| distance | reference number | name | latitude | longitude |
| 507.3 | 1051 | Fredericksburg, Rappahannock River, Virginia | 38.3 | -77.45 |
| 509.8 | 1776 | Massaponax, Rappahannock River, Virginia | 38.25 | -77.4167 |
| 512.0 | 88 | Aquia Creek, Virginia | 38.4167 | -77.35 |
| 515.0 | 2475 | Quantico Creek, Virginia | 38.5167 | -77.2833 |
| 516.4 | 1660 | Liverpool Point, Maryland | 38.4667 | -77.2667 |
| 516.9 | 591 | Clifton Beach, Maryland | 38.4167 | -77.2667 |
| 518.0 | 640 | Corbins Neck, Rappahannock River, Virginia | 38.2167 | -77.2833 |
| 518.5 | 750 | Deep Point, Mattawoman Creek, Maryland | 38.5667 | -77.2167 |
| 519.0 | 1266 | High Point, Occoquan Bay, Virginia | 38.6167 | -77.2 |
| 519.4 | 2536 | Richmond (river locks), James River, Virginia | 37.5333 | -77.4167 |
| 520.0 | 1708 | Lower Rocketts, James River, Virginia | 37.5 | -77.4167 |
| 520.1 | 958 | Falling Creek entrance, James River, Virginia | 37.4333 | -77.4333 |
| 520.2 | 1377 | Indian Head, Maryland | 38.6 | -77.1833 |
| 520.6 | 1319 | Hopyard Landing, Rappahannock River, Virginia | 38.25 | -77.2333 |
| 520.8 | 2537 | Richmond Deepwater Terminal, James River, Virginia | 37.45 | -77.4167 |
| 521.5 | 1771 | Maryland Point Light, Maryland | 38.35 | -77.2 |
| 521.7 | 503 | Chain Bridge, Washington, D.C. | 38.9333 | -77.1167 |
| 522.2 | 3148 | Tulifiny River, I-95 bridge, Broad River, South Car | 32.6017 | -80.9033 |
| 522.6 | 1183 | Gunston Cove, Virginia | 38.6667 | -77.1333 |
| 522.8 | 502 | Chain Bridge, one mile below, Washington, D.C. | 38.9167 | -77.1 |
| 523.0 | 1114 | Glymont, Maryland | 38.6167 | -77.1333 |
| 523.5 | 1519 | Kingsland Reach, James River, Virginia | 37.4 | -77.3833 |
| 523.8 | 286 | Bluff Plantation, Combahee River, South Carolina | 32.6833 | -80.7383 |
| 523.8 | 703 | Cuckolds Creek, Combahee River, South Carolina | 32.7133 | -80.695 |
| 523.8 | 546 | Chester, James River, Virginia | 37.3833 | -77.3833 |