Action 1: Complete the Blue Star City stormwater management assessment and be recognized for implementing the actions therein.
In November 2010, The City of Woodbury received the Blue Star City Award, one of the first eight cities to receive the award. The program honors communities that “are taking a leadership role in protecting Minnesota’s water resources and public health through excellence in storm water management.” The city scored a 119/187 in the following categories: Planning and Preservation, Stormwater Standards and Practices and Stormwater Pollution Prevention.
Action 4: Create a stormwater utility that uses variable fees to incentivize enhanced stormwater management, minimize the volume of and pollutants in runoff, and educate property owners.
The City of Woodbury’s stormwater utility fees are set for residential (single family and townhome) parcels. Large multi-family, institutional, commercial and industrial parcels are variable based on impervious surface coverage. The city also has a stormwater area charge for developing parcels for the construction of major city infrastructure. Developments can receive credits to these charges by providing all necessary stormwater basins and infrastructure required as a result of their development. All money collected from the stormwater utility fee and stormwater area charges are used to fund stormwater projects and stormwater projects are paid for only through these funds.
Action 5: Adopt and implement guidelines for, or adopt required design standards/incentives for, at least one of the following stormwater infiltration/reuse techniques: rain gardens or green roofs, cisterns and other stormwater reuse strategies, green alleys or green parking lots (includes coal tar sealants) and/or pervious/permeable pavement or pavers.
Chapter 27 of the city code, Environmental Management, states new development should first review the following site design and BMP options before designing the stormwater system:
- Preserving natural vegetation.
- Preserving and utilizing natural upland swales, depressions and upland storage areas in the post development condition to the degree that they can convey, store, filter, and retain stormwater runoff before discharge. Preservation requires that no grading or other construction activity occurs in these areas.
- Liminating curb and gutter where practicable and using vegetated swales or equivalent.
- Minimizing parking facility size.
- Using shared parking facilities consistent with zoning requirements.
- Installing semi-permeable/permeable or porous paving.
- Maximizing open space while incorporating smaller lot sizes to conserve natural areas and reduce the amount of stormwater runoff generated at the site.
- Utilizing vegetated areas to filter sheet flow, remove sediment and other pollutants and increase time of concentration.
- Disconnecting impervious areas by allowing runoff from small impervious areas to be directed to pervious areas where it can be infiltrated or filtered.
10. Increasing buffers around streams, steep slopes, and wetlands to protect from flood damage and provide additional water quality treatment.
11. Installing green roofs.
12. Using irrigation ponds/systems, cisterns, rain barrels and related BMPs to reuse stormwater runoff.
13. Planting of trees as a stormwater BMP.
14. Utilizing a soil amendment/decompaction process after site disturbance.
The city’s design guide includes design standards for infiltration areas/rain gardens. We have also provided guidance and examples for new developments that are interested in stormwater reuse, green roofs and porous pavers by the installation of example projects on city property.
Action 6: Adopt an ordinance with erosion and sediment control provisions as well as requirements for permanent stormwater treatment.
Chapter 7, Land Disturbance and Erosion and Sediment Control Ordinance of City Code outlines the erosion and sediment control requirements for the City of Woodbury. Additional detail and guidance is included in the city’s land Disturbance Permit packet. Regular site inspections are performed by city staff on all projects with an active land disturbance permit. Chapter 27, Environmental Management, includes the city’s requirements for permanent stormwater treatment.