View source for Croton Aqueduct

{{short description|19th-century aqueduct serving New York City}}
{{for|the current aqueduct which superseded this one|New Croton Aqueduct}}
{{Use mdy dates|date=August 2023}}
{{Infobox NRHP
| name = Old Croton Aqueduct
| nrhp_type = nhl
| image = 45 William England - High Bridge, Harlem River, New York.jpg
| caption = The Croton Aqueduct at [[High Bridge (New York City)|High Bridge]] in 1859
| district_map = Croton-aqueduct-en.png
| map_alt = Located in New York State along the Hudson River, starting at Croton, ending in Manhattan
| map_caption = Location of Croton Aqueduct
| nearest_city = [[New York City, New York]]
| area = 
| built = 1837–1842
| architect = [[John B. Jervis]]; David Douglass; [[James Renwick Jr.]]
| designated_nrhp_type = April 27, 1992<ref name="nhlsum">{{cite web
 |url=http://tps.cr.nps.gov/nhl/detail.cfm?ResourceId=1468&ResourceType=Structure 
 |title=Croton Aqueduct (Old) 
 |date=September 17, 2007 
 |series=National Historic Landmark summary listing 
 |work=National Park Service 
 |url-status=dead 
 |archive-url=https://web.archive.org/web/20140813120716/http://tps.cr.nps.gov/nhl/detail.cfm?ResourceId=1468&ResourceType=Structure 
 |archive-date=2014-08-13 
}}</ref>
| added = December 2, 1974<ref name="nris">{{NRISref|2007a}}</ref>
| refnum = 74001324
| designated_other1 = New York State Register of Historic Places
| designated_other1_number = 11912.000082
| designated_other1_num_position = bottom
| designated_other1_abbr = NYSRHP
| designated_other1_date = June 23, 1980
}}
The '''Croton Aqueduct''' or '''Old Croton Aqueduct''' was a large and complex [[water supply network|water distribution system]] constructed for [[New York City]] between 1837 and 1842. The great [[aqueduct (water supply)|aqueducts]], which were among the first in the [[United States]], carried water by [[gravity]] {{convert|41|mi|km}} from the [[Croton River]] in [[Westchester County]] to [[reservoir]]s in [[Manhattan]]. It was built because local water resources had become polluted and inadequate for the growing population of the city. Although the aqueduct was largely superseded by the [[New Croton Aqueduct]], which was built in 1890, the Old Croton Aqueduct remained in service until 1955.<ref name="Aqueduct NRHP nom">{{cite book|last=Rennenkampf|first=Lenore|url=https://catalog.archives.gov/id/75322997|title=National Register of Historic Places nomination, Old Croton Aqueduct|series=File Unit: National Register of Historic Places and National Historic Landmarks Program Records: New York, 1964 - 2013|publisher=[[U.S. National Archives]]|date=November 1973|access-date=January 7, 2020}}</ref>

==Background==
The island of Manhattan, surrounded by [[brackish water|brackish]] rivers, had a limited supply of freshwater available. It dwindled as the city grew rapidly after the [[American Revolutionary War]], and freshwater sources became polluted by [[effluent]]. Before the aqueduct was constructed, residents of New York obtained water from [[cistern]]s, wells, natural springs, and other bodies of water. Rapid population growth in the 19th century and encroachment on these areas as Manhattan moved further north of [[Wall Street]], led to the pollution of many local fresh water sources.  Below [[Grand Street (Manhattan)|Grand Street]], a small number of well-off customers of the [[Manhattan Company]] had fresh water delivered to them, but that company was actually more focused on banking—it eventually became [[Chase (bank)|Chase Manhattan]]—and only paid as much attention to its water activities as it needed to avoid losing the state charter that allowed it to bank.<ref>{{cite gotham}} pp. 360, 362, 589</ref> The poor and the rest of the city were forced to rely on well water, often made palatable by adding alcoholic spirits, prompting [[temperance movement|temperance]] campaigners to call for the municipal provision of water.

The unsanitary conditions caused an increase in disease. Epidemics of [[yellow fever]] ravaged the city. A polluted aquifer, overcrowded housing, the lack of sewers, public ignorance of basic sanitary conditions, and the existence of polluting industries near wells and residential areas contributed to an unprecedented mortality rate of 2.6% (1 death per 39 inhabitants) in 1830. Then in 1832 [[cholera]] first reached New York in the deadliest epidemic to that date. The need for a new supply of fresh water was crucial.

==Construction==
[[File:DoubleArch1907.jpg|thumb|left|Double Arch over Sing Sing Kill, [[Ossining (village), New York|Ossining]], from a 1907 postcard; upper arch carries the aqueduct, the lower one carries a local street]]

In March 1833, Major [[David Bates Douglass]], engineering professor at [[West Point Military Academy]], was appointed to survey and estimate the proposed route.<ref name="VCPk-Restoration-1986-Pt1">{{cite web|url=http://s-media.nyc.gov/agencies/lpc/arch_reports/98_A.pdf|title=Van Cortlandt Park, Borough of the Bronx: Restoration Master Plan|date=1986|publisher=[[New York City Parks Department]], Storch Associates|access-date=January 8, 2017}}</ref>{{rp|46}} In 1837, construction began on a massive engineering project, to divert water from sources upstate, following a route surveyed by Douglass<ref>''A Trail through History'' (Old Croton Aqueduct Staste Park brochure).</ref> and supervised by Douglass' successor, Chief Engineer [[John B. Jervis]].<ref name=Trail>{{cite web |url=http://www.nycgovparks.org/sub_your_park/virtual_tour/croton_aqueduct/index.html |title=Old Croton Aqueduct Trail |work=[[New York City Department of Parks and Recreation]] |access-date=September 19, 2007}}</ref> The [[Croton River]] was dammed, aqueducts were built, tunnels dug, piping laid, and reservoirs created.

The [[Gravity feed|gravity-fed]] aqueduct dropped 13 inches per mile, 1/4" per 100' (~0.02%). An elliptical tube,  8.5 feet (2.6m) high by 7.5 feet (2.3m) wide, of iron piping encased in brick masonry was laid, sometimes in cuts, with conical ventilating towers every mile or so, to relieve pressure and keep the water fresh. [[Hydraulic cement]] was added where the aqueduct crossed rivers. It extended from the [[Old Croton Dam]] in northern [[Westchester County, New York|Westchester County]] to the [[Harlem River]], where it continued over the [[High Bridge (New York City)|High Bridge]] at 173rd Street and down the West Side of Manhattan and finally into a Receiving Reservoir located between [[79th Street (Manhattan)|79th]] and [[86th Street (Manhattan)|86th]] streets and [[Sixth Avenue (Manhattan)|Sixth]] and [[Seventh Avenue (Manhattan)|Seventh]] Avenues; the site is now the [[Great Lawn and Turtle Pond, Central Park|Great Lawn and Turtle Pond in Central Park]].<ref>{{cite web |url=http://www.centralparknyc.org/visit/things-to-see/great-lawn/great-lawn.html |title=Great Lawn |work=[[Central Park Conservancy]] |access-date=October 6, 2011 |archive-date=September 25, 2011 |archive-url=https://web.archive.org/web/20110925174555/http://www.centralparknyc.org/visit/things-to-see/great-lawn/great-lawn.html |url-status=dead }}</ref> The Receiving Reservoir was a rectangular tank within fortress-like [[Rustication (architecture)|rusticated]] retaining walls, {{convert|1826|ft|m}} long and {{convert|836|ft|m}} wide; it held up to {{convert|180|e6gal|m3}} of water. {{convert|35|e6gal|m3}} flowed into it daily from northern Westchester. 

[[File:Profile and Ground Plan of the Lower Part of Croton Aqueduct.jpg|thumb|right|600px|Profile and ground plan of the lower part of Croton Aqueduct]]

From the Receiving Reservoir, water flowed down to the [[Croton Distributing Reservoir]], better known simply as the '''Croton Reservoir''', a similar fortified tank located on [[Fifth Avenue (Manhattan)|Fifth Avenue]] between [[40th Street (Manhattan)|40th Street]] and [[42nd Street (Manhattan)|42nd Street]], where the [[New York Public Library Main Branch]] and [[Bryant Park]] are located today.  This reservoir was built to resemble [[ancient Egyptian architecture]]. New Yorkers came uptown for the fine view of the city obtained from atop its walls.

The aqueduct opened to public use with great fanfare on October 14, 1842. The day-long celebration culminated in a fountain of water that spouted to a height of 50 feet (15 m) from the beautifully decorated cast iron Croton Fountain in [[City Hall Park]]. 

[[File:Crotonreservoir42ndstnyc.jpg|left|thumb|[[Croton Distributing Reservoir]] (1842)]]

==Impact on the city==
Water started flowing through the aqueduct on June 22, 1842, taking 22 hours for gravity to take the water the 41 miles (66&nbsp;km) (at a velocity of {{convert|1.86|mph|km/h ft/s|disp=sqbr}}) to reach Manhattan.<ref name=Trail/> Even though only 6,175 houses had been connected to the system by 1844, the Croton water had already dramatically improved both domestic hygiene and interior design. Baths and running water were being built in the private homes of wealthy New Yorkers, and public bathing facilities were constructed for the masses. The water system had another inadvertent consequence. The decline in the number of residents drawing water from the city's wells resulted in a rise in the water table, which flooded many cellars. To address this problem, the city built sewers in many residential streets. By 1852, {{convert|148|mi|km}} of sewers had already been constructed.

About this time the [[German cockroach]] attracted attention and was called the "Croton bug" in the mistaken belief that the aqueduct brought the insects into the homes being connected to the new water supply system.<ref>[http://www.phobus.com/insect-information/cockroach_insect_information_and_pictures.html Cockroach insect information & pictures]. Retrieved November 29, 2006.</ref>

Despite its size, the capacity of the Old Croton Aqueduct could not keep up with the growth of New York City, and construction on a [[New Croton Aqueduct]] began in 1885 a few miles east. The new aqueduct, buried much deeper than the old one, went into service in 1890, with three times the capacity of the Old Croton Aqueduct. It currently supplies 10 percent of New York City's water. The Croton Receiving Reservoir continued to supply New York City with drinking water until 1940, when Commissioner of Parks and Recreation [[Robert Moses]] ordered it drained and filled to create the [[Great Lawn and Turtle Pond]] in [[Central Park]]. The old aqueduct remained in service until 1955. In 1987 the northernmost portion was reopened to provide water to [[Ossining (town), New York|Ossining]].<ref>{{cite web |url=http://aqueduct.org/engineering-marvel |title=An Engineering Marvel |work=Friends of the Old Croton Aqueduct |date=15 January 2009 |access-date=September 16, 2012}}</ref>

==Reused portions==
===Old Croton Trail===
{{Infobox hiking trail
|name=Old Croton Trail
|location=[[Westchester County, New York]], U.S.
|length_mi=26.2
|trailheads=[[Van Cortlandt Park]], [[New York (state)|New York]]<br/>[[Croton Gorge Park]], [[New York (state)|New York]]
|use=[[Hiking]], [[Biking]], [[Jogging]]
|elev_change=
|highest=
|lowest=
|difficulty=Easy
|season=Year round
|sights=[[Lyndhurst (house)|Lyndhurst]]
|hazards=[[Poison ivy]], uneven grades, rough or muddy trail surface, at-grade road intersections.
}}
The '''Old Croton Trail''' extends for {{Convert|26.2|mi|km|1}} in [[Westchester County, New York|Westchester County]], providing public access along all but four segments &mdash; in the [[Getty Square]] neighborhood of downtown [[Yonkers]], [[Tarrytown, New York|Tarrytown]], [[Scarborough, New York|Scarborough]] and [[Ossining (village), New York|Ossining]] &mdash; along the route of the aqueduct. It crosses the lawn of [[Lyndhurst (Jay Gould Estate)|Lyndhurst]], following the aqueduct's easement. The trail enters New York City on the eastern side of [[Van Cortlandt Park]]<ref name=Trail/> and runs through the [[Bronx]] alongside Aqueduct Avenue, and the trail continues under the southern part of University Avenue. 
[[File:The Old and New Croton Aqueduct System 1887.jpg|thumb|left|1887 engraving from [[Scientific American]] shows Old Croton Aqueduct in dotted line looking south from [[Putnam County, New York|Putnam County]]. [[New Croton Reservoir|Croton Reservoir]] in foreground; Manhattan in far background.]]

Both the trail and the tunnel are part of the '''Old Croton Aqueduct State Historic Park''',<ref>{{cite web |url=http://nysparks.state.ny.us/parks/96/details.aspx |title=Old Croton Aqueduct State Historic Park |work=New York State Office of Parks, Recreation and Historic Preservation |access-date=October 6, 2011 |archive-url=https://web.archive.org/web/20111105031303/http://www.nysparks.state.ny.us/parks/96/details.aspx |archive-date=November 5, 2011 |url-status=dead }}</ref> which was created in 1968 and encompasses the northernmost {{convert|26|mi}} of the aqueduct and its [[Right-of-way (transportation)|right-of-way]], from [[Croton Gorge Park]] to the Yonkers-New York City line. It lies wholly within Westchester County but is under the jurisdiction of the Taconic Region of the [[New York State Office of Parks, Recreation and Historic Preservation]].<ref>{{cite web |url=http://www.aqueduct.org/node/12 |title=History of the Aqueduct Trail |work=Friends of the Old Croton Aqueduct |access-date=October 6, 2011 |archive-url=https://web.archive.org/web/20111008114922/http://www.aqueduct.org/node/12 |archive-date=October 8, 2011 |url-status=dead }}</ref>

The trail runs roughly parallel to [[Hudson Line (Metro-North)|Metro North's Hudson Line]] from northern [[Yonkers, New York|Yonkers]] to [[Scarborough, New York|Scarborough]] and is accessible from numerous stations on that line.  The trail briefly parallels the [[Rockefeller State Park Preserve]] and its trails. Access to the trail is easiest where it crosses [[Route 9 (New York)|Route 9]], known variously as Albany Post Road, Broadway, or Highland Avenue.

Heading southbound into downtown Yonkers, the trail goes on-street at Bishop William J. Walls Place and N. Broadway, where it follows the sidewalk on N. Broadway for one block, and then makes a left onto Ashburton Avenue going east.  At Palisades Avenue, it makes a right and the trail bed restarts.

Remnants of the aqueduct still exist and can be seen along the trail, including 21 stone ventilators, three stone weirs (chambers which were used to empty the aqueduct for maintenance), and one "Keeper's House" located in [[Dobbs Ferry, New York|Dobbs Ferry]].<ref>{{cite web |url=http://parks.ny.gov/parks/attachments/OldCrotonAqueductOldCrotonAqueductTrailMap.pdf |title=Old Croton Aqueduct Trail Map |work=New York State Office of Parks, Recreation and Historic Preservation |access-date=April 2, 2016}}</ref> The Keeper's House in Dobbs Ferry was built in 1857 and is the only remaining of four Keeper's Houses that is both on the aqueduct and open to the public.  The only other remaining Keeper's House is located in Ossining, but it was moved off the aqueduct, is privately owned, and is not open to visitors.<ref name=DEP_KeepersHouse>{{cite web |url=http://home.nyc.gov/html/dep/html/press_releases/15-099pr.shtml |title=DEP Donates Century-Old Valve Actuator from New Croton Dam for Permanent Display at Education Center |publisher=New York City Department of Environmental Protection |date=December 9, 2015 |access-date=April 2, 2016}}</ref> A portion of the Old Croton Aqueduct, running from the Croton River to Manhattan, was listed as a [[National Historic Landmark]] in 1992.<ref name="nhlsum"/><ref name="nrhpinv">{{Cite journal|url={{NHLS url|id=74001324}}|title=National Register of Historic Places Registration: Croton Aqueduct|first=Robie S.|last=Lange|date=October 1991|publisher=National Park Service}} and {{NHLS url|id=74001324|title=Accompanying 20 photos and drawings, from 1978 and 1843.|photos=y}}&nbsp;{{small|(6.95&nbsp;MB)}}</ref>  The Croton Water Supply System was also designated as a [[List of historic civil engineering landmarks|National Historic Civil Engineering Landmark]] by the [[American Society of Civil Engineers]] in 1975.<ref>{{cite web |url=http://www.ascemetsection.org/committees/history-and-heritage/landmarks/croton-water-supply |title=Croton Water Supply System |work=ASCE Metropolitan Section |access-date=November 12, 2016}}</ref>

The interior of the Old Croton Aqueduct has been documented by explorers including [[Miru Kim]] and historian Steve Duncan.<ref>{{cite news |title=Children of Darkness |first=Ben |last=Gibberd |url=https://www.nytimes.com/2007/07/29/nyregion/thecity/29shad.html |newspaper=The New York Times |date=July 29, 2009 |access-date=September 15, 2009}}</ref>

===Aqueduct Walk===
{{Main|Aqueduct Walk}}
[[Aqueduct Walk]] is a community park in [[the Bronx]], New York City, running between Kingsbridge Road and [[Tremont Avenue]].<ref name="nyc parks">{{Cite web |title=Aqueduct Walk Highlights: NYC Parks |url=https://www.nycgovparks.org/parks/aqueduct-walk/highlights |access-date=2022-06-08 |website=www.nycgovparks.org}}</ref> Aqueduct Walk is designated as an official [[New York City scenic landmark]].<ref name="Moloney 2024 b585">{{cite web | last=Moloney | first=Síle | title=LPC Designates Aqueduct Walk as Bronx’s First Scenic Landmark in Unanimous Vote | website=Norwood News - Serving Norwood, Bedford Park, Fordham and University Heights | date=April 19, 2024 | url=https://www.norwoodnews.org/lpc-designates-aqueduct-walk-as-bronxs-first-scenic-landmark-in-unanimous-vote/ | access-date=April 20, 2024}}</ref><ref name="CityLand 2024 o138">{{cite web | title=Landmarks Designates the Old Croton Aqueduct Walk as the Bronx's First Scenic Landmark | website=CityLand | date=April 17, 2024 | url=https://www.citylandnyc.org/landmarks-designates-the-old-croton-aqueduct-walk-as-the-bronxs-first-scenic-landmark/ | access-date=April 20, 2024}}</ref>

==Gallery==
<gallery class="center" widths="195" heights="187" classes="center">
File:HarpersWeeklyIllustrShuttingOffTheCroton11121881 crop.jpg|"Shutting off the Croton", from ''[[Harper's Weekly]]'' (November 12, 1881)
File:Weir chamber Sleepy Hollow.jpg|A weir in [[Sleepy Hollow, New York|Sleepy Hollow]]. The weir chambers were used to empty the aqueduct for maintenance by diverting the waters to a nearby waterway.  The line could be emptied in two hours.<ref>Descriptive display at the weir chamber in [[Ossining (village), New York|Ossining, New York]] in the Old Croton Aqueduct State Historic Park.  Accessed: September 6, 2010</ref>
File:Crotonwalkfordjeh.JPG|Croton Walk, south of Kingsbridge Road, [[Bronx]]
File:Croton W119 Gatehouse jeh.JPG|119th Street [[gatehouse (waterworks)|gatehouse]], Manhattan
File:Keeper's House.jpg|1857 Keeper's House in [[Dobbs Ferry, New York|Dobbs Ferry]]; open to the public.
File:OldCrotonAqueductInside.jpg|Inside the Old Croton Aqueduct at the weir in [[Ossining, New York (town)|Ossining]]
File:Ossining Weir - aqueduct with hydraulic cement lining on the portion inside a viaduct.jpg|A section of aqueduct inside a viaduct with hydraulic cement lining
File:Ossining Weir - brick walls and exposed ceiling.jpg|A section of aqueduct with brick walls and exposed ceiling
File:Ossining Weir - gate to close off the aqueduct.jpg|A gate at Ossining Weir to close the aqueduct off for maintenance
File:Ossining Weir - valve.jpg|A valve at Ossining Weir to redirect water out of the aqueduct
File:Croton Aqueduct Tower 16 Irvington New York.jpg|Ventilator No. 16, [[Irvington, New York]] (May 2005)
File:135th St Croton Aquaduct gatehouse.jpg|alt=135th St Croton Aqueduct Gatehouse in New York City has a brick two story octagonal tower with stone work at its base|135th St Croton Aqueduct Gatehouse in New York City is listed on the National Register of Historic Places
</gallery>

==See also==
* [[Croton Aqueduct Gate House]]
* [[List of National Historic Landmarks in New York]]
* [[National Register of Historic Places listings in northern Westchester County, New York]]
* [[National Register of Historic Places listings in southern Westchester County, New York]]
* [[New York City water supply system]]

==Notes==
{{reflist}}

==References==
*{{Cite book |editor-last=Chazin |editor-first=Daniel D. |title=New York Walk Book |edition=7th |publisher=New York-New Jersey Trail Conference |date=2005 |isbn=978-1-880775-30-1}}
*{{Cite book |last=Koeppel |first=Gerard T. |author-link=Gerard T. Koeppel |title=Water for Gotham: A History |publisher=[[Princeton University Press]] |location=Princeton, N.J. |date=2000 |isbn=0-691-01139-7}}
*{{Cite news |last=Rappole |first=George H. |title=The Old Croton Aqueduct |journal=[[IA, The Journal of the Society for Industrial Archeology]] |volume=4 |issue=1 |date=1978 |pages=15–25 |jstor=40967954}}

==External links==
{{commons category}}
* [https://web.archive.org/web/20190306042835/https://www1.nyc.gov/html/dep/html/drinking_water/history.shtml NYC GOV Water System History]
* NYC GOV New York City's Water Story [http://www.nyc.gov/html/dep/pdf/environmental_education/new-york-citys-water-story.pdf] {{Webarchive|url=https://web.archive.org/web/20181202205735/https://www1.nyc.gov/html/dep/pdf/environmental_education/new-york-citys-water-story.pdf |date=2018-12-02 }}
*[https://www.nytimes.com/2017/12/04/nyregion/croton-aqueduct-burr-hamilton.html  "How a Massive Public Works Project Saved a Parched New York,"  by SAM ROBERTS, New York Times, December 4, 2017]
*[http://nysparks.com/parks/96/details.aspx Old Croton Aqueduct State Historic Park]
*[http://www.aqueduct.org Friends of the Old Croton Aqueduct]
*[http://www.nycgovparks.org/sub_your_park/virtual_tour/croton_aqueduct/index.html NYC Segment according to the NYC Department of Parks and Recreation]
*[https://www.asce.org/about-civil-engineering/history-and-heritage/historic-landmarks/croton-water-supply-system ASCE History and Heritage of Civil Engineering - Croton Water Supply System]
*[http://www.1902encyclopedia.com/A/AQU/aqueduct-11.html "Croton Aqueduct"] in 1902 Encyclopedia
*[https://web.archive.org/web/20120328231205/http://www.scientificamericanpast.com/Scientific%20American%201890%20to%201899/1/lg/sci7121890.htm  "The New Croton Aqueduct New York"] ''[[Scientific American]]'' (1890-07-12)
*[http://cdm16694.contentdm.oclc.org/cdm/landingpage/collection/p16694coll17 John B. Jervis Drawings Collection of the Jervis Public Library on New York Heritage Digital Collections]
*[http://www.hrvh.org/exhibit/hhhcfortorange/intro.pdf Account of the New York Guard protection of the aqueduct in World War I] {{Webarchive|url=https://web.archive.org/web/20141129041043/http://www.hrvh.org/exhibit/hhhcfortorange/intro.pdf |date=November 29, 2014 }}
{{hidden begin|toggle=left|title=[[Historic American Engineering Record]] (HAER) documentation}}
*{{HAER |survey=NY-120 |id=ny1181 |title=Old Croton Aqueduct, New York, New York County, NY |photos=53 |dwgs=1 |data=185 |cap=7 |link=no}}
*{{HAER |survey=NY-119 |id=ny1175 |title=Old Croton Aqueduct, Harlem River Crossing, Spanning Harlem River, Bronx, Bronx County, NY |photos=13 |data=2 |cap=2 |link=no}}
*{{HAER |survey=NY-117 |id=ny1174 |title=Old Croton Aqueduct, Quarry Railroad Bridge, Aqueduct Lane at Williams Street, Hastings-on-Hudson, Westchester County, NY |photos=3 |data=2 |cap=1 |link=no}}
*{{HAER |survey=NY-110 |id=ny1178 |title=Old Croton Aqueduct, Sing Sing Kill Bridge, Spanning Aqueduct Street & Broadway, Ossining, Westchester County, NY |photos=18 |dwgs=4 |data=2 |cap=2 |link=no}}
*{{HAER |survey=NY-112 |id=ny1176 |title=Old Croton Aqueduct, Mill River Culvert, U.S. Route 9 at Sleepy Hollow Cemetery, Tarrytown, Westchester County, NY |photos=7 |color=1 |dwgs=3 |data=3 |cap=2 |link=no}}
*{{HAER |survey=NY-113 |id=ny1177 |title=Old Croton Aqueduct, Mill River Waste Weir, U.S. Route 9 at Sleepy Hollow Cemetery, Tarrytown, Westchester County, NY |photos=5 |dwgs=3 |data=2 |cap=1 |link=no}}
*{{HAER |survey=NY-114 |id=ny1173 |title=Old Croton Aqueduct, Jewels Brook Culvert, Spanning Station Road, Irvington, Westchester County, NY |photos=8 |dwgs=4 |data=2 |cap=1 |link=no}}
*{{HAER |survey=NY-115 |id=ny1170 |title=Old Croton Aqueduct, Overseer's House, Walnut Street, Dobbs Ferry, Westchester County, NY |dwgs=2 |link=no}}
*{{HAER |survey=NY-116 |id=ny1171 |title=Old Croton Aqueduct, Maintenance Building, Walnut Street, Dobbs Ferry, Westchester County, NY |dwgs=1 |link=no}}
*{{HAER |survey=NY-118 |id=ny1168 |title=Old Croton Aqueduct, Saw Mill River Culvert, Spanning Nepperhan Avenue, Yonkers, Westchester County, NY |photos=19 |dwgs=3 |data=5 |cap=2 |link=no}}
*{{HAER |survey=NY-207 |id=ny1619 |title=Old Croton Aqueduct, Ventilator No. 10, North of Scarborough Road, Briarcliff Manor, Westchester County, NY |photos=1 |cap=1 |link=no}}
*{{HAER |survey=NY-208 |id=ny1620 |title=Old Croton Aqueduct, Ventilator No. 18, South of Main Street, Irvington, Westchester County, NY |photos=1 |cap=1 |link=no}}
*{{HAER |survey=NY-111 |id=ny1179 |title=Old Croton Aqueduct, Ventilator No. 9, Spring & Everett Streets, Ossining, Westchester County, NY |photos=1 |color=1 |dwgs=1 |data=3 |cap=2 |link=no}}
*{{HAER |survey=NY-109 |id=ny1167 |title=Old Croton Aqueduct, Northern Waste Weir, Snowden Avenue & Van Wick Street, Ossining, Westchester County, NY |photos=4 |dwgs=2 |data=2 |cap=1 |link=no}}
*{{HAER |survey=NY-108 |id=ny1172 |title=Old Croton Aqueduct, Indian Creek Culvert, Reservoir & Quaker Bridge Roads, Crotonville, Ossining, Westchester County, NY |photos=5 |dwgs=3 |data=2 |cap=1 |link=no}}
*{{HAER |survey=NY-107 |id=ny1169 |title=Old Croton Aqueduct, Entrance Entablature, New Croton Reservoir, Yorktown Heights, Westchester County, NY |photos=1 |dwgs=1 |data=2 |cap=1 |link=no}}
*{{HAER |survey=NY-132 |id=ny1163 |title=New Croton Dam & Reservoir, Croton River, Croton-on-Hudson, Westchester County, NY |photos=22 |color=7 |data=3 |cap=3 |link=no}}
{{hidden end}}

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[[Category:Aqueducts in New York (state)]]
[[Category:Buildings and structures on the National Register of Historic Places in Manhattan]]
[[Category:Hiking trails in New York (state)]]
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[[Category:Transportation buildings and structures in Westchester County, New York]]
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[[Category:Aqueducts on the National Register of Historic Places]]
[[Category:Transportation buildings and structures on the National Register of Historic Places in New York (state)]]
[[Category:National Historic Landmarks in New York (state)]]
[[Category:New York State Register of Historic Places in Westchester County]]
[[Category:New York State Register of Historic Places in Bronx County]]
[[Category:New York State Register of Historic Places in New York County]]