14-TR2101_25517_Project Special Provisions (PSP)_FINAL (2024.10.14).pdf

City of Lafayette 120th Over Coal Creek 3/17/2025

Lafayette, Colorado

Department of Public Works

120th Over Coal Creek Bridge Rehabilitation

CDOT Project Number: BRO M750-007

CDOT Subaccount Number: 25517

The Colorado Department of Transportation 2023 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.

In addition to requirements of the Colorado Department of Transportation Standard Specifications for Road and

Bridge Construction, and the Contract Documents, all material and work shall conform to the requirements of the National Electrical Line Construction of the Public Utilities Commission, the Standards of the American

Society for Testing and Materials (ASTM), the American Standards Association (ASA), and any local ordinance which may apply.

Reference to any portion of the Lafayette Standard Details contained herein shall imply precedence over the

CDOT Standard Specifications and Plans and shall be the requirement.

PROJECT SPECIAL PROVISIONS

Date Page

Index March 17, 2025 1-3

Notice to Bidders March 17, 2025 4

Disadvantaged Business Enterprise (DBE) Contract Goal March 17, 2025 5

Commencement and Completion of Work (Working Days) March 17, 2025 6

On the Job Training Contract Goal March 17, 2025 7

-2-

PROJECT SPECIAL PROVISIONS

Revision of Section 104 – Scope of Work

Date

March 17, 2025

Page

Revision of Sections 104 and 105 – Pavement Surface Course Maintenance March 17, 2025 9

Revision of Section 105 – Control of Work March 17, 2025 10-11

Revision of Section 107 – Legal Relations and Responsibility to Public March 17, 2025 12-14

Revision of Section 201 – Clearing and Grubbing March 17, 2025 15

Revision of Section 202 – Removals March 17, 2025 16

Revision of Section 202 – Removal of Bridge Railing March 17, 2025 17

Revision of Section 202 – Removal of Portions of Present Structure March 17, 2025 18

Addition of Section 211 – Dewatering March 17, 2025 19

Revision of Section 217 – Herbicide Treatment March 17, 2025 20-22

Revision of Section 240 – Special Protection of Migratory Birds March 17, 2025 23-24

Revision of Section 304 – Aggregate Base Course March 17, 2025 25

Revision of Section 403 – Hot Mix Asphalt March 17, 2025 26-28

Revision of Section 509 – Provide Temporary Support March 17, 2025 29

Revision of Section 603 – Reinforced Concrete Pipe March 17, 2025 30

Revision of Section 606 – Bridge Rail March 17, 2025 31

Revision of Section 614 – Impact Attenuator March 17, 2025 32

Revision of Section 627 – Pavement Marking March 17, 2025 33

Revision of Section 630 – Construction Zone Traffic Control March 17, 2025 34-36

Traffic Control Plan – General March 17, 2025 37-39

Force Account Items March 17, 2025 40

Utilities March 17, 2025 41-44

-3-

COLORADO DEPARTMENT OF TRANSPORTATION

SPECIAL PROVISIONS

STANDARD SPECIAL PROVISIONS

Name Date No. of

Pages

Revision of Section 101 – Definitions and Section 106 - Control of Materials (Jan 8, 2024) 2

Revision of Sections 101 and 106 – Buy America and Build America, Buy America Requirements for Projects Containing $500,000 or more in Federal-Aid Highway Funding

(Jan 8, 2024) 9

Revision of Section 105 – Asphalt Mat Density (Dec 26, 2024) 1

Revision of Section 105 – Control of Work (Oct 1, 2023) 1

Revision of Section 105 – Dispute Review Board and Claims for Unresolved

Disputes

(Oct 1, 2023) 8

Revision of Section 105 – E-Signature (Jan 8, 2024) 1

Revision of Section 106 – Conformity to the Contract of Hot Mix Asphalt

(Less than 5000 Tons)

(Oct 1, 2023) 3

Revision of Section 106 – Control of Material (Sept 30, 2024) 1

Revision of Section 107 – Water Quality Control (Under One Acre of (Oct 1, 2023) 8

Disturbance)

Revision of Section 208 – Erosion Control (Under one acre of disturbance) (Oct 1, 2023) 36

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

(Jan 8, 2024) 4

Revision of Section 401 – Plant Mix Pavements – General (Subsection 401.10)

(Sept 30, 2024) 1

Revision of Section 601 – Concrete Acceptance (Apr 9, 2024) 4

Revision of Section 630 – MHT Signature Requirements (Dec 26, 2024) 1

Affirmative Action Requirements Equal Employment Opportunity (Oct 1, 2023) 13

Certified Payroll Requirements for Construction Contracts (Oct 1, 2023) 1

Disadvantaged Business Enterprise (DBE) Requirements (Oct 1, 2023) 15

Minimum Wages, Colorado, U. S. Department of Labor General Decision (Jan 3, 2025) 4

Number CO20250007, Highway Construction for Boulder County

On the Job Training (Oct 1, 2023) 6

Required Contract Provisions – Federal-Aid Construction Contracts (Oct 23, 2023) 15

Special Construction Requirements, Fire Protection Plan (Oct 1, 2023) 2

-1-

NOTICE TO BIDDERS

The proposal guaranty shall be a certified check, cashier's check, or bid bond in the amount of 5 percent of the Contractor's total bid.

Pursuant to subsections 102.04 and 102.05, it is recommended that bidders on this project review the work site and plan details on their own. Prospective bidders may attend the pre-bid conference, but it is not mandatory.

There will be no individual showing of the project with the authorized City of Lafayette representative.

Principal Transportation Engineer - Leslie Ewy, PE

Cell Phone: 303-661-1280

Project Manager/Engineer - Casey Carlson, PE Cell Phone: 720-438-0571

The above referenced individuals are the only representatives with authority to provide any information, clarification, or interpretation regarding the plans, specifications, and any other contract documents or requirements.

All questions shall be directed to the City of Lafayette contacts listed above no later than the date and time listed in the Request for Bids.

DISADVANTAGED BUSINESS ENTERPRISE (DBE) CONTRACT GOAL

This is a federally-assisted construction project. As described in the CDOT DBE Standard Special Provision, the Bidder shall make good faith efforts to meet the following contract goal:

0% Percent DBE participation.

COMMENCEMENT AND COMPLETION OF WORK

(WORKING DAYS)

The Contractor shall select the date that the contract time begins for this project, subject to the following conditions:

a) The Contractor shall commence the work within 10 days of the date of the Notice to Proceed.

b) The Contractor shall notify the City Project Manager in writing, at least five (5) business days before the proposed beginning date.

c) The date that contract time begins shall be subject to the City’s approval. A different date may be authorized in writing by the City in the “Notice to Proceed.”

d) Substantial Completion of the project shall be accomplished within 60 working days after NTP.

Final completion of the work shall be accomplished within 30 days of the date of Substantial Completion.

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

Subsection 108.05 shall include the following:

The full closure of 120th Street shall be conducted within 45 Calendar Days. Traffic may run directly on the concrete deck with temporary asphalt at abutments and tapers, until temperatures are achieved to place final

HMA.

The Contractor’s progress schedule shall be a Critical Path Method schedule.

The Contractor shall present an initial schedule to the Engineer at or prior to the preconstruction conference.

This initial schedule shall show the major features of the project for the entire project time frame.

Salient features for this project are:

1. Mobilization

2. Permits

3. Stormwater Management

4. Traffic Control: Traffic Control Plan and Detour Plan Submittal/Approval/Installation/Maintenance

5. Clearing and Grubbing

6. Temporary Structural Supports

7. Removals

8. Deck Forms, Reinforcing Steel, and Embedded Bolts

9. Deck Dry Run

10. Pour Concrete Slab and Necessary Cure Time

11. ADA Curb Ramps

12. 18 Inch RCP

13. Bridge Railings, Transitions, and Guardrail

14. Waterproofing Membrane

15. Hot Mix Asphalt

16. Ground Signs and Pavement Markings

17. Substantial Completion – Complete Full Closure and Open 120th Street

18. Re-vegetation and Final Stabilization

19. Final Inspection and Punch List Repairs

20. Clean-up and De-Mobilization

END OF SECTION

ON THE JOB TRAINING

CONTRACT GOAL

The Department has determined that On the Job Training shall be provided to trainees with the goal of developing full journey workers in the types of trade or classification involved. The contract goal for On the Job Trainees working in an approved training plan in this Contract has been established as follows:

Minimum number of total On the Job Training required is 0 hours.

REVISION OF SECTION 104

SCOPE OF WORK

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

Subsection 104.04 shall include the following:

If the Engineer determines that construction signs, channelizing devices or materials being used are damaged, worn, faded, or are incapable of conveying the intended message or serving the intended purpose, the Contractor shall replace or repair such signs, devices or materials as directed by the Engineer. The cost of any repair or replacement shall be included in the work and no additional compensation shall be made.

The Contractor is cautioned that parking of all vehicles and construction equipment is prohibited when it or its location conflicts with driveway access or the flow of traffic (including pedestrians). Parking of non-operating construction equipment will not be allowed within the limits of the creek channel.

The Contractor shall be responsible for furnishing and maintaining all traffic control devices in accordance with the Manual on Uniform Traffic Control Devices (MUTCD). The Contractor shall be responsible for providing and maintaining all temporary pavement markings in accordance with MUTCD, until the final striping is completed, and the Project is accepted by the City.

The Contractor shall inspect, maintain and keep all traffic control devices clean throughout the Project duration, including during periods when other work required for the Project has been suspended due to inclement weather, unless approved otherwise in writing by the Engineer.

Throughout the duration of the construction the Contractor shall:

• Take all necessary measures to maintain a normal flow of vehicular and pedestrian traffic to prevent accidents and to protect the work throughout the entire project. The Contractor shall make the necessary arrangements to reroute traffic, provide and maintain barriers, cones, guards, barricades, and construction warning and regulatory signs. It shall be the Contractor’s responsibility to maintain roadway traffic safety, adequately, and continuously on all portions of existing roads, driveways, cross roads, and pedestrian detours affected by this work.

END OF SECTION REVISION

REVISION OF SECTIONS 104 AND 105

PAVEMENT SURFACE COURSE MAINTENANCE

Sections 104 and 105 of the Standard Specifications are hereby revised for this project as follows:

In subsection 104.04, third paragraph, delete the first sentence and replace with the following:

The Contractor shall not track mud onto City roads or trails; if mud is tracked onto City roads or trails, the mud shall be immediately removed by the Contractor. The Contractor is not responsible for maintaining portions of City roads or trails, except for:

(1) Damage to City road or trail pavement surface course if the damage results from Contractor’s construction equipment; and

(2) Mud removal resulting from Contractor’s equipment.

REVISION OF SECTION 105

CONTROL OF WORK

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

Subsection 105.2(b) shall include the following:

After contract award, prior to ordering, and/or at the Engineer’s request, the Contractor shall submit shop drawings and specifications for equipment and materials the Contractor proposes to furnish. The shop drawings and specifications shall be complete as to name of manufacturer, size, and catalog number of unit, and shall be supplemented by such other data as may be required. The Engineer’s approval shall be required prior to ordering.

Subsection 105.03 shall include the following:

Inspection or sampling of any materials, other than those materials already approved by the Engineer, must be made by the Engineer prior to installation. If the Contractor proposes a substitution of material called for in the plans as specifically defined in these specifications, or as shown in approved submittals and shop drawings, the Contractor shall provide additional information to prove the substitution item is of equal or superior quality. Any material and/or equipment installed by the Contractor that is not in conformance with the project specifications shall be removed or changed at the Contractor's expense.

Subsection 105.09 shall be deleted and replaced with the following:

Any work shown on the plans and not covered in the special provisions or included in the special provisions and not shown on the plans, shall be executed by the Contractor as though shown both on the plans and included in the special provisions. The plans, Project Special Provisions, Standard Special Provisions, Standard Specifications, Standard Plans, and all supplementary documents are intended to be complete and complementary. If any omissions are made which are necessary to carry out the full intent and meaning of the Contract, the Contractor shall identify such omissions to the City. All work to be performed under this Contract shall be governed by said plans and special provisions, including all Addenda thereto, unless modified by any technical specifications, which are included in the Contract Documents.

In case of discrepancy, the order of precedence is as follows:

1. Change Orders

2. Addenda

3. Notice to Bidders

4. Project Special Provisions

5. Plans

6. Standard Special Provisions

7. CDOT Standard Specifications for Road and Bridge Construction, Dated 2023

8. CDOT Standard Plans – M&S Standards, Dated 2019 and most recent revisions.

9. CDOT Construction Manual

10. CDOT Field Materials Manual SSP-11

Calculated and specified dimensions will govern over scaled dimensions.

-2-

REVISION OF SECTION 105

CONTROL OF WORK

Subsection 105.10 shall include the following:

At least one set of the Contract Documents shall be available at the Project site at all times. Plans in electronic file pdf format will also be provided.

It shall be the responsibility of the Contractor to make timely requests of the City for any additional information (RFI) not already in his possession which the Contractor believes should be furnished by the City under the terms of this Contract, and which will be required in the planning and execution of the work. Such requests shall be submitted in writing as the need is identified, but each request shall be filed in ample time to permit appropriate action to be taken by all parties involved, so as to avoid delay. The Contractor shall, if requested, promptly furnish any assistance and information the City may require to respond to these requests by the Contractor. The Contractor shall be fully responsible for any delay in his work or delay to others arising from his failure to comply fully with the provision(s) of this paragraph.

Subsection 105.12 shall include the following:

The Contractor shall schedule and coordinate all traffic lane closures, detours, and methods of handling traffic (MHT) at least five days prior to the lane closure or MHT taking effect. All other phasing sequencing shall be submitted to the City for approval prior to its implementation.

Contractors’ representatives shall meet with City staff and other entities as often as necessary to maintain coordination of construction activities.

The cost of the coordination and communication equipment shall be included in the work with no separate payment.

In subsection 105.22, the first paragraph is deleted and replaced with the following:

Subsections 105.22, 105.23 and 105.24, as revised, detail the process through which the parties (the City and the Contractor) agree to resolve any issues that may result in a dispute. The intent of the process is to resolve issues early, efficiently and as close to the project level as possible. Specified time frames may be extended by mutual agreement of the City and the Contractor, as agreed to and stipulated in writing.

In subsection 105.22(d), the first paragraph is deleted and replaced with the following:

(d) Authorized City Representative Review. Within seven calendar days after receipt of the Contractor’s written notice to the Authorized City Representative of unsatisfactory resolution of the dispute, the City representative and Authorized City Representative will meet with the Contractor to discuss the dispute. Meetings shall continue weekly for a period of up to 30 days and shall include a Contractor’s representative with decision authority above the project level.

In Subsection 105.24, references to CDOT representatives are replaced to mean authorized City representatives.

REVISION OF SECTION 107

LEGAL RELATIONS AND RESPONSIBILITY TO PUBLIC

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

The Contractor shall be responsible to obtain right to access permits from the property owners for work outside the public right-of-way if a temporary construction easement has not been recorded.

All permits and licenses necessary for the performance of the work shall be secured by the Contractor. The Contractor shall be responsible for obtaining all necessary permits prior to beginning construction for work.

The cost associated with all permits (including providing additional insurance requirements) shall be considered part of the work and no additional compensation shall be made.

Subsection 107.12 shall include the following:

The Contractor shall assume full responsibility and expense for the protection of all public and private property, structures, ground signs, utilities, etc., both above and below ground, at or near the site or sites of the work being performed under the Contract, or which are in any manner affected by the prosecution of the work or the transportation of personnel and materials in connection therewith.

The Contractor shall clearly mark and protect the vegetation areas and all construction/demolition limits in the field prior to the commencement of construction operations. All construction operations must be performed in such a manner which will avoid protected trees and landscape areas.

The Contractor shall promptly report any vegetation damaged or scarred during construction to the City for review and to determine course of action. Vegetation of replaceable size shall be replaced at the Contractor's expense. The determination as to whether a plant is of replacement size or beyond will be made by the City Inspector.

The Contractor shall perform all the work in such a manner that the least environmental damage will result.

All questionable areas or items of work shall be brought to the attention of the City for approval prior to removal or any damaging activity. No chemicals shall be applied or used around or near existing vegetation.

If a fence is knocked down or destroyed by the Contractor, the City will suspend the work, wholly or in part, until the fence is repaired to the City’s satisfaction at the Contractor’s expense. Time lost due to such suspension will not be considered a basis for adjustment of time charges, but will be charged as contract time.

Subsection 107.15 shall include the following:

The Contractor shall exercise proper precaution at all times for the protection of persons and property and shall be responsible for all damage to persons or property, either on or off the site, which occur as a result of his prosecution of the work.

The safety provisions of applicable laws and building and construction codes shall be observed, and the Contractor shall take or cause to be taken such additional safety and health measures as deemed necessary.

The Contractor shall maintain an accurate record of all cases of death, occupational disease, and injury requiring medical attention or causing loss of time from work arising out of, and in the course of, employment on the work under this Contract. The Contractor shall promptly furnish the City representative with reports concerning these matters.

LEGAL RELATIONS AND RESPONSIBILITY TO PUBLIC

The Contractor expressly binds himself to indemnify and save harmless the City of Lafayette against all suits, actions, claims, costs, expenses, and attorneys' fees of any kind and nature brought, or which may be brought against the City for or on account of any injuries or damage received or sustained by any person, firm, partnership or corporation, or persons, firms, partnerships or corporations, in connection with or on account of the performance of the work under this Contract or by or in consequence of any negligence in connection with the same, or on account of the use of any improper or defective materials or workmanship, or on account of any act or omission or commissions of the Contractor, or a subcontractor, agents, servants or employees, or for any cause arising out of the performance of the subcontractor, agents, servants or employees relating to this Contract. The City may, if it so desires, withhold any payment due the Contractor so long as it shall be reasonably necessary to indemnify the City on account of such injuries or damage.

Subsection 107.15(e) shall include the following:

(e) The certificates of insurance shall be provided to the City by the Contractor's insurance agent or carrier as evidence that policies providing the required coverage, conditions, and minimum limits are in full force and effect. Insurance limits must be on each Certificate of Insurance. Each Certificate of Insurance shall be reviewed and approved by the City prior to commencement of the Contract. No other form of certificate shall be used. The certificates shall identify this Contract.

For this project all insurance certificates shall name: the City of Lafayette and their employees, officers, and subcontractors as additional insured.

In the event of a conflict between the requirements of this section and the requirements of the Contract, the more restrictive, or the more stringent requirement, to the benefit of the City shall apply.

Subsection 107.15(g) shall include the following:

(g) Failure on the part of the Contractor to procure or maintain policies providing the required coverage, conditions and minimum limits shall constitute a material breach of contract upon which the City may immediately terminate this Contract, or at its discretion the City may procure or renew any such policy or any extended reporting period thereto and may pay any and all premiums in connection therewith, and all monies so paid by the City shall be repaid by Contractor to the City upon demand, or the City may offset the cost of the premiums against any monies due to the Contractor from the City.

Subsection 107.17 shall include the following:

The Contractor shall be responsible for the Project and shall take such precautions as may be necessary to construct the Project in a stable condition, provide for drainage, groundwater, underground water, surface runoff; and shall erect any necessary temporary structures or other facilities (including pumping and all other dewatering costs), as part of the construction work, that are needed to complete the requirements for this Project (until the Project is completed and accepted by the City). This work shall be a subsidiary obligation of the Contractor for this Project.

In an emergency affecting the safety of life or property, on or adjoining the site, the Contractor shall act, either at his own discretion, or as instructed by the City representative, to prevent such threatened loss or injury. Any compensation claimed by the Contractor on account of such emergency work will be determined by the City as provided in subsections 104.03 and 109.04.

LEGAL RELATIONS AND RESPONSIBILITY TO PUBLIC

Subsection 107.19 shall include the following:

The Contractor shall construct this Project within the right-of-way shown on the plans. The Contractor, at his expense, may obtain any additional temporary construction easements that the Contractor wants. The Contractor shall provide the City with a written copy of all third party agreements pertaining to this contract.

Upon written approval by the City representative, the City may agree to incorporate the additional temporary construction easements into the Project limits. The Contractor will be responsible for obtaining all applicable Federal, State and Local permits associated with the work outside the Project limits. No time extensions will be granted by the City for the Contractor to obtain these additional easements. When required, temporary fence will be constructed within the limits of the temporary construction easements.

In subsection 107.25 (b) (16), delete the first sentence and replace with the following:

Fuels, lubricants, and other petroleum distillates shall not be stored adjacent to concentrated flow areas or bodies of water and shall be protected with appropriate BMPs.

Subsection 107.25 (b) 20 shall include as the following:

Sludge from potholing and saw cutting shall be vacuumed and properly disposed of in appropriate containers.

REVISION OF SECTION 201

CLEARING AND GRUBBING

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

DESCRIPTION

Subsection 201.01 shall include the following:

The work shall consist of clearing, grubbing, and removing all items identified in Section of 201.01 of the CDOT’s Standard Specifications for Road and Bridge Construction within the limits of the existing right of way, or as directed by the City.

Clearing and grubbing shall also include removal of rocks and all shrubs within the limits of disturbance. This work includes the preservation from injury or defacement of all vegetation and objects designated to remain.

CONSTRUCTION REQUIREMENTS

Subsection 201.02 shall include the following:

All bushes, shrubs, plants, grasses, and other vegetative materials within the work area shall be removed unless otherwise noted in the plans. Trees shall be removed, or protected, as indicated in the plans.

Any damage to existing private and public improvements caused by the removal of trees shall be repaired at the Contractor’s expense. Strict limits of disturbance will be defined and shall be adhered to. Any damage caused by the contractor while removing trees shall be repaired immediately at the Contractor’s expense.

All brush, branches, limbs, and foliage shall be removed from the project and shall become the property of the contractor.

METHOD OF MEASUREMENT

Subsection 201.03 shall be revised to include the following:

The work of clearing and grubbing will be paid for on lump sum basis within the limits shown on the approved plans by the City. Removal of shrubs, plants, grasses, and other vegetative materials within the roadway prism shall be measured and paid for as clearing and grubbing.

REVISION OF SECTION 202

REMOVALS

Section 202 of the Standard Specifications is hereby revised for this project as follows:

CONSTRUCTION REQUIREMENTS

Subsection 202.02 shall include the following:

Removal of guardrail shall include removal of rail, posts, end sections, foundations, and anchor blocks.

Disposal of material is included in the cost of this work.

In subsection 202.02 delete the seventh paragraph and replace with the following:

The existing asphalt mat, which varies in thickness, shall be completely removed in a manner that minimizes contamination of the removed mat with underlying material. The removed mat shall become the property of the Contractor and be disposed of off-site.

Subsection 202.11 shall include the following:

Removals will be measured per the units described in the plans. Equipment, disposal of material, or ancillary work will not be measured.

The removal of the existing asphalt mat will be measured by the area, in square yards, completed to the required depth and accepted.

Sawing asphalt pavements for removal shall not be measured and paid for separately but shall be included in the unit price for the associated bid item.

REMOVAL OF BRIDGE RAILING

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

DESCRIPTION

This work consists of removing the steel portion of bridge railing per these specifications and conforming with the lines and details shown on the plans or as approved by the Engineer.

CONSTRUCTION REQUIREMENTS

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

Remove the bridge railing as shown in the plans.

The Contractor shall take all steps necessary to protect the existing structure. Repair in kind any damage caused by the Contractor to any portion of the structure not intended for repair shall at the Contractor’s expense using means and methods approved by the Engineer with no allowance for contract time extension.

The Contractor is responsible for disposing of all removed material and debris. If the existing structural steel contains lead-based paint, disposal shall conform to Section 250. The existing structure was constructed in 1977, which is before the 1978 threshold year when lead-based paint ended.

METHOD OF MEASUREMENT

Removal of Bridge Railing will be measured by the actual quantity completed and accepted, by linear foot.

BASIS OF PAYMENT

The accepted quantities of Removal of Bridge Railing will be paid for at the contract unit price.

Payment will be made under:

Pay Item Pay Unit

Removal of Bridge Railing Linear Foot

Payment for Removal of Bridge Railing will be total compensation for all labor, materials, tools, equipment, and incidentals required to complete the work, and disposing of all items.

REMOVAL OF PORTIONS OF PRESENT STRUCTURE

Section 202 of the Standard Specifications is hereby revised for this project as follows:

DESCRIPTION

Subsection 202.01 is revised to include the following:

This work consists of the removal and disposal of the existing structure reinforced concrete top slab and portion of existing reinforced concrete southwest and northwest wingwalls. Existing structure reinforced concrete bottom slab, exterior walls, and interior walls are to remain and protected in place. Existing reinforcing steel projecting from existing reinforced concrete walls are to be protected. Removal limits shall be as shown in the plans

CONSTRUCTION REQUIRMENTS

Subsection 202.08 is revised to include the following:

Removal of existing reinforced concrete top slab and portions of existing wingwalls shall conform to the details in the plans.

Removal methods shall not damage the portions of structure to remain. Excessive deformations, chipping, cracking, spalling, or full-depth holes are considered damage.

All material falling from or intentionally removed from the structure repair work areas shall be removed from the site and shall be disposed of in accordance with Specification Section 250. Concrete, or any other material that falls from or is intentionally removed during bridge repairs shall be contained from falling into Coal Creek, and disposed on in accordance with Specification Section 250. Coal Creek is defined as the entire width between abutments, including riprap and water.

At least 2 days before start of removal work, the Contractor shall submit to the Engineer description of the removal operations, showing the methods and sequence of removal and equipment to be used.

MEASUREMENT

Subsection 202.11 is revised to include the following:

Removal of Portions of Present Structure will not be measured, but will be paid for on a lump sum basis.

Removal includes disposal of material off-site.

BASIS OF PAYMENT

Subsection 202.12 is revised to include the following:

Payment will be made under:

Pay Item Pay Unit

Removal of Portions of Present Structure Lump Sum

Payment will be full compensation for all work necessary to complete the item, including disposal of material removed.

ADDITION OF SECTION 211

DEWATERING

Section 211 is hereby added to the Standard Specifications for this project as follows:

DESCRIPTION

211.01 This work consists of dewatering temporary excavations and temporary diverting Coal Creek to facilitate construction activities, and in accordance with Colorado Department of Health and Environmental dewatering regulations to facilitate construction activities.

MATERIALS

211.02 The Contractor shall provide all required materials and equipment to facilitate dewatering.

The Contractor may temporarily divert Coal Creek away from the rehabilitation construction. Geotextile membrane shall be placed in the stream to provide a barrier between the stream bed and any material placed in the stream to construct working platforms, diversion berms, etc.

CONSTRUCTION REQUIREMENTS

211.03 The Contractor shall dewater, by pumping, by excavating trenches leading to a positive gravity outlet, creating diversion berms, or utilizing conveyance pipes.

Pumping equipment, if used, shall not exceed 75 decibels between 11pm and 6am.

Temporary berms or cofferdams, if used, shall be sized by the Contractor to shift the creek from the construction area, with the anticipation that flows expected during construction are anticipated to occur during the construction season. Any temporary berms or coffer dams installed in the creek below the ordinary high water mark shall impact less that 0.03 acres. If more than 0.03 acres will be impacted, the contractor shall obtain a 404 permit through the US Army Corp of Engineers.

The Contractor’s method of dewatering and water disposal, including pumping and discharge equipment, must be approved by the Engineer prior to implementation. The Contractor shall submit a dewatering plan for review and approval 30 calendar days prior to implementation in accordance with Subsection 105.02. Water disposal shall be in accordance with Subsection 107.25 – “Water Quality Control”. The Contractor shall obtain all necessary permits and submit copies to the Engineer prior to commencing any dewatering activities.

211.04 Dewatering work will not be measured for payment but shall be on a lump sum basis.

BASIS OF PAYMENT

211.05 Dewatering shall be paid at the contract unit price for each pay item listed below. All materials, equipment, and labor required to dewater all excavations during the course of the project will be included in the pay items listed below:

Payment will be made under:

Pay Item Pay Unit

Dewatering Lump Sum (LS)

REVISION OF SECTION 217

HERBICIDE TREATMENT

Section 217 of the Standard Specifications is hereby revised for the project as follows:

DESCRIPTION

Delete Subsection 217.01 and replace with the following:

All areas to be disturbed within the project area, regardless of final disposition, shall be treated with herbicide before disturbance. After seeding and near the end of the project, if noxious weed species persist, seeded areas shall receive an additional application of herbicide. All applications shall target noxious weeds designated by the Colorado Department of Agriculture including List A, B, and C species. Recommended treatments for noxious weeds identified in the project area are summarized in the following table. Additional recommended treatments for noxious weeds including those not listed in the table below, can be found on the Colorado Department of Agriculture’s website at https://www.colorado.gov/pacific/agconservation/noxious-weed-species

Noxious Weed

Plant Growth

Characteristics

State

List1

Recommended Treatments

Canada thistle (Cirsium arvense)

Aggressive rhizomatous perennial of moist/wet sites;

seeds and plant parts easily transported by construction equipment. Emerge late April through May and flower in late spring to early summer.

B

Mechanical Control: Due to the species’ extensive root system, hand-pulling and tilling stimulate the growth of new plants and are not recommended.

Mowing every 10 to 21 days during the growing season can be effective.

Herbicide Control: Aminopyralid (Milestone), Clopyralid + Triclopyr, Amiocyclopyracholor + chlorosulfur, or Picloram applied in spring before flowering and/or during fall regrowth.

Cultural Control: Reseed with native seed mix and prevent bare ground.

Cheatgrass/ Downy Brome

(Bromus tectorum)

Prolific seed producing winter annual; becomes a fire hazard upon maturity. Seeds easily transported by construction equipment.

C

Mechanical Control: Mowing and chopping is not recommended.

Herbicide Control: Fall application of Plateau, prior to hard freeze is optimum. Can also make application during early spring growth. Or, apply Panoramic 2 SL pre-or post emergent in later summer or early fall.

Cultural Control: Reseed with native seed mix.

Check seed mix for cheatgrass contaminant.

*Continued on next page

Noxious Weed

Plant Growth

Characteristics

State

List1

Recommended Treatments

Common teasel (Dipascus fullonum)

Biennial and sometimes monocarpic perennial forb that produces seed once before dying.

B

Mechanical Control: Sever the root below the soil surface during the first year before the plant stores energy and in the second year before seed production. Require consecutive years of season-long treatment. Flower heads must be collected, bagged, and disposed of Herbicide Control:

Aminocyclopyrachlor + chlorsulfuron: seedling to bolting stage Aminopyralid: Spring at rosette to early bolt stage and/or in fall to rosettes. Best choice for riparian areas.

Metsulfuron methyl: apply to spring or fall rosettes or early summer bolting.

Imazapic: Apply to spring or fall rosettes or early summer bolting.

Cultural Control: Reseed with native seed mix and prevent bare ground.

1List A Species in Colorado that are designated by the Commissioner for eradication.

List B Species are species for which the Commissioner, in consultation with the state noxious weed advisory committee, local governments, and other interested parties, develops and implements state noxious weed management plans designed to stop the continued spread of these species.

List C Species are species for which the Commissioner, in consultation with the state noxious weed advisory committee, local governments, and other interested parties, will develop and implement state noxious weed management plans designed to support the efforts of local governing bodies to facilitate more effective integrated weed management on private and public lands.

Dicamba may injure woody plants.

Glyphosate may be used in riparian areas

2,4-D and Transline should not be used in riparian areas or near water.

Picloram is persistent in the soil and should not be used in areas to be re-seeded.

CONSTRUCTION REQUIREMENTS

Section 217.03 shall include the following:

The Contractor shall comply with the following best management practices in all construction areas to prevent the spread of noxious weeds and minimize potential effects from treatment:

• Minimization of soil disturbance to the greatest extent possible

• Clean all construction-related equipment thoroughly before off-loading at the project site and after working with weed-contaminated soils

• Coordination of weed management efforts with adjacent landowners to the extent possible

• Avoidance of non-target injury to passing pedestrians and motorists, adjacent native plant communities, landscaping, sensitive wildlife habitat (prairie dogs), and nearby beekeeping operations (if present)

• Herbicides can be used immediately adjacent to wetlands, riparian areas, and/or water bodies only if the label indicates its use is appropriate for such areas

• Application of herbicides immediately adjacent to active prairie dog colonies will not be permitted

• Noxious weeds observed in and near the construction area will be treated with herbicides or mechanically removed prior to the start of construction to minimize spread

• Monitor all areas treated for noxious weeds during construction and re-treat, if necessary, to prevent re-establishment of noxious weeds

Delete the last paragraph in Subsection 217.03, “Herbicides shall not be…”

Delete Subsection 217.04 and replace with the following:

Herbicide Treatment shall be measured by the number of person-hours required to apply herbicide, as approved by the Engineer.

Mechanical control shall be included in the cost of Clearing and Grubbing.

Seeding shall be included in the cost of 212 Seeding (Native).

Section 217.05 shall include the following:

Payment shall be made under:

Herbicide Treatment Hour

REVISED SECTION 240

PROTECTION OF MIGRATORY BIRDS

BIOLOGICAL WORK PERFORMED BY THE CONTRACTOR’S BIOLOGIST

Section 240 is hereby added to the Standard Specifications for this project as follows:

DESCRIPTION

240.01 This work consists of protecting migratory birds during construction work on structures.

MATERIALS AND CONSTRUCTION REQUIREMENTS

240.02 The Contractor shall schedule construction activity, including clearing and grubbing operations and work on structures, to avoid taking (pursue, hunt, take, capture, or kill; attempt to take, capture, kill or possess) migratory birds or their nests protected by the Migratory Bird Treaty Act (MBTA). If construction activity is to occur between April 1 and August 31, then the following specifications must be followed and the Contractor shall retain a qualified wildlife biologist to determine where nest removal may occur or will be required during construction. The wildlife biologist shall have a minimum of three years’ experience conducting migratory bird surveys and implementing the requirements of the MBTA. The Contractor shall submit documentation of the biologists’ education and experience to the Engineer for acceptance. A biologist with less experience may be used by the Contractor subject to the approval of the Engineer based on review of the biologist’s qualifications. If all construction activities occur after August 31 and before April 1, then the requirements set forth in this specification are not required.

The wildlife biologist shall record the location of each protected nest, bird species, the protection method used, and the date installed. A copy of these records will be submitted to the Engineer.

(A) Vegetation Removal. When possible, vegetation shall be cleared prior to the time when active nests are present. Vegetation removal activities shall be timed to avoid the migratory bird breeding season which begins on April 1 and runs to August 31. All areas scheduled for clearing and grubbing between April 1 and August 31 shall first be surveyed by the wildlife biologist within 50 feet of the work limits for active migratory bird nests. Contractor personnel shall enter areas only if a written, signed document granting permission to enter the property has been obtained from the property owner. The Contractor shall document all denials of permission to enter property. The Contractor shall avoid all migratory bird nests. The Contractor shall avoid the area within 50 feet of the active nests or the area within the distance recommended by the biologist until all nests within that area have become inactive. Inactive nest removal and other necessary measures shall be incorporated into the work as follows.

1. Tree and Shrub Removal or Trimming. Tree and shrub removal or trimming shall occur before April 1 or after August 31 if possible. If tree and shrub removal or trimming will occur between April 1 and August 31, a survey for active nests shall be conducted by the wildlife biologist within the seven days immediately prior to the beginning of work in each area of tree and shrub removal or trimming. The survey shall be conducted for each phase of any tree or shrub removal or trimming.

If an active nest containing eggs or young birds is found, the tree or shrub containing the active nest shall remain undisturbed and protected until the nest becomes inactive. The nest shall be protected by placing fence (plastic) a minimum distance of 50 feet from each nest to be undisturbed. This buffer dimension may be changed if determined appropriate by the wildlife biologist and approved by the Engineer. Work shall not proceed within the fenced buffer area until the young have fledged or the nests have become inactive. If the fence is knocked down or destroyed by the Contractor, the Engineer will suspend the work, wholly or in part, until the fence is satisfactorily repaired at the Contractor’s expense. Time lost due to such suspension will not be considered a basis for adjustment of time charges, but will be charged as contract time.

2. Grasses and Other Vegetation Management. Due to the potential for encountering ground nesting birds’ habitat, if work occurs between April 1 and August 31, the area shall be surveyed by a wildlife biologist within the seven days immediately prior to ground disturbing activities.

The undisturbed ground cover to 50 feet beyond the planned disturbance, or to the right-of-way line, whichever is less, shall be maintained at a height of 6 inches or less beginning April 1 and continuing until August 31 or until the end of ground disturbance work, whichever comes first.

REVISED SECTION 240

PROTECTION OF MIGRATORY BIRDS

BIOLOGICAL WORK PERFORMED BY THE CONTRACTOR’S BIOLOGIST

If birds establish a nest within the survey area, an appropriate buffer of 50 feet will be established around the nest by the wildlife biologist. This buffer dimension may be changed if determined appropriate by the wildlife biologist and approved by the Engineer. The Contractor shall install fence (plastic) at the perimeter of the buffer. Work shall not proceed within the buffer until the young have fledged or the nests have become inactive.

If the fence is knocked down or destroyed by the Contractor, the Engineer will suspend the work, wholly or in part, until the fence is satisfactorily repaired at the Contractor’s expense. Time lost due to such suspension will not be considered a basis for adjustment of time charges, but will be charged as contract time.

(B) Work on Structures. The Contractor shall conduct work on structures in a manner that does not result in a taking of migratory birds protected by the Migratory Bird Treaty Act (MBTA). The Contractor shall not conduct the work on structures during the primary birding season, April 1 through August 31, unless the Contractor takes the following actions:

1. The Contractor shall remove existing nests prior to April 1.

2. During the time that the birds are trying to build or occupy their nests, between April 1 and August 31, the Contractor shall monitor the structures at least once every three days for any nesting activity.

3. If the birds have started to build any nests, the nests shall be removed before they are completed. Water shall not be used to remove the nests if nests are located within 50 feet of any surface waters.

4. Installation of netting may be used to prevent nest building. The netting shall be monitored and repaired or replaced as needed. Netting shall consist of a mesh with openings that are ¾ inch by ¾ inch or less.

If an active nest becomes established, i.e., there are eggs or young in the nest, all work that could result in abandonment or destruction of the nest shall be avoided until the young have fledged or the nest is unoccupied as determined by the Contractor’s biologist and approved by the Engineer. The Contractor shall prevent construction activity from displacing birds after they have laid their eggs and before the young have fledged. If the project continues into the following spring, this cycle shall be repeated. When work on the structure is complete, the Contractor shall remove and properly dispose of netting used on the structure. The taking of a migratory bird shall be reported to the Engineer. The Contractor shall be responsible for all penalties levied by the U. S. Fish and Wildlife Service (USFWS) for the taking of a migratory bird.

METHOD OF MEASUREMENT

240.03 Wildlife Biologist will be full compensation for all work and materials required to complete the item, including wildlife biologist, wildlife survey, and documentation (record of nest location and protection method).

Clearing and grubbing will be measured and paid for in accordance with Section 201. Mowing will not be measured and paid for separately, but shall be included in the work.

Fence needed to protect migratory birds and nests will be measured and paid for in accordance with Section 607.

BASIS OF PAYMENT

240.04 The accepted quantities measured as provided above will be paid for at the contract unit price for each of the pay items listed below that appear in the bid schedule.

Pay Item Pay Unit

Wildlife Biologist Hour

REVISION OF SECTION 304

AGGREGATE BASE COURSE

Section 304 of the Standard Specifications is hereby revised for this project as follows:

DESCRIPTION

Subsection 304.01 shall include the following:

Aggregate Base Course (Class 1) as shown in subsection 703.03 shall be used as a replacement for unsuitable subgrade material but only as directed by the Engineer.

MATERIALS

Subsection 304.02 shall include the following:

Materials for the base course shall be Aggregate Base Course (Class 6) as shown in subsection 703.03 The aggregate base course (Class 6) must meet the gradation requirements and have a resistance value of at least

78 when tested in accordance with AASHTO T-190.

The Aggregate Base Course (Class 6) shall not contain any reclaimed asphalt pavement (RAP).

REVISION OF SECTION 403

HOT MIX ASPHALT

Section 403 of the Standard Specifications is hereby revised for this project as follows:

MATERIALS

Subsection 403.02 shall include the following:

The design mix for hot mix asphalt shall conform to the following:

Table 403-1

Property

Test Method

Value For Grading

SX(75) Patching

Air Voids, percent at:

N (design)

CPL 5115 3.5 – 4.5 3.5 – 4.5

Lab Compaction (Revolutions):

N (design)

CPL 5115 75 75

Stability, minimum CPL 5106 28 28

Aggregate Retained on the 4.75 mm (No. 4)

Sieve for SX with at least 2 Mechanically

Induced fractured faces, % minimum

CP 45

Accelerate…