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Design and Maintenance of Stormwater Infiltration Practices


Infiltration of stormwater has become an important topic in the management of urban runoff. Many communities now require infiltration of stormwater to help reduce pollutant discharges and recharge local groundwater systems. Under Wisconsin Administrative Code NR 151.12, a percent of stormwater runoff must be infiltrated on new development and redevelopment. Prior to infiltration, pretreatment is required for parking lot runoff and for runoff from new road construction in commercial, industrial and institutional areas. Discover the planning, design, construction and maintenance of complex infiltration systems.

The following issues will be addressed: Why infiltration of urban stormwater is important to water quality; Science of soils and infiltration; Site investigations; Pretreatment of stormwater runoff; Infiltration basins; Infiltration trenches and injection wells; Vegetation to use in infiltration systems; Monitoring and maintenance


Part I

Why is infiltration of urban stormwater important
a. Impacts of stormwater runoff on groundwater recharge and stream base flow.
b. Benefits of infiltration on water quality.
c. Reasons for requirements of infiltration in Wisconsin Administrative Codes NR 216 & NR 151.

Science of soils and infiltration
a. Overview of soils
b. Infiltration theory and equations
c. Seasonal effect on Infiltration

Site investigations
a. Initial Screening
b. Soil Borings
c. Field Infiltration Rate Test Procedures and Methods
d. Soil and Site Evaluation Report

Infiltration Basin, and Trench Design
a. Pretreatment
b. Pollutant removal
c. Planning guidelines
d. Design guidelines
e. Basin Volume Calculations
f. Maintenance

Vegetation to use in infiltration systems
a. Vegetation that tolerates rapidly changing environments of infiltration systems
b. Special planting requirements
c. Maintenance needs
d. Control of exotics and weeds
e. Landscape ecology opportunities

Part II

Pretreatment of stormwater runoff
a. Need for Pretreatment
b. Pollutants of concern
c. Source controls
d. Pollutant trapping devices

Porous Pavement Design

Paver System Design and Installation

Bioretention Design

Monitoring and Maintenance
a. Monitoring and maintenance needs & why it’s important
b. Why as-builts & construction certification are important
c. How to make maintenance happen
d. Example of county web-based BMP maintenance tracking system

Cities of the Future

Group discussion and example projects

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Benefits and Learning Outcomes

  • Evaluate water quality as it relates to stormwater runoff
  • Perform site investigations and monitoring
  • Learn how to plan infiltration systems

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This program can be applied toward the:

Thu. & Fri. Sept. 24-25
Location: UWM School of Continuing Education (Click link for directions)
Instructor: Neal O'Reilly, Ph.D., PH
CEUs: 1.4/PDHs: 14
Enrollment Limit: 40
Program No. 4850-8344
Registration Deadline: Thu., Sept. 24
Register Now
For more information, contact:
Marcia Gabriel,, 414-227-3378
Murali Vedula,, 414-227-3121


Fall 2015 Water Technology Brochure

Or download the pdf