Locks on the C&O Canal

From Wikipedia, the free encyclopedia

The Locks on the C&O Canal in the USA were numbered from 1 to 75 with two locks, 63⅓ and 64⅔, having fractional numbers and no lock 65. There is also a lock at the downstream end of the canal in Washington, DC where Rock Creek flows into the Potomac River which is sometimes called Lock 0 or the Tidewater Lock.

Some of the locks were also informally named, usually after a prominent lockkeeper, a nearby town or important geographical feature. Some locks are known by more than one name and some are only known by their number.

With respect to the fractional locks, it was found that the level of the canal between locks 62 and 66 could be raised in three steps instead of four. So the locks through there were numbered 1⅓ steps apart (62, 63⅓, 64⅔ and 66) so that the canal did not have to be renumbered.

Lock	Miles	Name	Nearby landmarks	Coordinates
0	0.0	Tidewater Lock
1	0.38		Georgetown	38.904° N 77.058° W
2	0.42		Georgetown	38.904° N 77.059° W
3	0.49		Georgetown	38.904° N 77.059° W
4	0.54		Georgetown	38.904° N 77.061° W
5	5.0	Brookmont Lock		38.940° N 77.122° W
6	5.4	Magazine Lock	Little Falls	38.945° N 77.124° W
7	7.0	Chataqua Lock	Glen Echo	38.965° N 77.139° W
8	8.33	Seven Locks 1		38.971° N 77.161° W
9	8.7	Seven Locks 2		38.972° N 77.167° W
10	8.79	Seven Locks 3		38.972° N 77.169° W
11	8.97	Seven Locks 4		38.972° N 77.172° W
12	9.29	Seven Locks 5		38.972° N 77.178° W
13	9.37	Seven Locks 6	American Legion (Cabin John) Bridge	38.972° N 77.179° W
14	9.47	Seven Locks 7		38.972° N 77.181° W
15	13.45	Six Locks 1	Great Falls	38.989° N 77.244° W
16	13.60	Six Locks 2	Great Falls	38.992° N 77.245° W
17	13.99	Six Locks 3	Great Falls	38.996° N 77.248° W
18	13.99	Six Locks 4	Great Falls	38.998° N 77.249° W
19	14.17	Six Locks 5	Great Falls	38.999° N 77.248° W
20	14.30	Six Locks 6 - aka Tavern Lock	Great Falls Tavern	39.000° N 77.248° W
21	16.64	Swain's Lock		39.032° N 77.244° W
22	19.63	Pennyfield Lock		39.054° N 77.289° W
23	22.12	Violette's Lock and Inlet Lock 2		39.067° N 77.329° W
24	23.00	Riley's Lock	Seneca Creek Aqueduct	39.069° N 77.340° W
25	30.8	Edward's Ferry	Poolesville	39.103° N 77.472° W
26	39.4	Wood's Lock		39.216° N 77.458° W
27	41.5	Spinks Ferry	Monocacy Aqueduct	39.191° N 77.471° W
28	48.9	Fulton's Lock	Point of Rocks	39.282° N 77.548° W
29	50.89	Lander Lock or Catoctin Lock		39.307° N 77.559° W
30	55.0		Brunswick, Maryland	39.311° N 77.630° W
31	58.0	Weverton Lock		39.329° N 77.681° W
32	60.23		Sandy Hook, Maryland	39.324° N 77.719° W
33	60.7		Harper's Ferry	39.325° N 77.727° W
34	61.57	Goodheart's Lock	Harper's Ferry	39.333° N 77.739° W
35	62.33		Harper's Ferry	39.337° N 77.751° W
36	62.44		Harper's Ferry	39.337° N 77.753° W
37	66.96	Mountain Lock		39.385° N 77.735° W
38	72.65	Shepherdstown Lock	Shepherdstown, West Virginia	39.435° N 77.798° W
39	74.0	One Mile Lock	James Rumsey Bridge, Snyder's Landing	39.446° N 77.783° W
40	79.41		Horseshoe Bend	39.486° N 77.779° W
41	88.9			39.533° N 77.838° W
42	89.04			39.532° N 77.840° W
43	92.96			39.542° N 77.866° W
44	99.3	Williamsport	Williamsport, Maryland	39.594° N 77.825° W
45	107.27	Two Locks 1		39.614° N 77.926° W
46	107.42	Two Locks 2		39.616° N 77.927° W
47	108.8	Four Locks 1		39.617° N 77.947° W
48	108.8	Four Locks 2		39.616° N 77.948° W
49	108.8	Four Locks 3		39.615° N 77.949° W
50	108.8	Four Locks 4		39.614° N 77.949° W
51	122.59	Hancock 1	Hancock, Maryland
52	122.85	Hancock 2	Hancock, Maryland
53	130.0	Irishman's Lock	Leopard's Mill
54	134.0			39.624° N 78.289° W
55	134.0		Near Dam 6	39.625° N 78.292° W
56	136.2	Sideling Lock	Sideling Hill	39.637° N 78.329° W
57	139.2			39.627° N 78.361° W
58	143.9			39.621° N 78.406° W
59	146.6			39.611° N 78.433° W
60	149.7		Stickpile Hill	39.582° N 78.404° W
61	153.1			39.584° N 78.460° W
62	154.2			39.571° N 78.453° W
63⅓	154.5		Paw Paw Tunnel	39.567° N 78.454° W
64⅔	154.6			39.566° N 78.455° W
66	154.7			39.565° N 78.457° W
67	161.8	Darkey's Lock		39.525° N 78.533° W
68	164.8	Crabtree's Lock		39.530° N 78.589° W
69	166.4	Twigg's Lock
70	166.7	Oldtown
71	167.0
72	174.4	The Narrows or Ten Mile Lock
73	175.4	North Branch 1
74	175.5	North Branch 2
75	175.6	North Branch 3
	184.5	End of the canal	Cumberland, Maryland