Any owner of a parcel in the Village with a stormwater facility on said parcel has an incumbent duty to ensure the functionality of the stormwater facility is as intended at all times. The Bloomingdale Amendments to the Stormwater Ordinance hereby adopt maintenance provisions for stormwater facilities on any parcel in the Village. Section 15-55 of the Stormwater Ordinance, Long-Term Access for Maintenance and Inspections is amended to add the following provisions:
A. Detention/Retention Basin Maintenance: Owners of any parcel with a stormwater storage detention basin or stormwater storage retention basin shall perform periodic maintenance to ensure the basin is functioning at all times as intended. Such required periodic maintenance and inspections shall address and include:
1. Algae Control: Any owner of a parcel containing a retention basin shall have a plan for managing and controlling algae or other noxious or offensive aquatic vegetation. The plan can include chemical treatment, aeration/fountain mechanical methods, or combination thereof. The owner is responsible for obtaining all necessary permits and compliance with all regulations for algae control.
2. Erosion: Any owner of a parcel containing a stormwater facility shall maintain stable ground surfaces to minimize soil erosion. Degraded surfaces, washouts, landslides, or other forms of erosion shall be permanently stabilized and repaired by the owner to prevent further erosion or reduction in water quality.
3. Influent pipe system consists of that part of the drainage system that collects runoff from the ground surface and conveys the storm water to a storm water detention or retention basin, or other downstream pipe system. The influent pipe system must be inspected on at least an annual basis or more frequently if necessary to check and verify proper operation. Inlet, catchbasin and manhole grates must be kept free of debris to permit water to enter the storm sewer system. Catchbasins collect and retain solid debris and should be cleaned on an annual basis, or at such frequency as needed based on the accumulation rate of debris collected. The storm pipe system must be kept in proper working condition, with pipe joint sections remaining soil tight. Open joints or disjointed pipes should be repaired to prevent sink holes. Said sink holes or other defects that allow for root intrusion, substances or materials other than water to enter the system must be repaired.
4. Nuisance Wildlife: Any owner of a parcel containing a stormwater facility shall be responsible for controlling nuisance wildlife that can affect the performance or operation of the stormwater facility. Nuisance wildlife can affect stormwater systems by blocking the flow of water, damaging or destroying vegetation, affecting ground stabilization that results in erosion, degrading or contributing to poor water quality, elevate water levels above intended design level, or raise coliform levels in water. Such nuisance wildlife includes but is not limited to beavers, raccoons, skunks, possums, ducks, geese, groundhogs, hedgehogs, and otters.
5. Outlet Control: A detention/retention basin includes outlet control (restrictor), structure housing the restrictor and storm sewer piping that controls the rate of flow out of the detention or retention basin and conveys the runoff downstream. The outlet control (restrictor) must be periodically checked for proper functionality. Weekly inspection of the restrictor is recommended to ensure that debris does not accumulate at the outlet control which could affect proper operation of the basin drainage. Storm sewer pipes or other conveyance system downstream of the outlet control should be checked to maintain proper functionality. Storm sewers or swales should be kept free of debris and cleaned as necessary to allow free flow of water.
6. Silt And Sediment Removal: Any owner of a parcel containing a stormwater facility shall be responsible for removing any silt, sediment or other debris which accumulates in a detention or retention basin. Frequency of said maintenance shall be as needed to maintain the required storage volume and water quality. Dredging of the basin, when necessary, shall be performed by the owner to remove and dispose of long-term silt, sediment and debris build-up.
7. Storage Volume: The basin storage volume shall not be filled or otherwise altered without prior written authorization from the Village Engineer.
8. Vegetation: The detention basin bottom, and detention and retention basin embankments shall be free of bare, exposed ground that is devoid of a manicured, vegetated crop cover. In highly visible areas, the vegetation should be mowed turf-grass, unless otherwise shown on approved drawings or stormwater submittal to have a native vegetation plant cover or other landscape elements. Invasive species are unsightly, and can result in operational or maintenance difficulties with storage basins and must be controlled or managed to prevent their spread in the basin or to surrounding areas or parcels. The vegetated plant cover should control the growth of weeds to the greatest extent possible.
B. Management Of Runoff On Residential Properties: All properties with residential zoning, or residential in character, shall conform to the following sections for managing runoff.
1. Controlling Runoff Onto Sidewalks Or Streets: The owner of any parcel is responsible for directing and controlling runoff from downspouts and sump pumps. Such runoff shall not result in a concentrated flow of water onto a public sidewalk or into a public street in such a manner that causes hazard to the paved surface, including but not limited to icing, stagnant or ponding water, algae growth, slippery or slick surfaces. Such flow from downspouts or sump pumps shall not be unnaturally concentrated and drained onto surrounding parcels including the public sidewalks or streets.
2. Downspouts And Sump Pumps: The location and direction of the discharge of any sump pump, downspout or other piped discharge from parcel must be directed in such a manner that minimizes adverse impacts to surrounding properties. Drainage discharge for sump pump and downspouts should follow the Village Private Stormwater Discharge for Sump Pumps and Downspouts guidance, as amended from time to time by the Village Engineer. Unless permitted by the Village Engineer, downspouts and sump pumps should not be directed into any side yard resulting in a nuisance on the parcel or any surrounding parcel. Downspouts and sump pumps should not be extended in any manner that creates a nuisance or adversely impacts surrounding parcels, including the downstream sidewalks or roadway. Unless otherwise permitted by the Village Engineer in writing, all piped discharge from downspouts or sump pumps shall be either above or below grade and should drain on the surface of and across a minimum of twenty feet (20') of pervious ground surface prior to leaving the site or shall otherwise be mitigated.
3. Drainage And Grading: The grading on a parcel shall conform to the original subdivision grading and drainage plan to the greatest extent practical. No grading changes resulting in drainage modifications on any parcel that affect any surrounding parcel, or upstream or downstream parcel shall not be altered in any way by any person without prior written authorization from the Village Engineer.
4. General Drainage Regulations: Runoff across the ground surface flows naturally from the higher property, known as the dominant parcel, to a lower parcel, known as the servient parcel. The dominant parcel has an inherent advantage over the servient parcel based on the topography of the ground. The dominant parcel can drain runoff onto the servient parcel provided that, in the opinion of the Village Engineer, the runoff is not collected and concentrated unnaturally, or generated by mechanical means, or unreasonably accelerated to the servient parcel. The servient parcel must allow the runoff from the dominant parcel to enter the servient parcel and the servient parcel cannot block or prevent the natural flow of water from the dominant parcel. The servient parcel is responsible for conveying the runoff from the dominant parcel across the lower ground. (Ord. 2019-25, 7-22-2019)