Client Market Sectors

{id=61570585152, createdAt=1639074811251, updatedAt=1646949469776, path='grout-performance-testing-logan-martin-dam', name='Grout Performance Testing | Logan Martin Dam', 1='{type=string, value=Grout Performance Testing – Logan Martin Dam}', 33='{type=number, value=0}', 34='{type=list, value=[{id=10, name='Civil Infrastructure', order=4, label='Civil Infrastructure'}]}', 4='{type=string, value=An innovative large scale enclosed pressure grouting test chamber is being used to evaluate and optimize grout mix design performance at Logan Martin Dam}', 5='{type=list, value=[{id=15, name='Energy', order=0, label='Energy'}, {id=18, name='Water', order=3, label='Water'}]}', 37='{type=list, value=[{id=95, name='Dam Safety Services', order=46, label='Dam Safety Services'}]}', 6='{type=list, value=[{id=11, name='Pressure Grouting', order=10, label='Pressure Grouting'}, {id=13, name='Dam Remediation', order=12, label='Dam Remediation'}, {id=14, name='Dam Safety', order=13, label='Dam Safety'}, {id=30, name='Hydropower', order=29, label='Hydropower'}]}', 7='{type=list, value=[{id=1, name='Physical Modeling', order=0, label='Physical Modeling'}]}', 39='{type=string, value=grout-performance-testing-logan-martin-dam}', 8='{type=string, value=

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.

}', 13='{type=image, value=Image{width=1500,height=575,url='https://20952198.fs1.hubspotusercontent-na1.net/hubfs/20952198/PROJECTS/ALDEN/Grout-testing/Grout-Performance-Testing-Chamber.jpeg',altText=''}}', 14='{type=string, value=Alden and Alabama Power have partnered to design and construct a first-of-its-kind grout performance testing chamber }', 15='{type=image, value=Image{width=1600,height=575,url='https://20952198.fs1.hubspotusercontent-na1.net/hubfs/20952198/PROJECTS/ALDEN/Grout-testing/Grout-Performance-Testing-Rock-Side-View.jpeg',altText=''}}', 16='{type=string, value=A side view of grouted rock after the grout injection process aids in evaluation of grout dispersion characteristics within the chamber}', 25='{type=number, value=0}', 27='{type=number, value=1}', 28='{type=number, value=1627657814000}', 29='{type=number, value=10}'}

{id=61570585145, createdAt=1639074811235, updatedAt=1646949456402, path='doe-downstream-fish-passage-american-eel', name='Downstream Passage for Silver American Eel', 1='{type=string, value=Modular and Scalable Downstream Passage for Silver American Eel}', 4='{type=string, value=Read how Alden tested the effects of innovative downstream fish passage technologies with lab, CFD, and field analysis. Funded by the Department of Energy}', 5='{type=list, value=[{id=15, name='Energy', order=0, label='Energy'}, {id=18, name='Water', order=3, label='Water'}]}', 6='{type=list, value=[{id=17, name='Fish Passage', order=16, label='Fish Passage'}, {id=18, name='Fish Protection', order=17, label='Fish Protection'}, {id=30, name='Hydropower', order=29, label='Hydropower'}, {id=31, name='Environmental Engineering', order=30, label='Environmental Engineering'}]}', 7='{type=list, value=[{id=2, name='Numerical Modeling', order=1, label='Numerical Modeling'}, {id=5, name='Desktop Analysis', order=4, label='Desktop Analysis'}, {id=6, name='Field Study', order=5, label='Field Study'}, {id=8, name='Laboratory Testing', order=7, label='Laboratory Testing'}]}', 8='{type=string, value=

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).

 

}', 9='{type=string, value=https://20952198.fs1.hubspotusercontent-na1.net/hubfs/20952198/PROJECTS/ALDEN/DOE-Eel-Passage/Eel_Fish_Passage_2020.mp4?t=1641423507528}', 10='{type=string, value=https://20952198.fs1.hubspotusercontent-na1.net/hubfs/20952198/PROJECTS/ALDEN/DOE-Eel-Passage/Eel_Fish_Passage_Field_Study.mp4?t=1641423504203}', 11='{type=string, value=Evaluation of bypass performance with silver eels happened in both controlled laboratory settings and at a small hydro project to determine the bypass efficiency and behavioral responses, so as to optimize design and operation of the bypass systems.}', 13='{type=image, value=Image{width=1200,height=600,url='https://20952198.fs1.hubspotusercontent-na1.net/hubfs/20952198/PROJECTS/ALDEN/DOE-Eel-Passage/Laboratory-Test-Facility-DOE-Eel-Fish-Passage-Study.jpg',altText=''}}', 14='{type=string, value=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}', 15='{type=image, value=Image{width=1200,height=600,url='https://20952198.fs1.hubspotusercontent-na1.net/hubfs/20952198/PROJECTS/ALDEN/DOE-Eel-Passage/DOE-Eel-Passage-Study-biologist-with-eel.jpg',altText=''}}', 16='{type=string, value=Silver American eels were PIT tagged and measured for length, weight, and eye diameters prior to testing}', 17='{type=image, value=Image{width=1200,height=580,url='https://20952198.fs1.hubspotusercontent-na1.net/hubfs/20952198/PROJECTS/ALDEN/DOE-Eel-Passage/Pathlines-colored-by-velocity-DOE-Eel-Fish-Passage-Study.jpg',altText=''}}', 18='{type=string, value=CFD modeling was performed to model the hydraulic conditions of the lab and field studies}', 19='{type=image, value=Image{width=1200,height=600,url='https://20952198.fs1.hubspotusercontent-na1.net/hubfs/20952198/PROJECTS/ALDEN/DOE-Eel-Passage/Mine-Falls-Field-Installation-DOE-Eel-Passage-Study-1.jpg',altText=''}}', 20='{type=string, value=Field evaluation of biological performance conducted with full-scale bypass systems installed at the intake of a small hydro project}', 21='{type=image, value=Image{width=1200,height=600,url='https://20952198.fs1.hubspotusercontent-na1.net/hubfs/20952198/PROJECTS/ALDEN/DOE-Eel-Passage/Mine-Falls-Hydro-Project-Nashua-NH-DOE-Eel-Passage-Study-Field-Location.jpg',altText=''}}', 22='{type=string, value=Mine Falls Hydroelectric Project, located on the Nashua River in Nashua, New Hamsphire, was chosen as the site for the field evaluation}', 25='{type=number, value=0}', 27='{type=number, value=1}', 28='{type=number, value=0}', 29='{type=number, value=12}', 33='{type=number, value=0}', 34='{type=list, value=[{id=11, name='Natural Resources & Environmental Planning', order=5, label='Natural Resources & Environmental Planning'}]}', 37='{type=list, value=[{id=111, name='Fish Passage Design, Modeling & Testing', order=62, label='Fish Passage Design, Modeling & Testing'}, {id=112, name='Fish Protection Design, Modeling & Testing', order=63, label='Fish Protection Design, Modeling & Testing'}]}', 39='{type=string, value=doe-downstream-fish-passage-american-eel}'}

{id=61570585150, createdAt=1639074811246, updatedAt=1652732050380, path='seabrook-pipe-lining-testing', name='Seabrook Pipe Lining Testing', 1='{type=string, value=Seabrook Pipe Lining Testing}', 33='{type=number, value=0}', 34='{type=list, value=[{id=10, name='Civil Infrastructure', order=4, label='Civil Infrastructure'}]}', 4='{type=string, value=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.}', 5='{type=list, value=[{id=15, name='Energy', order=0, label='Energy'}, {id=18, name='Water', order=3, label='Water'}]}', 37='{type=list, value=[{id=96, name='Hydraulic Structure Engineering Design', order=47, label='Hydraulic Structure Engineering Design'}, {id=97, name='Hydraulic Modeling & Consulting', order=48, label='Hydraulic Modeling & Consulting'}]}', 6='{type=list, value=[{id=1, name='Hydraulic Structures', order=0, label='Hydraulic Structures'}, {id=25, name='Hydraulic Modeling', order=24, label='Hydraulic Modeling'}, {id=27, name='Pipeline Repair', order=26, label='Pipeline Repair'}, {id=28, name='Hydraulic System Maintenance', order=27, label='Hydraulic System Maintenance'}, {id=32, name='Irrigation', order=31, label='Irrigation'}]}', 7='{type=list, value=[{id=1, name='Physical Modeling', order=0, label='Physical Modeling'}, {id=13, name='Hydraulic Engineering and Design', order=12, label='Hydraulic Engineering and Design'}, {id=15, name='Mock-Up Testing', order=14, label='Mock-Up Testing'}]}', 39='{type=string, value=seabrook-pipe-lining-testing}', 8='{type=string, value=

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.

}', 13='{type=image, value=Image{width=1500,height=900,url='https://20952198.fs1.hubspotusercontent-na1.net/hubfs/20952198/PROJECTS/ALDEN/Seabrook-Pipe-Lining-Testing/Seabrook-Lined-Pipes-Lining-Contractor-AquaRehab.jpg',altText=''}}', 14='{type=string, value=Alden constructed a custom flow loop with the provided test piping that was lined onsite by a contractor}', 15='{type=image, value=Image{width=1500,height=900,url='https://20952198.fs1.hubspotusercontent-na1.net/hubfs/20952198/PROJECTS/ALDEN/Seabrook-Pipe-Lining-Testing/Finished-Epoxy-Lined-Pipe-to-Elbow-for-mock-up-testing.jpg',altText=''}}', 16='{type=string, value=Mock-up testing and careful hydraulic analysis provided insight to the viability of CIPP lining at Seabrook}', 25='{type=number, value=0}', 27='{type=number, value=1}', 28='{type=number, value=1633353156000}', 29='{type=number, value=13}'}

{id=109859635311, createdAt=1680794833631, updatedAt=1682517893630, path='scioto-ridge-wind-farm', name='Scioto Ridge Wind Farm', 1='{type=string, value=Scioto Ridge Wind Farm}', 33='{type=number, value=0}', 34='{type=list, value=[{id=8, name='Sustainability', order=2, label='Sustainability'}]}', 35='{type=string, value=RWE Renewables}', 4='{type=string, value=Read how the construction of a 75-turbine onshore wind electric generation facility was supported by Verdantas.}', 36='{type=string, value=Hardin and Logan Counties, Ohio}', 5='{type=list, value=[{id=15, name='Energy', order=0, label='Energy'}]}', 8='{type=string, value=

RWE Renewables, a global energy company, constructed a 75-turbine, 250 MW onshore wind electric generation facility between 2019 and 2021. It went into commercial operation in June 2021. The project includes Siemens Gamesa turbines and is RWE’s first onshore wind project in Ohio. It has the capacity to provide clean energy for more than 60,000 households.

Verdantas was selected to provide civil engineering design, land surveying, ODOT and County roadway permitting, surface water delineations and ecological surveys, SPCC plan preparation, Decommissioning Plan preparation, Ohio EPA construction stormwater permit and Stormwater Pollution prevention Plan (SWP3) preparation, surface water permitting, storm water inspections during construction, and ecological specialist services during construction.

Temporary intersection improvements were designed for turbine blades that were up to 211 feet long and weighed 31,200 pounds. The nacelle units weighed 250,000 pounds. The project study area included approximately 50 square miles (31,986 acres) and required approximately 38 miles of new access roads and approximately 75 miles of electrical collection lines.

}', 13='{type=image, value=Image{width=1600,height=500,url='https://www.verdantas.com/hubfs/Projects/scioto-farms-1.jpeg',altText=''}}', 25='{type=number, value=0}', 27='{type=number, value=0}', 29='{type=number, value=14}', 30='{type=string, value=

Related Content

 

RWE’s U.S. Onshore Wind Farm Scioto Ridge in operation | RWE.com

Scioto Ridge Wind Farm, Ohio | NS Energy

 

 

}'}

{id=62875256355, createdAt=1640876471640, updatedAt=1646949558142, path='gm-baltimore-assembly-plant', name='GM Baltimore Assembly Plant', 1='{type=string, value=GM Baltimore Assembly Plant}', 33='{type=number, value=0}', 4='{type=string, value=Site assessment and redevelopment of former GM Baltimore Assembly Plant}', 36='{type=string, value=Baltimore, MD}', 5='{type=list, value=[{id=16, name='Real Estate', order=1, label='Real Estate'}]}', 38='{type=string, value=Duke Realty Corporation}', 39='{type=string, value=gm-baltimore-assembly-plant}', 8='{type=string, value=

Verdantas partnered with Duke Realty Corporation to redevelop the Former GM Baltimore Assembly Plant.

The site housed GM automobile assembly operations from 1936 to 2005.  Duke Baltimore LLC, an affiliate of Duke Realty Corporation, purchased the site from GM in January 2006.  Prior to the property purchase, Verdantas provided risk evaluation and cost estimating services to Duke to aid an evaluation of potential environmental-related costs that may ultimately be incurred during remediation and redevelopment of the site.

Verdantas coordinated Resource Conservation and Recovery Act (RCRA) corrective action activities at the site as part of a Facility Lead Agreement administered by U.S. EPA Region 3 and parallel assessment activities as part of the State of Maryland’s Voluntary Cleanup Program administered by the Maryland Department of the Environment.  This project represents the first time a brownfield was assessed and redeveloped through both programs concurrently.

Additionally, Verdantas designed the assessment activities and ultimate remedial approach to incorporate redevelopment tools such as engineering controls to cost-effectively remediate the site, while maintaining protection of human health and the environment.  Verdantas also assisted the client with the development of bid specifications for demolition of on-site buildings and structures, and served as the client’s onsite representative providing oversight of demolition activities.

}', 25='{type=number, value=1}', 27='{type=number, value=0}', 13='{type=image, value=Image{width=512,height=321,url='https://f.hubspotusercontent40.net/hubfs/20952198/IMAGES/PROJECTS/Baltimore-GM.png',altText=''}}'}

{id=109267454228, createdAt=1680528958462, updatedAt=1680628275424, path='waterfront-industrial-remediation', name='Waterfront-Industrial-Site-Remediation', 1='{type=string, value=Waterfront Industrial Site Remediation | Kearny, NJ}', 33='{type=number, value=1}', 34='{type=list, value=[{id=6, name='Environmental Assessment & Remediation', order=0, label='Environmental Assessment & Remediation'}]}', 35='{type=string, value=Industrial Property}', 4='{type=string, value=Read how a comprehensive remediation plan lead to a successful redevelopment for a waterfront industrial site}', 36='{type=string, value=Kearny, New Jersey}', 5='{type=list, value=[{id=16, name='Real Estate', order=1, label='Real Estate'}, {id=17, name='Industrial', order=2, label='Industrial'}]}', 37='{type=list, value=[{id=51, name='Remediation', order=2, label='Remediation'}]}', 8='{type=string, value=

Experts from our Somerville, New Jersey office serve as LSRP's on a waterfront historic fill site. The site was operated as a shipyard, naval yard, and ship decommissioning facility from the early 1900s through the 1980s, when it was developed as a multi-tenant industrial park. The property owner voluntarily requested an environmental review and clearance of the property during redevelopment.

A comprehensive investigation was completed including a Preliminary Assessment, Site Investigation, Remedial Investigation, Remedial Action Workplan, and Remedial Action Report. Several areas of concern requiring remediation were identified and excavated. Ground water was investigated, but did not require remediation. Site-wide historic fill evaluation was required to support import of alternative fill material. More than one hundred soil borings were installed and samples were collected to develop a statistically-robust alternative fill acceptance criteria. The fill acceptance criteria was approved by the New Jersey Department of Environmental Protection (NJDEP), and approximately 250,000 cubic yards of alternative fill were imported to support redevelopment. Our staff were key partners during redevelopment. Our role included quickly and carefully vetting potential fill sources, monitoring fill placement, advising on health and safety concerns, and supporting the construction team.

The property was successfully redeveloped for continued industrial usage, which required the successful navigation of a complex termination of a Declaration of Environmental Restrictions for several properties, and refiled a deed notice for the redevelopment site. The NJDEP issued a Soil Remedial Action Permit for the Site, and the Response Action Outcome was issued.

}', 13='{type=image, value=Image{width=1001,height=751,url='https://www.verdantas.com/hubfs/Projects/Kearny-NJ-Industrial-Remediation-Cap-Inspection.jpg',altText=''}}', 14='{type=string, value=A waterfront industrial property was successfully redeveloped for continued industrial usage}', 16='{type=string, value=A waterfront industrial property was successfully redeveloped for continued industrial usage}', 25='{type=number, value=0}', 27='{type=number, value=0}', 29='{type=number, value=6}'}

{id=109267454247, createdAt=1680530340495, updatedAt=1682517888403, path='brownfield-redevelopement-avenel-nj', name='ISRA Brownfields Redevelopment', 1='{type=string, value=ISRA Brownfield Redevelopment | Avenel, NJ}', 33='{type=number, value=1}', 34='{type=list, value=[{id=6, name='Environmental Assessment & Remediation', order=0, label='Environmental Assessment & Remediation'}]}', 35='{type=string, value=Commercial Warehousing}', 4='{type=string, value=Read how ISRA requirements were addressed for redevelopment of a former manufacturing plant into commercial warehousing}', 36='{type=string, value=Avenel, NJ}', 5='{type=list, value=[{id=16, name='Real Estate', order=1, label='Real Estate'}, {id=17, name='Industrial', order=2, label='Industrial'}]}', 37='{type=list, value=[{id=50, name='Risk Assessment', order=1, label='Risk Assessment'}, {id=51, name='Remediation', order=2, label='Remediation'}]}', 8='{type=string, value=

Verdantas was retained to address the requirements of the Industrial Site Recovery Act (ISRA) for the redevelopment of a former manufacturing plant with more than 100 years of industrial history in Avenel, New Jersey into commercial warehousing.

Verdantas prepared the necessary ISRA documents, including the General Information Notice to notify NJDEP of the sale of the property. The Preliminary Assessment by Verdantas identified over sixty areas of concern and recommended investigation of more than fifty areas, including underground and aboveground storage tanks, floor drains, chemical storage areas, electrical transformers, buried process materials, ground water contamination, and ecologically sensitive natural resources. The investigation included inspections of the manufacturing facility and surrounding land, soil borings, test pits, monitoring well installation and sampling, building material sampling, and an ecological risk assessment. Once the initial investigation of these areas was complete, Verdantas oversaw the demolition of the former facility to ensure compliance with the erosion control plan to prevent migration of site-related contaminants. Verdantas coordinated the site activities with US EPA to modify an existing Self-Implementing Cleanup and Disposal Plan (SIP) to facilitate the redevelopment.

At the conclusion of the demolition, Verdantas completed the delineation of the contaminated areas of concern and directed the remediation of these impacted areas. Delineation included negotiating access to six off-site properties, including privately and publicly held land. As part of redevelopment, Verdantas also designed and oversaw the installation of a sub-slab depressurization system under the new building and directed capping of the Site in accordance with the US EPA-approved SIP. Verdantas coordinated the testing and movement of excess soils generated during grading for reuse on-site, reuse off-site as alternative fill, and disposal as required.

Based on Verdantas’ track record of success conducting remediation on the Site, the client continues to retain Verdantas for environmental services across the country.

}', 13='{type=image, value=Image{width=4032,height=3024,url='https://www.verdantas.com/hubfs/Projects/Avenel-NJ-Brownfield/demolition-oversight-avenel-nj-brownfield-redevelopment.jpg',altText=''}}', 14='{type=string, value=Demolition oversight was provided to ensure runoff of potential contaminants was mitigated.}', 15='{type=image, value=Image{width=1500,height=1125,url='https://www.verdantas.com/hubfs/Projects/Avenel-NJ-Brownfield/building-materials-sampling-avenel-nj-brownfield-redevelopment.jpg',altText=''}}', 16='{type=string, value=Building materials were sampled to determine the potential reuse as backfill on site.}', 17='{type=image, value=Image{width=1500,height=1125,url='https://www.verdantas.com/hubfs/Projects/Avenel-NJ-Brownfield/ground-water-sampling-avenel-nj-brownfield-redevelopment.jpg',altText=''}}', 18='{type=string, value=In-situ ground water data was collected to monitoring potential impacts to surrounding receptors.}', 19='{type=image, value=Image{width=1125,height=1500,url='https://www.verdantas.com/hubfs/Projects/Avenel-NJ-Brownfield/underground-storage-tanks-remediated-avenel-nj-brownfield.jpeg',altText=''}}', 20='{type=string, value=Several areas of concern were remediated, including underground storage tanks.}', 21='{type=image, value=Image{width=1500,height=1125,url='https://www.verdantas.com/hubfs/Projects/Avenel-NJ-Brownfield/vapor-intrusion-installed-avenel-nj-brownfrield-redevelopment.jpg',altText=''}}', 22='{type=string, value=A sub-slab depressurization system and vapor barrier were installed as a preventative measure against potential future vapor intrusion.}', 23='{type=image, value=Image{width=1500,height=1125,url='https://www.verdantas.com/hubfs/Projects/Avenel-NJ-Brownfield/caps-installed-avenel-nj-brownfield-remediation.jpg',altText=''}}', 24='{type=string, value= Caps were installed in accordance with the EPA SIP.}', 25='{type=number, value=0}', 27='{type=number, value=0}', 29='{type=number, value=7}'}

{id=62875256391, createdAt=1640877859249, updatedAt=1667487640360, path='brownfields-redevelopment', name='Brownfields Redevelopment - Stony Creek Brewery', 1='{type=string, value=Brownfields Redevelopment - Stony Creek Brewery}', 33='{type=number, value=0}', 34='{type=list, value=[{id=6, name='Environmental Assessment & Remediation', order=0, label='Environmental Assessment & Remediation'}]}', 35='{type=string, value=Land Development/Brownfields}', 4='{type=string, value=Using a deep understanding of area geology, our team recommended proper design and foundation support for building construction at this brownfield site}', 36='{type=string, value=Bradford, CT}', 5='{type=list, value=[{id=16, name='Real Estate', order=1, label='Real Estate'}]}', 37='{type=list, value=[{id=49, name='Site Assessment', order=0, label='Site Assessment'}, {id=51, name='Remediation', order=2, label='Remediation'}, {id=83, name='Site Engineering', order=34, label='Site Engineering'}, {id=114, name='Geotechnical Engineering', order=65, label='Geotechnical Engineering'}]}', 39='{type=string, value=brownfields-redevelopment}', 8='{type=string, value=

Our team performed a geotechnical assessment for the construction of the Stony Creek Brewery.  The building was constructed along the shoreline of the Branford River on a Brownfields site. Our deep understanding of the geology of the area resulted in our recommended design of steel H pile foundations to support the new building above a miscellaneous fill layer and an organic marsh deposit that was underlain by glacial till and bedrock.  Our team also optimized the pile size for maximized load capacity, resulting in minimized cost for construction.

Achievements

CONSTRUCTION OVERSIGHT AND TESTING –Oversight of the steel H pile installations  was provided, along with additional geotechnical evaluations to assess changes to the project that occurred during construction.  Our staff performed evaluation of dynamic pile load tests to verify the design pile load capacities and assessed the suitability of pile driving hammer energy with respect to allowable pile stresses (i.e., the likelihood of the piles being damaged by the hammer during installation).  Based upon the test results, our experts confirmed that our pile design was acceptable for construction of the project and verified the efficiency and cost effectiveness of the selected steel H pile size. 

Our team performed oversight of the pile installation and assisted the contractor with production efficiency and minimizing pile material waste.  Installation of each pile was documented for consistency with the project specifications, and communicated this field documentation with local regulators, as required.

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{id=62156370456, createdAt=1639765592988, updatedAt=1680629535728, path='port-of-wilmington-multi-disciplined-projects', name='Port of Wilmington Multi-Disciplined Projects', 1='{type=string, value=Port of Wilmington Multi-Disciplined Projects}', 33='{type=number, value=0}', 34='{type=list, value=[{id=6, name='Environmental Assessment & Remediation', order=0, label='Environmental Assessment & Remediation'}, {id=10, name='Civil Infrastructure', order=4, label='Civil Infrastructure'}]}', 35='{type=string, value=Diamond State Port Corporation}', 4='{type=string, value=Extensive environmental, civil, geotechnical, marine, and materials testing engineering services for projects at the Port of Wilmington.}', 36='{type=string, value=Wilmington, Delaware}', 5='{type=list, value=[{id=17, name='Industrial', order=2, label='Industrial'}, {id=19, name='Government', order=4, label='Government'}, {id=20, name='Transportation', order=5, label='Transportation'}]}', 37='{type=list, value=[{id=87, name='Construction Services', order=38, label='Construction Services'}, {id=89, name='Coastal Engineering', order=40, label='Coastal Engineering'}, {id=92, name='Laboratory Testing', order=43, label='Laboratory Testing'}, {id=93, name='Calibration Testing', order=44, label='Calibration Testing'}, {id=114, name='Geotechnical Engineering', order=65, label='Geotechnical Engineering'}]}', 39='{type=string, value=port-of-wilmington-multi-disciplined-projects}', 8='{type=string, value=

For over 40 years, our experts have 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 our team for support.

Over the years, our staff 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, our rich history of institutional knowledge at the site, enabled the Port to continue its successful work as an economic driver.

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{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, label='Civil Infrastructure'}]}', 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, label='Industrial'}]}', 37='{type=list, value=[{id=83, name='Site Engineering', order=34, label='Site Engineering'}]}', 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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{id=107714253069, createdAt=1679596186020, updatedAt=1679596918546, path='service-energy-spcc-plan', name='Service Energy SPCC Plan Development', 1='{type=string, value=Service Energy SPCC Plan Development}', 33='{type=number, value=1}', 34='{type=list, value=[{id=7, name='Environmental Health & Safety', order=1, label='Environmental Health & Safety'}]}', 35='{type=string, value=Service Energy}', 4='{type=string, value=Read how Verdantas developed easy to use and practical SPCC plans to comply with 40 CFR 112}', 36='{type=string, value=Dover, Milford, and Lewes, Delaware}', 5='{type=list, value=[{id=17, name='Industrial', order=2, label='Industrial'}]}', 37='{type=list, value=[{id=115, name='Oil Spill Prevention', order=66, label='Oil Spill Prevention'}]}', 8='{type=string, value=

Verdantas was selected to prepare Spill Prevention, Control and Countermeasure (SPCC) plans for Service Energy facilities in Dover, Milford, and Lewes, Delaware. The goal of the effort was to develop SPCC plans that would not only be compliant with 40 CFR 112, but also be easy to use and practical to implement.

Having prepared hundreds of SPCC plans in EPA Region 3, Verdantas had a history collaborating with EPA on similar projects. With confidence that our product would pass regulatory scrutiny, Verdantas proceeded to conduct site visits to obtain the information needed to develop plans for each of the sites. Site visits took approximately 1.5 hours to complete (typically between 1 and 3 hours are needed, depending on the complexity of the site). Following the site visits, information collected was carefully transformed into accurate, workable documents. Our client was given an opportunity to review draft documents before final plans, signed and sealed by a registered Professional Engineer (PE), were available for use.

The Verdantas team brings decades of superior experience with navigating compliance requirements related to oil pollution prevention. From federal Spill Prevention, Control and Countermeasure (SPCC) requirements to federal Facility Response Plan (FRP) requirements to individual state programs, our team has established career- long relationships with the regulators who implement these programs. This familiarity yields compliance success for our clients.

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{id=108534375495, createdAt=1680024059477, updatedAt=1680025594090, path='semiconductor-facility-program-management', name='Semiconductor-Facility-Program-Management', 1='{type=string, value=Facility Program Management Support–Semiconductor Industry}', 33='{type=number, value=0}', 34='{type=list, value=[{id=7, name='Environmental Health & Safety', order=1, label='Environmental Health & Safety'}]}', 35='{type=string, value=Semiconductor Manufacturing Facility}', 4='{type=string, value=Read how Verdantas offers on-going health and safety program support for a Semiconductor client}', 36='{type=string, value=New Hampshire}', 5='{type=list, value=[{id=17, name='Industrial', order=2, label='Industrial'}]}', 37='{type=list, value=[{id=116, name='Health and Safety Compliance Management', order=67, label='Health and Safety Compliance Management'}]}', 8='{type=string, value=

Verdantas offers on-going support to a semiconductor manufacturing facility located in southern New Hampshire.  This facility manufactures gallium arsenide wafers using a Metal-Organic Chemical Vapor Deposition (MOCVD) process.  Due to the laboratory-style operations and hazardous gases and liquids involved, the facility requires on-going safety program management and staff involvement.

Employee Safety Committee

Verdantas leads the facility’s monthly safety committee meetings.  Once per month, a selection of employees from upper managers to lab workers meet to discuss on-going safety needs and events.  These meetings incorporate the review of near-miss reports, anticipated future events, and scheduling regular tasks such as facility safety walk-throughs and training.  Quarterly, the team develops a report of safety events reviewed by the committee, which is distributed to all employees in the facility.  Verdantas uses their combined experience to guide and direct the safety committee while allowing the attending members to exercise their agency in directing facility safety programs.

Employee Training

Verdantas provides both live training services to facility employees, as well as assisting facility staff in developing and presenting their own training classes.  It is Verdantas’ approach to empower clients to manage and develop programs as much as possible to bolster facility staff engagement and develop positive long-term corporate environmental health and safety (EHS) habits.

Company Program Development

Verdantas offers ongoing support to assist the facility in developing internal safety programs, such as chemical spill response, lockout-tagout, facility safety inspections, and new chemical review forms / change management procedures.  As with training, the goal is help prop up the facility’s programs currently in a manner allowing the facility to continue managing them in the future themselves as much as possible.

 

 

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{id=62156370458, createdAt=1639766017807, updatedAt=1646949543056, path='washington-street-flood-mitigation', name='Washington Street Flood Mitigation', 1='{type=string, value=Washington Street Flood Mitigation}', 33='{type=number, value=0}', 34='{type=list, value=[{id=10, name='Civil Infrastructure', order=4, label='Civil Infrastructure'}]}', 35='{type=string, value=City of Delaware City}', 4='{type=string, value=Planning, design, funding acquisition, permitting and construction review of interdependent stormwater system improvements for the City’s flood mitigation project}', 36='{type=string, value=Delaware City, DE}', 5='{type=list, value=[{id=18, name='Water', order=3, label='Water'}, {id=19, name='Government', order=4, label='Government'}]}', 37='{type=list, value=[{id=89, name='Coastal Engineering', order=40, label='Coastal Engineering'}, {id=90, name='Water & Wastewater Design', order=41, label='Water & Wastewater Design'}]}', 39='{type=string, value=washington-street-flood-mitigation}', 8='{type=string, value=

Delaware City faces the threat of flooding from intense rainfall combined with high tidal surge.  Verdantas managed the planning, design, funding acquisition, permitting and construction review of interdependent stormwater system improvements for the City’s flood mitigation project.  The project included replacing and extending an existing stormwater outfall, underground piping conveyance and storage improvements and an 18,000 gpm stormwater pumping station to mitigate chronic flooding.  The City now maintains a robust, automated collection and pumping system to mitigate flooding in its downtown historic area.

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{id=62877829790, createdAt=1640878956493, updatedAt=1677791531713, path='penn-7-cdf-wetlands-restoration', name='Penn 7 CDF Wetlands Restoration', 1='{type=string, value=Penn 7 CDF Wetlands Restoration}', 4='{type=string, value=Learn how the City of Toledo, Ohio used available grants to restore a former confined disposal facility to improve water quality and ecosystem health}', 5='{type=list, value=[{id=18, name='Water', order=3, label='Water'}, {id=19, name='Government', order=4, label='Government'}]}', 8='{type=string, value=

The lower Maumee River hosts the largest fish spawning migrations of any Great Lakes tributary. Floodplain wetland habitat is essential for healthy fish communities and for wildlife that depend on wetlands at some point during their life cycle. Floodplain wetland habitat on the lower Maumee River is almost non-existent due to filling, channelization, and shoreline hardening activities completed over the last century, including at the Penn 7 former confined disposal facility (CDF) where dredged materials from the Maumee River shipping channel were placed in the late 1960s – early 1970s.

To explore the opportunity to create wetland and improved fish and wildlife habitat at the Penn 7 CDF located along the Maumee River near its mouth into Lake Erie, the City of Toledo received a Great Lakes Restoration Initiative (GLRI) grant from the National Oceanic and Atmospheric Administration (NOAA). This grant funded site characterization activities and a feasibility study to determine the restoration potential of Penn 7. Working closely with the City and involved agencies, Verdantas helped prepare the successful NOAA grant application and was later contracted with the City to complete the feasibility study. The study resulted in the determination that the historically placed sediment in the CDF were no more impacted than the surrounding Maumee River sediments and that the property was suitable for restoration.

The City subsequently received GLRI funding through the NOAA-Great Lakes Commission Regional Habitat Partnership for final engineering, design, permitting, construction, and public involvement activities. The GLRI program funds were dedicated to this project as part of the Maumee AOC Management Action Project to address the Wildlife Beneficial Use Impairment. The City contracted with Verdantas and Geo. Gradel Co. to complete these activities. The engaged project management team also included Ohio EPA and the ODNR Division of Wildlife. Plans were finalized in summer 2020 and primary construction activities were finished in summer 2021.

Work Completed

To connect the upstream portion of the site with the Maumee River, a water control and fish passage structure was installed within the existing CDF dike. To allow river water to flow to and through the new wetland habitat, sediment was excavated and recontoured in the upstream portion of the site. A channel was excavated to connect the new upstream wetland to the downstream end of the property where an existing embayment is located. To protect/enhance the embayment, a dike with a water control and fish passage structure was installed between it and the Maumee River.

This project created approximately 9.5 acres of submerged and emergent wetlands on the former CDF, 8.5 acres of protected coastal wetlands/open water habitat in the embayment, and 20+ acres of improved upland habitat. This property is expected to be a productive spawning and nursery site for Lake Erie and Maumee River fish and provide quality benthic and wildlife habitat while reducing suspended sediments/nutrient concentrations of river water flowing into the restored habitat. Our work also included significant community and stakeholder outreach activities.

For more information on this project, please view this video: Maumee River Habitat Restoration Project at Penn 7 - YouTube

 

Or Visit: Maumee River - Great Lakes Commission (glc.org) and Home - Maumee AOC Area of Concern.

}', 13='{type=image, value=Image{width=1600,height=819,url='https://www.verdantas.com/hubfs/Projects/Penn7/Photo%206%20-%20Restoration%20Post-Construction-1.jpeg',altText=''}}', 14='{type=string, value=The project improved habitat for fish and wildlife by creating coastal wetlands and forested area along the Maumee River. This urban nature space will improve water quality and ecosystem health while promoting eco-tourism, birding, and fishing.}', 15='{type=image, value=Image{width=922,height=691,url='https://www.verdantas.com/hubfs/Projects/Penn7/Photo%201%20Pre-Construction.jpg',altText=''}}', 16='{type=string, value=The 59-acre Penn 7 property along the Maumee River is a former confined disposal facility that accepted dredged material from the Maumee River shipping channel until the 1970s. This section of the river has miles of hardened shorelines and Penn 7 had low quality wetlands that were isolated from the river.}', 17='{type=image, value=Image{width=4032,height=3024,url='https://www.verdantas.com/hubfs/Projects/Penn7/Photo%204%20-%20Embayment%20Construction.jpg',altText=''}}', 18='{type=string, value=A Great Lakes Restoration Initiative award through NOAA and the Great Lakes Commission Regional Partnership restored seven acres of coastal wetland habitat, created eight acres of embayment area, added 1,000 feet of fish passage channel, and incorporated 15 acres of native plantings.}', 19='{type=image, value=Image{width=836,height=627,url='https://www.verdantas.com/hubfs/Projects/Penn7/Photo%203%20-%20Channel%20Construction.jpg',altText=''}}', 20='{type=string, value=A modified channel connects the new wetland to created habitat features within the enhanced embayment area. A new water control structure within the existing dike connects the site to the Maumee River and provides fish passage. Excavation and recontouring of dredged sediments allow river water to flow through the new wetland habitat.}', 21='{type=image, value=Image{width=836,height=627,url='https://www.verdantas.com/hubfs/Projects/Penn7/Wetland%202.jpg',altText=''}}', 22='{type=string, value=Restoration provides quality spawning and nursery space for over 40 species of Lake Erie fish as well as quality habitat for native birds, amphibians, reptiles, mammals, and river bottom communities.}', 23='{type=image, value=Image{width=1600,height=1200,url='https://www.verdantas.com/hubfs/Projects/Penn7/Photo%205%20-%20Dike%20Construction-1.jpg',altText=''}}', 24='{type=string, value=Managing client and agency input and expectations including NOAA, U.S. EPA Region 5, USGS, Ohio EPA, ODNR Division of Wildlife, and others added to project complexity. A robust community outreach program kept stakeholders engaged.}', 25='{type=number, value=0}', 27='{type=number, value=0}', 29='{type=number, value=1}', 30='{type=string, value=

Related Links

Great Lakes Commission video highlights restoration of Maumee River site | glc.org

 

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{id=61570585149, createdAt=1639074811244, updatedAt=1646949464614, path='poudre-river-drop-structure', name='Poudre River Drop Structure Replacement', 1='{type=string, value=Poudre River Drop Structure Replacement }', 4='{type=string, value=Alden provided structural and hydraulic engineering and CFD modeling to replace the Poudre River drop structure with a stepped spillway and stilling basin.}', 5='{type=list, value=[{id=18, name='Water', order=3, label='Water'}]}', 6='{type=list, value=[{id=1, name='Hydraulic Structures', order=0, label='Hydraulic Structures'}, {id=9, name='Water Conveyance', order=8, label='Water Conveyance'}, {id=16, name='Structural Engineering', order=15, label='Structural Engineering'}, {id=25, name='Hydraulic Modeling', order=24, label='Hydraulic Modeling'}, {id=32, name='Irrigation', order=31, label='Irrigation'}]}', 7='{type=list, value=[{id=2, name='Numerical Modeling', order=1, label='Numerical Modeling'}, {id=4, name='Design', order=3, label='Design'}, {id=10, name='Construction Services', order=9, label='Construction Services'}, {id=13, name='Hydraulic Engineering and Design', order=12, label='Hydraulic Engineering and Design'}, {id=14, name='Structural Engineering and Design', order=13, label='Structural Engineering and Design'}]}', 8='{type=string, value=

Alden was retained by the Northern Water Conservancy District (Northern Water) for the Hansen Supply Canal Poudre River Drop Structure Replacement Project. Alden was the prime consultant for the Project and provided complete structural and hydraulic engineering services, including hydraulic modeling for the design of the replacement drop structure and overall site improvements. The new structure included a stepped spillway, stilling basin, and retaining walls.

Alden performed Computational Fluid Dynamics (CFD) modeling of the existing structure and the proposed structure. The new structure is designed for a peak discharge of 1,500 cfs. Alden also performed 3D finite element modeling for the structural design. Alden collaborated with Northern Water staff to identify maintenance needs and preferences for the new structure. The stilling basin includes an access bridge, jib cranes, and stoplogs to isolate the structure for future maintenance and inspections. The existing site featured extremely steep slopes at 1V:1H with poor surface drainage. The final grading established stable slopes and improved surface drainage to keep water away from the new structure.

Details of the project included:

• Concrete structure demolition, removal, and repair
• New concrete stepped spillway, concrete stilling basin, and concrete retaining walls
• Foot bridge with access stairs
• Subsurface drain system and surface drainage improvements
• Temporary construction cofferdam and dewatering
• Site grading and access road
• Trapezoidal channel restoration and riprap sizing

The project also required coordination regarding the environmental impacts to the Preble's mouse habitat and an adjacent eagle's nest. Design was completed in July 2019. Construction was completed in March 2020 with the first water flowing through the structure on April 1, 2020. 

}', 13='{type=image, value=Image{width=1200,height=675,url='https://20952198.fs1.hubspotusercontent-na1.net/hubfs/20952198/PROJECTS/ALDEN/Poudre-River-Drop-Structure/Poudre-New-Construction-Structure-After-2.jpeg',altText=''}}', 14='{type=string, value=The newly constructed Poudre River Drop Structure along the Hansen Supply Canal}', 15='{type=image, value=Image{width=1200,height=675,url='https://20952198.fs1.hubspotusercontent-na1.net/hubfs/20952198/PROJECTS/ALDEN/Poudre-River-Drop-Structure/site-improvements-for-new-drop-structure-poudre-river-structure-project.jpg',altText=''}}', 16='{type=string, value=Site improvements for the new Poudre River Drop Structure Project}', 17='{type=image, value=Image{width=3420,height=1869,url='https://20952198.fs1.hubspotusercontent-na1.net/hubfs/20952198/PROJECTS/ALDEN/Poudre-River-Drop-Structure/Poudre-Existing-Structure-Before.jpg',altText=''}}', 18='{type=string, value=The original Poudre River Drop Structure}', 19='{type=image, value=Image{width=720,height=487,url='https://20952198.fs1.hubspotusercontent-na1.net/hubfs/20952198/PROJECTS/ALDEN/Poudre-River-Drop-Structure/Poudre-Original-Structure-and-Site-Prior-New-Construction.jpg',altText=''}}', 20='{type=string, value=The existing site featured extremely steep slopes with poor surface drainage}', 21='{type=image, value=Image{width=1200,height=675,url='https://20952198.fs1.hubspotusercontent-na1.net/hubfs/20952198/PROJECTS/ALDEN/Poudre-River-Drop-Structure/Poudre-River-Drop-Structure-CFD-Modeling.jpg',altText=''}}', 22='{type=string, value=Alden performed CFD modeling of the existing and proposed structures}', 23='{type=image, value=Image{width=840,height=473,url='https://20952198.fs1.hubspotusercontent-na1.net/hubfs/20952198/PROJECTS/ALDEN/Poudre-River-Drop-Structure/Concrete-Placement-During-Periodic-Inspection-Visits-Poudre-River-Drop-Structure.jpg',altText=''}}', 24='{type=string, value=In addition to preparing design drawings and technical specifications, Alden also provided engineering services during construction}', 25='{type=number, value=0}', 27='{type=number, value=1}', 28='{type=number, value=0}', 29='{type=number, value=9}', 30='{type=string, value=

2020 H2O Project Award

• Design Team – Alden and geotechnical subconsultant, Lithos Engineering
• Client – Northern Water 
• Contractor - Zak Dirt

 

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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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For over 40 years, our experts have 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 our team for support.

Over the years, our staff 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, our rich history of institutional knowledge at the site, enabled the Port to continue its successful work as an economic driver.

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Mandated to eliminate wastewater stream discharge for compliance with the Inland Bays Total Maximum Daily Load, The Town of Millsboro embraced an innovative solution based on recycling, rather than disposal, of high quality treated effluent. The recycled water is used to recharge the local aquifer through seven rapid infiltration basins (RIBS).  With a capacity of 1.2 MGD, Millsboro’s RIBs are the largest municipal system in Delaware.  RIB systems require less land and have lower long term operating costs than wastewater disposal systems using irrigation.  Hydrogeological testing has demonstrated that the performance of Millsboro’s RIB system exceeds the original design criteria.

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Delaware City faces the threat of flooding from intense rainfall combined with high tidal surge.  Verdantas managed the planning, design, funding acquisition, permitting and construction review of interdependent stormwater system improvements for the City’s flood mitigation project.  The project included replacing and extending an existing stormwater outfall, underground piping conveyance and storage improvements and an 18,000 gpm stormwater pumping station to mitigate chronic flooding.  The City now maintains a robust, automated collection and pumping system to mitigate flooding in its downtown historic area.

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The lower Maumee River hosts the largest fish spawning migrations of any Great Lakes tributary. Floodplain wetland habitat is essential for healthy fish communities and for wildlife that depend on wetlands at some point during their life cycle. Floodplain wetland habitat on the lower Maumee River is almost non-existent due to filling, channelization, and shoreline hardening activities completed over the last century, including at the Penn 7 former confined disposal facility (CDF) where dredged materials from the Maumee River shipping channel were placed in the late 1960s – early 1970s.

To explore the opportunity to create wetland and improved fish and wildlife habitat at the Penn 7 CDF located along the Maumee River near its mouth into Lake Erie, the City of Toledo received a Great Lakes Restoration Initiative (GLRI) grant from the National Oceanic and Atmospheric Administration (NOAA). This grant funded site characterization activities and a feasibility study to determine the restoration potential of Penn 7. Working closely with the City and involved agencies, Verdantas helped prepare the successful NOAA grant application and was later contracted with the City to complete the feasibility study. The study resulted in the determination that the historically placed sediment in the CDF were no more impacted than the surrounding Maumee River sediments and that the property was suitable for restoration.

The City subsequently received GLRI funding through the NOAA-Great Lakes Commission Regional Habitat Partnership for final engineering, design, permitting, construction, and public involvement activities. The GLRI program funds were dedicated to this project as part of the Maumee AOC Management Action Project to address the Wildlife Beneficial Use Impairment. The City contracted with Verdantas and Geo. Gradel Co. to complete these activities. The engaged project management team also included Ohio EPA and the ODNR Division of Wildlife. Plans were finalized in summer 2020 and primary construction activities were finished in summer 2021.

Work Completed

To connect the upstream portion of the site with the Maumee River, a water control and fish passage structure was installed within the existing CDF dike. To allow river water to flow to and through the new wetland habitat, sediment was excavated and recontoured in the upstream portion of the site. A channel was excavated to connect the new upstream wetland to the downstream end of the property where an existing embayment is located. To protect/enhance the embayment, a dike with a water control and fish passage structure was installed between it and the Maumee River.

This project created approximately 9.5 acres of submerged and emergent wetlands on the former CDF, 8.5 acres of protected coastal wetlands/open water habitat in the embayment, and 20+ acres of improved upland habitat. This property is expected to be a productive spawning and nursery site for Lake Erie and Maumee River fish and provide quality benthic and wildlife habitat while reducing suspended sediments/nutrient concentrations of river water flowing into the restored habitat. Our work also included significant community and stakeholder outreach activities.

For more information on this project, please view this video: Maumee River Habitat Restoration Project at Penn 7 - YouTube

 

Or Visit: Maumee River - Great Lakes Commission (glc.org) and Home - Maumee AOC Area of Concern.

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Related Links

Great Lakes Commission video highlights restoration of Maumee River site | glc.org

 

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For over 40 years, our experts have 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 our team for support.

Over the years, our staff 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, our 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',altText=''}}', 25='{type=number, value=1}', 27='{type=number, value=0}'}

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The South Valley Parkway Project has provided a solution to concerns of residents along Middle Road regarding the compromised vehicular and pedestrian safety along this narrow corridor due to significant increase in traffic over the years.

The overall project is comprised of a new roadway alignment totaling 2.5 miles, one split interchange, five single lane roundabouts and one double lane roundabout to the South Valley Region in lower Luzerne County, PA. The project included the construction of a six-span two-lane bridge, carrying the parkway over Nanticoke Creek, Dundee Road and State Route 29, a single span two-lane bridge, carrying Main Street over State Route 29, and seventeen stormwater management basins which facilitated the separation of onsite stormwater and offsite watercourses to the highest standard. Safety and traffic congestion were the driving forces for PennDOT Engineering District 4-0’s purpose and need to move forward with the project. In addition, the project utilized what was otherwise abandoned coal land and transformed it into a viable traffic calming solution for the surrounding community. The new parkway connects Hanover Township with the City of Nanticoke, alleviating congestion to the residents along State Route 2008 (Middle Road) due to the commuters to Luzerne County Community College Campus and now restricted truck traffic.

Our team was the prime design consultant for this project completing Preliminary Engineering, Final Design, and Consultation during construction on behalf of the project owner PennDOT Engineering District 4-0.

 

Project Features:

• Selecting alignment of 2.5-mile new roadway while minimizing impacts and cost containment to fall within allotted funding.
• Excavation = 1.4M cubic yards, Rock blasting
• Six (6) Roundabouts - Five (5) Single Lane, and One (1) Double Lane
• Six (6) Span Concrete Bridge, One (1) Single-Span Concrete Bridge
• One (1) Box Culvert
• Four (4) Rock Structure Habitat created for Eastern Small-Footed Myotis Bats
• Seventeen (17) Storm Water Management Basins
• (2) Utility Main Relocations
• Acid Bearing Rock (ABR) – rock containing the sulfide-bearing mineral pyrite represents a potential source of Acid Rock Drainage (ARD). As a result, the construction specification required to minimize exposure to air and water without being covered to 5 days, and required an ABR disposal at the project’s approved waste site.

}', 13='{type=image, value=Image{width=1600,height=1199,url='https://www.verdantas.com/hubfs/Projects/South-Valley/South-valley-parkway-3.jpg',altText=''}}', 15='{type=image, value=Image{width=1600,height=1200,url='https://www.verdantas.com/hubfs/Projects/South-Valley/South-valley-parkway.jpg',altText=''}}', 17='{type=image, value=Image{width=1600,height=1067,url='https://www.verdantas.com/hubfs/Projects/South-Valley/South-valley-parkway-2.jpg',altText=''}}', 25='{type=number, value=0}', 27='{type=number, value=0}', 29='{type=number, value=1}'}

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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

• South Station Air Rights Project
• What to know about the big South Station tower project — and how it will affect your commute [boston.com]

 

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{id=61650352136, createdAt=1639159247037, updatedAt=1682343222861, path='wilmington-transit-center', name='Wilmington Transit Center', 1='{type=string, value=Wilmington Transit Center}', 33='{type=number, value=0}', 34='{type=list, value=[{id=6, name='Environmental Assessment & Remediation', order=0, label='Environmental Assessment & Remediation'}, {id=10, name='Civil Infrastructure', order=4, label='Civil Infrastructure'}]}', 35='{type=string, value=Transit Center, LLC}', 4='{type=string, value=Multi-disciplined design and construction support of a multi-purpose transit facility}', 36='{type=string, value=Wilmington, DE}', 5='{type=list, value=[{id=16, name='Real Estate', order=1, label='Real Estate'}, {id=19, name='Government', order=4, label='Government'}, {id=20, name='Transportation', order=5, label='Transportation'}]}', 37='{type=list, value=[{id=49, name='Site Assessment', order=0, label='Site Assessment'}, {id=51, name='Remediation', order=2, label='Remediation'}, {id=83, name='Site Engineering', order=34, label='Site Engineering'}, {id=84, name='Transportation Civil Design', order=35, label='Transportation Civil Design'}, {id=87, name='Construction Services', order=38, label='Construction Services'}, {id=114, name='Geotechnical Engineering', order=65, label='Geotechnical Engineering'}]}', 39='{type=string, value=wilmington-transit-center}', 8='{type=string, value=

Verdantas was part of the design/build/operate team for this public-private partnership project which includes design and construction of a multi-purpose transit facility on an environmentally impacted site in the City of Wilmington. The new facility includes a multi-modal transit center for buses operated by Delaware Transit Corporation, areas for a car rental facility, a multi-level public parking garage and related amenities. Verdantas' multi-disciplined services included civil site design, stormwater management and land development approvals, entrance and roadway improvement design, a geotechnical evaluation and consultation, and environmental planning, approvals and oversight, as well as construction phase testing and review.

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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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{id=62875256350, createdAt=1640875885529, updatedAt=1660058041316, path='amazon-distribution-center', name='e-Commerce Distribution Center', 1='{type=string, value=E-Commerce Distribution Center}', 33='{type=number, value=0}', 34='{type=list, value=[{id=10, name='Civil Infrastructure', order=4, label='Civil Infrastructure'}]}', 4='{type=string, value=Civil site design and construction services for distribution facility.}', 36='{type=string, value=Etna, OH}', 5='{type=list, value=[{id=21, name='Technology', order=6, label='Technology'}]}', 37='{type=list, value=[{id=88, name='Survey', order=39, label='Survey'}]}', 39='{type=string, value=amazon-distribution-center}', 8='{type=string, value=

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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