Iowa DOT News

Aerial seeding and fertilizing set to begin along Iowa's highways

AMES, Iowa – Feb. 24, 2012 – Aviation contractors hired by the Iowa Department of Transportation (DOT) will be performing aerial seeding and fertilizing along the state's highways as soon as weather permits.

This method of roadside erosion control has been used by the Iowa DOT for many years because of its cost-saving benefits, ability to cover vast areas and success rate. Seed is best applied in the late winter months so that it will germinate in the spring.

The following aerial seeding projects should be completed in March.

  • Lee County, U.S. 61 – Fort Madison bypass from just south of Iowa 2 to Lee County Road J-50
  • Tama County, U.S. 30 – from just east of the Meskwaki Casino to M Avenue

Persons in the vicinity of these projects can expect to see the following.

  • Flights are conducted during calm periods with winds 10 mph or less, and other suitable weather conditions.
  • Ground crews supporting the airplanes will be in motor vehicles with amber lights parked along the roadside at the start and finish of each project area. These vehicles provide a visual, land-based marker to denote the boundaries of the project.
  • Seed and fertilizer products will be broadcast over the roadsides from the planes. The seed is tan-colored and lightweight. The fertilizer is white and in a granular form.
  • Operations may continue throughout the daylight hours, if conditions permit.
  • Temporary road signs will be posted in the project areas denoting aerial flights are underway.
  • Iowa DOT inspectors in state vehicles will be in the area during application.
  • Various small aircraft may be used. The most common model is an Ag-Cat turboprop biplane, typically painted yellow. These planes are equipped with hoppers to disperse the materials and normally carry only the pilot.
  • Planes fly 30 to 100 feet above the ground, and travel at speeds ranging from 60 to 100 mph.
  • Aircraft will make several passes over the same area during the application process. The planes will take off and land periodically to load materials. Their landing sites may include local airports, area landing strips, and county roads and state highways with low traffic volumes. Ground crews, including flaggers, will provide traffic control during the landings and takeoffs. The planes will be on the ground for only brief periods.


For more information on the Iowa DOT's statewide aerial erosion control projects, contact Mark Masteller at 515-239-1424 or [email protected].



©  Iowa Department of Transportation.  All rights reserved.