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Is Your Association Ready for a Recession? If too much water enters the retention pond system, it can spill over along this designated path and continue to flow downstream until the excess volume of water exits the system. Alkaligrass vs. Bluegrass: Whats the difference? When water enters a retention pond, it flows over an outfall structure, which regulates how fast and in which direction it flows downstream. be used as an alternative if a permanent pool is present. Copyrights 2019 All Rights Reserved by BTL. The retention time promotes pollutant removal through sedimentation and the opportunity for biological . The best elevations for Warning: It is Required that the minimum horizontal distance between a water-supply well and the ordinary high water level of a storm water retention pond is 35 feet Warning: It is Required that CSW permittees must design basins using an impermeable liner if located within active karst terrain. Excessive use of rip-rap should be avoided to Larger retention ponds (volumes more than 25,000 m3) necessitate extensive impoundment and may be subject to additional inspection and structural restrictions. The retention ponds depth affects how much water it can hold before overflowing. gaskets (ASTM C361) should be used to create watertight joints. The pond buffer should be contiguous with other buffer areas, that are required by existing regulations (e.g., stream buffers). 150.18 Swimming Pool and Detention/Retention Pond Fence Requirements. in the forebay should occur every 5 to 7 years or after 50% of total forebay The following words, terms, phrases, when used in this section shall have the meanings ascribed to them in this section, except where the context clearly indicates a different meaning. Existing trees should Each Field Manual was developed with the consideration of essential maintenance requirements for each type of stormwater measure addressed in the corresponding Structural Stormwater Management Measures subchapters within the NJ . An aquatic bench Many of those smaller ponds are on private property. Limit pond access with fencing Fencing is required when the ponds side slopes are steep. Because they retain water for a longer time, wet ponds are also called retention ponds. Retention ponds also help gradually recharge groundwater levels by recharging the groundwater aquifer with rainwater. 101-15, passed 12-16-14), Skip to code content (skip section selection).