13 July 2006
STORM WATER MANAGEMENT
Develop a storm water management system using 10-year storm frequency
methodology and local requirements. Low Impact Development (LID) principles for
storm water management, such as decentralized storm water retention, should be used
in the land development process to conserve and protect natural resource systems and
reduce infrastructure costs. Note: Consider children's safety in design and construction
of storm water structures.
Note: UFC 3-220-10, Low Impact Development, provides additional information for
applying these strategies to projects.
Storm Water Runoff.
Areas should be designed for positive drainage away from housing units. Finish grade
around perimeter of each housing unit should slope a minimum of 5% (15 cm (6 in) fall
in 3.0 m (10 ft)) to carry surface water away from foundation walls. Where lot lines,
walls, slopes, or other physical barriers prohibit 15 cm (6 in) fall in 3.0 m (10 ft), drains
or swales should be provided to ensure drainage away from structure.
Drains should be provided in accordance with IRC or IBC.
Meters and Meter Bases.
Meter bases should be provided to facilitate installation of individual gas and electric
meters at a later date. Provide visual screening for meters and meter bases, and do not
locate meters adjacent to unit entrances.
Co-location of Utilities.
Where feasible, and acceptable to local utility supplier or servicing agency, use common
trenches for two or more utilities and applicable underground utility marking protocol.
Protect all ferrous materials in underground utility systems from corrosion as
appropriate and required by local conditions.