South Dakota Administrative Rules
Title 70 - Department of Transportation
Article 70:01 - Administration - Highway Safety Signs and Notices
Chapter 70:01:02 - Speed limits
Section 70:01:02:09 - Lawrence County

(1) State Trunk Highway 34 beginning at the west platted limits of St. Onge, then 0.4 mile to the south platted limits, 40 miles per hour;

(2) U.S. Highway 14A beginning at the junction with Colorado Boulevard just east of the east Spearfish city limits, then southerly for approximately 19 miles to the junction with U.S. Highway 85 at Cheyenne Crossing, 35 miles per hour;

(3) U.S. Highway 14A beginning at the junction with U.S. Highway 85 at the north edge of Deadwood, then easterly for 0.09 mile, 35 miles per hour; then easterly for 0.45 mile, 50 miles per hour; then easterly for 6.16 miles, 55 miles per hour; then easterly for 2.09 miles to the Meade County Line, 45 miles per hour;

(4) U.S. Highway 85 beginning at the junction with U.S. Highway 14A near the north city limits of Deadwood, then northerly for 1.19 mile, 45 miles per hour; then northerly for 2.71 miles, 55 miles per hour;

(5) State Trunk Highway 34 beginning 0.4 mile north of the centerline of Interstate Highway 90 at Exit 23, then southerly for 0.15 mile, 45 miles per hour; then southerly for 0.37 mile, 30 miles per hour;

(6) U.S. Highway 14A beginning at the junction of U.S. Highway 85 at Cheyenne Crossing, then northeast for 4.3 miles, 55 miles per hour; then northeast for 2.91 miles, 40 miles per hour; then northeast for 0.49 mile to the junction of U.S. Highway 85 in Lead, 25 miles per hour;

(7) U.S. Highway 85 beginning at the west city limits of Lead, then east for 0.8 mile, 25 miles per hour; then easterly for 0.5 mile, 20 miles per hour; then easterly for 0.8 mile, 25 miles per hour; then easterly to the junction with U.S. Highway 385, Pluma junction, 35 miles per hour;

(8) U.S. Highway 385 beginning at the junction with U.S. Highway 85 in Deadwood, then southeasterly 1.0 mile, 35 miles per hour; then southeasterly 5.87 miles, 45 miles per hour; then southeasterly 12.92 miles to the Pennington County line, 55 miles per hour;

(9) U.S. Highway 85 beginning at the junction of U.S. Highway 385 in the City of Deadwood, then northeasterly for 1.04 miles, 25 miles per hour; then northeasterly for 0.8 mile to the intersection of U.S. Highway 14A, 20 miles per hour;

(10) U.S. Highway 85 beginning at the Wyoming state line, then northeasterly for 6.91 miles, 55 miles per hour; then northeasterly for 9.38 miles to the junction with U.S. Highway 14A at Cheyenne Crossing, 50 miles per hour;

(11) U.S. Highway 14A beginning at the junction with U.S. Highway 85 in Lead, then north for 0.36 mile, 25 miles per hour; then northeasterly for 0.24 mile, 35 miles per hour; then northeasterly for 3.13 miles, 45 miles per hour; then northeasterly to the junction of U.S. Highway 85 at the north edge of Deadwood, 25 miles per hour;

(12) Truck speed for eastbound trucks with dual tires on the driver axle on U.S. Highways 85 and 14A beginning at a point 4.3 miles east of the junction of these two highways at Cheyenne Crossing, then east for a distance of 2.32 miles to the Terry Peak Road, 35 miles per hour;

(13) Truck speed for northbound trucks with dual tires on the driver axle on U.S. Highway 385 beginning at a point 3.5 miles south of the junction with U.S. Highway 85 in Pluma, then north for a distance of 2.5 miles, 25 miles per hour;

(14) U.S. Highway 14A beginning at the junction of Colorado Street and Spearfish Canyon Road on the east side of Spearfish, then east for 1.57 miles to the south ramp terminals of Interstate 90 at Exit 14, 45 miles per hour;

(15) U.S. Highway 14 eastbound loop beginning at the south end of the bridge over Interstate 90 at Exit 10, then south for 0.92 mile, 45 miles per hour; and U.S. Highway 14 westbound loop beginning 0.92 mile south of the south end of the bridge over Interstate 90 at Exit 10, then north for 0.92 mile, 45 miles per hour;

(16) U.S. Highway 85 N beginning at the south end of the bridge over Interstate 90 at Exit 10, then north for 0.5 mile, 45 miles per hour; and U.S. Highway 85 S beginning 0.5 mile north of the south end of the bridge over Interstate 90 at Exit 10, then south for 0.5 mile, 45 miles per hour;

(17) State Highway Maintenance Route 473 beginning at the junction of U.S. Highway 14A/85 southwest of Lead, then westerly for 1.58 miles, 40 miles per hour; then westerly for 1.55 miles, 30 miles per hour.