District (TPCWD) }', 4='{type=string, value=Civil engineering and land surveying for water systems including waterlines, elevated water storage tank, and booster station}', 36='{type=string, value=Meigs County, OH}', 5='{type=list, value=[{id=18, name='Water', order=3}]}', 37='{type=list, value=[{id=83, name='Site Engineering', order=34}, {id=88, name='Survey', order=39}, {id=90, name='Water & Wastewater Design', order=41}]}', 39='{type=string, value=mill-creek-estates-wastewater-treatment-plant-improvements}', 8='{type=string, value=

Verdantas is working with Tuppers Plains – Chester Water District (TPCWD) to complete their Phase 10 Water System Improvements

The improvements include approximately 45,600 feet of 12, 10” and 8” waterline replacement, a new 250,000-gallon elevated water storage tank and a new above-grade 500 gpm booster station. In addition, the project includes system-wide water meter replacement of approximately 5,200 residential and commercial meters.

Verdantas is providing project administration, survey, detailed design, permitting, bidding, construction administration and construction observation services on this nearly $6.9 million project. The project involved coordination and permitting with ODOT, Meigs County Engineer and townships for work along and across roadways including U.S. Route 33 and also Prater Engineering for electrical design.

The project was ranked #18 among Ohio EPA’s Water Supply Revolving Loan Account statewide projects and will receive 50% of those funds in principal forgiveness with the balance in 0% interest loan. The project also received $250,000 in an Appalachian Regional Commission Grant.

 

}', 13='{type=image, value=Image{width=1073, height=1431, url='https://f.hubspotusercontent40.net/hubfs/20952198/Phase-10-Tuppers-Plains-Water-Tower-e1591974116353.jpg'}}', 25='{type=number, value=1}', 27='{type=number, value=0}'}
Civil Infrastructure
Phase 10 Water System Improvements

Civil engineering and land surveying for water systems including waterlines, elevated water storage tank, and booster station

{id=62150573889, createdAt=1639756290926, updatedAt=1646949528390, path='frankford-water-treatment-plant', name='Frankford Water Treatment Plant', 1='{type=string, value=Frankford Water Treatment Plant}', 33='{type=number, value=0}', 34='{type=list, value=[{id=10, name='Civil Infrastructure', order=4}]}', 35='{type=string, value=Town of Frankford}', 4='{type=string, value=Engineering services for the planning, design, bidding, administration, and inspection of improvements to a new water treatment plant for the Town of Frankford, DE.}', 36='{type=string, value=Frankford, Delaware}', 5='{type=list, value=[{id=18, name='Water', order=3}, {id=19, name='Government', order=4}]}', 37='{type=list, value=[{id=90, name='Water & Wastewater Design', order=41}]}', 39='{type=string, value=frankford-water-treatment-plant}', 8='{type=string, value=

Verdantas provided engineering services for the planning, design, bidding, administration, and inspection of improvements to a new, yet inoperable, WTP for the Town of Frankford. The Town of Frankford constructed a new WTP in 2005 that was inoperable upon start-up. After several years in which the WTP was idle and the subject of numerous, but fruitless suggested repairs and operational improvements, the State of Delaware and Town of Frankford contracted Verdantas to design, bid, and administer the construction of improvements to the plant. Process design changes included installation of a greensand filter system for iron removal and a backwash storage and decant system. The WTP was successfully started in October 2010 and is currently in operation.

}', 13='{type=image, value=Image{width=1200, height=1600, url='https://f.hubspotusercontent40.net/hubfs/20952198/Frankford-WTP.jpg'}}', 25='{type=number, value=1}', 27='{type=number, value=0}'}
Civil Infrastructure
Frankford Water Treatment Plant

Engineering services for the planning, design, bidding, administration, and inspection of improvements to a new water treatment plant for the Town of Frankford, DE.

Government
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As a part of its water and wastewater infrastructure asset management program (AMP), The Town of Millsboro converted decades of paper based utility maps and data into digital datasets using GIS technology. Digital infrastructure data was then overlaid with other pertinent datasets, enabling the use of spatial analysis techniques for the development of probability of failure, consequence of failure and risk assessment models. The AMP incorporates these models as tools to help prioritize funding needs. Water and wastewater maps are available from cloud based data services allowing for data viewing and editing on both desktop and mobile devices.

}', 13='{type=image, value=Image{width=1200, height=591, url='https://f.hubspotusercontent40.net/hubfs/20952198/Millsboro-Asset-Management.jpg'}}', 14='{type=string, value=Digital cloud-based water system map.}', 25='{type=number, value=1}', 27='{type=number, value=0}'}
Digital cloud-based water system map.
Applied Data & Technology | Civil Infrastructure
Millsboro Asset Management Plan

Developed an Asset Management Plan for Millsboro's water and wastewater system assets.

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To support tourism and recreation while restoring maritime history, the City of New Castle embarked on a waterfront redevelopment project. The project’s focal point was a new dock to service the historic vessel, Kalmar Nyckel, other visiting tall ships and Forts DuPont and Mott Ferries. The new dock replaced a pier that was destroyed by Hurricane Sandy and, therefore, design and construction needed to be robust to handle the frequently harsh environment of the Delaware River. Ultimately, the dock was designed and constructed with a state-of-the-art pile foundation and substructure designed to meet the historic aesthetics and sustainability sought by the City.

}', 13='{type=image, value=Image{width=700, height=466, url='https://f.hubspotusercontent40.net/hubfs/20952198/New-Castle-Dock2.jpg'}}', 25='{type=number, value=1}', 27='{type=number, value=0}'}
Civil Infrastructure
New Castle Dock

Design of a new dock to service historic vessels, tall ships and Forts DuPont and Mott Ferries.

{id=62146090122, createdAt=1639754440881, updatedAt=1646949524090, path='delaware-city-wastewater-treatment-plant', name='Delaware City Wastewater Treatment Plant', 1='{type=string, value=Delaware City Wastewater Treatment Plant}', 33='{type=number, value=0}', 34='{type=list, value=[{id=10, name='Civil Infrastructure', order=4}]}', 35='{type=string, value=Delaware City Wastewater Treatment Plant}', 4='{type=string, value=Design of a new headworks building as part of a larger plan to upgrade the facility and increase capacity.}', 36='{type=string, value=Delaware City, DE}', 5='{type=list, value=[{id=18, name='Water', order=3}, {id=19, name='Government', order=4}]}', 37='{type=list, value=[{id=90, name='Water & Wastewater Design', order=41}]}', 39='{type=string, value=delaware-city-wastewater-treatment-plant}', 8='{type=string, value=

The Delaware City Wastewater Treatment Plant Headworks project was the first phase of larger project to upgrade the facility and increase capacity. An existing cramped headworks building and undersized static screen were completely replaced while maintaining operation of the facility. The new headworks building was constructed on top of an existing flow equalization tank and houses two (2) 2,100 GPM internally fed rotary drum wedgewire screens which are similar to equipment used at other County facilities. The innovative design of the new headworks building allowed the County to forgo the installation of a new pile foundation on this site which exhibits poor subgrade conditions.

}', 13='{type=image, value=Image{width=260, height=195, url='https://f.hubspotusercontent40.net/hubfs/20952198/Delaware-City-WWTP.jpg'}}', 25='{type=number, value=1}', 27='{type=number, value=0}'}
Civil Infrastructure
Delaware City Wastewater Treatment Plant

Design of a new headworks building as part of a larger plan to upgrade the facility and increase capacity.

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Verdantas provided engineering services for the planning, design, bidding, administration, and inspection of improvements to a new, yet inoperable, WTP for the Town of Frankford. The Town of Frankford constructed a new WTP in 2005 that was inoperable upon start-up. After several years in which the WTP was idle and the subject of numerous, but fruitless suggested repairs and operational improvements, the State of Delaware and Town of Frankford contracted Verdantas to design, bid, and administer the construction of improvements to the plant. Process design changes included installation of a greensand filter system for iron removal and a backwash storage and decant system. The WTP was successfully started in October 2010 and is currently in operation.

}', 13='{type=image, value=Image{width=1200, height=1600, url='https://f.hubspotusercontent40.net/hubfs/20952198/Frankford-WTP.jpg'}}', 25='{type=number, value=1}', 27='{type=number, value=0}'}
Civil Infrastructure
Frankford Water Treatment Plant

Engineering services for the planning, design, bidding, administration, and inspection of improvements to a new water treatment plant for the Town of Frankford, DE.

Transportation
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For over 40 years, Verdantas has partnered with the US Army Corps of Engineers (USACE) and the Diamond State Port Corporation (DSPC) to enhance the Port of Wilmington, the heart of Delaware’s blue collar jobs. Specifically, when these groups have needed assistance planning improvements and managing the site, they have consistently turned to Verdantas for support. Over the years, Verdantas has provided extensive environmental, civil, geotechnical, marine, and materials testing engineering services for projects including environmental maintenance and larger projects such as a $10 million expansion at Wharf 7, the addition of a $30 million automobile berth in the Delaware river, the design of a multiple dry and conditioned warehouses, container crane staging and support and monitoring and reconstruction on over 150 acres of reclaimed land adjacent to the Delaware River. Here, Verdantas' rich history of institutional knowledge at the site, enabled the Port to continue its successful work as an economic driver.

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Environmental Assessment & Remediation | Civil Infrastructure
Port of Wilmington Multi-Disciplined Projects

Extensive environmental, civil, geotechnical, marine, and materials testing engineering services for projects at the Port of Wilmington.

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Background

The South Station Transportation Center (SSTC), located in Boston, Massachusetts, consists of a train terminal, regional bus terminal, and a public parking garage. Currently the bus terminal and parking garage are located above the south portion of the train platforms. The section of the tracks and platforms between the north end of the SSTC and the head house, which ranges in length from about 365 to 525 feet, is currently uncovered and open to the atmosphere.

The Boston South Station Project proposed to build high rise structures and to expand the bus terminal over the existing platform areas of South Station. In effect, the development will fully enclose the station tracks and platforms with the exception of the south “portal” area and the east edge of the development along Track 13.

Work Performed

Three locomotive/track arrangements were modeled to provide a representation of the “worst case” conditions with respect to the collection of the main and HEP engine diesel exhausts and cooling fan flows.

The efficacy of multiple exhaust hoods were evaluated to meet target health and safety standards while trains were parked at idle at the head end of the tracks. Specifically, the analyses were performed to ensure that the proposed track exhaust and general ventilation systems were able to maintain safe levels of train engine emissions concentrations and ambient air temperature while the trains were parked and idling in the station.

Project Evolution

  • 1990 Alden initially provided the design for track exhaust hoods to remove diesel products from the ventilation systems to achieve safe levels. Design work was proved out through the use of physical scale modeling, chosen for its cost effectiveness
  • 2005-2008 Alden provided the initial ventilation design for the high rise overbuild construction project
  • 2017-2018 Following the reboot of the projct, Alden evaluated multiple scenarios to develop and finalize a robust ventilation system that could handle a variety of station situations.

Visualization of the Computational Model [below] shows the transient locomotive through station to show thermal and pollutant capture.

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Discover More

 

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The final artistic track view with passengers for scale (2018).
Civil Infrastructure
Train Station Ventilation System Design

Read how CFD modeling was used to show compliance with specifications and code requirements for a major New England rail station.

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Verdantas is providing services to Diamond State Port Corporation to assist with the assessment, permitting and design for the expansion of the Port of Wilmington at the proposed Edgemoor Container Terminal, New Castle County, DE. The project has included permitting support to obtain a State of Delaware Subaqueous Lands Permit, a Coastal Management Program Consistency Determination and a U.S. Army Corps of Engineers (USACE) Section 404 Clean Water Act individual permit, Section 10 permit and Section 408 permit.

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Civil Infrastructure
Edgemoor Container Terminal

Assessment, permitting and design support at the Port of Wilmington

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Incyte Corporation is a rapidly growing biopharmaceutical company, and this growth necessitated a substantial expansion to their current facility along the affluent and geologically challenging Augustine Cut-off corridor in Wilmington, DE. Our experts worked closely with Incyte and their design and construction team to conceptualize a truly breathtaking facility, representative of Incyte’s core values through the feasibility, planning and design phases of the project. The community-sensitive design, including a 154,000 square foot building and a 355-car parking garage, will be part of an aesthetically pleasing and highly functional campus, meeting the needs of Incyte and their employees while complimenting the unique and historic character of their existing building and the surrounding neighborhood.

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Incyte Corporation's newly constructed headquarters.
Civil Infrastructure
Incyte Corporation Headquarters

Feasibility, planning, and community-sensitive design to support a rapidly growing biopharmaceutical company

Technology
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Verdantas performed a significant scope of services for the ProLogis Park 70 E-Commerce site in Etna Township, Ohio.

The build to suit project consisted of  site development for a 855,000 sf building that could accommodate truck dock facilities on the west side at completion of construction and accommodate truck dock facilities in the future on the east side along with a large employee parking area.

The storm water outlet for the site was located within the limited access right-of-way for Interstate 70, therefore Verdantas worked closely with the Licking County Engineer’s Office and Ohio Department Of Transportation on the storm water control of the project.  Along with the on-site design Verdantas was also required to analyze the offsite storm water runoff from the eastern site (the Holy Cross Cemetery) and provide an overflow swale to collect higher rainfall events and re-route storm water runoff from the creek.

In addition, Verdantas' survey department provided all aspects of surveying services for this project.  Verdantas performed an ALTA survey of the original property and all legal descriptions prior to the development of the industrial park.

Along with a development of this magnitude, roadway improvements were also required.  Verdantas worked with the Licking County Engineer’s Office and ODOT to provide a comprehensive Traffic Impact Analysis as well as the design and construction plans for the turn lanes and signals on SR 40 and Etna Parkway.  Verdantas managed the improvements through the public bidding and construction phases.

The schedule for this project demonstrates Verdantas' ability to meet the owner’s goals for the project, coordinate with the contractors during construction and also maintain the high level of design requirements for the reviewing agencies.  While this building has not obtained formal LEED (Leadership in Energy and Environmental Design) certification, all aspects of the civil design meet the LEED design requirements for storm water runoff and control.

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Civil Infrastructure
E-Commerce Distribution Center

Civil site design and construction services for distribution facility.

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Verdantas provided comprehensive civil, environmental, geotechnical, traffic and construction services for the construction of a 1.6 million square foot, state-of-the-art Amazon Logistics Center on a 125-acre site in central New Castle County, DE. The site was a former borrow pit that required extensive regrading and fill. Soft soils conditions require a ground improvement program consisting of deep dynamic compaction.

All studies, design, and project approvals were accomplished in an expedited manner in less than seven months. The Verdantas team worked closely with the owner, construction manager and building tenant to address design and operational changes requested during the latter stages of design and throughout the construction process. Project construction, including over 800,000 cubic yards of site earthwork, was completed in 10 months.

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The new Amazon Logistics Center in Bear, DE.
Environmental Assessment & Remediation | Applied Data & Technology | Civil Infrastructure
Amazon Logistics Center

Multi-disciplined services for the construction of a 1.6 million square foot, state-of-the-art Amazon Logistics Center.