Morrisville Unified Development Ordinance - September 2020

ARTICLE 7: STORMWATER MANAGEMENT ................................................................................ 7-1 Section 7.1. General Provisions.............................................................................................................7-1

7.1.1. Findings......................................................................................................................................................................... 7-1

7.1.2. Purpose ......................................................................................................................................................................... 7-1

7.1.3. Authority ....................................................................................................................................................................... 7-2

7.1.4. Applicability and Jurisdiction.................................................................................................................................... 7-2

7.1.5. Map............................................................................................................................................................................... 7-3

7.1.6. Design Manual............................................................................................................................................................. 7-3 Section 7.2. Administration and Procedures..........................................................................................7-4

7.2.1. Stormwater Administrator.......................................................................................................................................... 7-4

7.2.2. Review Procedures...................................................................................................................................................... 7-5

7.2.3. Applications for Approval......................................................................................................................................... 7-6 7.2.4. Approvals..................................................................................................................................................................... 7-8

7.2.5. Stormwater Variances................................................................................................................................................ 7-8

7.2.6. Appeals ........................................................................................................................................................................ 7-9 Section 7.3. Standards ...........................................................................................................................7-9

7.3.1. General Standards..................................................................................................................................................... 7-9

7.3.2. Nitrogen and Phosphorus Loading.........................................................................................................................7-10 7.3.3. Nitrogen and Phosphorus Standard Is Supplemental; Total Suspended Solids (TSS) Removal ..................7-10

7.3.4. Control and Treatment of Runoff Volume.............................................................................................................7-10

7.3.5. Partial Offset of Nutrient Control Requirements .................................................................................................7-10

7.3.6. Evaluation of Standards for Stormwater Control Measures..............................................................................7-11

7.3.7. Dedication of BMPs, Facilities, and Improvements ..............................................................................................7-11 Section 7.4. Maintenance ....................................................................................................................7-12

7.4.1. General Standards for Maintenance ....................................................................................................................7-12

7.4.2. Operation and Maintenance Agreement..............................................................................................................7-12

7.4.3. Inspection Program ...................................................................................................................................................7-14

7.4.4. Performance Security for Installation and Performance ....................................................................................7-14

7.4.5. Notice to Owners ......................................................................................................................................................7-15 7.4.6. Records of Installation and Maintenance Activities.............................................................................................7-15

7.4.7. Nuisance .....................................................................................................................................................................7-15

7.4.8. Maintenance Easement.............................................................................................................................................7-15 Section 7.5. Enforcement and Violations .............................................................................................7-16

7.5.1. General ......................................................................................................................................................................7-16

7.5.2. Remedies and Penalties...........................................................................................................................................7-16 7.5.3. Procedures..................................................................................................................................................................7-17 Section 7.6. Illicit Discharges and Connections ...................................................................................7-18

7.6.1. Illicit Discharges .........................................................................................................................................................7-18

7.6.2. Illicit Connections .......................................................................................................................................................7-19

7.6.3. Spills ............................................................................................................................................................................7-20

7.6.4. Nuisance .....................................................................................................................................................................7-20 7.6.5. Enforcement................................................................................................................................................................7-20