§ 90.900.3 DESIGN REQUIREMENTS.
   (A)   All sidewalks and trails shall meet all current Federal Americans with Disabilities Act (ADA) design and construction requirements.
   (B)   Transverse slopes shall not exceed 2% (0.02 ft/ft).
   (C)   When adjacent to streets, sidewalks shall be constructed at an elevation 1% above the adjacent curb and shall slope toward the street at a grade not exceeding 2%. There shall be a minimum of one foot between the sidewalk and the beginning of a slope. No walls shall be constructed within two feet of any sidewalk unless otherwise approved in writing by the city.
   (D)   Sidewalks shall be constructed in a manner that will conform to the existing grade and landscaping. Sidewalks which extend or link existing sidewalks shall adjoin the existing sidewalks to form a continuous, even pathway.
   (E)   Where sidewalks cross driveways, said driveway shall be designed and graded such that the sidewalk cross-slope and grade continues through the driveway the same width as the adjacent sidewalks. Slope shall not exceed 2% where sidewalk crosses driveway.
   (F)   Utility poles, utility boxes, mailboxes, and other similar obstructions shall not be located in sidewalk. Sidewalk location behind back of curb may be varied at the discretion of the city to avoid such obstacles.
   (G)   Sidewalks shall be constructed of Portland cement concrete with a minimum 28-day compressive strength of 3,500 pounds per square inch. Alternative materials must be approved in writing by the City Engineer and/or Planning Commission. Sidewalks shall be a minimum of four inches thick.
   (H)   Compacted granular base course shall be a minimum of three inches thick.
   (I)   Transverse tooled joints shall be provided perpendicular to the sidewalk at intervals equal to the sidewalk width.
   (J)   Expansion joints shall be installed perpendicular to the sidewalk at intervals equal to five times the sidewalk width. Joint material shall be the same as approved for ARDOT sidewalk construction (AASHTO M 213). Alternate material must be approved in writing by the city.
   (K)   Wheelchair ramps shall be installed in accordance with current ADA requirements including the placement of detectable warning devices. Accessible ramps shall be constructed where sidewalk intersects a curb, commercial driveway, street or alley. Width of ramp shall match width of adjoining sidewalk. Detectable warning device shall extend two feet in the direction of travel and shall be the full width of the curb ramp or flush pedestrian access surface. Detectable warning device shall be placed such that the domes align in the predominant direction of pedestrian travel. Detectable warning device shall be located so that the nearest edge of the device is six inches from the face of curb. Maximum slope of ramp shall be 8.33% in the direction of travel. Cross-slope shall not exceed 2%.
(Ord. 2009-11-347, passed 11-3-09; Am. Ord. 2010-06-356, passed 6-1-10; Am. Ord. 2018-11-816, passed 11-6-18)