Agenda Packets - 2021/07/06 - Laserfiche WebLink

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the maintenance obligations for Best Management Practices (BMPs), such as stormwater basins, used to meet the permit requirements. The City will also provide documentation on how these BMPs will be maintained. vii. Permit applications that trigger the need for an easement in the District's favor, such as those along the public drainage system, will be recognized early in the review process by the City and directed to the District to ensure that the appropriate easement is obtained. b. Permit Closeout Procedure i. As part of the final close-out procedures, the City will require as -built plans or some verification that the BMP meets the approved plans and is functioning as designed. As-builts will verify the required treatment volume, emergency overflow elevations, inlet/outlet/sump elevations, drain tile elevations, surface contours, etc. ii. The City will require and ensure inspection of a 48- or 72-hour drawdown of all infiltration and filtration features. This will be completed by City contracted personnel. iii. The City will provide documentation showing all permit stipulations have been met. Stipulations typically include an as -built survey of stormwater features, quantification of floodplain or wetlands impact and mitigation areas, etc. iv. The City will require establishment of 70% vegetative cover prior to permit closure. Once established, all sediment and erosion control measures must be removed. 2. Hydrologic/Hydraulic Data Transmittal a. The City will provide the items listed below at the District's request. i. Submittals of GIS shape files with the location of the permits. ii. Submittal of Rule F, Wetland Alteration, digital file requirements, which include: 1. A GIS shapefile of all delineated boundaries. 2. For on -site replacement wetland and buffer areas, a GIS or CADD file documenting sign locations. iii. The District regularly updates a District Wide Model and requests the transmittal of any hydrologic and hydraulic data for permitted projects that may pertain to it. This may include things like altering drainage patterns, replacing culverts, etc. Most likely this is only relevant for RCWD Rule C as the District will retain permit authority for culvert structures under Rule G, Crossings of Natural & Artificial Conveyance Systems and Rules I, Drainage Systems. iv. RCWD Rule C.2 (c) and (d) include provisions for cumulative impacts to trigger the rule. Therefore, it is possible for some work to have occurred under the District's jurisdiction, and any additional work thereafter to trigger regulation under the City's assumption of sole rule administration. For that reason, please be advised that the District's files are available for consideration of cumulative impacts.