1857, March 7 Dred Scott decision by the Supreme Court holds that Congress cannot bar slavery from territories, nor can slaves be citizens.

PENNSYLVANIA - Armstrong County

Allegheny River Lock and Dam No. 6 (added 2000 - - #00000400) 1258 River Rd. , Freeport Historic Significance: Architecture/Engineering, Event Architect, builder, or engineer: Corps of Engineers, Dravo Corp. Architectural Style: Late 19th And 20th Century Revivals Area of Significance: Maritime History, Engineering, Architecture, Transportation Period of Significance: 1925-1949, 1900-1924 Owner: Federal Historic Function: Transportation Historic Sub-function: Water-Related Current Function: Transportation Current Sub-function: Water-Related Allegheny River Lock and Dam No. 7 (added 2000 - - #00000401) Along PA 4023, 0.6 mi. N of Kittanning Br. , Kittanning Historic Significance: Event, Architecture/Engineering Architect, builder, or engineer: Dravo Corp. Architectural Style: Late 19th And 20th Century Revivals Area of Significance: Engineering, Architecture, Maritime History, Transportation Period of Significance: 1925-1949, 1900-1924 Owner: Federal Historic Function: Transportation Historic Sub-function: Water-Related Current Function: Transportation Current Sub-function: Water-Related Allegheny River Lock and Dam No. 9 (added 2000 - - #00000403) Terminus of PA 1004, 0.2 mi. N of T488 , Widnoon Historic Significance: Event, Architecture/Engineering Architect, builder, or engineer: York Engineering & Construction Architectural Style: Late 19th And 20th Century Revivals Area of Significance: Transportation, Maritime History, Architecture, Engineering Period of Significance: 1925-1949, 1900-1924 Owner: Federal Historic Function: Transportation Historic Sub-function: Water-Related Current Function: Transportation Current Sub-function: Water-Related Allegheny River Lock and Dam No.8 (added 2000 - - #00000402) Along PA 1033, 1.5 mi. S of Templeton , Templeton Historic Significance: Architecture/Engineering, Event Architect, builder, or engineer: U.G.I. Contracting Co. Architectural Style: Late 19th And 20th Century Revivals Area of Significance: Engineering, Architecture, Transportation, Maritime History Period of Significance: 1925-1949, 1900-1924 Owner: Federal Historic Function: Transportation Historic Sub-function: Water-Related Current Function: Transportation Current Sub-function: Water-Related Allegheny River Locka and Dam No. 5 (added 2000 - - #00000399) 830 River Rd. , Freeport Historic Significance: Architecture/Engineering, Event Architect, builder, or engineer: Corps of Engineer, Dravo Construction Company Architectural Style: Moderne Area of Significance: Transportation, Maritime History, Architecture, Engineering Period of Significance: 1925-1949, 1900-1924 Owner: Federal Historic Function: Transportation Historic Sub-function: Water-Related Current Function: Transportation Current Sub-function: Water-Related Armstrong County Courthouse and Jail (added 1981 - - #81000526) E. Market St. , Kittanning Historic Significance: Event Area of Significance: Politics/Government Period of Significance: 1850-1874 Owner: Local Historic Function: Government Historic Sub-function: Correctional Facility, Courthouse Current Function: Government Current Sub-function: Correctional Facility, Courthouse Bradys Bend Iron Company Furnaces (added 1980 - - #80003407) PA 68 , Bradys Bend Historic Significance: Information Potential, Event Area of Significance: Historic - Non-Aboriginal, Economics, Industry Cultural Affiliation: American,industrial Period of Significance: 1825-1849 Owner: Local Historic Function: Industry/Processing/Extraction Historic Sub-function: Manufacturing Facility Current Function: Vacant/Not In Use Bridge between Madison and Mahoning Townships (added 1988 - - #88000798) LR 03178 over Mahoning Creek , Deanville Historic Significance: Architecture/Engineering Architect, builder, or engineer: Unknown Architectural Style: Other Area of Significance: Engineering Period of Significance: 1875-1899 Owner: State Historic Function: Transportation Historic Sub-function: Road-Related Current Function: Transportation Current Sub-function: Road-Related Colwell Cut Viaduct (added 1988 - - #88000796) Also known as Hogback Hill Bridge LR 66 over Pittsburgh & Shawmut RR , Seminole Historic Significance: Architecture/Engineering Architect, builder, or engineer: Concrete Steel Bridge Co. Architectural Style: Other Area of Significance: Engineering Period of Significance: 1900-1924 Owner: State Historic Function: Transportation Historic Sub-function: Road-Related Current Function: Transportation Current Sub-function: Road-Related Drake Log Cabin (added 1983 - - #83002214) Williams Alley , Apollo Historic Significance: Architecture/Engineering, Event Architectural Style: Other Area of Significance: Exploration/Settlement, Architecture Period of Significance: 1825-1849, 1800-1824 Owner: Private Historic Function: Domestic Historic Sub-function: Single Dwelling Current Function: Recreation And Culture Current Sub-function: Museum Ford City Armory (added 1989 - - #89002074) 301 Tenth St. , Ford City Historic Significance: Architecture/Engineering, Event Architect, builder, or engineer: Hatten,Clyde, Kuntz,Joseph F. Architectural Style: Moderne Area of Significance: Military, Architecture Period of Significance: 1925-1949 Owner: State Historic Function: Defense Historic Sub-function: Arms Storage Current Function: Defense Current Sub-function: Arms Storage Marshall, Thomas, House (added 1976 - - #76001602) State St. , Dayton Historic Significance: Architecture/Engineering Architect, builder, or engineer: Unknown Architectural Style: Georgian Area of Significance: Architecture Period of Significance: 1875-1899, 1850-1874 Owner: Private Historic Function: Domestic Historic Sub-function: Single Dwelling Current Function: Vacant/Not In Use St. Patrick's Roman Catholic Church (added 1978 - - #78002340) W of Cowansville off PA 268, Sugarcreek Township , Cowansville Historic Significance: Event Area of Significance: Exploration/Settlement, Religion Period of Significance: 1800-1824 Owner: Private Historic Function: Religion Historic Sub-function: Religious Structure Current Function: Religion Current Sub-function: Religious Structure St. Stephen's Church (added 1980 - - #80003408) PA 68 , Bradys Bend Historic Significance: Event, Architecture/Engineering Architect, builder, or engineer: Unknown Architectural Style: Gothic Revival Area of Significance: Architecture, Religion Period of Significance: 1850-1874 Owner: Private Historic Function: Religion Historic Sub-function: Religious Structure Current Function: Social Current Sub-function: Clubhouse

The Hocking Hills Geological History on Display

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