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It will be necessary to follow the procedures as outlined below and all applicable State Department of Transportation Standard Specifications when opening, backfilling and patching excavations that are performed on city right-of-way. In case of conflict, this notice shall take precedence. All article and section references are to the current State Department of Transportation Standard Specifications for Road and Bridge Construction, herein referred to as IDOT Standard Specifications.
(A) Compaction of backfill material. Each excavation in or on a public street, driving surface, curb and gutter or sidewalk, or within two feet of a public street, driving surface, curb, gutter, curb and gutter, or sidewalk shall be backfilled per § 208 of the IDOT Standard Specifications, except as modified herein.
(1) Art. 208.02 “Materials” shall be changed to require the use of coarse aggregate as specified in Art. 704.04 of the IDOT Standard Specifications, and that the coarse aggregate gradation shall be CA06ii. Fine aggregate will not be allowed for haunching and trench backfill.
(2) Haunching and trench backfill material shall be compacted in according to Method 1, as specified in Art. 550.07 of the IDOT Standard Specifications.
(3) Whenever the City Engineer has reasonable cause to believe that backfilling for any excavation is not being done with acceptable materials or is not being adequately compacted, the City Engineer will require tests to determine whether or not the backfill material/compaction technique meets the minimum requirements prescribed. All expense for such tests shall be borne by the permittee.
(B) Benches, support. A 12-inch bench on all excavations in public streets, driving surfaces and sidewalks is required. A one-foot ledge of undisturbed earth on all four sides of the excavation shall be left to support the pavement patch. The one-foot distance shall be measured from the edge of the subgrade which is disturbed by the vertical excavation.
(C) Patches in pavement.
(1) All pavement to be patched must first be saw cut to the full depth of the pavement. The removal of the pavement shall result in a vertical patch face. If a non-vertical and/or rough face result from the removal process, the permittee will be required to extend the patch to eliminate these problems.
(2) Patches in concrete pavement shall be placed equal to the thickness of the adjacent pavement but in no case shall a concrete patch be less than eight inches. Saw kerfs in concrete pavement to be filled and sealed with either hot poured joint sealer or self leveling polyurethane sealer, limestone color. Edges of all concrete pavement patches and any construction joints within the patch, shall be tooled or sawn to provide an adequate reservoir for joint sealer. Joints to be sealed in the same manner as saw kerfs. Patching technique to be determined by existing pavement type per Art. 442.01, Class A, B or C. All patch classes to be placed per § 442, Pavement Patching. All concrete for concrete patches shall be a high early strength concrete capable of reaching a compressive strength of 3,200 psi within 16 hours. A non-calcium accelerator will be required in all cases. Opening the patch to traffic will be according to Art. 701.17(3).
(3) Where excavations are made in concrete pavements, the pavement area removed will also be controlled by the proximity of existing joints. If the pavement area to be removed is one foot or less from a joint, the pavement shall be removed to the existing joint. In no case, however, shall the one foot distance required by division (B) above be disregarded. If in the removal of pavement an expansion joint is damaged, or removed, it shall be replaced with pre-molded asphaltic expansion joint one inch thick. Joint to be sealed per Art. 420.05 and 420.12.iii
(4) Patches in oil and chip surfaces shall be eight-inch rock and three-inch hot mix asphalt surface. All asphalt work shall be per §§ 355 and 406. With the permission of the Engineer, the permittee may use full depth concrete; provided that, the concrete is dyed black with an approved concrete dye.
(5) Patches in areas previously overlain with asphalt streets shall be replaced as follows.
(a) Asphalt overlays shall have an asphalt surface equal to the thickness of the existing blacktop surface placed on a concrete base course. The concrete base course shall be the thickness of the original concrete, but not less than eight inches. All asphalt work shall be per §§ 355 and 406. With the permission of the Engineer, the permittee may use full depth concrete provided that the concrete is dyed black with an approved concrete dye. All concrete for concrete base course shall be a high early strength concrete capable of reaching a compressive strength of 3,200 psi within 16 hours. A non-calcium accelerator will be required in all cases. Opening the patch to traffic will be according to Article 701.17(3).
(b) All concrete patches and concrete base course will be tied to the adjacent concrete pavement, curb, gutter and combination curb and gutter with tie bars and dowel bars according to § 442 of the Standard Specification and according to current versions of IDOT Standards 420701, 442001 and 442101 or the city’s standard for concrete patching. The Engineer will determine which standard is applicable to the location to be patched prior to issuing a permit.
(c) Patches in asphalt streets shall match the existing pavement structure, but in no case shall asphalt thickness be less than eight inches, with six inches being base course and two inches surface course. Base course to be per § 355. Surface course to be per § 406.
(6) Written notification shall be given the City Engineer 48 hours prior to pouring or placing any permanent street patches.
(7) Temporary patches for the convenience of traffic movement must be placed. They shall be made with a good quality of bituminous patching material properly placed, thoroughly rolled to optimum compaction and of sufficient thickness to bear the type of traffic using the street. The individual or company holding the excavation permit shall be responsible to insure that the temporary patch is properly maintained. Temporary patching may not be left in place longer than 14 days. After removal of the temporary patch and prior to placing the permanent repair, the aggregate sub base shall be re-graded and re-compacted. Under no circumstances may aggregate be used for a temporary driving surface.
(8) Any pavement markings and/or raised reflective pavement markers that are removed with the patch shall be replaced with material of the same type as the material removed. Pavement markings shall be installed according to § 780 of the Standard Specifications. Raised reflective pavement markers shall be installed according to § 781 of the Standard Specifications.
(D) Sidewalk replacement.
(1) Sidewalk shall be sawn full depth at nearest joint. (See IDOT Article 424.07 for placement of expansion.)
(2) Where sidewalks are perpendicular to curb, or parallel and restricted on side opposite curb, a one-inch preformed expansion joint filler shall be inserted by curb before sidewalk replacement.
(3) Expansion joint filler shall be equal to “Homex-Plus” with bond breaker.
(4) After removal of top filler, expansion joint shall be sealed with polyurethane sealant, limestone color, equal to “Sonolastic” SL1 or SL2.
(5) Where street signs occur in sidewalk to be replaced, a four-inch diameter plastic pipe shall be placed centered on sign, full depth of sidewalk. Void around post shall be filled with cold patch and compacted.
(6) Where meter posts occur in sidewalk to be replaced, poles shall be isolated in a one-foot by one-foot square with expansion joint on square’s perimeter. Pole shall have a minimum one-foot diameter by one-foot deep foundation poured around it below bottom of sidewalk grade.
(E) Curb, gutter and combination curb and gutter patches.
(1) Curbs, gutters and combination curb and gutter are to be cut full depth and full width and carefully removed as to ensure a vertical edge.
(2) Where a patch occurs at a pavement expansion joint or no existing expansion device is within 50 feet of patch, a one-inch thick preformed expansion joint filler, cut to curb cross section shall be inserted and a one and one-quarter inch diameter, 18 inches long, smooth coated dowel bar, greased or fitted with endcap providing a minimum of one-inch expansion be installed. The curb, gutter and combination curb and gutter shall be tied to adjacent concrete pavement or concrete base course according to the current version of IDOT Standard 606001.
(3) Expansion fillers shall be equal to “Homex-Plus” with bond breaker.
(4) After removal of top filler strips expansion joints shall be sealed with polyurethane sealer, limestone color equal to “Sonolastic”.
(5) Saw kerfs resulting from cutting operation will be remedied as in division (C)(2) above.
(6) Requirements of the state’s Accessibility Code shall be adhered to at all times. If a ramp is built on one corner another shall be built on opposite corner. Ramps shall be constructed per IDOT Standard 2356-2.
(F) Traffic control.
(1) All excavation areas shall be properly barricaded and lighted for the protection of the general public.
(2) The individual or company holding the excavation permit shall be responsible to ensure that traffic control is maintained per applicable IDOT standards.
(G) Brick surfaces. Notwithstanding the previous portions of this notice, where excavations are made in brick surfaces, the surface shall be replaced with brick or an approved concrete stamp with the same color and texture. Restoration techniques shall be those prescribed by the City Engineer.
(H) Clean up. As the excavation work progresses, all streets shall be thoroughly cleaned of all rubbish, excess earth, rock and other debris resulting from such work. All clean up operations at the location of such excavation shall be accomplished at the expense of the permittee and shall be completed to the satisfaction of the City Engineer. From time to time as needed, and in any event immediately after completion of said work, the permittee shall, at his or her own expense, clean up and remove all refuse and unused materials of any kind resulting from said work. Failure to do so within 24 hours after having been notified by the City Engineer, will result in the City Engineer having the work done and the cost thereof charged to the permittee.
(I) Lawn restoration. At locations where it is necessary to excavate in lawns that are in public right-of-way the persons making the excavation will complete the restoration in the following manner.
(1) Backfill. Excavation shall be backfilled within 12 inches of final grade as per compaction of backfill material. The final 12 inches shall be of compacted top soil.
(2) Turf or grass areas. At the request of the city and adjacent property owners, sod of the type and quality that existed prior to excavation will be replaced.
(3) Decorative rock and miscellaneous landscaping material. At the request of the city and the adjacent property owners, decorative rock and other landscaping material of the type and quality that existed prior to excavation, will be replaced.
(4) Trees and shrubs. At the request of the city and the adjacent property owners, trees and shrubs of the type and quality that existed prior to excavation will be replaced. City Engineer to make the final determination based on “clear zones”, sewer locations and public safety; the City Engineer to consult with City Forester as to acceptable planting types.
(1960 Code, § 40-2-4) (Ord. 7087, passed 2-19-2008)