1939,1988,2011 US-40 and 1962,1988 I-95 Bridges over Susquehanna River near Havre de Grace, MD

US-40: (Archived Bridge Hunter; Bridge Hunter; Historic Bridges; Satellite) Thomas J. Hatem Memorial Bridge

I-95: (Archived Bridge Hunter; Bridge Hunter; Historic Bridges; Satellite) Millard E. Tydings Memorial Bridge

US-40 Thomas J. Hatem Memorial Bridge

BridgeHunter calls this an arch bridge, but I agree with HistoricBridges that it is a continuous-truss bridge.

Donald Cooper, Apr 2024

Street View, May 2024

2005 photo by Jann Mayer via BridgeHutner_US-40

Postcard via BridgeHutner_US-40 via Boston Public Library

Postcard via BridgeHutner_US-40 via Boston Public Library

HistoricBridges_US-40

I-95 Millard E. Tydings Memorial Bridge

HistoricBridges_I-95

Wikimedia Commons user Famartin via BridgeHunter_I-95

Remember When: Maryland and VA WVA posted
In 1962, two of the ten twin towered bridge piers for the $74,000,000 Northeast Expressway are shown as the rise in the Susquehanna River near Havre de Grace!

Fred Willard: Renamed JFK highway in 1963. Becoming I95 after that

Both

Going upstream from the mouth:

• Pennsy Railroad
• US-40
• B&O Railroad
• I-95

Chiranjib Misra, Jul 2019

1894+1966,2000 Glenwood Bridges over Monongahela River in Pittsburgh, PA

1894: (Archived Bridge Hunter; Bridge Hunter) 

1966: (Archived Bridge Hunter; Bridge Hunter; Historic Bridges; pghbridges; Satellite)

1894 Bridge

 

1964 Photo from Pittsburgh Bridges via ArchivedBridgeHunter_1894, License: Creative Commons Attribution-Share-Alike (CC BY-SA)

Jackson-Township historical preservation posted

Old Glenwood Bridge over the Monongahela River near the Hazelwood neighborhood of Pittsburgh.

(Photo from Blaine Stanziana via https://www.facebook.com/groups/132768683480072/)

Patrick Boyle: This was the last deck before demolition. The streetcar tracks are gone.

Andrew Simko: We were driving over it in my friend’s old car when one of the boards came up through the rear floor.

Ed Falvo commented on the above post

Pennsylvania Trolley Museum posted
To a day of transit service in Pittsburgh, back in September 1963. This particular photograph shows a PCC car on the wooden decked Glenwood bridge, crossing the Monongahela River and moving inbound on the 56 line. (Photo from Ray Berger's Collection)

1966 Bridge

HistoricBridges
"This bridge is unusual because most of the trusses are below deck except at the piers where they rise up forming a through truss design."
This 2276' (394m) long bridge has a main span of 567' (173m).

pghbridges
"Its form is unusual hybrid: primarily a deck-type truss, but the panels are enlarged as they meet the piers. The top chord curves above the deck, but the side trusses are connected only at the vertical support above the piers. This upper cross-brace appears to be mostly cosmetic as the bracing below the deck is much more substantial."

That is the B&O Glenwood Bridge #73 in the right background of this view.

Street View, Nov 2024

1956 I-95/PA+NJ Turnpike Bridge over Delaware River near Florence, NJ

(Archived Bridge Hunter; Bridge Hunter; no Historic Bridges; Satellite)

This arch-truss bridge has a length of 6571' (2km, 1 1/4 mile) and a main span of 682' (208m). [BridgeHunter]

Street View, May 2022

Photo from Wikimedia Commons via BridgeHunter

Metrotrails posted
PA Turnpike bridge seen from the Florence NJ side, Delaware River
Metrotrails shared

Michael E Pearson added
The Delaware River-Turnpike Toll Bridge carries Interstate 95 across the Delaware River via a 1956 built, 682 foot [208m] steel arch span; with a total length of 6751 feet [2km], connecting the Pennsylvania and New Jersey Turnpikes between Bucks and Burlington Counties in PA & NJ respectively. This was not a low pass drone shot, but rather, it was handheld from onboard a boat.

I think it is more accurate to call it a continuous truss instead of an arch truss. I wondered why Historic Bridges didn't document this bridge because Nathan is better at identifying a continuous truss. So, I took a closer look at a gusset plate. It uses bolts instead of rivets. Bolts are Nathan's criteria for a modern bridge instead of a historic bridge. This bridge must be bleeding edge in terms of using bolts. You can see it is a transition of technology because it uses rivets instead of welds to build the beams. (Update: Jon H comments below that the bolts were probably used during an upgrade. It was probably built with rivets. Jon also mentioned that I-95 was rerouted to this bridge in the mid 2000's.)

Street View, Sep 2023

I knew the Pennsy Turnpike was I-76 in the Pittsburgh area. I didn't know where the turnpike crossed the Delaware River so I followed I-76 east across the state. When I found myself down in Philadelphia on the Walt Whitman Bridge, I knew that the turnpike must divert to some other Interstate in the east. So I found this map and determined that it goes from I-76 to I-276 and then to I-95 just before the river. 

paturnpike

Just two lanes in each direction carries the east/west traffic of the turnpike and the north/south traffic of I-95. I confirmed that they squeeze three lanes down to two before the bridge. I wonder how much congestion that choke point causes.

Satellite

1949,1986 Tarentum Bridge over Alegheny River at Tarentum, PA

(Archived Bridge Hunter; Bridge Hunter; Historic Bridges; pghbridges; Satellite) George Stuart Memorial Bridge

This 1,784' (544m) long bridge has a main span of 446' (136m). [HistoricBridges]

Street View, Sep 2021

Jackson-Township historical preservation posted

Richard & Robert Gunst in Tarentum Park with the Tarentum Bridge under construction in the background in Tarentum, Allegheny County in May of 1951. This photo is from the Alle-Kiski Valley Historical Society.

(Photo from Raymond Rieser via https://www.facebook.com/groups/232382343450800/)

Old Postcard via BridgeHunter

It is hard to see in the photos, but the bridge is on a significant slant with a bluff on one end and a flood plain on the other. 

pghbridges
"Elevation drawing looking downstream"

1951,1985 Regis Malady Bridge over Monongahela River at Elizabeth, PA

(Archived Bridge Hunter has a broken link; Bridge Hunter; Historic Bridges; Satellite)

This 1502' (458m) long bridge has a main span of 140' (137m). [HistoricBridges]

BridgeHunter provides a length of 1990.3' (607m).

BridgeHunter called the design: "Cantilevered tied arch." But I agree with HistoricBridges that it is a continuous truss.

USACE, Pittsburgh District posted via Dennis DeBruler

BridgeHunter, 1950 Photo from the collection of Robert A Gardner

"This particular bridge has good historic integrity and retains ornamental details like the piers at the ends of the main spans, the railing on the sidewalk, and the stairways." [HistoricBridges]

Street View, aug 2023

1939 O'Neal Bridge over Tennessee River at Florence, AL

(Archived Bridge Hunter; Bridge Hunter; Historic Bridges; Satellite)

Bridge Hunter calls it a cantilever bridge, but Historic Bridges states "this is an early surviving example of a design of continuous truss bridge unique to Alabama."

Street View, Feb 2025

This 2,071' (631m) long bridge has a main span of 420' (128m). [HistoricBridges]

The railroad bridge behind this road bridge is now a fishing pier.

Street View, Oct 2022

Scot McKinney, May 2017

Anthony Poston posted
O’Neil Bridge today from McFarland Park

HistoricBridges

1904 W&LE Whiskey Run Viaduct and Rook Yard at Green Tree, PA

Viaduct: (Archived Bridge Hunter; Historic Bridges; Satellite)

Yard: (Satellite)

Street View, Oct 2024

Dave Kuntz posted four photos with the comment: "Rook Yard and Trestle near Greentree PA, with the Wheeling & Lake Erie Railroad.  It's a fun 10 minute downhill bike ride from my house and a painful 20 minutes uphill back!"

1

2

3

4

Phil Martin Photography posted
This is known as the Whiskey Run Viaduct. It's a long elevated rail bridge that crosses over I-376 in Scott Township Pennsylvania. It was built in 1904. Norfolk Southern and Wheeling and Lake Erie Railroad use the bridge. The bridge is almost a quarter mile long.

Nick Paranzino: Norfolk southern doesn't use this bridge, its WLE only.

1894-1966+1966,2000 Glenwood Bridges over Monongahela River

1894 Bridge: (Archived Bridge Hunter)

1966 Bridge: (Archived Bridge Hunter; Historic Bridges; PGHbridges; Satellite)

 

Photo via BridgeHunter_1894, License: Creative Commons Attribution-Share-Alike (CC BY-SA)
Also, NewsInteractive, which has photos of the bridges along the Monongahela River.

This was a pin-connected bridge.

Jackson-Township historical preservation posted

Old Glenwood Bridge over the Monongahela River near the Hazelwood neighborhood of Pittsburgh.

(Photo from Blaine Stanziana via https://www.facebook.com/groups/132768683480072/)

The first photo must be of the north end because the bridge is curved and the separate truss in the foreground is going over railroad tracks. The second bridge must be of the south end.

Apr 17, 1948 @ 35,400; AR1DQ0000040080

.

1966 Bridge

 

HistoricBridges
This continuous truss bridge is 2,276' (694m) long with a 567' (173m) main span.

It has a vertical clearance of 50' (15m). [PGHbridges]

NewsInteractive, Credit: Post-Gazette
"The current Glenwood Bridge, which opened in 1966, is Pennsylvania's first all-welded, steel truss bridge."

 

"This bridge is unusual because most of the trusses are below deck except at the piers where they rise up forming a through truss design." [HistoricBridges]

Street View, Oct 2024

This photo has been moved to here.

This photo has been moved to here.