Texas Railroad History - Tower 84 - Houston (Walker Ave.)

A Crossing of the San Antonio & Aransas Pass Railway, the Houston Belt & Terminal Railroad, and the International & Great Northern Railroad

 

Left: Facing west, railroad executive John W. Barriger III took this photo from the rear platform of his private railcar on April 14, 1934. Barriger was departing for the Rio Grande Valley on Houston Belt & Terminal (HB&T) tracks leased from the Gulf, Colorado & Santa Fe (GC&SF) Railway. He has just passed Tower 84 as his railcar crossed over the San Antonio & Aransas Pass (SA&AP) Railway. Interlocking towers frequently provided the impetus for Barriger to snap photos.

In the margin of his film slide, Barriger wrote
"Leaving Houston southbound via N.O.T.&M. over GC&SF trackage (to Algoa)." Barriger's train will soon transition past the HB&T lease point and curve south, passing South Yard, New South Yard, and Tower 81. His train will join the GC&SF main line at Alvin and proceed five miles southeast to Algoa. There it will turn south on St. Louis, Brownsville & Mexico (SLB&M) tracks to the Valley.

The SLB&M was part of the Gulf Coast Lines (GCL) group owned by the St. Louis & San Francisco ("Frisco") Railway. During the Frisco's receivership c.1914, the GCL lines were separated and reorganized under the New Orleans, Texas & Mexico (NOT&M) Railway. Missouri Pacific (MP) acquired the NOT&M in 1925. Santa Fe and the SLB&M were both 25% owners of HB&T. (photo, John W. Barriger III National Railroad Library)

Right: This undated image shows Texas & New Orleans (T&NO) locomotive No. 70 northbound on the SA&AP at Tower 84 crossing the HB&T double-track. The view is the same as in Barriger's photo, but perhaps two or three decades later. The track switches and crossover remain as they were in Barriger's day. The lettering on the side of the locomotive says "Southern Pacific".

The T&NO and SA&AP were owned by Southern Pacific (SP.) In 1934, SP merged the SA&AP into the T&NO, which became SP's primary operating railroad for Texas and Louisiana lines. In Houston, the SA&AP east of downtown morphed into industrial tracks leading to Englewood Yard. A switch engine pulling an empty box car would have been a common sight. (Joe R Thompson photo, courtesy Railroad & Heritage Museum, Temple, Texas, taken from
Southern Pacific's Eastern Lines 1946 - 1996 by David Bernstein, (c)2015, North Texas Chapter, National Railway Historical Society.)

Construction of Tower 84 was authorized in 1909 by the Railroad Commission of Texas (RCT) to control a confluence of several rail lines southeast of downtown Houston. The earliest of these was the Columbia Tap, the nickname for a rail line built by the Houston Tap Railroad in 1856. The Houston Tap's goal was to "tap" the Buffalo Bayou, Brazos and Colorado (BBB&C) Railway, the first railroad in Texas. The BBB&C had completed a line to Stafford in 1853 from the Buffalo Bayou riverport of Harrisburg a few miles southeast of Houston. The BBB&C line was about six miles south of Houston's town center, and the Tap's connection to it created the first rail intersection in Texas at Pierce Junction. In June, 1858, the Houston Tap & Brazoria Railway (HT&B) acquired the Houston Tap and began building south from Pierce Junction toward Columbia, a riverport on the Brazos River 45 miles farther south. The tracks reached the east bank of the Brazos in 1860, and soon, the Columbia Tap nickname for the HB&T line was adopted (and it persists today for what's left of the original track, only about fifteen miles.)

The Civil War caused the physical deterioration and financial ruin of Texas railroads. Among many other difficulties, the war prevented the HT&B from bridging the Brazos River into the main population center of  Columbia. The terminus became known as East Columbia and a bridge was never built. After the War, the Columbia Tap was sold for $500 at a sheriff's sale due to its substantial indebtedness to the State of Texas for construction loans. In 1873, the Columbia Tap was acquired by the Houston & Great Northern Railroad which merged with the International Railroad later that year to form the International and Great Northern (I&GN) Railroad.

Under I&GN ownership, the Columbia Tap was rehabilitated and service resumed between Houston and East Columbia. The I&GN was at one point the largest railroad in Texas making it a target of rail baron Jay Gould who viewed it as a threat to his plan to dominate freight movements between the Midwest and Houston / Galveston. Gould was able to acquire the I&GN in 1881, and he was able to hang onto it during a period of financial distress in the late 1880s. After Gould's death in 1892, his son George became I&GN President. When the I&GN went back into receivership c.1917, the Gould family involvement ended. The I&GN emerged from bankruptcy in 1922 as the International - Great Northern (I-GN) and it was acquired by the NOT&M in 1924. Thus it became part of MP through MP's purchase of the NOT&M in 1925. MP had also been a Gould railroad and it had finally obtained independence from the Gould family after a lengthy bankruptcy.

The Galveston, Houston & Henderson (GH&H) Railroad was another railroad that had completed a line into Houston before the Civil War. It built the first trestle across Galveston Bay to establish service between Galveston and Houston just prior to the start of the Civil War. GH&H operations eventually resumed after the War, but Galveston politicians sought additional railroad service leading to the chartering of the Gulf, Colorado & Santa Fe (GC&SF) Railway. Completing its own bridge between the island and the mainland at Virginia Point, the GC&SF then routed their rail line well south of Houston as they built northwest toward Richmond. Ostensibly headed for Colorado, more likely the route was chosen to avoid being subject to the whims of Houston's civic leaders who had periodically shut down the GH&H under the guise of yellow fever quarantines. Such quarantines diverted Galveston-bound freight onto barges and steamships on Buffalo Bayou to be delivered directly to ships in Galveston Harbor, bypassing discriminatory fees charged by the Galveston Wharf Co. against Houston shippers. The GC&SF eventually decided they could not ignore the growing Houston market, so they built a 26-mile branch from their main line at Alvin into downtown Houston in 1883. The GC&SF tracks crossed the Columbia Tap near downtown.

In 1884, the San Antonio & Aransas Pass (SA&AP) Railway was chartered to build a line from San Antonio to Corpus Christi. By 1887, the main line was finished, and construction of a lengthy branch to Houston had begun. It was completed in 1888 with SA&AP's tracks merging into the Columbia Tap near downtown. SA&AP was able to terminate a three-year receivership in 1892 with the help of Southern Pacific (SP) which offered to back interest on SA&AP construction bonds. Because it owned a direct SA&AP competitor, the Galveston, Harrisburg & San Antonio Railway, SP could not buy the SA&AP without running afoul of Texas' railroad competition laws. Instead, it helped the SA&AP in every other way possible, including by supplying key personnel to help staff SA&AP's management ranks. In 1903, SP admitted to unlawful stock ownership of the SA&AP and agreed to accept financial sanctions without trial in exchange for RCT agreeing not to revoke SA&AP's Texas railroad charter. From 1903 through 1924, the SA&AP was independent. SP was allowed to acquire it in 1925.

Left: While under SP control, the SA&AP extended its tracks across the Columbia Tap in 1901 and built north to Buffalo Bayou. It bridged the bayou, crossed another SP line (soon interlocked as Tower 5) and built north to reach the main line of SP's Texas & New Orleans (T&NO) subsidiary near Englewood Yard.
(San Antonio Daily Express, May 29, 1901)

In 1905, the Houston Belt & Terminal (HB&T) Railway was chartered by four railroads to build a downtown Union Station for passengers, and to build and / or lease tracks to establish freight switching services around Houston. As a 25% owner of HB&T, the GC&SF leased portions of its Houston track network to support the goal. In the 1910-1911 timeframe, four interlocking towers were commissioned by RCT to manage HB&T crossings with major railroads. Tower 84 was the first of these to be planned, its purpose being to manage the convergence of the Columbia Tap, GC&SF, SA&AP and HB&T railroads southeast of downtown. It was followed by Towers 85, 86 and 87, all commissioned between August, 1910 and May, 1911. These were not the first towers built by HB&T; Towers 71 and 76 had opened in the 1907-08 timeframe, and planning for Tower 80 had begun though it did not open until 1913.

Right: This snippet from the 1896 Sanborn Fire Insurance index map of Houston has been annotated to show the rail lines southeast of downtown that existed prior to the founding of the HB&T. The I&GN had long owned the Columbia Tap, and it would also acquire the Houston Belt & Magnolia Park (HB&MP) c.1899. The HB&MP had been chartered in 1889 to provide passenger transit to the Magnolia Park amusement center along the banks of Buffalo Bayou a few miles east of downtown Houston. The HB&MP also intended to provide freight switching services, but little of this was ever accomplished until the I&GN acquisition. I&GN wanted the HB&MP tracks as a means of serving the Port of Houston along the south bank of Buffalo Bayou.

The Texas Western (TW) narrow gauge line in the upper left corner of the image did not last long. Its tracks to Sealy were out of service by 1900.

As of 1896, the I&GN was also litigating a lawsuit it had filed to protect its lease of the GH&H. The GH&H was ostensibly owned by the Missouri, Kansas & Texas (MK&T, "Katy") Railway because Jay Gould had bought it and assigned it to the Katy when he served as Katy President. A year later, Gould leased it to the I&GN (where he also was President) since the Katy had no tracks in Houston. After a long, sordid tale of intrigue including Gould's death in 1892, Katy tracks finally reached Houston in 1895 and the now independent Katy sought to break the GH&H lease. The Katy / I&GN litigation was eventually settled with each having half-ownership of the GH&H and unlimited rights to use its tracks.

 
Above Left: The earliest newspaper citation found for the planning of the interlocking that became Tower 84 appeared in the
Houston Post, October 5, 1909. Above Center: On March 29, 1910, the San Antonio Daily Express reported action taken by RCT the previous day to approve the plans for the "interlocking plant being constructed on Walker Avenue in Houston...". What RCT "received for approval" in the Houston Post report six months earlier was not detailed engineering plans, merely a proposal for interlocking the Walker Ave. junction. RCT's approval in October had enabled construction to commence for the tower while the design of the interlocking plant, signals and derails was in work. The final design still needed RCT approval which was granted on March 28. The article indicates that site inspection by well-known RCT engineer R. D. Parker was to be conducted on "Wednesday" (March 30.) Yet... Above Right: ...the Houston Post of May 3, 1910 reported that once again, Parker "...has received the plans..." for this interlocker. Perhaps Parker had identified specific concerns during his inspection for which design rework had been required.
Right: Engineer Parker eventually returned to Houston to perform final inspection on Tower 84. (Houston Post, September 23, 1910)

Tower 84 should have appeared in RCT's published table of active interlockers dated October 31, 1910, but that list ended with Tower 83. In the table published a year later, Tower 84 was listed as a 36-function electrical interlocking plant controlling a junction of the SA&AP, the HB&T (which had leased the GC&SF tracks) and the I&GN (which owned the Columbia Tap) but no commissioning date was provided. In 1916, RCT identified HB&T as the railroad with operational responsibility for staffing Tower 84, but the commissioning date continued to be omitted until 1924 when "February 18, 1918" was supplied. In 1928, the commissioning date was revised to "August 10, 1910", six weeks prior to Engineer Parker's trip to Houston for final inspection. The 1910 date is much more in line with what is known about Tower 84, but it also implies some sort of pre-authorization pending final inspection, perhaps not surprising given Parker's direct involvement dating back to March of that year. With three other HB&T interlockers, Towers 85, 86 and 87, commissioned in April / May, 1911, this was a very busy time for the growth of HB&T's infrastructure.

The 1928 report updated Tower 84's identity to Houston (Walker Ave.) to help distinguish it among the locations of HB&T's interlockers. When RCT stopped publishing its list of active interlockers at the end of 1930, the final table gave Tower 84 a function count of 47, making it the 18th largest among the 151 interlockings in that list.

Left: This Sanborn index map differs from the earlier graphic because it was drawn in 1907. The future site of Tower 84 is annotated in the west quadrant of the SA&AP / HB&T (GC&SF) diamond near the center of the image. The track highlights do not distinguish the portions of the GC&SF that were leased to the HB&T. Precise boundaries are undetermined but the lease probably included most (if not all) of the GC&SF tracks on this graphic. The new connector at the Columbia Tap / GC&SF crossing is presumed to have resulted from HB&T's efforts, most likely related to the new Union Station being built one mile northwest of the center of this map. Note the "AV." label above the ampersand in "GC&SF". Off the map to the left, that roadway is labeled "Walker", hence in 1928, RCT began listing the location of Tower 84 as "Houston (Walker Ave.)" It was not a thoroughfare for vehicles in the vicinity of Tower 84.

Prior to SP's settlement with RCT in 1903 making the SA&AP independent, the SA&AP had built a northeast extension across the Columbia Tap to a new Buffalo Bayou bridge (off the top of the map) to reach SP's Englewood Yard. This created five additional diamonds: four appear on this 1907 graphic and a fifth was immediately north of Buffalo Bayou at Tower 5. This map also shows a new diamond (compared to the 1896 map) at the HB&T's crossing of the GH&H, which was still half-owned by the I&GN. The I&GN had also acquired the former HB&MP line into east Houston, and it had continued to own the Columbia Tap since the 1870s. The blank triangularly-shaped area near the "HB&T" label was I&GN's freight yard.

Right: This 1915 track chart from the Katy Railroad's Office of Chief Engineer conveys the larger context of Tower 84's location within the Houston rail network of the early 20th century. The map has been annotated with the numbered interlocking towers that controlled various junctions. [Not all towers are shown, and some that are did not exist when the map was drawn; the position of the numerals relative to nearby tracks is not indicative of precise tower locations.] The map is rotated 45 degrees so that Northwest is "up".

The map has colored rectangles for the four major passenger stations that were in use at the time: orange, HB&T's Union Station; green, SP's Grand Central Station; purple, the I&GN passenger depot; and blue, the Katy's passenger station. SP's Englewood Yard is the orange dashed rectangle, and the T&NO track (blue dashed line) from the yard to Baer Junction has been added. The mapmaker omitted it by mistake, perhaps due to confusion with the 1901 SA&AP line that paralleled it a mile to the west. Both lines went north to the T&NO main line.

On this map, HB&T's construction of additional tracks led to establishing several interlocking towers around town. Towers 71, 76, 80, 84, 85, 86, 87, 116 and 139 are all attributable to the HB&T, as was Tower 117 off the bottom of the map southwest of Tower 85.

 
Left: The 1925 Sanborn Fire Insurance Map of Houston shows Tower 84 located along the HB&T tracks on Walker Ave. The SA&AP tracks are depicted as the vertical line near the center of the image. The tower was on the southwest side of the diamond near a "Pipe Storage" area for "Horton & Horton Building Contractors".

Above: The cartographer identified the structure as a two-story "Signal Tower". No external stairs are depicted but Barriger's photo vaguely suggests they may have been on the left side of the tower from his viewpoint.


Above: This side by side comparison of aerial images from 1944 (courtesy Texas General Land Office) and 2025 (Google Earth) shows the significant changes that have occurred over eight decades in the vicinity of Tower 84 (yellow dot; the tower is not visible on the 1944 image at this resolution.) The tracks owned by the GC&SF (red arrows) were leased to HB&T, hence the GC&SF was not listed as a participant at Tower 84. HB&T built new tracks (green arrows) from Union Station paralleling the Columbia Tap that merged into the leased GC&SF tracks near Tower 84. It also built the Milby Street roundhouse and shops in 1909; the site remains in use as a locomotive servicing facility. The SA&AP tracks ran along the east side of Tower 84, crossed HB&T's leased tracks at the tower, and crossed tracks farther north that led into the I-GN yard, including the GH&H (light blue arrow.) The I-GN owned the Columbia Tap (pink arrows) and was also a participant at Tower 84, implying that the tower also controlled the Columbia Tap / GC&SF (HB&T) crossing located 400 ft. west of the tower. The I-GN had been acquired by MP in 1925, but it continued to operate under the I-GN name until 1956 when it was fully merged into MP.

On the 2025 image, the multi-use Columbia Tap Trail (blue arrows) has been built upon the Columbia Tap right-of-way (ROW) extending a little over three miles south. The trail does not continue on the Columbia Tap ROW north of the former GC&SF (HB&T) crossing. Instead, it curves west onto the abandoned GC&SF (HB&T) ROW and terminates in approximately a half mile. In the vicinity of the former Columbia Tap / GC&SF (HB&T) crossing, Houston's light rail system has built tracks (light green arrows) atop portions of the abandoned Columbia Tap ROW. Since the GC&SF (HB&T) tracks are abandoned west of Tower 84, the track coming north from South Yard and New South Yard has been redirected (white arrow) to curve onto the original HB&T ROW toward Union Station. The red numerals 1 and 2 mark buildings that were built with curved sides due to the presence of SA&AP sidings, spurs and main track which curved north to pass beside Tower 84. Aerial imagery suggests the SA&AP tracks were removed some time between 1982 and 1995, but development in this area has rendered the former SA&AP ROW virtually undetectable. At least through 1995, the SA&AP bridge over Buffalo Bayou was retained for access (from the north) to a yard on the south side of the bayou, but the bridge does not appear on 2002 imagery.

 
Above Left: Greg Johnson provides this undated photo of the equipment cabinet that replaced Tower 84 with an interlocker controlled remotely by HB&T operators. SP's former SA&AP rails cross in the foreground. The view is east-southeast on the HB&T. Above Right: This c.2008 bird's eye view (Microsoft Visual Earth) shows that not much is left of the former SA&AP ROW. The equipment cabinets that appear on both sides of the HB&T tracks above left are visible in this image, providing a location clue for the SA&AP crossing. The Waddell's Warehouse building remains, although the sign on the wall has changed. In 2009, the building was designated as a historic structure by the City of Houston.
Left: This 1964 aerial image ((c) historicaerials.com) shows Tower 84 in the west quadrant of the diamond casting a shadow to the northwest. It remains standing in 1966 imagery, but 1973 imagery is indeterminate. It is no longer present in 1976 imagery. Note the lengthy shadow cast by the building in the south quadrant of the diamond. This is the same building present in the foreground of the image above right. It is present on 1947 imagery but not on 1930 imagery. The functions of Tower 84 were consolidated into Tower 117 on June 1, 1971. On April 17, 1983, the functions of Towers 81 and 84 were transferred to HB&T's Traffic Operations Center at Houston Union Station.


Left
: This snippet from an April, 1984 SP Employee Timetable instructs train personnel to contact HB&T's Remote Traffic Control office at Union Station for permission to cross the HB&T's two main tracks at Tower 84. A direct speaker-phone connection to the operator was provided nearby.

According to SP historian David Bernstein, Tower 84's interlocking functions were retired in 1988, presumably in conjunction with the removal of the two crossings that Tower 84 controlled, specifically the SA&AP (by then an industrial track for SP) and the Columbia Tap (same for MP.) The fate of the Tower 84 building is undetermined.

In the early 1980s, MP was acquired by Union Pacific (UP) and operated as a wholly-owned subsidiary. In the mid 1990s, UP acquired SP, and within a couple of years, both MP and SP had become fully merged into UP with all operations conducted under the UP name. Of the original four companies that owned the HB&T, three of them (the SLB&M, the Trinity &  Brazos Valley, and the Beaumont, Sour Lake & Western) ended up as part of UP. The GC&SF was the fourth, but long before HB&T's founding in 1905, the GC&SF had been acquired by the Atchison, Topeka & Santa Fe (AT&SF) Railway. The GC&SF continued to operate under its own name until 1965 when it became fully merged into AT&SF. In the mid 1990s, AT&SF merged with Burlington Northern to form Burlington Northern Santa Fe (BNSF.) As a consequence of these mergers, ownership of HB&T was split evenly between UP and BNSF. It still exists, but only as a "paper railroad" for managing financial aspects of real estate, facilities and tracks owned equally by BNSF and UP. HB&T isn't even based in Houston these days. Its official headquarters is a building in Texas City that it shares with another railroad owned equally by UP and BNSF: the Texas City Terminal Railway.

Left: John Treadgold took this photo in the 1980s facing east on the HB&T (original GC&SF) tracks toward Tower 84. In the distance, the HB&T main merges from the left near the Waddell's Warehouse building looming in the background. The switch for the connector to go south on the Columbia Tap is in the foreground. By this date, the Tap no longer crossed the HB&T, but the equipment cabinets at near left mark where it did. From this distance, it is unclear whether the SA&AP crossing was still intact.

Below Left
: This 2006 photo by Tom Kline is taken in the same direction, closer to the equipment cabinets. The HB&T tracks have been removed along with the connecting track and the Tap itself (for three miles south.)

Below Right
: This December, 2014 Google Street View was captured from the new Columbia Tap Trail where it curves south onto Columbia Tap ROW. Again, the view is east toward the Waddell's Warehouse building and the same equipment cabinets remain in place. What appears to be a "paved street" across the image is the Houston Metro light rail double track.
   


Above Left: John Treadgold took this photo in the 1980s facing west toward downtown from a location a bit farther east than in his previous photo. The Tap connector comes in from the left -- note the "Tap" sign. This was the original GC&SF ROW into downtown eventually leased and operated by HB&T. Above Right: This 2006 Tom Kline photo from nearly the same location shows that the small bush beside the "Tap" sign in John Treadgold's photo has either grown much larger over twenty years or been replaced by some other volunteer weed. The tracks have been removed along with a 3-mile segment of the Columbia Tap to the south. Below Left: Ennis Street is the crossing visible in both of the above photos, and it provides the location where this Google Street View was captured facing west in October, 2007. This was eleven months after Tom's photo, and it shows the Columbia Tap trail under construction. Below Right: Seven years later, this December, 2014 Google Street View from the same location and direction shows the completed trail and the associated beautification efforts. The trail terminates a half mile in the distance.
 

 
Above Left: Looking north from McKinney St., the SA&AP main track was bounded by the building on the right (which dates back to at least 1947) and the utility poles on the left. The poles appear to be of more recent vintage. Historic aerial imagery shows that they would have interfered with several short spur / siding tracks in this area used for transloading railcars. Above Right: This view looks west from Sampson St. along the former HB&T main track, now owned by UP. The building to the right is the aforementioned Waddell's Warehouse The equipment cabinets to the right of the tracks mark the former SA&AP crossing. The cabinets in the center of the image beyond the curved track are the same ones shown in the east-facing images further above where the Columbia Tap crossed the GC&SF (HB&T) tracks.
Left: The turntable at the Milby Street facility remains in service for BNSF in this November, 2022 Google Street View. This image was captured from the location where the roundhouse originally stood. Aerial imagery shows that the roundhouse dismantling began after 1953 and was essentially complete by 1957. In its place, the buildings in the background -- for parts storage, office space and servicing locomotives -- were built in the same timeframe (but may have been rebuilt since then - they certainly don't look 65 years old!)

Below: This snippet from the
Houston Post of September 1, 1909 indicates that HB&T built the facility at Milby Street c.1909. The newspaper published a lengthy list of building permits issued by the City of Houston during the twelve months ending the prior day, and the Milby Street facility was the last item in the list.

 

 
Last Revised: 5/6/2026 JGK - Contact the Texas Interlocking Towers Page.