(A) Addresses for sites in the unincorporated area of the county shall be governed by the rural reference system. The historical four-digit rural reference system wherein each section of land, as laid out by the public lands survey system, was assigned the dimensions of 100 units by 100 units shall be converted to a five-digit number system by the County Highway Department wherein each section of land shall be assigned the dimensions of 1,000 units by 1,000 units.
(B) Addresses for sites shall be determined as follows.
(1) A determination shall be made as to which road the site has vehicle access.
(2) The point at which the vehicle access for the site intersects or abuts the road shall be considered the site for the primary address number purposes herein.
(3) The orientation of the road as either an east-west road or a north-south road shall be established as follows.
(a) A determination shall be made as to the most southwesterly terminus and the most northeasterly terminus of the road.
(b) The total west to east distance between the termini of the road shall be compared to the total south to north distance between the termini.
(c) The direction covering the greater distance shall be the orientation of the road.
(4) The pro rata distance along the centerline of the road for the site along or within the section of land in which the site is located shall be determined as follows.
(a) Control Point A shall be determined as a point on the road which when traveling from the site toward the most southwesterly terminus of the road is the nearer of:
1. East-west roads. The point where the road crosses the nearest section line to the west; or the point where the road intersects the nearest road to the west; and
2. North-south roads. The point where the road crosses the nearest section line to the south; or the point where the road intersects the nearest road to the south.
(b) Control Point B shall be determined as a point on the road which when traveling from the site toward the most northeasterly terminus of the road is the nearer of:
1. East-west roads. The point where the road crosses the nearest section line to the east; or the point where the road intersects the nearest road to the east; and
2. North-south roads. The point where the road crosses the nearest section line to the north; or the point where the road intersects the nearest road to the north.
(c) The distance along the centerline of the road from Control Point A to the site shall be divided by the distance along the centerline of the road from the Control Point A to Control Point B, which ratio shall be the pro rata distance of the site.
(5) The difference between the rural reference numbers for Control Points A and B shall be calculated as follows:
(a) East-west roads. The east coordinate of the rural reference number for Control Point A shall be subtracted from that of Control Point B; and
(b) North-south roads. The north coordinate of the rural reference number for Control Point A shall be subtracted from that of Control Point B.
(6) The ratio of the pro rata site distance determined in division (B)(4) above shall be multiplied by the rural reference number differential determined in division (B)(5) above.
(7) The result of the calculation in division (B)(6) above shall be added to:
(a) East-west roads. The east coordinate of the rural reference number for Control Point A; and
(b) North-south roads. The north coordinate of the rural reference number for Control Point A.
(8) The result of the calculation in division (B)(7) above shall be rounded up or down as necessary to achieve a whole number that is a unique, five-digit primary address number for the road which meets the following requirements.
(a) Even primary address numbers shall be assigned on the right side of the road traveling from the southwesterly terminus to the northeasterly terminus of the road, which is also the south and east side of the road.
(b) Odd primary address numbers shall be assigned on the left side of the road traveling from the southwesterly terminus to the northeasterly terminus of the road, which is also the north and west side of the road.
(9) The primary address number obtained in division (B)(8) above shall be placed immediately before the road name resulting in a unique site address in the unincorporated area of the county.
(Ord. 07-10, passed 4-19-2007)