Question: When was the MoPac railroad line abandoned in McLain, Kansas?

Context articles: Missouri Pacific Railroad
V&amp;S Railway
Western New York and Pennsylvania Railroad (2001)
West Side Line (NYCRR)
McLain, Kansas
Milford Branch
Buffalo Line
Kansas City, Clinton and Springfield Railway
Texas State Highway Loop 1
East Junction Branch

The Missouri Pacific Railroad (reporting mark MP) , commonly abbreviated MoPac, with nickname of The Mop, was one of the first railroads in the United States west of the Mississippi River.
 MoPac was a Class I railroad growing from dozens of predecessors and mergers, including the St. Louis, Iron Mountain and Southern Railway (SLIMS), Texas and Pacific Railway (TP), Chicago and Eastern Illinois Railroad (C&EI), St. Louis, Brownsville and Mexico Railway (SLBM), Kansas, Oklahoma and Gulf Railway (KO&G), Midland Valley Railroad (MV), San Antonio, Uvalde and Gulf Railroad (SAU&G), Gulf Coast Lines (GC), International-Great Northern Railroad (IGN), New Orleans, Texas and Mexico Railway (NOTM), Missouri-Illinois Railroad (MI), as well as the small Central Branch Railway (an early predecessor of MP in Kansas and south central Nebraska), and joint ventures such as the Alton and Southern Railroad (AS).
The V&S Railway (reporting mark VSR) is a shortline railroad that operates two disconnected lines in the U.S. state of Kansas.
 It is affiliated with A&K Railroad Materials, a scrap dealer whose primary business is buying marginal rail lines with the intent of abandoning them and selling the material as scrap for immediate cash.
 The company acquired its first line, a former Atchison, Topeka and Santa Fe Railway line between Medicine Lodge and a BNSF Railway junction at Attica, from the Central Kansas Railway in 2000.
 In 2006 it expanded its operations by acquiring from the Hutchinson and Northern Railway (reporting mark HN) a short segment of former interurban in eastern Hutchinson, where it interchanges with the BNSF Railway, Union Pacific Railroad, and Kansas and Oklahoma Railroad.
 The V&S also operates a line in Colorado as the Towner Railway, which began serving a former Missouri Pacific Railroad line that had most recently been the Colorado, Kansas and Pacific Railway in 2005.
 Other railroads under common control with the V&S are the out-of-service Kern Valley Railroad in Colorado, the Gloster Southern Railroad in Louisiana and Mississippi, the Grenada Railway and Natchez Railway in Mississippi, a portion of the former Rock Island from St. Louis to Union, Missouri operated by the Missouri Central and the Southern Manitoba Railway in Manitoba.
The Western New York and Pennsylvania Railroad (reporting mark WNYP) is a short-line railroad that operates freight trains in Western New York and Northwest Pennsylvania, United States.
 The company is controlled by the Livonia, Avon and Lakeville Railroad, with which it does not connect.
 It started operations in 2001 on the Southern Tier Extension, a former Erie Railroad line between Hornell and Corry, owned by the public Chautauqua, Cattaraugus, Allegany and Steuben Southern Tier Extension Railroad Authority (STERA).
 Through acquisitions and leases, the line was extended from Corry to Meadville in 2002 and to Oil City in 2006, and in 2007 the WNY&P leased and sub-leased portions of the north-south Buffalo Line, a former Pennsylvania Railroad line mostly built by a predecessor of the defunct Western New York and Pennsylvania Railway.
 The two lines cross at Olean.
The West Side Line, also called the West Side Freight Line, is a railroad line on the west side of the New York City borough of Manhattan.
 North of Penn Station, from 34th Street, the line is used by Amtrak passenger service heading north via Albany to Toronto; Montreal; Niagara Falls; Rutland, Vermont; and Chicago.
 South of Penn Station, a 1.45 mi elevated section of the line abandoned since 1980 has been transformed into an elevated park called the High Line.
 The south section of the park from Gansevoort Street to 20th Street opened in 2009 and the second section up to 30th Street opened in 2011.
McLain is an unincorporated community in Harvey County, Kansas, United States.
 Various maps and documents have listed the name as McLain, McLains, McLain's, and McClain.
 The community was located along the Missouri Pacific Railroad line between Newton and Whitewater, but the track was abandoned in 2003.
The Milford Branch was a railroad line in Massachusetts.
 The line formerly ran from Milford to Framingham, traveling through Holliston and Sherborn, connecting to the Boston Subdivision in Framingham and the Milford Secondary in Milford.
 The line was originally part of the Boston and Albany Railroad, and the end of the line was later abandoned under Penn Central, before the rest of the line was abandoned by Conrail.
 Although the line passes through Sherborn and terminates in Framingham, the majority of the line lies in Holliston.
The Buffalo Line is a railroad line owned by the Norfolk Southern Railway in the U.S. states of New York and Pennsylvania.
 The line runs from Buffalo, New York southeast to Rockville, Pennsylvania near Harrisburg, Pennsylvania along a former Pennsylvania Railroad line.
 Its north end is at Seneca Yard in Buffalo, with no direct access to the Lake Erie district, and its south end is at the Pittsburgh Line at Rockville.
 The line is operated by the Buffalo and Pittsburgh Railroad between Buffalo and Machias, New York, the Western New York and Pennsylvania Railroad between Machias and Driftwood, Pennsylvania, and the Norfolk Southern Railway between Driftwood and Rockville.
The Kansas City, Clinton and Springfield Railway, also known as the Leaky Roof Railway, is a now abandoned rail line that ran from Olathe, Kansas, near Kansas City, through Clinton, Missouri, and on to Ash Grove, Missouri, where it tied in with the Kansas City, Fort Scott and Gulf Railway, later the Frisco Railroad.
 A short branch line served Pleasant Hill, Missouri.
 It was founded in 1884, as a subsidiary of the KCFS&G; on February 12, 1885, the railroad was incorporated in Missouri.
 The line was later bought by the Frisco (St. Louis-San Francisco Railway) in 1928.
 After consolidation with the Frisco, the route was deemed redundant to the parallel and better constructed Frisco "Highline".
 Seeking to cut costs, the Frisco chose to abandon the line in 1934.
 Because it ran parallel to the Frisco's Highline, the two railroads intersected at many places.
 Thus, the Frisco chose to consolidate the two lines into one by keeping the track of whichever railroad had the favorable route between these numerous crossings.
 The less favorable sections were then removed.
 Service continued over these portions of the line with a daily except Sunday local until the mid-1970s, when dam construction and bridge fires ended through service on the route between Kansas City and Springfield, Missouri.
 Operating for a while as a North and South branch line, services were cut and the line was, section by section, successively abandoned.
 Although the rails are now gone, traces can be found along Route 7 and Route 13, however along most sections, little remains to be seen.
Loop 1 is a freeway which provides access to the west side of Austin in the U.S. state of Texas.
 It is named Mopac Expressway (or, according to some highway signs, Mopac Boulevard) after the Missouri Pacific Railroad (or "MoPac").
 Local residents will invariably use the name "MoPac" rather than calling the road by its number which can cause much confusion as few signs along the road use this name.
The East Junction Branch is a railroad line owned and operated by the Providence and Worcester Railroad in the U.S. state of Rhode Island and by the Massachusetts Bay Transportation Authority in Massachusetts.
 The line runs from the P&W's East Providence Branch in East Providence, Rhode Island northeast to Amtrak's Shore Line (Northeast Corridor) at East Junction in Attleboro, Massachusetts along a former New York, New Haven and Hartford Railroad line.
 In Massachusetts, CSX Transportation operates local freight service via trackage rights, which it also has on the Shore Line north towards Boston.
 The P&W has overhead trackage rights in Massachusetts over the East Junction Branch, Shore Line, and CSX's Middleboro Subdivision, New Bedford Subdivision, and Fall River Subdivision to the state line in Fall River, to reach its line to Newport, Rhode Island.