8-01. BID-227-25 Project Specifications.pdf

Project Specifications

120th Street Multimodal Safety Improvement:

Overlook Drive to Dillon Road

Boulder County Procurement

PO Box 471 Boulder, CO 80306-0471

Bid Set

Prepared by:

Otak, Inc.

371 Centennial Parkway, Suite 210

Louisville, CO 80027

(303) 444-2073

120th Street Multimodal Safety Improvement (Overlook to Dillon) Bid Set Boulder County September 2025

Overlook Drive to Dillon Road

Boulder County

The Colorado Department of Transportation (CDOT) 2025 Standard Specifications for Road and Bridge Construction controls construction of this project. The following special provisions supplement or modify the Standard Specifications and take precedence over the Standard Specifications and plans.

Project Special Provisions Index Pages Project Special Provisions Index .............................................................. 1-2 Standard Special Provision Index Notice to Bidders Commencement and Completion of Work Revision of Section 101 Definitions and Terms ............................................. 6-7 Revision of Section 102 Project Plans and Other Data Revision of Section 103 Award and Execution of Contract Revision of Section 104 Scope of Work Revision of Section 105 Control of Work Revision of Section 106 Control of Material Revision of Section 107 Safety, Health, and Sanitation Provisions Revision of Section 107 Performance of Safety Critical Work ......................... 14-15 Revision of Section 107 Public Convenience and Safety Revision of Section 107 Protection and Restoration of Property and Landscape Revision of Section 107 Contractor’s Responsibility of Work Revision of Section 107 Fire Protection Plan ............................................ 19-21 Revision of Section 107 Air Quality Control Revision of Section 108 Prosecution and Progress ...................................... 23-24 Revision of Section 201 Clearing and Grubbing Revision of Section 202 Removal of Pavement Marking Revision of section 202 Removal of Portions of Present Structure (Class 2 and 3) . 27-31 Revision of section 202 Sandblasting Reinforcing Steel Revision of Section 203 Excavation and Embankment .................................. 33-35 Revision of Section 207 Topsoil Revision of Section 208 Erosion Control Revision of Section 209 Watering and Dust Palliatives Revision of Section 212 Seeding, Fertilizer, Soil Conditioner, and Sodding ......... 39-46 Revision of Section 214 Landscape Maintenance ........................................ 47-48 Revision of Section 216 Soil Retention Covering ........................................ 49-54 Revision of Section 403 Hot Mix Asphalt .................................................. 55-57 Revision of Section 504 Retaining Wall (Boulder) ....................................... 58-61 Revision of Section 625 Construction Surveying Revision of Section 626 Public Information Services.................................... 63-65 Revision of Section 627 Pavement Markings

Project Special Provisions Index (Continued) Pages

Revision of Sections 627 and 713 Glass Beads for Pavement Marking Revision of Section 630 Construction Zone Traffic Control Revision of Section 703 Aggregates Force Account Items Traffic Control Plan – General ............................................................. 71-72 Utilities ........................................................................................ 73-75

Overlook Drive to Dillon Road

Boulder County

CDOT Standard Special Provision Index

Name Date Number of Pages Revision of Section 105 – Project First (June 11, 2025) 4 Revision of Section 105 – Dispute Resolution, Dispute Review Board and Claims for Unresolved Disputes

(June 11, 2025) 24

Revision of Section 108 – Liquidated Damages (July 1, 2025) 1 Revision of Section 207 – Topsoil (July 1, 2025) 9 Revision of Section 212 – Soil Amendments, Seeding, and Sodding

(July 1, 2025) 25

Revision of Section 401 – Composition of Mixtures

– Voids Acceptance

(July 1, 2025) 1

Revision of Section 401 – Plant Mix Pavements – General (Subsection 401.17)

(July 1, 2025) 4

Revision of Section 401 – Reclaimed Asphalt Pavement

(July 1, 2025) 2

Revision of Section 401 – Tolerances for Hot Mix Asphalt (Voids Acceptance)

(July 1, 2025) 1

Revision of Section 627 – Pavement Marking Paint (July 1, 2025) 15 Affirmative Action Requirements Equal Employment Opportunity

(July 1, 2025) 13

Special Construction Requirements, Fire Protection Plan

(July 1, 2025) 2

Notice to Bidders

Notice: The proposal guaranty shall be a certified check, cashier’s check or bid bond in the amount of 10% of the Contractor’s total bid.

Both a payment and a performance bond are required for this project and must equal 100% of the proposed cost. Please include the cost of this bonding into the total proposed cost.

Bidders must be prequalified with the Colorado Department of Transportation to bid the project. Proposals are requested for the furnishing of all labor and materials on a Unit basis.

Contractor hereby proposes to furnish all labor, machinery, equipment, materials and supplies, and to sustain all the expense incurred in doing the work per the proposal schedule, and in pursuance of a certain advertisement of the County Commissioners, County of Boulder, of the State of Colorado, and in accordance with the full details, Plans, and Specifications as prescribed by said County Engineer.

Pursuant to subsections 102.04 and 102.05, it is recommended that bidders on this project review the work site and plan details.

The Boulder County Public Works Department is seeking bids for the 120th Street Road Widening project. The primary work consists of full depth asphalt replacement, storm sewer, modular block gravity retaining wall, grouted rock wall, structure excavation and rock excavation, guardrail replacement, and signing and striping.

Commencement and Completion of Work

The Contractor shall commence work under the Contract on or before the 15th day following Contract execution unless such time for beginning the work is changed by the Project Engineer in the "Notice to Proceed."

The Contractor shall complete all work within 120 working days in accordance with the “Notice to Proceed” and the punch list items shall be completed within and additional 10 working days. Punch list work shall be done efficiently and effectively so as not to unnecessarily delay work.

Work may be suspended for cold or inclement weather that would not allow for asphalt paving or would impact the quality of the final work. No additional payment will be made for remobilization if the project is suspended due to weather.

If work is suspended, the Contractor shall continue coordination with Boulder County Maintenance to insure safe travel of the public through the project site. If the project is suspended for an extended period, the Contractor shall leave the project in a state that would not require temporary traffic control during the suspension.

Per the Boulder County Stormwater Quality Permit (SWQP) requirements, no earthwork can occur except that which is required to facilitate the installation of control measures until all control measures have been inspected by the County.

Contractor’s schedule shall include this process. Working days will not be counted between control measure installation and County inspection.

See Project Special Provision, “Revision to Section 108 Prosecution and Progress” for more information and schedule information for the Salient features on the project.

Revision of Section 101 Definitions and Terms

Certain terms utilized in the latest edition of the Colorado Department of Transportation Standard Specifications for Road and Bridge Construction shall be interpreted to have different meanings within the scope of this Contract. A summary of redefinitions follows:

Section 101 of the Standard Specifications is hereby revised for this project as follows:

Subsection 101.22: “Contractor” shall mean prefabricator and/or contractor as described in subsection 101.23

Subsection 101.28: “Department” shall mean Boulder County, Colorado (where applicable).

Subsection 101.29: “Engineer” shall mean County Engineer, Boulder County, Colorado or designated representative (where applicable).

Subsection 101.36 shall be replaced with the following:

When New Year’s Day, Cesar Chavez Day, Independence Day, or Christmas Day falls on a Sunday, the following Monday shall be considered a holiday. When one of these days falls on a Saturday, the preceding Friday/Monday shall be considered a holiday.

Holidays recognized by Boulder County are:

• New Year’s Day

• Dr. Martin Luther King, Jr. Day

• President’s Day

• Memorial Day

• Independence Day

• Labor Day

• Juneteenth (June 19th)

• General Election Day (Even years)

• Veterans Day

• Thanksgiving Day

• Friday after Thanksgiving Day

• Christmas Eve – 1/2 Day Christmas Eve (beginning at noon, only if day falls on Tuesday - Thursday); Full Day Christmas Eve (only if day falls on Monday)

• Christmas Day

• New Year’s Eve - 1/2 day New Year's Eve (beginning at noon, only if day falls on Tuesday - Thursday); Full day New Year’s Eve (only if day falls on Monday)

Revision of Section 101 Definitions and Terms

Subsection 101.39: “Laboratory” shall mean Boulder County, Colorado or their designated representative.

Subsection 101.51: “Project Engineer” shall mean Boulder County’s duly authorized representative who may be a Boulder County or an employee of a consulting engineer (consultant) under contract to Boulder County (where applicable).

Subsection 101.51 (a): “CDOT Project Engineer” shall be replaced with “Project Engineer” within these specifications. When applicable and when these documents reference a CDOT engineer, this reference shall be construed to mean Project Engineer.

Subsection 101.51 (b): shall be replaced with the following:

“Consultant Project Engineer”. The consultant employee under the responsible charge of the consultant’s Professional Engineer who is in direct charge of the work and is responsible for the administration and satisfactory completion of the project.

The Consultant Project Engineer’s duties are delegated by the Project Engineer in accordance with the scope of work in the consultant’s contract with Boulder County.

The Consultant Project Engineer is not authorized to approve Contract Modification Orders.

Subsection 101.58 “Region Transportation Director” shall mean Boulder County Engineer, Boulder County, Colorado or designated representative (where applicable).

Subsection 101.76 “State” shall mean Boulder County, Colorado (where applicable).

Revision of Section 102 Project Plans and Other Data

Section 102 of the Standard Specifications is hereby revised for this project as follows:

Subsection 102.04 shall be replaced with the following:

Any change to proposal forms, plans, or specifications prior to the opening of proposals will be issued by the Department by posting to bouldercounty.org and to bidnet.com and by emailing directly to vendors on the vendor list, Colorado Unified Certification Program DBE Directory vendor list and Minority Business Development Agency which emails them to their vendor list. Certain individuals are named in the project specifications who have authority to provide information, clarification or interpretation to bidders prior to opening of proposals. Information obtained from persons other than those named individuals is invalid and shall not be used for bidding purposes.

Subsection 102.05 shall include the following:

Boulder County will provide electronic files of drawings, the sample contract document, the project technical specifications in .PDF format, online at the designated internet bid advertisement site, and they will be considered as the official bid set and record set.

Revision of Section 103 Award and Execution of Contract

Section 103 of the Standard Specifications is hereby revised for this project as follows:

Subsection 103.01 shall be replaced with the following:

Consideration of Proposals. After the proposals (bids) are opened and read, they will be evaluated, and the Contract awarded or rejected in accordance with the “Rules” referenced in subsection 102.01.

Revision of Section 104 Scope of Work

Section 104 of the Standard Specifications is revised for this project as follows:

Subsection 104.01 shall include the following:

Boulder County and its partners have funding to provide roadway paving and grading upgrades as a part of their reoccurring capital improvements projects. The proposed work includes, but is not limited to, earthwork and erosion control, removal and milling of asphalt pavement, overlay and full depth asphalt replacement, bridge deck repaving, coordination with private utility companies for underground utility relocations, Overhead Power, signing, striping, earthwork and grading, seeding, fencing, guardrail replacement, and storm drainage facilities.

Subsection 104.02 (b) shall include the following:

The Contractor is required to complete the Contract with sustained work efforts once he begins the project. The Contractor will coordinate work activities with the Engineer to minimize potential safety hazards to personnel and materials. Work may be suspended for cold or inclement weather that would impact the quality of the final work. No additional payment will be made for remobilization if the project is suspended.

Subsection 104.04 shall include the following:

Employee vehicle parking is prohibited where it conflicts with safety, access or flow of traffic. The Contractor is responsible for obtaining, coordinating and maintaining acceptable parking and staging areas for the duration of the construction activities.

This shall not be paid for separately but shall be included in the work.

Revision of Section 105 Control of Work

Section 105 of the Standard Specifications is revised for this project as follows:

Subsection 105.01(f) shall be replaced with the following:

(a) Construction Drawings. The Contractor shall keep one set of plans, reviewed shop drawings, working drawings (red-lined), and other submittals available on the project site at all times. This set shall be defined as the “construction drawings.” The Contractor shall note on these construction drawings all changes and deviations from the work shown on the plans, shop drawings, working drawings, and other submittals. The construction drawings shall be kept current as the work progresses and notations shall be made within seven days of the change or deviation.

(b) Record Set. Red-lined Construction Drawings are not considered the Record Set. The Contractor shall provide a Record Set per Standard Special Revision of Section 101 – Record Set.

Upon completion of the work and prior to final payment, the Record Set and a CAD file containing the final pipe inverts and sign locations shall be submitted to the Engineer.

Subsection 105.07 shall delete second sentence in first paragraph:

Replace with:

The pavement smoothness category shall be MRI Category A.

Subsection 105.07 (d) shall include the following:

Incentive adjustments for smoothness will not be made. Corrective work will be required based upon Table 105-12.

Revision of Section 106 Control of Material

Section 106 of the Standard Special Provisions is hereby revised for this project as follows:

Subsection 106.03 shall include the following:

Testing will be done in accordance with Boulder County Public Work Department’s Minimum Guideline for Sampling and Testing.

The Contractor will be responsible for establishing, documenting, and implementing a Quality Control Plan. The Quality Control Plan shall include all procedures necessary for the Contractor to control the quality of its production processes to meet the requirements of the Contract. The Contractor’s Quality Control Plan shall include a testing and inspection schedule to control the production processes.

Boulder County will provide a qualified Construction Quality Assurance team to perform Quality Assurance (QA) testing, auditing and acceptance testing. The QA staff shall remain independent from the Contractor’s production and Quality Control (QC).

The Boulder County Construction Inspection team and/or testing firm will perform on-site inspection and testing of the construction elements of the work to verify that all work has been constructed in conformance with the Contract requirements.

Subsection 106.05 shall include the following:

For this project, the Contractor process control testing of hot mix asphalt is voluntary.

Revision of Section 107 Safety, Health, and Sanitation Provisions

Section 107 of the Standard Specifications is hereby revised for this project as follows:

Subsection 107.06 shall be revised to include the following:

The Contractor and any subcontractor shall not require any laborer or mechanic employed in performance of the Contract to work in surroundings or under working conditions which are unsanitary, hazardous, or dangerous to his health or safety, as determined under construction safety and health standards (Rules and Regulations of the Federal Occupational Safety and Health Act of 1970 (OSHA) and as amended).

All facilities and work conditions shall comply with Colorado and local Health Department Regulations and with OSHA requirements.

Performance of Safety Critical Work

Section 107 of the Standard Specifications is hereby revised as follows:

Add Subsection 107.061 immediately following subsection 107.06 as follows:

107.061 Performance of Safety Critical Work.

The following work elements are considered safety critical work for this project:

(1) Earthwork

(2) Traffic Control

(3) Utility relocations

(4) Asphalt paving operations

(5) Construction activities adjacent to active roadway.

The Contractor shall submit, for record purposes only, an initial detailed construction plan that addresses safe construction of each of the safety critical elements. The detailed construction plan shall be submitted two weeks prior to the safety critical element conference described below. The construction plan shall be stamped “Approved for Construction” and signed by the Contractor. The construction plan will not be approved by the Engineer.

(1) The Construction Plan shall include the following:

(2) Safety Critical Element for which the plan is being prepared and submitted.

(3) Contractor or subcontractor responsible for the plan preparation and the work.

(4) Schedule, procedures, equipment, and sequence of operations, that comply with the working hour limitations

(5) Additional actions that will be taken to ensure that the work will be performed safely.

(6) The construction plan shall address how the Contractor will handle contingencies such as:

a. Unplanned events (storms, traffic accidents, etc.)

b. Work that cannot be completed in time for the roadway to be reopened to traffic

c. Replacement of workers who don’t perform the work safely

d. Equipment failure

e. Other potential difficulties inherent in the type of work being performed

Revision of Section 107

Performance of Safety Critical Work

When ordered by the Engineer, the Contractor shall immediately stop safety critical work that is being performed in an unsafe manner or will result in an unsafe situation for the traveling public. Prior to stopping work, the Contractor shall make the situation safe for work stoppage. The Contractor shall submit an acceptable plan to correct the unsafe process before the Engineer will authorize resumption of the work.

When ordered by the Engineer, the Contractor shall remove workers from the project that are performing the safety critical work in a manner that creates an unsafe situation for the public in accordance with subsection 108.05.

Should an unplanned event occur, or the safety critical operation deviate from the submitted plan, the Contractor shall immediately cease operations on the safety critical element, except for performing any work necessary to ensure worksite safety, and provide proper protection of the work and the traveling public. If the Contractor intends to modify the submitted plan, he shall submit a revised plan to the Engineer prior to resuming operations.

All costs associated with the preparation and implementation of each safety critical element construction plan will not be measured and paid for separately but shall be included in the work. Temporary shoring, if required, shall be included in the cost of Removal of Structure.

Nothing in the section shall be construed to relieve the Contractor from ultimate liability for unsafe or negligent acts or to be a waiver of the Colorado Governmental Immunity Act on behalf of the Department.

Public Convenience and Safety

Section 107 of the Standard Specification is hereby revised as follows:

Subsection 107.07shall include the following:

Access to businesses and all bus stop facilities (including, but not limited to, bike racks, bike lockers, accessible ramps, bikeways) shall always be maintained.

Protection and Restoration of Property and Landscape

Section 107 of the Standard Specification is hereby revised as follows:

Subsection 107.12 shall include the following:

The Contractor shall save existing vegetation, except for those that must be removed to accommodate construction of the project.

The Contractor shall perform all the work in such a manner that the least environmental damage will result. Any questionable areas or items shall be brought to the attention of the Engineer for approval prior to vegetation removal or any damaging activity. Damaged or destroyed trees, shrubs, or wetlands, which could have been saved, shall be replaced at the expense of the Contractor.

If any trees or shrubs are to be removed between April 1st and August 31st, a nesting bird survey must be completed for active nests. The survey will be conducted by the County’s designated Wildlife Biologist. If an active nest(s) is found, no work may be done within 50 feet of the nest(s) until Boulder County is notified and further direction of construction limitations have been defined. These requirements are in place to abide by the Migratory Bird Act of 1918.

Contractor’s Responsibility of Work

Section 107 of the Standard Specification is hereby revised as follows:

Subsection 107.17 shall include the following:

The Contractor shall be responsible for any damage to their work arising from running water from either a natural source or from landscape watering at no additional cost to the contract.

The Contractor shall be responsible for any damages done by the Contractor that is outside the scope of this work, including but not limited to irrigation facilities, landscaping, fencing, bus stop facilities, parking lots, County open space, or private property.

Fire Protection Plan

Section 107 of the Standard Specifications is hereby revised as follows:

Subsection 107.18 shall be deleted and replaced with the following:

107.18 Fire Protection Plan. The following work elements are considered safety critical work for this project:

(a) Fire Protection Plan. Prior to start of work, the Contractor shall submit a Fire Control Plan in writing to the Engineer and Local Fire Authority for approval.

The plan shall include the following:

(1) The name and contact information of a Fire Control Coordinator who shall be assigned to the project.

(2) A 24-hour Emergency Contact List which, at a minimum, includes Project Superintendent, Project Foreman and Project Traffic Control Supervisor.

(3) Methods that will be employed if a fire is encountered or started during construction activities within the project limits.

(4) Specific fire prevention precautions, and the required fire mitigation equipment, for every activity which has the potential for starting a fire. At a minimum the plan shall address prevention planning related to use of heavy equipment, vehicles, hand tools, storage and parking areas.

(5) Specific precautions for fueling operations.

(6) Provisions for field safety meetings. The Contractor shall conduct field safety meetings (also known as toolbox or tailgate meetings) at least once per week to include a local Fire Authority Representative. The Contractor shall encourage participation by all persons working at the project site.

Participants shall discuss specific fire prevention precautions for construction activities.

(b) Open Burn Exemption. A burn exemption may be requested by the Contractor from the Boulder County Sheriff’s Office if current fire restrictions are in place.

The fire restrictions Prohibit:

(1) Building, maintaining, attending, or using an open fire, campfire or stove fire (including charcoal barbecues and grills) on public land;

(2) Use of all personal fireworks;

(3) Shooting or discharging firearms for recreational purposes, except for hunting with a valid and current hunting license on public land;

Revision of Section 107

Fire Protection Plan

(4) Smoking, except in an enclosed vehicle or building, a developed recreation site, or while stopped in an area at least three feet in diameter that is barren or cleared of all flammable materials;

(5) Operating a chainsaw without a USDA or SAE-approved spark arrester properly installed and in effective working order. A chemical, pressurized fire-extinguisher must be kept with the operator, and at least one round-point shovel with an overall length of at least 35 inches must be readily available for use;

(6) Welding or operating acetylene or other open-flame torches, except in cleared areas of at least 10 feet in diameter, and with a chemical, pressurized fire-extinguisher immediately available for use; and

(7) Using an explosive.

Welding/Torching/Cutting/Drilling. If work at field locations is required, the work shall be done at a location where all flammable material has been cleared within a 30-foot radius and approved by the local Fire Authority.

Spark Arrestors. All diesel and gasoline powered engines, both mobile and stationary, shall be equipped with serviceable spark arrestors each gasoline power saw shall be provided with a spark screen and a muffler in good condition. Spill-proof metal safety cans shall be used for refueling. Approved and inspected by the local Fire Authority.

Storage and Parking Areas. Batch plant areas, equipment service areas, parking areas, gas and oil drum storage areas, and explosive storage areas shall be cleared of all flammable materials for a distance of 50 feet. Small stationary engine sites shall be cleared of all flammable material for distance of 20 feet. Other mitigation methods may be used as approved by the Engineer and applicable codes.

(c) Fire Control Coordinator Responsibilities. The Fire Control Coordinator shall:

(1) Be the primary contact for the local Fire Authority and Project Engineer

(2) Implement the Fire Control Plan.

(3) Monitor, manage, and adjust the Fire Control Plan as needed as construction work progresses.

(4) Document in a letter to the Engineer and Local Fire Authority changes to the Fire Control Plan.

Revision of Section 107

Fire Protection Plan

(5) Contact local firefighting authorities 3 days in advance when a hazardous operation is scheduled. Inspection due to construction activities within project limits may be required.

(6) Coordinate fire control, mitigation and possible suppression activities until authorities arrive, including the evacuation of staff.

When the Fire Control Coordinator cannot be on the project site, he shall designate a person who is on site to serve as the Fire Control Coordinator. The Fire Control Coordinator, or his designee, shall always be on site while work is performed.

(d) Open Burning During Weather Events. During any of the following weather events, open burning is not permitted in unincorporated Boulder County from time of issuance until midnight in which the event expires: Red Flag Warning, High Wind Warning, High Wind Watch and Fire Danger Warning. Check the local forecast for up to date information issued by the National Weather Service.

This is per Boulder County Ordinance 2018-1, “An Ordinance Repealing and Replacing Boulder County Ordinance 2006-2 and Authorizing the Declaration of Open Fire Bans by the Board of County Commissioners or the County Sheriff.”

The National Weather Service issues weather statements to inform area firefighting and land use management agencies that conditions are ideal for wildland fire ignition and propagation (Red Flag Warning, High Wind Warning, High Wind Watch, Fire Danger Warning).

For this standard special provision, smoking is an open flame and shall be included in the definition of open burning, which is not permitted for the above listed weather events. Any smoking or lighting of items outside or within a vehicle with open windows is not permitted on the project site or within 500 feet of the project’s limits of disturbance. With the approval of the Engineer, who consults with the local Fire Authority, a designated smoking area may be established.

No additional payment or compensation will be paid to the Contractor during any weather events associated with open burning and include Red Flag Warning, High Wind Warning, High Wind Watch, Fire Danger Warning. Delays may be counted as an excusable delay per Standard Specification 108.08 or at the discretion of the Engineer.

(e) Costs. All costs associated with the preparation and implementation of the Plan and compliance with all fire protection provisions and requirements will not be measured and paid for separately but shall be included in the work.

Air Quality Control

Section 107 of the Standard Specifications is hereby revised for this project as follows:

Subsection 107.24 shall include the following:

Equipment Emissions. Boulder County projects shall meet or exceed current Colorado Air Quality standards. The project work shall be performed using practices that minimize air quality detriments during construction. All the standards below shall be followed to improve air quality related to this project:

(a) Emissions standards:

(1) Optimally, electric or hybrid powered equipment or vehicles will be used on all projects.

(2) Equipment engines shall be compliant with the most recent Environmental Protection Agency (EPA) requirements.

(3) Contractors are required to maintain a minimum emissions level for diesel fueled equipment at a Tier 3 level.

(4) Contractors shall provide certification of compliance with diesel emissions standards. Failure to do so will result in immediate stoppage of work and is a non-excusable delay per subsection 108.08(c)2.

(5) All diesel vehicles, construction equipment, and generators on site shall be fueled with ultra-low sulfur diesel fuel (ULSD) or a biodiesel (B20) blend approved by the original engine manufacturer with sulfur content of 15 ppm or less.

(b) Proximity. Any project within 1000 linear feet of a residence or regular gathering location of multiple people (i.e., schools, parks, places of worship, commercial buildings, etc.) is required to have either electric, hybrid or Tier 4 diesel powered equipment or vehicles.

(c) Exemption. Emergency equipment is exempt from this specification. All reasonable effort will be made to replace equipment placed in service at the beginning of the emergency work with equipment as specified above as soon as possible.

(d) Definition. Vehicle, for the purposes of this specification, is defined as any diesel-powered company owned car or truck. It does not apply to personal vehicles.

(e) Cost. Unless shown otherwise in the bid tabulation for this project, costs to achieve this specification will be included in the overall cost of the project.

Revision of Section 108 Prosecution and Progress

Section 108 of the Standard Specifications is hereby revised for this project as follows:

Subsection 108.03(b) shall include the following:

The Contractor shall present a CPM baseline schedule to the Engineer at least three

(3) working days prior to the preconstruction conference. This CPM baseline schedule shall show the major features of the project through completion.

Salient features to be shown on the Contractor's progress schedule are:

1. Traffic Control

2. Mobilization/ Construction Surveying

3. Removals and Erosion Control

4. Asphalt Milling

5. Earthwork Operations

6. Storm Sewers and Inlets

7. Site Grading

8. Asphalt Paving and Overlay

9. Bridge Deck Repair

10. Bridge Railing Replacement

11. Signing and Striping

12. Traffic Restoration

13. Site Restoration and Cleaning

Meetings will be required to review progress and plan upcoming activities. The Traffic Control Supervisor, the Erosion Control Supervisor and representatives from the Contractor and all active subcontractors shall attend the meetings as necessary. Such meetings will be required on a weekly basis at a time to be determined by the Engineer and the Contractor.

At the weekly progress meetings, the Contractor shall, a written statement of planned activities and anticipated inspection, testing and surveying requirements for the upcoming three (3) weeks. The Contractor shall provide a 24-hour notice to the Engineer if the Contractor elects to change a planned activity.

The Contractor must complete all aspects of the project including punch-list items within an approved not-to exceed period indicated in the Project Special Provision “Commencement and Completion of Work” or liquidated damages per the table included in Section 108.09 of the CDOT Standard Special Provisions will be incurred.

Revision of Section 108

Prosecution and Progress

Subsection 108.05 shall include the following:

All work performed by the Contractor or any of his agents shall be accomplished during the established working hours of 8:00 a.m. and 4:00 p.m., Monday through Friday. Neither the Contractor nor his agents shall work outside of the daily working hours without prior approval by the Engineer.

If the Contractor receives approval to work additional hours beyond the normal working hours or days in Section 108.05 above for his convenience, the Contractor shall reimburse the County for the cost of providing additional engineering and inspection services. The reimbursement to the County will be at a rate of $125.00 per hour for each County employee and $175.00 per hour for each consultant required to be on the job site. This cost will be deducted from any money due the Contractor.

Payment for unauthorized work outside working hours will be denied.

Revision of Section 201 Clearing and Grubbing

Section 201 of the Standard Specifications is hereby revised for this project as follows:

Subsection 201.01 shall be revised as follows:

No burning of perishable material shall be allowed. Removal of detached concrete, removal of fallen trees shall be removed and discarded as Clearing and Grubbing.

Removal of all other items depicted on the plans to be removed, which do not have a pay item, shall be included under Clearing and Grubbing. Removal of Trees that are six (6) inches or less in diameter shall be included under Clearing and Grubbing.

Subsection 201.02, second paragraph shall be replaced as follows:

Clearing and Grubbing shall encompass the area as shown on the plans or as designated by the Project Engineer.

Subsection 201.02, seventh paragraph shall be replaced as follows:

No deleterious material, asphalt or other debris shall be buried within the project limits, unless specified otherwise on the plans.

Subsection 201.02 shall include the following:

It is the responsibility of the Contractor to visit the site and determine the resources necessary to clear and grub the project limits, per the design specifications, and no additional compensation will be allowed thereafter.

Clearing and Grubbing shall be at a minimum two (2) feet beyond the edge of existing asphalt pushed onto road surface and hauled off site or as designated by the project engineer.

Payment will be made under:

Pay Item Pay Unit

Clearing and Grubbing Acre

Revision of Section 202 Removal of Pavement Marking

Sections 202 of the Standard Specifications are hereby revised for this project as follows:

Subsection 202.05 Removal of Pavement Markings shall include the following:

Pavement Markings to be removed shall be marked by the Contractor or Subcontractor no less than 48 hours prior to removal. The Department shall review and approve the pavement markings to be removed prior to the work. All Removal of Pavement Markings shall be completed prior to permanent striping layout. All pavement markings removed shall become the property of the Contractor and disposed of properly offsite.

Removal of Portions of Present Structure (Class 2 and 3)

Revise Section 202 of the Standard Specifications for this project shall include the following:

Description

This work consists of saw cutting, removing, and disposing of existing deteriorated bridge deck and approach slab concrete. Removal operations shall be conducted so that the traveling public is protected, and so that interference with the traveling public using the structure is minimized.

Perform the applicable classes of removal as defined in the plans. The Engineer will determine the locations and limits of removal.

Construction Requirements

(a) General:

At least 10 working days before beginning removal, the Contractor shall submit a method statement to the Engineer with details of the removal operations including the means, methods, sequence of removal, tools, and equipment to be used.

The Contractor’s Method Statement shall also include proposed methods used to:

• Determine the locations and limits of deteriorating concrete.

• Prevent debris from falling to the ground or waterways below the structure.

• Protect the traveling public using the structure, and adjacent to the structure, from airborne debris generated by the removal operations.

The Engineer must approve all removal operations, methods, and equipment before the work begins.

The Contractor shall control dust and run-off per applicable governmental regulations. The Contractor is responsible for disposing per regulation of all material removed, including but not limited to, material collected by vacuuming the deck.

Before removal of concrete, sound the bridge deck for delamination per ASTM D4580, Procedure B Chain Drag. Mark the areas of deteriorated concrete to be removed as directed by the Engineer. Removal and patching areas not designated for removal by the Engineer will not be measured or paid for.

Remove the existing concrete as shown on the plans or as directed by the Engineer.

Saw cut along the removal limits before removal. Removal operations shall not occur before approval of the Engineer. Concrete sawing shall be done to a true line, with a vertical face, unless otherwise specified. Feathered edges will not be acceptable. The depth of the saw cut shall be approximately 3/4-inch.

Revision of Section 202

Removal of Portions of Present Structure (Class 2 and 3)

The Contractor shall remove and repair only the amount of work that can be completed and reopened to traffic within the designated lane closure times as specified in the Traffic Control Plan.

The Contractor shall take all steps necessary to prevent cutting or otherwise damaging reinforcing steel, including any vertical stirrups, and structural steel including welded shear connectors projecting into the bridge deck. Repair and replace all bars or shear connectors damaged by the Contractor's operations at the Contractor's expense using means and methods approved by the Engineer with no allowance for contract time extension.

The Contractor shall take all steps necessary to prevent damage to longitudinal and transverse post-tensioning ducts and tendons. Repair damage to ducts or tendons that are shown on the as-built drawings at the Contractor’s expense with no allowance for contract time extension.

Following the removal of the concrete, straighten all exposed non-epoxy reinforcing steel to remain in place as required and thoroughly cleaned to sound metal by sandblasting per subsection 202. Do not sandblast epoxy coated reinforcing steel, if present, but clean with hand tools. Repaint epoxy coating on reinforcing steel, if damaged, with epoxy paint, before placement of the concrete.

Following sandblasting, the condition of all exposed reinforcing bars will be inspected by the Engineer. If, in the opinion of the Engineer, the loss of original cross-sectional area of the bar due to deterioration is 25 percent or more, the Contractor shall add additional bars to replace the section area loss due to deterioration, as approved by the Engineer. Lap Splice newly added bars as shown in the plans. Use a mechanical splice if the required lap splice length cannot be used. The mechanical splice shall develop at least 125 percent of the specified yield strength of the bar. Maintain all minimum clearances as defined in the plans. As an alternative, the Contractor may remove additional sound concrete to achieve the required lap length. Payment for additional removals and repairs will be based on the unit price for the appropriate class of removal and repair method.

Secure all reinforcing steel to adjacent bars or to the bridge deck as provided in subsection 602.

Thoroughly clean all areas of the prepared surface contaminated by oil or other materials detrimental to bonding by a method approved by the Engineer.

(b) Surface Preparation Equipment

Pneumatic hammers heavier than nominal 15-pound class will not be permitted.

Revision of Section 202

Removal of Portions of Present Structure (Class 2 and 3)

Pneumatic hammers and chipping tools shall not be operated at an angle exceeding 60 degrees relative to the surface of the slab. Such tools may be started in the vertical position but must be immediately tilted to a 60-degree operating angle.

Provide hand tools such as hammers and chisels for removing final particles of loose, unbonded concrete. Only short, one-handed hammers with a maximum head weight of five pounds will be allowed unless Class 3 Removal is designated. Use hydraulic demolition with the Engineer’s approval.

Sandblasting equipment shall meet the requirements of subsection 202.

(c) Class 2:

Removal of Portions of Present Structure (Class 2) shall consist of removing existing bridge deck concrete within the limits shown on the plans, or as designated by the Engineer. Class 2 removal shall begin at the surface of the existing concrete bridge deck and extend to sound concrete but shall conform to the maximum and minimum for Class 2 shown in the plans.

Wherever solid bond between existing concrete and reinforcing steel is lacking, or where more than half of the diameter of the reinforcing bars is exposed by removal of concrete, the concrete adjacent to the bar shall be removed to a minimum clearance of one inch below and around the bar in all directions to permit new concrete to bond to the entire periphery of the bar. Care shall be taken not to fracture sound concrete in the bottom half of the bridge deck.

Perform Removal by power chipping or hand tools per these specifications or as otherwise approved by the Engineer.

If loose or deteriorated concrete exists below Class 2 limits, Class 3 removal is required.

(d) Class 3:

Removal of Portions of Present Structure (Class 3) shall consist of removing existing bridge deck concrete within the limits shown on the plans, or as designated by the Engineer, following the Class 2 removal work. The concrete within the designated limits shall be removed full depth from the top of bridge deck to bottom of bridge deck.

The Contractor shall take all precautions necessary to prevent damage to diaphragms and girders below the removal limits and to minimize spalling on the bottom of the bridge deck slab adjacent to the removal boundaries.

Revision of Section 202

Removal of Portions of Present Structure (Class 2 and 3)

The Contractor shall implement a containment system that prevents debris from falling to the ground or waterways below the structure.

The Contractor is responsible for disposing of all removed material and debris.

Method of Measurement

Removal of Portions of Present Structure will be measured by the actual quantity completed and accepted to the required depth for each class. Each area of bridge deck removal will only be measured once as Class 2 or Class 3; measurement of removal areas will not overlap.

Removal and repairs beyond the minimum required lap length of reinforcing steel will not be measured or paid for, but will be at the contractor’s expense.

Cleaning of prepared surfaces contaminated by oil or other materials detrimental to bonding will not be measured and paid for separately but shall be included in the work.

Basis of Payment

Planned deck rehabilitation quantities are approximate. The actual accepted quantities of Removal of Portions of Present Structure will be paid for at the contract unit price.

Payment will be made under:

Removal of Portions of Present Structure (Class 2) Square Yard

Payment for Removal of Portions of Present Structure will be total compensation for all labor, materials, tools, equipment, and incidentals required to complete the item including but not limited to:

• Saw cutting.

• Removal of concrete to the required depth.

• Sandblasting or hand cleaning reinforcing steel including epoxy repair.

• Disposal of removed materials and debris.

Methods to prevent debris from falling from the structure, and methods to protect the traveling public using the structure, or adjacent to the structure, from airborne debris will not be paid for separately; include it in the work.

Revision of Section 202

Removal of Portions of Present Structure (Class 2 and 3)

Cleaning, straightening, and repairing epoxy coating of existing reinforcing steel will not be paid for separately; include it in the work.

Sounding and marking repair areas will not be paid for separately; include it in the work.

Payment for the new reinforcement steel will be made per Section 602. Payment for the Mechanical splice will be as the weight of reinforcing steel for the designated lap splice for that bar size.

Sandblasting Reinforcing Steel

Revise Section 202 of the Standard Specifications for this project to include the following:

Description

Sandblasting shall consist of cleaning exposed non-epoxy reinforcing steel designated to remain in place, and roughening the surface and removing all fractured particles from the entire existing concrete surface against which new concrete is to be placed.

Construction Requirements

Sandblasting equipment shall be capable of removing rust scale and concrete fragments or laitance from reinforcing steel, roughening the existing surface, and removing all fractured particles from the existing concrete surface.

After removing adjacent concrete, clean all exposed non-epoxy reinforcing steel designated to remain in place to sound steel by sandblasting. Sound steel is defined as free of oil, dirt, concrete fragments, or laitance, loose rust scale, and other coatings of any character that would limit or inhibit the bond with the new concrete. Do not sandblast epoxy-coated steel. If damaged, repaint the epoxy coating on reinforcing steel with epoxy paint before placing the concrete.

Rust that may form on the reinforcing steel within seven calendar days following the accepted sandblasting will not be cause for rejection of the steel.

When acceptable reinforcing steel is exposed to the elements for more than seven calendar days before encasement in concrete, adequate measures shall be taken by the Contractor, as approved by the Engineer, to protect the steel from contamination or corrosion. Reinforcing steel contaminated or corroded shall be re-sandblasted at the Contractor’s expense. No adjustment in Contract time will be made for re-sandblasting.

Basis of Payment

Sandblasting, including labor, materials, tools, equipment, and incidentals, will not be measured and paid for separately but shall be included in the work.

Revision of Section 203 Excavation and Embankment

Section 203 of the Standard Specifications is hereby revised for this project as follows:

Subsection 203.02 shall include the following:

Material excavated on site may be used in the areas requiring borrow, provided that the material is free of material larger than 6-inch diameter, has a good mix of fines, sand, and gravels and if it meets the required specifications. Material excavated will be evaluated on a case-by-case basis by the Engineer for suitability for reuse in the embankment.

Subsection 203.03, third paragraph shall be replaced with the following:

The borrow source of embankment material is not designated. The material shall be furnished to the site and compacted in place as per CDOT specifications and proof rolled with a fully loaded 4000-gallon tandem axle water truck or equivalent to determine adequate compaction, as determined by the Engineer. Any benching, over excavation, construction of temporary pads, removal of large boulders, shoring, or other work necessary to place the borrow to the lines and grades is considered incidental to the work. The material shall be a well-blended mixture of fines, sand, gravels, and cobbles not to exceed 6-inches in diameter. The material and borrow source must be visually inspected by the Engineer prior to construction. Approval of the source will be contingent upon the material meeting the following requirements

a) A maximum dry density of not less than 100 pounds per cubic foot and a modulus resistance value of at least 40 (for the Hveem method).

b) A well-mixed blend of fines, sand, gravel, and cobbles free of organic and deleterious material, not to exceed 6-inches in diameter and with a No. 200 range of 12 to 28 percent. An overburden cover material containing material passing the No. 200 may be required to be mixed with an overly pervious borrow to produce a borrow material which compacts well, is resistant to erosion, and allows for smooth, cobble-free slopes and allows for complete re-vegetation on the final embankment slopes.

The Contractor shall furnish certification from a material testing laboratory that the borrow material to be furnished meets the above requirements, including gradation tests.

No aggregate base course materials shall be placed in any section until the cut or fill slopes of that section of embankment and the ditch cut areas have been completely compacted to the top of subgrade and to the full width of the finish subgrade, with no cobbles or rock or debris visible on the slopes.

Revisio…