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When in 1835 the B&O railroad built the Washington Branch from Relay to Washington, DC,
they installed stone mile markers along the route. Engraved into each stone
is the distance from Baltimore and Washington. The values always total 40,
since at the time, that was the distance between the B&O's primary passenger
stations in those cities.
No markers between Baltimore and Relay (the first 8 miles) have been found, suggesting they may never have existed. The map grid locations given below are the locations or expected locations of the markers.
Some of these original markers between Relay and Washington survive to the present. All the known ones are located on the southeast side of the tracks, except at Relay which had markers on both sides until removal by CSX. A steel "S" post can be found at some of the mile locations... they designate the start/end of a measured mile for the purposes of locomotive speed tests.
The table below shows the status of the markers. A ? indicates a location I have not yet checked.
Any comments? EMail me.
| MILE | NEAR | NOTES / PICTURES | ADC MAP |
|---|---|---|---|
| 0 | President Street Station | ? | Ba 43 D 1 |
| 1 | Camden Station | ? | Ba 43 A 1 |
| 2 | Bayard St. | ? | Ba 42 K 3 |
| 3 | Washington Blvd. | NO | Ba 42 H 3 |
| 4 | Claremont Yards | ? | Ba 42 F 4 |
| 5 | Patapsco Ave. | NO | Ba 42 F 6 |
| 6 | 2nd Ave. | ? | Ba 42 D 8 |
| 7 | Hollins Ferry Rd. | ? | Ba 42 C 10 |
| 8 | US 1 | NO | Ba 41 K 11 |
| 9 | Relay | north *, south; both removed 2007 | Ba 41 H 12 |
| 10 | Paradise Ave. | extant * (DH) | Ho 17 K 7 |
| 11 | Patuxent Quarter Rd. | extant *, 0.2 mi too far northeast | Ho 17 J 9 |
| 12 | Smith Ave. | removed, now at B&O Museum | Ho 17 F 10 |
| 13 | Dorsey Station | NO; S post | AA 1 B 12 |
| 14 | End Oak Ave. | removed 2007?; S post | AA 6 A 1 |
| 15 | Montevideo Road | extant | AA 5 J 3 |
| 16 | Jessup | NO | AA 5 G 5 |
| 17 | Jessup Yards | extant * | AA 5 F 7 |
| 18 | Main St. | extant * (DH) | AA 5 E 9 |
| 19 | Water Plant | extant * (DH) | AA 5 B 9 |
| 20 | Pfister Lane | extant * (DH) | AA 4 K 11 |
| 21 | Laurel Racetrack Station | extant * (DH) (RDV) | AA 4 H 13 |
| 22 | Milestone Manor Apts | extant * | PG 4 H 4 |
| 23 | Holly St. | extant * | PG 4 G 7 |
| 24 | Cemetery | buried * (DH) | PG 4 D 8 |
| 25 | Muirkirk Road | extant * | PG 4 B 10 |
| 26 | Ammendale Road | NO, unless buried | PG 4 A 12 |
| 27 | Talbot Ave. | NO, unless buried | PG 7 J 2 |
| 28 | Sunnyside Ave. | extant * | PG 7 J 4 |
| 29 | Lackawanna St. | NO (Greenbelt Metro) | PG 7 H 7 |
| 30 | Greenbelt Road | extant * (DH) | PG 7 G 9 |
| 31 | Paint Branch | NO (Metro); S post | PG 7 F 11 |
| 32 | NOAA | extant * (MH) | PG 12 E 1 |
| 33 | Kennedy St. | + extant * (MH) | PG 12 D 4 |
| 34 | Northwest Branch | extant * (DH) | PG 12 C 6 |
| 35 | Newton Street | extant * (DH) | PG 12 A 8 |
| 36 | 24th Pl. | extant * (DH) | DC 10 J 10 |
| 37 | Kendall St. | NO (original route followed WV Ave.) | DC 10 G 12 |
| 38 | 6th & I St. | NO | DC 10 E 13 |
| 39 | Louisiana & New Jersey Ave. | ? | DC 16 C 2 |
| < 40 | Pennsylvania Ave. & 2nd St. | ? | DC 16 C 2 |
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