(A) (1) For individual lots disturbing less than one acre, developed within a larger permitted project, or larger than one acre individual parcels that are not part of a larger permitted project, a formal review and issuance of an individual lot plot plan clean water permit will be required before a building permit can be issued. If part of a larger permitted project, all stormwater management measures necessary to comply with this chapter shall be implemented in accordance with permitted plan for the larger project. All individual lot plot plans shall also receive the County Surveyor’s approval based on, but not limited to the following criteria:
(a) One-foot contours and how they were derived.
(b) All easements shown and labeled correctly.
(c) Sump pumps labeled near where it will be during construction. If no sump pump is being installed, then it will need to be annotated on the plan as such.
(d) Sub-surface drains (SSD) labeled (including the sump pump outlets).
(e) Sump pump outlets (connection or day lighted to open ditch or surface outlet) shall be shown.
(f) Perimeter drain for septic system, if required, shall be shown.
(g) Outlet for all perimeter drains with proper outlet protection.
(h) All invert elevations of pipe outlets shall be labeled.
(i) Swales annotated with arrows showing the direction of surface flow.
(j) First floor elevations (FFE or slab height) shall be two feet or greater above the emergency over-flow at the house.
(k) First floor elevations (FFE or slab height) shall be no greater than two feet higher, or lower, than any adjoining house elevation in a platted subdivision unless the proposed house is located in a subdivision and has been approved to be greater than two feet higher than an adjoining lot at the approval process of said subdivision plat.
(2) Note. Every site is unique and may require information and criteria specific to the site. The County Surveyor has the authority to modify, add to or amend any of these requirements based on the individual site of the proposed plot plan.
(B) The following information shall be submitted to the county for review and acceptance, by the individual lot operator, whether owning the property or acting as the agent of the property owner, as part of a request for review and issuance of an individual lot plot plan clean water permit that shall be obtained prior to the issuance of a building permit.
(1) The individual lot operator shall complete an individual lot clean water permit request and pay the applicable fee.
(2) A certified site layout for the subject lot and all adjacent lots showing elevation contours and its source, building pad location, dimensions, elevations, proposed sump pump connections (not to road sub-drains), and the drainage patterns and swales (including side yard swales).
(3) Erosion and sediment control plan that, at a minimum, includes the following measures:
(a) Installation and maintenance of a stable construction site access.
(b) Installation and maintenance of appropriate perimeter erosion and sediment control measures prior to land disturbance.
(c) Minimization of sediment discharge and tracking from the lot.
(d) Clean-up of sediment that is either tracked or washed onto roads. Bulk clearing of sediment shall not include flushing the area with water. Cleared sediment shall be redistributed or disposed of in a manner that is in compliance with all applicable statutes and rules.
(e) Implementation of concrete or cementitious wash water practices that securely contain and allow for the proper disposal of concrete or cementitious wash water.
(f) Adjacent lots disturbed by an individual lot operator shall be repaired and stabilized with temporary or permanent surface stabilization.
(g) Self-monitoring program including plan and procedures.
(4) Name, address, telephone number, and list of qualifications of the trained individual in charge of the mandatory stormwater pollution prevention self-monitoring program for the project site.
(C) The individual lot operator is responsible for installation and maintenance of all erosion and sediment control measures until the site is stabilized. Additional details are provided in the Hendricks County Stormwater Technical Standards Manual.
(Ord. 2023-45, passed 12-12-2023)