Expert Knowledge Applied to Understand and Deliver Solutions for Our World

Our diverse team of experts work to complete projects for the benefit of people and communities. Collectively, we have a reputation of solving problems and helping our clients achieve positive results and responsible environmental stewardship.

We work with clients to address specific project goals and incorporate our multidisciplinary strengths to develop innovative approaches. We have completed numerous projects for state, county and local governments and public utilities, including those who serve large metropolitan areas—and many industrial and real estate clients in the private sector.

We offer:

Local, State and Federal Permitting  |  Water and Wastewater Facility Planning  |  Design, Bid, and Construction Phase Services  |  Asset Mapping and Management  |  Funding Assistance  |  Advanced Modeling & Analysis

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Our Expertise

Our Experience

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With the design and construction of a significant pump station such as Walnut Creek, also comes a sizeable electrical distribution system that is needed to support the large pumps selected for the project. The station design included a 3000Amp, 480/277VAC, switchgear lineup that included primary and alternate source main breaker scheme for transferring between power sources. The lineup included (5) soft-starters, multiple feeder breakers and step down transformers and distribution panels.

Rapid growth in the city of West Des Moines, Iowa resulted in substantial increases in stormwater runoff in most of the community’s watersheds. Such growth made it necessary to mitigate flooding on several major roadways to ensure emergency services were not impacted by closed roadways, as well as to take steps to minimize flooding commercial districts and residential neighborhoods.

Our team worked to provide a comprehensive solution for the City via mitigation solutions including construction of a new 12’ by 5’ reinforced concrete box culvert to intercept and convey interior stormwater flows, and a new 200,000 gallons per minute (gpm) stormwater pump station to discharge runoff to Walnut Creek during elevated flood stages. The stormwater pump station is proposed to be situated along Walnut Creek in an existing U.S. Army Corps of Engineers flood control project – the Des Moines, Iowa levee system. As a result, a U.S. Army Corps of Engineers Section 408 Permit was required for the modifications to the levee.

Hydrologic and hydraulic modeling was completed using XPSWMM 2014 SP1 to evaluate the required total capacity and optimal configuration for the proposed stormwater pump station, to handle both low and high flow precipitation events, using Grand Avenue as the key control elevation to manage flooding in the drainage area. The complex urban drainage area, with multiple collection and conveyance systems, as well as the evaluation taking into account storage in the proposed concrete box culvert, required the sophisticated software package to accurately model the system. The analysis resulted in approximately 200,000 gallons per minute (gpm) of pumping capacity was required to keep interior water elevations to acceptable levels.

The stormwater pump station structure required a complex structural design. A three dimensional analytical model of the pump station was created using finite element analysis. Each component of the structure (walls, slabs, foundations, etc.) was represented by a mesh of 1 ft. x 1 ft. elements that are interconnected to transfer shear, moment, and axial forces. Wall and floor slab thicknesses were computed, floatation stability of the station was determined, and foundation requirements were provided. In addition to the structural design, mechanical design was required for sluice gate intakes to the station, sluice gate outfalls to the Walnut Creek, influent trash racks, and for the pump configuration set points and discharge configuration.

The stormwater pump station was modeled with Revit® software, allowing for 3-dimensional views of the pump station proper and various components. The use of Revit also allowed for continuous updating of quantities of materials as the design progressed, yielding very accurate construction items and quantities for cost estimating. Additionally, considerable attention was given to the visual appearance of the pump station. The use of the Revit modeling software allowed for various architectural treatments to be applied to the views in a rendering fashion, assisting the client in making decisions with respect to the pump station aesthetics.

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Precise Visual Technologies | Civil Infrastructure | Process Engineering | Mechanical Electrical and Automation Engineering | Hydrology Hydraulics and Fluids
Walnut Creek Stormwater Outfall and Pump Station

A sizeable electrical distrubution system was needed to support the large pumps selected for this significant pump station

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The Town of Middletown, Delaware owns and operates its own wastewater system including their treatment plant and disposal systems. They has traditionally relied on irrigation of treated wastewater on Town owned dedicated spray fields as well as reuse on turfgrass and adjacent farmlands. Rapid Town growth has driven an increase in wastewater volumes while also consuming available land around the Town reducing opportunities for increasing the disposal system capacity.

Verdantas assisted the Town is resurrecting a plan to install Rapid Infiltration Basins (RIBs) on existing Town lands. RIBs provide a greater disposal capacity per unit area then irrigation systems. The RIBS were constructed primarily within existing irrigation system buffer areas to maximize disposal capacity on the site. Our team prepared plans and permitting documents for 20 new RIBs on the Town’s Ford Farm site, assisted with construction review, and are now conducting full scale infiltration studies to optimize operations. Current disposal capacity uis 0.8 MGD.

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Ford Farm Wastewater Disposal Area Circa 2007, spray fields areas are depicted with green outlines
Process Engineering
Middletown Rapid Infiltration Design and Permitting

Verdantas assisted is resurrecting a plan to install Rapid Infiltration Basins (RIBs) on existing Town lands

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The City of Bethlehem currently operates a 20-million gallon per day (gpd) activated sludge wastewater treatment plant, which has the ability to handle peak wet weather flows of 50 million gpd. 

This project included upgrades to the West Influent Pump Room, which contained three (3) constant speed Yoemens 100 hp dry pit submersible pumps, each with a capacity of 12 MGD.   The scope included the replacement of existing pumps along with all piping, valves, and appurtenances located within the West Influent Pump Room. The new pumps were designed to operate on variable frequency drives (VFDs) and controlled on wet well level as monitored by instrumentation. This upgrade also included replacement of  the MCCs, and upgrade of  the existing control and alarm panels that were integrated into the plant’s existing SCADA system.  The  scope also included design of a new ventilation system and replacement of existing stairs and platforms.

Our experts leveraged 3D scanning and 3D modeling technology to efficiently design the project. Because space was limited, and all new equipment had to fit within the existing structure, our team scanned the existing facility to develop an accurate as-built the facility, and utilized the scan to develop an accurate 3D model to design the required improvements. The City was able to maintain operation of the treatment plant throughout the duration of the project.

Our team was responsible for all survey, mechanical, electrical, structural and automation design disciplines, preparation of bidding documents, and assisting the City with construction administration services}', 40='{type=list, value=[{id=3, name='Facilities', order=1, label='Facilities'}]}', 13='{type=image, value=Image{width=745,height=536,url='https://www.verdantas.com/hubfs/Projects/Bethlehem-West-Influent/Bethlehem%201.jpg',altText=''}}', 14='{type=string, value=Leveraging 3D scanning helped develop an accurate 3D model to design the required improvements.}', 15='{type=image, value=Image{width=357,height=243,url='https://www.verdantas.com/hubfs/Projects/Bethlehem-West-Influent/Bethlehem%202.png',altText=''}}', 16='{type=string, value=our team scanned the existing facility to develop an accurate as-built the facility}', 25='{type=number, value=0}', 26='{type=string, value=Facilities}', 27='{type=number, value=0}', 29='{type=number, value=16}'}
Leveraging 3D scanning helped develop an accurate 3D model to design the required improvements.
Precise Visual Technologies | Process Engineering | Mechanical Electrical and Automation Engineering
West Influent Pump Replacement

Read about the full service engineering that helped the City of Bethlehem upgrade its activated sludge wastewater treatment plant

  • Since 2016, the Verdantas Team has consistently provided thorough, accurate, and timely plan reviews despite the pressures of fast-paced development in the community.

    Town Engineer Local Municipality, Delaware

  • Our municipality has utilized Verdantas as a consultant for capital projects involving the repair and replacement of its aging water and sewer infrastructure. They have provided initial engineering, design and construction management. The accuracy and thoroughness of their plans has resulted in capital projects that have consistently finished on time and within budget without unexpected change orders.

    Town Engineer Local Municipality, Delaware


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