250 R.I. Code R. 250-RICR-150-10-8.7

Current through November 21, 2024

Section 250-RICR-150-10-8.7 - Minimum Standard 1: Low Impact Development (LID) Site Planning and Design Strategies

A. LID site planning and design strategies must be used to the maximum extent practicable in order to reduce the generation of the water runoff volume for both new and redevelopment projects.

B. Applicants need to document that the full list of approved LID methods and/or procedures were explored at the site and need to supply a specific rationale in the event LID strategies are rejected as infeasible. The site planning process must be documented and include how the proposed project will meet the following measures and/or methods to:

1. Protect as much undisturbed open space as possible to maintain pre-development hydrology and allow precipitation to naturally infiltrate into the ground;

2. Maximize the protection of natural drainage areas, streams, surface waters, wetlands, and other regulated areas;

3. Minimize land disturbance, including clearing and grading, and avoid areas susceptible to erosion and sediment loss;

4. Minimize soil compaction and restore soils compacted as a result of construction activities or prior development;

5. Provide low-maintenance, native vegetation that encourages retention and minimizes the use of lawns, fertilizers, and pesticides;

6. Minimize impervious surfaces;

7. Minimize the decrease in the "time of concentration" from pre-construction to post construction, where "time of concentration" means the time it takes for runoff to travel from the hydraulically most distant point of the drainage area to the point of interest within a watershed;

8. Infiltrate precipitation as close as possible to the point it reaches the ground using vegetated conveyance and treatment systems;

9. Break up or disconnect the flow of runoff over impervious surfaces; and

10. Provide source controls to prevent or minimize the use or exposure of pollutants into stormwater runoff at the site in order to prevent or minimize the release of those pollutants into stormwater runoff.

250 R.I. Code R. 250-RICR-150-10-8.7

Amended effective 11/13/2018