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D DEVELOPMENT S SERVICES D DRAINAGE W WORKSHEET Land development increases the ratio of impermeable to permeable surface area of a site due to an increase in surfaces such as roofs, driveways and

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How to fill out impervious surface ratio isr

01

Measure the total area of impervious surfaces on the property, such as driveways, roofs, and sidewalks.

02

Measure the total area of the property.

03

Divide the total area of impervious surfaces by the total area of the property to calculate the impervious surface ratio ISR.

Who needs impervious surface ratio isr?

01

Urban planners and city officials use impervious surface ratio ISR to assess the amount of paved or built surfaces in a given area.

02

Developers and architects may also need to calculate impervious surface ratio ISR to ensure compliance with local zoning regulations.

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What is impervious surface ratio isr?

Impervious Surface Ratio (ISR) is a measure of the percentage of a property's surface area that is covered by structures such as buildings, roads, parking lots, and other solid surfaces that do not allow water to penetrate.

Who is required to file impervious surface ratio isr?

Property owners or managers are typically required to file Impervious Surface Ratio (ISR) to local government authorities.

How to fill out impervious surface ratio isr?

To fill out Impervious Surface Ratio (ISR), property owners or managers must calculate the total impervious surface area on the property and report it to the appropriate local government authority.

What is the purpose of impervious surface ratio isr?

The purpose of Impervious Surface Ratio (ISR) is to help local governments manage stormwater runoff and minimize flooding and water pollution caused by excessive impervious surfaces.

What information must be reported on impervious surface ratio isr?

Information such as the total impervious surface area, property address, property owner or manager contact information, and any relevant supporting documentation must be reported on Impervious Surface Ratio (ISR).

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