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991:
1001:
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401:
In the 1920s, the aqueduct was upgraded with the addition of a second pipe from Great Falls to
Dalecarlia, along with several new reservoirs and a pumping station, A rapid sand filter plant was built at Dalecarlia Reservoir, which went online in 1927. The Dalecarlia plant is the larger of the two
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879:
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413:. A new water supply pipe was constructed at Chain Bridge and service to Arlington began in 1927. Additional pipes were built as Arlington's population grew, including one under the Potomac River. In 1947, Congress approved adding the city of
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basin. A portion of the water from the reservoir is treated at the nearby
Dalecarlia Water Treatment Plant and distributed to municipal water mains. The remainder of the water from the reservoir flows to the
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994:
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The
Aqueduct is a wholesale water supplier, and the communities it serves are responsible for billing customers and managing water mains. The service area is:
1004:
374:
plants, relying instead on the reservoirs to act as settling basins. By the turn of the 20th century, however, Washington's growth and the high amount of
354:, after which it is pumped through city mains. The Dalecarlia Reservoir was modified in 1895 and 1935 to improve water quality and increase water supply.
382:
bed system, was installed at McMillan
Reservoir, and was completed in 1905. Improvements in the early 1900s were planned and supervised by Army engineer
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125:
671:
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300:. Portions of the Aqueduct went online on January 3, 1859, and the full pipeline began operating in 1864. The pipeline runs along what is now
239:
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36:
254:
686:
Maps of the
Washington Aqueduct, Md. and Washington D.C. : to accompany supplemental report of Chief Engineer dated Feb. 22nd 1864
1100:
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The system is owned and operated by the U.S. Army Corps of
Engineers and has been in continuous use ever since. It is listed as a
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425:
343:
312:
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neighborhood of
Washington. This facility serves as an additional sedimentation basin, and then the water flows through the
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in the
Potomac's water kept the reservoirs from doing their jobs well, and so the first treatment plant, a massive
246:
45:
680:
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418:
215:
616:
750:
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242:. Portions of the aqueduct went online on January 3, 1859, and the full pipeline began operating in 1864.
231:
668:
765:
745:
696:
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Transportation buildings and structures on the
National Register of Historic Places in Washington, D.C.
615:. Washington, D.C.: U.S. Army Corps of Engineers. October 2002. Historical Vignette 059. Archived from
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Capital
Engineers: The U.S. Army Corps of Engineers in the Development of Washington, D.C., 1790-2004
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362:
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371:
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316:
281:
1081:
Transportation buildings and structures on the National Register of Historic Places in Maryland
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383:
308:
250:
64:
681:
National Park Service.gov: National Historic Landmarks Program & the Washington Aqueduct
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began in 1923 at the McMillan plant. The McMillan plant was not replaced until 1985, when a
379:
230:. One of the first major aqueduct projects in the United States, it was commissioned by the
223:
113:
68:
690:
609:"The Corps Has Helped Solve Urban Water Problems Since 1824 - Beginning at the White House"
58:
675:
402:
plants in the system, having been upgraded in the 1950s, and is the plant that serves the
594:
669:
National Park Service.gov: A longer history of the system, from the C&O Canal site
525:
181:
1019:
510:
270:
227:
636:
History and construction of the aqueduct leading to McMillan Park, Washington, D.C.
424:
The U.S. Army Corps of Engineers built an additional intake and pumping station at
391:
219:
370:
The system originally used a single pipe for water delivery, and did not have any
494:
327:
140:
127:
403:
387:
375:
1106:
Water supply infrastructure on the National Register of Historic Places
324:
1091:
Transportation buildings and structures in Montgomery County, Maryland
685:
1066:
National Register of Historic Places in Montgomery County, Maryland
499:. Baltimore, MD: U.S. Army Corps of Engineers, Baltimore District.
361:
264:
89:
234:
in 1852, and construction began in 1853 under the supervision of
443:, and most of the federal installations in the city through the
304:, traversing some of the higher cliffs along the Potomac River.
700:
691:
Washington Aqueduct, Montgomery County, Inventory No.: M: 29-49
253:, which carries a portion of the aqueduct, is also listed as a
585:"Gen. Henry Newcomer Dies; Helped Develop Arterial Roads Here"
409:
In 1926, Congress approved selling water from the aqueduct to
285:
593:. Washington, DC. December 5, 1952. p. A-26 – via
1096:
Transportation buildings and structures in Washington, D.C.
643:. ARCV 72-115.41. Records of Phi Mu, Special Collections,
280:
The centerpiece of the Aqueduct is a 12-mile (19 km)
995:
Category:National Register of Historic Places in Maryland
1026:
Aqueducts on the National Register of Historic Places
964:
923:
795:
761:
History of the National Register of Historic Places
738:
200:
192:
187:
174:
164:
156:
119:
107:
550:. Washington, D.C.: U.S. Army Corps of Engineers.
311:carries the pipeline and MacArthur Boulevard over
417:, to the aqueduct system, and nearby portions of
226:, and parts of its suburbs, using water from the
1061:National Historic Landmarks in Washington, D.C.
526:"A Sycamore Neighbor: The Washington Aqueduct"
445:District of Columbia Water and Sewer Authority
712:
513:. U.S. National Park Service. April 21, 2021.
333:The Dalecarlia Reservoir serves as a primary
269:The Washington Aqueduct Dam, upstream of the
8:
1005:Portal:National Register of Historic Places
719:
705:
697:
96:Dalecarlia Reservoir & Treatment Plant
57:
728:U.S. National Register of Historic Places
37:U.S. National Register of Historic Places
1056:National Historic Landmarks in Maryland
660:U.S. Army Corps of Engineers: official
539:
537:
535:
474:
67:carries the Washington Aqueduct across
1036:Bridges in Montgomery County, Maryland
488:
486:
484:
482:
480:
478:
20:
7:
693:at Maryland Historical Trust website
406:communities that use the Aqueduct.
255:Historic Civil Engineering Landmark
496:The Washington Aqueduct: 1852-1992
14:
350:to the treatment facility at the
1076:The Palisades (Washington, D.C.)
1051:Infrastructure completed in 1859
999:
990:
989:
786:
779:
645:University of Maryland Libraries
366:Dalecarlia Water Treatment Plant
88:
81:
323:. This bridge was the longest
46:U.S. National Historic Landmark
1031:Aqueducts in the United States
176:
1:
524:Norman Metzger (March 2004).
398:plant was opened next to it.
639:(Thesis). College Park, MD:
574:Publication No. EP 870-1-67.
240:U.S. Army Corps of Engineers
18:United States historic place
1041:Bridges in Washington, D.C.
977:National Historic Landmarks
432:Operations and service area
421:, were added in the 1960s.
330:in the world for 40 years.
298:Montgomery County, Maryland
284:that connects the system's
1122:
450:Arlington County, Virginia
411:Arlington County, Virginia
247:National Historic Landmark
1101:Water in Washington, D.C.
985:
777:
218:that provides the public
175:NRHP reference
76:
56:
52:
43:
34:
27:
23:
1046:Chesapeake Bay watershed
419:Fairfax County, Virginia
111:5900 MacArthur Blvd., NW
1071:Potomac River watershed
493:Ways, Harry C. (1996).
751:Keeper of the Register
641:University of Maryland
544:Scott, Pamela (2007).
455:Falls Church, Virginia
415:Falls Church, Virginia
367:
348:Washington City Tunnel
319:near the community of
277:
766:National Park Service
746:Contributing property
613:Headquarters; History
511:"Washington Aqueduct"
386:. The regular use of
365:
268:
261:Design and facilities
141:38.93750°N 77.11417°W
633:Chick, H.M. (1934).
528:. Sycamore Islander.
340:Georgetown Reservoir
321:Cabin John, Maryland
294:Dalecarlia Reservoir
955:South and Southeast
940:North and Northwest
662:Washington Aqueduct
302:MacArthur Boulevard
296:on the border with
236:Montgomery C. Meigs
212:Washington Aqueduct
201:Designated NHL
169:Montgomery C. Meigs
146:38.93750; -77.11417
137: /
29:Washington Aqueduct
950:East and Northeast
945:West and Southwest
674:2014-01-07 at the
372:water purification
368:
352:McMillan Reservoir
317:Cabin John Parkway
278:
1013:
1012:
756:Historic district
396:rapid sand filter
384:Henry C. Newcomer
309:Union Arch Bridge
251:Union Arch Bridge
208:
207:
196:September 8, 1973
188:Significant dates
65:Union Arch Bridge
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815:Baltimore County
790:
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782:
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619:on June 4, 2011.
599:
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590:The Evening Star
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564:on July 22, 2009
560:. Archived from
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507:
501:
500:
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441:Washington, D.C.
380:slow sand filter
358:System expansion
313:Cabin John Creek
224:Washington, D.C.
204:November 7, 1973
178:
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114:Washington, D.C.
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69:Cabin John Creek
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676:Wayback Machine
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626:Further reading
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222:system serving
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771:Property types
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654:External links
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595:Newspapers.com
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557:978-0160795572
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459:Fairfax County
457:, and part of
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335:sedimentation
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271:Potomac River
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232:U.S. Congress
229:
228:Potomac River
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193:Added to NRHP
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885:Queen Anne's
810:Anne Arundel
661:
635:
617:the original
612:
588:
579:
568:September 2,
566:. Retrieved
562:the original
546:
519:
505:
495:
461:, including
435:
426:Little Falls
423:
408:
400:
392:disinfectant
369:
332:
306:
279:
244:
220:water supply
211:
209:
15:
965:Other lists
328:arch bridge
290:Great Falls
275:Great Falls
144: /
120:Coordinates
1020:Categories
905:Washington
895:St. Mary's
875:Montgomery
845:Dorchester
469:References
129:38°56′15″N
931:Baltimore
915:Worcester
850:Frederick
798:by county
428:in 1959.
344:Palisades
292:with the
165:Architect
160:1853-1864
132:77°6′51″W
910:Wicomico
890:Somerset
825:Caroline
805:Allegany
732:Maryland
672:Archived
404:Virginia
388:chlorine
376:sediment
315:and the
282:pipeline
238:and the
216:aqueduct
182:73002123
108:Location
972:Bridges
935:Central
860:Harford
855:Garrett
840:Charles
830:Carroll
820:Calvert
664:website
342:in the
325:masonry
71:in 2008
900:Talbot
865:Howard
739:Topics
554:
463:McLean
249:. The
214:is an
835:Cecil
796:Lists
390:as a
157:Built
870:Kent
570:2014
552:ISBN
307:The
210:The
63:The
933:: (
730:in
288:at
286:dam
273:'s
177:No.
1022::
611:.
587:.
534:^
477:^
257:.
957:)
720:e
713:t
706:v
647:.
597:.
572:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
