“As Above, So Below. As Within, So Without.”
There are miles of old abandoned water tunnels directly under a lot of Alefantis’s properties of interest. The picture above is of workmen in one of the tunnels circa 1900s.
First off there is a bit of background on the tunnels then there’s a map outlining all the properties of interest in relation to the tunnel network. I’ve also included examples of some of the tunnels discovered.
The Washington Aqueduct
The Washington Aqueduct, managed by the U.S. Army Corps of Engineers, provides wholesale water treatment services to DC Water and its partners in Northern Virginia, Arlington County and Falls Church. – DC Water
The Origin of Washington’s Water Supply ? Architect of the Capital
Precast conduit segments for the Washington Aqueduct.
Note that just before the aqueduct crosses Rock Creek it branches off left into Georgetown.
1864 | Reference
A close up of the Washington Aqueduct tunnels in downtown Washington. Note they pass straight through the White House.
The conduit is the largest structure of the water system. It stretches almost 12 miles downriver from the intake at Great Falls to the Georgetown Reservoir. The circular tube, built of brick, stone and mortar, is 9 feet in diameter. It was constructed by tunneling and by deep rock cuts. A road was built parallel to the conduit to facilitate cleaning repairs and inspections. The road was originally named Conduit Road, today it is MacArthur Boulevard.
Route of the Washington Aqueduct conduit.
The Washington Aqueduct | YouTube
This short documentary talks about only 1 conduit used at a time. We only see the conduit down as far as Georgetown Reservoir.
Cities of the Underworld – Washington DC: Seat of Power | YouTube
This documentary give a good insight into the what the tunnels look like under DC.
The Washington City (Lydecker) Tunnel
The Washington (Lydecker) Tunnel, completed in 1901 by the Army Corps of Engineers, is up to 10 meters in diameter and runs 4 miles from Georgetown Reservoir to McMillain Reservoir. Shortly after in 1926 a second tunnel was dug beside it.
The Lydecker Tunnel Fiasco | Architect of the Capital
The Washington Post describes the reality: “A committee of experts went through the tunnel and found that instead of a solid lining, thousands and thousands of feet of the tunnel contained nothing more than a brick arch, with spaces between the sides and the top of the arch and the original rock large enough to drive a coach through.”
This map shows the proposed route of the Washington Tunnel.
This map shows the water distribution network for Washington DC. The Washington Tunnel is the red broken line running left across the map from McMillan Reservoir. The old Washington Aqueduct conduit is also shown in solid red lines.
A Brief History of Bloomingdale | Bloomingdale DC
The Army Corps added the McMillan Park Reservoir and the Washington City Tunnel (10 meters in diameter and 4 miles long) between 1882 and 1902.
Bryant Street pumping station Final Seminar Project | By Justin Kockritz
A second tunnel paralleling the original was completed in 1926 which allowed the Lydecker Tunnel to be periodically closed for routine maintenance without noticeably interrupting water service.
Configuration of the Bedrock Surface of the District of Columbia and Vicinity | usgs.gov
The diagram below shows a cross section of the tunnel. There are several vertical air shafts.
In the Widows Mite air shaft just north of Wyoming Avenue, near the line of Twenty-second Street, the official section shows a capping of “clay and sand 30 feet thick” underlain by 35 feet of “clay,” but this is undoubtedly a mistake, as the gneiss has been revealed by many cellars in this vicinity under only a few feet of terrace gravel and sand. In the air shaft on the highest part of the ridge near the corner of Sand Thirty-fifth Streets the blueprint of the tunnel section shows 42 feet of “clay” lying on “soft rock” at a depth of 158.7 feet, but in fact the rotted bedrock out-cropping extensively in that area is overlain by very thin remnants of terrace gravel at 195 feet above sea level. Probably the clay referred to is mostly rctten rock.
Merging the two maps produced this.
Properties of Interest