How a reinforced concrete pipe protects New Delaware’s municipal park from flooding


Delaware City Logistics Park is a modern two million square foot distribution and processing park that enables tenant companies to serve millions of customers in the Eastern United States and Canada every day. Strategically located south of Wilmington near the fragile Delaware River watershed, a robust stormwater management system from Rinker Materials was installed by Corrado Construction to protect the 190-acre property and four-building campus from flooding .

“Although initially requested in HDPE, several lengths of long and critical pipes were transferred to the RCP just before start-up.”
-Richard Scrivener, project manager at Corrado Construction

The $136 million project owned by Northpoint Development includes a stormwater management system designed by Duffield and Associates that was constructed using a combination of round and elliptical reinforced concrete pipes (RCP). Nearly 9,000 linear feet of round CPR ranging in diameter from 12″ to 54″, and 29″ by 45″ to 38″ by 60″ elliptical CPR make up the drainage system, which will easily accommodate 45″ of rain annual and one foot of annual snow in the region each year.

A last minute change

“Although initially requested in HDPE (high density polyethylene pipe), several long and critical pipe lengths were transferred to RCP just prior to start-up,” said Richard Scrivener, project manager at Corrado Construction. “Rinker was very responsive to these changes and quickly provided us with the equipment we needed, allowing us to stay ahead of the winter weather on a time-sensitive project. The large scale and short timeline of this project was challenging, but Rinker’s team was essential to getting the job done on time and within budget. The last minute change from HDPE to RCP involved approximately 4,000 LF of pipe.

Marc Sandlhauser /

Todd Frey, senior project manager at Duffield and Associates – the designers of the project – explains that one of the challenges they had to overcome was related to stormwater management; regulations stated that the first hunt could not leave the site and must be done in smaller, environmentally sensitive facilities. “Reinforced concrete was used in a number of places because it was the product of choice and a stronger option in areas such as pond weirs,” says Frey. . “Plastic was used in some areas to save money, but not in areas where there were frequent heavier truck loads.”

“We were able to work with Rinker to get the materials on site to begin work on these emissaries, which was the very first piece of work needed to kick off the project. They adapted to the changing needs of our crews as weather conditions and sequence adjustments presented themselves, and they made sure we could always keep going,” says Scrivener.

Although a number of different machines were also used in the project, the distinctive yellow of the CAT equipment stood out. Corrado Construction used a CAT 336 excavator, a CAT IT38 rubber wheel loader, a pair of trampolines, as well as a CAT 563 dirt roller.

Del Logistic Park 1With the cold winter months looming on the calendar, Scrivener says the biggest challenge was timing. “The client needed a construction pad…but before construction work could begin, the site’s stormwater system had to be installed to control drainage to the site,” he says. “Permits could not be issued to begin building construction until the release infrastructure was in place.”

The stormwater system consisted of three large infiltration basins and one dry basin, along with associated storm piping. Scrivener explains that the basin outlet pipes have all been specified as RCP.

Anchored by its largest tenant DART Container, maker of Solo cups, Delaware City Logistics Park is expected to employ around 800 people when fully leased. Approximately 43% of US residents and 53% of Canadian residents can be reached by truck in one day from Delaware City Logistics Park.

“We saw this property as a unique opportunity to capitalize on positive regional market momentum and the limited supply of sites to accommodate large-scale development. The strategic location and access to an abundant workforce and capability provide a tremendous opportunity for the modern industrial occupiers whose demands we seek to meet,” said Johan Henrikson, vice president of development at Northpoint, in a statement when the agreement was announced.


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