| | New Haven Railroad Historical Events |
| | Date | | Category | | Event |
| | 8/28/1863 | | Sale | THE HARTFORD, PROVIDENCE & FISHKILL RAILROAD COMPANY deeded to BOSTON, HARTFORD & ERIE |
| | RAILROAD COMPANY. |
| | 8/1/1868 | | Opening of Service | MILFORD & WOONSOCKET RAILROAD opened, Milford - Bellingham Junction, 3.88 miles. |
| | 8/19/1868 | | Sale | NEW BRITAIN & MIDDLETOWN RAILROAD COMPANY deeded to HARTFORD & NEW HAVEN RAILROAD |
| | COMPANY. |
| | 8/1/1870 | | Opening of Service | NEW HAVEN, MIDDLETOWN & WILLIMANTIC RAILROAD COMPANY opened, New Haven - Willimantic, 50 miles. |
| | 8/1/1871 | | Opening of Service | TAUNTON BRANCH RAILROAD opened. Attleboro to Attleboro Junction (Taunton), about 8.5 miles. |
| | 8/5/1871 | | Opening of Service | NEW HAVEN & DERBY RAILROAD opened, New Haven to Ansonia. 13 miles. |
| | 8/21/1871 | | Opening of Service | DUXBURY & COHASSET RAILROAD opened, Marshfield to South Duxbury. |
| | 8/21/1871 | | Opening of Service | DUXBURY & COHASSET RAILROAD opened, Hartford to Saybrook Point. |
| | 8/1/1872 | | Opening of Service | THE NEW ENGLAND RAILROAD opened, Mechanicsville to Willimantic. |
| | 8/8/1872 | | Merger | THE NEW YORK, NEW HAVEN AND HARTFORD RAILROAD COMPANY formed by consolidation of HARTFORD |
| | & NEW HAVEN RAILROAD COMPANY and THE NEW YORK & NEW HAVEN RAILROAD COMPANY. |
| | 8/11/1873 | | Opening of Service | PROVIDENCE & SPRINGFIELD RAILROAD COMPANY opened line Providence to Pascoag, 23 miles. |
| | 8/13/1873 | | Opening of Service | NEW HAVEN, MIDDLETOWN & WILLIMANTIC line opened Middletown to Willimantic. |
| | 8/5/1874 | | Opening of Service | PAWTUXET VALLEY RAILROAD COMPANY opened, Hope Village to Rives Point on the Hartford, Providence & |
| | Flshkill, 3.2 miles (operated by Hartford, Providence & Fishkill until October 18, 1878, then by The New York & New |
| | England Railroad until December 31, 1879.) |
| | 8/3/1877 | | Opening of Service | COLCHESTER RAILWAY opened, Colchester to Turnerville (now Amston), 3.59 miles, and tne railroad leased to the |
| | BOSTON & NEW YORK AIR LINE for 999 years. |
| | 8/31/1882 | | Lease | BOSTON & NEW YORK AIR LINE RAILROAD COMPANY leased its line, New Haven to Willimantic, to THE NEW |
| | YORK, NEW HAVEN & HARTFORD RAILROAD COMPANY for 99 years. |
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