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

New Renderings for Ballpark Project

With plans now officially on the table for Square 701, the block-long development just north of the ballpark, new images reveal additional details about the project that will add an 11-story office building, 170-room hotel, and 2 residential buildings to the ballpark area.  Work on the buildings is still at least 6 months away; developers Skanska USA and Grosvenor Americas closed on their purchase just last month and are now working on details of the by-right development.

Skanska will build the office building, designed by Gensler, and Grosvenor will build the hotel and 285 residential units, designed by Hickok Cole.  55,000 s.f. of retail space is also planned.  Since that announcement, new renderings have surfaced, see below.  The new office building is being designed to earn a LEED Gold platinum rating.

Washington D.C. real estate development news

Grosvenor, Skanska Close on Ballpark Site, Hope for Construction Next Summer

The Capitol Riverfront neighborhood got another shot in the arm today as developers announced a new project adjacent to the Nationals ballpark.  Developers Skanska USA and Grosvenor Americas closed yesterday on their purchase of the long block on 1st Street, SE, between M and N Streets, just north of the ballpark, and hope to begin construction by next summer.

The site, known as Square 701, will hold four buildings with more than 650,000 s.f. in total:

-An 11-story, 224,000 s.f. office building (built by Skanska, designed by Gensler, see rendering below),

-A 170-room hotel (by Grosvenor),

-Two residential buildings with a total of 285 units and connected by a "trellised glass bridge" (by Grosvenor, designed by Hickok Cole).

In all, the site will offer up to 55,000 s.f. of retail space.  The land had been owned by Potomac-based Willco Companies since 1948, and was cleared of buildings several years ago; in a simultaneous transaction Grosvenor purchased nearly the entire block from Willco and Skanska purchased the northernmost portion of the site from Grosvenor.  The site is adjacent to the hole Monument Realty excavated in 2007 and has left sitting ever since.  Rob Ward of Skanska says that while Grosvenor and Skanska are not technical or financial partners on the project, they will be working in tandem to unify the site.

Ward tells DCMud that while Willco had its own plans for the site, both Skanska and Grosvenor are developing new building designs, which have been wending their way through DC's zoning process throughout the summer.  Ward expects that under the most optimistic circumstances work could be underway on either the residential or office component as early as next summer; to date the developers have been in discussion with the ANC and zoning officials but "don't have enough design to pull permits yet."  Ward says the project is "basically by-right zoning" and "consistent with what the city has in mind for the site."

The new building is being designed to earn a LEED Gold platinum rating.  McCaffery Interests will be representing Grosvenor on construction elements of the project, which include the alley (Cushing Place) between this site and Monument's land.  The alley is expected to be reopened, though Ward notes that he has no news on Monument's projections for work to resume.  Below is a site plan - north is up.

Washington D.C. real estate development news