UFC 3-260-11FA
25 May 2005
c)
Ponding from a 100-year recurrence storm shall not
encroach within 25 feet of a primary runway.
d)
If additional storm water dry-bottom detention ponds
are required, they shall be located as remote from
air operational pavements as practical. Wet-bottom
storm water retention ponds are not permitted.
e)
The Contractor shall analyze the 10-year and 100-year
storm event and determine the ponding volumes, areas
and elevations and delineate the 10-year and 100-year
ponding areas on a contour plan of the airfield. If
the 100-year storm event results in ponding in excess
of criteria, storm water detention shall be provided
as necessary to meet pending criteria. Detention
shall be located away from the airfield to the extent
possible.
f)
Storm sewers shall be a minimum of [
] inches
diameter.
g)
Storm sewer pipe shall be [
] with [
]
type
of
joint sealants.
4)
Apron Drainage. Aircraft parking apron shall
have
an
interior system of inlets and storm water drains.
a)
Fuel Spill Potential Area
The storm water facilities for an apron that will
experience fueling operations shall be designed and
constructed in conformance with NFPA Standard 415.
Storm sewers shall not have bituminous coatings and
sewer joints shall be sealed with fuel resistant,
water-tight neoprene or rubber sealants. The storm
drain for a fueling apron shall be separate from
airfield drainage and convey the flow through a fuel
spill containment facility.
b)
Deicing Apron
Aprons used for deicing shall have a drain system
separate from airfield drainage that will divert the
first flush apron drainage to a deicing chemical
recycling and/or treatment facility.
c)
Aprons shall have a system of interior inlets.
d)
Aprons shall be sloped such that the maximum depth of
ponding at an inlet shall be 9 inches before sheet
flow of storm water off the apron occurs.
5)
The drainage design shall include any storm water flow that
enters the project site from contiguous areas.
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