The criteria in this section relate to specific design requirements, including IFS requirements, and guidelines for designers/contractors to follow and Tyndall AFB personnel to review. Additional criteria are provided in the other sections of this Landscape Master Plan and are not repeated in this section; however, the requirements for stormwater must be coordinated with other site elements. The sections that follow serve as worksheets, with supporting guidance and illustrations, for designers/contractors to use among their teams and in coordination with Tyndall AFB. These worksheets should be used to complete the Compliance Checklist submittal for each project. Each requirement includes a selection of check boxes to indicate the applicability of that requirement to a specific context, and to demonstrate compliance with the requirements.
Yes No NA The designer/contractor either selects “Yes” if compliance has been met, “No” if it has not, or “N/A” if the requirement is not applicable to the project.
Yes No NA
SC 1. Site stormwater management plan fully integrates, to the maximum extent technically feasible (METF), traditional “hard” infrastructure elements with NNBF to reduce flooding potential, enhance water quality, comply with the antiterrorism (AT) requirements, and generally provide a more livable and sustainable environment on the base.
SC 2. Satisfy applicable requirements of UFC 3-201-01, Civil Engineering.
SC 3. Satisfy requirements of UFC 3-210-10, Low Impact Development.
SC 4. Satisfy requirements of Environmental Resource Permitting Applicant’s Handbook – Volume I.
SC 5. Satisfy requirements of Environmental Resource Permitting Applicant’s Handbook – Volume II, which provides specific sizing and design guidance for various stormwater elements.
SC 6. Employ NNBF to the METF for stormwater that use or mimic natural processes to: (1) infiltrate and recharge, (2) filter and treat, (3) evapotranspire through biological uptake, and/or (4) harvest and use precipitation near to where it falls to earth.
SC 7. Locate stormwater elements in such a way as to maximize stormwater runoff capture, align with site drainage patterns, integrate with proposed land uses, enhance safety, and ensure accessibility.
SC 8. Maximize the use of vegetated open channels and minimize the use of pipes for conveyance of stormwater runoff.
SC 9. Minimize impervious surfaces and minimize turf areas.
SC 10. Incorporate pervious pavement at overflow parking areas, walkways, plazas, and other large expanses of pavement with low traffic loads.
SC 11. Locate, design, and/or raise (that is, configure as broad and shallow) stormwater elements in accordance with FDEP requirements to comply with minimum separation of seasonal high groundwater and bottom of facility.
SC 12. Avoid stormwater treatment and storage sites in contaminant areas.
SC 13. Perform a groundwater mounding analysis to document that the design will perform as required (not required for wet detention facilities) per the requirements listed in Environmental Resource Permitting Applicant’s Handbook – Volume II.
Through the collective use of plantings, naturally occurring element, and proper planning, the site will function as a cohesive system that achieves its maximum stormwater management potential.
Exhibit C04-4 represents a stormwater management system that operates efficiently; it is intended that Tyndall AFB's environment achieve this success as described in this section.
Designers/contractors must think beyond the limits of their site and understand its context within the overall base and how individual actions may adversely impact sites downstream
Yes No NA
SC 14. Use Bioretention, Bioswale, and/or Subsurface Storage and Infiltration elements to the METF to
reduce the need for pipes for conveyance.
Within parking areas, NNBF can often be seamlessly integrated into landscaped areas along edges or within islands, as well as within no parking zones. With careful design that considers pedestrian and vehicular circulation patterns, such features will not only effectively capture and treat site runoff, but also provide increased shade, hurricane resiliency, and greater wellbeing.
In areas of Tyndall AFB with high groundwater elevations, soil depths can limit required tree soil volumes and stormwater storage areas immediately under the surface. In such conditions, stormwater elements are often most effective when configured to be broad and shallow at the surface and/or within subsurface areas under paved surfaces.
Yes No NA
SC 15. Direct roof runoff into nearby stormwater element(s) where it can be treated and infiltrated.
SC 16. To the METF, use Pervious Pavement, Subsurface Storage and Infiltration, and/or Tree Pits/Trenches.
SC 17. Break up expansive impervious pavements with vegetated stormwater elements to increase shade and filter/infiltrate stormwater.
When integrated into the landscaped pedestrian areas such as the Multi-Modal Spine, NNBF can capture and filter runoff from sidewalks and roads, thus reducing the demand on traditional stormwater conveyance elements. Such features can also greatly enhance the health and longevity of site vegetation, provide much needed shade and lower temperatures, and create more walkable pathways.
Designing effective green infrastructure elements within corridors entails careful consideration of pedestrian and vehicular accessibility and safety. Such features incorporate the following: species that will not conflict with pedestrian or vehicular circulation; more robust/reinforced curb structure when adjacent to roads; fencing or other barriers to protect trees and plants; and safe crossings over and around depressed stormwater elements.
Yes No NA
SC 18. Drain impervious surfaces onto landscape areas to the METF and in a manner that minimizes erosion.
SC 19. Use Bioswale, Enhanced Tree Pits/Trenches, Pervious Pavement walkways, and/or Stormwater Planter to the METF.
SC 20. Incorporate bump-out stormwater planters at intersections and mid-block crossings if on-street parking is present/available.
SC 21. Provide roadside drainage instead of the traditional curb and gutter with inlets and/or pipes where METF.
To improve water quality, manage flows, and decrease temperatures, open spaces shall incorporate NNBF that are integrated within urban design concepts. Designing stormwater elements within open spaces must acknowledge site context and existing conditions, realize the human scale, and balance aesthetics against green infrastructure performance. The goal is a site that incorporates and enhances surface and subsurface conditions, while creating a sense of place for users as an entire performance landscape system.
Yes No NA
SC 22. Comply with Florida Department of Environmental Protection’s technical requirements and revegetate the stormwater elements in these areas in accordance with the landscape requirement of this Landscape Master Plan.
SC 23. Maximize surface flows/expressions and minimizes the use of piped drainage conveyance.
SC 24. Design for desire paths and include components such as vegetative or physical barriers that discourage foot / bike traffic through element.