04_Asphalt 2025 Project Technical Specifications.pdf

Project Technical Specifications Page 1 2025 Asphalt Overlay

PROJECT TECHNICAL SPECIFICATIONS

2025 ASPHALT OVERLAY AND CONCRETE REPLACEMENT

PROJECT NO. 309001001-2025

TOWN OF BRECKENRIDGE, COLORADO

GENERAL STATEMENT

Section 101 and Sections 200 through 717 of the Standard Specifications for Road and Bridge Construction, 2023 edition, published by the Colorado Department of Transportation (CDOT), State of Colorado, as re-emphasized, supplemented or amended by the State and by these specifications shall govern all road and bridge construction work within the public right-of-way and in other areas of Town jurisdiction or ownership. In cases of any conflicts of meaning between the CDOT specifications and other specifications, the supplements and amendments listed below or in the project Special Provisions shall govern. The Special Provisions (if any) contained in the Bid Documents shall have precedence over all other specifications.

When a reference is made to ASTM, AWWA, AASHTO, or other specifications or methods, it shall be understood to mean the latest edition or revision of said specification as amended and issued at the time of the Invitation to Bid.

The Method of Measurement and Basis of Payment for the items of work specified herein and in the CDOT specifications apply only to Town of Breckenridge projects and are not required to be used on projects which are administered and paid for by private developers or other agencies.

The Method of Measurement and Basis of Payment will be based on CDOT specification unless otherwise contained in the Bid Documents.

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DIVISION 100

GENERAL PROVISIONS

SECTION 101: DEFINITION AND TERMS

101.01 Abbreviations. Add the following abbreviations:

CAPA Colorado Asphalt Pavement Association HMA Hot Mix Asphalt SSFRB Town of Breckenridge Standard Specifications for Road and Bridge Construction (latest edition) TEDS Transportation Engineering Design Standards (latest edition) QAT Quality Assurance Technician

ADD or REVISE Definitions as Follows:

101.04 Award. REPLACE “Department” WITH “Town”.

101.6 Bidder. In the CDOT definition REPLACE “Department” WITH “Town”’.

101.09 CDOT Resident Engineer. DELETE in its entirety and REPLACE WITH: “Town will determine the Resident Engineer for each project.”

101.16 Contract. DELETE in its entirety. See definition in the Town General Contract Conditions.

101.18 Contract Modification Order. DELETE in its entirety.

101.21 Contract Time. DELETE in its entirety. See definition in the Town General Contract

Conditions.

101.22 Contractor. DELETE in its entirety. See definition in the Town General Contract

Conditions.

101.28 Department. REVISE to read: “Department of Public Works, Town of Breckenridge, Colorado.”

101.29 Engineer. DELETE in its entirety and REPLACE WITH “The Project Engineer, who may be a Town employee or hired consultant who has been appointed or authorized by the Town to oversee the technical aspects of the work and to administer the Contract on behalf of the Town. The term “Engineer” may also apply to a Professional Engineer hired by a developer to design and/or administer the construction of public infrastructure in accordance with a development approved by or contracted for/or with the Town.”

101.33 Force Account Work. REVISE to read: “Work paid for on the basis of actual costs plus approved additives, in accordance with the General Contract Conditions.”

101.39 Laboratory. REVISE to read: “Any testing laboratory designated by the Engineer.”

101.46 Planned Force Account. DELETE in its entirety.

101.47 Plans. REPLACE “Department” WITH “Town”.

101.48 Pre-construction Conference. DELETE in its entirety. See definition in the Town General Contract Conditions.

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101.50 Project. DELETE in its entirety. See definition in the Town General Contract Conditions.

101.51 Project Engineer. REPLACE “Chief Engineer’s” WITH “Town’s”. REPLACE “CDOT”

WITH “Town”. REPLACE “Resident” with “Town.”

101.55. Proposal Form. REVISE to read: “The documents furnished by the Town on which the offer of a bidder is submitted. Also called Bid Proposal or Bid Form.”

101.56 Proposal Guaranty. REVISE to read: “Bid guaranty as defined in the Town General Contract Conditions.”

101.58 Region Transportation Director. DELETE in its entirety.

101.68 Shop Drawings. DELETE in its entirety. See definition in the Town General Contract Conditions.

101.73 Specifications. DELETE in its entirety. See definition in the Town General Contract Conditions.

101.76 State. DELETE in its entirety.

101.86 Supplemental Specifications. DELETE in its entirety. See definition of Supplementary Conditions in the Town General Contract Conditions.

101.92 Work. DELETE in its entirety. See definition in the Town General Contract Conditions.

101.95 Workplace Violence. REPLACE “CDOT” WITH “Town”.

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SECTION 102: BIDDING REQUIRMENETS AND CONDITIONS

DELETE and REPLACE with the Town of Breckenridge, General Contract Conditions.

SECTION 103: AWARD AND EXECUTION OF CONTRACT

SECTION 104: SCOPE OF WORK

RETAIN Section 104.04 Maintaining Traffic. REPLACE “Department” WITH “Town”.

ADD the following to Section 104.04 (e) “Construction Under Traffic The contractor shall maintain a minimum of one lane of traffic when feasible and may detour traffic when required. When one lane cannot safely be maintained, the length and duration of the full road closure shall be minimized to the extent possible.

Two lanes of traffic shall be reopened during evenings and weekends. Full road closures during nights and weekends shall be submitted for review and approval by Town Engineer, but shall not typically be permitted on the project. Access to all residences and businesses shall be maintained at all times during construction. Access shall only be closed when asphalt pavement is being placed and pavement is actively cooling. Flaggers shall be used to assist with construction access and pedestrian traffic control.

Pedestrian traffic shall be maintained through the construction zones. Temporary curb ramps shall be installed consisting of compacted base course. Pedestrian routes shall be a minimum of 5’ wide, meet ADA requirements, and be separated from traffic by approved barriers.

Flaggers shall be used to assist with construction access and pedestrian traffic control.

The Contractor shall provide to the Town a detailed phasing plan, schedule, Traffic Control Plan and MHT for each anticipated phase of construction.

Flagging The contractor shall provide competent certified flaggers to direct traffic when work is being done in the street ROW or intersection that is open to traffic. The Contractor shall provide a minimum of two flaggers while construction activities are occurring on active streets. The flaggers will be required to direct vehicular traffic and construction vehicles. Pedestrian and vehicular traffic shall be the priority of the “minimum” required flaggers. Certified flaggers, additional to the “minimum” required, may be utilized at the Contractor’s discretion to assist with the Contractor construction activities. Flagging shall conform to the requirements of the MUTCD. The cost of the “minimum” flaggers and additional flaggers utilized by the Contractor shall be included in the unit price of the bid item, ”Flagging”.

Traffic Control Supervisor (TCS) The contractor shall provide a competent CCA or ATSSA certified Traffic Control Supervisor (TCS) on site for any set up, moving, reconfiguration, and removal of all traffic control devices required for the project. The TCS will be required to be on site and to inspect operations at least three times a day, at minimum. The TCS may be utilized as a flagger, and be recognized as one of the “minimum” required flaggers if the work is contained within a reasonable work zone length. The Traffic Control Supervisor shall conform to the requirements of the MUTCD, and will be included in the cost of the bid item, Traffic Control.

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Traffic Control Devices The Contractor shall furnish, erect, and maintain all barricades, construction signing, lights, and other traffic control devices in conformity to the Manual of Uniform Traffic Control Devices for Streets and Highways and as called for in the plans and drawings. All signs and barricades to be paid for by the owner shall be in good condition and acceptable to the project engineer. All required traffic control devices, signs and flaggers shall be in place through the construction area prior to beginning and work.

Construction signing shall be black on reflective orange and per MUTCD standards unless otherwise specified.

Traffic Control Devices must be cleared from the work zone within 24 hours of finishing work in an area.

Maintenance The Traffic Control Supervisor shall conduct daily inspections of all traffic control devices to ensure proper placement and condition of all signs, barricades and channelization devices, and shall log placement, inspection, maintenance, and replacement of all traffic control devices. Copies of the contractor’s daily traffic control logs shall be given to the engineer once per week.

All construction signing, barricades, channelization devices, temporary pavement markings, and other construction traffic control devices shall be kept clean, legible, visible, and in proper position at all times. Damaged traffic control devices shall be repaired or replaced immediately.

Method of Handling Traffic (MHT) All MHT’s must be submitted to the Town for approval seven days prior to commencement of all work or moving areas. The Contractor shall implement the MHT in accordance with the plans and specifications.

Any variance from those plans will require the approval of the Engineer.

The MHT shall be drawn specific to this project. The MHT shall be drawn reasonably close to scale and shall show representative project landmarks, streets, and salient features. The Engineer, upon request from the Contractor, will furnish to the Contractor base mapping for preparation of the MHT. An individual MHT shall be submitted for each phase of work.

The MHT shall include the following as a minimum:

1. Detailed diagrams showing the size and location of all proposed traffic control devices.

2. Access plan for all businesses.

3. Access plan for pedestrians.

4. Emergency vehicle access plan.

5. Supporting documentation as required.

6. Flagger number and locations.”

Exceptions to these must be given approval from the Town and arrangements made to outreach to any affected households or businesses.

Traffic:

Access must be provided to businesses and residents, except for times when pavement is actively cooling.

Streets may only be a planed (milled) surface for 14 calendar days. Final pavement shall be placed prior to 14 calendar days expiring.

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DELETE remaining sections and REPLACE with the Town of Breckenridge, General Contract Conditions.

SECTION 105: CONTROL OF WORK

SECTION 106: CONTROL OF MATERIAL

SECTION 107: LEGAL RELATIONS AND RESPONSIBILITY TO PUBLIS

SECTION 108: PROSECUTION AND PROGRESS

108.03 ADD: Contractor shall coordinate schedule with dates listed in contract and to ensure asphalt replacement occurs after concrete replacement for all locations. Asphalt replacement shall be commenced within two weeks of concrete replacement or planning (milling) at each location.

SECTION 109: MEASUREMENT AND PAYMENT

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DIVISION 200

EARTHWORK

SECTION 201: CLEARING AND GRUBBING

201.02 ADD: “Trees designated to be cleared, removed or limbed shall be the property of the Contractor.

As the property of the Contractor, all cleared stumps, roots, willows, shrubs, and limbs shall be disposed of by the Contractor.

Hand grubbing may be required in roadway sections to ensure that no organic materials will be present in the road section.”

SECTION 202: REMOVAL OF STRUCTURES AND OBSTRUCTIONS

202.02 ADD: “Excess material generated by the installation of the drains, sewers and water mains shall be removed and disposed of by the Contractor. Final grade at the trenches shall match subgrade of the road reconstruction.”

202.09 ADD: “Milling is the same operation as planing.

The designated asphalt shall be removed and disposed of by the Contractor. Asphalt removed shall include the road base material.”

SECTION 203: EXCAVATION AND EMBANKMENT

203.06 DELETE the first paragraph of Section 203.06 and REPLACE with the following:

“When Contractor Process Control is required, the Contractor’s Process Control Representative shall be certified with CDOT’s Excavation, Embankment, and Soil Inspection certification course.”

DELETE the third paragraph of Section 203.06 and REPLACE with the following “Unless a thickness is otherwise specified in the Contract, the upper 3 inches of the ground surface will be considered topsoil and shall be removed in accordance with Section 207 prior to placement of embankment fill.”

SECTION 206: EXCAVATION AND BACKFILL FOR STRUCTURES

RETAIN all sections.

SECTION 207: TOPSOIL

SECTION 208: EROSION CONTROL

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SECTION 209: WATERING AND DUST PALLIATIVES

SECTION 210: RESET STRUCTURES

SECTION 212: SEEDING, FERTILIZER, SOIL CONDITIONER, AND SODDING

SECTION 213: MULCHING

SECTION 214: PLANTING

SECTION 215: TRANSPLANTING

SECTION 216: SOIL RETENTION COVERING

SECTION 217: HERBICIDE TREATMENT

SECTION 250: ENVIRONMENTAL, HEALTH AND SAFETY MANAGEMENT

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DIVISION 300

BASES

SECTION 304: AGGREGATE BASE COURSE

304.04 DELETE AND REPLACE with: “Following utility construction, base materials shall be placed to the minimum depth as shown on the plans. If the required compacted depth of the aggregate base course exceeds 6 inches, it shall be constructed in two or more layers of approximately equal thickness. The maximum compacted thickness of any one layer shall not exceed 6 inches. When vibratory or other approved types of special compacting equipment are used, the compacted depth of a single layer may be increased to 8 inches upon request, provided that specified density is achieved, and written approval is given.”

ADD “Aggregate base course material will be placed along shoulders where pavement edge is exposed.”

304.06 First paragraph, DELETE “95 percent” and REPLACE with “98 percent.”

First paragraph, DELETE “AASHTO T 180 as modified by CP 23” and REPLACE with

“AASHTO T-99.”

Second paragraph, DELETE “95 percent” and REPLCE with “98 percent.”

Second paragraph, DELETE “AASHTO T 180, Method D” and REPLACE with “AASHTO

T-99, Method D.”

ADD 304.07 immediately after 304.06 called 304.07 Compaction Testing Frequency.

Renumber the remaining numbered entries to be continuous from this additional entry.

ADD the following language to the newly created numbered section 304.07 Compaction Testing and Frequency: “Aggregate base course shall be accepted for density on a lot basis. A lot will consist of one day's production where it is not expected to exceed 2,400

sq. yds. A lot will consist of one-half day's production where a day's production is expected to consist of between 2,400 and 4,800 sq. yds.

Each lot shall be divided into two equal sublots. One test shall be made for each sublot.

Sampling locations will be determined by a random basis in accordance with statistical procedures contained in ASTM D3665.”

304.08 Add “Unit cost shall include all costs to place base course material along shoulders. It should also include all costs to place base course beneath full depth patches and full depth replacement areas as needed at a depth of 6”.

SECTION 306 RECONDITIONING

ADD the following to Section 306.05:

306.05 Deep Subgrade Repair

DESCRIPTION

This work consists of:

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1. The full depth removal and disposal of damaged or unstable areas as directed by the Town in the existing roadway to an approximate depth of 24-inches below the finished subgrade elevation.

2. Stabilizing the sub-grade with a sheep-foot roller (no vibratory action) at the direction of the Engineer.

3. Installing geotextile only if directed by the Engineer.

4. Providing, placing, moisture conditioning, and compacting 18” of crushed concrete with a sheep-foot roller (vibratory action required) at the direction of the Engineer (requires crushed concrete to be compacted in lifts suitable to compactors size and weight at the direction of the Engineer).

5. Providing, placing, moisture conditioning, and compaction of FDR or ABC Aggregate material over the crushed concrete to the grades established at the direction of the Engineer.

CONSTRUCTION REQUIREMENTS

It is the sole responsibility of the contractor to achieve the specified stabilized subgrade with his method and equipment, to the satisfaction of the Town in accordance with this specification.

Unsuitable material shall be hauled offsite and disposed at an acceptable location at the contractor’s expense. Disposal fees will not be paid for separately, but shall be included in the work.

After satisfactory removal is completed, the recycled asphalt subgrade material shall be shaped and compacted to the lines and grades as directed by the Engineer. The subgrade material shall be graded and compacted to at least 95% of the maximum dry density as determined by AASHTO Method T-180 and the moisture content must be no more or less than 3% of the “Standard Optimum”. “Proof rolling” with a full 2,000 gallon double axle water truck, or an equivalent may be substituted for compaction testing, when authorized by the Engineer.

METHOD OF MEASUREMENT

Remove and Replace Unsuitable Subgrade shall be measured by field measurement of the square yards of affected repair at the bottom of the excavation.

BASIS OF PAYMENT

Payment will be made under:

Pay Item Pay Unit Deep Subgrade Repair Square Yard

This unit bid price shall include the following items:

The removal and disposal of unsuitable material shall not be paid for separately, but shall be included in the work. The delivery, handling, and placement of the crushed concrete and FDR or ABC aggregate material shall not be paid for separately, but shall be included in the work. Any geotextile material used at the direction of the Engineer shall not be paid for under this line item, but shall be paid for under Geotextile.

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Minor subgrade work, defined as requiring NO import or export of material, will be incidental to the HMA pay item.

306.06 Subgrade Preparation

DESCRIPTION

This work consists of blading, shaping, moisture conditioning and compacting existing sub-grade material with the intent of providing a uniform widening/compacting of suitable existing soils.

CONSTRUCTION REQUIREMENTS

Construction and material requirements shall be per the latest edition of the CDOT Standard Specifications for Road and Bridge Construction and these special provisions.

Placement of sub-grade material shall conform to the existing profile, lines, grades, cross-sections, and when placed and compacted it shall result in a firm, dense, unyielding foundation.

Sub-grade material shall not be placed upon a soft, spongy or yielding subgrade.

Sub-grade material shall be deposited and spread without particle segregation in loose layers not to exceed six inches in depth when compacted. If the required compacted depth of the road base exceeds six inches, it shall be constructed in two or more layers of approximately equal thickness.

The material shall be compacted to at least 95% of the maximum dry density at +/- 2% of optimum moisture content as determined by AASHTO T-180.

The surface of each layer shall be maintained during the compaction operations so that a uniform texture is produced and the aggregates are firmly keyed. Water shall be uniformly applied during compaction, in the quantity necessary for proper moisture content.

Subgrade Preparation shall be measured by the square yard, compacted and finished in place.

Payment will be made under:

Pay Item Pay Unit

Subgrade Preparation Square Yard

This Work is to include the 24’ paved platform plus the two foot shoulders on both sides for a total of 28’. Water for compaction, and finish grading, will not be paid for separately, but shall be included in the work.

Geotechnical testing shall not be paid for separately, but included in the unit price cost.

END OF SECTION

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SECTION 307 LIME TREATED SUBGRADE

307.04 DELETE and REPLACE the first sentence of the first paragraph so that it reads: “The

Contractor shall construct one or more compacted courses of treated material, to the depth specified in the Contract and/or Construction Drawings.”

307.09 First paragraph (a), DELETE “95 percent” and REPLACE with “98 percent.”

ADD a new numbered section after 307.09 Compaction, called “307.10 Compaction

Testing Frequency.” Renumber the remaining numbered entries to be continuous from this additional entry.

ADD the following language to the newly created numbered section 307.10 Compaction Testing and Frequency: “Aggregate base course shall be accepted for density on a lot basis. A lot will consist of one day's production where it is not expected to exceed 2,400

sq. yds. A lot will consist of one-half day's production where a day's production is expected to consist of between 2,400 and 4,800 sq. yds.

Each lot shall be divided into two equal sublots. One test shall be made for each sublot.

Sampling locations will be determined by a random basis in accordance with statistical procedures contained in ASTM D3665.”

ADD the following asterisk note below Table 307-1 SCHEDULE FOR MINIMUM

SAMPLING AND TESTING:

“*Testing procedures listed in the above table for Moisture Density Curve AASHTO T99 apply to soils only. The testing frequency does not apply to Aggregate Base Course or Lime Treated Subgrade. For density testing frequency requirements for Aggregate Base Course or Lime Treated Subgrade, see Sections 304.07 or 307.10, respectively.”

SECTION 310 FULL DEPTH RECLAMATION

ADD Section 310 Full Depth Reclamation to these specifications.

ADD the following:

DESCRIPTION

310.01 This work consists of pulverizing the existing asphalt mat and mixing the pulverized asphalt mat with the existing base course, to the specified depth, and grading and compacting the mixed material in accordance with, and at locations as shown in the Contract.

310.02 The Contractor shall develop a written method to maintain the centerline geometry, profile elevations, and cross slope of the existing roadway. The plan shall be submitted to the Engineer for approval a minimum of two weeks prior to starting work. The plan shall include, but is not limited to, the following:

1. Mobilization of equipment to haul and place material

2. The estimated length of roadway (both travel lanes) that can have existing pavement structure removed, embankment cut to new elevation, and placement of Aggregate Base Course material so that the difference in elevation between lanes is 1 inch or less at the end of the work shift

3. Contractor’s plan to address stabilization of soft spots

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4. Contractor’s method to keep the road open for two-way traffic after the pavement and/or base is removed, and before or during a major precipitation event

5. Method of Handling Traffic to be used during the operation

6. Contractor’s implementation of Revision of Section 104.04 - Maintaining Traffic

Reclamation of the existing asphalt pavement shall not commence until the Contractor has an approved design mix for Hot Mix Asphalt.

The existing asphalt mat shall be cut at neat lines as shown in the plans by the use of a cutting wheel attached to a blade or by another approved method. The existing asphalt mat shall be pulverized and mixed with the existing base course to a specified depth or as directed by the Engineer, with a self-propelled rotary type mixing machine. Optimal speed for the reclaimer shall be 11.5 feet per minute, and it shall be the responsibility of the Contractor to assure the Town this rate is not exceeded. Deviations must be made by the Engineer in the field.

The mixing machine shall make as many passes as required to uniformly mix the asphalt and existing base course to the required thickness. Mixing of the different materials shall create a homogenous mixture. The particle size of the pulverized asphalt mat shall be a minimum of 99 percent passing the 1-1/4 inch sieve. When the addition of water is necessary for initial compaction purposes, unless otherwise approved by the Engineer, it shall be added through the mixing machine with the capability to uniformly distribute water through the mixed materials.

When proper mixing has been accomplished, the mixture shall then be bladed, shaped, wetted or dried, and rolled to meet a minimum of 95 percent of the maximum wet density determined in accordance with AASHTO T-180 Method D. The soils moisture-density curve will be developed using wet densities and the percent compaction will be calculated using wet density.

The maximum depth to be compacted in one lift is 8 inches. If the depth of the reclaimed material exceeds 8 inches, the Contractor shall remove the material in excess of 8 inches and compact the material in layers not exceeding 8 inches. Thickness will be determined in the field with the Engineer at the beginning of work.

Grading equipment used to establish the final surface elevations shall have automatic controls for transverse slope. The transverse slope controls shall be capable of maintaining the final surface within 0.1 percent of the specified slope. Variations from the subgrade plane shall not be more than ¼ inch. The work shall be maintained and tested for conformance to these requirements immediately prior to placing additional pavement layers.

The minimum quantity for acceptance testing will be based on a random schedule of 1/4000 square yards of reclaimed material. Every 20,000 square yards a verification point will be tested to confirm the accuracy of the moisture-density curve.

The maximum time a portion of the roadway will be unpaved is ten (10) working days unless otherwise specified. The exposed longitudinal joint between the existing asphalt mat and the processed mat shall not remain in place for more than one day unless approved by the Engineer. When additional aggregate base course is imported and placed before processing begins, the full width of the roadway shall be completed daily. Joint construction and maintenance shall conform to subsection 401.16.

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310.03 Full Depth Reclamation of Hot Mix Asphalt Pavement will be measured by the square yard of roadway treated, completed and accepted.

310.04 The accepted quantities of Full Depth Reclamation of Hot Mix Asphalt Pavement will be paid for at the contract unit price per square yard for Full Depth Reclamation of Hot Mix Asphalt Pavement, for the depth shown in the project plans. The depth shown in the plans is based on cores obtained from the existing pavement, and the Contractor should be aware that the depth will vary and, in some locations, will be either less or more than the depth range shown in the plans. The pay item shown in the plans shall be that used for the entire project, regardless of variations discovered during construction.

Full Depth Reclamation of Hot Mix Asphalt Pavement (6 - 10 inches) Square Yard

Payment for Full Depth Reclamation of Hot Mix Asphalt Pavement will be full compensation for all work necessary to complete the item including cutting of the existing asphalt mat, pulverizing the existing asphalt mat, mixing the pulverized asphalt mat into the existing base course, moving the pulverized material and existing base course, wetting and compacting the mixed pulverized asphalt mat and base course, blading, shaping, haul, water, and maintenance of the riding surface.

SECTION 311 SHOULDERING (FULL DEPTH RECLAMATION SECTIONS)

ADD Section 311 Shouldering ADD the following:

DESCRIPTION

311.01 This work consists of the shaping and grading of full depth reclamation (fdr) material to taper the shoulder material from the new top of the new FDR paved section to the existing ground/ditch.

311.02 The Contractor shall utilize excess FDR material placed to the side of the roadway, to replace the shoulder taper once the new pavement section has been installed. FDR material shall be compacted to 95% standard proctor maximum density. No import of material for this work will be paid under this item. This may require re-establishing the ditch, which will be incidental and not be paid separately. The desired slope will be 2H:1V unless approved by the Engineer.

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311.03 Shouldering will be paid per linear foot of adjacent roadway. It will include the width needed to taper from the new pavement to the existing ditch.

311.04 Will be paid for at the contract unit price per linear foot of roadway. Unit cost shall include hauling, placing, finishing, and compacting material.

Shouldering Linear Foot

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DIVISION 400

PAVEMENTS

SECTION 401 PLANT MIX PAVEMENTS - GENERAL

401.08 ADD the following sentence to the end of paragraph one:

“Asphalt mixing and storage plant operations shall comply with ASTM D995 for materials storage, control, mixing, and for plant equipment and operation.”

401.11 DELETE AND REPLACE with: “When ordered by the Engineer, the Town of Breckenridge, or specified in the Contract, a tack coat shall be applied between pavement courses at a rate of 0.05 to 0.15 gal/sq. yd. and paid for in accordance with Section 407.”

401.17 DELETE AND REPLACE paragraph one with the following:

“The hot mix asphalt shall be compacted by rolling. Both steel wheel and pneumatic tire rollers will be required. The number, weight, and type of rollers furnished shall be sufficient to obtain the required density while the mixture is in a workable condition. Compact mixture with hot hand tampers or vibrating plate compactors in areas inaccessible to rollers.

Accomplish breakdown or initial rolling immediately following rolling of joints and outside edge. Check surface after breakdown rolling, and repair displaced areas by loosening and filling, if required, with hot material. Follow with second rolling as soon as possible, then proceed with third rolling before mixture is cold. Rolling shall be continuous until the required density is obtained. When the mixture contains unmodified asphalt cement (PG 58 28 or PG 64 22) or modified (PG 58 34), and the surface temperature falls below 185 °F, further compaction effort shall not be applied unless approved, provided the Contractor can demonstrate that there is no damage to the finished mat. If the mixture contains modified asphalt cement (PG 76 28, PG 70-28 or PG 64 28) and the surface temperature falls below 230 °F, further compaction effort shall not be applied unless approved, provided the Contractor can demonstrate that there is no damage to the finished mat.

After final rolling, do not permit vehicular traffic on pavement until it has cooled and hardened.

Erect barricade to protect paving from traffic until mixture has cooled and attained its maximum degree of hardness.”

401.18 DELETE AND REPLACE with: “Placing of the hot mix asphalt shall be continuous, and rollers shall not pass over the unprotected end of a freshly laid mixture. Transverse joints shall be formed by cutting back on the previous run to expose the full depth of the course.

Tack coat shall be applied to exposed asphalt surfaces before placing new pavement.

Meet existing thickness of surface and base courses, but not less than specified for new work.

Where new work joints existing asphaltic concrete paving on public right-of-way, comply with the requirements of local authorities for surface and base course thickness.

Location and configuration of longitudinal joints shall be in accordance with subsection 401.16.”

401.19 ADD additional numbered section “401.19 Manholes and Valve Boxes” and renumbering subsequent numbered sections accordingly.

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ADD the following: “All manholes and valve boxes shall be set to ½ inch below final grade prior to paving of streets.”

401.21 ADD milling will be paid separately by the square yard. Tack Coat will be incidental to the work associated will the milling process and preparing the surface for overlay.

401.22 ADD the shouldering work required to cover the paved safety edge will be incidental to the work associated with the overlay in areas without curb. If the Contractor cannot use existing embankment material, the Contractor will be paid for the placement of aggregate base through that line item.

SECTION 403 HOT MIX ASPHALT

SECTION 405 HEATING AND SCARIFYING TREATMENT

SECTION 406 COLD ASPHALT PAVEMENT (RECYCLE)

SECTION 407 PRIME COAT, TACK COAT, AND REJUVINATING AGENT

SECTION 408 JOINT AND CRACK SEALANT

SECTION 409 CHIP SEAL

SECTION 411 ASPHALT MATERIALS

SECTION 412 PORTLAND CEMENT CONCRETE PAVEMENT

412.17 REVISE as follows “Roadway smoothness shall be tested as described below. Roadway smoothness testing will not be measured and paid for separately but shall be included in the work. The finished surface elevation of the pavement will be measured using a 10-foot straightedge both transverse and longitudinally. The Contractor shall furnish an approved 10-foot straightedge and depth gauge and provide an operator to aid the engineer in testing the finished pavement surface. Areas to be measured shall be as directed by the

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Engineer. Areas showing high spots of more than 3/16 inch in ten feet shall be marked and diamond ground until the high spot does not exceed 3/16 inch in ten feet. Additional diamond grinding shall be performed as necessary to extend the area ground in each lateral direction so that the lateral limits of grinding are at a constant offset from a line parallel to the nearest lane line or pavement edge, and in each longitudinal direction so that the grinding begins and ends at lines normal to the pavement centerline within the ground area. All ground areas shall be neat rectangular areas of uniform surface.”

SECTION 420 GEOSYNTHETICS

420.02 ADD the following: “Geogrid used for reinforcement of aggregate base course or for subgrade stabilization/separation shall meet the minimum strength and other physical properties specified in the project contract documents and shall be approved by the Engineer prior to placement.”

SECTION 421 STONE PAVING

ADD Section 421 Stone Paving to these specifications.

ADD the following:

“421.01 DESCRIPTION:

Provide complete installation of random and rectangular flagstone paving.

421.02 SUBMITTALS:

A. Mockup: construct mockup for Landscape Architect's or Engineer’s approval; 25 sq. ft.

paving on sand/aggregate base with typical joints for each stone paving pattern indicated on drawings. All mockup may be constructed as part of the work.

Unapproved work will be removed and replaced at Contractor’s expense

B. Contractor shall provide shop drawings of dimensions and cuts prior to ordering.

C. Setting and Grouting Materials: submit separate statement or notation on package labels indicating compliance with specified requirements and suitability for intended use. Submit setting and joint sand mortar color additive for approval by architect.

D. Sealants: submit supplier’s color options for selection by Landscape Architect.

E. Maintenance data: submit supplier recommended cleaning and stain removal methods and cleaning materials

F. Warranty documentation: submit warranty documentation

421.03 DELIVERY AND STORAGE:

A. Schedule deliveries to avoid delays and to prevent greater accumulation than can be suitably stored at site.

B. Store on wood skids or pallets clear of ground covered with non-staining, waterproof membrane. Wood in contact with stone must be low in resins and of species free of tannin. Place and stack skids and stones to distribute weight evenly and to prevent breakage and cracking of stones. Protect stored stones from weather with waterproof, non-staining covers on enclosures, but allow air to circulate around stones. Protect

Project Technical Specifications Page 19 edges and exposed faces from damage and from staining. Replace damaged units with new as directed. Stack in same position as intended in finished work.

C. Arrange storage in approximate order of use to avoid excessive re handling.

D. Do not store stone in drip line of existing trees to remain E. Handling: handle stone to prevent chipping, breakage, soiling or other damage. Do not use pinch or wrecking bars without protecting edges of stone with wood or other rigid materials. Lift with wide-belt type slings wherever possible; do not use wire rope or ropes containing tar or other substances which cause staining. If required, use wood rollers and provide cushion at end of wood pieces.

421.04 SUPPLEMENTAL UNIT PRICES. MEASUREMENT AND PAYMENT

A. The following items are listed for detail description and unit pricing in case of additional work needed

B. Stone paving:

1. Basis of measurement: square foot

2. Basis of Payment: includes quarrying and cutting, shop drawings, fabrication, examination, subgrade preparation, sand base, laying stone pavers, joint sealing, clean up, protection, warranty and maintenance

421.05 REFERENCES

A. American Society for Testing Materials (ASTM) ASTM C616; ASTM C33; ASTM C97.

Absorption by Weight; ASTM C97. Density; ASTM C170. Compressive strength; ASTM C99. Modules of rupture; ASTM C880. Flexure strength.

B. American National Standards Institute (ANSI)

421.06 QUALITY ASSURANCE

A. Qualifications

1. Quarry: company having adequate capacity and facilities to meet the specified requirements

2. Finishing: company equipped to perform cutting and finishing and equipped to process the material promptly on order and in strict accordance with specifications.

Evidence to this effect shall be provided by the supplier if required by the Architect.

3. Installer: company with minimum five (5) years successful experience in the installation of stone paving areas similar in size and scope to this project.

B. Preconstruction Conference

1. Conduct preconstruction conference prior to construction

2. Attendance required by: Landscape Architect, Contractor, Supplier, other parties who are involved

421.07 PROJECT/SITE CONDITIONS

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A. Remove any ice or snow formed on stonework bed by carefully applying heat until top surface is dry to touch. Remove setting bed and stonework determined to be frozen or damage by freezing conditions

B. Conform to “Recommended Practices and guide Specifications for Cold Weather Masonry Construction” by IMI.

C. Do not use frozen materials or materials mixed or coated with ice and frost. Do not use salt to thaw ice in anchor holes or slots. Do not lower the freezing point of mortar by us of admixtures or anti-freeze agents, and do not use calcium chloride in mortar or grout.

D. Heat sand and water sufficiently to maintain the temperature of mortar above 50 degrees F. Protect against freezing

421.08 WARRANTY AND REPLACEMENT

Warranty Period: Warranty Period extends two (2) years from the date of Final Acceptance. The warranty period begins anew for the replaced area and extends each time the area requires replacing.

Partial Acceptances: When the work is accepted in parts, the warranty period shall extend from each of the partial acceptances to the terminal date of the last warranty period such that all warranty periods terminate at one time.

STONE PAVING WARRANTY CONDITIONS: Warranty all stone paving areas against defects due to any cause except vandalism and acts of God. The following warranty conditions apply:

1. The contractor, by commencing the work of this Section, assumes overall responsibility, as part of his warranty of the work, to assure that all assemblies, components, and parts shown or required within the Work of this Section, comply with contract documents. The contractor shall further warrant:

a. That all components, specified or required to satisfactorily complete the installation, are compatible with each other and with the conditions of installation and expected use.

b. The overall effective integration and correctness of individual parts and the whole of the system.

c. Compatibility with adjoining existing substrates, materials and work by other trades.

d. There shall be no material failure due to improper design or installation of dimensional stone pavers. All materials are to fully perform to their normal life expectancy.

2. With the accompaniment and approval of the Landscape Architect, inspect pavers within one month of placement, flag and rest any units or areas which are out of plane, cracked, chipped or rocking. Re-set any units or areas which have settled. Apply additional sand between joints as required to fill joints. Clean up excess sand.

a. Settling tolerance: Maximum 1/16” differential between any pavers or surrounding edge materials.

b. Inspect and reset pavers again at six months, twelve months, and twenty-four month for final acceptance.

3. If stone paving areas fail after having been replaced previously, area shall be replaced until it is approved. The warranty period begins anew and extends each time an area

Project Technical Specifications Page 21 requires replacing. Replacement stone shall be on the same kind, condition and quality as original stone and subject to all requirements in this specification.

4. All expenses incurred in the replacements shall be borne by the Contractor.

5. Make replacements within seven days of notification by Architect.

6. Warranty: Furnish manufacturer’s warranty co-signed by Contractor which includes all labor and materials to replace all cracked, damaged, failed and spalled pavers and reset any unit or area which has settled or heaved out of plane within a period of two

(2) years from date of final acceptance. Make final repairs/replacements before the expiration of the warranty period as directed by the Owner and/or Architect.

421.09 SEQUENCING AND SCHEDULING

A Coordination: Coordinate with work in other sections to insure the following:

1. Sleeving and Conduits: Install prior to pouring of concrete slab or laying of aggregate base and beginning of stone work.

2. Drainage: Adjust rims of drain structures prior to installation of concrete slab and stone work.

3. Sealants:

a. Coordinate sealants with concrete subbase work. Verify adhesive and primer types by providing substrate samples for testing by the sealant manufacturer.

Periodically check sealants in place for adhesion using methods recommended by sealant manufacturer.

b. Promptly replace sealant which fails to develop proper adhesion, or which fails to cure.

PART 2 - MATERIALS

421.10 CEMENT:

Portland Cement: Conform to ASTM C-150, Type 1.

421.11 SAND:

Clean, non-staining ASTM C-144.

421.12 WATER:

Fresh, clean non-alkaline water as available from owner.

421.13 HYDRATED LIME:

"Magnolia" Type S lime, ASTM C-207, or approved equal.

421.14 WATERPROOFING COMPOUND:

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Omicorn as made by Master Builders Co. or approved equal.

421.15 FINISHED STONE:

A. Stone Type:

1. 12″ x varies’ Squared Stone on Sand and Aggregate Base: 50% Colorado Buff Sandstone and 50% Flagcreek Cobble mixture, random regular, guillotine snap cut, light natural cleft surface, and locally available stone. Each have light texture natural finish, 2-1/4” to 2-5/8” thick high density paving, set in pattern per details.

Pieces no smaller than 11 3/4” x 11 ¾”, except as detailed near trees. Color shall be approved by Landscape Architect prior to installation. Colorado Buff shall match Flagcreek Cobble in light tan color and appearance. Stone less than 2” thick will not be accepted.

2. Random Size Stone Paving on Sand and Aggregate Base: 50% Colorado Buff Sandstone and 50% Flagcreek Cobble mixture, random size, guillotine snap cut, light natural cleft surface, and locally available stone. Each have light texture natural finish, 2-1/4” to 2-5/8” thick high density paving, set in square grid pattern.

Minimum size to be 6” d. only placed around trees. Color shall be approved by Landscape Architect prior to installation. Colorado Buff shall match Flagcreek Cobble in light tan color and appearance. Stone less than 2” thick in any place will not be accepted.

B. Supplier: Provided from single source only. Each stone type must come from the same quarry. Gallegos Corporation or approved equal

421.16 MORTAR MIXES:

Comply with ASTM C-270. Class "N" Mortar using Portland Cement.

One Part Portland Cement

One Part Lime Five Parts Sand

Add waterproofing compound per manufacturer's recommendation

421.17 SEALANT:

Polysulfide, equal to Sonneborn "Sonolastic Sealant". Color and brand, as approved by

Landscape Architect in field mockup.

421.18 JOINTS

A. Expansion joints:

1. Premolded Joint Filler: ASTM D1751, non-extruding and bituminous type resilient filler, compatible with sealant and backer rod.

2. Sealant Backer Rod: Compressible polyethylene foam rod or other flexible, permanent, durable non-absorptive material as recommended by joint sealer manufacturer for compatibility with joint sealer.

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3. Joint Sealer:

a. Type: Multi-component polyurethane sealant, FS TT-S-00227, Class A, type as recommended by manufacturer for exterior locations subject to foot traffic.

b. Product: ASTM C290, non-snag sealant "Sonolastic Sealant Two-Part" by

Sonneborn Building Products Division, (612) 835-3434 or "Dynatred" by Pecora Corporation, (214) 278-8158, or equal.

c. Color: Match adjacent grout.

421.19 SAND SETTING

A. Sand Leveling Course: Clean sharp plaster sand with 100 percent passing #4 sieve and a maximum of 3 percent passing #200 sieve size. Sand shall not have any clay content.

B. Herbicide: "Chipco Ronstar G" as manufactured by Rhone-Poulenc, Inc., (201) 277- 0100 or "Devrinol" by Stauffer Chemical Co., (415) 544-9610, or equal.

421.20 TOLERANCES

A. Thickness: the variation from nominal thickness as specified shall not exceed the following:

Thickness Variation

¾” up to 1 ½”: ± 1/8” Over 1 ½” up to 2 ½”: ± ¼”

Over 2 2/12” up to 3 1/2”: ± 3/8”

Over 3 ½”: ± ½”

B. Face Dimensions: Maximum variation in the dimension of any piece shall be ¼ of the specified bed joint width: however, in any case not less than ± 1/16”, whichever is more stringent.

C. Beds and Joints: Cut bed and joint surfaces as follows: ¼” beds and joints for sandstone 3” or less in thickness: sawn square back from the face at least two-thirds of the piece thickness. From that point the bed may fall under square not more than 1 inch.

PART 3 - EXECUTION

421.21 GENERAL:

A. Mix mortar only in quantities as are needed for immediate use during the next 30 minutes. Retempering is not permitted.

B. Dampen stone in hot weather immediately before laying but without having surface water.

C. Lay stone in full bed of mortar with head and edge joints completely filled.

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D. Cut stone where necessary for fitting or bonding with a power saw. The finish cut shall be lightly chiseled to match guillotine snap cut look.

E. Maximum variation in alignment of joints and other conspicuous line shall be ¼” in 20’.

F. Set stone in patterns indicated with level surface and uniform joints of width indicated.

421.22 INSTALLATION ON CONCRETE:

A. Base Preparation: After examination and prior to placing the setting bed, broom and clean protection or drainage course (varies – see Drawings). Scrub cement grout onto surface of protection/drainage course immediately prior to spread of setting bed mortar.

B. Slurry Bond Coat: Apply a slurry bond coat, as specified, on the substrate to enhance the bond of thickset material.

C. Setting Bed: Spread and compact setting mortar in three stages to full thickness indicated on Drawings. Screed setting mortar to the required level and grades.

1. Spread no more setting mortar than will remain plastic for setting of paving units.

2. Irregularities in line and grade of concrete base slabs may be corrected by varying bedding depth when approved by Architect.

3. Spread wire reinforcement in setting beds, 1.0” thick or more, and as required by Industry Standards or Installer warranty.

D. Slurry Bond Coat: Apply a slurry coat, as specified, on the thickset to enhance the bond of the stone.

E. Stone Paver Cleaning: Stone paving units to be free from stain, dirt, or dust. If necessary scrub face with mild soap and clean water applied with still fiber brushes.

F. Laying Stone Pavers:

1. Execute stonework by skilled mechanics, and employ skilled stone fitters at the site for necessary field cutting as stone is set.

2. Conform to requirement of ANSI A108 and TCA Method F103.

3. Installation: Set paving in strict accordance with pattern requirements of final shop drawings and Drawings. Set units straight and true to required line.

4. Place units in fresh mortar while surface is wet and tacky and beat in line with block or mallet to firm imbed in the mortar ad level each piece with adjoining piece.

5. Adjust to obtain uniform joints of 3/8” (dimension).

6. Reset units having a hollow sound after being laid to provide solid backing. Reset units disturbed in making replacement of correcting variations.

7. Install specified joint filler at expansion and control joints as paving units are laid.

Keep top edge below exposed face of paving units as necessary for sealant installation.

8. Keep units clean and rake out joints between stones for joint mortar.

9. Where cold joints have been allowed to form, apply slurry bond coat mortar to previously set surfaces prior to additional unit installation.

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10. Contiguous Work: Provide openings and other spaces as shown or required for contiguous work. Close-up openings in stonework after other work is in place. Use same material and set to match surrounding stonework.

11. Pattern shall match color ratio desire by Landscape Architect.

12. Refer to the drawings for edge details.

13. Start from middle for all stone paving areas.

G. Cleaning: Remove all unused cut pieces, shaving, and dust from pavers from paved area prior to filling joints.