This wonderful photo captures the line undergoing electrification where the Western Maryland (WM) Railway splits right, and PRR left. The photographer is standing at Fulton Avenue, with the Baltimore and Potomac (B&P) tunnel's south/west portal not far behind him.

To make room for the catenary, the B&P Tunnel's floor was lowered by 18 inches, while outside the tunnel the grading had to be adjusted to match, hence the new concrete retaining walls at the sides here. Note the beveled edges of the concrete footing for the catenary pole; such angling is characteristic of original footings, most of which remain extant as of 2020.

Fulton Junction Tower seen near center endured until 1965 when it was demolished because new tech allowed track switches to be controlled from B&P Junction Tower. Prior to that, Baltimore terminal's four PRR towers (B&P Junction, Fulton Junction, Union Junction, and Biddle Street) housed a total of 254 track control levers.

That's Monroe Street crossing over the tracks.

Links: source photo, LoC tower info (PDF)

Monroe Street got a new bridge in 1986 around the time the connection with Western Maryland (foreground) was severed. WM's Fulton Station for freight stood on the right where Monroe Street's bridge now traverses.

The reservoir tank AMTK 2007 appears to be sniffing holds compressed air that powers track switches in the vicinity. Pneumatic systems are commonly substituted for electrical equipment at low spots like this one at Monroe Street where puddling water could cause a short.

Having recently emerged from B&P Tunnel, AMTK 649 leads southbound travellers toward Washington, DC.

Another of the ACS-64 model, AMTK 661, slows before being given the green light to enter the B&P Tunnel.

A minerals plant has occupied the inside of the Fulton Junction wye for many decade. In the past, hoppers unloaded various types of gravel, coal, etc. into these drop bins. Though long disused, old track still runs above them. B&P's Fulton Station had stood about 200 feet west of these bins.

During the brief 1870s period after the B&P began service but before its tunnel was completed in 1873, B&P trains started/ended at its Fulton Station (image upper center), with stagecoaches transporting passengers the rest of the way to central Baltimore.

Fulton Station is oriented for B&P access, but the lack of B&P tracks to it suggests this 1876 GM Hopkins map was drawn after the tunnel opened and B&P tracks to the station had been removed. The circle adjacent the station represents a turntable, which would have been needed to reverse the direction of steam engines before the tunnel opened. At map time, the turntable remained connected to WM trackage, so had likely been shared by both railroads. The turntable was located close to where the minerals plant now has a pit into which stone can be unloaded from hoppers by gravity.

The ill-fated Baltimore & Drum Point Railroad is shown connecting here, presumably to employ the B&P Tunnel. The red line marks Baltimore City's western limit at the time. At map time, some of these streets existed only as plans, and some names changed later, for example, that marked Townsend became Lafayette. The small creek depicted was long ago directed into underground pipes.

The track arrangement revealed by this aerial shows both WM and PRR trackage extends to the drop bins. Many small sidings sprout to serve industry in this area.

The dashed blue line represents the approximate path of the new tunnel if it follows proposed route 3B. That path would take it directly under where B&P's Fulton Station had stood.

Some people ask me why this is called a "wye". Note the arrangement of the trackage: it resembles the letter Y.

AMTK 2001 negotiates what is left of the wye, and the NEC's tightest curve in the Baltimore area. This curve would be lessened by the proposed alignment for a new tunnel. Mile 98 is here but its post is nowhere to be found. This is the line's highest elevation within the city.

Until about 1980 the southwest leg of the Fulton Junction wye had connected on the left; rusty rails continue to hide in the brush. If someday needed again, behind the photographer the leg could be reconnected with the new alignment, however there will not be sufficient room to restore the wye's northeast leg that had connected with Western Maryland.

As seen from the Lafayette Avenue bridge, part of the new tunnel's south (west) portal would be in the trees on the right. Inside the new tunnel its 4-track line would pass under the existing tracks at the curve ahead. It's here the existing tracks reach their highest elevation within Baltimore County/City.

Amtrak has swapped out the incandescent bulbs in these signals for LEDs. There is a downside to LEDs: they do not generate enough heat to melt snow, so are at risk of being obscured by a snowstorm. As a group these remind me of the glowing green blob in The Andromeda Strain.

The new alignment would pass in an open cut where Pulaski Avenue now does under the fortuitously extra-long Lafayette Avenue bridge; in this view that's the far side of the bridge, with Pulaski barely visible, and the NE Branch of Gwynns Run buried adjacent. This bridge had not yet been built in 1927, so in the old aerial above note traffic waiting for the train to clear the grade crossing.

Looking south, coming from the left the new alignment would briefly join the existing for passage under the Edmondson Avenue bridge (ahead). A small yard had been on the left, and Lafayette Station (also called Lafayette Avenue Station) below on the right.

The tracks divide and multiply from two to four. The line is quad-tracked for the next 5 miles, from here to Halethorpe Station.

For PRR trains westbound from Washington, stopping in Baltimore has always been a problem due to the inability to turn around at Penn Station. Where Edmondson Avenue crosses the line, this building, now home to food/grocery/supplies stores, was built by PRR about 1920 as a substitute for Penn Station. The idea was westbounds would stop here then bypass Penn Station by turning northwestward at North Avenue (the John Street Tunnel segment) via the incomplete tunnel there.

In part due to this station's location far from downtown, the idea was never fully implemented, however trains continued to stop here into the Amtrak era, per the 1979 schedule linked below. The structure along the left side of the building (at the "Pizza" sign) was part of a baggage elevator to the tracks below. Thanks go to Frank Wrabel for relaying this interesting PRR history.

Link: Amtrak Schedule 1979

From the area right of the distant MARC train, after squeezing under Edmondson Avenue the new alignment would shift west (left) of the existing, and require a new bridge over Franklin Street, the road being negotiated by the auto at bottom right.

Into the 1930s, a siding split off to the right to serve the Amercan Ice Company. No evidence of the siding remains today.

Link: American Ice Company pics (and others)

A few original Pennsylvania Railroad keystone logos still lurk, such as this one embossed in concrete at Mulberry Street (US 40) next to the West Baltimore MARC station (left).

Westbound MARC 35 is pushing away from the West Baltimore MARC station that would be rebuilt adjacent on the west side of the existing station. The new alignment would traverse a new bridge over Mulberry Street before rejoining the old/existing alignment from the right near the MARC train. The Gwynns Falls Viaduct in the distance would likely be rehabbed, and the Pennsy's disused Gwynn Tower (center, distant) torn down.

Link: former stations in this area (archive)

Immediately after it finishes crossing over Warwick Avenue, southbound AMTK 2035 will also pass Gwynns Run, a stream that has been enclosed within underground pipes since the time of the nearby Wilkens Curled Hair Factory, i.e. so long as to be all but forgotten. Calverton Stock Yards were also here, with paved ground -- uncommon during the 1800s -- to minimize the mud. Next on the route and equally forgotten is the B&P's/PB&W's/PRR's small Calverton Station (sometimes called Gwynns Run Station).

There's room here for at least six tracks because it had been the location of Gwynn Yard, sometimes written Gwynn's Yard, Gwynns Run Yard, Gwinn Yard, and other permutations.

Links: historical marker, industry ~1900, study to daylight Gwynns Run (misleading title)

Gwynn Yard, shown here near its peak, received freight service from the 1890s into the 1980s. The B&P's small passenger station was located at the Calverton Road grade crossing on the southeast side of the tracks. The blue line represents approximately where Gwynns Run flows underground.

As you may guess by its running athwart the street grid, Calverton is one of the oldest roads here. The Baltimore, Calverton and Powhatan Railway horse-drawn streetcar line crossed at grade where Calverton Road did. Powhatan is near Woodlawn Cemetery. By 1953, the grade crossing was closed, having been superceded by underpasses for Warwick Avenue and Franklintown Road. The latter is where bridge 98 (right) is found.

This likely held equipment related to track switches to the various industrial sidings at Gwynn. Here graffitiers have been only partially successful at preventing phlogiston from escaping into the atmosphere.

Link: before rust there was phlogiston

Deep zoom shows AMTK 665 crossing the Gwynns Falls Viaduct. Disused Gwynn Tower is at right. It was preceded by VN tower that had been located at the Cemetery Lane (now Kinsey Avenue) grade crossing, not far from where the photographer is standing.

Link: 2013

Views of the viaduct come easily since Baltimore Street curves under it. Before Baltimore Street's valley-spanning bridge opened during 1932, Ellicott Driveway coursed under the railroad here. The Ellicott family operated several mills near here.

The aerial view circa 1930 (courtesy Gwynns Falls Trail and Enoch Pratt Free Library) shows the railroad bridge in the foreground, with part of Gwynn Yard at right, and Gwynn Tower at left. VN Tower stands at the near side of the tracks at photo right.

Link: Gwynns Falls Trail site

The railroad's grand Gwynns Falls Viaduct stretches 580 feet across the valley, 85 feet above the stream. The PB&W crafted this open-spandrel arch to replace the B&P's double-tracked iron bridge at the same location. At left is bridge construction as Western Maryland (WM) trains witnessed it from below during 1913. Milepost 2 is part of the ex-WM, now CSX Hanover Subdivision.

Link: 1872 drawing
Change for: Western Maryland Railway at this spot

As you might guess from the arch indentation, the new bridge was constructed in halves while the WM operated below. First the north half was added adjacent to the 19th century iron bridge, then trains were switched onto it. Next the old bridge was torn down and a new south half built with two more tracks, seen at left under construction.

After more than a century the concrete is spalling and the bridge will need repair if not total replacement during the 21st century.

Link: Railway Review article

The Droste Effect creates a cathedral-like appearance where the two double-tracked halves meet.

The Gwynns Falls Trail signmakers, confused by the similar arches of the later rail and road bridges, mislabeled this photo. The photo is not of construction of Baltimore Street's bridge, but rather of the 1913 replacement railroad bridge for the B&P's Gwynns Falls Valley bridge, seen with blurred train along its top.

The concrete details in this photo match those of the still-extant railroad bridge, not the Baltimore Street bridge that would later be built adjacent.

Link: Gwynns Falls Trail site,

The similar appearance of the arches is evident in this main photo: the grayer masonry carries Baltimore Street, the yellower behind it carries Amtrak. Amtrak now maintains its bridge, or defers maintenance, as the case may be.

Look! That catenary pole near AMTK 2011 is bent and probably about to tumble!

Uh, no. Per the HAER photo clip on the right it was bent and leaning when ex-Pennsy Amtrak GG1 910 powered by during the 1970s, and probably was years before then too.

Link: LoC source photo

B&P's original 1870s iron bridge across Gwynns Falls could be seen from an adjacent quarry. The river is on the left.

Link: source photo

Looking from roughly the same location about 120 years later finds many differences. The masonry that replaced B&P's iron bridge is now over a century old.