HYDROLOGY / DRAINAGE CONTROL

The assessment and management of stormwater runoff has become a key aspect of most types of development in recognition of the potential environment, social and economic impacts of improper stormwater management on new and existing developments and upon the downstream environment.

Henderson Paddon staff includes experienced hydrologic modelers using state-of-the-art equipment and a full range of computer software. Programs such as OTTHYMO, MIDUSS and HEC-2 are run on advance in-house micro computer systems to determine pre and post development conditions, and to design stormwater management facilities to mitigate the effects of development. Recent trends in land development require the use of comprehensive stormwater management techniques and environmental designs to follow ecological principles to protect water quality and preserve and enhance fish habitat.

Henderson Paddon also provides assessment and management of stormwater runoff and floodplain mapping for private developments, as well as large and small municipalities and government agencies.

Drainage Plans Master drainage plans Stormwater management plans Municipal drainage recommendations Plans for large commercial developments
	Floodplain Mapping Subdivision developments Watershed Hydraulic and Hydrologic Reports Bridge and culvert hydraulic design Channel, spillway and dam designs
Runoff Quality Control Stormwater control ponds for retention & sediment control Municipal and industrial landfill sites Erosion control measures