| distance | reference number | name | latitude | longitude |
| 9.2 | 273 | Bladensburg, Anacostia River, Maryland | 38.9333 | -76.9383 |
| 11.6 | 233 | Benning Bridge, Anacostia River, Washington, D.C. | 38.9 | -76.9667 |
| 12.3 | 1271 | Hills Bridge (Route 4), Maryland | 38.8 | -76.7167 |
| 14.3 | 59 | Anacostia Bridge, Anacostia River, Washington, D.C. | 38.8667 | -77 |
| 14.5 | 494 | Cedar Point, Severn River, Virginia | 39.0667 | -76.5667 |
| 14.8 | 1106 | Gingerville Creek, Maryland | 38.9667 | -76.55 |
| 14.9 | 880 | Edgewater, South River, Maryland | 38.95 | -76.55 |
| 15.3 | 3268 | Washington, Potomac River, D.C. | 38.8733 | -77.0217 |
| 15.9 | 335 | Brewer Point, Severn River, Maryland | 39.0333 | -76.5333 |
| 16.6 | 2509 | Reagan National Airport, Washington, D.C. | 38.85 | -77.0333 |
| 17.0 | 2533 | Rhode River (County Wharf), Maryland | 38.8833 | -76.5333 |
| 17.1 | 222 | Bellevue, Washington, D.C. | 38.8333 | -77.0333 |
| 17.1 | 1495 | Key Bridge, Washington, D.C. | 38.9 | -77.0667 |
| 17.3 | 2059 | Nottingham, Patuxent River, Maryland | 38.7167 | -76.7 |
| 18.3 | 35 | Alexandria, Virginia | 38.8 | -77.0333 |
| 18.3 | 1065 | Galesville, West River, Maryland | 38.8333 | -76.5333 |
| 18.7 | 2748 | Shady Side, West River, Maryland | 38.85 | -76.5167 |
| 18.8 | 502 | Chain Bridge, one mile below, Washington, D.C. | 38.9167 | -77.1 |
| 18.9 | 75 | Annapolis (US Naval Academy), Severn River, Marylan | 38.9833 | -76.48 |
| 18.9 | 3169 | U.S. Naval Academy, Annapolis, Maryland | 38.9833 | -76.48 |
| 19.3 | 1825 | Middle Branch, Patapsco River, Baltimore Harbor, Ma | 39.2667 | -76.6333 |
| 19.6 | 503 | Chain Bridge, Washington, D.C. | 38.9333 | -77.1167 |
| 20.5 | 1251 | Hawkins Point, Patapsco River, Maryland | 39.2083 | -76.5333 |
| 20.6 | 953 | Fairhaven, Herring Bay, Maryland | 38.75 | -76.55 |
| 20.8 | 1167 | Greenbury Point Shoal Light, Maryland | 38.9667 | -76.45 |