Haviland-Davison Grist Mill is a historic grist mill located at East Rockaway in Nassau County, New York.
 It was restored and relocated to its present site in Memorial Park in 1963.
 It was built about 1689 and is a 2 ⁄ -story, "T" shaped, timber frame building.
 The original section has one large addition and two smaller wings attached to each side.
Bramanville Mill, also known as Chickering Grist Mill, is a historic grist mill located at Cobleskill in Schoharie County, New York.
Great Valley Mill, also known as the Old Grist Mill in the Great Valley, is a historic grist mill located in Tredyffrin Township, Chester County, Pennsylvania.
 It was built in 1859, and is a four-story, rectangular banked stuccoed fieldstone structure.
 It measures 42 feet by 45 feet, 6 inches, and has a gable roof.
Great Neck is a region on Long Island, New York, that covers a peninsula on the North Shore of Long Island, which includes the villages of Great Neck, Great Neck Estates, Great Neck Plaza, and others, as well as an area south of the peninsula near Lake Success and the border territory of Queens.
 The incorporated village of Great Neck had a population of 9,989 at the 2010 census, while the larger Great Neck area comprises a residential community of some 40,000 people in nine villages and hamlets in the town of North Hempstead, of which Great Neck is the northwestern quadrant.
 Great Neck has five ZIP Codes (11020–11024), and one school district.
Harrison Grist Mill, also known as Morley Grist Mill, is a historic grist mill located at Morley in St. Lawrence County, New York.
 It was built about 1840 and is a rectangular random ashlar, cut sandstone building with a simple gable roof.
Saddle Rock is a village and a part of Great Neck in Nassau County, New York in the United States.
 The population was 830 at the 2010 census.
Murphy Grist Mill, also known as the Old Mill, is a historic grist mill located at Poughquag, Dutchess County, New York.
 It was built in 1889, and is a two-story, front-gabled, vernacular frame building with a stone and concrete foundation.
 It has a one-story, hipped roof porch supported by simple contemporary posts.
 Also on the property are the contributing ruins of a stone mill dam.
 During his 1909 campaign for New York State Senate, Franklin Delano Roosevelt gave a political speech from the porch of the mill building.
 The mill remained in use until about 1940.
 Franklin Delano Roosevelt Jr. purchased the property in 1949 and the mill was used primarily for storage.
 During the mid-1980s, it was given to the Town of Beekman and restoration began in 2014.
Easton Roller Mill is a historic sawmill and grist mill located near Morgantown, Monongalia County, West Virginia.
 Construction began in 1864 and was completed in 1867.
 During the first 10 or so years, the mill changed hands from the original builder, Henry Koontz of Frostburg MD, about four times before mill-modernizer Isaac Morris bought the mill in 1894.
 Originally it was a 3 1/2-story rectangular, timber frame building with a shed addition; however, the shed was removed In recent years.
 Most mills of this era were exclusively using Burr stones for milling and grinding, however in 1894, the owner, Isaac Morris, installed roller mills for the production of high-grade white flour coming into popular demand.
 At that time, the Burr stone mill was relegated to grinding cornmeal, and so began a second business of cornmeal and animal feed products also sold at the Easton mill.
 It is probable Mr. Morris also installed the current steam engine, an 1875 Lane & Bodley 40 HP single expansion engine.
 The engine once ran on coal-generated steam; however, for insurance reasons, it now runs on compressed air for demonstration purposes.
 The mill ran under Mr. Morris' ownership until 1910.
 William C. Ley (pronounced lie) bought the mill in 1910 and ran it 24 hours a day until 1930.
 We are told that Mr. Ley was of German descent, was tall, spoke with a heavy accent, and often wore a thick black mustache under his wide brimmed hat.
 He was known for running a very expertly tuned operation, and keeping his equipment in perfect working order.
 We believe Mr. Ley potentially ran the mill seasonally through the 1930s, until his death in 1941.
 Between 1939 and Ley's death in 1941, Ley's daughter Estella Ley-Pickenpaugh and her husband Fred Pickenpaugh attempted to restore the mill to full working order, only to discover local wheat and grains unavailable, as most milling had moved to large-scale mills in the Midwest.
 During this time they may have been assisted by Mr. Ley's milling partner Frank A. Walls of Easton.
 It is unclear whether Walls held ownership interest in the mill at any time; however, his name appears on the cornmeal bags only.
 The mill was willed by Estella Ley-Pickenpaugh to the Monongalia Historical Society in 1978.
 In the fall-winter of 2012–2013, restoration work began at the mill.
 The mill is expected to be operating and touring visitors by spring 2013.
Duvillard Mill is a historic grist mill located at Cape Vincent in Jefferson County, New York.
 It was built in 1856 and is a 4 ⁄ -story, limestone structure with Stick style decoration.
 Originally a grist mill, it was later a shingle and planing mill.
 It has been remodeled for use as an aquarium and museum.
Saddle Rock Grist Mill is a historic grist mill building located in Saddle Rock, a village in the town of North Hempstead in Nassau County, New York.
 It is a 2 ⁄ -story gambrel-roofed structure.
 Adjacent is a stream-fed millpond that is supplemented by tidal water impounded by the dam.
 It dates to the 18th century and is the only extant, operating tidal grist mill on Long Island.
 The building underwent restoration in the 1950s and is operated as a local history museum.

Question: How tall is the Grist mill located in a town apart of Great Neck in Nassau County, New york with a population of 830 per the 2010 census
Answer: 2 ⁄ -story gambrel-roofed structure