|
<�, t��
<br /> �- .. �'. <'� �:' � t 2 3 �
<br /> SPECIAL PROVISIONS ����'` ��� � ���� � � -
<br />, ,�,r . . '"�- , , ,n.w,. . ,
<br />�<� (ROADWAY SURFACE)
<br />� A. CONCRETE PAVEMENTS
<br />�` 1. Openings �-x���
<br /> 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
<br /> side of the opening is within three (3) feet of a construction joint,the concrete pavement must be removed to the joint. Before
<br /> 4'
<br /> breaking the concrete, the slab must first be cut with a concrete saw to a depth of not less than two (2) inches,and the exact '";
<br /> 't%.
<br /> location thereof must be approved by the Hennepin County Department of Transportation.All broken concrete must be removed
<br /> from site and disposed of. �
<br /> NO OPENINGS SHALL BE MADE IfV PORTLAND CEMENT CONCRETE DURING WINTER MONTHS EXCEPT FOR �
<br />�' EMERGENCIES. IF OPENING HASTO BEMADE,ADJACENTEDGESWILL HAVE TO BE REMOVED ONE FOOT BEYOND
<br /> ORIGINAL EXCAVATION THE FOLLOWING SPRING AND REPLACED BY A PERMANENT PATCH.
<br /> 2. Backfill and Compaction
<br /> After the excavation has been completed, the requirements for the backfill, i.e., kind of material,compaction,etc.,shall be the
<br /> ,� same as specified for the repairs made for "Trenching or Sub-surface Operations". (See paragraph "C" below).
<br /> r�`� 3. Replacement of Concrete
<br /> The concrete used for the final surface repair shall consist of 3A42 high early strength concrete to meet Minnesota Department �n.
<br /> �;
<br /> of Transportation Specification dated 1983, Spec. No. 2301. This concrete to be secured only from commercial plants which
<br />�s-« can furnish a mixture that is approved by Hennepin County. The final finish must be burlap dragged or broomed so that it will
<br />�" match the surface of the adjoining concrete slab, and cured with plastic paper. All construction joints shall be replaced. The
<br /> fresh concrete patch shall be protected from all traffic contacts for at least 72 hours after it has been finished. �
<br /> B. BITUMINOUS PAVEMENTS �
<br /> 1. Openings �
<br /> When necessary to cut openings in Bituminous surfaced roadways, the size of opening and location thereof must conform to �
<br /> size and location specified in the permit, or to size specified by Hennepin County.When cutting the opening,the edges are to be �
<br /> cut in a straight line, and sides to be smooth and vertical. No ragged edges permitted. Cutting to be done with saw, jack- �
<br /> -� hammer, spades or similar approved tools.All excavated bituminous material to be removed from site and disposed of. No open- �
<br /> - ings shall be made in bituminous pavements during winter months except for emergencies.
<br /> 2. Backfill and Compaction �
<br /> After the excavation has been completed, the requirements for backfill, i.e., kind of material, compaction, etc., shall be the
<br /> same as specified for the repairs made for "Trenching or Sub-Surface Operations". (See paragraph "C"below.)
<br /> x� 3. Replacement of Concrete Base � �.
<br />�'p. �'`r�` e
<br />�-;� Use procedures listed under A-3. Allow the concrete to cure for 48 hours before placing bituminous materials. � R
<br />��`.` 4. Bituminous Tack Coat ��
<br />��"`, A tack coat shall be applied to all adjacent bituminous and concrete faces before placing the bituminous surface course. ��
<br />�R 5. Restoration of Blacktop
<br />'.'�'v� All blacktop surfaces are to be restored as soon as possible after backfilling has been completed. Bituminous surfacing material
<br /> may be obtained from most commercial "Blacktop" plants. The kind and grade must be approved by the Hennepin County �`=
<br /> Department of Transportation. Replacement of the bituminous material shall be made in layers not to exceed two (2) inches in
<br /> �
<br /> depth,each layer to be compacted with an approved roller or vibrating tamper unless otherwise specially authorized.
<br /> 6. Damage to Blacktop
<br /> Any blacktop area which has been scarred by equipment, lugs, cleats, teeth, etc., shall be replaced or repaired as directed by
<br /> Hennepin County.
<br /> �
<br /> �,;,
<br /> C. TRENCHING OR SUB-SURFACE OPERATIONS �
<br /> 1. Openings
<br /> Trenches for conduits, water, steam, oil and gas pipes, sewers and other utilities placed within the right of way shall be located �
<br /> as approved by Hennepin County. Trenches for construction along the highway shall not be opened for a distance of more than
<br /> 300 feet at any one time,unless especially authorized. �
<br /> � 2. Storage of Excavated Materials `�
<br />` Excavated or other material shall be placed or stored on the side of the operation farthest from the traveled road unless other- �
<br />�* wise authorized by Hennepin County,and in such manner that there will be no interference with the flow of water in any gutter, �.;
<br /> "�> drain,pipe,culvert,ditch or other waterway. ��v
<br /> ._;J;' :�?
<br /> 3. Backfill and Compaction �
<br /> After excavation has been completed, it may be refilled with the excavated material which has been removed,with the following 3
<br /> exceptions:
<br /> $� If the excavated material consists of mucky,soft or unstable soil, boulders,or large rock, it must be removed and disposed '�
<br /> `i of outside the county right of way, and replaced with granular (sandy) material. `�
<br /> �
<br /> '�i The refilling of the trench shall be done with Class 3 gravel or other approved material compacted by the ordinary compaction �
<br /> � method and shall follow as rapidly as possible the placing of sub-surface structures and shall be completed in such manner as
<br /> will conform to the earth shoulder or subgrade or as directed by the Hennepin County Department of Transportation. �
<br /> �.� a
<br /> ?��' 4. Replacement of Gravel Base �
<br /> x;
<br /> 'r_�i' The gravel base shall be replaced with approved material and compacted. All compaction must be in accordance with the Minne- "�
<br /> ' sota Department of Transportation Specifications dated 1983,Section 2105.3F2 "Ordinary Compaction Method". s�
<br /> i� �
<br /> � _�_..�,�
<br />
|