[3] Name on the Register Image Date listed[4] Location Municipality Description 1 H.O. Andrews Feed Mill H.O. Andrews Feed Mill March 20, 1990 (#90000399 ) West Main Street 40°23′42″N 77°56′35″W / 40.395°N 77.943056°W / 40.395; -77.943056 (H.O. Andrews Feed Mill ) Mapleton 2 Baker Bridge Baker Bridge March 20, 1990 (#90000411 ) Township Route 370 over Great Trough Creek , 1 mile (1.6 km) east of Newburg 40°17′10″N 78°07′17″W / 40.286111°N 78.121389°W / 40.286111; -78.121389 (Baker Bridge ) Todd Township 3 Barree Forge and Furnace Barree Forge and Furnace March 20, 1990 (#90000405 ) 2 miles (3.2 km) north of Alexandria along the Juniata River 40°35′18″N 78°06′04″W / 40.588333°N 78.101111°W / 40.588333; -78.101111 (Barree Forge and Furnace ) Porter Township 4 Birmingham Bridge Birmingham Bridge March 20, 1990 (#90000400 ) Over the Juniata River , north of Birmingham off Pennsylvania Route 350 40°38′56″N 78°11′57″W / 40.648889°N 78.199167°W / 40.648889; -78.199167 (Birmingham Bridge ) Warriors Mark Township Extends into Tyrone Township in Blair County 5 Brumbaugh Homestead Brumbaugh Homestead March 28, 1979 (#79002236 ) Northeast of Marklesburg off Pennsylvania Route 26 40°23′35″N 78°08′30″W / 40.393056°N 78.141667°W / 40.393056; -78.141667 (Brumbaugh Homestead ) Penn Township 6 Colerain Forges Mansion Colerain Forges Mansion March 20, 1990 (#90000406 ) Pennsylvania Route 45 , 0.75 miles (1.21 km) south of Franklinville 40°38′20″N 78°06′00″W / 40.638889°N 78.1°W / 40.638889; -78.1 (Colerain Forges Mansion ) Franklin Township 7 Corbin Bridge Corbin Bridge March 20, 1990 (#90000402 ) Township Road 428 over the Raystown Branch , southwest of Huntingdon and 0.5 miles (0.80 km) west of its confluence with the Juniata River 40°27′16″N 77°59′00″W / 40.454444°N 77.983333°W / 40.454444; -77.983333 (Corbin Bridge ) Juniata Township 8 East Broad Top Railroad East Broad Top Railroad October 15, 1966 (#66000666 ) 1 mile (1.6 km) west of Orbisonia on U.S. Route 522 40°14′24″N 77°53′58″W / 40.240000°N 77.899444°W / 40.240000; -77.899444 (East Broad Top Railroad ) Numerous municipalities[5] Extends into Broad Top Township in Bedford County 9 Frehn Bridge Frehn Bridge March 20, 1990 (#90000391 ) Township Route 313, 2 miles (3.2 km) west of Pennsylvania Route 475 40°08′00″N 77°59′29″W / 40.133333°N 77.991389°W / 40.133333; -77.991389 (Frehn Bridge ) Springfield Township The bridge has been demolished and replaced with a modern structure.[6] 10 Greenwood Furnace Greenwood Furnace November 13, 1989 (#89001819 ) Pennsylvania Route 305 in Greenwood Furnace State Park , east of McAlevys Fort 40°38′48″N 77°46′41″W / 40.646667°N 77.778056°W / 40.646667; -77.778056 (Greenwood Furnace ) Jackson Township 11 Greenwood Lake Dam Greenwood Lake Dam May 11, 1987 (#87000050 ) 5 miles (8.0 km) north of Belleville off Pennsylvania Route 305 40°38′55″N 77°45′32″W / 40.648611°N 77.758889°W / 40.648611; -77.758889 (Greenwood Lake Dam ) Jackson Township 12 Harbison-Walker Refractories Company Harbison-Walker Refractories Company March 20, 1990 (#90000392 ) West Shirley Street 40°23′10″N 77°53′23″W / 40.386111°N 77.889722°W / 40.386111; -77.889722 (Harbison-Walker Refractories Company ) Mount Union 13 Hudson Grist Mill Hudson Grist Mill March 20, 1990 (#90000390 ) Pennsylvania Route 829 40°12′49″N 78°00′27″W / 40.213611°N 78.0075°W / 40.213611; -78.0075 (Hudson Grist Mill ) Saltillo 14 Huntingdon Armory Huntingdon Armory December 22, 1989 (#89002075 ) Standing Stone Avenue, east of central Huntingdon 40°29′06″N 77°59′36″W / 40.485°N 77.993333°W / 40.485; -77.993333 (Huntingdon Armory ) Huntingdon 15 Huntingdon Borough Historic District Huntingdon Borough Historic District April 24, 1986 (#86000852 ) Roughly bounded by Moore, Second, Allegheny, and Ninth Streets 40°29′10″N 78°00′41″W / 40.486111°N 78.011389°W / 40.486111; -78.011389 (Huntingdon Borough Historic District ) Huntingdon 16 Huntingdon Furnace Huntingdon Furnace March 20, 1990 (#90000407 ) Township Road 31106 northwest of Franklinville, 2 miles (3.2 km) northwest of its junction with Pennsylvania Route 45 40°39′28″N 78°06′59″W / 40.657778°N 78.116389°W / 40.657778; -78.116389 (Huntingdon Furnace ) Franklin Township 17 Juniata Iron Works Juniata Iron Works March 20, 1990 (#90000404 ) Off Pennsylvania Route 885 , 1.5 miles (2.4 km) east of Alexandria 40°32′40″N 78°05′00″W / 40.544444°N 78.083333°W / 40.544444; -78.083333 (Juniata Iron Works ) Porter Township 18 Benjamin B. Leas House Benjamin B. Leas House February 23, 1984 (#84003401 ) U.S. Route 522 40°17′56″N 77°52′18″W / 40.298889°N 77.871667°W / 40.298889; -77.871667 (Benjamin B. Leas House ) Shirleysburg 19 Lloyd and Henry Warehouse Lloyd and Henry Warehouse March 20, 1990 (#90000397 ) South 8th Street 40°29′11″N 78°01′05″W / 40.486389°N 78.018056°W / 40.486389; -78.018056 (Lloyd and Henry Warehouse ) Huntingdon 20 Marklesburg Historic District Marklesburg Historic District February 16, 1996 (#96000084 ) Junction of Pennsylvania Route 26 and Legislative Route 3010 40°22′57″N 78°10′22″W / 40.3825°N 78.172778°W / 40.3825; -78.172778 (Marklesburg Historic District ) Marklesburg 21 Minersville Coke Ovens Minersville Coke Ovens March 20, 1990 (#90000401 ) Pennsylvania Route 913 , 1 mile (1.6 km) east of Coalmont 40°13′00″N 78°11′03″W / 40.216667°N 78.184167°W / 40.216667; -78.184167 (Minersville Coke Ovens ) Carbon Township 22 Monroe Furnace Monroe Furnace November 13, 1989 (#89001818 ) Junction of Pennsylvania Route 26 and Legislative Route 31076, 6 miles (9.7 km) northwest of McAlevys Fort 40°41′43″N 77°53′41″W / 40.695278°N 77.894722°W / 40.695278; -77.894722 (Monroe Furnace ) Barree Township Only ruins are visible. Best viewed in the winter. 23 Mount Union Historic District Mount Union Historic District May 26, 1994 (#94000516 ) Roughly bounded by Water and Greene Streets, the I.O.O.F. Cemetery, and Washington and Lafayette Streets 40°23′06″N 77°53′03″W / 40.385°N 77.884167°W / 40.385; -77.884167 (Mount Union Historic District ) Mount Union 24 Christian Oyer Jr. House Upload image July 21, 1995 (#95000882 ) Township Road 513, northeast of Huntingdon 40°36′34″N 77°53′54″W / 40.609444°N 77.898333°W / 40.609444; -77.898333 (Christian Oyer Jr. House ) Barree Township 25 Paradise Furnace Paradise Furnace March 20, 1990 (#90000403 ) 5 miles (8.0 km) southeast of Entriken in Trough Creek State Park 40°18′39″N 78°07′34″W / 40.310833°N 78.126111°W / 40.310833; -78.126111 (Paradise Furnace ) Todd Township 26 Pennsylvania Canal Guard Lock and Feeder Dam, Raystown Branch Pennsylvania Canal Guard Lock and Feeder Dam, Raystown Branch March 20, 1990 (#90000394 ) 2.5 miles (4.0 km) east of Huntingdon, south of U.S. Route 22 on the Juniata River 40°26′59″N 77°58′09″W / 40.449722°N 77.969167°W / 40.449722; -77.969167 (Pennsylvania Canal Guard Lock and Feeder Dam, Raystown Branch ) Henderson Township 27 Pennsylvania Furnace Mansion Pennsylvania Furnace Mansion March 20, 1990 (#90000409 ) Off Pennsylvania Route 45 at Pennsylvania Furnace, south of the Centre County line 40°42′13″N 78°00′47″W / 40.703611°N 78.013056°W / 40.703611; -78.013056 (Pennsylvania Furnace Mansion ) Franklin Township 28 Pennsylvania Railroad Bridge over Shavers Creek Pennsylvania Railroad Bridge over Shavers Creek March 20, 1990 (#90000395 ) Over Shavers Creek near its confluence with the Juniata River 40°34′01″N 78°02′54″W / 40.566944°N 78.048333°W / 40.566944; -78.048333 (Pennsylvania Railroad Bridge over Shavers Creek ) Logan Township and Petersburg 29 Pennsylvania Railroad District Pennsylvania Railroad District March 20, 1990 (#90000393 ) Conrail mile markers 213.73 to 218.88 40°36′47″N 78°09′07″W / 40.613056°N 78.151944°W / 40.613056; -78.151944 (Pennsylvania Railroad District ) Spruce Creek Township 30 Pennsylvania Railroad Old Bridge over Standing Stone Creek Pennsylvania Railroad Old Bridge over Standing Stone Creek March 20, 1990 (#90000410 ) South of Penn Street over Standing Stone Creek 40°28′51″N 78°00′17″W / 40.480833°N 78.004722°W / 40.480833; -78.004722 (Pennsylvania Railroad Old Bridge over Standing Stone Creek ) Huntingdon 31 Pulpit Rocks Pulpit Rocks November 4, 1993 (#93001614 ) Old Huntingdon-Hollidaysburg Turnpike, northwest of Huntingdon 40°31′01″N 78°02′49″W / 40.516944°N 78.046944°W / 40.516944; -78.046944 (Pulpit Rocks ) Porter Township 32 Robb Farm Robb Farm April 20, 2011 (#11000202 ) 11023 Hartslog Valley Road 40°29′01″N 78°05′28″W / 40.483553°N 78.091133°W / 40.483553; -78.091133 (Robb Farm ) Walker Township 33 Robertsdale Historic District Robertsdale Historic District May 7, 1992 (#92000391 ) Roughly bounded by the USGS 1840 contour line and South Main, Wood, Lincoln, Cliff, and Cherry Streets, in Robertsdale 40°11′01″N 78°06′45″W / 40.183611°N 78.1125°W / 40.183611; -78.1125 (Robertsdale Historic District ) Wood Township 34 Runk Bridge Runk Bridge March 20, 1990 (#90000408 ) Over Aughwick Creek , 1 mile (1.6 km) south of Shirleysburg off U.S. Route 522 40°16′40″N 77°53′14″W / 40.277778°N 77.887222°W / 40.277778; -77.887222 (Runk Bridge ) Shirley Township 35 St. Mary's Covered Bridge St. Mary's Covered Bridge March 20, 1980 (#80003503 ) 4.5 miles (7.2 km) south of Orbisonia on U.S. Route 522 40°12′21″N 77°52′42″W / 40.205833°N 77.878333°W / 40.205833; -77.878333 (St. Mary's Covered Bridge ) Cromwell Township 36 Hugh D. and Martha South Seeds Farm Upload image March 12, 1999 (#99000328 ) Legislative Route 31061, 1 mile (1.6 km) east of Pemberton 40°37′45″N 78°09′06″W / 40.629167°N 78.151667°W / 40.629167; -78.151667 (Hugh D. and Martha South Seeds Farm ) Spruce Creek Township 37 Shade Gap Feed and Flour Mill Shade Gap Feed and Flour Mill March 20, 1990 (#90000396 ) U.S. Route 522 , 1 mile (1.6 km) north of Shade Gap 40°11′14″N 77°52′08″W / 40.187222°N 77.868889°W / 40.187222; -77.868889 (Shade Gap Feed and Flour Mill ) Dublin Township 38 Lewis Smalley Homestead Lewis Smalley Homestead November 14, 1978 (#78003088 ) East of Allenport on Pennsylvania Route 103 40°21′40″N 77°49′52″W / 40.361111°N 77.831111°W / 40.361111; -77.831111 (Lewis Smalley Homestead ) Shirley Township 39 Spruce Creek Rod and Gun Club Spruce Creek Rod and Gun Club February 28, 1991 (#91000228 ) Pennsylvania Route 45 , northeast of Franklinville (6501 Clubhouse Lane) 40°40′28″N 78°02′52″W / 40.674444°N 78.047778°W / 40.674444; -78.047778 (Spruce Creek Rod and Gun Club ) Franklin Township 40 Warrior Ridge Dam and Hydroelectric Plant Warrior Ridge Dam and Hydroelectric Plant April 26, 1990 (#90000701 ) 2 miles (3.2 km) south of Petersburg, along the former Conrail main line 40°32′22″N 78°02′03″W / 40.539444°N 78.034167°W / 40.539444; -78.034167 (Warrior Ridge Dam and Hydroelectric Plant ) Logan and Porter Townships 41 Whipple Dam State Park Day Use District Whipple Dam State Park Day Use District February 12, 1987 (#87000109 ) 10 miles (16 km) south of State College, east of Pennsylvania Route 26 40°41′05″N 77°51′53″W / 40.684722°N 77.864722°W / 40.684722; -77.864722 (Whipple Dam State Park Day Use District ) Jackson Township 42 Woodvale Historic District Woodvale Historic District July 24, 1992 (#92000942 ) Roughly bounded by Ash, High, North, Fulton, and Broad Streets in Woodvale 40°10′01″N 78°08′17″W / 40.166944°N 78.138056°W / 40.166944; -78.138056 (Woodvale Historic District ) Wood Township Extends into Broad Top Township in Bedford County and Wells Township in Fulton County