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Posted on: June 2, 2020

Radnor Lake Natural Area Impact Zone proposed Ordinance

Oak Hill Street Class Map_ZoningAmendment_2020_lores

ORDINANCE NO. O-20-07-01-90


 WHEREAS, the City of Oak Hill’s Board of Commissioners have determined that updates to the City’s Zoning and Land Use Control Codes are needed to achieve the desired objectives of the City of Oak Hill; and

 WHEREAS, Pursuant to authority granted by Tennessee Code Annotated 6-54-501 to 6-54-506, and for the purpose of establishing this map amendment; to preserve and protect the visual and/or watershed impact on the Radnor Lake State Natural Area, the attached map is adopted by reference.


 Section 1.

Section 14-139: Radnor Lake Natural Area Impact Zone: That Section 14-139 be deleted.

Section 2.

Section 14-139: Radnor Lake Natural Area Impact Zone: That the following language be added:

14-139. Radnor Lake Natural Area Impact Zone. The Radnor Lake State Natural Area is identified as a unique natural resource for the use and enjoyment of the citizens of Oak Hill and the larger metropolitan area and is worthy of special protection. Therefore, the Radnor Lake Natural Area Impact Zone is hereby recognized and is included on the zoning map as a part of this ordinance. The Radnor Lake Natural Area Impact Zone (“impact zone”) includes all areas of the Radnor Lake State Natural Area and is delineated on the city zoning map. Said map is hereby revised by this ordinance shall be made available for public inspection in the Oak Hill City Hall during normal business hours. The applicant shall pay, as adopted by board of commissioners’ resolution, for review by the planning commission for the Radnor Lake Natural Area Impact Zone Ordinance or in connection with the steep slope ordinance.

  1. Site plan required. No building permit shall be issued for any lot in the impact zone until a site plan meeting the following requirements has been approved by the planning commission. Said site plan shall show:

  2. The exact size, shape, and location of the lot, and the existing drainage pattern.

  3. The proposed location of all buildings, driveways, and drainage ways,

  4. The type and location of erosion control methodology,

  5. Contours at vertical intervals of no more than five feet (5’),

  6. The extent of natural tree cover and vegetation,

  7. The location of any on-site soil absorption sewage disposal system,

  8. The exact area where any natural vegetation is proposed to be removed,

  9. The size, type, and height of all buildings proposed to be constructed.

  10. Development standards. The following standards shall be used as a guide for builders, developers, property owners, and the planning commission in minimizing the impact of the natural area:

  11. The clearing of trees and vegetation shall be limited to the area required for driveways, turnarounds, the house site, and a reasonable area around the house for landscaping purposes for all areas within the Radnor Lake Natural Area Impact Zone. The intent here is to limit visibility from the natural area to any structure. The planning commission may require replacement of removed trees up to the caliper inches removed.

  12. The site for the house shall be situated so that ridgelines and down slopes to the natural area are avoided to the maximum extent possible.

  13. Erosion control measures shall be employed to prevent all soil material from leaving the site. Additionally, all aspects of the Metropolitan Nashville Storm Water Management Ordinance shall apply as appropriate.

  14. The maximum height of any building shall not extend more than forty feet (40’) above the ground level at any point.

 (c) Subdivision review requirements. Any development occurring within the Radnor Lake Impact Zone which is a subdivision as defined by the Oak Hill Subdivision Regulations shall be required to observe the following provisions, which are supplemental to the other regulations:

1. Road locations shall be situated so as to minimize to the maximum extent possible any visibility from the lake or trails.

2. Erosion control measures shall be employed to prevent all soil materials from entering the natural or man-made drainage ways which are located within the Radnor Lake State Natural Area. This shall be required as a part of the preliminary plat approval process, and certification as to the effectiveness of the erosion control measures shall be required of the design engineer.

3. Cutting trees and removal of the natural vegetation shall be discouraged and limited to the subdivision roadways and required slopes. Individual lots shall be subject to the requirements in 14-139(b) above.

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