Skip to main content

Rosemont Raven Rock Bridge over Lockatong Creek



Located in Delaware Township, New Jersey, just outside of Stockton, is the Rosemont-Raven Rock Bridge, which spans 127 feet over Lockatong Creek. The Rosemont-Raven Rock Bridge has different names, such as Raven Rock Bridge and Lockatong Bridge, but I'm going with Rosemont-Raven Rock Bridge, as listed on the historical marker located next to the bridge itself. Built in 1878 at a cost of $2,800 of both cast iron and wrought iron, it is one of the earliest iron Pratt through truss bridges with phoenix columns in the United States.

This extremely rare and beautiful bridge ranks is a great example of early bridge design in New Jersey. It was built by the Lambertville Iron Works of Lambertville, New Jersey, which was a local company responsible for constructing bridges throughout Hunterdon County during the last quarter of the 19th century and run by William Cowin. The bottom lateral bracing on the bridge joins to a center ring, much like the Clinton, New Jersey bridge built in 1870, which was also constructed by the Lambertville Iron Works. But what makes the Rosemont-Raven Rock Bridge noteworthy in a historical sense is that it is a significant example of a bridge using rare Phoenix columns. The Phoenix columns are present on the vertical members and it is an extremely early example of a pin-connected Pratt through truss, having been built at a time when the bowstring truss was still a frequently selected form of metal bridge. The Rosemont-Raven Rock Bridge is a very beautiful bridge and includes a highly decorative builder plaque and decorative cast iron knee bracing at the portals, along with attractive lattice railings. In addition, the bridge includes decorative finials on top of each panel and connection point.

Today, Hunterdon County owns the classic bridge over Lockatong Creek and it was restored in 2014 at a cost of more than $2.1 million. As happenstance would be, I stumbled upon this bridge in January 2017 during a drive up the Delaware River area in New Jersey. So naturally, I had to stop and take a few photos.









How to Get There:


Sources and Links:
Raven Rock Bridge - HistoricBridges.org
Raven Rock Rosemont Road Bridge - Bridgehunter
Raven Rock Road Bridge - National Park Service
Bridge on Rosemont-Raven Rock Road opens with a ceremony - NJ.com
The Lockatong Bridge over Raven Rock Road, part one - Goodspeed Histories
The Lockatong Bridge over Raven Rock Road, part two - Goodspeed Histories
The Bridges of New Jersey - Stephen M. Richman (via Google Books)

Comments

Popular posts from this blog

Mineral King Road, the White Chief Mine, and the unbuilt California State Route 276

Back in July of 2016 I took Mineral King Road east from California State Route 198 to Mineral King Valley within the Sierra Nevada Mountains of Sequoia National Park.  This June I revisited Mineral King Valley and made my way up to the White Chief Mine.


Mineral King Road is a 24.8 mile rural highway maintained by the National Park Service and as Tulare County Mountain Road 375.  Mineral King Road originates at California State Route 198 in Three Rivers near the confluence of the Middle Fork Kaweah River and the East Fork Kaweah River.  Mineral King Road climbs from a starting elevation of 1,400 feet above sea level to 7,830 feet above sea level at the White Chief Mine Trailhead in Mineral King Valley.  Notably Mineral King Road is stated to have 697 curves.


Mineral King Road has an average grade of 5.1% but has several stretches between 15-20% in places.  Pjammycycling has a detailed breakdown on the grade levels over the entirety of Mineral King Road.

Pjammycycling on Mineral King R…

Hetch Hetchy Valley; Hetch Hetchy Railroad, abandoned Lake Eleanor Road, and the Wapama Fall Bridge

This June I took a trip out to Yosemite National Park upon receiving my COVID-19 Day Use Reservation.  My destination in Yosemite National Park was out in Hetch Hetchy Valley.  I sought to hike to the Wapama Fall Bridge which took me through some of the path of the former Hetch Hetchy Valley Railroad and abandoned Lake Eleanor Road.



Part 1; Hetch Hetchy Valley, the Hetch Hetchy Railroad, and reservoir roads

Hetch Hetchy is glacially carved valley similar to Yosemite Valley which is located on the Tuolumne River of Tuolumne County.  Hetch Hetchy Valley presently is impounded by the O'Shaughnessy Dam which was completed during 1923 as part of a project to deliver water and hydroelectric power to the City of San Francisco.  Before being impounded Hetch Hetchy Valley had an average depth of approximately 1,800 feet with a maximum depth of approximately 3,000 feet.  Hetch Hetchy Valley is approximately three miles long and as much as a half mile wide.  Hetch Hetchy Valley is located dow…

California's Rogue Sign State Route Shields

While recently revisiting Yosemite National Park I took a couple minutes to capture some of the California Sign State Route shields posted by the National Park Service ("NPS").  None of the NPS shields were actually posted on roadways maintained by Caltrans but were clearly intended to create route continuity with the Sign State Highways.  This phenomenon is not exclusive to Yosemite National Park and can be found on numerous roads not maintained by Caltrans throughout California.



Part 1; Route continuity over who maintains the route

In the very early era of State Highways in California the Division of Highways didn't actually field sign the Auto Trails or even US Routes.  The responsibility of Highway signage fell to the California State Automobile Association ("CSAA") and Automobile Club of Southern California ("ACSC").  The Auto Clubs simply signed Highways on roadways that best served navigational purposes.  These navigational purposes often didn&#…