§ 47-20.14. Lighting of parking facilities.  


Latest version.
  • A.

    A parking lot for a nonresidential use shall provide an average maintained horizontal footcandle illumination of a minimum of 2.0, with a minimum horizontal maintained footcandle illumination of 1.0. A 12 to 1 maximum to minimum uniformity ratio shall be maintained. The average maintained horizontal footcandle measurement shall be measured using a ten-foot by ten-foot grid. A vehicular use area for a residential use shall provide an average maintained horizontal footcandle illumination of a minimum of 1.0, with a minimum horizontal maintained footcandle illumination of .5. A 12 to 1 maximum to minimum uniformity ratio shall be maintained. The average maintained horizontal footcandle measurement shall be measured using a ten-foot by ten-foot grid.

    B.

    When lighting fixtures greater than ten (10) feet in height are used, they shall be located a minimum of fifteen (15) feet away from shade trees.

    C.

    Parking garage facilities shall provide an average intensity of illumination as follows:

    Maintained Illumination Values for Parking Garages
    Area
    Minimum
    Average
    Horizontal FC**
    Average
    Minimum Ratio
    Max
    Minimum
    Ratio
    Basic (Parking and Drives)
     Day* 5 5:1 10:1
     Night 5 5:1 10:1
    Ramps (No Parking)
     Day* 10 5:1 10:1
     Night 5 5:1 10:1
    Entrance Areas
     Day* 50 5:1 10:1
     Night 5 5:1 10:1

     

    *With daylight infiltration factored into the calculation

    **Foot Candle

    D.

    Parking garage facilities shall be designed and arranged so that no direct source of lighting is visible from any residential property or residentially used property. All parking garages not in full compliance with this subsection D. shall be removed or made to comply with its provisions no later than November 17, 2001, one year from the effective date of this subsection D.

    E.

    Lighting fixtures shall be shielded, angled, or both, so that direct or indirect light shall not cause illumination in excess of one-half (½) footcandle onto any residential property or residentially used property surrounding the parking facility, measured at the residential property line.

(Ord. No. C-97-19, § 1(47-20.14), 6-18-97; Ord. No. C-00-3, § 1, 1-19-00; Ord. No. C-00-65, § 1, 11-7-00; Ord. No. C-12-05, § 1, 4-3-12 )