Question: When was the historic place in Crystal Valley added as a Michigan State Historical Site ?

text: National Register of Historic Places listings in Michigan
Oceana County

This is a list of properties on the National Register of Historic Places in the U.S. state of Michigan.
Name on the Register Date listed Location City or town Description
1 Dumaw Creek Site November 15 , 1972 ( # 72001477 ) Dumaw Crk , NE of Pentwater , Michigan 43°48′30″N 86°22′30″W / 43.808333°N 86.375°W / 43.808333 ; -86.375 ( Dumaw Creek Site ) Pentwater The Dumaw Creek site was once a 17th-century village and cemetery . Archeological artifacts and human remains were discovered on this site in 1915
2 Jared H. Gay House January 26 , 1989 ( # 88003235 ) Rt . 2 , 128th Ave. 43°46′33″N 86°14′16″W / 43.775833°N 86.237778°W / 43.775833 ; -86.237778 ( Jared H. Gay House ) Crystal Valley The Jared H. Gay House is a log house built in 1861 by Jared Gay and his wife Catherine . The Gays were the first permanent European settlers in the area , and were instrumental in the development of Crystal Valley . They lived in this house until 1902
3 Green Quarry Site November 9 , 1972 ( # 72001478 ) Address Restricted Mears The Green Quarry Site , covering 40 acres ( 16 ha ) , is the only known source of Lambrix chert , which was used for a variety of prehistoric tools
4 Hart Downtown Historic District November 24 , 2015 ( # 15000814 ) Along S. State St. , roughly bounded by Main , Dryden , Water , and Lincoln Sts . 43°42′07″N 86°21′51″W / 43.701880°N 86.364233°W / 43.701880 ; -86.364233 ( Hart Downtown Historic District ) Hart The Hart Downtown Historic District encompasses the central business district of the city . Structures in the district are primarily commercial , but include single family homes and government building as well . The buildings are predominantly one or two stories , and use a variety of construction materials , of which brick and block are most common . Architectural styles include Italianate , Art Moderne and Mid-Century Modern
5 Little Sable Point Light Station July 19 , 1984 ( # 84001827 ) Little Sable Point 43°39′04″N 86°32′21″W / 43.651111°N 86.539167°W / 43.651111 ; -86.539167 ( Little Sable Point Light Station ) Golden Township The Little Sable Point Light was constructed in 1874 from a design by Col. Orlando M. Poe . The light sits atop a brick tower with a stone base . Prior to 1900 , the brick was left in its natural color and state , as it was unusually hard and held up well to the elements . In 1900 the light was painted white for the first time , to assuage the complaints of mariners who said the brick was difficult to see . It remained that color until 1975 , when it was sand blasted , and returned to its natural color . The lantern is capped by a copper roof
6 Charles Mears Silver Lake Boardinghouse July 31 , 1986 ( # 86002115 ) Corner of Lighthouse and Silver Lake Channel Rds . 43°39′20″N 86°32′15″W / 43.655556°N 86.5375°W / 43.655556 ; -86.5375 ( Charles Mears Silver Lake Boardinghouse ) Mears Charles Mears was a Chicago lumberman who controlled timberland and owned mills across Michigan . Mears built a number of boardinghouses for his workers ; this boardinghouse was constructed in 1866
7 Navigation Structures at Pentwater Harbor January 11 , 2001 ( # 00001638 ) Western end of Lowell St. 43°46′51″N 86°26′25″W / 43.780833°N 86.440278°W / 43.780833 ; -86.440278 ( Navigation Structures at Pentwater Harbor ) Pentwater The Navigation Structures at Pentwater Harbor include a pair of concrete piers flanking the channel from Lake Michigan to Pentwater Lake , and the pierhead lights at the end of each pier . The channel itself dates to 1855 , when Charles Mears first dredged it for his lumber business
8 US 31-Pentwater River Bridge December 20 , 1999 ( # 99001534 ) US 31 over the Pentwater River 43°44′29″N 86°23′22″W / 43.741389°N 86.389444°W / 43.741389 ; -86.389444 ( US 31-Pentwater River Bridge ) Weare Township The US 31-Pentwater River Bridge is a three-span steel bridge with a total length of 270 feet ( 82 m ) . The two anchor spans are 84 feet ( 26 m ) long and cantilever over the piers to support the 102-foot ( 31 m ) center span , 60 feet ( 18 m ) of which is suspended