3.d Stormwater Management – Above Green

Employ design and construction strategies that reduce stormwater runoff and discharges of polluted water offsite to protect the natural hydrology and watershed health. For any new construction per EISA section 438, use site planning, design, construction, and maintenance strategies to maintain hydrologic conditions after development, or to restore hydrologic conditions following development, to the maximum extent that is technically feasible.

Requirements:

Submit documentation demonstrating EISA stormwater management requirements have been met or exceeded.
- Required Documentation:
  - Pre-development condition;
  - EISA Section 438 estimated implementation costs for design and construction;
  - Calculation for run-off volumes and rates in 95th percentile rainfall;
  - Technical constraints;
  - Stormwater features and their location(s);
  - Construction cost;
  - Validation documentation of constructed features.

References:

Energy Independence and Security Act (EISA), Section 438

Assessment Guidance:

Stormwater management examples include:

Reduced impervious surfaces
Previous paving materials
Bio-swales
On-site filtration
Rain gardens
Green roofs
Retention ponds and rainwater collection systems