(A) Backfill. Backfill material for foundation and/or cellar walls shall be free of debris, wood scraps or other deleterious substances. Backfill shall be placed carefully against walls in layers 12” or less in thickness, and each layer shall be compacted to optimum density in order to avoid damaging settlement to drainage structures, walks, driveways, lawns or other lot improvements.
(B) Surface drainage. Positive surface drainage shall be provided for each lot by proper drainage so that there shall be no pocketing of water. This can be accomplished by grading or installing catch-basins or under-drains properly connected to approved disposal points.
(1) When a lot is graded to a higher or lower level than the natural grade, the owner shall provide suitable slopes or retaining walls or other protection on his or her property to preserve the natural surface elevation of adjoining property.
(2) Grading shall be done so that the existing natural ground drainage of the area is not impeded.
(3) Grading shall be done so that storm water run off to adjoining property is not concentrated to spill off the property at new locations.
(C) Roof and yard drainage. Where no storm sewer is available, then no garage apron, runway, or any entrance area below ground level, nor any area subject to receiving storm drainage, shall be permitted unless it has gravity drainage to the street or to a natural drainage course. The storm sewer shall not be considered available unless it is low enough to allow the slope of the lateral entering it to be at least 1/8 inch per foot.
(D) Gutters. All new buildings, except accessory buildings less than 800 square feet in area, or buildings with roof overhangs of 12 inches or more that have a side yard of at least 6 feet 6 inches from the far edge of the overhang to the property line, shall be equipped with gutters and downspouts.
(1) Where no gutters are used, the plans submitted for the building permit shall show on a grading plan of the lot that roof run off water shall follow drainage swales formed by intersecting slopes and that these swales carry water to some natural water course on the same property or to street curb.
(2) When gutters and downspouts are used, then downspouts must be connected by a pipe to a storm sewer if a storm sewer is available. If such sewer is not available then collector pipe shall run to a street gutter or street drainage ditch if same is available. If neither sewer nor gutter is available, then collector shall run to a natural drainage course on the owner’s property. The storm sewer shall not be considered available if the public right-of-way paving would have to be broken to get to the sewer or if tunneling would have to be resorted to under the street. Where connection to a storm sewer is impractical, splash blocks in lieu of underground pipe drains may be used when available yard area will permit dispersion of downspout water within the limits of the building lot.