Reservoir report

Rhode-Island reservoirs & dams

Every documented dam and reservoir in Rhode-Island — with normal storage capacity, dam height, max discharge, hazard classification, and drainage area. Sourced from USACE NID and state water-resource agencies.

Dams in Rhode-Island

235

Total storage

224,111ac·ft

High-hazard dams

Updated

May 15

Open the Rhode-Island reservoir layer on the map Every dam and reservoir filtered to Rhode-Island on the interactive map.

Open the map →

May

2026

Reservoir report

Rhode Island has several major reservoirs, including Scituate Reservoir, Big River Reservoir, and Meshanticut Lake. These reservoirs are fed by various streams, rivers, and creeks, including the Pawtuxet River, Blackstone River, and Moswansicut River. The hydrology of the area is influenced by the nearby mountains, including the Berkshires and the Green Mountains. Snowpack in these mountains can contribute to streamflow and water levels in the reservoirs.

In recent years, Rhode Island has experienced both record high and low water levels in its reservoirs. In 2016, Scituate Reservoir reached its highest level in over two decades due to heavy rainfall. However, in 2020, drought conditions led to low water levels in several reservoirs, prompting water restrictions in some areas. Seasonal trends also impact water levels, with typically lower levels in the summer months. Overall, reservoirs and dams provide crucial water resources for Rhode Island and the surrounding areas.

Rhode-Island at a glance

Storage, hazard, and history

How the Rhode-Island dam inventory breaks down -- aggregate stats computed across every documented dam in the state.

Hazard classification

High95
Significant81
Low59

USACE downstream-consequence rating, not failure likelihood.

Notable dams

Tallest Gainer Memorial 109 ft
Oldest Mill Pond 1800
Total storage All Rhode-Island dams 224,111 ac·ft

Built by decade

Most U.S. dams were built mid-20th century during the federal water-development era.

Full inventory

Rhode-Island dams & reservoirs

Every documented dam in Rhode-Island. Sortable by any column; quickly filterable by name. Numeric columns heat-mapped from light to deep based on value. Tap any dam for the full report.

Name	Year built	Normal storage	Dam height	Max discharge	Hazard	Drainage area
Pawtucket Lower	1894	3	4	1,300	Significant	478
Wallum Lake	1866	9,000	7	80	Significant	2
Wilson Reservoir	1866	590	21	395	High	13
Harrisville Pond	1854	56	19	3,200	High	43
Pascoag Reservoir Upper	1860	5,000	27	1,020	High	8
Sucker Pond	1883	278	13	117	Significant	1
Spring Lake	1885	690	8	56	Significant	1
Round Top Pond	1905	50	10	2,076	Low	9
Tarkiln Pond	1886	65	10	915	Low	9
Nichols Pond	1885	77	9	560	Significant	7
Buck Hill Pond	1962	90	13	178	Low	1
Oakland Pond	1850	114	11	4,280	Low	68
Wilbur Pond	1854	56	7	50	High	1
Valley Falls	1859	80	31	17,288	Low	446
Central Falls	1850	98	14	17,300	Low	473
Flat River Reservoir	1873	4,195	20	12,000	High	58
Quidnick Reservoir	1875	684	11	495	Significant	3
Coventry Reservoir	1875	782	12	970	High	3
Tiogue Lake	1875	1,335	9	210	High	2
Arnold Pond	1940	430	13	300	High	4
Waterman Pond	1925	100	5	60	Low	2
Mill Pond	1800	308	19	3,130	Significant	68
Washington Pond Upper	1875	173	12	2,205	Low	68
Upper Pond	1900	40	6	35	Significant	·
Black Rock Reservoir	1885	100	11	262	High	1
Middle Pond	1960	40	10	100	Significant	1
Cranston Print Works Pond	1825	180	17	1,715	High	18
Curran Upper Reservoir	1902	390	27	923	High	1
Curran Lower Reservoir	1950	200	17	650	High	1
Miscoe Lake	1937	226	12	70	High	3
Diamond Hill Reservoir	1971	11,000	76	3,100	High	8
Pawtucket Reservoir	1928	5,125	33	6,700	High	18
Rawson Pond	1885	128	9	1,720	Significant	19
Robin Hollow Pond	1937	208	13	1,680	Significant	27
Happy Hollow Pond	1885	220	15	2,000	Significant	28
Ashton	1885	112	18	19,800	Low	421
Albion	1850	235	18	138,000	Low	411
Manville	1860	254	22	14,000	Low	408
Omega Pond	1918	252	18	4,380	Low	50
James V Turner Reservoir	1934	1,300	22	8,300	High	48
Millbrook Pond	1895	175	7	75	Low	2
Breakheart Pond	1900	250	13	964	Low	6
Boone Lake	1885	295	21	472	High	2
Browning Mill Pond	1885	160	11	2,250	Significant	6
James Pond	1885	86	9	60	Low	1
Metcalf Wildlife Marsh	1963	280	11	340	High	2
Mt. Tom Wildlife Marsh	1964	130	6	94	Low	2
Slocum Reservoir	1855	60	8	281	High	2
Yorker Mill Pond	1855	84	12	236	High	4
Westconnaug Reservoir	1924	1,390	17	220	High	4
Gorham, N. Farm Pond	1973	101	16	217	Significant	1
Hopkins Mill Pond	1865	50	5	·	Low	13
Keech Pond	1952	768	15	435	High	6
Smith + Sayles Reservoir	1865	875	15	785	Significant	8
Mower Pond	1885	234	14	63	Significant	1
Ponaganset Reservoir	1865	2,277	25	130	High	2
Coomer Lake	1885	383	9	800	Significant	3
Burlingame Reservoir Upper	1885	238	10	159	High	2
Cherry Valley Pond	1958	77	8	32	Significant	·
Bowdish Reservoir	1850	706	12	327	High	3
Clarkville Pond	1872	93	14	611	High	4
Hawkins Pond	1865	63	6	240	High	4
Lake Washington	1930	75	6	17	High	·
Wyoming Upper	1885	385	11	2,290	High	59
Wincheck Pond	1885	480	8	135	Significant	3
Yawgoog Pond	1885	924	14	175	High	2
Ashville Pond	1885	116	9	288	Significant	·
Blue Pond	1885	440	13	78	Significant	2
Woodville Pond	1933	97	10	1,104	Low	85
Alton Pond	1920	318	19	5,630	Significant	87
Locustville Pond	1885	530	15	1,497	High	11
Potter Hill	1903	204	10	5,457	Low	204
Long Pond	1885	62	9	73	Low	1
Jamestown Reservoir	1940	117	9	85	Significant	1
Oak Swamp Reservoir	1865	556	7	540	High	1
Simmons Upper Reservoir	1865	384	16	375	High	3
Kimball Reservoir	1924	123	11	127	Significant	1
Greystone	1865	81	7	1,039	Low	39
Almy Reservoir	1865	694	33	2,700	High	2
Simmons Lower Reservoir	1865	264	10	438	High	4
Barney Pond	1885	152	19	1,400	High	7
Olney Pond	1883	1,490	30	88	High	1
Pratt	·	236	12	·	Low	·
Simmons Pond	1800	61	7	550	Significant	1
Watson, Harold E, Reservoir	1960	4,910	34	500	High	4
Nelson Pond	1885	180	17	220	High	1
Gardiner Pond	1885	1,230	20	50	High	2
Easton Pond North	1891	574	14	792	High	4
Easton Pond South	1876	1,225	13	260	High	4
Block Island Rod & Gun Club Pond	1950	55	14	612	Significant	1
Silver Spring Lake	1885	108	12	429	High	2
Wertz + Viall Pond	1957	66	6	284	Low	1
Carr Pond	1800	135	9	165	High	4
Potowomut Pond	1885	54	10	680	Low	23
Belleville Pond	1800	403	8	328	Significant	8
Wenscott Reservoir	1865	280	10	1,067	High	3
Lymansville	1925	120	13	2,730	Low	45
Allendale Pond	1865	43	15	2,226	Low	40
Slatersville Reservoir Upper	1886	1,970	27	12,118	High	89
Slatersville Reservoir Middle	1886	740	26	7,500	High	94
Slatersville Reservoir Lower	1886	208	15	8,550	Significant	94
Forestdale Pond	1883	160	20	5,000	High	96
Woonsocket Reservoir # 3	1895	3,950	27	433	High	3
Ten Mile Reservation	1926	90	10	3,680	Low	45
Lawton Valley Reservoir	1943	1,260	39	2,000	High	3
Sisson Pond	1900	432	14	355	High	·
St Marys Pond	1878	1,040	12	375	High	1
Canada Upper Pond	1915	129	20	600	Significant	2
Cunliff Pond	1885	140	12	80	Significant	5
Horseshoe Falls	1885	196	13	1,067	Significant	93
Wood River Junction	1860	36	10	480	Significant	6
Gainer Memorial	1926	114,000	109	53,520	High	93
Moswansicut Pond	1919	5,466	14	310	Significant	4
Barden Reservoir	1883	2,620	31	4,654	Significant	33
Horseshoe	1920	1,314	10	6,000	Significant	22
Hope	1885	264	19	10,730	Significant	98
Stillwater Reservoir	1918	2,400	20	1,800	High	26
Stillwater Pond	1885	125	18	627	Significant	30
Waterman Lake	1837	2,430	18	4,422	High	9
Slack Reservoir	1885	1,300	15	100	High	2
Sprague Upper Reservoir	1885	281	25	350	High	·
Hawkins Pond	1885	110	10	20	Significant	1
Mountaindale Reservoir	1885	35	10	156	Low	2
Georgiaville Pond	1882	1,300	33	3,773	High	34
Sprague Lower Reservoir	1822	165	15	800	High	1
Peace Dale Pond	1847	270	14	590	High	11
Great Swamp Goose Marsh	1960	570	8	298	Low	·
Glen Rock Reservoir	1860	110	7	371	Significant	33
Indian Lake	1900	733	12	723	Low	8
Nonquit Pond	1943	1,730	8	1,826	Significant	6
Warren Reservoir Upper	1961	106	14	5,733	Significant	5
Fruit Of The Loom	1918	120	10	4,070	Low	197
Gorton Pond	1865	168	7	300	Low	2
Tarbox Pond	1885	210	9	576	Low	2
Eisenhower Lake	1931	280	14	572	Low	4
Carr Pond	1885	1,320	6	·	Low	1
Natick Pond	1886	500	25	4,700	High	182
Arctic	1885	442	28	5,500	High	73
Centerville Pond	1885	310	16	2,700	High	73
Crompton Lower	1885	122	8	4,090	Low	72
Harris Pond	1969	1,050	38	8,500	High	32
Woonsocket Falls Dam	1960	·	21	33,000	Low	369
Woonsocket Falls Dam - Dikes 1 And 2	1960	·	9	·	Low	369
Union Mill Pond	1883	45	7	425	Significant	9
Ross Pond	·	10	6	40	Significant	·
Carolina Pond	1840	85	10	1,640	Low	97
Quidnick Pond Upper	·	42	17	3,360	Low	69
Harris Pond	1882	60	24	6,000	Low	102
Arkwright Pond	·	40	21	6,667	Low	102
Pearce Pond	1903	12	10	115	High	·
Hopkins Farm Pond	1964	9	8	151	Significant	·
Nye Farm Pond	1965	40	12	302	Low	·
Stone Pond	·	25	8	110	High	·
Meshanticut Park Pond	·	35	8	38	Significant	·
Clarke's Pond Upper	·	3	10	180	High	·
Greenwich Bleachery Pond	·	48	18	480	Low	4
Gale Farm Pond Upper	1950	15	11	68	Significant	·
Bucklin Point	1950	7	19	85	High	·
Edward's Pond	·	10	9	245	Significant	2
Dolly Pond	·	35	9	91	Low	2
Wakefield Pond	·	175	8	285	Low	1
Spear Pond	·	5	11	·	High	2
Snakeskin Pond	·	22	8	184	Significant	2
Sucker Brook Bridge Pond	·	9	13	242	Significant	3
Factory Mutual Research Ctr Lower Pond	1948	75	24	800	Low	2
Durfee Hill Wildlife Marsh #2	1965	45	8	55	Significant	·
Lake Aldersgate	·	66	6	35	Significant	·
Wright, T. Farm Pond	1973	6	11	65	Significant	·
David King Farm Pond	1974	15	13	77	Significant	·
Bethel Pond	·	38	11	1,476	Low	29
Harris Pond	·	2	5	·	Significant	1
Langworthy Pond	·	2	9	35	Significant	·
Hoxie Farm Pond	1951	21	5	110	Significant	·
Jamestown Lower Reservoir	·	18	12	225	Significant	2
Belknap Pond	·	6	8	21	Significant	1
Pocasset Pond	1951	13	9	297	Significant	3
Hughesdale Pond Upper	·	50	22	290	High	3
Caesarville Pond	·	8	6	505	Significant	2
Dexter Farm Pond	1966	4	11	79	Significant	·
Butterfly Pond	1883	20	8	855	High	5
Moffett Pond	1883	4	10	147	High	5
Bleachery Pond	1883	20	8	1,375	High	7
Handy Pond Upper	·	45	12	75	High	1
Limerock Reservoir	·	180	28	380	High	1
Hamilton Reservoir	·	45	10	730	Significant	7
Todd's Pond	·	41	10	143	Low	1
Woonsocket Reservoir # 1	1883	105	41	2,200	High	8
Pawtucket Upper	1800	45	15	20,700	Low	474
Wanskuck Pond	1882	50	14	1,027	Low	8
Manton Mill Pond	1945	22	10	3,315	Low	46
White's Pond	·	9	8	·	High	2
Jordan Pond	·	50	22	290	Significant	4
Peeptoad Pond	·	36	11	620	Significant	4
Pine Swamp Reservoir #1	·	18	4	30	Significant	1
Hopkins Pond	·	10	9	325	High	2
Stillwater Mill Pond	·	35	15	1,051	Low	11
Greenville Mill Pond	·	60	16	420	Low	10
Capron Pond	·	40	13	2,354	Low	30
Bridlewood Pond	·	10	7	·	High	·
State Street Pond	1988	5	8	·	Significant	·
Asa Pond	·	98	10	600	High	5
Hefler Farm Pond	1972	5	11	105	High	2
Wakefield Pond	·	20	9	2,060	High	16
Warren Reservoir Lower	1883	78	8	1,956	Low	5
Camp Warwick Pond	1954	6	15	55	High	·
Hazard Pond	·	170	7	100	Low	10
Royal Mills	1861	15	21	6,100	High	73
Bouchar Farm Pond	1951	22	7	22	Significant	·
Sylvester Pond	1922	70	24	113	Low	3
Rocky Brook Reservoir	·	25	8	·	Significant	3
Barberville Pond	1882	120	11	1,523	Significant	55
Mill Pond	1900	10	5	54	Significant	4
Indian Run	·	0	10	·	Significant	·
Rodman Mill	·	0	·	·	High	·
Holley Lane Pond	·	0	8	·	High	·
Centre Of New England #1	·	0	8	·	Significant	·
Shoestring Mill	·	0	20	·	Significant	·
Bridlewood Upper End	·	0	5	·	High	·
Daves Marketplace	·	0	·	·	Significant	·
Slocum Woods	1993	0	·	·	High	·
Secret Lake	·	0	·	·	Significant	·
Shady Lea Mill	·	0	·	·	High	·
Slocum Road Upper	·	0	·	·	High	·
Bowdish Lower	·	0	·	·	High	·
Sprague Pond	·	0	12	·	Significant	·
Creamer	·	0	·	·	High	·
Adamsville Pond	·	0	·	·	Significant	·
Cross Mills	·	0	·	·	Significant	·
Louisquisset Flood Control	·	0	·	·	High	·
Melville #1	·	0	·	·	Significant	·
Grist Mill Apartments	·	0	16	·	High	·
Mill	·	0	8	·	Significant	·
Ocean State Power	·	50	36	23	High	28
Stafford	·	1,000	5	·	Significant	2
Blackstone	·	58	12	·	Low	261

Reservoir FAQ

About Rhode-Island dams & reservoirs

Where does the Rhode-Island dam data come from?

The U.S. Army Corps of Engineers National Inventory of Dams (NID) plus state water-resource agencies. Snoflo joins these public records with live USGS streamgauge readings downstream where available. The NID is the canonical federal dam registry.

What does Hazard Potential mean?

USACE classifies every dam by what would happen if it failed: Low (no loss of life expected, minimal economic damage), Significant (no loss of life but economic, environmental, or lifeline damage), High (loss of life expected). It's a downstream-consequence rating, not a likelihood of failure.

What is Normal Storage in acre-feet?

The volume of water the reservoir holds at its normal operating level, measured in acre-feet. One acre-foot is about 325,851 gallons or 1,233 cubic meters — the amount needed to cover one acre to a depth of one foot.

Why are some Rhode-Island dams missing storage or height data?

USACE NID records can have gaps for small or older dams that pre-date federal reporting requirements. Snoflo surfaces whatever the canonical record contains. If a dam you care about has incomplete data, contact the operating agency or USACE for updates.

Can I see live water levels?

Yes — tap any dam name to open its detail page, which pulls live storage data from USGS streamgauges or operating-agency feeds where available. Historical levels and seasonal averages are also shown.

Why does Rhode-Island have so many dams?

The U.S. has over 90,000 dams — most built between 1930 and 1980 during the federal water-development era. Rhode-Island's count reflects a combination of agricultural irrigation needs, flood control, hydropower, and recreation. The "Built by decade" chart above shows the timeline.