SPECIAL REPORT
LEEDuser expert
Trista Little
LEED AP O+M, BD+C, Fitwel Ambassador
WSP USA
Project Director
SPECIAL REPORT
LEEDuser’s viewpoint
Frank advice from LEED experts
LEED is changing all the time, and every project is unique. Even seasoned professionals can miss a critical detail and lose a credit or even a prerequisite at the last minute. Our expert advice guides our LEEDuser Premium members and saves you valuable time.
Credit language
© Copyright U.S. Green Building Council, Inc. All rights reserved.
Intent
To reduce runoff volume and improve water quality by replicating the natural hydrology and water balance of the site, based on historical conditions and undeveloped ecosystems in the region.
Requirements
Use low-impact development (LID) practices to infiltrate, evapotranspirate, collect and reuse water onsite from 25% of the impervious surfaces for the 95th percentile storm event.
Establish and implement an annual inspection and maintenance program of all rainwater management facilities to assure continued performance.
Document the annual inspections, including identification of areas of erosion, maintenance needs, and repairs. Perform necessary maintenance, repairs, or stabilization within 60 days of inspection.
See all forum discussions about this credit »What does it cost?
Cost estimates for this credit
On each BD+C v4 credit, LEEDuser offers the wisdom of a team of architects, engineers, cost estimators, and LEED experts with hundreds of LEED projects between then. They analyzed the sustainable design strategies associated with each LEED credit, but also to assign actual costs to those strategies.
Our tab contains overall cost guidance, notes on what “soft costs” to expect, and a strategy-by-strategy breakdown of what to consider and what it might cost, in percentage premiums, actual costs, or both.
This information is also available in a full PDF download in The Cost of LEED v4 report.
Learn more about The Cost of LEED v4 »Frequently asked questions
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Where can I find long-term rainfall data? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
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Are there any specific tools or computer programs that are recommended for calculating runoff volume? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
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What are some low-impact development (LID) and green infrastructure (GI) strategies? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
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Where can I find example calculations? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
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What about rainwater runoff from greenfield areas in my LEED project boundary? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
Documentation toolkit
The motherlode of cheat sheets
LEEDuser’s Documentation Toolkit is loaded with calculators to help assess credit compliance, tracking spreadsheets for materials, sample templates to help guide your narratives and LEED Online submissions, and examples of actual submissions from certified LEED projects for you to check your work against. To get your plaque, start with the right toolkit.
Get the inside scoop
Our editors have written a detailed analysis of nearly every LEED credit, and LEEDuser premium members get full access. We’ll tell you whether the credit is easy to accomplish or better left alone, and we provide insider tips on how to document it successfully.
© Copyright U.S. Green Building Council, Inc. All rights reserved.
Intent
To reduce runoff volume and improve water quality by replicating the natural hydrology and water balance of the site, based on historical conditions and undeveloped ecosystems in the region.
Requirements
Use low-impact development (LID) practices to infiltrate, evapotranspirate, collect and reuse water onsite from 25% of the impervious surfaces for the 95th percentile storm event.
Establish and implement an annual inspection and maintenance program of all rainwater management facilities to assure continued performance.
Document the annual inspections, including identification of areas of erosion, maintenance needs, and repairs. Perform necessary maintenance, repairs, or stabilization within 60 days of inspection.
In the end, LEED is all about documentation. LEEDuser’s Documentation Toolkit, for premium members only, saves you time and helps you avoid mistakes with:
- Calculators to help assess credit compliance.
- Tracking spreadsheets for materials purchases.
- Spreadsheets and forms to give to subs and other team members.
- Guidance documents on arcane LEED issues.
- Sample templates to help guide your narratives and LEED Online submissions.
- Examples of actual submissions from certified LEED projects.
|
Where can I find long-term rainfall data? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
|
Are there any specific tools or computer programs that are recommended for calculating runoff volume? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
|
What are some low-impact development (LID) and green infrastructure (GI) strategies? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
|
Where can I find example calculations? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
|
What about rainwater runoff from greenfield areas in my LEED project boundary? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
LEEDuser expert
Trista Little
LEED AP O+M, BD+C, Fitwel Ambassador
WSP USA
Project Director
