7-02486 Restoration.pdf

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SECTION 02486

RESTORATION

PART I GENERAL

1.1 Restoration involves the repair or replacement of all items disturbed by construction.

Restoration, when complete, should render the disturbed area equal to or better than its original condition prior to construction.

1.2 Restoration under this Contract includes, but is not limited to: driveways, curbs, sidewalks, street signs, lawns, mailboxes, retaining walls, shrubs, bushes and plantings.

The Contractor should include the cost of restoration in his unit cost bid for the appropriate items.

1.3 Contractor shall be responsible to provide new shrubs and bushes should those that are disturbed during construction die.

1.4 The contractor is not to park vehicles on sidewalks, curbs or grass strips. Any damage that occurs is to be restored as described in this section.

PART 2 EXECUTION

2.1 REPLACING PAVING

A. All paving damaged by construction operations shall be replaced in kind and/or repaired as specified herein. All paving damaged beyond limits herein specified, shall be replaced with new paving at the Contractor's expense.

B. Repaving of all Borough roads and streets shall be done in strict accordance with PennDOT Publication 408 and Borough regulations and requirements.

C. Arrangements for the adjustment of manholes, valve boxes and any other such facility shall be made by the Contractor in advance of any paving operations. If the adjustments are not made by the Owners of such facilities, Contractor shall make the adjustments at his expense and shall be considered that he has checked this with the utilities and made allowance for same in his bid.

D. An application of asphalt, suitable to the surface course, shall be provided at all locations where new bituminous paving joints existing bituminous paving and other structures. At required locations, a paving notch, a minimum of one (1) foot width, shall be cut to feather the new paving into the old paving. All joints shall be coated along their vertical face before placement of paving and then sealed over the joint surface after placement of the pavement.

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2.2 LANDSCAPE WORK

A. If sufficient topsoil is not available, the Contractor shall furnish additional topsoil from outside sources.

B. Topsoil shall have a pH of between five (5) and seven (7), shall be friable loam, free of clods of grass or excessive amounts of old roots, or vegetation debris that would require excessive raking after spreading.

C. During all operations following topsoil spreading, surface shall be kept free from stones over one and one-half (1-1/2) inches in size or any rubbish, debris, or other material which will be detrimental to seeding or to maintenance.

D. Lime in form of raw ground limestone shall be applied at a rate of one hundred (100) lbs.

per one-thousand (1000) square ft. of area. At least one (1) full week after lime has been spread, fertilizer shall be spread uniformly at a rate of thirty (30) lbs. per one-thousand (1000) sq. ft. if 5-10-5 is used, or at a rate of twenty (20) lbs. of bone meal and ten (10) lbs. of cotton seed meal per one-thousand (1000) sq. ft. Peat moss shall then be added one-fourth (1/4) inch deep (approximately 643 sq. ft. per large bale). Area shall then be gone over with a spike drag or Rototiller, and hand raked to a smooth even grade.

E. Dependent upon completion date of Project, weather encountered and subject to approval of Engineer, following times for seeding shall be followed:

(1) Spring Seeding

Shall be permitted between 1 April and 15 May, with preliminary operations for seed bed preparation completed as early as 15 March or as ground operations permit.

(2) Fall Seeding

Shall be permitted between 1 September and 10 October, with preliminary operations for seedbed preparation completed as early as 1 August.

F. Seed shall be of finest quality as recommended by local authorities for this location and shall be sown at a rate of eight (8) lbs. per one-thousand (1000) sq. ft., of area, sowing four (4) lbs. in one direction and four (4) lbs. in direction at right angles to first operation.

G. Brush or rake to obtain a light covering of earth over seed, and rake out all stones over one and one-half (1-1/2) inches in size and all other debris. After seed has been raked or brushed in, areas shall be rolled lightly in two (2) directions.

H. All seeded areas shall be kept wet, to a depth of three (3) inches, for ten (10) days

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immediately following seeding. All areas and spots which do not show a prompt catch of grass shall then be reseeded, and this operation repeated until a complete coverage is obtained. When area does not need to be reseeded, it shall be wet, to depth of three (3) inches, every time surface shows evidence of drying out, and this shall continue throughout entire period of maintenance.

I. When average height of grass is about two and one-half (2-1/2) inches, it shall be cut to a height of one and one-half (1-1/2) inches with approved mowing equipment, and at that time, any depressions or other irregularities in lawn surface shall be leveled and reseeded.

Contractor's maintenance shall cease after third cutting, provided all areas are grassed and free from bare spots or large "off color" areas.

2.3 CONCRETE WALKWAYS AND CURBS

A. All concrete for walkways and curbs shall be air-entrained 5-7%, 4” slump + or – 1”, and shall have a 4,000 psi, 28 day design strength. Salt or calcium chloride admixtures are prohibited.

B. Concrete walkways shall be a minimum of four (4) inches in depth, placed over four (4) inches of compacted stone base. Stone base shall be AASHTO #57, clean and free from foreign materials.

C. Concrete curb configuration shall match adjacent curb and be in accordance with Borough specifications.

D. Subgrade shall be prepared and compacted to a minimum of 95% maximum dry density as determined by A.S.T.M. D-698-64T (Standard Proctor). When directed by Engineer, Contractor shall remove and replace unsuitable subgrade material with acceptable material at no additional cost to the Owner. Concrete shall not be placed on any frozen base material or ground.

E. Expansion joint material shall be one-half (1/2) inch pre-molded expansion type and shall be placed between existing and proposed concrete and every twenty (20) linear feet for all new construction. The expansion joint material shall be placed for the full depth of the work.

F. Contractor shall form transverse dummy joints at five (5) foot intervals, approximately one-eighth (1/8) inch wide and at least one (1) inch deep for walkways and ten (10) foot intervals for curb. Contractor shall form outside edges and joints with a one-quarter (1/4) inch radius edging tool.

G. Welded wire fabric reinforcing shall be 6x6 30/30, properly supported above the stone to allow two (2) inches of concrete cover below, and shall be utilized for sidewalk at driveway openings with total concrete thickness of six (6) inches over four (4) inches of compacted stone base.

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H. Curb depressions shall utilize two (2) #4 bars properly supported above the subbase to allow two (2) inches of concrete cover below.

I. Concrete shall be properly cured after each pour and shall not be left exposed and unprotected. All concrete surfaces shall be given a light broom finish.

J. Concrete cylinder tests and slump tests shall be performed by an approved independent testing agency at Contractor’s expense, as directed by the Engineer.

END OF SECTION