Unified Development Ordinance, 4th supplement, September 2017

Part 10A: Unified Development Ordinance City of Raleigh, North Carolina 9 – 13 Effective Date: September 01, 2013 Supp. No. 4 Article 9.2. ​​Stormwater Management | CHAPTER 9. ​NATURAL RESOURCE PROTECTION Sec. 9.2.2. Active Stormwater Control Measures D. Stormwater Control Plans 1. General Requirements a. Stormwater control plans must be prepared by a qualified registered North Carolina professional engineer, surveyor or landscape architect. b. All parts of a stormwater control plan, including data calculation design and installation of storm control measures and devices shall be in compliance with the Raleigh Stormwater Control andWatercourse Buffer Manual. c. Stormwater control plans must show how nitrogen reduction and stormwater runoff control requirements are being met and how watercourse buffers are being protected. d. A surety equal to 125% of the cost of construction of a stormwater device shall be paid to the City prior to permit issuance. If the amount of impervious surfaces for the bonded area exceeds 15% , the City may cash the surety. 2. Maintenance Manual and Budget a. The stormwater control plan must be accompanied by a stormwater operations maintenance manual and budget. b. Prior to either grading any portion of the development or submitting construction drawing plans of any applicable stormwater control facility to the City, whichever event first occurs, a stormwater operations maintenance and budget shall be submitted to the Stormwater Utility Division of the PublicWorks Department. c. The maintenance manual shall contain a narrative describing each installed measure and device and its design specifications. d. The maintenance manual shall describe which lots are served by each device. e. The maintenance manual shall indicate for each installed measure and device what operation and maintenance actions are needed and what specific quantitative criteria will be used to determine when these actions will be taken. f. The maintenance manual must indicate the steps that will be taken to restore a measure or device to the design specifications if a failure occurs. g. The maintenance manual must contain a statement about the expected life of each stormwater control facility and a replacement schedule derived by dividing the initial construction cost of each stormwater control facility by the expected life of that stormwater control facility. h. The budget shall include annual costs such as routine maintenance, repair, periodic sediment removal and replenishment of rip-rap, insurance premiums associated with the stormwater control facilities, taxes levied against the stormwater control facilities, mowing and reseeding, required inspections. 3. As-Built Plans and Certification Stormwater control plans must be followed by as-built plans certified under seal, that the stormwater measures and devices and their installation are in compliance with the Raleigh Stormwater Control andWatercourse Buffer Manual and the City-approved or modified stormwater control plan. No certificate of compliance or occupancy may be issued by the Office of Development Services without approved as-built plans. At a minimum, the as-built plans must contain the following information: a. The name and address of the land owner; b. The recorded book and page number of the lot of each required stormwater control facility and required open space area; c. A statement that all inspected stormwater control facilities and open space areas are in compliance with the approved stormwater control plan, the applicable maintenance manual required and the Raleigh Stormwater Control andWatercourse Buffer Manual; and d. The original signature and seal of the engineer, surveyor or landscape architect. E. Stormwater Runoff Controls 1. Runoff Limitation a. After May 1, 2001, the peak stormwater runoff leaving any site for the two-year and 10-year storms shall be no greater at every point of

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