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Restoring Existing Improvements

Restoring Existing Improvements

(Section 02590)

PART 1 GENERAL

1.01 WORK INCLUDED

A. Contractor shall provide all materials, labor, equipment, transportation, and other items required to restore existing improvements dislocated, damaged, or removed as indicated or as required to accomplish Work of other sections of these specifications. All restoration Work shall be in accordance with applicable regulations and as specified herein.

B. Restoration of existing improvements includes, but is not limited to the following:

     1. General Restoration Requirements

     2. Restoration or replacement of gravel, asphaltic concrete, or portland cement concrete pavements, including base course and striping.

     3. Portland cement concrete curbs, gutters, sidewalks, and driveways

     4. Landscaping improvements

     5. Miscellaneous improvements

1.02 RELATED WORK

A. Section 02220 - Excavating, Backfilling and Compaction

     1. Compaction requirements under paving and landscaped areas, removal of unsuitable materials.

B. Section 02513 - Concrete Sitework

     1. Requirements for concrete curb and gutters, sidewalks, and driveways.

C. Section 02665 - Potable Water Distribution Systems

     1. Materials and installation practices for valves, hydrants and water appurtenances.

D. Section 02730 - Sanitary Sewer Systems

     1. Materials and installation practices for sewer laterals, manholes and appurtenances.


1.03 REFERENCES

A. The applicable provisions of the latest editions of the References listed below shall govern the Work covered under this Section, unless there is a conflict between said References and the requirements of this Section. In the case of such a conflict, the requirements of this Section shall apply.

B. State of Utah Standard Specifications for Road and Bridge Construction, latest edition including all addendums.

C. American Society for Testing and Materials (ASTM)

D. American Association of State Highway and Transportation Officials (AASHTO)

E. American Concrete Institute (ACI)

F. Concrete Reinforcing Steel Institute (CRSI)

G. Midvale City Corporation Standard Construction Details

1.04 SUBMITTALS

A. Submit shop drawings, manufacturer's literature, certifications, and other product data in accordance with other sections and as specified herein.

B. Required submittals include, but are not limited to:

     1. Manufacturer's recommended transportation, unloading, and storage requirements as well as installation guides and instructions for materials provided as part of this Work.

     2. Evidence of materials conformance with applicable requirements as well as these specifications.

     3. Dimensional information for pipes, valves, fittings, castings, structures and other items provided as part of this Work.

C. Contractor shall maintain accurate construction record drawings for items restored as part of this Work, but covered by subsequent landscaping, paving or as a result of Work of other sections of these specifications. These records shall be submitted to Engineer for approval prior to application for final payment.

1.05 QUALITY ASSURANCE

A. Transportation, handling, storage and installation practices shall be in accordance with manufacturer's recommended practice for materials provided as part of this Work.


B. Use adequate numbers of skilled workmen who are trained and experienced in the type of construction required.

C. The quality of the finished restored improvement, as determined by the Owner, shall be of equal or better quality than was said improvement prior to being damaged or removed.

D. Midvale City requirements shall govern for all work in Midvale City road right-of-ways:

     1. All work shall conform to the applicable standards, regulations, and requirements of the Midvale City Public Works Department.

1.06 DELIVERY, STORAGE AND HANDLING

A. Contractor shall be responsible for proper transportation ,unloading, handling, storage, and security of all equipment and materials to be provided as part of this specification in accordance with manufacturer's recommendations.

B. Materials shall be stored in such a manner as to prevent damage or degradation. Any materials damaged prior to installation shall be removed from the project and replaced with new materials at no additional cost. Lost or stolen materials shall be replaced at no additional cost.

1.07 PROJECT CONDITIONS

Not Used

PART 2 PRODUCTS

2.01 MANUFACTURERS

A. Manufacturers providing materials or equipment as part of this specification shall have a minimum of five ( 5) years experience in the design, manufacture, testing and support of such materials.

B. Manufacturers shall provide, upon request, verification of a consistent record of meeting or exceeding materials or performance standards as specified herein.

2.02 MATERIALS - GENERAL

A. Materials shall be as required to complete the restoration of existing improvements, and shall be at least equal to original improvement at the time of damage or removal, as determined by the owner of said improvement, and shall match original construction in finish and dimension.

B. Materials shall be in accordance with requirements of local jurisdiction having authority. Obtain approval of all materials from local jurisdiction having authority prior to ordering.


2.03 UNTREATED BASE COURSE

A. Base course shall be in accordance with State of Utah Standard Specifications for Road and Bridge Construction, Paragraphs 301.2 and 301.3, 1-inch Gradation:

          Sieve % Passing

          1" 100
          1/2" 79 - 91
          No. 4 49 - 61
          No. 16 27 - 35
          No. 200 7 - 11

2.04 BITUMINOUS PAVING MATERIALS

A. Bituminous prime coat shall be MC-70 asphalt conforming to AASHTO M82 - Cut Back Asphalt (Medium Curing Types).

B. Bituminous tack coat shall be a mixture of one part slow setting emulsified asphalt and one part water.

     1. Emulsified asphalt shall meet either of the following requirements:

          a. Conform to SS-1h as described in AASHTO M140 - Emulsified Asphalt.

          b. Conform to CSS-1h as described in AASHTO M208 - Cationic Emulsified Asphalt.

C. Asphaltic concrete surface course shall be plant mix in accordance with State of Utah Standard Specifications for Road and Bridge Construction, Section 402, and shall consist of mineral aggregate and bituminous binder.

     1. Mineral aggregate shall meet one of the following gradations, as determined by the Inspector:

          a. 1/2 inch gradation:

               Sieve % Passing

               1/2" 100 No. 4 60 - 80
               No. 16 28 - 42 No. 50 11 - 23
               No. 200 5 - 9

 

          b. 3/4 inch gradation:

               Sieve % Passing

               3/4" 100
               3/8" 75 - 91
               No. 4 46 - 62
               No. 16 22 - 34 No. 50 11 - 23
               No. 200 5 - 9

     2. Bituminous material shall be asphalt cement with a viscosity grade of AC-10 as determined by AASHTO M226 - Viscosity Graded Asphalt Cement and Paragraph 704.2 of the State of Utah Standard Specifications for Road and Bridge Construction.

2.05 PORTLAND CEMENT CONCRETE

A. Portland cement concrete for curbs, gutters, sidewalks and driveways shall conform to the requirements of Section 02513 - Concrete Sitework.

2.06 SOD AND VEGETATION

A. All materials shall be from sources approved by the Owner; however, such approval does not relieve the Contractor from responsibilities for growth, maintenance and replacement specified herein.

B. Topsoil:

     1. Topsoil for backfill mixture for tree pits shall be fertile, friable, natural loam, surface soil, reasonably free of clay lumps, brush, weeds, and other litter, and free of rocks, stumps, stones larger than 2" in any dimension, and other extraneous or toxic matter harmful to plant growth. Obtain topsoil only from naturally well drained sites where topsoil occurs in a depth of not less than 4".

     2. Do not obtain from bogs or marshes.

C. Manure:

     1. Well dried, rotted, unleached, pulverized cattle manure reasonably free from refuse and harmful materials.

D. Mulch:

     1. Fine grind bark mulch.

E. Tree staking and guying:

     1. Steel T post stakes 8 feet long and steel ground stakes 18 inches long.

     2. All T post stakes shall be primed and painted a dark green color.

     3. Provide wire ties and guys of 2 strand, twisted, pliable, galvanized iron wire not lighter than 12 gauge.

     4. Provide new 2 ply garden hose not less than 5/8 inch diameter in size, cut to required lengths to protect tree trunks from damage by wires.

F. Sod:

     1. Strongly rooted blend of Kentucky Blue Grass sod, not less than 2 years old and free of weeds and undesirable native grasses.

     2. Provide only sod capable of growth and development when planted (viable, not dormant).

     3. Recommended Kentucky Blue Grass mixture is: 50% Baron, 25% Glade and 25% Touchdown, or approved equal.

G. Commercial fertilizer:

     1. Agriform 20 10 5 21 gram fertilizer tablets for trees and shrubs. Provide three tablets per tree.

     2. Ammonium sulfate fertilizer in pellet form for lawn areas at 40 actual pounds of nitrogen per acre.

H. Trees:

     1. Trees shall be not less than indicated sizes, balled and burlapped or container grown, unless otherwise indicated, specified or required by Owner of tree removed.

I. Shrubs:

     1. Shall be as removed, minimum 5 gallon can.

PART 3 EXECUTION

3.01 EXAMINATION

A. Verify that Work covered under other sections of these specifications is complete to the point that Work covered under this section may properly commence without hindering or damaging Work of other trades. Do not proceed with construction until unsatisfactory conditions have been corrected.

B. Verify that Work performed under other sections of these specifications has been adequately inspected, tested and accepted prior to covering up that Work as part of the Work specified under this section.

C. Carefully examine restoration areas, verifying dimensions, materials and other restoration requirements with Engineer and Owner prior to beginning Work covered under this section..

3.02 METHODS AND PROCEDURES

A. General Requirements

     1. Contractor shall obtain all permits necessary for the restoration of existing surface improvements.

     2. Contractor shall protect all public and private property adjacent to the work. Exercise due caution to avoid damage to such property.

     3. All improvements damaged or removed shall be restored in accordance with local jurisdiction having authority. In case of conflict between these specifications and local authority specifications, the local authority shall govern.

     4. Repair or replace all existing surface improvements, which were damaged or removed as a result of operations of Work under this contract. Restoration shall be of at least equal quality and identical in dimension to original improvement unless specifically specified otherwise.

3.03 INSTALLATION

A. Gravel Surfaced Areas

     1. Where trenches are excavated through gravel surfaced areas such as roads and driveways and other areas, the gravel surface shall be restored by placing road base material upon a prepared subgrade.

     2. Subgrade preparation shall conform to Paragraphs 221.3 and 225.3 of the State of Utah Standard Specifications for Road and Bridge Construction:

          a. Average of field density determinations shall be 95% of the maximum dry density, with no determination lower than 92%.

          b. The maximum dry densities shall be determined in accordance with the following:
               i. A-1 Soils: AASHTO Designation T-180, Method D.
               ii. All other Soils: AASHTO Designation T-99, Method D.

     3. Thickness of road base surface shall be 6 inches or shall match existing, whichever is greater.

     4. Compaction of road base surface shall conform to Paragraph 301.3 of the State of Utah Standard Specifications for Road and Bridge Construction.

B. Asphaltic Concrete Surfaced Areas

     1. Where trenches are excavated through asphaltic concrete surfaced areas such as roads, driveways or parking areas, the surface shall be restored by preparing the subgrade, placing base course(s), placing tack and prime coats, and placing the asphaltic concrete surface course(s).

     2. Subgrade preparation shall conform to applicable parts of Paragraphs 221.3 and 225.3 of the State of Utah Standard Specifications for Road and Bridge Construction:

          a. Average of field density determinations shall be 95% of the maximum dry density, with no determination lower than 92%.

          b. The maximum dry densities shall be determined in accordance with the following:
               i. A-1 Soils: AASHTO Designation T-180, Method D.
               ii. All other Soils: AASHTO Designation T-99, Method D.

     3. Thickness of base course shall be 6 inches, shall match existing, or shall be as required by local authority having jurisdiction, whichever is greater.

     4. Placing and compaction of base course shall conform to applicable parts of Section 301 of the State of Utah Standard Specifications for Road and Bridge Construction, excluding pay factor allowances.

     5. Tack Coat

          a. Tack coat shall be applied at the rate of 0.05 to 0.15 gal/SY. A hand sprayer or brush shall be used to apply tack coat to vertical faces of previously constructed bituminous pavement (over 1/2 hour hence) prior to placing an adjacent or parallel pass, curbs, gutters, slab edges, and all structures to be in actual contact with the bituminous pavement. Tack coat shall also be applied uniformly at the same rate to the horizontal top surface of each lift of bituminous pavement prior to placing the next lift of bituminous pavement to promote a bond between the two courses of pavement. None of the material shall penetrate into the pavement and for this reason the application should be limited.

          b. Prior to applying the material, the surface to be treated shall be swept or flushed free of dust or other foreign material.

          c. Protect all surfaces not required to receive tack coat from any inadvertent application.

          d. The temperature range of the tack coat at the time of application shall be such that the viscosity will be between 50 and 100 centistokes as determined in accordance with ASTM Designation D 2170.

          e. Under no circumstances shall traffic be permitted to travel over the tacked surface. If detours cannot be provided, restrict operation to a width that will permit at least one way traffic over the remaining portion of the roadbed. If one way traffic is provided, the traffic shall be controlled in accordance with governing authority.

          f. After application of tack coat, sufficient time shall be given to allow for complete separation of asphalt and water before paving operations begin. The tack coat shall be applied on only as many surfaces as will be paved against in the same day.

     6. Mixing, placing, spreading and compaction of bituminous surface course shall conform to applicable parts of Section 402 of the State of Utah Standard Specifications for Road and Bridge Construction, excluding pay factor allowances.

C. Concrete Curbs, Gutter, Sidewalks and Driveways

     1. Shall be removed and replaced to the next joint or scoring lining beyond the actually damaged or broken sections; or in the event that joints or scoring lines do not exist or are three or more feet from the removed or damaged section, the damaged portions shall be removed by saw cutting full-depth.

     2. All new concrete shall match, as nearly as possible, the appearance of adjacent concrete improvements. Where necessary, lampblack or other pigments shall be added to the new concrete to obtain the desired results.

     3. Concrete forms shall be true to line and of sufficient strength to ensure against bulging or displacement.

     4. Contraction and expansion joints shall match original construction in placement and size, unless otherwise required by local jurisdiction having authority.


     5. Reinforcement shall be replaced as in original construction, unless otherwise required by local jurisdiction having authority, and shall be installed in accordance with applicable CRSI and ACI Standards.

     6. Finishing and curing shall be in accordance with local jurisdiction having authority.

D Vegetated Areas

     1. Prior to placing sod or other final vegetative cover, examine and repair the subgrade as necessary to assure a smooth and even surface which will match grade and contours of surrounding undisturbed ground. Finish grade construction areas to match grade prior to construction activities. Assure that a positive slope away from all building walls is maintained for at least 10 feet to prevent runoff from approaching walls.

     2. Prepare soil under areas to receive vegetation by placing topsoil to a depth equal to surrounding conditions or to 6", whichever is greater. Disk or till 3 cubic yards manure per 1000 square feet of surface area to a depth of 8 inches.

     3. Roll and rake areas receiving vegetation to smooth, even surface, free of ridges, with loose, uniformly fine texture.

     4. Allow for final vegetation thickness when preparing subgrade.

     5. Restore raked areas to specified condition if eroded or otherwise disturbed after fine grading and prior to placing vegetative cover.

     6. Remove stones over 1 1/2 inches in any dimension and sticks, roots, rubbish, and other extraneous matter.

     7. Limit preparation to areas which will be planted promptly after preparation.

     8. Moisten prepared lawn areas before planting if soil is dry. Water thoroughly and allow surface moisture to dry before sodding. Do not create a muddy soil condition.

E. Trees and shrubs:

     1. Layout individual tree locations.

     2. Secure approval of Engineer and Owner prior to planting.

     3. Excavate tree and shrub pits with vertical sides. Dispose of subsoil removed from landscape excavations. Do not mix with backfill. If tree or shrub is to be planted on excavation area, remove all impervious fill from tree and shrub pit down to pervious material.

     4. Place three Agriform fertilizer tablets evenly around the perimeter of, and immediately adjacent to the root ball at a depth which is between the middle and the bottom of the root ball.

     5. When excavation is approximately 2/3 full, water thoroughly before placing remainder of backfill. Repeat watering until no more is absorbed. Water again after placing final layer of backfill.

     6. Stake or guy trees immediately after planting. Stakes and guys should be evenly distributed around tree. All stakes must be driven so as not to disturb the root ball.

F. Sprinkling Systems:

     1. Restore all sprinkling systems and fences disturbed, removed, or damaged by construction operations in a condition at least equal to that prior to construction.

G. Sodding:

     1. Lay sod to form a solid mass with tightly fitted joints. Butt ends and sides of sod strips; do not overlap. Stagger strips to offset joints in adjacent courses. Work from boards to avoid damage to subgrade or sod. Tamp or roll lightly to ensure contact with subgrade. Work sifted soil into minor cracks between pieces of sod; remove excess to avoid smothering of adjacent grass.

     2. Secure sod on slopes with U-shaped wire clips as required to prevent slippage. Immediately after planting, sod shall be thoroughly watered with a fine spray. Watering shall occur as frequently as needed to keep sod constantly moist for a period of 14 days after planting. Two weeks after planting, apply ammonium sulfate in pellet form at 40 actual pounds of nitrogen per acre. Water thoroughly immediately after fertilizing.

H. Miscellaneous Restoration Items

     1. All other improvements interrupted or removed to permit the construction specified herein shall be restored. Miscellaneous improvements to be restored shall include, but shall not be limited to, the following:

          a. Culverts

          b. Fences

          c. Utilities

3.04 PROTECTION

A. Provide barricades and restrict access as appropriate to prevent damage to Work in place.

B. Contractor shall be responsible for protection of Work in place against displacement, damage, loss or theft until Owner's acceptance. Any Work installed and subsequently damaged, lost or displaced shall be repaired or replaced to the Owner's satisfaction at no additional cost.

C. Planting Maintenance:

     1. Begin maintenance immediately after planting, and continue until inspection and acceptance, in no case less than 30 days from the time of completion of Work.

     2. Maintain trees by pruning, cultivation and weeding as required for healthy growth. Restore planting saucers.

     3. Tighten and repair stake and guy supports and reset trees to proper grades or vertical position as required. Spray as required to keep trees free of insects and disease.

     4. Maintain lawns for not less than 30 days and longer as required to establish an acceptable lawn. To be acceptable, lawn must be past second mowing with no bare spots. Maintain lawns by watering, fertilizing, weeding, mowing, trimming, and other operations such as rolling, regrading and replanting as required to establish a smooth, acceptable lawn, free of eroded or bare areas.

3.05 CLEANING

A. Thoroughly clean, rake, wash and/or flush all restoration Work prior to submitting for Owner's acceptance.