(A)   Property owner. The owner of any property that contains ESD non-structural or structural SWM practices installed pursuant to this chapter, or any other person or agent in control of such property, shall maintain in good condition and promptly repair and restore all ESD non-structural or structural SWM measures, grade surfaces, walls, drains, dams and structures, vegetation, erosion and sediment control measures, and other protective devices in perpetuity. Such repairs or restoration and maintenance shall be in accordance with previously approved plans.
   (B)   Maintenance program. The person responsible for facility maintenance shall institute a maintenance program that addresses every component of the SWM system. The program must include elements of routine maintenance including but not limited to the following:
      (1)   Regular visual inspection;
      (2)   Litter and debris removal;
      (3)   Vegetation management including regular mowing and control of woody vegetation on dam structures;
      (4)   Maintenance of undisturbed areas around infiltration facilities;
      (5)   Cleaning of oil/grit separators;
      (6)   Repair of erosion and settlement areas;
      (7)   Removal of collected sediments;
      (8)   Re-seeding or replanting of vegetation when needed; and
      (9)   Any maintenance required to maintain the stability and function of the system.
   (C)   Routine maintenance. The following routine maintenance may be required by the county:
      (1)   Bank and slope stabilization;
      (2)   Repair of severe erosion and heavy sedimentation after intense rainfall events;
      (3)   Repair of structural components;
      (4)   Maintenance and replacement of mechanical components;
      (5)   The replacement of filter medium and reconstruction of nonfunctioning infiltration facilities;
      (6)   The clean-out of underground storage structures and storm sewer systems; and
      (7)   The reconstruction of dams and other components.
   (D)   Visual inspections. During visual inspections evidence of the following shall be noted:
      (1)   Obstruction of inlet or outlet devices with trash or any debris;
      (2)   Any erosion or the collection of sediments in basins;
      (3)   Any surface cracking or settlement of the dam or associated structures;
      (4)   Low spots or depressions that collect water;
      (5)   The deterioration of pipes;
      (6)   The stability and general condition of emergency spillways;
      (7)   The stability of slopes;
      (8)   Upstream and downstream channel conditions; and
      (9)   Any vandalism.
   (E)   SWM facilities. SWM facilities shall be maintained to protect the general health and welfare of the community. Facilities shall be kept in a condition that does not allow for the unintended ponding of water such that mosquito breeding conditions occur. The facilities shall be maintained so that they are easily inspected and do not harbor pests or disease vectors.
   (F)   Pond maintenance. Wet pond maintenance shall include regular maintenance to control mosquito populations through the use of integrated pest management including water management and biological control. Mosquito control larvicides shall be used to inhibit population growth. If larviciding is not possible or the mosquito population at a specific facility is large enough to constitute a public health threat, mosquito adulticides shall be used.
   (G)   Vegetation management. Woody vegetation shall be prevented from becoming established on dam structures. Grass cover shall be regularly maintained by mowing at six to eight inches in height. Grass around facilities shall not be over-fertilized.
   (H)   Repairs. The prompt repair of ground surfaces, walls, drains, dams and structures, erosion and sediment control measures, and other protective devices and the re-establishment of vegetation is required. Any repair or restoration and maintenance shall be accomplished in accordance with plans approved by the county.
   (I)   Maintenance schedule. A perpetual maintenance schedule shall be developed for any ESD, nonstructural, or structural SWM practice and shall state the maintenance to be completed, the time period for completion, and identify the party responsible to perform the maintenance. This maintenance schedule shall be printed on the approved SWM plan.
(2004 Code, § 191-25) (Ord. 01-12, passed 9-27-2001; Ord. 04-07, passed 4-1-2004; Ord. 2010-05, passed 4-29-2010)