§ 6-8-5-9. IMPERVIOUS SURFACE.

(A)

The maximum impervious surface ratio for the R4 district is fifty-five percent (55%).

(B)

The impervious surface ratio is calculated by dividing the total defined net impervious surfaces on the zoning lot by the area of the zoning lot.

(C)

The total defined net impervious surfaces on the zoning lot are all areas included in building lot coverage plus any hard surfaced, nonnaturally occurring area that does not readily absorb water, including, but not limited to, any paved, asphalt or concrete areas, parking and graveled driveway areas, swimming pools, sidewalks, and paved recreation areas subject to the following exemptions:

1.

Any area, including open parking, paved or unpaved, included in the calculation of building lot coverage, shall not be twice counted in the calculation of total defined net impervious surface.

2.

Subject to the porch exemption of Section 6-8-5-10 of this Chapter, the following standards govern the classification of structures commonly referred to as decks:

(a)

Uncovered Decks with Permeable Surface Areas Underneath: Any uncovered deck, or a portion thereof, covering three percent (3%) of the lot area will be excluded from building lot coverage and impervious surface coverage calculation. Any lot area covered by an open deck above and beyond the initial three percent (3%) will count towards the impervious surface coverage calculation.

(b)

Uncovered Decks with Impermeable Surface Areas Underneath: One hundred percent (100%) of the lot area covered by an uncovered deck counts towards impervious surface area.

3.

Twenty percent (20%) of areas covered by paving made of impervious material to the extent that they cover an area that maintains a demonstrable level of porosity whether soil, sand, gravel, or similar material shall be excluded from the calculation of net impervious surfaces.

4.

Twenty-five percent (25%) of areas covered by paving blocks made of permeable materials and pervious paving systems to the event that they cover an area that maintains a demonstrable level of porosity whether soil, sand, gravel, or similar material shall be excluded from the calculation of net impervious surfaces.

(D)

Driveways or walkways legally existing as of the effective date hereof may be replaced or repaired, provided that the replacing or the repairing is in the same or lesser dimensions as existed on the effective date hereof.

(Ord. 112-0-03; Ord. No. 165-O-15 , § 5, 5-23-2016)