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.