Appendix L
Maintenance Level Guidelines
BIO SWALE AREA MANAGEMENT The overall maintenance practices of bio swales are very similar to that of natural areas with the following exceptions: PART 1 - PLANTING A. Optimum Seeding time: Refer to Natural Area Natural Area Establishment and Management. B. Seedbed Preparation: Tilling will generally need to be avoided due to the wet conditions that are present in a bio swale. Drilling the seed is the preferred method of planting if using a seed mix. Seed mixes will be determined by the Naperville Park District Planning Department (current standards are seed mixes from Cardno that allow enough variety for a diverse species germination). There will be minor variations based on hydrology and if the bio swale is considered a dry bottom basin. Drilling in plugs and avoiding the use of seed is also a viable option with plant species also being dictated by current knowledge from the Naperville Park District Planning Department.
C. Sowing the Seed: Refer to Natural Area Establishment and Management.
D. Establishment:
Years 1 and 2: Refer to Natural Area Establishment and Management.
Year 3. Begin Prescribed Burns
Prescribed burns will be done in a manner that is consistent with Natural Area Management practices. The exception is in areas that maintain a hydrology level that precludes burning due to their intended purposed as a swale. If burns are not able to be performed, additional mowing or spot spraying of herbicides will need to be performed in accordance with best practices in the Natural Area Management Guide. PART 2 – INVASIVE REMOVAL Refer to Natural Area Establishment and Management taking care to note that bio swales are more likely to maintain standing water or saturated soils. PART 3 – EXECUTION Refer to the Natural Area Establishment and Management.
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Naperville Park District | 2023 MASTER PLAN
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