DC's Massive Pipeline Project Being Rethought

Area watersheds.  Image: DC Water

Billions of dollars in spending set aside for a massive pipeline project to keep polluted DC water out of area waters could get delayed and re-channeled to more decentralized infrastructure like rain gardens, rainwater harvesting, trees and rain barrels - that is, if DC's independent water authority gets its way.

The sea change in the city's 20-year timeline for cleaning up area rivers will happen only if DC Water can renegotiate a 2005 federal decree to build the full tunnel system.  That consent decree from the Environmental Protection Agency emerged out of a lawsuit over DC's management of runoff in which several environmental groups were plaintiffs.

A decision on the future flow of the city's $4.6 billion Clean Rivers Project could come in the next week or so, a spokeswoman with the city's water authority, The District of Columbia Water and Sewer Authority, or DC Water, told DCMud this week.

"It might shift to a more green solution, or it might be a hybrid of the two: green and gray," DC Water spokeswoman Pamela Mooring told DCMud.  Green infrastructure, here, refers to infrastructure that absorbs or uses water before it enters the sewer system in the first place.  Gray solutions refer to engineering to deal with runoff after it happens - in this case, a massive tunnel infrastructure project to build underground storage tanks for overflow.

The water authority is making efforts to re-focus the Clean Rivers Project for an eight-year pilot "Low-Impact Development" program.  The proposal could emphasize infrastructure like rain barrels and rain gardens instead of pipes that have been the mainstay of water channelling.  DC Water says that approach - if it proves successful - could render two future pipelines, planned to keep run-off out of the Rock Creek and Potomac waters, obsolete, possibly saving millions of dollars.  It notes that other cities including Kansas City and St. Louis have already experimented with similar versions of green infrastructure.

Blue Plains Treatment Plant. Image: DC Water

DC Water says revising the plan could save rate-payers millions of dollars and slash $120 from the monthly water bill increases forecast by the end of the decade.

Old System, Old Problem

Regardless, consensus holds that the city must do something about its dirty water problem.  About one third of DC's water system was built in the 1800's, before pipe systems separated storm water, or run-off from non-permeable surfaces, from sewage.  That part of the system is called a combined sewer system (CSS), and when heavy rains like those from Hurricane Sandy hit the low-lying city, the CSS can't handle all the water and dumps it - along with sewage - into area watersheds, reducing water oxygen levels and killing wildlife at 53 documented places.

A portion of the pipeline system planned for the Anacostia River is already under construction.  In 2011, DC Water awarded a $330 million contract to a joint proposal from Traylor brothers-Skanska-JayDee (TSJD) to build the first part of the system.  The pipe, 23 feet in diameter, would be laid 100 feet underground and extend 12,500 feet from southwest DC, along the Potomac and under the Anacostia to about RFK Stadium.  Slated for completion in January, 2018, the massive system will hold dirty water from the CSS until it can be piped to the Blue Plains Treatment Plant for processing in dryer weather.  Of the scale of the project, DC Water General Manager George Hawkins called it "absolutely huge." "The machine our teams will use to build these tunnels is the size of a football field," and needs to be assembled underground.

Image: courtesy Mike Bolinder, @AnacostiaRrkper on Twitter

Riparian Repair - "Not a Zero Sum Game"

Although he supports a low-impact development approach, Anacostia Riverkeeper Mike Bolinder said it's an approach that he supports in combination with the full, planned tunnel system.  "In general I love the idea of green infrastructure, but there is a consent decree in place."

Bolinder said yearly sewage overflow into all three DC watersheds amounts to 2.5 billion gallons.

On the money question, Bolinder said the CSS under the city was built in the time of Abraham Lincoln, so it makes sense that replacing it will cost some money.  There is also the cost of maintaining and monitoring the efficacy of low-impact development.  "If they don't maintain rain gardens, they stop retaining stormwater," Bolinder said.  "Then we have the same system that we had beforehand, with a couple of rain gardens."

Washington D.C. real estate development news

ANC Supports RiverFront on the Anacostia Project at Zoning Hearing

Late last week, a zoning commission meeting brought the RiverFront on the Anacostia project one small step closer to fruition.

The 1.1-million-square-foot mixed-use project, which was designed by SK&I architects and is situated on the Anacostia River just south of Nationals Park, had a hearing in front of the DC Zoning Commission Thursday night. While commissioners were noncommittal, requiring supplemental information from Florida Rock Properties (FRP) and Mid-Atlantic Realty Partners (MRP), the developers, the coup was a letter of support from the local ANC commission covering the site.


The zoning commission originally approved plans for the 5.5 acre site back in 2008, but the developers proposed last year to change the project’s first phase from office space to 300-350 residential units, given the current dismal situation for office space in the neighborhood. A February 2012 hearing didn’t go well—the commissioners all but told the developers to start all over with the designs—but John Begert with MRP Realty said this one seemed a little better, though he didn’t draw any conclusions. “We feel like our presentation went pretty positively, and that’s kind of all you know,” he said.

The commissioners tasked the developers with sending in additional information, including clarifications on the project’s roof plan and how an alley running through the development will be designed. The developers will submit the information within two weeks, but the commission may not make a decision until later this year or even early 2013.

Still, support from the ANC was good news.  "After presenting at multiple monthly ANC meetings and working with the ANC and my SMD’s Citizens’ Development Advisory Committee, the development team presented a final plan this month that we were happy to support,” wrote ANC 6D commissioner David Garber, whose district includes the site, in a letter dated September 20. “The elements of this most recent plan that we hope you will join us in specifically supporting are its engaging architecture, creative and usable public space, ground floor and roof-top retail, and the promised play installation designed specifically for children that is noted in the plan but will be laid out as part of a future phase of the PUD.”


The project’s first phase is a nine-story building that will feature almost 19,000 square feet of retail space and a small amount of affordable housing; 8 percent of its residential units will be priced at 80 percent of the area median income. The project will also include an expansive public section: picture wide green lawns, wetlands-type areas that act as bio-filtration mechanisms for stormwater management, and tree covered spaces, as well as a marina that could accommodate up to 50 boats.

The project, a former concrete plant, is set at the foot of the South Capitol Street Bridge, and has been in the works off and on since 1998.  The developers have more plans for the property, but subsequent phases are several years down the road.

Washington D.C. real estate development news