Update: A River of Slime

After I published the winding tale of the Tiber Creek turned Washington City Canal turned “River of Slime”/Constitution Avenue, I got some very interesting comments and letters.  Some corrected details of the story (i.e. I was reminded to clarify that Adolph Cluss was more than “a young German immigrant engineer”).  I was also given some very fascinating additional information.  Specifically, I learned that the original outlet to Boss Shepard/Cluss’s sewer was uncovered in an archaeological dig JUST LAST MONTH…

When I taped my most recent WAMU radio segment with Rebecca Sheir a few weeks ago, we noticed a construction site just south of the Lockkeeper’s House. This, the 17th Street Levee Project, is an effort of national and local agencies to modernize the mall’s levee system that dates to the late 1930’s, and to hold off flooding from the Potomac.

Last month, as part of the project, workers uncovered the original outlet to Shepard & Cluss’s “tunnel of slime” – this is the sewer they had created to bury the Washington City Canal and form today’s Constitution Avenue.

The historic sewer uncovered at the original Potomac River waterline. Notice the Lockkeeper's House in the rear of the photo.

To comply with the National Preservation Act, the agencies performed archaeology on the historic outlet, took the structure apart, and set aside the stones. The excavation did not reach the bottom of the structure, which had an interior diameter of 24 feet.  The sewer was bone dry and in perfect condition.  This is likely the same arch shown in the engraved illustration of the flushing gates that you can see in my original blog post:

Drawing of the sewer outlet into the Potomac River, 1894. Photo by SewerHistory.org via the Affordable Housing Institute

Shepard’s sewer outlet was probably closed during the 1930’s when the city’s sewer system was modernized or when the modern mall was completed and the river line changed.

Radio Time: A River of Slime

Why watch TV when you can listen to the radio?

As you may know, the location is featured every month on Metro Connection, a local news magazine show on Washington, D.C.’s NPR station, WAMU 88.5.  In each segment (also called the location), I talk about a different D.C. location that has some kind of interesting or offbeat history. I also have a theme song!

Listen in tomorrow, February 24 at 1pm or Saturday, February 25 at 7am.

Did you know that Washington, D.C.’s Constitution Ave. used to be a canal?  (Non-D.C. people: Constitution Avenue is the street where all of the Smithsonian museums live).  In this month’s segment, we visit the Lockkeeper’s House, the last remaining vestige of that time in D.C. history.  The tiny fieldstone building (c.1833) still stands on the busy corner of Constitution Ave. and 17th Streets, two blocks south of the White House.

If you live outside the area or don’t have access to a radio, you can listen to the show HERE.

To read the original blog post that inspired this week’s show, click HERE.

A River of Slime

How is Washington, D.C. like this scene from Ghostbusters II?

Answer: Like the fictionalized residents of NYC in 1989, most present-day Washingtonians are unaware that an unusual river of slime runs beneath their city.  (But ours is not paranormal).  Here’s the story…

Constitution Avenue was once a river

Back when D.C. was born, water was integral to the development of commerce.  Roads were unreliable, and other technologies hadn’t been developed.  Why else would the city’s founders have placed it at the intersection of two swampy, humid, mosquito-filled waterways, the Potomac and the Eastern Branch (a.k.a. The Anacostia)?  In fact, Pierre L’Enfant’s original 1792 plan for D.C. shows us that their city was far more watery than the one we know today.  If the Washington Monument had been built then, it would have sat on the shores of the Potomac, and the Lincoln Memorial would be underwater. From the foot of Capitol Hill out to the Potomac, there ran a body of water called Tiber Creek (whose name had been changed from Goose Creek when it was decided that D.C. would become America’s capital – ya know, because they were emulating Rome).

L'Enfant Plan

D.C.’s founders and business leaders believed that the city’s economic development would be vastly enhanced if only there was a canal connecting the Anacostia River (navigable to Maryland) to the Potomac (the gateway to the west) through the city.  This, the Washington City Canal completed in 1815, flowed up north from the Anacostia, passed west of the Capitol Reflecting Pool, and then headed due west along the Tiber River whose path is today’s Constitution Ave.  In other words, Constitution Ave. was once a river.

The Tiber Creek/Washington City Canal is visible to the north. Photo by Civil-War-Photos.com

Ever wonder what that random tiny stone house is on the Mall? 

In 1828, construction began on the Chesapeake and Ohio Canal, another dream waterway which would connect commerce up to Pittsburgh and through all areas in between.  In the original plans, the C&O system was supposed to end in Georgetown, but that idea made D.C. leaders nervous.  They imagined that the canal would help G-town outshine the Capital City, so they ransomed their $1M investment in the project and had that changed.  The C&O would now end at the Washington City Canal.

Thus completed in 1833 and known as the C&O Branch Extension, D.C.’s canal connection into the C&O began at the Rock Creek Basin and followed 27th Street down until it connected into the Washington City Canal at 17th and Constitution Aves.  Someone was going to have to collect the tolls and keep the records, so a Lockkeeper’s House was built at 17th and Constitution.  Owned today by the National Park Service, the Lockkeeper’s House is one of the last reminders that a canal ever flowed through Washington D.C.

Photo by National Park Service

A small federal style house built of field stone and measuring 30 feet wide and 18 feet deep, the Lockkeeper’s House originally sat 40 feet west and 10 feet north of its current location, but was moved in the 1930’s when 17th Street was widened.

According to some reports, the Lockkeeper and his 13 children lived in the building.  Cool story from an interview of Otho Swain, a man born on a canal boat in 1901, whose father was a boatman and locktender and whose grandfather helped build the C&O:

My grandfather, he had boated coal down Constitution Avenue.  There used to be a canal that crossed the Potomac there, and there’s a little stone house still standing on the corner of 17th and Constitution Avenue.  It was a lock house.  My grandmother lived in that lock house, and that’s where my grandfather met her….

The Lockkeeper’s House was given to the National Park Service at the beginning of the 20th century during the construction of Potomac Park.  For a time it was used as a “public comfort station”, but today NPS uses it as storage.

Decline to Slime

Although D.C.’s founders believed that waterways would bring commerce, we know better today – railroads were the technology of the future.  As the rail was developed, the canal system fell into disuse.  (Plus, the Washington City Canal had always been a bit of a mess. The water was shallow and so could only handle boats drawing less than 3 feet of water.)

So, the canal system was completely abandoned by the end of the 1850’s.  The C&O Canal only made it as far as Cumberland, MD before it went under.  What did D.C.’s residents do with this body of water running through its middle?   Throughout the Civil War and after, they turned the Washington City Canal into an open sewer.

Photo by Affordable Housing Institute

Luckily, when Boss Shepard came into power in the 1870’s, this smelly problem was added to his list of public improvements.  A young German immigrant engineer, Adolph Cluss (i.e. the man responsible for Eastern Market, Sumner School, and the Masonic Lodge, among many many other things), was enlisted to move the body of water underground.  He apparently built a tunnel from Capitol Hill down to the Potomac that is  “wide enough for a bus to drive through to put Tiber Creek underground”.

A River Runs Under It

When the canal was filled in, it created B Street, which was subsequently renamed Constitution Avenue.  Although the massive undertaking solved public health problems, the federal government apparently did not contemplate the potential engineering dilemmas that might result from building on top of an underground creek/sewer:

Many of the buildings on the north side of Constitution apparently are built on top of the creek, including the Internal Revenue Service Building, part of which is built on wooden piers sunk into the wet ground along the creek course. The low-lying topography there contributed to the flooding of the National Archives Building  (Archives I in Washington, DC), IRS, and Ariel Rios  buildings that forced their temporary closure beginning in late June 2006. In fact, until the mid 1990s, that part of Washington around the intersection of 14th Street  and Constitution was an open parking lot because the underground water was too difficult to deal with. During construction of the Ronald Reagan Building  (1990–98), the engineers figured out how to divert the water. But that dewatering then reduced the water level underneath the IRS building which caused the wooden piers to lose stability and part of the IRS building foundation to sink.* **

National Archives building 2007 Photo by BMS CAT

So maybe D.C. doesn’t have real ghosts flowing under our feet, but that doesn’t mean we aren’t haunted  by underground things from the city’s past.


This article was cross-posted on Greater Greater Washington.