Henn. Co./application for installation of utilities

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HC5137back(4/93) SPECIAL PROVISIONS (ROADWAY SURFACE) ` � A. CONCRETE PAVEMENTS 1. Openings The opening made in a concrete pavement must be so located that no side is within three (3) feet of a construction joint. If the side of the opening is within three (3) feet of construction joint, the concrete pavement must be removed to the joint. Before breaking the concrete, the slab must first be cut with a concrete saw full depth, and the exact location thereof must be approved by the Hennepin County Department of Public Works.All broken concrete must be removed from the site and disposed of. NO OPENING SHALL BE MADE lN PORTLAND CEMENT CONCRETE DURING WINTER MONTHS EXCEPT FOR EMERGENCIES. 2. Backfill and Compaction After the excavation has been completed, the requirements for the backfill, i.e.,kind of material, compaction, etc., shall be the same as specified for the repairs made for"Trenching or Sub-surface Operations". (See Paragraph "C"below). 3. Replacement of Concrete The concrete used for the final surface repair shalf consist of 3A42 high early strength concrete to meet Minnesota Department of Transportation Specification dated 1988, Spec. No. 2301. This concrete to be secured only from commercial plants which can furnish a mixture that is approved by Ffennepin Counry. The final finish must be burlap dragged or broomed so that it will match the surface of the adjoining concrete slab, and cured with an approved curing method. All construction joints shall be replaced. The fresh concrete patch shall be protected from all traffic contacts for at least 72 hours after it has been finished. B. BITUMINOUS PAVEMENTS 1. Openings When necessary to cut openings in bituminous surfaced roadways,the size of opening and location thereof must conform to size and location specified in the Permit, or to size specified by Hennepin Counry. When cutting the opening, the edges are to be cut in a straight line, and sides to be smooth and vertical. No ragged edges permitted. Cutting to be done with saw, mill or similar approved tools.All excavated bituminous material to be removed from the site and disposed of. NO OPENING SHALL BE MADE IN BITUMINOUS PAVEMENTS DURING WINTER MONTHS EXCEPT FOR EMERGENCIES. 2. Backfill and Compaction After the excavation has been completed, the requirements for backfill, i.e., kind of material, compaction, etc., shall be the same as specified for the repairs made for"Trenching or Sub-Surface Operations". (See Paragraph "C"below.) 3. Replacement of Concrete Base Use procedures listed under A-3.Allow the concrete to cure for 72 hours before placing bituminous materials. 4. Bituminous Tack Coat A tack coat shall be applied to all adjacent bituminous and concrete faces before placing the bituminous materials. 5. Restoration of Blacktop All blacktop surfaces are to be restored as soon as possible after backfilling has been completed. The kind and grade must be approved by Hennepin County. Replacement of the bituminous material shall be as directed by Hennepin County. 6. Damage to Blacktop Any blacktop area which has been scarred by equipment, lugs, cleats, teeth, etc., shall be replaced or repaired as directed by Hennepin County. C.TRENCHING OR SUB-SURFACE OPERATIONS 1. Openings Trenches for conduits, water, steam, oil and gas pipes, sewers and other utilities placed within the right of way shall be located as approved by Hennepin County. Trenches for construction along the highway shall not be opened for a distance of more than 300 feet at any one time, unless especially authorized. 2. Storage of Excavated Materials Excavated or other material shall be placed or stored on the side of the operation farthest from the traveled road unless otherwise authorized by Hennepin County, and in such manner that there will be no interference with the flow of water in any gutter, drain, pipe, culvert, ditch or other waterway. 3. Backfill and Compaction After excavation has been completed, it may be filled with the excavated material which has been removed, with the following exceptions: If the excavated material consists of mucky, soft or unstable soil, boulders or large rock, it must be removed and disposed of outside the county right-of-way and replaced with granular(sandy) material. The refilling of the trench shall be done with approved material compacted by the ordinary compaction method and shall follow as rapidly as possible the placing of sub-surface structures and shall be completed in such manner as will conform to the earth shoulder or subgrade or as directed by the Hennepin County Department of Public Works. 4. Replacement of Gravel Base The gravel base shall be replaced with approved material and compacted. All compaction must be in accordance with the Minnesota Department of Transportation Specifications dated 1988, Section 2105.3F2 "Ordinary Compaction Method".