SUBJECT:
Title
Dunnellon Plaza - Waiver Request to a Major Site Plan in Review
Project #2023120015 #30925 Parcel #32909-011-01
Harris Civil Engineers, LLC
LDC 6.13.8B(7) - Minimum Pipe Size
CODE states Stormwater conveyance pipes and cross culverts shall be a minimum of 18 inches diameter or equivalent. Driveway culverts shall be a minimum of 15 inches diameter or equivalent for residential use and a minimum of 18 inches diameter or equivalent for commercial use. Roof drains, prior to connection to the overall stormwater system, are exempt from minimum diameter requirements.
APPLICANT request - Harris Civil Engineers, LLC (HCE) is submitting this letter request for the pipe size use of fifteen (15) Inches for gravity flow storm drainage on the above-mentioned project. Pursuant to Marion County Land development code section 6.13.8.b.(7), the project seeks to be permitted to construct the Stormwater conveyance system with a minimum pipe size of fifteen (15) inches, in lieu of the stated Eighteen (18) inches. Further, the design plans show eight (8) inch pipes for the roof drainage connections only. Per code, Roof drains prior to connection with the overall stormwater system as exempt from minimum diameter Requirements. There are two (2) locations on plan for yard drains, which have a twelve (12) inch Connection. It is our understanding that this size is acceptable for yard drain applications only. All infrastructure in the development will be privately owned and maintained. HCE created a hydraulic Capacity computer model for the stormwater collection system to confirm that the pipes have been sized sufficiently. With the fifteen (15) inch pipes included in the model, the hydraulic grade line does Not exceed the rim elevation set for the inlet structures during a 25-year/24-hour rainfall event. Please refer to the stormwater collection design report and calculation report for the analysis.
LDC 6.12.22 Sidewalks
CODE states at the discretion of the development review committee, in lieu of construction along external streets, the developer may pay a sidewalk fee to the county in an amount necessary to complete construction. This amount shall be determined by the project engineer and approved by the county with payment required prior to final plan approval. The county may use these funds toward the construction of sidewalks throughout the county based on priorities established by the board.
APPLICANT - owner requests to pay $49,625.00 construction waiver fee in lieu of constructing a sidewalk along us Hwy 41.
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