Ill. Admin. Code tit. 92, § 16.80 - Approach Surface
An approach surface is longitudinally centered on the extended
a) The inner edge of the approach surface is
the same width as the primary surface and it expands uniformly to a width of:
1) 800 feet (Departmental
standard);
2) 1,250 feet for that
end of a utility runway with only visual approaches;
3) 1,500 feet for that end of a runway other
than a utility runway with only visual approaches;
4) 2,000 feet for that end of a utility
runway with a non-precision instrument approach;
5) 3,500 feet for that end of a non-precision
instrument runway , other than utility, having visibility minimums greater than
three-fourths of a statute mile;
6)
4,000 feet for that end of a non-precision instrument runway , other than
utility, having a non-precision instrument approach with visibility minimums as
low as three-fourths of a statute mile; and
7) 16,000 feet for precision instrument
approach runways.
b) The
approach surface extends for a horizontal distance of:
1) 3,000 feet at a slope of 20 feet
horizontally for each foot vertically (Departmental standard);
2) 5,000 feet at a slope of 20 feet
horizontally for each foot vertically for all utility and visual
runways;
3) 10,000 feet at a slope
of 34 feet horizontally for each foot vertically for all non-precision
instrument approach runways other than utility; and
4) 10,000 feet at a slope of 50 feet
horizontally for each foot vertically with an additional 40,000 feet at a slope
of 40 feet horizontally for each foot vertically for all precision instrument
approach runways.
c) The
outer width of an approach surface to an end of a runway will be that width
prescribed in this Section
16.80 for the
most precise approach, existing or planned, for that runway end.
Notes
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