MARC history - station openings and other significant events

I'm currently writing a more-or-less comprehensive history of MARC service on Wikipedia for public consumption. I've managed to figure out when some stations were opened and closed, and other significant events, but others I have no dates for or am outright missing. I'd appreciate help filling in the gaps. Here's what I have now:

November 1949: B&O service between Frederick and Point of Rocks discontinued
1958: B&O service between Baltimore and Philadelphia discontinued
January 2, 1969: PRR local service between Baltimore and Wilmington discontinued (end of service to Aberdeen, Perryville, Edgewood, Elkton?)
1968: PRR folds into Penn Central
April 29, 1968: First high-level platform opens at Baltimore (for Metroliner service)
May 1, 1971: Amtrak takes over intercity service. Amtrak-run service includes the West Virginian (later Potomac Turbo, then Potomac Special) and the Shenandoah on the B&O main + Metropolitan Branch, plus intercity and local trains on the PRR main. B&O operates Baltimore (Camden) - Washington and Brunswick-Washington service unsubsidized (did Martinsburg and Harpers Ferry have any non-Amtrak service?); Penn Central operates Baltimore (Penn) - Washington service without subsidy.
May 7, 1973: The Potomac Special is cut back to the Martinsburg-Washington Blue Ridge
June 15, 1973: B&O becomes subsidiary of Chessie System
March 1, 1974: MDOT begins 50% subsidy of B&O commuter service
1975: MDOT signs operating agreement with B&O under which the state subsidizes all losses and provides rolling stock
1976: Maryland State Railroad Administration formed
April 1, 1976: Conrail takes over Penn Central commuter service
1976 (?): State Railroad Administration is formed
Late 1970s (?): WVDOT funds Brunswick-Martinsburg shuttles, which are soon combined with Brunswick-Martinsburg runs
April 1, 1977: Conrail threatens to end commuter service; MDOT soon begins subsidy
1978: MDOT leases new Arrow cars from NJDOT
April 30, 1978: Amtrak begins operating the Chesapeake from Philadelphia to Washington using Arrow cars. Stops at Elkton, Perryville, Aberdeen, and Edgewood for the first time since the 1960s.
July 26, 1978: BWI station approved by Amtrak board
June 29, 1979: Washington-Baltimore fares increased by 7%
July 29, 1979: Chesapeake adds stop at Edmonson Avenue
October 26, 1980: BWI Airport station opens (did commuter service immediately stop? It did by 1983.)
Early 1980s (?): Lanham station closed; service moves to Capital Beltway
June 26, 1981: Jericho Park station on Penn Line closed for grade crossing elimination
July 1, 1981: MDOT increases fares by 30%
December 1981: MSRA buys 22 ex-PRR coaches for use on B&O lines
1981: Shenendoah replaced with Capitol Limited
1982: Congress relieves Conrail of commuter service
January 1, 1983: Conrail sheds commuter rail operations. MARC pays Amtrak to operate ex-PRR Baltimore-Washington service. B&O continues to operate the other two lines.
August (?) 1983: MDOT increases frequencies on one Baltimore-Washington service (which one?) from two round trips to five
1983 (?) Capital Beltway closed; service moves to New Carrolton
1983 (?) Edmonson Avenue closed; service moves to West Baltimore
October 24, 1983: Chesapeake service, mostly redundant to MDOT-funded service, is ended
1983-84: MDOT adopts MARC as the brand for commuter service. Both B&O and Amtrak services use MARC-branded timetables and uniforms.
1985: MARC buys first all-new single level cars
1986: Blue Ridge merged into Brunswick Line serving for unified customer experience. Amtrak continues to fund the service until 1992.
1987 (?): Arrows replaced by AEM-7s on Penn Line
April 30, 1987: B&O merged into CSX; CSX continues to operate Camden Line and Brunswick Line
1987: WVDOT buys or leases WV stations from CSX; funds WV service for three years
July 6, 1987: Metropolitan Grove station opens.
1988 (?): Seabrook station upgraded with high-level platforms
February 27, 1989 (?): Bowie station closed; Bowie State station opens at old Jericho Park location. Penn Line service increased from 7 to 13 round trips.
May 1989: Penn Line increased from 13 to 15 round trips
July 31, 1989: Savage (MD32) station opened
May 1, 1991: Penn Line extended to Martin State Airport, Edgewood, Aberdeen, Perryville.
May 1993: Greenbelt station added on Camden Line
January 31, 1994: Laurel Race Track station opened, Berwyn station closed due to low ridership, midday service added on Camden and Brunswick lines
December 12, 1994: Muirkirk (South Laurel) station opened
February 16, 1996: Silver Spring collision
July ?, 1996: Dorsey station opened
???: High-level platforms opened at Odenton
2000: Silver Spring stop moved from old B&O station to Metro station
2001: MARC buys first bilevel cars
December 17, 2001: Frederick Branch reopened with stations at Frederick and Monocacy
September 2007: Long-range plan released. Includes additional tracks, Bayview station (+Upton and Madison Square stops in far future), and Newark/Elkton extension of Penn Line; Bayview extension and triple tracking of Camden Line; triple tracking, Outer Montco station, and Frederick Branch platform at PoR on Brunswick Line; and run-through service to Alexandria
February 2009: $2 surcharge added to fund West Virginia service
Spring 2009: Ticket selling employees replaced with quik-trak machines at most locations
2010-2012: Contract controversy on Camden and Brunswick lines
July 1, 2013: Bombardier takes over service on Camden and Brunswick lines
2013: Update to 2007 long range plan released
August 12, 2013: High-level platforms opened at Halethorpe station
December 7, 2013: Weekend service added on Penn Line

EGE: Your MARC and predecessor history looks good...

Back in the middle 1980s (beginning 1982-83?) - after the NJDOT Arrow MU cars were returned and before the single level MARC cars
and MARC AEM7s went into service: (Peak hours weekday trains)

The Baltimore-Washington Penn Line service was operated with four E60C units and 12 cars - three four car trains were assigned.
These trains terminated at Baltimore back-to-back-to-back on the same track - with then a low level platform. Each train would
arrive at BAL and the E60 units would be coupled to the consist behind each leaving a spare unit at BAL each day - the one that
hauled the first train in line. The 12 cars were MDOT Heritage cars. The spare unit would couple on to the rear of the last train
of the three to terminate in the evening becoming the lead unit on the next morning's first train to WAS.

Another short-lived title was "AMDOT" which was what the Penn Line service was titled in 1983-84 before MARC was created in
1985. During that short period the Penn Line was titled the "AMDOT Line" for the partnership between Amtrak and MDOT...

MACTRAXX

A few points, and I can give you some more additions.

1998 I took Amtrak up to Albany, NY from BWI (second year of Anthrocon, you see). The train I took stopped at Aberdeen. So Amtrak didn't start skiping that stop in 1991.

That said, I do have some data that I can condense down and hand over, as well as a ton of photos that I "leaked" to the Odenton Historical Society.

Looking at some Amtrak timetables, it looks like Aberdeen was never completely dropped from Amtrak after the Chesapeake was discontinued. I found a 1983 article that lists BWI as an AMDOT stop, so it looks like commuter service started stopped soon if not immediately.

Todd and Jim's Railfan Guide to the Capital Beltway Station (http://www.railfanguides.us/md/capitolbeltway/) says that Capital Beltway Station opened on January 16, 1969, but that commuter trains continued using Lanham till 1983, when Amtrak and MARC shifted to the New Carrollton station.

Well, it turns out that's not quite correct; that site relies partially on older and inaccurate versions of a Wikipedia article. That site does have some pictures I'd never seen before, though.

Capital Beltway opened on March 16, 1970 serving Penn Central intercity service, then Amtrak service after A-day. Penn Central (Conrail after April 1, 1976, AMDOT in 1983) commuter service stopped at Landover and Lanham, even after Metro reached New Carrollton and Landover. Conrail moved to Capital Beltway in August 1982; both Amtrak and AMDOT moved to New Carrollton on October 30, 1983. Here's a July 1983 article that mentions AMDOT at Capital Beltway.

Here's an update with some other tidbits I've found:

November 1949: B&O service between Frederick and Point of Rocks discontinued
1958: B&O service between Baltimore and Philadelphia discontinued
January 2, 1969: PRR local service between Baltimore and Wilmington discontinued (end of service to Aberdeen, Perryville, Edgewood, Elkton?)
1968: PRR folds into Penn Central
April 29, 1968: First high-level platform opens at Baltimore (for Metroliner service)
May 1, 1971: Amtrak takes over intercity service. Amtrak-run service includes the West Virginian (later Potomac Turbo, then Potomac Special) and the Shenandoah on the B&O main + Metropolitan Branch, plus intercity and local trains on the PRR main. B&O operates Baltimore (Camden) - Washington and Brunswick-Washington service unsubsidized (did Martinsburg and Harpers Ferry have any non-Amtrak service?); Penn Central operates Baltimore (Penn) - Washington service without subsidy.
May 7, 1973: The Potomac Special is cut back to the Martinsburg-Washington Blue Ridge
June 15, 1973: B&O becomes subsidiary of Chessie System
March 1, 1974: MDOT begins 50% subsidy of B&O commuter service
1975: MDOT signs operating agreement with B&O under which the state subsidizes all losses and provides rolling stock
1976: Maryland State Railroad Administration formed
April 1, 1976: Conrail takes over Penn Central commuter service
1976 (?): State Railroad Administration is formed
Late 1970s (?): WVDOT funds Brunswick-Martinsburg shuttles, which are soon combined with Brunswick-Martinsburg runs
April 1, 1977: Conrail threatens to end commuter service; MDOT soon begins subsidy
???: Hyattsville station closed on Camden Line (between 1978 and 1981)
1978: MDOT leases new Arrow cars from NJDOT
April 30, 1978: Amtrak begins operating the Chesapeake from Philadelphia to Washington using Arrow cars. Stops at Elkton, Perryville, Aberdeen, and Edgewood for the first time since the 1960s.
July 26, 1978: BWI station approved by Amtrak board
June 29, 1979: Washington-Baltimore fares increased by 7%
July 29, 1979: Chesapeake adds stop at Edmonson Avenue
October 26, 1980: BWI Airport station opens for Amtrak and Conrail trains
October 1980: MDOT attempts to end Penn and Brunswick Line service
May 1981: Penn and Brunswick Line service given reprieve, though threatened by Reagan budget
June 26, 1981: Jericho Park station on Penn Line closed for grade crossing elimination
July 1, 1981: MDOT increases fares by 30%
December 1981: MSRA buys 22 ex-PRR coaches for use on B&O lines
1981: Shenendoah replaced with Capitol Limited
1982: Congress relieves Conrail of commuter service
August 1982: Landover and Lanham closed; service moves to Capital Beltway
January 1, 1983: Conrail sheds commuter rail operations. MARC pays Amtrak to operate ex-PRR Baltimore-Washington service as "AMDOT". B&O continues to operate the other two lines.
July 5, 1983: AMDOT increased from 2 daily round trips to 4, including a reverse peak trip
???: Frederick Road station closed on Penn Line: I've seen one source indicating it was closed before 1979, and one that it was still open in 1980, Definitely closed by 1986.
???: Hyattsville station closed on Camden Line, sometime between 1981 and 1986
1983 (?) Edmonson Avenue closed; service moves to West Baltimore
October 24, 1983: Chesapeake service, mostly redundant to MDOT-funded service, is ended. Capital Beltway closed; service moves to New Carrolton
1983-84: MDOT adopts MARC as the brand for commuter service. Both B&O and Amtrak services use MARC-branded timetables and uniforms.
1985: MARC buys first all-new single level cars
1986: Blue Ridge merged into Brunswick Line serving for unified customer experience. Amtrak continues to fund the service until 1992.
1987 (?): Arrows replaced by AEM-7s on Penn Line
April 30, 1987: B&O merged into CSX; CSX continues to operate Camden Line and Brunswick Line
1987: WVDOT buys or leases WV stations from CSX; funds WV service for three years
July 6, 1987: Metropolitan Grove station opens.
1988 (?): Seabrook station upgraded with high-level platforms
February 27, 1989 (?): Bowie station closed; Bowie State station opens at old Jericho Park location. Penn Line service increased from 7 to 13 round trips.
May 1989: Penn Line increased from 13 to 15 round trips
July 31, 1989: Savage (MD32) station opened
1990: Plans for spur from Dorsey Road to BWI
May 1, 1991: Penn Line extended to Martin State Airport, Edgewood, Aberdeen, Perryville.
May 1993: Greenbelt station added on Camden Line
January 31, 1994: Laurel Race Track station opened, Berwyn station closed due to low ridership, midday service added on Camden and Brunswick lines
December 12, 1994: Muirkirk (South Laurel) station opened
February 16, 1996: Silver Spring collision
July ?, 1996: Dorsey station opened
???: High-level platforms opened at Odenton
2000: Silver Spring stop moved from old B&O station to Metro station
2001: MARC buys first bilevel cars
December 17, 2001: Frederick Branch reopened with stations at Frederick and Monocacy
September 2007: Long-range plan released. Includes additional tracks, Bayview station (+Upton and Madison Square stops in far future), and Newark/Elkton extension of Penn Line; Bayview extension and triple tracking of Camden Line; triple tracking, Outer Montco station, and Frederick Branch platform at PoR on Brunswick Line; and run-through service to Alexandria
February 2009: $2 surcharge added to fund West Virginia service
Spring 2009: Ticket selling employees replaced with quik-trak machines at most locations
2010-2012: Contract controversy on Camden and Brunswick lines
July 1, 2013: Bombardier takes over service on Camden and Brunswick lines
2013: Update to 2007 long range plan released
August 12, 2013: High-level platforms opened at Halethorpe station
December 7, 2013: Weekend service added on Penn Line

Nov 5, 2003: Tornado touches down, dropping trees on the Brunswick line.

June 21, 2010: MARC 538 (consisting of an HHP-8 and nine passenger cars) breaks down in 94 Degree F weather, shutting down head-end power. Train staff concentrate more on getting the engine working again, neglecting passengers. Passengers start self-evacuating, 911 is called, and ten passengers are treated for head-related illnesses. This causes MARC and Amtrak to develop an emergency reaction plan, reform train sets to have a maximum of eight passenger cars, and change train schedules (for the better, as some have found out).

October 27-30, 2012: Hurricane Sandy shuts down service until Halloween, which showed the true horror of what was left behind. Amtrak reduces service while MARC is full service. Power was out at many stations, communications out at BWI and New Carrolton Amtrak stations. Station service (and signals on one track) are restored by the next day.