A. 
Prior to the issuance of any permit for which a stormwater site plan is required, the city shall require the applicant or owner to execute an "Agreement to Maintain Stormwater Facilities and to Implement a Pollution Source Control Plan" for privately owned stormwater facilities or an "Agreement to Maintain Stormwater Facilities – Two (2) Year Warranty and Satisfactory Maintenance Period" for publicly owned stormwater facilities.
B. 
The "Agreement to Maintain Stormwater Facilities and to Implement a Pollution Source Control Plan" for privately owned stormwater facilities shall be recorded by the city with the Pierce County auditor.
(Ord. 2316 § 1 (part), 2010; Ord. 2356 § 11 (part), 2011)
A. 
The owner of the property on which work has been done pursuant to these regulations for private storm drainage systems, or any other person or agent in control of such property, shall maintain in good condition and promptly repair and restore all grade surfaces, walls, drains, dams and structures, vegetation, erosion and sediment control measures, and other protective devices. Such repairs or restorations and maintenance shall be in accordance with approved plans.
B. 
An operation and maintenance schedule shall be developed for any storm drainage system and shall state the required maintenance to be performed, the equipment and skill level necessary to perform the maintenance, and the required frequency of maintenance. The operation and maintenance schedule shall either be printed on the stormwater site plan or submitted under separate cover. The operation and maintenance schedule shall comply with the agreement to maintain stormwater facilities.
C. 
The maintenance and operation of a private storm drainage system shall be the responsibility of the property owner. Furthermore, the property owner shall, in accordance with the operation and maintenance schedule, record and log maintenance performed and date. Operation and maintenance records shall be retained by the property owner for a minimum of three years and shall be available to the city for inspection at all reasonable times. The property owner shall be required to submit an annual report to the city by May 15th of each year. Required elements to be included in the annual report are specified in Sumner Development Specifications and Standard Details, Chapter 5.
D. 
The city will be responsible for the maintenance and operation of all public storm drainage facilities located within public easements and rights-of-way following the completion of the successful maintenance period and the acceptance of such facilities by the city.
E. 
Inspections of all permanent stormwater treatment and flow control BMPs/facilities and catch basins in new residential developments shall be performed every six months until 90 percent of the lots are constructed, or when construction has stopped and the site is fully stabilized.
(Ord. 2316 § 1 (part), 2010; Ord. 2356 § 11 (part), 2011; Ord. 2586 § 2 (part), 2016)
Stormwater facilities serving single-family residential developments located in low density residential districts will be owned and maintained by the city. Stormwater facilities serving single-family residential, multifamily residential, commercial, and industrial developments in all other zones shall remain privately owned and maintained pursuant to a separate stormwater management agreement between the city and the owner of each lot within the development. Maintenance required for private stormwater drainage systems and public stormwater drainage systems is as set forth in Sumner Development Specifications and Standard Details, Chapter 5.
(Ord. 2316 § 1 (part), 2010; Ord. 2356 § 11 (part), 2011; Ord. 2869 § 1, 2024)
After satisfactory completion of the facilities and prior to release of the stormwater facilities bond by the city, the applicant shall commence a two-year period of satisfaction maintenance of the storm drainage system. A cash or surety bond to be used at the discretion of the public works department to correct design and/or workmanship defects and maintenance deficiencies affecting public health, safety, and welfare must be posted and maintained throughout the two-year maintenance period. The amount of the bond shall be 20 percent of the actual construction cost of the storm drainage system. Stormwater maintenance and defect bonds shall be required for both public and private stormwater facilities.
(Ord. 2316 § 1 (part), 2010; Ord. 2356 § 11 (part), 2011)