The Hillsgrove Covered Bridge is a Burr arch truss covered bridge over Loyalsock Creek in Hillsgrove Township, Sullivan County, in the U.S. state of Pennsylvania. It was built around 1850 and is long. In 1973, it became the first covered bridge in the county to be placed on the National Register of Historic Places (NRHP). The bridge is named for the township and nearby unincorporated village of Hillsgrove, and is also known as Rinkers Covered Bridge for an adjoining farm. () Also note: This incorrectly identifies the bridge as being in Elkland Township.
Pennsylvania had the first covered bridge in the United States, and has had the most such bridges since the 19th century. They were a transition between stone and metal bridges, with the roof and sides protecting the wooden structure from the weather. The Hillsgrove bridge has load-bearing Burr arches sandwiching multiple vertical king posts on each side, for strength and rigidity. It was built by Sadler Rodgers, who also constructed the nearby Forksville Covered Bridge in the same year, with a similar design.
The Hillsgrove bridge is the longest of three covered bridges remaining in Sullivan County, and served as a landing site for lumber rafts on the creek between 1870 and 1890. Nineteenth-century regulations restricting speed, number of animals, and fire are still posted on the bridge. Restoration work was carried out in 1963, 1968, 2010, and again in 2012 after serious flood damage. The bridge is still in use, with average daily traffic of 54 vehicles in 2012. Despite these restorations, it had a "structurally deficient" rating in the 2012 National Bridge Inventory, with a 16.5 percent structural sufficiency rating.
Overview The covered bridge is in Hillsgrove Township on Covered Bridge Road (Township Road 357), which is north of Pennsylvania Route 87 via Splash Dam Road (TR 359). The bridge crosses Loyalsock Creek northeast and upstream of the unincorporated village of Hillsgrove, and is just south of Elkland Township. Its official name on the NRHP is Hillsgrove Covered Bridge. It is also known as Rinkers Covered Bridge for the Rinker farm, which is located at the east end of the bridge. Sullivan County is located in north central Pennsylvania, about northwest of Philadelphia and east-northeast of Pittsburgh.
The village of Hillsgrove is where Daniel Ogden became the first settler in what is now Sullivan County, c. 1786. John Hill, who founded and named the village of Hill's Grove (later just Hillsgrove), came to the area in 1789 and bought Ogden's land about 1794. Sullivan County was formed from part of Lycoming County on March 14, 1847, and the bridge was built in 1850. The division of Lycoming County ran through Plunketts Creek Township, so there were initially townships of this name in each of the adjoining counties. To avoid confusion, the name of the Sullivan County township was changed to Hillsgrove Township in 1856; the new township name was taken from the village of Hillsgrove, which was (and is) its largest settlement. Hillsgrove Covered Bridge is named for its township and the nearby village, and gave its name to a nearby one-room school known as the Bridge View School. Note: This source also claims the surviving Hillsgrove Covered Bridge was built by Sadler Rogers in 1881.
The name Hillsgrove Covered Bridge can also refer to a now vanished covered bridge, also over Loyalsock Creek, but in the village of Hillsgrove. This stood from 1876 until 1934, when it was condemned and replaced by a steel and concrete structure. It was the third covered bridge on the site: the first fell into the creek, and the second was torn down to make way for the third bridge.
History
Background The first covered bridge in the United States was built in 1800 over the Schuylkill River in Philadelphia, Pennsylvania. According to Susan M. Zacher, author of The Covered Bridges of Pennsylvania: A Guide, the first covered bridges of the Burr arch truss design were also built in the state. Pennsylvania is estimated to have once had at least 1,500 covered bridges and is believed to have had the most in the country between 1830 and 1875. In 2001, Pennsylvania had more surviving historic covered bridges than any other state; 221 remained in 40 of its 67 counties.
Covered bridges were a transition between stone and metal bridges, the latter made of cast-iron or steel. In 19th-century Pennsylvania, lumber was an abundant resource for bridge construction, but did not last long when exposed to the elements. The roof and enclosed sides of covered bridges protected the structural elements, allowing some of these bridges to survive for well over a century. A Burr arch truss consists of a load-bearing arch sandwiching multiple king posts, resulting in a stronger and more rigid structure than one made of either element alone. Although there were 30 covered bridges in Sullivan County in 1890, only five were left by 1954, and as of 2015 only three remain: Forksville, Hillsgrove, and Sonestown.
Construction and description All three Sullivan County covered bridges were built c. 1850 with Burr arch trusses. The Hillsgrove bridge was built for Sullivan County by Sadler Rogers (or Rodgers), a native of Forksville who was only 18 years old at the time. He built the Forksville bridge the same year. The Forksville and Hillsgrove bridges both cross Loyalsock Creek, with the latter about 5 miles (8 km) further downstream. Although most sources do not list the builder of the Sonestown bridge, two newspaper articles on the remaining Sullivan County covered bridges reported that Rodgers had designed or possibly built it as well.
On July 2, 1973, the Hillsgrove bridge was the first covered bridge in Sullivan County to be added to the NRHP, and on July 24, 1980 it was again included on the NRHP in a Multiple Property Submission of seven Covered Bridges of Bradford, Sullivan and Lycoming Counties. The Hillsgrove bridge is on the 2013 National Bridge Inventory (NBI), which lists the covered bridge as long, with a maximum load of . However, the maximum load posted on the approaches to bridge itself is only . The 2006 NBI listed the bridge's roadway as wide, while according to the NRHP, the bridge's "road surface width" is , which is only sufficient for a single lane of traffic.
As of 2015, each portal has a sign with the posted clearance height of . A sign posted on the east portal above the clearance preserves the following 19th-century limits on its use: "Notice: All persons are forbidden to ride drive or lead any animal over this bridge faster than a walk or to drive more than 15 head of cattle horses or mules thereon at one time or to carry fire thereon except in a safe vessel under a penalty of not less than $.30 for each offence." Prior to the 2010 restoration, the west portal had a "No Trucks Allowed" sign hanging below the clearance sign.Note: Follow these links for photographs of the east portal and west portal.
The covered bridge rests on abutments of stone and mortar, which have been reinforced with concrete. There are no parapets. The bridge beams are reinforced in places with steel beams.Note: Follow these links for photographs of steel reinforcements on kingposts and the Burr arch and steel I-beams on the underside of the bridge. The bridge deck is made of crosswise "narrow width laid flooring". Wheel guards on the deck separate the roadway from the pedestrian walkways on either side and protect the sides, which are covered with "vertical board and batten siding" almost to the eaves. The interior and exterior are painted red. The bridge has long, narrow windows with wooden shutters: the south side has three windows, and the north side has two. An opening between the eaves and the siding runs the length of the bridge on both sides. The gable roof is wooden shake shingles. The bridge is supported by a Burr arch truss, and is similar in design and construction to the one in Forksville. The western end of the Hillsgrove bridge lies against a steep hillside, and those approaching the bridge from the west must make a sharp right turn to enter it. Prior to the 2010 restoration, the sides were unpainted, but the portals were painted red, while the gable roof was sheet metal which had been installed over the original wooden shake shingles.
Attitudes towards covered bridges in Sullivan County changed considerably in the last half of the 20th century. Two of the five bridges that remained in 1954 were razed by 1970, when the Pennsylvania Department of Transportation considered tearing down the Forksville bridge (but renovated it because of its historic nature and appeal to tourists). The Hillsgrove Covered Bridge was added to the NRHP in 1973 and the two other bridges were added in 1980. The Pennsylvania Historical and Museum Commission now forbids the destruction of any covered bridge on the NRHP in the state and has to approve any renovation work.
Use and restoration
In the 19th century the Hillsgrove Covered Bridge survived major floods on March 1, 1865, and June 1, 1889, that destroyed other bridges in the West Branch Susquehanna River valley. Note: ISBN refers to the Heritage Books July 1996 reprint. URL is to a scan of the 1892 version with some OCR typos. Between about 1870 and 1890, logging in the Loyalsock Creek watershed produced lumber rafts that floated beneath the bridge. The bridge was the site of "Uncle Ben's Landing" for lumber rafts, which did not travel at night. These rafts, each containing 5,000–30,000 board feet (11.8–70.8 m³) of lumber, were carried down the Loyalsock to its mouth at Montoursville. The raft era ended when the eastern hemlock were all clearcut.
An April, 1963 article on covered bridges in Sullivan and Lycoming counties noted that the Hillsgrove Bridge's deck was "a bit swaybacked", and according to the NBI data, the bridge was "reconstructed" in 1963. T. Corbin Lewis, a retired electrical contractor from Hillsgrove Township, restored the bridge in 1968. The concrete reinforcement on the southwest abutment of the Hillsgrove bridge is dated 1968,Note: Follow this link for a photograph of the concrete with "1968" in it. but the other work done in this restoration is not documented. Lewis also restored the Forksville Covered Bridge in 1970, with what its NRHP nomination form describes as "all kinds of odd repairs". Note: This includes and Lewis' restoration work at Forksville involved cutting windows into the sides of the bridge for the first time, with four windows on the south side and three on the north. While the Hillsgrove bridge does have more windows on the south side (three) than the north (two), it is not known when they were added. A 1936 photograph of the bridge shows no windows on the south side, and no concrete reinforcement of the eastern abutment. Note: The description of the photo includes the information on the sign above the portal on limits on speed, number of animals, and fire on the bridge.
Covered Bridge Road north of Loyalsock Creek is accessed only by the Hillsgrove Covered Bridge at the eastern end, and a bridge over Elk Creek at the western end. Sullivan County replaced the bridge over Elk Creek between March 21 and July 21, 1989. Without the Elk Creek bridge, access for five families, a business, and a Little League Baseball camp with 110 children was limited to the covered bridge. County officials noted that despite the covered bridge's posted weight limit of , it could still support , sufficient for small fire trucks and ambulances. In an emergency, larger emergency vehicles could ford the creek if needed. In any case, the limited access did not cause any problems for the four-month period while the Elk Creek bridge was replaced.