Specifications include, but are not limited to: A . SIDEWALK – To be replaced or newly installed in accordance with the standard specifications contained within the City's Ordinance 6250 and Title 15-10-24 of the City of Hot Springs Code Book to provide replacement of excavated concrete sidewalks.; Sidewalks shall include ten (10) Gauge 6” x 6” welded wire fabric. Panels shall be cut in a square to match the existing width and have a minimum panel replacement of 4 LF. Acceptable material for backfilling and leveling shall be supplied by the Contractor. The Contractor shall achieve acceptable compaction of the base before installing concrete.; Sidewalks shall be of 3,000 psi concrete, 4" thick, and placed on 4" of compacted crushed stone aggregate base. However, the new base may not be required if the Engineer confirms that the existing subgrade and base under removed sections of existing sidewalks are adequate for the replacement sidewalk section. Where the existing subgrade or base is saturated or not compacted, it shall be removed and replaced with crushed stone aggregate. New sidewalks shall be formed and poured in accordance with the City standard details. ; Sidewalks marked for removal and replacement shall be removed to the next full joint, unless otherwise directed by the Engineer. Removal and replacement shall be made in rectangular shapes. No angles or corners are acceptable unless necessary for curves or transition areas. In no case shall a tapered or angled shape have a dimension of less than 6" in any direction, unless approved by the Engineer. Removal shall include saw cutting straight lines. The Contractor shall review the requirements under Quality Assurance section B. Concrete Testing.; B. CURB AND GUTTER – To be replaced or newly installed in accordance with the standard specifications contained within City's Ordinance 6250 and Title 15-10-24 of the City of Hot Springs Code Book to provide replacement of excavated concrete.; The curb shall be saw-cut to provide smooth square edges. The Contractor shall supply acceptable materials for backfilling and leveling for repair.; The curb and gutter shall be formed, shaped, and finished to match the existing surrounding curb, gutter, and grade. Gutters should not be placed to match grade with existing asphalt. New sections of the curb and gutter, not adjacent to the older sections, shall be formed and placed in accordance with the City Standard Details for Curb and Gutter. Concrete must meet a requirement of 3000 psi mix as approved by the City.; C. ADA WHEELCHAIR RAMPS - ADA wheelchair ramps shall be formed and poured in accordance with City and ARDOT Standard Details. The length of the ramp shall be such that the slope does not exceed 1:12.; The surface textured area shall be obtained by forming grooves 0.5" deep on 4" centers perpendicular to the length of the ramp. Yellow pads will not be required but may be used instead of forming grooves as described above.; The normal gutter flow line shall be maintained through the area of the ramp. Concrete shall not be placed in the gutter flow line.; The minimum thickness of the ramp, walk, and landing shall be 4". The minimum width of the ramps shall be the existing walk width or 48" whichever is greater.; Ramps shall be modified as necessary to ensure that they are parallel and the 0.5" grooves are perpendicular to a line drawn from the center of one ramp to the center of the ramp on the opposite side of the intersection. Ramps shall not direct pedestrians out into an intersection but shall be located perpendicular to the traffic flow.; Dimensions and quantities for skewed intersections will vary and are determined by the Engineer.; All street pavement markings shall be the responsibility of the City.; D. 4" CONCRETE PAD – Shall be 3,000-psi concrete, 4" thick, placed on 4" of compacted crushed stone aggregate base. If the Engineer confirms that the existing subgrade and base are adequate, the new base may not be required. However, if the existing subgrade or base is saturated or not compacted, it shall be removed and replaced with crushed stone aggregate. The Contractor shall review the requirements under Quality Assurance section B. Concrete Testing.; E. 4" CONCRETE PAD WITH REMOVAL OR EXISTING – The existing concrete shall be saw cut, removed, and disposed of. Replace with a 4” concrete section described in section D. 4" CONCRETE PAD above.; F. 6" CONCRETE PAD – Shall be 3,000-psi concrete, 6" thick, placed on 4" of compacted crushed stone aggregate base. If the Engineer confirms that the existing subgrade and base are adequate, the new base may not be required. However, if the existing subgrade or base is saturated or not compacted, it shall be removed and replaced with crushed stone aggregate. The Contractor shall review the requirements under Quality Assurance section B. Concrete Testing.; G. 6" CONCRETE PAD WITH REMOVAL OF EXISTING – The existing concrete shall be saw cut, removed, and disposed of. Replace with a 6” concrete section as described in section F. 6" CONCRETE PAD above.
