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Boating regulations for the Iowa Great Lakes can be found in Iowa Department of Natural Resources publication   “The Handbook of Iowa Boating Laws and Responsibilities” CLICK HERE 

or DNR Boating Education website

Iowa Boating Navigation Laws - Iowa Code Section 462A  CLICK HERE

Boat Nighttime Speed Limit Approved For Dickinson County

On March 9, 2006 the DNR Natural Resource Commission approved the boat nighttime speed limit

TOPIC Final Rule—Chapter 40, Boating Speed & Distance Zoning

The Commission amends Chapter 40, “Boating Speed & Distance Zoning” Iowa Administrative Code. ..................

The department was petitioned by the East Okoboji Lakes Improvement Corporation to establish a one-half hour after sunset to sunrise speed limit for vessels operating on all lakes in Dickinson County. Notice of Intended Action was published in the Iowa Administrative Bulletin on January 4, 2006, as ARC4794B. ................

Comments were received during the comment period for the nighttime speed limit on all lakes in Dickinson County electronically; by mail; and verbally at the public hearings held in the Wallace Building and locally at Arnolds Park. The majority of the comments were in agreement that a nighttime speed limit should be established. No changes have been made from the Notice of Intended Action. No changes have been made from the Notice of Intended Action.

Pursuant to the authority of Iowa Code subsection 455A.5(6), the Natural Resources Commission adopts amendments to Chapter 40, "Boating Speed and Distance Zoning," Iowa Administrative Code. 

The following amendment became effective May 3, 2006:

Amend 571—Chapter 40 by adopting the following new rules:

571--40.52(462A) Nighttime Speed Limit, Dickinson County. No vessels, except authorized emergency vessels, shall be operated at speeds greater than twenty five miles per hour at any time between the hours of one-half hour after sunset and sunrise on all lakes located in Dickinson County.

Des Moines Register Articles On The Boat Nighttime Speed Limit

  • DNR Proposes 25 mph Night Limit on Lakes - December 3, 2005  CLICK HERE


  • Proposed Limit On Boat Speed Draws Support - January 25, 2006  CLICK HERE

Additional information on boating regulations can be obtained from the Iowa DNR Law Enforcement Bureau, Northwest Iowa District #1 at Spirit Lake -  telephone 712/ 336-1840.


Iowa Great Lakes Water Safety Council PO Box 232 Spirit Lake, IA 51360