Prior to placing any pavement, manhole frames and covers, valve boxes, and other such utility access structures shall be adjusted in elevation by the Contractor if needed to match the surface of the new pavement. For overlaying existing pavement, cast iron or ductile iron extensions rated for not less than H-20 loading of a manufacturer and model approved by the Engineer or the designated representative of the Engineer may be used. For other than overlaying of existing pavement, the Contractor shall adjust the height of manhole frames and covers, valve boxes, and other such utility access in a manner acceptable to the Engineer or designated representative of the Engineer and to the grades required for the new pavement. Stabilize and compact subgrade or base material as shown on plans for pavement. Dry subgrade or base to be moistened prior to concrete placement.
(Ordinance 2007-106, App. B, adopted 3/20/07)
A. 
Curbs and Gutters.
The curbs and gutters shall be of the thickness, width, and at the locations and elevations shown on the plans. With the aid of a straight edge, steel trowel and steel “gooseneck,” all curbs and gutters will be finished true to line, grade and cross section. The straight edge will be used for the face of the curb and in the gutter. The curb and gutter shall be worked with a steel trowel and “gooseneck” to give the work the appearance of a trowel finish, then edged and jointed.
1. 
Forms.
Forms shall be of metal or wood and shall be clean and straight. Wood forms for straight sections shall be 2" nominal thickness. Securely stake forms to line and grade and maintain position during concrete placement. Lightly oil forms before use.
2. 
Reinforcing Steel.
Reinforce all curbs and gutters and valley gutters. The reinforcing steel shall be accurately placed and secured in position in the forms. Plastic chairs or spacers shall be used to keep the reinforcing steel in proper position. Bars shall be lapped at least twenty-four (24) bar diameters where splicing is necessary, unless otherwise noted. No bar shall be spliced at points of maximum tension. The concrete covering the reinforcing steel shall have a minimum thickness as indicated on the plans, or if not shown, the applicable requirements of ACI Building Code 318-63 shall govern.
3. 
Joints.
Joints shall be provided as specified herein and where directed on the plans. An edging tool shall be used to provide the joints with rounded edges of one-eighth (1/8) inch radius.
a. 
Dummy Groove.
Dummy groove joints shall be placed at ten (10) foot intervals in curbs and gutters. The dummy groove joints shall not be less than one (1) inch in depth.
b. 
Expansion.
Curbs and gutters shall be provided with the three-fourth (3/4) inch premolded expansion joints at intervals not exceeding sixty (60) feet, unless otherwise shown on plans. The filler shall extend the full depth of the concrete but shall be one-fourth (1/4) inch below the finish surface of the concrete. Seal all expansion joints with specified sealer.
4. 
The plans indicate the presence and approximate locations of existing driveways. Driveways widths may vary. Whenever the presence of a driveway is indicated on the plans, the vertical sections of the curb and gutter shall be omitted for the distance as indicated on the plans, or as approved by the Engineer or the designated representative of the Engineer. When removing and replacing a portion of an existing concrete driveway is necessary, as indicated on the plans or approved by the Engineer or the designated representative of the Engineer, that portion shall be removed along a neat, straight line and replaced in a workmanlike manner between that line and the new construction. The removed portion of the driveway shall be disposed of by the Contractor. The new section of the driveway shall be equal in quality and appearance to that portion which was removed.
5. 
When the grade of an existing dirt, gravel or iron ore driveway must be altered in order to conform to the proposed construction, the work shall be performed by the Contractor and a driveway must be produced that is equal to the one removed. There will be no separate payment for this work.
B. 
Valley Gutters.
The plans shall indicate the valley gutters’ thickness, widths, lengths, locations, and elevations.
1. 
Forms shall be placed along all the edges of the valley except where they will connect to existing curbs and gutters. Premolded expansion joint material shall be placed against these edges to serve as edge forms during construction. An approved method must be used to form a neat line between the new construction and the existing pavement when removal of existing asphalt surface and base is necessary to install a valley gutter. The cost for removal and replacement of the asphalt surface and base will be included in the unit price bid for the valley gutters.
2. 
Repairs and alterations to existing valley gutters shall be indicated on the plans or directed by the Engineer or the designated representative of the Engineer. The alterations shall conform to the applicable requirements specified for new valley gutters.
C. 
Asphalt and Base Material:
When existing base and asphalt are removed and replaced, suitable means shall be used to form a neat line where the new construction and the existing pavement adjoins without damaging the existing pavement which is to remain.
(Ordinance 2007-106, App. B, adopted 3/20/07)
Notify DPW or the designated representative of the Engineer prior to placing concrete to allow inspection of forms, reinforcing and joints.
(Ordinance 2007-106, App. B, adopted 3/20/07)