Tidal Basin

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Reservoir in Washington, D.C.

title: "Tidal Basin" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["chesapeake-bay-watershed", "historic-american-engineering-record-in-washington,-d.c.", "landmarks-in-washington,-d.c.", "potomac-river-watershed", "reservoirs-in-washington,-d.c.", "southwest-(washington,-d.c.)"] description: "Reservoir in Washington, D.C." topic_path: "engineering" source: "https://en.wikipedia.org/wiki/Tidal_Basin" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Reservoir in Washington, D.C. ::

::data[format=table title="Infobox body of water"]

FieldValue
nameTidal Basin
imageFile:Tidal Basin Glow.jpg
captionThe Tidal Basin (foreground), the Washington Monument (on left) and the Jefferson Memorial (on right), July 2016
pushpin_mapWashington, D.C.
locationWest Potomac Park, Washington, D.C., U.S.
coords
typeArtificial
inflowPotomac River

| | outflow | Washington Channel | | basin_countries | United States | | area | 107 acre | | depth | 10 ft | | elevation | 3 ft | | reference | | ::

::callout[type=note] Washington D.C. ::

| name = Tidal Basin | image = File:Tidal Basin Glow.jpg | alt = | caption = The Tidal Basin (foreground), the Washington Monument (on left) and the Jefferson Memorial (on right), July 2016 | image_bathymetry = | alt_bathymetry = | caption_bathymetry = |pushpin_map=Washington, D.C. | location = West Potomac Park, Washington, D.C., U.S. | coords = | type = Artificial | inflow = Potomac River

| outflow = Washington Channel

| catchment = | basin_countries = United States | date-built = | date-flooded = | length = | width = | area = 107 acre | depth = 10 ft | max-depth = | volume = | residence_time = | shore = | elevation = 3 ft | frozen = | islands = | cities = | reference = The Tidal Basin is a man-made reservoir located between the Potomac River and the Washington Channel in Washington, D.C. The Basin is part of West Potomac Park, is near the National Mall and is a focal point of the National Cherry Blossom Festival held each spring. The nearby Jefferson Memorial, Martin Luther King Jr. Memorial and Franklin Delano Roosevelt Memorial overlook the Basin, which is south of the Washington Monument.

History

The concept of the Tidal Basin originated in the 1870s to serve both as a visual centerpiece and as a means for flushing the Washington Channel, a harbor separated from the Potomac River by landfills where East Potomac Park is now situated. Colonel Peter Conover Hains of the United States Army Corps of Engineers oversaw the Basin's design and construction.

The Basin was initially named the Tidal Reservoir. It later received the name of Twining Lake to honor Major William Johnson Twining of the Corps of Engineers, who served on the Board of Commissioners of the District of Columbia as its Engineer Commissioner during 1879.

In the Commissioners' annual report to Congress for that year, Major Twining proposed to create the tidal reservoir and use its water to help "flush" the Washington Channel. A 1917 map of Washington that the U.S. Public Buildings Commission prepared shows the Basin with the name "Twining Lake".

West potomac park.jpg|Satellite image of the western portion of the National Mall, the Tidal Basin and West Potomac Park (April 2002). The Washington Channel (not visible) is to the right of the Tidal Basin. The Matthews-Northrup up-to-date map of Washington, D.C. LOC 88693353.tif|1897 map of Washington, D.C., showing the "Tidal Reservoir", the Potomac River and the Washington Channel Tidal Basin photographers and painter.jpg|Tidal Basin between 1909 and 1932 with cherry trees in blossom

Tidal Basin Bathing Beach

In August 1918, the Congressionally funded Tidal Basin Bathing Beach opened in front of the site of the present-day Jefferson Memorial. Although the racially segregated beach was "a place to see people and be seen", a strictly enforced rule prohibited women's bathing suits that stopped more than six inches above the knee.

By one estimate, the beach attracted up to 20,000 people on a July day in 1920. The beach hosted beauty contests until 1922, when a beach official banned the pageants for being too risqué.

Congress had planned to open a separate beach for African-Americans nearby, but southern senators blocked the plan. Rather than integrating the beach, Congress ordered its dismantling in 1925. File:Beauty contest - Tidal Basin in Washington, D.C..jpg|Tidal Basin beauty contest (1919) File:Potomac Tidal Basin female swimmers (cropped).jpg|Female swimmers posing at the Tidal Basin Bathing Beach (1920) File:Orphans at the Tidal Basin.jpg|Orphan girls playing in the Tidal Basin in 1924. A float and a diving platform are in the background. File:26032u.tif|Swimmers and an announcer participating in an event at the Tidal Basin Bathing Beach, with the Washington Monument in the background. (August 1924)

Incidents

The Tidal Basin was the scene of an incident involving the Chairman of the United States House Committee on Ways and Means, Democratic Congressman Wilbur Mills. At 2:00 a.m. on October 7, 1974, Park police stopped Mills' speeding car, whose driver, Albert G. Gapacini, had not turned on its headlights. Also in the car was an Argentine stripper known as Fanne Foxe. After the police stopped the car, Foxe jumped into the nearby Tidal Basin and was rescued. Police stated that both Mills and Foxe were intoxicated and that Mills was bleeding from his nose and scratches on his face.

Design

The Tidal Basin covers an area of about 107 acre and is 10 ft deep. The Army Corps of Engineers designed the Basin to enable it to release 250 e6USgal of water captured at high tide twice a day. The inlet gates, located on the Potomac side of the Basin, allow water to enter the Basin during high tide. During this time, the outlet gates, on the Washington Channel side, close to store incoming water and block the flow of water and sediment into the channel.

As the tide begins to ebb, the general outflow of water from the Basin forces the inlet gates to close. This same force is applied to the outlet gates, which open into the channel. The force of the water running into the channel sweeps away the Basin's built-up silt

The Corps, which maintains the Basin's gates, has restored their functioning.

Recreation

From mid-March until October, paddle-boats are available for rent at a dock near the eastern end of the Tidal Basin.Multiple sources:

  • Coordinates of paddle boat dock: The activity is popular during the Cherry Blossom Festival, which takes place in April.

Future plans

::figure[src="https://upload.wikimedia.org/wikipedia/commons/4/42/Bench_in_water_due_to_flooding_Tidal_Basin_Washington_DC_2024-01-13_09-24-46.jpg" caption="Flooded bench at the Tidal Basin (January 2024)"] ::

Sea level rise and land subsidence has caused portions of the paths next to the water to regularly flood at high tide. To address this problem, the Trust for the National Mall brought together in 2020 five design firms to re-imagine the Tidal Basin's future. After completing an environmental assessment that found that a planned project would have no significant impact "on the natural, cultural or human environment" in the area, the National Park Service (NPS) then announced in 2023 that would renovate approximately linear 6,800 ft of seawall along the Basin and parts of West Potomac Park.Multiple sources:

The Basin's seawall will become 4.75 ft taller and will stand on a new foundation to prevent it from sinking further. The NPS will increase the widths of the walkways around the Basin from the existing 8 ft to a planned 12 ft by enlarging the area's paved surface and reducing its green space. In August 2023, the NPS awarded a $113 million contract to construct the project, which it expected to start in mid-2024 and take three years to reach completion.Multiple sources:

  • In 2024, the National Park Service cut 158 of the nearly 3,700 cherry trees total to rebuild the seawall.

Kutz Memorial Bridge

::figure[src="https://upload.wikimedia.org/wikipedia/commons/c/c1/Kutz_Bridge_-_Independence_Ave_SW-_Washington_DC.jpg" caption="Kutz Memorial Bridge (May 2014)"] ::

The Kutz Memorial Bridge crosses the northern lobe of the Tidal Basin, carrying eastbound Independence Avenue traffic in three lanes. The bridge's name commemorates Brigadier General Charles Willauer Kutz, a Commissioner of Engineering for the District of Columbia during the first half of the 20th century.Multiple sources:

Architect Paul Philippe Cret designed the multi-span plate girder bridge, which the engineering firm of Alexander and Repass constructed. Construction began in 1941 and reached completion in 1943. The bridge was dedicated after alterations in 1954. The structure is made of concrete and steel on pilings with granite facing. It is 433 ft long and 46 ft wide.

Panorama

::figure[src="https://upload.wikimedia.org/wikipedia/commons/7/7a/Tidal_Basin_panorama_-_Washington,_DC.jpg" caption="The Tidal Basin as seen from the [[Franklin Delano Roosevelt Memorial]] in July 2009, showing The [[Washington Monument]] on the left and the [[Jefferson Memorial]] on the right."] ::

Images

File:Washington DC Tidal Basin.jpg|The Tidal Basin at night. File:Tidal Basin blossoms by Matthew Bisanz.JPG|The Tidal Basin and the Jefferson Memorial during the 2010 National Cherry Blossom Festival (March 31, 2010) File:Cherry Blossoms Tidal Basin Washington DC 2024-03-24 18-13-40 1.webm|Cherry blossoms at the Tidal Basin in the afternoon Image:Tidal basin inlet gate.jpg|Inlet gate (November 2011) File:FDR Memorial and Cherry Trees.JPG|Franklin Delano Roosevelt Memorial (April 20, 2008) File:Washington C D.C. Tidal Basin cherry trees.jpg|The Tidal Basin with cherry blossoms (April 1999) File:Cherry blossom tidal basin wall - 2013-04-09 (9985513955).jpg|Tidal Basin cherry blossoms (April 9, 2013) File:National Mall & Memorial Parks (0a548549-dbac-41b7-9726-8b73d7e448a7).jpg|Tidal Basin marina and paddle boat dock (April 2, 2019)

Notes

References

References

  1. Blair, Elizabeth. (October 31, 2020). "Landscape Architects Unveil Plans To Save The National Mall's Tidal Basin". NPR News.
  2. [https://irma.nps.gov/DataStore/DownloadFile/482480 Chapel], p. 32.
  3. [https://irma.nps.gov/DataStore/DownloadFile/482480 Chapel], p. 42.
  4. [https://irma.nps.gov/DataStore/DownloadFile/482480 Chapel], pp. 26, 109.
  5. [https://irma.nps.gov/DataStore/DownloadFile/482480 Chapel], pp. 26–27.
  6. Public Buildings Commission. (1918). "Washington, the Mall and Vicinity: Buildings Occupied By Various Government Activities: 1917". [[United States Senate]].
  7. (August 26, 2018). "Once Upon a Time, the Tidal Basin Was a Swimming Beach". Washingtonian.
  8. Green, Stephen. (1974-10-11). "Mills Admits Being Present During Tidal Basin Scuffle". [[The Washington Post]].
  9. (July 5, 2018). "Tidal Basin, Washington, DC". [[Department of the Interior]]: [[National Park Service]].
  10. Ruane, Michael E.. (August 6, 2012). "Lincoln Memorial Reflecting Pool nearly ready after $34 million reconstruction". [[Washington Post]].
  11. Kennedy, Sarah. (February 17, 2020). "Climate change is coming for the Tidal Basin in Washington, D.C.".
  12. Ramirez, Shania Shelton, Rachel. (2024-03-14). "National Park Service set to remove nearly 160 cherry trees in DC to repair seawall {{!}} CNN Politics".
  13. Coordinates of Kutz Memorial Bridge: {{coord. 38.886948. -77.039395. dim:500

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::

chesapeake-bay-watershedhistoric-american-engineering-record-in-washington,-d.c.landmarks-in-washington,-d.c.potomac-river-watershedreservoirs-in-washington,-d.c.southwest-(washington,-d.c.)