# COMAR Title 08 — Department of Natural Resources

## Subtitle 18 — Boating — Speed Limits and Operation of Vessels

### Chapter 21 — Potomac River

#### Regulation .02 Upper Potomac River.

*COMAR 08.18.21.02*

A. The Upper Potomac River areas, with their corresponding speed limits, are set forth in §§B—J of this regulation.

B. Fish and Game Club Area. The Fish and Game Club area encompasses the area northeast of a line beginning at a point on shore, at or near Lat. 39°33.104'N., Long. 77°52.965' W., then running 214° (True) to a point, at or near Lat. 39º 33.066' N., Long. 77° 52.998' W., then running 123° (True) to a point, at or near Lat. 39º 32.696' N., Long. 77°52.256' W., then running 45° (True) to a point on shore, at or near Lat. 39°32.728' N., Long. 77° 52.215' W. This area has a 6-knot speed limit all year.

C. Williamsport Dam. The Williamsport Dam encompasses the area beginning 200 yards above the Potomac Edison Dam at Williamsport, at or near Lat. 39° 35.810'  N., Long. 77° 49.705' W., then running 262° (True) to a point, at or near Lat. 39° 35.795'  N., Long. 77° 49.850' W., extending upriver to the bridge at U.S. Highway Route 11, at or near Lat. 39° 35.987'  N., Long. 77° 49.578' W., then running 274° (True) to a point, at or near Lat. 39° 36.008'  N., Long. 77° 49.938' W.  This area has a 6-knot speed limit all year.

D. Dam Number 3. Dam Number 3 encompasses the area starting at Dam Number 3, at or near Lat. 39° 20.225'  N., Long. 77° 45.038' W., then running 208° (True) to a point, at or near Lat. 39° 20.127'  N., Long. 77° 45.107' W., then running 155° (True) to a point, at or near Lat. 39° 19.957'  N., Long. 77° 45.007' W., and extending upriver to a line beginning at a point, at or near Lat. 39° 22.717'  N., Long. 77° 45.017' W., then running 247° (True) to a point, at or near Lat. 39° 22.667'  N., Long. 77° 45.167' W. This area has a 35-knot speed limit Saturdays, Sundays, and State holidays, all year.

E. Dam Number 4. Dam Number 4 encompasses the area starting 200 yards upriver of the Dam, at or near Lat. 39° 29.780'  N., Long. 77° 49.713' W., then running 192° (True) to a point, at or near Lat. 39° 29.633'  N., Long. 77° 49.755' W., and extending upriver to a line beginning at a point, at or near Lat. 39° 33.683'  N., Long. 77° 52.550' W., then running 297° (True) to a point, at or near Lat. 39° 33.817'  N., Long. 77° 52.883' W. This area has a 35-knot speed limit Saturdays, Sundays, and State holidays, all year.

F. Dam Number 5. Dam Number 5 encompasses the area starting 200 yards upriver of the Dam, at or near Lat. 39° 36.478'  N., Long. 77° 55.425' W., then running 215° (True) to a point, at or near Lat. 39° 36.397'  N., Long. 77° 55.498' W., and extending upriver to a line beginning at a point , at or near Lat. 39° 36.510'  N., Long. 77° 58.058' W., then running 146° (True) to a point, at or near Lat. 39° 36.438'  N., Long. 77° 57.995' W., 100 yards downriver of McCoy's Ferry. This area has a 35-knot speed limit Saturdays, Sundays, and State holidays, all year.

G. Dargen Bend boat launch area encompasses the area beginning at a point 200 yards upriver of the launch ramp, at or near Lat. 39° 21.925'  N., Long. 77° 44.500' W., then running 260° (True) to a point on the opposite side of the river, at or near Lat. 39° 21.907'  N., Long. 77° 44.635' W., and extending 100 yards downriver of the launch ramp to a point, at or near Lat. 39° 21.785'  N., Long. 77° 44.432' W., then running 261° (True) to a point on the opposite side of the river, at or near Lat. 39° 21.763'  N., Long. 77° 44.600' W. This area is designated a minimum wake zone all year.

H. Big Slackwater boat launch area encompasses the area beginning at a point 200 yards upriver of the launch ramp, at or near Lat. 39° 30.138'  N., Long. 77° 50.740' W., then running 249° (True) to a point, at or near Lat. 39° 30.102'  N., Long. 77° 50.862' W., and extending 100 yards downriver of the launch ramp to a point, at or near Lat. 39° 29.993'  N., Long. 77° 50.693' W., then running 249° (True) to a point, at or near Lat. 39° 29.963'  N., Long. 77° 50.792' W.  This area is designated a minimum wake zone all year.

I. Four Locks boat launch area encompasses the area beginning at a point 200 yards upriver of the launch ramp, at or near Lat. 39° 36.803'  N., Long. 77° 56.693' W., then running 54° (True) to a point, at or near Lat. 39° 36.853'  N., Long. 77° 56.605' W., and extending 100 yards downriver of the launch ramp to a point, at or near Lat. 39° 36.913'  N., Long. 77° 56.795' W., then running 54° (True) to a point, at or near Lat. 39° 36.970'  N., Long. 77° 56.695' W. This area is designated a minimum wake zone all year.

J. McCoy's Ferry boat launch area encompasses the area beginning at a point 200 yards upriver of the launch ramp, at or near Lat. 39° 36.412'  N., Long. 77° 58.217' W., then running 141° (True) to a point, at or near Lat. 39° 36.360'  N., Long. 77° 58.162' W., then running 28° (True) to a point, and extending 100 yards downriver of the launch ramp to a point, at or near Lat. 39° 36.510'  N., Long. 77° 58.058' W., then running 146° (True) to a point, at or near Lat. 39° 36.438' N., Long. 77° 57.995' W.  This area is designated a minimum wake zone all year.