Sedimentation Diversion, Silt Retention, Catch Basin Network Systems (916) 630-7665 Drainage

An overview of Storm Water Drainage System’s

Storm Water Management:

Storm Water management involves the functions associated with planning, designing, constructing, maintaining, financing and regulating facilities (both constructed and natural) that collect, store, control and/or convey storm water.

Storm Water Facilities:

Storm water facilities are systems such as watercourses, constructed channels, storm drains, culverts, and detention/retention facilities that are used for the conveyance and/or storage of storm water runoff.

Storm Water System:

The storm water system will involve the entire assemblage of storm water facilities located within a watershed.

Storm Water and Flood Control System:

Storm Water and Flood Control Systems required an advanced knowledge in the design, engineering, preparations, implementation and construction protocols for dealing with the Best Management Practices (BMP) that involve the hydrology of Watershed yield.
In determining the yield of the watershed area many contribution to peak flows can involve;

  • Topography

  • Creeks

  • Streams

  • Rivers

When making determinations for water volumes they are usually measured in Cubic Feet Per Second (CFS) when dealing will accumulating flows and Storm water discharge can be measured in gallons per minute (GPS).

 Urban Runoff:

The storm water that originates from urban areas, tends to contain heavy concentrations of pollutants from vehicles and industry.


In some storm water, contamination affecting water quality can contain excessive levels of phosphorous, nitrogen, and nutrients in the water, which leads to a decrease in oxygen levels. Often characterized by excessive growth of algae and aquatic vegetation, which often results in deteriorated water quality and beach closings.

National Pollutant Discharge Elimination System (NPDES):

NPDES is the name of the surface water quality program authorized by Congress as part of the 1987 Clean Water Act. This is EPA’s program to control the discharge of pollutants to waters of the United States.

Permit Issuing Authority (Permitting Authority):

Depending upon the influencing magnitude of a storm water system and the potential for down stream impacts, your local, state agency or EPA regional office may have issues with proposing such a collection / diversion system. This may require environmental permits in order to critique and regulate the facilities due to influences on Wetlands, Aquifers, Riparian areas that may pertain to, rivers/streams and their banks.


Some mitigation methods such as phyto-filtration measures can use plants and trees to filter impurities or excessive levels of nutrient from water may be mandated as remedy as an aid to cleaning up contaminated storm water.


A bioretention area is another practice to improve water quality that utilizes landscaping and soils to treat urban storm water runoff by collecting it in shallow depressions. It then filters the runoff through a fabricated planting soil media.

Ecosystem influences, retention basins capacities, discharge, suspended sediment of surface water, head wall structural considerations, flow channel capacities…..can all be part of providing properly designed storm drain systems.

The design flow rates (CFS) must consider the historical weather patterns together with the influencing topography. Anticipating and preparing for the accumulative affects are how potential consequences can be averted.

Plunge Pool:

In some cases a plunge pool basin may be utilized in order to slow the flowing water down. The pool may be protected from erosion by various lining materials and possible some of the previously mentioned practices.

In closing…

We hope this orientation narrative will be helpful in your selection of a capable performer. It is important to make sure each contender for your work possess the contracting licensing classifications that will assuredly afford you with a high level of experienced knowledge. Working with those who are most familiarity with everything from the CASQA Signage requirements to the very important disciplines of proper engineering, will provide a valued conclusion to a well planned direction.

If we can be of assistance please give us a call at:

Sincerely Yours,

Michael Chaffee

(800) 766-5259


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