Illinois Valley Regional Airport, also known as Walter A. Duncan Field, is a city-owned, public-use airport located northwest of the central business district of Peru, a city in LaSalle County, Illinois, United States. The airport was opened in November 1985.Facilities and aircraftIllinois Valley Regional Airport covers an area of at an elevation of above mean sea level. It has two runways, one designated 18/36 with an asphalt surface measuring 6,000 by 100 feet (1,829 x 30 m) and a second designated 7/25 with an asphalt surface measuring 4,000 by 75 feet.For the 12-month period ending December 31, 2007, the airport had 21,000 aircraft operations, an average of 57 per day: 98% general aviation, 1% air taxi and 1% military. At that time, there were 33 aircraft based at this airport: 85% single-engine, 12% multi-engine and 3% helicopter.
