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Head of navigation

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25: 254: 203:, the entirety of a navigable waterway up to the head of navigation is subject to federal jurisdiction. The government recognizes that the "upper limit" of navigability will "often be the same point traditionally recognized as the head of navigation" but may under some circumstances lie "yet farther upstream." 291: 89: 137:
of the ship being contemplated for navigation and the seasonal water level. On others, it is quite objective, being caused by a
61: 133:. Determining the head of navigation can be subjective on many streams, as the point may vary greatly with the size or the 196:, where the river can become treacherously narrow and shallow for anything but small motorboats and human-powered vessels. 176:, which has the lowest headroom of any bridge on the Thames that generally restricts navigation to smaller vessels such as 68: 42: 284: 108: 75: 164:
may have several heads of navigation depending on the size of the vessel. In the case of the Thames, that includes
310: 57: 46: 315: 277: 220: 35: 82: 265: 8: 153:. Several rivers in a region may have their heads of navigation along a line called the 185: 261: 304: 200: 181: 165: 169: 161: 134: 189: 126: 177: 150: 142: 168:, which historically served as the head of navigation for tall ships; 154: 138: 24: 193: 173: 130: 253: 146: 223:", Hidden Hydrology, Oct. 27, 2018; accessed 2023.05.15. 49:. Unsourced material may be challenged and removed. 302: 285: 260:This article related to water transport is a 292: 278: 109:Learn how and when to remove this message 303: 16:Farthest navigable point up a waterway 248: 47:adding citations to reliable sources 18: 188:, the first lock downstream of the 13: 14: 327: 252: 125:is the farthest point above the 23: 221:Bring Me the Head of Navigation 34:needs additional citations for 235: 226: 213: 1: 206: 141:, a low bridge that is not a 264:. You can help Knowledge by 7: 184:, and the long reach above 10: 332: 247: 160:Longer rivers such as the 129:that can be navigated by 192:, on the outskirts of 311:Water transport stubs 316:Nautical terminology 58:"Head of navigation" 43:improve this article 241:33 CFR § 329.11(b). 149:without navigation 123:head of navigation 273: 272: 119: 118: 111: 93: 323: 294: 287: 280: 256: 249: 242: 239: 233: 230: 224: 217: 127:mouth of a river 114: 107: 103: 100: 94: 92: 51: 27: 19: 331: 330: 326: 325: 324: 322: 321: 320: 301: 300: 299: 298: 246: 245: 240: 236: 232:33 CFR § 329.7. 231: 227: 218: 214: 209: 115: 104: 98: 95: 52: 50: 40: 28: 17: 12: 11: 5: 329: 319: 318: 313: 297: 296: 289: 282: 274: 271: 270: 257: 244: 243: 234: 225: 211: 210: 208: 205: 190:river’s source 186:St John's Lock 182:cabin cruisers 117: 116: 31: 29: 22: 15: 9: 6: 4: 3: 2: 328: 317: 314: 312: 309: 308: 306: 295: 290: 288: 283: 281: 276: 275: 269: 267: 263: 258: 255: 251: 250: 238: 229: 222: 219:Jason King, " 216: 212: 204: 202: 201:United States 197: 195: 191: 187: 183: 179: 175: 171: 167: 166:London Bridge 163: 158: 156: 152: 148: 144: 140: 136: 132: 128: 124: 113: 110: 102: 91: 88: 84: 81: 77: 74: 70: 67: 63: 60: –  59: 55: 54:Find sources: 48: 44: 38: 37: 32:This article 30: 26: 21: 20: 266:expanding it 259: 237: 228: 215: 198: 170:Osney Bridge 162:River Thames 159: 122: 120: 105: 96: 86: 79: 72: 65: 53: 41:Please help 36:verification 33: 178:narrowboats 305:Categories 207:References 143:drawbridge 69:newspapers 155:fall line 139:waterfall 194:Lechlade 99:May 2023 199:In the 145:, or a 83:scholar 174:Oxford 85:  78:  71:  64:  56:  151:locks 135:draft 131:ships 90:JSTOR 76:books 262:stub 180:and 121:The 62:news 172:in 157:. 147:dam 45:by 307:: 293:e 286:t 279:v 268:. 112:) 106:( 101:) 97:( 87:· 80:· 73:· 66:· 39:.

Index


verification
improve this article
adding citations to reliable sources
"Head of navigation"
news
newspapers
books
scholar
JSTOR
Learn how and when to remove this message
mouth of a river
ships
draft
waterfall
drawbridge
dam
locks
fall line
River Thames
London Bridge
Osney Bridge
Oxford
narrowboats
cabin cruisers
St John's Lock
river’s source
Lechlade
United States
Bring Me the Head of Navigation

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