B08_Attach_2_Specifications__Div_2_through_49_02-2026.pdf

Congaree National Park Cowpens National Battlefield

Kings Mountain National Military Park Ninety-Six National Historic Site

STATE OF SOUTH CAROLINA

SC192 PAVEMENT PRESERVATION (DD-CD’S)

CONG COWP KIMO NISI

334914 334929 334920 334915

PROJECT SPECIFICATIONS

NATIONAL PARK SERVICE (NPS)

DENVER SERVICE CENTER (DSC)

February 2026

NPS DSC Divisions 2 through 49 Specifications page 2 of 2

SC192 – 334914, 334929, 334920, 334915

NPS DSC Divisions 2 through 49 Specifications Table of Contents

National Park Service (NPS) - Denver Service Center (DSC) | 1-28-22

DIVISION 02 Existing Conditions 02 41 00 Selective Demolition (Paving Removal)

DIVISION 10 Specialties 10 14 53 Traffic Signage

DIVISION 31 Earthwork 31 23 10 Excavation & Backfill

DIVISION 32 Exterior Improvements 32 01 11.53 Paint Removal From Paving 32 01 16.71 Cold Milling Asphalt Paving 32 01 17.61 Sealing Cracks in Asphalt Paving (Crack Seal) 32 11 23 Aggregate Base Course 32 12 13.13 Asphaltic Tack Coats 32 12 16 Asphalt Pavement – Standard (9.5mm / 12.5mm / 19.0mm) 32 12 36 Seal Coat 32 16 13.13 Curb Replacement (Cast-In-Place Concrete Curb & Gutter) 32 17 23 Painted Pavement Markings 32 31 11 Traffic Loops 32 91 19.14 Aggregate Topsoil Course

DIVISION 34 Transportation 34 01 00 Maintenance of Traffic

THIS PAGE LEFT BLANK INTENTIONALLY

DIVISION 02

EXISTING CONDITIONS

SECTION 02 41 00 – SELECTIVE DEMOLITION

PART 1 - GENERAL

1.1

A.

B.

C.

SUMMARY

Furnish labor, materials, tools, equipment, and services for removal of concrete, asphalt pavement, curbs, curb stops, and signage (including incidental reinforcement, fasteners and foundations) as indicated on the drawings and in accordance with provisions of Contract Documents.

Completely coordinate with work of other trades.

Work Includes:

1. Demolition and removal of asphalt, concrete, and miscellaneous curb, curb stops, and signage of roadways and parking lots.

2. Containment & Removal of debris.

1.2

A.

B.

C.

1.3

A.

B.

QUALITY ASSURANCE

Conduct work in accordance with OSHA and EPA requirements.

National Fire Protection Association (NFPA):

1. NFPA 241 Standards for Safeguarding Construction, Alteration, and Demolition Operations.

Design, engineering, and construction of containment system for shotcrete removal, bracing, temporary supports, and debris containment control measures are responsibility of Contractor.

JOB CONDITIONS

Perform preliminary site investigations prior to submitting a bid proposal to ascertain extent of work.

1. Conditions apparent by investigation shall not be allowed as claim for extra cost.

Obtain and pay for permits that may be required by authorities having jurisdiction and notify interested utilities companies prior to commencement of activities.

SC192 – 334914, 334929, 334920, 334915 02 41 00 - 1

SELECTIVE DEMOLITION

PART 2 - PRODUCTS – NOT USED

PART 3 - EXECUTION

3.1

A.

GENERAL DEMOLITION PROCEDURES

Miscellaneous Demolition:

1. Remove timber curb, rubber curb stops, and signage as indicated on plans. All materials shall be removed from the site and disposed in accordance with all local, state and federal regulations.

B. Demolition Of Pavements, Slabs and Walks:

1.

2.

Remove miscellaneous concrete items as shown on plans. Where concrete to be removed abuts concrete to remain, pavement shall be uniformly saw-cut along an existing joint.

Jagged or crooked edges will not be acceptable.

Remove miscellaneous asphalt items as shown on plans including but not limited to:

asphalt paved roads, parking lots, walks, curbs and miscellaneous asphalt. Cuts between pavement to be removed and pavement to remain shall be saw-cut to full depth, straight, smooth, and clean with no jagged edges. Asphalt shall be broken up, hauled, and disposed off-site. All recyclable materials shall be hauled to nearest recycling center and any non-recyclable materials shall be hauled to an approved Disposal Site designated by the CO.

C. Existing Concrete and Asphalt Removal:

1.

2.

Existing roadway materials shall be pulverized, maintained on-site for re-use as fill to raise existing grades immediately under the proposed roadway.

Asphalt and concrete removed not intended for re-use either for recycled asphalt pavement or pulverized for fill, shall be removed from the site and disposed in accordance with all local, state and federal regulations.

D. Conduct operations to ensure minimum interference with roadway and adjacent facilities.

1. Do not obstruct or close roadway, adjacent pullouts and shoulders without CO approval.

E.

F.

3.2

A.

All demolition activities shall prevent demolition materials and any other debris from entering the waterways.

Provide barricades and safety lights as required.

PROTECTION OF FACILITIES TO REMAIN

Protect all site facilities designated to Remain:

1. Conduct operations to prevent damage to roadway and by falling debris or other cause to structures, and other facilities as well as persons. Contractor to submit methods of debris containment for approval

SC192 – 334914, 334929, 334920, 334915 02 41 00 - 2

3.3

A.

CLEAN-UP AND DISPOSAL OF DEMOLITION MATERIALS

Remove debris, rubbish, and materials resulting from demolition operations.

1.

2.

Remove and legally dispose of off-site.

Do not burn materials on site.

B. Dispose of items and materials not designated for salvage or reuse.

1.

2.

Promptly remove from site.

Do not store or sell Contractor salvaged items or materials on site.

C.

D.

Clean adjacent improvements of dust, dirt, and debris caused by demolition operations.

Return adjacent areas to condition existing prior to start of work.

END OF SECTION 02 41 00

SC192 – 334914, 334929, 334920, 334915 02 41 00 - 3

DIVISION 10

SPECIALTIES

SC192 – 334914, 34929, 34920, 334915 10 14 53 - 1

TRAFFIC SIGNAGE

SECTION 10 14 53 – TRAFFIC SIGNAGE

PART 1 – GENERAL

1.1 DESCRIPTION

A. This work consists of constructing permanent traffic control signs and removing and resetting permanent traffic control devices.

PART 2 – PRODUCTS

2.1 MATERIALS

A. Aluminum Panels. Conform to ASTM B 209, alloy 6061-T6 or 5052-H38.

Fabricate all temporary panels and those permanent panels that are 30 by 30 inches or smaller from 0.080-inch thick aluminum sheets. Fabricate larger permanent panels from 0.125-inch-thick aluminum sheets.

The blanks shall be free from laminations, blisters, open seams, pits, holes, or other defects that may affect their appearance or use. The thickness shall be uniform, and the blank shall be commercially flat. Perform shearing, cutting, and punching before preparing the blanks for reflective material application.

Clean, degrease, and chromate the blanks, or otherwise properly prepare the panels, according to the methods recommended by the sheeting manufacturer.

B. Signposts. Furnish wood, steel, or aluminum signposts as specified.

1. Wood posts. Furnish posts from dry no. 1 grade Douglas fir, southern or Ponderosa pine, hemlock, spruce, or western larch conforming to AASHTO M

168. Treat the posts with a water-borne preservative, ACA or ACZA, or in accordance with AWPA Standard C14, except that the minimum preservative retention is 0.40 pounds per cubic foot.

C. Hardware. For lag screws, washers, clip angles, wood screws, shear plates, U-bolts, clamps, bolts, nuts, and other fasteners, use galvanized steel or aluminum alloy.

High-strength steel bolts, nuts, and washers conform to AASHTO M 164 or M 253.

Galvanize steel hardware in accordance with AASHTO M 232.

For aluminum alloy bolts, nuts, and washers, conform to Specifications for Aluminum Structures.

SC192 – 334914, 34929, 34920, 334915 10 14 53 - 2

Furnish oversize bolt heads and oversize neoprene or nylon washers for plastic sign panels.

D. Sign panels are designated as aluminum

Sign retroreflective sheeting type conforms to ASTM D 4956 Supplemental Requirement S1, Fungus Resistance, if specified. For reboundable retroreflective sheeting, conform to ASTM D 4956, including Supplemental Requirement S2, Reboundable Sheeting Requirements.

When an adhesive is used, use ASTM D 4956, backing class 1, 2, or 3

E. New wood signposts in CONG will be painted Terra Brun (SW 6048 or similar), with the backs of the signs painted to match.

F. New signposts in COWP, KIMO, and NISI will be painted in NPS Brown MP63848 (See 10 14 53-5), with the backs of the signs painted to match.

PART 3 – EXECUTION

3.1 CONSTRUCTION REQUIREMENTS

A. General

1. Furnish traffic control devices according to the MUTCD and Standard Highway Signs published by FHWA. Submit the sign list for approval before ordering.

B. Supports

1. Sign locations may be changed to fit field conditions as approved by the Contracting Officer (CO). Determine sign support lengths at the time of staking.

Install supports plumb according to the manufacturer's instructions. Make all supports within the clear zone crashworthy.

2. Drive posts with a suitable driving head or set posts in drilled or punched holes.

Replace all damaged posts.

3. Construct concrete footings. Excavate and backfill.

a) Place backfill in horizontal layers that, when compacted, do not exceed 6 inches in depth. Compact each layer according to (b) below.

Bring backfill up evenly on all sides of the structure and extend each layer to the limits of the excavation or to natural ground.

SC192 – 334914, 34929, 34920, 334915 10 14 53 - 3

Do not place backfill against concrete less than 7-days-old or until 80 percent of the design strength is achieved.

b) Compact material is placed in all layers to at least 95 percent of the maximum density. Determine the in-place density and moisture content according to AASHTO T 310 or other approved test procedures.

Do not apply density requirements as measured by AASHTO T 310 to material that is incapable of being tested or compacted to maximum values determined by AASHTO T 99. For these materials, fill the voids around the rock in each layer with earth or other fine material. Compact each layer, full width, until there is no visible evidence of further consolidation.

C. Panels

1. Use type III, VII, VIII, or IX retroreflective sheeting. For permanent sign panels, use type L-1 letters, numerals, arrows, symbols, and borders. Cut panels to size and shape and drill or punch all holes. Make panels flat and free of buckles, warp, dents, cockles, burrs, and other defects.

2. Clean and degrease the face of metal panels using methods recommended by the retroreflective sheeting manufacturer. Abrade, clean, and degrease the face of the plywood panels using methods recommended by the retroreflective sheeting manufacturer. Treat the edges of the plywood panel with an approved edge sealant. Apply the retroreflective sheeting material to the panels. Package sign panels in protective material and transport them in a vertical position.

3. Mount sign panels with the legend horizontal. Where multiple panels adjoin, limit the gap between adjacent panels to 1/16 inch. To reduce specular glare (mirror reflection), turn the sign panel 3 degrees away from the road in the direction of travel

4. Use oversized bolt heads and neoprene or nylon washers for fastening plastic sign panels.

5. Do not field drill holes in any part of the panel. Use anti-theft fasteners where possible. Paint all bolt heads, screw heads, and washers that are exposed on the sign face. Match the paint color to the background or message area color at the point where the fitting is exposed.

SC192 – 334914, 34929, 34920, 334915 10 14 53 - 4

6. If a sign message is not applicable, completely cover the face of the sign with an opaque material. Maintain the covering in good condition until the message becomes applicable. Do not use adhesive tape on the sign face.

7. Repair or replace damaged parts, including sheeting.

D. Removing and Resetting Permanent Traffic Control Devices

1. Remove and store the existing signs, delineators, and object markers. Replace all devices, posts, and hardware that are damaged during removal, storage, or raising.

E. Acceptance

1. Material (including signs, panels, retroreflective sheeting, supports, delineators, object markers, and hardware) for traffic control devices will be evaluated under Subsections 01 90 00.

2. Installation of traffic control devices will be evaluated under Subsections 01 40 00, 01 90 00, and 34 01 00.

SC192 – 334914, 34929, 34920, 334915 10 14 53 - 5

END OF SECTION 10 14 53

DIVISION 31

EARTHWORK

SECTION 31 23 10 – EXCAVATION AND BACKFILL

1.1

A.

1.2

RELATED DOCUMENTS

Drawings and general provisions of the Contract, including General Conditions and Division 01 Specification Sections, apply to this Section.

SUMMARY

and Supplementary

A. Section Includes:

1. Earthwork - excavation, backfilling, compaction, disposal of waste and surplus materials, placing structural fill, placing crushed stone, placing surface course, shoring, bracing, and other Earthwork related work.

B. Related Specification Sections include but are not necessarily limited to:

1. Division 31 25 00 – Erosion and Sediment Control.

1.3

A.

QUALITY ASSURANCE

Referenced Standards:

1. ASTM International (ASTM):

a.

b.

C33, Standard Specification for Concrete Aggregates.

D698, Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort (12,400 FT-LBF/CU FT).

c. D1241, Standard Specification for Material for Soil-Aggregate Subbase, Base, and Surface Courses.

d. D1557, Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 FT-LBF/CU FT(2,700 kN-m/m)).

e. D2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System).

f. D3786, Standard Test Method for Bursting Strength of Textile Fabrics-Diaphragm Bursting Strength Tester Method.

g. D4253, Standard Test Methods for Maximum Index Density and Unit Weight of Soils Using a Vibratory Table.

h. D4254, Standard Test Methods for Minimum Index Density and Unit Weight of Soils and Calculation of Relative Density.

i. D4632, Standard Test Method for Grab Breaking Load and Elongation of Geotextiles.

31 23 10 - 1

EXCAVATION AND BACKFILL

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

a. M 43, Standard Specification for Sizes of Aggregate for Road and Bridge

Construction.

b.

c.

M 57, Standard Specification for Materials for Embankment and Subgrades.

M 147, Standard Specification for Materials for Aggregate and Soil-Aggregate Subbase, Base, and Surface Courses.

B. Federal Regulations:

1. Occupational Safety and Health Administration (OSHA):

a. 29 CFR Part 1926.650, Occupational Safety and Health Standards, referred to herein as OSHA Standards.

1.4

A.

B.

DEFINITIONS

Contracting Officer (CO): Individual designated and authorized in writing to perform specific technical or Administrative Functions.

Excavation:

1.

2.

Consists of removal of material encountered to subgrade elevations required or indicated.

Includes excavation of soils; pavements and other obstructions visible on surface;

underground structures, utilities, and other items indicated to be demolished and removed;

boulders; and rock.

C. Foundations: Footings, base slabs, foundation walls, and any other support placed directly on soil or rock.

D. Non-Structural Fill/Backfill: Soil materials placed and compacted to achieve finish grade elevations that do NOT support foundations, slabs, paving, or other flatwork.

E.

F.

G.

Structure: Bridges, foundations, slabs, tanks, curbs, or other man-made stationary features occurring above or below ground surface.

Subgrade: The earth or soil layer immediately below foundation bearing elevation, subbase material, fill material, backfill material, or topsoil materials.

Unauthorized Excavation:

1. Consists of removal of materials beyond indicated subgrade elevations or dimensions without specific direction of CO.

a. Unauthorized excavation, as well as associated remedial work as directed by CO, shall be at Contractor’s expense.

H.

1.5

Unsuitable Soil Materials: Soil materials encountered at or below subgrade elevation of insufficient strength and stiffness to support construction as determined by the CO.

SUBMITTALS

31 23 10 - 2

EXCAVATION AND BACKFILLSC192 – 334914, 334929, 334920, 334915

A. Product Data:

1.

2.

3.

4.

Acknowledgement that products submitted meet requirements of standards referenced.

Manufacturer's installation instructions.

Certifications.

Test reports.

a.

b.

c.

Report and certification of materials.

Test reports on borrow material.

Certification that all imported material is weed free.

d. Verification of suitability of each material, in accordance with specified requirements.

B.

e.

f.

g.

Samples:

Field reports; in-place soil density and moisture tests.

One optimum moisture-maximum density curve for each type of soil encountered.

Report of actual unconfined compressive strength and/or results of bearing tests of each strata tested.

1. Coordinate samples and testing for approval of off-site materials with the CO.

1.6

A.

PROJECT CONDITIONS

Dispose of waste materials, legally, off site.

1. Burning and burying, as a means of waste disposal, is not permitted.

PART 2 - PRODUCTS

2.1

A.

MATERIALS

Backfill:

1.

2.

Selected material approved from site excavation or from off-site borrow. Alternative South Carolina DOT backfill materials that meet the their gradation and property requirements can be submitted to the CO for approval.

Backfill:

a. Structural Backfill

1) 2)

Free of organic matter, frozen material and debris.

Properties:

a) For material passing the No. 4 sieve, the liquid limit must not exceed

35 (as determined by AASHTO T89), and the plasticity index must not exceed 6.

3) Gradation:

b. Surface course aggregate

NACE 325019 31 23 10 - 3

041423 EXCAVATION AND BACKFILL

SIEVE SIZE

% PASSING

2 INCH 100

NO. 4 30-100

NO. 50 10-60

NO. 200 5-20

1)

2)

Furnish hard, durable particles or fragments of crushed stone, crushed slag, or crushed gravel conforming to the following:

Properties:

a) b) c) d)

e) f) g)

Liquid limit must not exceed 35 (as determined by AASHTO T89).

Plasticity index shall be 6 (AASHTO T90).

Los Angeles abrasion must not exceed 50% (AASHTO T96) Soundness of aggregate using sodium sulfate must not exceed 12% loss (AASHTO T104, 5 cycles).

Durability index (coarse) must not be less than 35 (AASHTO T210).

Durability index (fine) must not be less than 35 (AASHTO T210).

Free of organic matter, frozen material and debris.

3) Gradation:

c.

() The value in the parentheses is the allowable deviation (+/-) from the target values.

Washed Drain Rock 1) 2) 3)

B. Filter Material:

Free of organic matter, frozen material and debris.

Material shall be washed.

Gradation:

1. Free draining sand, gravel, slag, or crushed stone.

PART 3 - EXECUTION

3.1

A.

PROTECTION

Erosion Control:

1.

NACE 325019

041423

See Specification Sections 01 57 23 and 31 25 00.

31 23 10 - 4

EXCAVATION AND BACKFILL

SIEVE SIZE % PASSING

1 INCH 100

½ INCH 70-80 (5)

NO. 4 40-50 (7)

NO. 10 25-40 (6)

NO. 40 15-25 (5)

NO. 200 8.0-14.0 (4)

SIEVE SIZE % PASSING

2 INCH 100

NO. 4 30-100

NO. 50 10-60

NO. 200 5-20

2.

3.

Clean paved roadways daily of any spillage of dirt, rocks or debris from vehicles and equipment entering or leaving site.

Conduct work to minimize erosion of site. Remove eroded material washed off site.

a. If necessary or requested by CO, construct stilling areas to settle and detain eroded material.

B. Protect existing surface and subsurface features on-site and adjacent to site as follows:

1.

2.

3.

Provide barricades, coverings, or other types of protection necessary to prevent damage to existing items indicated to remain in place.

Protect and maintain bench marks, monuments or other established reference points and property corners.

a. If disturbed or destroyed, replace at own expense to full satisfaction of CO and controlling agency.

Verify location of utilities.

a. Omission or inclusion of utility items does not constitute nonexistence or definite location.

b.

c.

Secure and examine local utility records for location data.

Take necessary precautions to protect existing utilities from damage due to any construction activity.

1) If utilities are indicated to remain in place, provide adequate means of support and protection during earthwork operations.

2) Do not interrupt existing utilities serving facilities occupied by CO or others, during occupied hours, except when permitted in writing by CO and then only after acceptable temporary utility services have been provided.

3) Obtain CO’s approval prior to disconnecting any utility service.

d.

e.

Repair damages to utility items at own expense.

In case of damage, notify CO at once so required protective measures may be taken.

4.

5.

6.

7.

Maintain free of damage, existing sidewalks, structures, and pavement, not indicated to be removed.

a. Protect new and existing structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by earthwork operations.

b. Any item known or unknown or not properly located that is inadvertently damaged shall be repaired to original condition.

c. All repairs to be made and paid for by Contractor.

Provide full access to public premises, sidewalks and other points (unless noted otherwise on the plans) as designated by CO to prevent serious interruption of travel.

Maintain stockpiles and excavations in such a manner to prevent inconvenience or damage to structures on-site or on adjoining property.

Avoid surcharge or excavation procedures which can result in heaving, caving, or slides.

C. Protection of trees to remain:

1.

2.

NACE 325019

041423

Perform careful excavation within dripline of large trees designated on Drawings to remain. Protect root systems from damage or dry out to the greatest extent possible.

Trees within 10’ of Limit of Work (LOW) to be protected with temporary fence/snow fence or otherwise as required by the CO.

31 23 10 - 5

EXCAVATION AND BACKFILLSC192 – 334914, 334929, 334920, 334915

3.2

EXCAVATION, FILLING, AND BACKFILLING FOR STRUCTURES

General:

1.

2.

In general, work includes, but is not necessarily limited to, excavation for structures and retaining walls, removal of underground obstructions and undesirable material, backfilling, filling, and fill, backfill, and subgrade compaction.

Obtain fill and backfill material necessary to produce grades required.

a.

b.

Materials and source to be approved by the CO.

Excavated material approved by CO may also be used for fill and backfill.

3. In the paragraphs of this Specification Section, the word "soil" also includes any type of rock subgrade that may be present at or below existing subgrade levels.

B. Excavation Requirements for Structures:

1. General:

a. Do not commence excavation for foundations for structures until CO approves:

1) The removal of topsoil and other unsuitable and undesirable material from

2.

existing subgrade.

2) Density and moisture content of site area compacted fill material meets requirements of specifications.

b. CO grants approval to begin excavations.

Dimensions:

a.

b.

Excavate to elevations and dimensions indicated or specified.

Allow additional space as required for construction operations and inspection of

3.

foundations.

c. Slope sides of excavations to comply with local codes, ordinances, and requirements of agencies having jurisdiction.

d. Maintain sides and slopes of excavations in safe condition until completion of backfilling.

Removal of obstructions and undesirable materials in excavation includes, but is not necessarily limited to, removal of old foundations, existing construction, unsuitable subgrade soils, expansive type soils, and any other materials which may be concealed beneath present grade, as required to execute work indicated on Contract Drawings.

a. If undesirable material and obstructions are encountered during excavation, remove material and replace as directed by the CO.

b. Remove unsuitable subgrade soils located below foundations. The bottom of the over excavation shall be located outside the exterior limits of foundations around the perimeter of structure the following horizontal distance, whichever is greater:

1) 2) 3)

Distance equal to depth of over excavation below bottom of foundations.

5 FT.

As directed by CO.

c. When excavation has reached required subgrade elevations, notify CO, who will

4.

NACE 325019

041423 make an inspection of conditions.

1) If CO determines that bearing materials at required subgrade elevations are unsuitable, provide Subgrade Stabilization as specified herein.

Construction traffic:

a. Construction traffic not allowed on native soils to avoid soil disturbance unless approved by the CO.

b. Repair disturbed subgrade soils prior to placing fill or construction work as directed by CO.

31 23 10 - 6

5.

6.

7.

Proof-roll all subgrades to receive fill or concrete placement after subgrade has been scarified and compacted.

a. Proof-roll in the presence of CO with a fully-loaded tandem axle dump truck or other equipment with a minimum gross weight of 25 tons as approved by the CO.

Install working surface over approved subgrade (if applicable).

a. Minimum thickness 12 in.

Level off bottoms of excavations to receive foundations, pavement, or compacted fill (if applicable).

a. Remove loose materials and bring excavations into approved condition to receive hot mixed asphalt, concrete, or fill material.

b. Where compacted fill material must be placed to bring subgrade elevation up to underside of construction, scarify existing subgrade upon which fill material is to be placed to a depth of 6-inches and then compact to density stated in this Specification Section before fill material can be placed thereon.

c. Do not carry excavations lower than shown for foundations except as directed by the CO.

d. If any part of excavations is carried below required depth without authorization, notify CO and correct unauthorized excavation as directed. Corrections may include:

1) Under soil supported footings, foundation bases, or retaining walls, fill unauthorized excavation as approved by the CO.

a) Concrete fill may be used to bring elevations to proper position.

2) In locations other than those above, including slabs on grade, backfill and

8.

9.

10.

NACE 325019

041423 compact unauthorized excavations as specified for authorized excavations of same classification, unless otherwise directed by CO.

3) No extra compensation will be made to Contractor for correcting unauthorized excavations.

Make excavations large enough for working space, forms, and inspection.

Notify CO as soon as excavation is completed in order that subgrades may be inspected. a.

Do not commence further construction until subgrade under compacted fill material, under foundations, under floor slabs-on-grade, and under retaining wall footings has been inspected and approved by the CO as being free of undesirable material, being of compaction density required by this specification, and being capable of supporting the allowable foundation design bearing pressures and superimposed foundation, fill, and building loads to be placed thereon.

b. CO shall be given the opportunity to inspect subgrade below fill material both prior to and after subgrade compaction.

c. Place fill material, foundations, retaining wall footings, slabs-on-grade, as soon as weather conditions permit after excavation is completed, inspected, and approved and after forms and reinforcing are inspected and approved.

d. Before concrete or fill material is placed, protect approved subgrade from becoming loose, wet, frozen, or soft due to weather, construction operations, or other reasons.

Subgrade stabilization:

a. If subgrade under foundations, fill material, slabs-on-grade, in a frozen, loose, wet, or soft condition before construction is placed thereon, remove frozen, loose, wet, or soft material and replace with approved compacted material as directed by CO.

b. Provide compaction density of replacement material as stated in this Specification Section.

c. Loose, wet, or soft materials, when approved by CO, may be stabilized by a compacted working mat of well graded crushed stone.

31 23 10 - 7

d. Compact stone mat thoroughly into subgrade to avoid future migration of fines into the stone voids.

e.

f.

g.

Remove and replace frozen materials as directed by CO.

Method of stabilization shall be performed as directed by CO.

Do not place further construction on the repaired subgrades, until the subgrades have

11.

12.

been approved by the CO.

Protection of structures:

a. Prevent new and existing structures from becoming damaged due to construction operations or other reasons.

b. Prevent subgrade under new and existing foundations from becoming wet and undermined during construction due to presence of surface or subsurface water or due to construction operations.

Shoring:

a. All excavation, trenching, and related sheeting, bracing, etc. shall comply with the requirements of OSHA standards 29 requirements.

CFR Part 1926.650 Subpart P, and state b.

c.

Shore, slope, or brace excavations as required to prevent them from collapsing.

Remove shoring as backfilling progresses but only when banks are stable and safe

13.

from caving or collapse.

Drainage:

a. Control grading around structures so that ground is pitched to prevent water from running into excavated areas or damaging structures.

b. Maintain excavations where fill materials are to be placed free of water.

c. Provide pumping required to keep excavated spaces clear of water during construction.

d. Should any water be encountered in the excavation, notify CO.

e. Provide free discharge of water by trenches, pumps, wells, well points, or other

14.

means as necessary and drain to point of disposal that will not damage existing or new construction or interfere with construction operations.

Frost protection:

a. Do not place foundations, slabs-on-grade, equipment support pads, or fill material on frozen ground.

b. When freezing temperatures may be expected, do not excavate to full depth indicated, unless foundations, slabs, or fill material can be placed immediately after excavation has been completed and approved.

c. Protect excavation from frost if placing of concrete or fill is delayed.

C. Filling and Backfilling Outside of Structures.

1. This paragraph of this Specification applies to fill and backfill placed outside of structures above bottom level of both foundations and piping but not under paving.

2.

3.

Provide material as approved by CO for filling and backfilling outside of structures.

Fill and backfill placement:

a. Prior to placing fill and backfill material, obtain optimum moisture and maximum density properties for proposed material from CO.

b. Place fill and backfill material in thin lifts as necessary to obtain required compaction density.

c.

d.

NACE 325019

041423

Compact material with equipment of proper type and size to obtain density specified.

Use hand operated equipment for filling and backfilling within 5 FT of walls and less than 3 FT above pipes.

1) Compaction equipment exceeding 3000 LBS dead weight shall not be used within 5 FT of the wall as a minimum.

31 23 10 - 8

4.

2) Contractor is responsible for method of compaction so as not to damage walls or buried commodities.

e. Use only hand operated equipment for filling and backfilling next to walls and retaining walls.

f. Do not place fill or backfill material when temperature is less than 40 DEGF and when subgrade to receive material is frozen, wet, loose, or soft.

g. Use vibratory equipment for compacting granular material; do not use water.

Backfilling against walls:

a. Do not backfill around any part of structures until each part has reached specified

28-day compressive strength and backfill material has been approved.

b. Do not start backfilling until concrete forms have been removed, trash removed from excavations, have been completed.

c. Bring backfill and fill up uniformly around the structures.

D.

3.3

A.

3.4

A.

B.

C.

D.

Backfilling Outside of Structures Under Piping or Paving:

1. When backfilling outside of structures requires placing backfill material under piping or paving, the material shall be placed from bottom of excavation to underside of piping or paving at the density required for fill under piping or paving as indicated in this Specification Section.

2. This compacted material shall extend transversely to the centerline of piping or paving a horizontal distance each side of the exterior edges of piping or paving equal to the depth of backfill measured from bottom of excavation to underside of piping or paving.

3. Provide special compacted bedding or compacted subgrade material under piping or paving as required by other Specification Sections for the Project.

USE OF EXPLOSIVES

Blasting with any type of explosive is prohibited.

COMPACTION DENSITY REQUIREMENTS

Obtain approval from COR with regard to suitability of soils and acceptable subgrade prior to subsequent operations.

Provide dewatering system necessary to successfully complete compaction and construction requirements.

Remove frozen, loose, wet, or soft material and replace with approved material as directed by the

COR.

Assure by results of testing that compaction densities comply with the following requirements:

NACE 325019

041423

31 23 10 - 9

EXCAVATION AND BACKFILL

LOCATION COMPACTION DENSITY MOISTURE CONTENT

Inside of structures under foundations, under equipment support pads, under slabs-on-grade and scarified existing subgrade under fill material

[98% per ASTM D698] [95% per ASTM D698]

-2 to +3% of optimum

Outside structures next to walls, piers, columns and any other structure exterior member

[92% per ASTM D698] [90% per ASTM D698]

-2 to +3% of optimum

3.5

B.

C.

D.

3.6

A.

B.

SUBGRADE PROTECTION

Obtain approval from CO with regard to suitability of soils and acceptable subgrade prior to subsequent operations.

Provide dewatering system necessary to successfully complete compaction and construction requirements.

Remove frozen, loose, wet, or soft material and replace with approved material as directed by

CO.

Stabilize subgrade with well graded granular materials as directed by CO.

FIELD QUALITY CONTROL

All excavation, trenching, and related sheeting, bracing, etc. shall comply with the requirements of OSHA standards 29 CFR Part 1926.650 Subpart P, and state requirements. Where conflict between OSHA and state regulations exists, the more stringent requirements shall apply.

Responsibilities of Contractor:

1.

2.

3.

4.

5.

6.

7.

Review proposed materials for fill and backfill around structures.

All testing, observation and work indicated as being performed by the Material Testing Firm in this Specification Section.

Services will include verification and documentation of satisfactory soil materials, subgrade quality, sampling, placement, moisture conditioning, compaction and testing of proposed soil materials, and field testing for quality control.

Moisture density relations, to be established by the Geotechnical Engineer required for all materials to be compacted.

Extent of compaction testing will be as necessary to assure compliance with specifications. Prepare and submit inspection and test reports to CO.

Test reports to include the following:

a.

b.

c.

d.

e.

f.

g.

h.

Report and certification of aggregate fill and drainage fill.

Test reports on borrow material.

Verification of suitability of each footing subgrade material, in accordance with specified requirements.

Field reports; in-place soil density and moisture tests.

One optimum moisture-maximum density curve for each type of soil encountered.

Report of actual unconfined compressive strength and/or results of bearing tests of each strata tested.

Other documentation necessary for CO to approve earthwork.

Assist CO to determine corrective measures necessary for defective work.

8. Give minimum of 24 HR advance notice to Material Testing Firm when ready for compaction or subgrade testing and inspection.

9. Should any compaction density test or subgrade inspection fail to meet specification requirements, perform corrective work as necessary.

C. Responsibilities of Testing Agency for Excavation and Backfilling:

NACE 325019

041423

31 23 10 - 10

3.

4.

NACE 325019

041423

All required soil testing, observation, and work indicated in this Specification.

Services will include verification and documentation of satisfactory soil materials, subgrade quality, sampling, placement, moisture conditioning, compaction and testing of proposed soil materials, and field testing for quality control.

Moisture density relations, to be established by the CO required for all materials to be compacted.

Extent of compaction testing will be as necessary to assure compliance with specifications.

END OF SECTION 31 23 10

31 23 10 - 11

DIVISION 32

EXTERIOR IMPROVEMENTS

SECTION 32 01 11.53 REMOVAL OF EXISTING PAVEMENT MARKINGS

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies requirements for removal of existing pavement markings.

PART 2 – PRODUCTS

2.1

A.

MATERIAL

Repair material, if necessary, shall be specifically designed to repair medium to large cracks, smooth out rough spots and fill minor depressions. The material shall be a two component liquid consisting of a polymer base with carbon black and an activator. The material when mixed with a fine aggregate and a black topping aggregate forms a repair compound having a compressive strength between 1500 and 3000 psi, flexural strength between 700 and 1025 psi and bond strength between 200 and 360 psi.

PART 3 – EXECUTION

3.1

A.

REMOVAL OF EXISTING PAVEMENT MARKINGS

Existing pavement markings shall be removed prior to application of asphalt surface course.

1.

2.

Any depression left by pavement marking removal shall be filled to within a 1/16” of the existing pavement surface at no additional cost to the NPS.

In no case shall the depression created by the removal operations be greater than ½”.

B. Approved methods of pavement markings removal include:

1.

2.

3.

High pressure water.

Steam or superheated water.

Mechanical devices such as grinders, sanders, scrapers, scarifiers and wire brushers.

C.

D.

Painting or paving over a pavement marking line or symbol with asphaltic liquids or paints will not be allowed unless approved by the Contracting Officer.

Material deposited on the pavement from removal operations shall be removed as the work progresses. Accumulations of sand or other material which might interfere with drainage or could constitute a hazard to traffic will not be permitted.

32 01 11.53 - 1

REMOVAL OF EXISTING PAVEMENT MARKINGS

A.

B.

C.

REPAIR OF DEPRESSIONS

Repair material, if necessary, shall be placed when the weather is dry, rain is not forecast for 24 hours, and the ambient temperature is above 550F. Repair material shall be protected from traffic until the material has cured and will not track. Additional applications of the patching material may be made after a 24 hour cure.

Any depressions created during the removal operations that are greater than ½” shall not be repaired with a troweling material but shall be repaired by milling to 1” depth and repaired with hot mix asphalt.

Acceptance

1. Removal of existing pavement markings will be evaluated under Section 01 90 00.

END OF SECTION 32 01 11.53

32 01 11.53 - 2

REMOVAL OF EXISTING PAVEMENT MARKINGS

SECTION 32 01 16.71 – COLD MILLING ASPHALT PAVING

PART 1 - GENERAL

1.1

A.

B.

C.

D.

SUMMARY

This work consists of removal of hot mix asphalt (HMA) including cold mix, and/or surface treatment pavement by cold milling; hauling of cuttings; cleaning of asphaltic concrete pavement and concrete pavements (if applicable) in preparation for an overlay in conformity with these specifications, and to the lines, grades, and cross sections shown on the plans or drawings or as established by the National Park Service (NPS) or the Contracting Officer (CO). This work includes milling of intersecting streets to the limits shown on the plans or drawings or as ordered by the CO.

All salvaged pavement shall become the property of the Contractor and shall be removed from the site unless otherwise negotiated by the NPS.

The Contractor shall visit the site of the proposed work and fully acquaint themselves with the existing conditions relating to construction, labor, and traffic. The Contractor shall be fully informed as to the facilities involved and the difficulties and restrictions regarding the performance of the contract.

Areas shall not be left in a milled condition for more than ten (10) calendar days prior to paving, unless otherwise approved by the NPS. The NPS may further restrict the time limits when conditions warrant.

PART 2 - PRODUCTS

2.1

A.

EQUIPMENT

Pavement Profilers: The Contractor shall furnish one (1) or more machine(s) operated by experienced operators. The equipment for removing the pavement surface shall be a cold plaining (milling) machine specifically designed for automatically controlled profiling and adequate to perform the work according to the lines, grades, and tolerances.

1.

2.

The Equipment shall be maintained in a satisfactory working condition so as not to cause delays, and the machine must be equipped with taillights, headlights, and necessary reflectors so that it can be operated in traffic with complete safety.

Pavement profilers shall have a means of loading by an integral loading belt, and it shall have the ability to cold mill concrete patches when encountered in the pavement.

B. Restrictions: Track-mounted cold milling equipment will be required for primary operations on HMA surfaces in which the Contractor anticipates pavement milling down to within three quarters (3/4) of an inch of an unbound base course. Either track or conventional wheeled milling machines will be acceptable on work requiring only partial-depth milling of the bound

32 01 16.71 - 1

COLD MILLING ASPHALT PAVING

C. materials such that sufficient pavement materials exist after removal to support the cold milling operation. Wheeled machines of sufficient size will be permitted for trimming operations.

Grade Control: The automatic controls on the milling machine shall provide accurately established profile grades at each edge of the machine by referencing from the existing pavement or an independent grade reference, where required, or be capable of automatically maintaining a designated cross slope from a single reference.

1.

2.

3.

The milling machine shall be equipped with a built-in automatic grade control system that can control the longitudinal profile and the transverse cross-slope to produce the specified results. The longitudinal controls shall be capable of operating from any longitudinal grade reference, including string line, ski (30 foot minimum), mobile string line (30 foot minimum), or matching shoe. The transverse controls shall have an automatic system for controlling cross-slope at a given rate.

The rotary drum of the machine shall utilize carbide tip tools spaced not more than 5/8 inches apart.

The milling machine shall be self-propelled and shall have sufficient power, traction, and stability to maintain an accurate depth of cut.

D.

E.

F.

G.

Documentation: The Contractor shall provide to the CO at the Pre-Construction meeting full details concerning the machine to be used, including type, weight, milling width (sixty (60) inch minimum for primary operations), milling depth per pass (two (2) inch minimum), operating speeds, air pollution control, and dust suppression.

Sweepers: The textured surface shall be left clean and dust free by the use of self-propelled power sweepers with spray bar, vacuums, hand sweepers, or other methods approved by the CO. All equipment shall be equipped with or provide a means of effectively limiting the amount of dust escaping during the milling and removal operation.

All equipment must meet the current standards set by the Air Quality Act of noise and air pollution as well as any additional local, state, or federal pollution laws and regulations.

Dust Control: Wet suppression equipment shall consist of sprinkler pipelines, tanks, tank trucks, or other devices capable of providing regulated flow, uniform spray, and positive shut- off.

PART 3 - EXECUTION

3.1

A.

TRANSPORTATION OF MATERIALS

Caution shall be taken to ensure that any vehicle used to transport milled material intended for use in any recycled asphalt concrete will be free from any foreign matter (such as dirt, debris, leaves, solvents, etc). Disposal of the sweepings or oversized pieces of pavement will not be permitted near the cold milling stockpiles of a HMA production plant.

32 01 16.71 - 2

A.

CONSTRUCTION METHODS

Pavement Milling: Remove HMA to a depth as noted in the plans or exhibits and indicated by the CO. Variable milling depths may be required to improve drainage and cross slope.

1.

2.

3.

4.

5.

The cutting tools on the revolving cutting drum must be continually maintained and shall be replaced as warranted to provide a uniform pavement texture. A test strip may be ordered by the CO which shall be a maximum length of 500 feet and shall meet the criteria for surface tolerance and cross slope as noted in this specification.

The Contractor shall be responsible for the maintenance of the milled roadway. Exposed granular material shall be compacted to proper lines and grades. The exposed granular material shall be patched with HMA in accordance with procedures outlined in the Partial Depth Specification prior to paving. Included in this item will be all labor, equipment, materials, and maintenance necessary to provide a satisfactory surface for paving.

Where a surface delamination between HMA layers or a surface delamination of HMA on Portland cement concrete causes a non-uniform texture to occur, the depth of milling shall be adjusted +/- ½ inch or until delamination is eliminated under the direction of the CO and at no additional cost to NPS.

Care shall be utilized by the Contractor to ensure that the milling operation does not disturb or damage pavement areas to remain. If milling operations begin to displace or damage pavement to remain, then the Contractor shall cease milling operations and make adjustments as required and as approved by the CO. Any damage caused by the milling operations shall be repaired at the Contractor’s expense and as directed by the CO.

Asphalt concrete that cannot be removed by cold planning equipment shall be removed by other methods acceptable to the CO.

B.

C.

Transition Milling: Where the milling area terminates and abuts the existing adjacent pavement, a neat straight line shall be cut with suitable power-driven equipment before commencing the pavement removal with a milling machine. It is the intention of this operation and the obligation of the Contractor to produce a uniform straight line at the joint. The resulting joint shall be filled with cold patch material and maintained by the Contractor as necessary to provide a safe transition from the milled surface to the adjacent pavement for the traveling public at all times.

Structures: Care shall be utilized by the Contractor to ensure that no damage occurs to curbing, median barriers, bridge scuppers, parapets, manholes, utility valve boxes, loop detectors, traffic counters, and/or similar structures installed in or adjacent to the street. The Contractor shall, at no additional cost to the NPS, repair or replace any structures damaged.

1. If concrete pavement base is present within the construction limits, the Contractor shall inform the CO of the location. Milling of the various asphaltic pavement overlays on the concrete base shall be performed where directed by the CO in a manner that does not damage the concrete base. This work shall be included in the various milling items and no additional payment or compensation shall be made for work necessary due to the concrete pavement base.

32 01 16.71 - 3

D.

E.

Joints: All butt joints created by the milling operation at driveways which are greater than two (2) inches in depth shall be filled with millings or cold patch material and maintained by the Contractor to allow a safe egress and ingress for the traveling public at all times. All butt joints created by the milling operation at intersecting streets which are greater than one-and-one-half (11/2) inches in depth shall be filled with cold patch material and maintained by the Contractor to allow a safe egress and ingress for the traveling public at all times.

Safety: The Contractor will provide all necessary labor, materials, and equipment for protection of motorists and pedestrians from any protruding structures that may result from the milling operation. The Contractor shall also be responsible for the protection of motorists and pedestrians from any irregularities and pavement drop-offs that may result from the milling operation.

1.

2.

3.

In the event of rain or inclement weather, the Contractor shall suspend milling operations.

The Contractor shall make necessary allowances such as for drainage of water that may pond in areas where the milling was completed, and the paving has not been completed.

Those areas that are to be opened to traffic shall have drainage outlets cut through the shoulder at locations designated by the CO. The Contractor shall plan and prosecute the milling operation to avoid the trapping of water on the roadway. Drainage outlets shall be restored to original grade, unless otherwise directed by the CO. Cost for cutting and restoring the drainage slots in the roadway shoulder shall be included in the price bid for other items of work.

The Contractor shall provide a means to effectively limit the amount of airborne dust created during trafficking. The use of self-propelled sweepers may be necessary during the time in which the street is left in a milled state.

The milling operation shall not proceed until the Contractor is prepared to overlay the milled section with its intended wearing or surface course. A street may be left in a milled condition for no more than ten (10) calendar days, unless otherwise approved by the

CO.

F.

G.

H.

I.

Sweeping: The Contractor shall sweep and remove loose cuttings, dust, or other objectionable material from the roadway at the end of each working day using power brooms, power vacuums or both; and ancillary equipment, tools, and labor necessary to properly prepare the road for subsequent tack coat and paving.

Patching: During the cold-milling operation, any localized areas of exposed base materials will be repaired by the Contractor at no additional cost to the NPS. The area of base exposure shall be repaired by placing a minimum of 1 inch of compacted HMA, or as otherwise directed by the CO.

Any patching required shall be repaired before the end of the working day, and in a manner satisfactory to the CO.

Pollution Control: All equipment will be operated such that it will…