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Platte City, MO
Platte County
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Table of Contents
Table of Contents
[CC 1992 §510.140; Ord. No. 397 §2, 7-9-1985]
A. 
Water and gas lines running across City streets, sidewalks and other public places, shall be pushed or bored by a tunneling method unless it is shown that tunneling cannot be accomplished. In that event the Director of Public Works shall be notified and permission must be given prior to utilizing an alternative method such as a trench excavation. No excavation may be opened larger than three (3) feet by four (4) feet, provided that larger openings may be made when approved by the Director of Public Works or his/her designated representative.
B. 
No cut shall be made without the approval of the inspection office and the inspection office shall be informed when backfilling operations are ready.
[CC 1992 §510.150; Ord. No. 397 §3, 7-9-1985]
A. 
AB-3 rock (concrete rock with dust) is to be used for backfill up to the lower surface of the existing and surface materials. The AB-3 rock shall be placed in successive lifts of not more than twelve (12) inches and each lift is to be compacted by mechanical means. The AB-3 rock is to contain moisture sufficient to result in a finished base equal to or greater than the density of the adjacent material.
B. 
All service cut trenches with a width of twenty-four (24) inches or more shall cut the surface and subsurface back twelve (12) inches around the excavation.
C. 
On all curbed and guttered streets, regardless of existing surface, the street cut shall be filled with 3,000 p.s.i. concrete to a minimum of six (6) inches or from the base of the original pavement whichever is the greater. The concrete shall be flat-finished and neatly edged. Seal coat surfacings shall be replaced with a minimum of four (4) inches of asphalt. Hot mix asphalt shall be used. If seasonal or availability conditions warrant, cold mix asphalt may be used provided the cold mix equals the hot mix density. Rock or gravel roads and alleys are to be backfilled with AB-3 compacted to a density equal to or greater than the adjacent undisturbed area, then covered with rock that equals the original surface in size.
D. 
Asphalt and concrete are to be saw cuts and shall be parallel to the trench with corner angles being not less than ninety degrees (90°). The saw cut may be made when the cut is filled and is not required to be done at the time the cut is opened.
E. 
All finished surfaces are to be checked with a straight edge or string line at the time of finishing or tamping of the asphalt.
F. 
Excavations under sidewalks are to be backfilled with AB-3 and thoroughly tamped to achieve a density to prevent settlement.
G. 
Excavations extending back of the curb line or beyond the ditch line of gravel or seal coated streets shall be backfilled with the material from the excavation and further the initial four (4) feet shall be backfilled in six (6) inch lifts and tamped to ninety-five percent (95%) of optimum density using the standard proctor test as performed by a commercial test laboratory. Wet material that will not meet optimum moisture density shall be modified by the addition of four percent (4%) of hydrated or quick lime by volume. Existing ground cover is to be replaced by either stockpiled sod or freshly cut sod or seeding and fertilizer as may be approved by the Director of Public Works or his/her designated representative when the backfill is completed. Sodding or seeding is expected to be completed during the same day or the next working day. Backfill with frozen dirt may be done with the explicit understanding that the trench fill material is to be re-excavated and tamped when the ground thaws. In the event the inspector declares an excavation appears not to meet this standard the contractor may elect the following:
1. 
To have a minimum (2) shelby tube samples taken in the finished excavation to determine the in place density to be compared to an adjacent undisturbed sample. If the compacted materials fail to equal or exceed the level of adjacent soil density values, in the opinion of the commercial test laboratory, then the contractor will remove and replace all the trench fill materials. The Building Inspector or designated representative shall be sole judge of the quality of fill.
2. 
Replace the fill in its entirety to the heretofore enumerated standards.
[CC 1992 §510.160; Ord. No. 397 §4, 7-9-1985]
During a period of one (1) year from and after the date that any backfilling operation is completed, the contractor shall make all needed repairs arising out of defective workmanship or materials or both, which, in the judgment of the City, shall become necessary during such period.
[CC 1992 §510.170; Ord. No. 397 §5, 7-9-1985]
Any person being authorized under the ordinance of the City to make any excavation or opening in any of the streets, alleys or public grounds of the City is required to obtain a permit therefore and must notify City Hall before starting an excavation.
[CC 1992 §510.180; Ord. No. 397 §6, 7-9-1985]
Before excavation commences, the one holding the permit shall first make and file with the City Clerk a performance and maintenance bond in a sum equal to the contract amount of the work with good and sufficient sureties to be approved by the City. All work to be done shall be guaranteed and kept in repair by the contractor for a period of one (1) year from the date of its acceptance by the inspector. This guaranty includes all maintenance and repairs necessary to keep the work in first class condition. If, in the judgment of the inspector, repairs or renewals become necessary, then, upon notice at any time during the guarantee period by the inspector to the contractor, said repairs or renewals shall be promptly made and at the expense of the contractor who shall take out and remove all soft, inferior or defective materials found in any of the work done by him/her and replace same with good and acceptable materials and to do all work necessary to put such pavement in first class condition and said person further agrees and binds himself/herself that said improvements for such terms shall be and remain in good, serviceable condition, smooth and free from any defects that will impair its usefulness as a roadway; that upon failure of the person to undertake said repair or replacement within the time period contained in the notice to the person from the inspector the Director of Public Works may undertake said repair or replacement and make claim against the bond for the actual cost incurred including administrative charges, if any, incurred by the City.
[CC 1992 §510.190; Ord. No. 397 §7, 7-9-1985]
Every person before making any excavation within the public right-of-way shall cause a certificate of insurance to be posted with the City Clerk, in compliance with Section 515.030 hereof, said certificate shall also provide that the policy of insurance shall not be canceled, amended, changed or altered without giving the City Clerk ten (10) days' written notice thereof. Such certificate shall further provide for the indemnification of any person who shall incur damage claimed as a result of any of the work performed shall hold the City harmless and indemnify the City for any claim for damages as a result of said excavation or work related thereto by said contractor.
[CC 1992 §510.200; Ord. No. 397 §8, 7-9-1985]
Any person being authorized under the ordinance of the City to make any excavation or opening in any of the streets, alleys or public grounds of the City, shall notify the inspector designating the location, number of openings, the purpose for which the same is to be made, and the time within which the undertaking is to be completed.