Texas Railroad History - Tower 147 (Lantana) and Tower 151 (Rosita)

Two Crossings of the San Antonio & Aransas Pass Railway and the San Benito & Rio Grande Valley Railroad near San Benito

 


Left: This April, 1999 photo taken by Randy Curlin at the Tower 147 crossing is looking east on the Southern Pacific (SP) line toward Brownsville. The Missouri Pacific (MP) Rio Hondo branch ran from San Benito (right) to Rio Hondo (left) and was abandoned shortly after this photo was taken. The white gatepost is evidence of the swing gate that protected the crossing in the 1970s. Originally, home and distant signals for both rail lines were controlled by a cabin interlocker, a trackside hut that housed the interlocking plant and its controls to be operated by train crews. The signals were always set to allow unrestricted movements on the SP line. MP crews would change them temporarily as needed for their train to cross the diamond.

By the time of this photo, the cabin interlocker had been removed and the crossing was uncontrolled; all trains were required to stop. Trains moved slowly (and infrequently) on these tracks anyway, so the delay incurred by stopping at the crossing was insignificant, certainly worth the cost of otherwise maintaining a cabin interlocking and multiple signals.

In 1982, MP was acquired by Union Pacific (UP) and SP was similarly acquired in a 1996 merger. In 1997, UP fully merged both railroads and began operating solely under the UP name, hence UP was operating both lines in this 1999 photo.

In June, 1903, the St. Louis, Brownsville & Mexico (SLB&M) Railway was chartered to build a line between the Lower Rio Grande Valley and Houston, planning to establish the Valley's initial connection to the national rail network. The SLB&M was the first of the Gulf Coast Lines (GCL), the marketing name for a rail syndicate established by the St. Louis Trust Company that was managed by the St. Louis & San Francisco ("Frisco") Railway. The Frisco's Chairman, B. F. Yoakum, was a native Texan with substantial experience in Texas railroading. It was his idea to create the GCL under which he would build or buy railroads and weave them into a system to compete directly with Southern Pacific (SP) along the Gulf coasts of Texas and Louisiana.

To lead the SLB&M, Yoakum installed his former boss, Uriah Lott, as President. Lott had been the founder, promoter and President of the San Antonio & Aransas Pass (SA&AP) Railway, and he had hired Yoakum in 1886 to be the SA&AP's traffic manager. Yoakum had risen into SA&AP's senior executive ranks, becoming General Manager in 1889. By then, the SA&AP owned lines serving San Antonio, Corpus Christi, Houston, Waco, Kerrville and numerous towns in between. When the SA&AP overextended its network and couldn't pay its construction company, it was forced into receivership in 1890. Lott lost his job, but Yoakum was appointed by the bankruptcy judge to be one of the two Receivers. The bankruptcy ended two years later when the SA&AP's bondholders committee agreed to a plan that involved assistance from SP.

SP did not serve south Texas, so it wanted a healthy SA&AP to supply traffic at points along SP's east / west main line, e.g. San Antonio, Flatonia and Eagle Lake. SP could not legally purchase the SA&AP as that would run afoul of Texas' railroad competition laws. Instead, SP was allowed to guarantee the interest on SA&AP construction bonds as a means of helping to terminate the receivership. Although state law prevented SP from having any control over the SA&AP, the bankruptcy court allowed 80% of SA&AP's stock to be acquired by the Pacific Improvement Company (PIC), a holding company that owned SP and various other assets, mostly real estate. Mifflin Kenedy, owner of 20% of SA&AP's stock, agreed to the plan, and the recently created (1891) Railroad Commission of Texas (RCT) did not object. The new SA&AP ownership promptly filled the management ranks of the reorganized company with numerous "SP men", suggesting that SA&AP would not be truly independent.

Yoakum moved on, taking an executive position with the Gulf, Colorado & Santa Fe (GC&SF) Railway and then becoming General Manager of the Frisco in 1897. By early 1903, Yoakum's plans for a Valley rail line to Houston were known, causing SP to "encourage" construction of a competing line to the Valley from SA&AP's nearest service point, the town of Alice. SA&AP commenced construction out of Alice in September, 1903 toward Edinburg shortly after the SLB&M had begun building south out of Robstown toward Brownsville. By June, 1904, the SA&AP had completed 36 miles to Falfurrias, and a month later, the SLB&M finished the 142 miles from Robstown to Brownsville. Technically, the SLB&M won the race to provide the Valley with access to the national rail network because Robstown had connections to both Alice and Corpus Christi via the Texas Mexican Railway. From those towns, SA&AP had tracks to San Antonio. As the SLB&M prepared to build 200 miles north from Robstown to Houston, the Valley was only 67 miles from Falfurrias of which SA&AP had already graded the first ten miles. But then...SA&AP's construction stopped.

The work stopped because a year earlier, RCT had accused SP of illegal ownership of the SA&AP. The smoking gun was an SP asset report to the Kentucky Railroad Commission (KRC) which listed its ownership of SA&AP stock. [SP management assumed -- but could not prove -- that Yoakum had somehow gotten wind of the report to KRC but did not tip off RCT until it was to his advantage; the timing for Yoakum couldn't have been better.] A public hearing was held by RCT on April 27, 1903 during which SP and SA&AP attorneys admitted that SP had possession of the stock originally held by PIC. A settlement with RCT in the summer of 1903 allowed the SA&AP to avoid forfeiting its Texas railroad charter in exchange for cancelation of the SA&AP stock held by SP (with a corresponding reduction in the SA&AP's authorized capitalization from $5 million to $1 million.) SP was also prohibited from guaranteeing interest on any new SA&AP bond issues, but had to continue to back bonds already sold.

RCT's settlement with SP and SA&AP removed all traces of SP ownership, leaving Mifflin Kenedy's heirs as the new owners. SA&AP construction from Alice toward Edinburg began in September, 1903, but it was doubtful that SA&AP would be able to complete the effort with its existing capital. RCT subsequently allowed SA&AP to sell SP-backed bonds that had already been issued in exchange for SA&AP's agreement to build beyond Edinburg to Brownsville. Nevertheless, SA&AP's work halted at Falfurrias in June, 1904.

In his reference tome, A History of the Texas Railroads (St. Clair Publishing, 1941), S. G. Reed (who began his railroad career as a traffic manager for SA&AP in Victoria) explained the prevailing theory of why SA&AP's extension to the Valley ended abruptly:

"The project was dropped, in June, 1904, for lack of funds and also to quiet the Railroad Commission. The reason officially assigned for discontinuing work was that there was not enough traffic in the Valley to support two lines, but another reason was surmised and may have been controlling, which was that [E. H.] Harriman, who then controlled the S. P., and Yoakum had effected a mutually satisfactory agreement for preferential routing of traffic between their respective systems. It is known that some such agreement was effected about that time and it continued for many years, but that it involved the abandonment by the S. A. & A. P. of the Valley extension is only a surmise."

Left: SA&AP's interest in building to Brownsville was waning with the "Yoakum line...nearly there." RCT eventually relented and allowed SA&AP to defer construction to Brownsville. (Brownsville Daily Herald, May 24, 1904)

With SA&AP's line to the Valley stopped at Falfurrias, the SLB&M completed its northward construction as far as Algoa, 25 miles south of Houston, in 1906. Algoa was on Santa Fe's main line between Galveston and Temple, and a nearby Santa Fe branch from Alvin served downtown Houston. The Galveston Tribune of March 12, 1906 reported that the first SLB&M train to Galveston from Brownsville would be arriving later that day. This was, however, a one time special train, not the start of regular service. The SLB&M had already determined that the grade, ballast and bridge construction between Bay City and Algoa -- a sixty-mile stretch through the Brazos River bottomlands -- was insufficiently engineered to withstand the rainy season. Significant drainage mitigation and track reconstruction projects had to be undertaken. Another special excursion train ran from Brownsville to Galveston on August 14, 1907, seventeen months after the first one (it had been so long that newspapers reported it as "the first train", completely forgetting the earlier one!)

The August excurion was a precursor to regular service between Brownsville and Algoa. On September 9, 1907, the SLB&M announced a regular schedule between Bay City and Algoa, indicating that the track construction and drainage problems had been solved. The schedule was subsequently revised out of Brownsville to match the Bay City schedule, enabling single train service between Brownsville and Algoa. Passengers continued their journey by switching to (or from) Santa Fe trains at Algoa. About six months later, Yoakum was able to negotiate rights for the SLB&M to use Santa Fe's tracks from Algoa to Houston.

Right: The Brownsville Daily Herald of April 13, 1908 reported that the SLB&M's Brownsville - Houston passenger service would commence on April 19.

Twenty-five miles north of Brownsville, the SLB&M had collected a bonus in 1904 for building through a landholding where the town of Harlingen was founded. The SLB&M immediately began building a lengthy branch line out of Harlingen, eventually reaching Rio Grande City in 1906, 73 miles west. In 1910, another syndicate backed by the Frisco began construction on secondary lines in the Valley. Two years later, the San Benito & Rio Grande Valley (SB&RGV) Railway was chartered by Frisco interests to take over this work and finish the construction. SB&RGV operations began in two separate service areas in 1912, reported to RCT as a total of 62.1 miles of track. One area was in the vicinity of the town of Mission; the other was a combined 30 miles of tracks in opposite directions from San Benito leading to Santa Maria to the southwest, and Rio Hondo to the northeast. SLB&M provided connections for the SB&RGV at Mission and San Benito. The SB&RGV was effectively a lower cost branch line operator for the SLB&M.

On May 27, 1913, the Frisco went into receivership and lost control of the GCL railroads and the SB&RGV. The individual GCL railroads had reported independently to Frisco management, so the St. Louis Trust Co. installed a corporate structure for the GCL making the New Orleans, Texas & Mexico (NOT&M) Railroad the parent company through which the other GCL railroads would be owned. The SB&RGV had not been a GCL railroad, but it was acquired by the NOT&M in 1916 and continued its role as a branch line operator for the SLB&M. On January 1, 1925, Missouri Pacific (MP) bought the NOT&M, having gained permission from the Interstate Commerce Commission (ICC.) The ICC had supplanted RCT's control over Texas railroad mergers and acquisitions when the Federal Transportation Act of 1920 took effect. The NOT&M had recently acquired the International & Great Northern Railroad in 1924 which had a large presence across Texas, including a line through San Antonio to Laredo. SP reacted to MP's sudden and substantial competitive posture in south Texas by quickly seeking to re-acquire the SA&AP. Permission from the ICC was granted, and as an SP subsidiary, the SA&AP restarted construction south from Falfurrias on July 30, 1926. This led to an immediate flurry of railroad construction in the Rio Grande Valley.

Left and Below: This image is a snippet of a larger map published by Mike Walker ((c) SPV, 2001.) The former SLB&M main line comes south from Robstown through Harlingen to Brownsville. It is still intact, as is the ex-SA&AP branch between Harlingen and Brownsville. Despite the map's solid line, the San Benito - Rio Hondo branch had been removed in 1999. Map annotations show area interlockers; two are off the map at Edinburg (Towers 145 and 149.)

In response to SP restarting construction to the Valley, MP preemptively built an SLB&M branch line west from Raymondville in 1926. One objective was to reach areas in and around Edinburg before the SA&AP arrived. The branch went through Hargill and Faysville to Monte Christo, and there were additional branches from Hargill to Edcouch and from Faysville to Edinburg. SA&AP rails reached Edinburg in early 1927 and the SA&AP immediately built a 63-mile branch line east to Brownsville. The Brownsville branch crossed the SLB&M main line at Harlingen and also crossed the SB&RGV's Rio Hondo branch near Lantana. With the SA&AP entering Brownsville, MP countered with a 19-mile SB&RGV branch east from San Benito to Abney in 1928 (extended to Port Isabel in 1941.) This branch crossed the SA&AP east of Laureles and north of Los Fresnos, a location RCT recorded as "Rosita."

The first interlocked crossing in the Valley was at Tower 138 (green circle), a 2-story manned tower where the SA&AP built across the SLB&M at Harlingen. It was commissioned on September 10, 1928. The last to be commissioned was Tower 151 (blue circle) on April 17, 1929 where the SB&RGV built across SA&AP's Brownsville branch. It was officially located at Rosita, a name used in SP's interlocker documentation. The map has locations called Laureles and Gray Bill nearby, but it does not show Rosita in the vicinity (nor anywhere else.) A 1932 MP timetable says that "Graybill" was 0.4 miles east of the crossing and Laureles was 0.8 miles west. SP timetables from the 1940s confirm the crossing near Laureles to be the site of Tower 151.

According to RCT records, Tower 147 and Tower 151 were both commissioned as 11-function mechanical cabin interlockers (and both in 1929, on March 13 and April 17, respectively.) From SP documentation for similar cabins, it is likely that these eleven functions consisted of four derails, four home signals, one door lock and two distant signals on the SA&AP, one in each direction to warn approaching trains if the crossing was occupied. The SB&RGV tracks did not need distant signals because SB&RGV trains always stopped at the diamond before crossing.

Right
: This image is a very high magnification of the Tower 146 cabin at Edcouch as it appears in the distant background of a much larger photo taken between 1958 and 1968 (Bill Bentsen collection.) Among the cabin interlockers in the Valley, this is the only one for which an image has been found. It was designed and built by SP, so it is very likely representative of the appearance of the cabins at Tower 147 and Tower 151.

Through the end of 1930, RCT published an annual list of active interlockers. For each interlocker, the list included the railroads involved, the type of interlocking plant, the function count and the location. For all Lower Rio Grande Valley interlockers, the SA&AP and the SLB&M were listed as the railroads involved, even though Tower 147 and Tower 151 were on SB&RGV rail lines. The SLB&M was substantially larger and may have provided the rolling stock for operations on the SB&RGV. In 1956, as MP was being reorganized out of a lengthy bankruptcy, its various NOT&M railroads became fully merged and ceased to exist as separate entities as of March 1 of that year.

Left: (Carl Codney collection, with inset from Railway Signaling, October, 1944) A "D-205" drawing was used by SP to summarize the ...LEVERS, FUNCTIONS AND DIVISION OF EXPENSE AT INTERLOCKING PLANT for each tower where SP had a financial interest. This one for Tower 151 locates it "...at or near Rosita, Texas." Why SP used this name is unknown, and no non-railroad historical use of "Rosita" in this vicinity has been found. The DATE of November 8, 1928 was about five months before the interlocker was approved for service by RCT. From the REMARKS column, it is known that the plant design was released March 20, 1928. This was during a nine day span in which the interlockers for Tower 146 and Tower 149 were also designed (and perhaps Towers 138, 145 and 147 as well, but those D-205 records haven't been located.)

This D-205 drawing is a revision to the original because it was "Revised effective Aug 1 - 1944 account T&NO derails 4 & 8 abandoned" (note inset from
Railway Signailing, October, 1944 reporting this news.) The change resulted in a new expense split of 50 / 50 based on the function count. The "Void" scrawl indicates that there is a later version that became the master document. The last known version records a change dated December 1, 1955 when approach signals were made inoperative on the SB&RGV. As those signals don't appear on the document at left, they must have been added with yet another revision later than this one that preceded the final version. Instead of "Void", the final document has a hand-written note across it...  "Out of service 7-1-69."

The decommissioning of Tower 151 can be attributed to MP's abandonment of the SB&RGV line to Port Isabel in 1969. The document notes that the interlocker is
OPERATED BY "SB&RGV Trainmen", i.e. having stopped at the diamond, an SB&RGV crewmember would enter the cabin to set the controls to permit his train to cross. Once the train was safely across, he would reset the controls for unimpeded operation by the SA&AP. The document also says that the interlocker was MAINTAINED BY "SA&AP Ry". There was no definitive rule as to which railroad would handle maintenance for a cabin interlocker, but it was common for the busier railroad to take the maintenance responsibility.

The image below is from a 1932 MP employee timetable. It describes the cabin interlockers in south Texas as being "with T&NO", the Texas & New Orleans Railroad, SP's principal operating railroad in Texas which leased the SA&AP and most other SP railroads in Texas in 1927. The cabin interlockers listed "will be handled by trainmen", i.e. crew members of trains covered by this timetable. Thus, T&NO trains would normally proceed unimpeded through each interlocker unless the signals indicated that the diamond was occupied by an MP (SLB&M or SB&RGV) train. In the order presented below, the crossing references are Tower 145, Tower 146, Tower 149, Tower 147 and Tower 151.

       

The surprising element to SP's D-205 document for Tower 151 is that the SB&RGV is listed as SENIOR COMPANY even though RCT construction records state that the SB&RGV tracks were laid in 1928, a year after the SA&AP's tracks. By construction date, the SA&AP should have been the senior company. Under state law, the senior company was not required to share the capital outlay for installing an interlocker at a new crossing (i.e. created after the interlocker law became effective in 1901.) For crossings that existed prior to 1901, the capital expense was split equally among the railroads involved. Recurring costs for staffing (manned towers) and maintenance were shared based on the percentage of assigned interlocker functions. Listing the SB&RGV as the SENIOR COMPANY for Tower 151 implies that SP funded the design and installation of Tower 151 even though its tracks were there first. The best conjecture for this is that SP and MP swapped tower construction projects. This identical scenario was reversed at Tower 149 where the SA&AP arrived after the SLB&M yet the SA&AP is listed as the SENIOR COMPANY in the D-205 for Tower 149, imnplying that MP had the funding and construction responsibility.

Why swap projects? The answer is undetermined, but the SB&RGV was the senior company at Tower 147, about 10 rail miles northwest of Tower 151. Thus, SP was responsible for funding Tower 147. As the Tower 147 and Tower 151 interlockers were 11-function mechanical cabins within ten miles of each other involving the same railroads and the same operational scenario (signals normally lined for SA&AP operation), SP may have decided it could design and build Tower 151 simultaneously with Tower 147 at a savings compared to the cost of designing and building Tower 149, which was more than 45 rail miles from Tower 147. Why would MP consent to swapping projects? The SB&RGV was a small railroad with a limited engineering staff that had never been involved with an interlocker. Since the SB&RGV would have needed to call upon MP's engineering staff for the effort, MP may have preferred (or at least been willing) to swap with SP and fund Tower 149 instead of Tower 151.

Left: In 1970, the Tower 147 crossing still had the interlocker cabin sitting in the northwest quadrant casting a shadow to the north.


Right: In 1983, the tracks remained in place but the cabin was no longer present.


Both images (c) historicaerials.com

Right: Randy Curlin took this April, 1999 photo from the southwest quadrant of Tower 147 looking northeast along the MP tracks toward Rio Hondo. It shows MP's homemade stop sign with the SP line crossing in the background. Note the white gatepost also visible in the image at top of page.

Randy's observations of Tower 147:
"The Lantana location was extremely obscure and I doubt that many photos exist. It was the location of the MP Rio Hondo Branch running from San Benito to Rio Hondo crossing the SP line to Brownsville. SP movements had priority. It was protected by a swinging gate (from 1970s MP timetables) then later homemade stop signs (1990s). The branch was sold to the Rio Valley Switching Co to serve a remaining petrochemical firm around 1997. By 1998 the firm stopped shipping by rail and the line was abandoned and removed in 1999."

SP abandoned the former SA&AP main line south to Edinburg in 1979 and began sharing MP's former SLB&M main line to the Valley. In 1982, Union Pacific (UP) acquired MP, and in 1996, UP also acquired SP. By then, SP's former SA&AP branch from Harlingen to Brownsville was the major component of what was left of SP in the Valley. It remains in service as of 2025.


Above: This 1955 USGS Topographic map shows the Tower 151 crossing near the center of the image. Below: Historic aerial imagery was used to identify geographic coordinates that were then mapped onto a Google Maps satellite image. The result is this annotated map showing the MP right-of-way and the location of the Tower 151 crossing. The MP tracks were removed in 1969 and the housing subdivision did not develop until after 1980 by which time the former MP grade had been obliterated by farming and other land uses. There is no longer any sign of the MP grade in this area. The SP tracks (now owned by UP) remain operational.


Above Left: This 1953 image ((c)historicaerials.com) shows that the Tower 151 cabin sat in the northeast quadrant of the diamond. The bright spot to the north on the other side of the SP tracks appears to have been an equipment cabinet. Its smaller shadow suggests it was lower in height than the interlocking cabin. Above Right: The view looking east from Denise Road along the former MP right-of-way shows no sign of the grade. Delta Drive is the roadway to the left. Since the analysis above shows the grade passing north (left) of the nearby house, the red vehicle parked in the driveway would appear to be straddling the invisible MP tracks.

 

 
Last Revised: 11/15/2025 - Contact the Texas Interlocking Towers Website