Civil: Storm Water

An increase in storm water runoff is generally attributed to an increase in development. Impervious structures (surfaces that do not absorb storm water, such as concrete, asphalt, rooftops, and compacted gravel), allow for an increased volume and rate of storm water runoff, increased pollutant loading, and reduced amounts of water filtering into the soil. This in turn causes erosion, sediment buildup, water quality issues, increased flooding, and other ecological impacts.

Federal, State and local statutes and ordinances set several Storm Water Management guidelines that must be followed on any developed land. For example, post-development peak storm water flow cannot be higher than pre-development peak flow, and only limited amounts of sediment may transfer onto abutting properties. Also, in most cases, there are rules regarding the content of storm water that leaves a property.

CES regularly attends the monthly meetings of the Bangor Area Storm Water Group where we represent many of our Municipal Storm Sewer Systems (MS4s) clients. This group was formed to facilitate the exchange of information between regulated MS4s in the region and to promote discussion of storm water issues.

CES is able to provide the following Storm Water Management services:

• Storm Water Treatment & Conveyance Systems
• Sewer/Storm Water Separation
• EPA Storm Water Discharge Permitting
• MDEP Water Permitting
• Watershed Studies, Plans
• Stormwater Drainage Studies
• Combined Sewer Studies
• Flood Control
• NPDES Permit Applications & Programs
• Storm Sewer Design & Rehabilitation
• Topographic, Boundary, & Utility Surveys
• Site Development & Planning
• Review, Design of Subdivision Plans
• Annual Reports
• Projects of Storm Water Runoff for Future Development
• Outfall Mapping & Inspections
• Development of Databases (Annual Reporting, Outfall & Infrastructure Inspections, Construction Project Inspections)
• Utilization of MDEP Recommended ASIST© Software Application Suite
• Representation for MS4s
• Quality Control & Assurance Services for Construction of Storm Water Management Systems