02950_Paving_Requirements_2026_(1).pdf

02950-1 2026

STANDARD SPECIFICATIONS

SECTION 02950

PAVEMENT REQUIREMENTS

PART 1 GENERAL

1.1 DESCRIPTION

A. Section includes requirements for removing, replacing and providing new paving for roads, driveways, parking areas, curb and gutter, walks, and paved areas within limits indicated, including subgrade and base courses.

1.2 DEFINITIONS

A. Paved: Covered with gravel, stone, brick, asphalt, concrete, or other material providing a firm, level, or convenient surface for vehicular or pedestrian traffic.

1.3 JURISDICTIONAL REQUIREMENTS

A. Commission utility contracts involve work in roads, parking and paved areas under following jurisdictions:

1. Maryland State Highway Administration (MSHA).

2. Montgomery County Department of Permitting Services.

3. Prince George's County Public Works and Transportation Department.

4. Incorporated municipalities.

5. Other jurisdictions.

B. When working in these areas, remove and replace roads, driveways, parking areas, curb and gutter, walks and other paved areas following specific requirements of the authority having jurisdiction.

1.4 PAVEMENT REPLACEMENT

A. Service Connection Contracts (AC, LC, and SC).

1. Temporary pavement only.

PART 2 PRODUCTS

2.1 MATERIAL

A. Commission Furnished Materials.

1. Pavement Repair Identification Markers.

B. Concrete.

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1. Meet requirements in Section 03300, except where jurisdictional requirements apply.

C. Other Materials.

1. Materials for permanent pavement replacement: Meet latest editions of following jurisdictional requirements:

a. State Roads: MSHA Standard Specifications, Standard Details, and Master

Permits.

b. Montgomery County Roads: Montgomery County Department of Permitting

Services, Specifications for Utility Construction Permit.

c. Prince George's County Roads: Prince George's County Public Works and

Transportation Department Specifications and Standard Details.

1) Material must be obtained from county approved hot mix asphalt plants.

d. Areas not covered above: Follow Right of Way Construction Permit.

2. Calculate tonnage of hot mix asphalt (HMA) required using the following equation:

Quantity (tons) = 1.05* [Area (yd2) * Thickness of Lift (inches)] / 17

The simplified equation is developed from the following equation that involves conservative unit weight estimate and material unit conversions.

Quantity (tons) = Area (yd2) * Thickness of Lift (inches) * (1 yd / 36 inches) * (27 ft3 / 1 yd3) * Unit Weight HMA (#/ft3) * (1 ton / 2000 #) * 1.05

A denominator of 17 in the simplified equation is equivalent to a HMA unit weight of 156.9 lbs/ft3. This value is slightly higher than the historical average for HMA unit weights, but this is designed to be a conservative estimate and it is determined this simplified equation provides an adequate quantity. The equation is multiplied by 1.05 to account for a 5% waste factor.

D. Temporary Pavement Replacement:

1. Hot Mix Asphalt Surface-Fine (SF): Follow MSHA Standard Specifications.

a. When not available, use Engineer approved high performance cold mix asphalt.

2. High Performance Cold Mix Asphalt: Composed of approved suitable aggregate, plant mixed with approved asphaltic liquid blend following blend manufacturer’s specifications.

a. Final mix:

1) Stripping resistance of retained coating minimum 75% when testing to ASTM-D-1664, latest revision.

2) Remain flexible and cohesive to minus fifteen degrees F (-26 degrees C).

3) Homogeneous, free of lumps.

4) Retain its adhesive qualities in wet applications.

5) Approved High Performance Cold Mix Products:

a) National Paving and Contracting, Perma-Patch

b) Seaboard Asphalt Product, Bond-X Green

c) Lafarge North America, QPR

d) RoadStone Production LLC, Aquaphalt

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e) Cold Mix Manufacturing Corp., Green Patch.

f) Unique Paving Materials, High Performance Cold Patch.

g) JASA High Performance Cold Patch (Cold Mix Liquid)

b. Acceptable aggregate: Consist of 10% crushed stone or laboratory approved equivalent under ASTM C-136.

Recommended Gradation:

Sieve Size Percent Passing by Weight 3/8” 90-100% #4 20-55% #8 5-30% #16 0-10% #50 0-5% #200 0-2%

c. Acceptable Liquid Asphaltic Blends:

1) National Paving and Contracting, Co., Perma-Patch Liquid

2) Sylvax Corp., UPM Liquid Asphalt Blend

3) Lafarge North America, QPR Blend

4) Sylcrete Corp., Sylcrete-EV

5) Co-Products Corp., I.A.R.

6) Seaboard Asphalt Product, Bond-X

PART 3 EXECUTION

3.1 PUBLIC NOTIFICATION

A. See Section 01110.

3.2 GENERAL

A. Construction requiring removal and replacement of roads, driveways, parking areas, curb and gutter, walks and paved areas, and new paving: Meet latest editions of jurisdictional requirements listed above in PART 2.

3.3 REMOVAL OF EXISTING PAVEMENT

A. Cut and remove existing pavement in advance of excavating to neat lines following appropriate jurisdictional standard detail utilizing the Commission standard trench widths.

B. Saw cut existing concrete pavement and concrete base course full depth and remove load transfer devices where they exist.

C. Provide temporary walkways and curb and gutter at Engineer’s direction.

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3.4 USE OF STEEL PLATING

A. Whenever Steel plating is required or used during construction within paved roadway:

1. Notify Engineer and authority having jurisdiction at least 48 hours in advance of placing steel plates in roadway.

2. Steel shall conform to current ASTM A36 Standard.

3. Steel plates shall be sized to effectively carry traffic with a maximum 1-inch deflection. Steel plates shall be large enough to allow a minimum of 1 ft of bearing on all four sides of the pavement surrounding the excavation and securely anchored in place using pins.

4. For trench widths less than 5 ft, steel plates shall be at least 1-inch thick. For trench widths equal to or greater than 5 ft, steel plates and support system shall be designed and stamped by a Professional Engineer licensed in the State of Maryland and approved by WSSC.

5. Placement: Steel plates must be recessed as specified herein and any jurisdictional requirements must be followed. Mill the pavement to a depth equal to the thickness of the plate and to a width and length equal to the dimension of the plate. Ensure top of steel plate is level with the roadway. Mill or saw cut pavement perpendicular to the traffic to ensure edge of plate meets smooth vertical face of cut to prevent lateral plate movement. Cold patch shall be used ensure proper seating of plates and /or fill any gaps.

6. The Engineer may allow alternative bearing requirements for steel plates when bearing on all sides of the trench is impractical or emergency arise. Any alternative desired must be approved by WSSC. Submit drawings depicting desired alternative and methodology noted to be utilized for approval.

7. Steel plates abutted edge to edge can be welded together and anchored with pins on the four (4) outermost corners. Additional pins shall be spaced as necessary to assure the steel plates are secured. No corner of any steel plate shall overhang the excavated trench.

8. If it is not practical to recess the steel plate as required herein, cold mix asphalt must be tapered from the height of the steel plate to the existing road surface for a minimum distance of one foot (1’) ramping at 18:1 slope.

9. Taper cold mix asphalt on all edges of steel plate from height of steel plate extending minimum of 1 foot to existing road surface.

10. During months when snowfall may be expected, mark steel plates with 2 inch square stake painted per regulatory district and extending at least 4 feet above ground, placed adjacent to edge of roadway.

11. Contractor will be charged for cost of corrective measures required if jurisdictional or Commission forces must correct emergency condition due to excavation and/or plate placement.

12. Monitor steel plates at least once a day. Promptly repair and maintain steel plates until they are removed.

13. Unless otherwise approved by Engineer, remove steel plates from service in 7 calendar days or less.

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3.5 PREPARATION FOR PAVEMENT REPLACEMENT

A. Compact Trench Backfill following Section 02315.

B. Provide temporary or permanent pavement immediately upon completion of backfill.

3.6 TEMPORARY PAVEMENT

A. Place temporary pavement as specified herein except where otherwise required by jurisdictional requirements.

1. Place and compact hot mix asphalt bituminous concrete mix minimum thickness of 3 inches and at same grade as surrounding surface on Trench Backfills required in Section 02315 for Type I areas under existing paving.

2. When approved by Engineer for use, place and compact high performance cold mix asphalt minimum thickness of 3 inches and at same grade as surrounding surface on Trench Backfills required in Section 02315 for Type I areas under existing paving.

a. Stockpiling of high performance cold mix asphalt will be permitted provided it is stored in manner to prevent infiltration of deleterious material and not longer than 1 month from date of mixing.

b. Compact high performance cold mix asphalt using uniform tamping equipment.

3. Provide hot mix asphalt for temporary curb and gutter, walks, and driveways.

4. Mark temporary pavement repairs in all roads with blue paint for water or water and sewer, and green paint for sewer in 4 inch high letters to read WSSC-S for Systems Construction or WSSC-F for Facilities Construction.

5. Temporary pavement: Remain in place maximum of 60 days, unless jurisdictional requirements are more stringent.

a. If approved suppliers of permanent paving are unavailable due to wintertime shutdown, allotted time period will be extended to include shutdown period, upon written request to Engineer.

6. Maintain temporary pavement in condition acceptable to Engineer, or authority having jurisdiction until permanent pavement is placed.

7. If temporary pavement becomes defective and creates an emergency, commence repair to rectify situation within 1 hour after notification by Engineer or Engineer may arrange to have Work performed by others and deduct costs of corrective measures from monies owed Contractor.

8. Resulting patch must be a smooth and level surface flush with existing pavement.

3.7 PERMANENT PAVEMENT

A. Dimensions: Follow jurisdictional requirements.

1. If pavement has been undermined, damaged, or disturbed by Contractor's operations, increase extent of repaving so that new pavement and base extends at least 18 inches over undisturbed soil.

2. Install pavement repair identification markers in each repair and every 50 feet in longitudinal repairs.

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B. Bituminous Concrete Overlay:

1. Place bituminous concrete overlay to limits and depth specified in Drawings, trench details and Right of Way Construction Permit.

2. Pavement replacement for trenches to be overlaid: Follow standard jurisdictional requirements or as specified below.

C. Milling and Bituminous Concrete Overlay:

1. Mill and place bituminous concrete overlay to limits and depth specified following jurisdictional requirements.

2. Pavement replacement for trenches to be overlaid: Follow standard jurisdictional requirements or as specified below.

D. Bituminous Concrete Pavement Replacement:

1. Prime coat cut surfaces to receive asphalt patch and between each new layer of asphalt.

a. Clean surface of loose and foreign materials.

b. Apply under pressure: Uniformly, at rate of 0.01 to 0.05 gallons per square yard of area.

c. Apply prime coat to all vertical surfaces taking care to maintain a neat appearance at all curb and gutter interfaces.

2. Bituminous Concrete: Follow jurisdictional requirements.

3. Resulting patch must be a smooth and level surface flush with existing pavement.

E. Concrete Pavement Replacement:

1. Replace load transfer devices where removed.

2. Place concrete pavement following jurisdictional requirements.

3. Place expansion joints at 40 feet on center, maximum, or space to match existing joints, whichever is less.

F. Shoulder Replacement:

1. Replace disturbed shoulder areas with type of material existing before disturbance, following appropriate jurisdictional requirements.

2. Reuse of gravel or aggregate material may be permitted with Engineer’s approval, provided gravel or aggregate is removed and stockpiled separately, and is not infiltrated with foreign material.

G. Curb and Gutter Replacement:

1. Do not tunnel concrete and asphalt curbs without Engineer’s approval.

2. Replace curb and gutter following jurisdictional requirements.

3. When curb replacement is required within 4 feet of construction joint, extend replacement to joint.

H. Walkway Replacement:

1. Remove and replace entire sidewalk square affected.

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2. Space joints to match existing surrounding sidewalk.

I. Driveway and Other Replacement:

1. Driveways in State or County Rights-of-way: Replace following applicable jurisdictional requirements.

2. Unless otherwise shown on Drawings, replace driveways at other locations and other paved areas in kind.

3. Remove and replace entire section of affected asphalt driveway from edge to edge.

The repair should extend not less than 18” past the edge of the original pavement cut or to the nearest joint if the joint is within five (5) feet of the pavement cut.

4. Remove and replace entire section of affected concrete driveway from joint to joint.

PART 4 MEASUREMENT AND PAYMENT

4.1 ROADWAY PAVEMENT REPLACEMENT

A. Measurement: By ton following Commission standard trench widths measured horizontally along trench centerline and following requirements of authority having jurisdiction including but not limited to cutbacks and paving between curbs and trench.

Permanent patching will not be paid for if installed prior to completion of all house connections and tie-ins in that section of roadway. Temporary patching shall be used until connections and tie-ins are complete.

B. Payment: At unit price listed in Bid Schedule.

1. Payment includes excavation and disposal of existing and temporary pavement.

4.2 BITUMINOUS CONCRETE OVERLAY

A. Measurement: By ton, following requirements of authority having jurisdiction.

B. Payment: At unit price for each ton listed in Bid Schedule.

1. Payment includes labor, material, and equipment to provide bituminous concrete overlay specified herein.

4.3 MILLING AND BITUMINOUS CONCRETE OVERLAY

A. Measurement: By ton, following requirements of authority having jurisdiction.

B. Payment: At unit price for ton listed in Bid Schedule.

1. Payment includes labor, material, and equipment to provide milling and bituminous concrete overlay specified herein.

4.4 TEMPORARY HOT BITUMINOUS CONCRETE TO REPLACE COLD PATCH IN

MARYLAND STATE HIGHWAY ADMINISTRATION ROADWAYS

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A. Measurement: By ton following Commission standard trench widths measured horizontally along trench centerline.

B. Payment: At fixed contingent unit price for each ton listed in Bid Schedule.

Payment includes removal of temporary cold mix, labor, material and equipment to provide hot bituminous concrete patch as specified herein.

4.5 CONCRETE FOR SIDEWALK AND DRIVEWAY REPLACEMENT

A. Measurement: By cubic yard following requirements of authority having jurisdiction.

B. Payment: At unit price listed in Bid Schedule.

1. Payment includes labor, material and equipment to provide concrete replacement.

4.6 CONCRETE PAVEMENT REPLACEMENT FOR STATE OR NON-STATE ROADS

A. Measurement: By cubic yard following requirements of authority having jurisdiction.

C. Payment: At unit price listed in Bid Schedule.

1. Payment includes labor, material and equipment to provide concrete replacement.

**WSSC**