The following general notes shall appear at least once on all construction plans.
(A) All materials and workmanship shall be in accordance with city and NCDOT standards, except as modified herein or as directed by the city.
(B) All erosion control devices shall be constructed and maintained in accordance with the most current NCDENR and County Natural Resource standards. Erosion control measures shall be removed at project completion when deemed no longer necessary by the County Inspector. All graded areas not under pavement and within the right-of-way or easements shall be prepared, fertilized and limed, seeded and mulched immediately upon completion of construction.
(C) All storm drain pipe within public rights-of-way and/or public drainage easements accepted for maintenance by the city shall be a minimum Class III 12-inch reinforced concrete unless otherwise approved and noted.
(D) (1) All water mains six inches and larger shall be ductile iron, pressure class 350.
(2) The City Inspector shall be present for all testing of water line installations and construction.
(E) (1) All sewer lines eight inches and larger shall be PVC SDR 35.
(2) The City Inspector shall be present for all testing of sewer line installations and construction.
(F) All drainage structures must meet NCDOT standards. Solid wall, pre-cast concrete structures conforming to NCDOT standards are acceptable (no waffle walls). All pipe openings in pre-cast structures must be cast or cored. Pre-cast structures shall be stamped by the manufacturer as NCDOT approved. The invert of all drainage structures shall be formed of concrete such that no standing water is possible.
(G) Stabilizing stone, geotextiles or other approved stabilization options shall be placed as required by the city when conditions warrant. Under drains shall be constructed as required by the city to stabilize subgrade.
(H) (1) Compaction tests by an independent testing lab shall be made at the owner’s expense and the report submitted to the city. Random stone base tests shall be taken every 150 feet and in cul-de-sacs, or as directed by city inspectors.
(2) The stone base shall be compacted to 100% of the maximum density obtainable with the Modified Proctor Test. When completed, the base course shall be smooth, hard, dense, unyielding and well bonded.
(I) The stone base proofroll shall be scheduled and performed with city inspectors. At the time of paving, edges and manholes/structures shall already be trimmed to the proper depth and all debris and loose stone removed.
(J) Proofrolling of subgrade and stone base shall be performed in the presence of the City Inspector using an over-loaded (on-site) triaxle dump with 22 to 25 tons of stone, third axle lifted. If rain occurs before placing stone on subgrade that has been proofrolled, or if rain occurs prior to placing asphalt on stone base that has been proofrolled, the subgrade and stone base must be proofrolled again as directed by the city.
(K) The contractor or owner shall submit a report of the random soil compaction tests performed every 150 feet and in cul-de-sacs, or as directed by the City Inspector. Once soil testing reports are submitted and the infrastructure suitable for pavement, the contractor or owner shall schedule a subgrade proofroll with the City Inspector.
(L) Prime coat is to be applied at a rate of 0.25 gallons per square yard as directed by the City Inspector.
(M) Existing curb and gutter and pavement shall be replaced or repaired as required to tie onto sound material.
(N) Any required storm drainage construction or reconstruction associated with this plan shall be performed at the owner’s expense.
(O) The contractor is responsible for locating all existing utilities prior to start of construction. All construction must conform to the Underground Utility Safety and Damage Prevention Act, being G.S. §§ 87-115 et seq.
(P) Wheelchair ramps with truncated domes (black paver type) are required where sidewalks intersect curb and gutter.
(Q) Water and sewer building connections shall be installed to the right-of-way line, spaced at 30 inches center to center, and shall not be placed in driveways or sidewalks. Water and sewer connections shall be stamped into the curb at the exact location of the crossing (“W” for water, “S” for sewer). All valves shall be indicated by a “V” stamped in the curb at a point closest to the valve.
(R) For standard curb and gutter streets, hydrants shall be placed one foot, two inches behind back of curb (measuring to center of the hydrant). For valley curb and gutter streets, hydrants shall be placed behind the sidewalk.
(S) The City Inspector must be present for all subgrade preparation, stone base and asphalt paving.
(T) For all residential streets, the final one and one-half inches of pavement is not to be placed until after 80% of the homes are closed within the subject phase. The final one and one-half inches of paving is not to be placed for streets that will be used to access future phases.
(U) Asphalt shall be temporarily ramped around structures to prevent damage prior to final paving. The temporary asphalt shall be removed just prior to the final paving. The street shall be inspected by the city prior to the final paving. Any cracked, settled or other damaged pavement sections shall be repaired prior to final paving.
(V) The contractor shall perform quality control on asphalt by performing a minimum of five random density tests per 2,000 1f. Compaction has to meet NCDOT requirements. Superpave mixes are to be compacted 92% of the maximum specific gravity (90% for SF9.5A mixes). Results are to be submitted to the city the following day.
(W) (1) Paving requirements: SF9.5A; S9.5A and B; minimum air temperature is 40°F with a minimum road surface of 50°F and rising.
(2) S9.5C; 12.5 C & D; minimum air temperature of 50°F with a minimum road surface of 50°F and rising.
(X) The contractor is responsible for placing barricades, using flagmen and the like, as necessary to ensure safety to the public.
(Y) Prior to final acceptance, the developer shall ultimately be responsible for correcting or seeing to the correction of all problems associated with the project, including those items not necessarily covered by the plans, to ensure the satisfactory completion of the total project.
(Z) Final paving shall not be placed on streets that will be used to access future phases.
(AA) All storm drainage pipe within inlets and manholes shall be cut flush with the inlet walls.
(Ord. passed 9-27-2021) Penalty, see § 153.999