The following table reflects State aid for development of public-use airports: Available Loans Type of Improvement Available Grant Grant Guaranty Percentage Payback Period (a) (b) (c) (d) (e) Airfield lighting 90% 10 years 90% 10 years Fueling facilities — — 100% 10 years Hangars — — 100% 10 years Land acquisition: Easements and in-fee operating equipment: 90% 20 years 90% 20 years Fire, snow removal, mowing, etc. 90% 10 years 90% 10 years Pavement: New 90% 15 years 90% 15 years Overlays 90% 10 years 90% 10 years Interest on loans provided by DOT will be 1 percent above the prime commercial rate at the time loan agreement is executed. Loan and grant obligation of the airport owner may be secured by a lien or mortgage on the improvement or existing property.