Spring Load Restrictions

It is the Department's position to not implement Spring Load Restrictions any earlier than necessary. The Department monitors the daily high/low temperatures at numerous locations throughout the state. The high/low temperatures are used to calculate accumulated freeze and thaw indexes. Please be aware that this method is only one decision tool the Department uses to determine when to implement and remove load restrictions. The Department still relies heavily on the existing highway conditions and past experience of its field personnel when making the final decision of when to implement and remove load restrictions.

Under the authority of SDCL 32-22-24, a Highway Maintaining Authority may restrict loads on their highways anytime during the period from February 15 to April 30. The purpose of the load restrictions is to protect the highways from break-up during the spring thaw.

County road posted load limits are not determined or enforced by the State. Please use the information below to contact the county for questions/concerns on county road load limits. 
Under the authority of SDCL 32-22-24, a highway maintaining authority may limit weights on highways anytime during the period from February 15 to April 30. The purpose of these load limits is to protect the highways from break-up during spring thaw. The linked map above shows the proposed 2021 State Highway Spring Load Limits. These limits are subject to change as conditions warrant. Actual load limit posting takes precedence over those listed here and are in effect only when the load limit signing is in place. 

2021

Current Spring Load Limits Map PDF          
Effective Date Highway Location Begin/End MRM Length Posting Region Removed Effective Date
March 1, 2021 SD 48 I-29 to Iowa Border 371.89 to 384.24 12.3 8 Tons/Axle Mitchell Removed Effective: March 29, 2021
March 1, 2021 SD 11 SD 11 to Alcestor 23.46 to 34.5 11.0 8 Tons/Axle Mitchell  Removed Effective: March 23, 2021
March 1, 2021 SD 25 SD 38 to SD 34 61.72 to 82.83 21.1 6 Tons/Axle Mitchell  Removed Effective: April 9, 2021
March 1, 2021 SD 19 SD 44 to SD 42 54.17 to 64.49 10.3 7 Tons/Axle Mitchell Removed Effective: March 29, 2021
March 1, 2021 SD 19 SD 42 to I-90 65.50 to 72.47 6.9 7 Tons/Axle Mitchell Removed Effective: March 29, 2021
March 1, 2021 US 81 SD 34 at Madison to US 14 94.77 to 116.72 21.6 7 Tons/Axle Mitchell Removed Effective: April 6, 2021 
March 1, 2021 SD 26 From Hwy 47 to Hwy 45 230.12 to 252.85 22.73 6 Tons/Axle Aberdeen  Removed Effective: April 6, 2021 
March 1, 2021 SD 26 From Hwy 45 to Hand/Spink Co Line 253.85 to 267.77 13.92 6 Tons/Axle Aberdeen   Removed Effective: April 6, 2021
March 1, 2021 SD 45 From US 212 to US 14 137.72 to 112.37 25.35 8 Tons/Axle Aberdeen   Removed Effective: April 6, 2021
March 1, 2021 SD 20 Jct. US 85 South to Bison 29.31 to 83.00 53.69 8 Tons/Axle Rapid City Removed Effective: March 31, 2021
March 1, 2021 SD 79 Newell to Jct. SD 20 West of Reva 133.12 to 199.32 66.2 8 Tons/Axle Rapid City Removed Effective: March 31, 2021
March 1, 2021 SD 1806 Jct. SD273 north to US83 138.45 to 180.05 41.6 6 Tons/Axle Pierre  Removed Effective: March 22, 2021
March 1, 2021 SD 1806 Intersection west of the dam to Mission Ridge 191.61 to 221.05 29.4 7 Tons/Axle Pierre  Removed Effective: March 22, 2021
March 1, 2021 SD 1804 Hughes/Sully County line to US212 266.35 to 303.3 37.0 7 Tons/Axle Pierre  Removed Effective: March 22, 2021
March 1, 2021 SD 1804 US212 north 4.3 miles 307.66 to 311.97 4.3 7 Tons/Axle Pierre  Removed Effective: March 22, 2021
March 1, 2021 SD 1804 Fm SD 44 to Platte Creek 112.13 to 120.16 8.0 6 Tons/Axle Mitchell  Removed Effective: April 6, 2021
March 1, 2021 SD 1806 US 18 North to Whetstone 15.68 to 25.75 10.0 6 Tons/Axle Mitchell  Removed Effective: April 6, 2021
March 1, 2021 SD 1806  SD 44 to Lucas Corner 42.78 to 48.55 5.9  6 Tons/Axle Mitchell  Removed Effective: April 6, 2021
March 1, 2021 SD 251 Nebraska State Line to US 18 0.00 to 15.84 15.8 6 Tons/Axle Mitchell  Removed Effective: April 6, 2021
March 1, 2021 SD 47 From ½ mile North of SD10 to North Dakota State Line 248.79 to 260.38 11.6 6 Tons/Axle Pierre  Removed Effective: April 6, 2021
March 1, 2021 SD 63 US 212 to SD 20 173.67 to 204.91 31.2 6 Tons/Axle Pierre  Removed Effective: April 6, 2021
March 5, 2021 US 16A Custer State Park east gate to SD 244 26.25 to 55.76 29.6 7 Tons/Axle Rapid City Removed Effective: April 12, 2021
March 5, 2021 SD 36 US 16A to SD 79 36.00 to 45.01 9.0 7 Tons/Axle Rapid City Removed Effective: April 12, 2021 
March 5, 2021 SD 40 Hayward to Cheyenne River 38.26 to 69.00 30.7 7 Tons/Axle Rapid City Removed Effective: March 23, 2021
March 5, 2021 SD 87 Wind Cave Nat’l Park to US 16/385 47.27 to 79.36 30.8 7 Tons/Axle Rapid City Removed Effective: April 12, 2021
March 5, 2021 SD 89 US 16A to SD 87 58.51 to 64.58 6.0 7 Tons/Axle Rapid City Removed Effective: April 12, 2021
March 9, 2021 SD 28 US 281 to SD 37 near Hitchcok  269.97 to 283.99  14 7 Tons/Axle not to exceed 80,000 GVW Aberdeen  Removed Effective: May 5, 2021
March 15, 2021 SD 47 From US12 to SD20 west of Hoven 203.62 to 217.63 14 6 Tons/Axle Pierre  Removed Effective: April 6, 2021

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