Disposition Summary

Approve the variance to reduce the K value of Road A from 25 to 20 at PVI station 1+12.00, based on the following evidence of hardships.
A. This property slopes down by approximately 62 ft from the edge of Black Road to the rear boundary. There is a 28.8-ft elevation change along the right-of-way of Road A from its intersection at Black Road to the approximate middle of Road A at station 4+00.
B. The topography is unique to the property. Approval of this variance will result in less disturbance within the HP area designated on this property.
C. Approval of the variance is not anticipated to be detrimental to public safety, health, or welfare as there are no apparent sight distance issues on Black Road and no through connectivity via Road A.

Approve the requested alternative design standard to reduce the street frontage of the lots identified since the development meets the applicable requirements of Article 3.03.B.2 of the Subdivision Regulations and it is supported by Knox County Engineering and Public Works.

Approve the concept plan subject to 9 conditions.

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Staff Recommendation

Approve the variance to reduce the K value of Road A from 25 to 20 at PVI station 1+12.00, based on the following evidence of hardships.
A. This property slopes down by approximately 62 ft from the edge of Black Road to the rear boundary. There is a 28.8-ft elevation change along the right-of-way of Road A from its intersection at Black Road to the approximate middle of Road A at station 4+00.
B. The topography is unique to the property. Approval of this variance will result in less disturbance within the HP area designated on this property.
C. Approval of the variance is not anticipated to be detrimental to public safety, health, or welfare as there are no apparent sight distance issues on Black Road and no through connectivity via Road A.

Approve the requested alternative design standard to reduce the street frontage of the lots identified since the development meets the applicable requirements of Article 3.03.B.2 of the Subdivision Regulations and it is supported by Knox County Engineering and Public Works.

Approve the concept plan subject to 9 conditions.

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1. During the design plan phase, obtaining approval of Knox County Engineering & Public Works Department for the proposed location of the mail kiosk.
2. During the design plan phase, ensuring that any required sight distance easement is provided for the horizontal curve of Road A approximately between station 3+00 and station 5+50, subject to review and approval by Knox County Engineering & Public Works Department.
3. Ensuring connection to sanitary sewer and meeting any other relevant utility provider requirements.
4. Providing street names that are consistent with the Uniform Street Naming and Addressing System within Knox County (County Ord. 91-1-102).
5. Meeting all applicable requirements of the Knox County Zoning Ordinance.
6. Meeting all applicable requirements of the Knox County Department of Engineering and Public Works, including, but not limited to, ensuring that the stormwater retention pond(s) meet all requirements.
7. Before certification of the final plat for the subdivision, establishing a property owners association or other legal entity responsible for maintaining common facilities, such as common areas, amenities, private roads, and/or stormwater drainage systems.
8. Ensuring that land disturbance within the Hillside Protection (HP) area does not exceed 6.3 acres, as recommended by the slope analysis (attached). The limit of disturbance is to be verified and delineated on the site with high-visibility fencing before grading permits are issued for the site. Undergrowth in the undisturbed HP areas may be cleared for passive recreational uses, such as walking trails. Selective tree removal is permissible for the removal of invasive species or to alleviate safety hazards, such as trees that are falling, dead, or dying.
9. If during design plan approval or construction of the development, it is discovered that unforeseen off-site improvements within the right-of-way are necessary, the developer will either enter into a memorandum of understanding (MOU) with the County for these improvements or reimburse the County for their direct expenses (if completed by County crews) to make corrections deemed necessary.

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This application is a revision of the recently approved concept plan (12-SD-24-C) and development plan (12-E-24-DP) for unit 2 of the Black Ridge Pointe subdivision. The primary difference between the current plan and the approved plan is the right-of-way width and pavement width of public road 'A'.

Unit 1 of the subdivision included 6 lots for single family houses and was approved by the Planning Commission in March 2024 (3-SA-24-C, 3-B-24-DP). Unit 2 proposes to subdivide lot 7 of the Unit 1, comprising 8.39-acres, into 22 lots for attached dwellings, 1 lot for the existing house and accessory structures, and 3 common areas, yielding a density of 2.74 du/ac for Unit 2. The overall density of the subdivision is 2.96 du/ac.

VARIANCE
Vertical curves of a street are designed based on the Rate of Vertical Curvature, K, referred to as K value. K value expresses the abruptness of the grade change in a single value. For subdivisions in Knox County, section 3.04.I.4.b of the Subdivision Regulations requires a minimum K value of 25 for local streets. The property is relatively steep at the location of the variance request, which makes it challenging to meet the requirement for Road A. Staff recommends approval of the variance because this will result in less grading within the HP (Hillside Protection) area and the decrease is supported by the Knox County Department of Engineering and Public Works based on the justification provided by the applicant.

ALTERNATIVE DESIGN STANDARD
An alternative design standard is requested to reduce the street frontage of lots 8, 13, and 14 from 25 ft to 20 ft. The Planning Commission may approve a reduction of the lot frontage subject to the following requirements (Sub Reg 3.03.B.2) - all lots shall have a minimum front yard setback of 20 ft and guest parking shall be provided throughout the development. The subject lots meet the minimum front setback requirements and on-street parking can be accommodated on the wider portion of road 'A'. On-street parking is more appropriate for this development compared to any off-street parking areas that will require additional disturbance within the HP area.