Exhibit C_25693_FederalPkwy Specification.pdf

REQUEST FOR BIDS

For the

FEDERAL PARKWAY WIDENING - 120th AVENUE to 122nd AVENUE to be provided to the

CITY OF WESTMINSTER

City Project No. 17-0045

CDOT Project Control No. 25693

February 18, 2025

SPECIFICATIONS

Do NOT Delete � For CAO Reference:1B-

RFB Construction Services (Outside PM)

City of Westminster February 18, 2025

Federal Parkway Widening � 120th Ave. to 122nd Ave.

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

IV. SPECIFICATIONS

CITY OF WESTMINSTER, COLORADO

The specifications for this project shall consist of the Colorado Department of Transportation 2023

Standard Specifications for Road and Bridge Construction, as modified herein by these Project Special

Provisions.

PROJECT SPECIAL PROVISIONS

Title Date Page No.

Project Special Provisions Index February 18, 2025 2-3

Standard Special Provisions Index February 18, 2025 4

Commencement and Completion of Work February 18, 2025 5

Disadvantaged Business Enterprise (DBE) Contract Goal February 18, 2025 6

On the Job Training Contract Goal February 18, 2025 7

Revision of Section 101 � Definitions and Terms February 18, 2025 8

Revision of Section 102 � Project Plans and Other Data February 18, 2025 9

Revision of Section 108 � Critical Path Method Schedule February 18, 2025 10

Revision of Section 109 � Measurement and Payment February 18, 2025 11

Revision of Section 201 � Clearing and Grubbing February 18, 2025 12

Revision of Section 202 � Removal of Structures and Obstructions February 18, 2025 13

Revision of Section 202 � Clean Valve Box February 18, 2025 14

Revision of Section 202 � Removal of Asphalt Mat February 18, 2025 15-16

Revision of Section 202 � Removal of Asphalt Mat (Planning) February 18, 2025 17-18

Revision of Section 202 � Reclaimed Asphalt Mat Millings February 18, 2025 19

Revision of Section 203 � Excavation and Embankment February 18, 2025 20

Revision of Section 206 � Excavation and Backfill for Culvert, Pipes and Riprap

February 18, 2025 21

Revision of Section 209 � Watering and Dust Palliatives February 18, 2025 22

Revision of Section 210 � Valve Box and Manhole

Adjustments

February 18, 2025 23-24

Revision of Section 213 � Mulching February 18, 2025 25

Revision of Section 214 � Planting February 18, 2025 26

Revision of Section 217 � Noxious Weed Management February 18, 2025 27-32

Revision of Section 240 � Protection of Migratory Birds February 18, 2025 33-36

Revision of Section 240 � Prairie Dog Management February 18, 2025 37-40

Revision of Section 304 � Aggregate Base Course (Class 6) February 18, 2025 41

Revision of Section 401 � Tolerances for Hot Mix Asphalt (Voids

Acceptance)

February 18, 2025 42

Revision of Section 403 � Hot Mix Asphalt February 18, 2025 43-46

Revision of Section 403 � Hot Mix Asphalt Ticket Collection February 18, 2025 47

Revision of Section 506 � Soil Riprap February 18, 2025 48-49

Revision of Section 507 � Concrete Lined Ditch February 18, 2025 50-51

Revision of Section 603 � Storm Drain Pipe February 18, 2025 52-54

Revision of Section 603 � Outlet Structure February 18, 2025 55-56

Revision of Section 603 � Forebay February 18, 2025 57-58

Revision of Section 604 � Manholes and Inlets February 18, 2025 59-60

Revision of Section 604 � Stormwater Treatment Device February 18, 2025 61-64

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

Title Date Page No.

Revision of Section 607 � Fence Wire with Treated Wooden Posts February 18, 2025 65-66

Revision of Section 608 � Concrete Sidewalks, Bikeways and Curb

Ramps

February 18, 2025 67

Revision of Section 614 � Rectangular Rapid-Flashing Beacon February 18, 2025 68

Revision of Section 622 � Bollard February 18, 2025 69-70

Revision of Section 623 � Irrigation System February 18, 2025 71

Revision of Section 625 � Construction Surveying February 18, 2025 72

Revision of Section 630 � Construction Zone Traffic Control February 18, 2025 73-76

Revision of Section 630 � Portable Message Sign Panel February 18, 2025 77-78

Revision of Section 630 � Uniformed Traffic Control (Local Agency) February 18, 2025 79-80

Utilities February 18, 2025 81-87

Force Account Items February 18, 2025 88-89

Federal Parkway Widening – 120th Ave. to 122nd Ave.

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

SSP Index 03-21-2025 [For 2023 Spec Book]

COLORADO

DEPARTMENT OF TRANSPORTATION

SPECIAL PROVISIONS

FEDERAL PARKWAY WIDENING - 120th AVENUE to 122nd AVENUE City Project No. 17-0045

CDOT Project Control No. 25693

STANDARD SPECIAL PROVISIONS

No.

Name Date of Pages

Revision of Section 101 – Definitions and Section 106 - Control of Materials (January 8, 2024) 2 Revision of Sections 101 and 106 – Buy America and Build America, (January 8, 2024) 9 Buy America Requirements for Projects Containing $500,000 or more in Federal-Aid Highway Funding Revision of Section 105 – Asphalt Mat Density (Dec. 26, 2024) 1 Revision of Section 105 – Control of Work (October 1, 2023) 1

Revision of Section 105 – Dispute Review Board and (October 1, 2023) 9

Claims for Unresolved Disputes Revision of Section 105 – E-Signature (January 8, 2024) 1 Revision of Section 105 – Pavement Smoothness (July 1, 2024) 11 Revision of Sections 105 and 106 – Conformity to the Contract of Hot Mix Asphalt (October 1, 2023) 13 (Voids Acceptance) Revision of Section 106 – Control of Material (Sept. 30, 2024) 1 Revision of Section 109 – Asphalt Cement Cost Adjustment (October 1, 2023) 4 (Asphalt Cement Included in the Work) Revision of Section 207 – Topsoil (October 1, 2023) 9 Revision of Section 208 – As-Constructed Survey (October 1, 2023) 3 Revision of Sections 208 and 625 – Permanent Water Quality Survey (April 2, 2024) 2 Revision of Section 212 – Soil Amendments, Seeding, and Sodding (October 1, 2023) 25 Revision of Section 213 – Mulching (Sept. 30, 2023) 1 Revision of Section 401 – Composition of Mixtures – Voids Acceptance (October 1, 2023) 1 Revision of Section 401 – Plant Mix Pavements-General (Subsection 401.17) (January 8, 2024) 4 Revision of Section 401 – Plant Mix Pavements-General (Subsection 401.10) (Sept. 30, 2024) 1 Revision of Section 401 – Reclaimed Asphalt Pavement (October 1, 2023) 2 Revision of Section 401 – Tolerances for Hot Mix Asphalt (Voids Acceptance) (October 1, 2023) 1 Revision of Section 601 – Concrete Acceptance (April 9, 2024) 4 Revision of Section 601 – Pigment in Concrete (July 23, 2024) 1 Revision of Section 627 – Pavement Marking Paint (March 21, 2025) 13 Revision of Section 627 – Pavement Marking Paint (Temporary) (April 2, 2024) 1 Revision of Section 630 – MHT Signature Requirements (Dec. 26, 2024) 1 Revision of Section 713 – Retroreflectors and Drum (Dec. 26, 2024) 4 and Tubular Marker Sheeting Requirements Affirmative Action Requirements Equal Employment Opportunity (October 1, 2023) 13 Disadvantaged Business Enterprise (DBE) Requirements (October 1, 2023) 15 Minimum Wages, Colorado, (March 6, 2025) 10 U.S. Department of Labor General Decision Number CO20240006, Highway Construction for Adams, Arapahoe, Broomfield, Clear Creek, Elbert, Gilpin, Jefferson, and Park counties.

On the Job Training (October 1, 2023) 6 Required Contract Provisions – Federal-Aid Construction Contracts (October 23, 2023) 15

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

COMMENCEMENT AND COMPLETION OF WORK

The CONTRACTOR shall commence work under the contract on or before the 10th day following the

�Notice to Proceed� or the 13th day following the �Notice of Award�, whichever comes later, unless such time for beginning the work is changed by the CITY in the �Notice to Proceed�. The CONTRACTOR shall complete all work within 195 Working Days following the date of �Notice to Proceed.�

Salient Features to be shown on the CONTRACTOR�s progress schedule are:

1. Date of Award

2. Notice to Proceed

3. Mobilization

4. Construction Survey

5. Erosion Control Device Placement

6. Construction Signing

7. Storm Sewer Construction

8. Earthwork

9. Curb and Gutter / Median Cover Material Construction

10. Landscaping and Irrigation

11. Asphalt Paving

12. Permanent Signing and Striping

13. Seeding

14. Letter Of Completion

15. Final Inspection

16. Punch List Repairs

17. Letter of Final Acceptance

Upon completion of the work and before the final payment, the construction drawings shall be submitted to the engineer and submitted to the City in paper, digital .PDF and .DXF formats with the registered professional engineer�s stamp and signature verifying that the plans are complete. Digital copies shall be submitted via 2 discs. As-Constructed submittals shall include corrected horizontal and vertical locations of water fittings, fire hydrants, manholes and inlets and any other related appurtenance. Additionally, water, reclaimed water, sanitary sewer, and storm sewer profile information shall include correct pipe sizes, slopes, lengths, and material types. In addition, �horizontally corrected� line work of the As-

Constructed water, reclaimed water, sanitary sewer, and storm sewer features shall be submitted to the

GIS Division in one of the acceptable GIS formats noted above.

END OF SECTION REVISION

Project Special Provisions

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

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:

12% Percent DBE participation.

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

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 required hours for On the Job Training: 1600 hours

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 101

DEFINITIONS AND TERMS

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

Delete and replace the following definitions in subsection 101.02:

CDOT Resident Engineer. Unless otherwise provided in the Contract, reference to the CDOT

Resident Engineer shall refer to the City of Westminster Project Manager.

Contract. As defined in the General Conditions of the Contract for Construction.

Contract Modification Order. This term shall be interpreted to mean �Change Order� or

�Construction Change Directive� as appropriate, and as defined in the General Conditions of the

Contract for Construction.

Contractor. As defined in the General Conditions of the Contract for Construction.

Department. Unless otherwise provided in the Contract, references to the Department shall refer to the City of Westminster, Colorado.

Engineer. Unless otherwise provided in the Contract, references to the Engineer shall refer to the

Westminster City Manager or designated representative.

Project Engineer. Unless otherwise provided in the Contract, references to the Project Engineer shall refer to the Westminster City Engineer or designated representative.

Region Transportation Director. Unless otherwise provided in the Contract, reference to the

Region Transportation Director shall refer to the Westminster City Capital Improvements

Manager or designated representative.

State. Unless otherwise provided in the Contract, references to the State as the owner shall refer to the City of Westminster, Colorado.

Work. As defined in the General Conditions of the Contract for Construction.

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 102

PROJECT PLANS AND OTHER DATA

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

Subsection 102.05 shall include the following:

The following geotechnical investigations have been conducted for this project and are available for review at the City of Westminster Department of Community Development, 4800 West 92nd Avenue, Westminster, Colorado, 80030. To review the documents, call 303-430-2400 x 2125 for an appointment.

• Geotechnical Investigation, Geotechnical Engineering and Pavement Design Report, Federal Parkway, 120th Avenue to 122nd Avenue, Westminster, Colorado. Prepared by Yeh and Associates, August 29th, 2018.

The Department does not warrant the supplemental data and this information is not considered to be a part of the Contract. If bidders use or modify the supplemental data in preparing a proposal or planning and prosecuting the work, all associated data is used at their own risk, and bidders are responsible for all conclusions, deductions, and inferences drawn from the original or modified supplemental data.

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 108

CRITICAL PATH METHOD SCHEDULE

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

Subsection 108.03 shall include the following:

The CONTRACTOR's progress schedule shall be a Critical Path Method Schedule and shall be submitted in Microsoft Project format.

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 109

MEASUREMENT AND PAYMENT

Section 109 of the Standard Specifications is hereby revised for this project as follows:

Subsection 109.02 shall include the following:

The CITY will not pay for defective work and will not pay for repair or additional work required to bring the project to a point of acceptance.

Bid prices shall include all costs in connection with the proper and successful completion of the Work, including furnishing all materials, equipment and tools; and performing all labor and supervision to fully complete the Work. All work not specifically set forth as a pay item in the Bid Schedule shall be considered a subsidiary obligation of the CONTRACTOR and all costs in connection therewith shall be included in the prices bid for the various items of work. The Total Bid Price shall be interpreted to cover all Work required by the Contract Documents.

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 201

CLEARING AND GRUBBING

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

Subsection 201.02 shall include the following:

The CONTRACTOR shall coordinate identification of all clearing and grubbing removals with the

ENGINEER prior to commencing clearing and grubbing operations.

Burning of perishable material shall not be allowed.

Subsection 201.04 shall include the following:

Pay Item Pay Unit

Clearing and Grubbing Lump Sum

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 202

REMOVAL OF STRUCTURES AND OBSTRUCTIONS

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

Subsection 202.12 shall include the following:

Pay Item Pay Unit

Removal of Riprap Square Yard

Removal of Pipe (Storm) Linear Foot

Removal of End Section Each

Removal of Sidewalk Square Yard

Removal of Concrete Curb & Gutter Linear Foot

Removal of Light Standard Each

Removal of Ground Sign Each

Removal of Fence Linear Foot

Removal of Gate * Each

With the exception of the Removal of Gate, all removals shall become the property of the contractor and disposed of, in accordance with governing City, State and Federal regulations.

* For the Removal of Gate bid item, all materials shall be salvaged and delivered to City Maintenance

Facility, to be designated by the City at the Pre-Construction Conference. Labor, equipment, methods of removal, and delivery to the City Maintenance Facility will not be paid for separately but included in the cost of the designated bid item.

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 202

CLEAN VALVE BOX

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

Subsection 202.02 shall include the following:

The Contractor shall clean each valve box of all foreign debris such that the operating nut of the valve is fully accessible to operation. The Engineer will obtain the Owner�s inspection and written approval before accepting the work.

Subsection 202.12 shall include the following:

Pay Item Pay Unit

Clean Valve Box Each

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 202

REMOVAL OF ASPHALT MAT

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

Subsection 202.01 shall include the following:

This work includes removal and disposal of existing asphalt mat within the project limits as shown on the plans or at locations directed by the Engineer.

Subsection 202.02 shall include the following:

All sawcut lines shall be neat and straight lines. Any additional asphalt removal beyond the sawcut limits shall be at no additional cost to the OWNER.

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

The existing asphalt mat which varies in thickness from 2.5 inches to 6 inches shall be 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 shall be either disposed of outside the project site, or used in one or more of the following ways:

1. Used in embankment construction in accordance with subsection 203.07(c).

2. Placed in bottom of fills as approved by the Engineer.

3. Recycled into the hot mix asphalt.

4. Placed in the subgrade soft spots as directed by the Engineer.

Subsection 202.03 shall include the following:

Any and all material scheduled for removal shall become the property of the CONTRACTOR. The

CONTRACTOR shall properly dispose of all material from the site except items specifically identified by the ENGINEER to remain.

Subsection 202.11 shall include the following:

The removal of the existing asphalt mat will be measured by the square yard of mat removed to the required depth and accepted.

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 202

REMOVAL OF ASPHALT MAT

Subsection 202.12 shall include the following:

Payment will be made under:

Pay Item Pay Unit

Removal of Asphalt Mat Square Yard

Unless otherwise specified in the Contract, the disposal of the asphalt mat or its use in other locations on the project will not be measured and paid for separately but shall be included in the work.

Asphalt sawcutting will not be paid separately but will be included in Item 202 Removal of Asphalt.

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 202

REMOVAL OF ASPHALT MAT (PLANING)

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

Delete subsection 202.09 and replace it with the following:

202.09 Removal of Asphalt Mat

a) Removal of Asphalt Mat (Planing) Application: This item of work shall apply to all rotomill and overlay areas identified on the plans.

Prior to beginning planing operations, the Contractor shall submit a planing plan and a Process Control

Plan (PCP) for approval by the Engineer. The planing plan shall include at a minimum:

(1) The number, types and sizes of planers to be used.

(2) The width and location of each planing pass.

(3) The number and types of brooms to be used and their locations with respect to the planers.

(4) The proposed method for planing and wedging around existing structures such as manholes, valve boxes, and inlets.

(5) The longitudinal and transverse typical sections for tie-ins at the end of the day.

(6) If requested by the Engineer, a plan sheet showing the milling passes.

The PCP shall include as a minimum:

(1) The schedule for replacing the cutting teeth.

(2) The daily preventive maintenance schedule and checklist.

(3) Proposed use of automatic grade controls.

(4) The surface testing schedule for smoothness.

(5) The process for filling distressed areas.

(6) The schedule for testing macrotexture of the milled surface.

(7) Corrective procedures if the milled surface does not meet the minimum macrotexture specification.

(8) Corrective procedures if the milled surface does not meet the minimum transverse or longitudinal surface finish when measured with a 10-foot straightedge.

The Contractor shall not start the planing operation until the hot mix asphalt (HMA) mix design has been approved by the Engineer.

The existing pavement shall be milled to the cross-slope as shown on the plans and shall have a surface finish that does not vary longitudinally or transversely more than ⅜ inch from a 10-foot straightedge. A

10-foot straightedge shall be supplied by the Contractor.

All milled surfaces shall be broomed with a pick-up broom, unless otherwise specified, before being opened to traffic. A sufficient number of brooms shall be used immediately after planing to remove all milled material remaining in the roadway.

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 202

REMOVAL OF ASPHALT MAT (PLANING)

b) Removal of Asphalt Mat (Planing) (Special) Application: This item of work shall apply to asphalt planing for median curb and gutter, as specified in the plans. In these areas, the existing pavement shall be milled to an approx. depth of 6�, allowing for construction of the median curb and gutter directly on top of the remaining asphalt surface.

BASIS OF PAYMENT

Subsection 202.12 shall be modified as follows:

Payment will be made under:

Pay Item Pay Unit

Removal of Asphalt Mat (Planing) SY

Removal of Asphalt Mat (Planing) (Special) SY

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 202

RECLAIMED ASPHALT MAT MILLINGS

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

Subsection 202.09 shall include the following:

The Contractor shall take possession of ALL of the Reclaimed Asphalt Pavement (RAP) millings removed from the existing asphalt mat on this project.

Subsection 202.12 shall include the following:

Unless otherwise specified in the Contract, the disposal and hauling of the RAP millings to other locations or its use on the project or at other locations will not be measured and paid for separately but shall be included in the work.

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 203

EXCAVATION AND EMBANKMENT

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

Subsection 203.03, first paragraph, shall include the following:

Embankment material shall meet the following requirements for Atterberg limits and gradation:

(1) Maximum plasticity index of 15.

The upper 3 feet of embankment material below the subgrade elevation shall have a Resistance value of at least 10 when tested by the Hveem Stabilometer or the equivalent resilient modulus.

The Contractor is responsible for ensuring any offsite materials imported into the project meet the specified material requirements before delivering to the project site. Any costs incurred for material sampling and testing prior to delivery will not be paid for separately but shall be included in the work.

All trench backfill and subgrade preparation shall be tested to ensure compliance with City of

Westminster standards and shall be tested at City of Westminster required frequencies by a City of

Westminster approved private soils testing firm. Test results shall be submitted to, reviewed, and approved by the City of Westminster Engineering Division prior to installing base course, asphalt or concrete on prepared subgrade. All base course density shall also be tested by the private soils firm at

City of Westminster required frequencies to ensure compliance with City of Westminster requirements.

Base course test results shall also be approved by the City of Westminster Engineering Division prior to installing pavement. All concrete and asphalt placed shall be tested in accordance with City of

Westminster minimum materials testing standards. Test results shall be reviewed and approved by the

City of Westminster Engineering Division prior to final completion, acceptance, and release of retainage.

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTIONS 206

EXCAVATION AND BACKFILL FOR CULVERTS, PIPES AND RIPRAP

Section 206 of the Standard Specifications is hereby revised for this project as follows:

Subsection 206.07 shall include the following:

Structure Excavation, structure backfill, and unclassified excavation required for all waterlines, sanitary sewers, storm sewers, riprap, grouted riprap, pipe culverts, and pipe culvert extensions, including end sections, will not be measured and paid for separately but shall be included in the work. Earthwork for pipes complete in place will not be paid for separately but shall be included in the work and excavated to the required depth and backfilled to finished grade in accordance with M 206-1.

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 209

WATERING AND DUST PALLIATIVES

Section 209 of the Standard Specifications is hereby revised for this project as follows:

Subsection 209.05 shall include the following:

The CONTRACTOR shall be responsible for controlling vehicle and equipment speeds within the project site to keep dust to a minimum. If excessive dust is being generated by construction traffic, the

CONTRACTOR shall immediately take corrective measures.

In Subsection 209.08, delete paragraph three and replace with the following:

Water required for all work covered under the contract will not be measured and paid for separately but shall be included in the work. The source of this water is the CONTRACTOR�s responsibility. Water may not be taken from on-site ditches, creeks, or their tributaries.

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 210

VALVE BOX AND MANHOLE ADJUSTMENTS

Section 210 of the Standard Specifications is hereby revised for this project as follows:

Subsection 210.10 shall include the following:

The Contractor shall notify each utility company (Owner) prior to any construction that will involve the adjustment of its valve boxes or manholes.

Each Owner will mark all of its valve boxes and manholes that will be involved in the specified construction area.

Prior to commencing construction, the Contractor shall coordinate and conduct, with the Engineer and each Owner, an inspection of all impacted manholes and valve boxes. The purpose of this inspection will be to account for all valve boxes and manholes involved in the construction and determine their accessibility and condition. The Contractor shall provide traffic control for this inspection and for the final inspection. The Contractor shall coordinate construction with the Owner to allow sufficient time for the Owner to make all necessary repairs to valve boxes and manholes before construction begins in the area of the valve boxes and manholes. All parties shall agree on the condition of each valve box and manhole prior to construction.

The Contractor shall replace all valve box sections damaged or misplaced during construction with new valve box sections complying with the requirements of the Owner�s specifications. The Contractor shall set each valve box to be adjusted so that it is ¼ inch to ½ inch below the final grade of the paved surface, or to the satisfaction of the Owner, and so that it is plumb over the operating nut of the valve.

The Contractor shall adjust all manholes that require adjustment with materials conforming to the

Owner�s specifications. Some adjustments may require the addition, removal, or replacement of a manhole or cone section. If manhole adjustment requires a manhole cone or barrel section to be added, removed, or replaced, this work will not be considered as "Adjust Manhole", but shall be performed in accordance with the Section 210 requirements for the item "Modify Manhole".

The Contractor shall prevent tools, concrete, dirt, or debris of any kind from falling into the channel of the existing manhole. The Contractor shall clean or remove debris from downstream sewer that enters as a result of the Contractor�s work.

When the project includes planing prior to resurfacing, the Contractor shall first lower all valve boxes and manholes below the surface to be planed and then adjust them up to final grade after the paving operation is complete.

Prior to the final inspection, the Contractor shall thoroughly clean all valve boxes designated for cleaning.

This work shall be performed in accordance with the Section 202 requirements for the item "Clean Valve

Box".

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 210

VALVE BOX AND MANHOLE ADJUSTMENTS

The Contractor shall coordinate and conduct, with the Engineer and each Owner, a final inspection upon completion of construction. This inspection shall assure that all valve boxes and manholes are in compliance with these requirements. The Engineer will obtain the Owner�s written approval before accepting the work.

Subsection 210.12 shall include the following:

The Contractor will be paid separately for each valve box or manhole adjustment completed down and for each adjustment completed up.

Subsection 210.13 shall include the following:

Payment will be made under:

Pay Item Pay Unit

Adjust Valve Box Each

Adjust Manhole Each

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 213

MULCHING

Section 213 of the Standard Specifications is hereby revised for this project as follows:

In subsection 213.02 (a) shall include the following:

Materials and locations for specified mulching shall be as provided in the landscaping plan sheets.

BASIS OF PAYMENT

Subsection 213.05 shall include the following:

Pay Item Pay Unit

Mulching (Wood Strand) Acre

Mulching (Weed Free) Acre

Payment will be full compensation for all work necessary to complete the work.

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 214

PLANTING

Section 214 of the Standard Specifications are revised as follows:

Subsection 214.06 shall include the following:

Payment will be made under:

Pay Item Pay Unit Deciduous Shrub (#5 Container) Each Evergreen Shrub (#5 Container) Each Perennials (#1 Container) Each

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF SECTION 217

NOXIOUS WEED MANAGEMENT

Section 217 of the Standard Specifications is hereby deleted and replaced with the following:

217.01 This work consists of furnishing and applying herbicides, providing mechanical and cultural controls to prevent or control plant growth in areas as shown on the plans or designated.

MATERIALS

217.02 All herbicide labels shall be currently registered with the Colorado Department of Agriculture and the

U.S. Environmental Protection Agency. All herbicides shall be supplied to the project in labeled containers.

The labels shall show the product name, chemical composition, expiration date, and directions for use.

CONSTRUCTION REQUIREMENTS

217.03 All herbicides shall be applied by a qualified applicator who is commercial pesticide applicators licensed by the Colorado Department of Agriculture as a qualified applicator. The Contractor shall furnish documentation of such licensing prior to herbicide application to the Engineer. Herbicide mixing and application shall be done in accordance with instructions on the registered product label. The Contractor shall furnish the Engineer such label information prior to mixing or application.

The Contractor shall notify the Engineer at least 24 hours prior to each herbicide application and shall indicate the time and location application will begin. Application will not be allowed on Saturdays, Sundays, or holidays unless otherwise approved by the Engineer.

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

Noxious weeds observed in and near the construction area will be spot 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

Herbicides shall not be applied when weather conditions, including wind conditions, are unsuitable for such work. Herbicides shall not be applied when soil is extremely dry.

Herbicide treatments shall avoid native flowering plants to minimize impacts to pollinators.

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.

Herbicide application method shall be such that plant growth outside the designated treatment areas will not be damaged. All damage caused by improper herbicide application shall be repaired at the Contractor's expense.

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NOXIOUS WEED MANAGEMENT

Noxious weed treatments shall target observed species and species listed in the in the Project Weed

Management Plan Table 217.04. 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

Project Weed Management Plan

Table 217.04

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.

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

(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.

Common mullein

(Verbascum

Thapsus)

Biennial forb. The first year of the plant it produces a basal rosette. In spring of the second year, the plant bolts an erect stem that grows 2 to 6 feet tall.

The plant has a deep taproot along with a fibrous root system.

C Mechanical: Hand pull or dig when soil is moist prior to flowering/seed production. If flowers are present, bag specimens carefully so as not to scatter seeds.

Herbicide Control: Chlorosulfuron, 2,4D, Picloram, or Metsulfuron applied to rosettes in spring or fall.

Cultural Control: Reseed with native seed mix in fall to compete with grass in spring.

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Common teasel

(Dipsacus fullonum)

Biennial or short-lived perennial forb that can grow to over 6 feet tall and has a tap root.

Flowers from April to

September and reproduces by seed.

Invasive in moist soils.

B Mechanical Control: Sever roots below the soil surface during the first year before the plant stores energy, and in the second year before seed production. If flowers are present, bag specimens carefully so as not to scatter seeds.

Herbicide Control: Mesulfuron (Escort XP), Aminopyralid (Milestone), or Imazapic (Plateau).

Apply when in rosette (spring or fall) or bolting growth stage (early summer).

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

Cutleaf teasel

(Dipsacus laciniatus)

Biennial or short-lived perennial forb that can grow to over 6 feet tall and has a tap root.

Flowers from April to

September and reproduces by seed.

Invasive in moist soils.

B Mechanical Control: Sever roots below the soil surface during the first year before the plant stores energy, and in the second year before seed production. If flowers are present, bag specimens carefully so as not to scatter seeds.

Herbicide Control: Mesulfuron (Escort XP), Aminopyralid (Milestone), or Imazapic (Plateau).

Apply when in rosette (spring or fall) or bolting growth stage (early summer).

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

Field bindweed

(Convolvulus arvensis)

Long-lived perennial;

Construction could increase the plants abundance due to its ability to spread rapidly on disturbed sites and to grow from root fragments.

C Mechanical Control: Cutting, mowing, or pulling is generally not effective.

Herbicide Control: Clarity + 2,4-D Amine or

Roundup Ultra applied at full-bloom and/or fall.

Cultural Control: Reseed with native seed mix.

Leafy spurge

(Euphorbia esula)

Deep-rooted perennial forb that spreads by both seed and extensive creeping roots.

Emerges in early spring.

B Mechanical Control: Hand pulling is not a viable option. Repeated mowing provides little long-term control

Herbicide Control: Aminocyclopyrachlor + chlorsulfuron (Persepective) and

Diflufenzopyr +dicamba (Overdrive, Distinct):

apply in spring and/or fall

Cultural Control: Reseed with native seed mix

Musk thistle

(Carduus nutans)

Aggressive biennial weed that produces only from seed.

B Mechanical Control: sever the root below the soil surface. If flowers are present, bag specimens carefully so as not to scatter seeds. Mowing is most

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Typically produces rosette in first year of growth then flowers and produces seed in second year.

effective when plants are at full bloom.

Herbicide Control: Aminopyralis, Metsulfuron, or

Chlorsulfuron primarily in spring. Aminopyralis and

Cloyralid can be used on fall rosettes.

Cultural Control: Reseed with native seed mix.

Perennial

Pepperweed

(Lepidium latifolium)

Invasive perennial forb that reproduces by seed and vegetatively by roots and shoots.

B Mechanical Control: not recommended due to deep, brittle roots.

Herbicide Control: Chlorsulfuron, Metsulfuron, or

Imazapic in early Spring to early summer when plant is in the early flower to flowering growth stages.

Cultural Control: Reestablish native plants

Perennial

Sowthistle

(Sonchus arvensis)

Perennial forb that produces by seeds and the rhizometous root systems. Plants over winter and begins to appear early in Spring.

C Mechanical Control: Tilling and mowing plant populations where possible.

Herbicide Control: 2 4-D + Dicamba or Picloram may be applied in the rosette to early boting stage.

Aminopyralid, may be applied to rosette or early growth. Clopyralid may be applied to the rosette to bud stages.

Cultural Control: Maintain health plant populations and minimize disturbance

Russian olive

(Elaeagnus angustifolia)

Deciduous tree with a deep tap root.

B Herbicide and Mechanical Control: Cut the trunks and apply herbicide applications of Triclopyr or

Glyphosate to cut trunks or cut stems. Treat seedlings in spring with picloram, dicamba or glyphosphate in combination with mechanical control. Triclopyr + Aminopyralid can be use as foliar treatment ay to September.

Cultural Control: Replant with native cottonwoods or willows with native grasses.

Salt Cedar

(Tamarix spp.)

Non-native deciduous evergreen shrub or small tree that grows from 5 to 20 feet tall.

Reproduces by seeds as well as vegetatively.

B Mechanical Control: Chainsaws, or loppers for smaller plants, are effective for cut-stump treatments for smaller infestations.

Herbicide Control:

Triclopyr (Garlon 4, Remedy): cut-stump treatment or basal bark treatment (summer to fall).

Glyphosate (Rodeo � approved aquatic label): cut-stump treatment (summer to fall).

Tricloypr (Garlon 4, Remedy) + Aminopyralid

(Milestone): broadcast foliar treatment � apply when plants are growing rapidly (May to

September).

Cultural Control: Reseed with native seed mix or

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revegetate with willow stakes or other shrubs.

Siberian elm

(Ulmus pumila)

Fast growing tree distinguished by small toothed leaves about 1-

2 ½ in long and pointed at the tip. Mature trees may reach a height of

50-70 feet. Spread primarily via seed;

roots resprout when top growth is damage.

Quickly outcompetes natives.

C Mechanical Control: Can be effective when combined with herbicide treatment. Seedlings can be grubbed with a shovel or other tool.

Herbicide Control: Mid- to late summer foliar application of glyphosate or triclopyr are the most effective on Siberian elms less than 6 feet in height or on resprouts, but shall not be used where injury to nearby plantings may occur or within 30 days of planting nearby shrubs and trees. Cut-stump treatment with glyphosate is effective for larger individuals. Basal bark treatment using triclopyr can be highly effective for controlling smaller trees less than 8 ft tall with stems that are 2 to 3 inches in diameters.

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.

Watch List Species have been determined to pose a potential threat to the agricultural productivity and environmental values of the lands of the state. The Watch List is intended to serve advisory and educational purposes only. Its purpose is to encourage the identification and reporting of these species to the Commissioner in order to facilitate the collection of information to assist the Commissioner in determining which species should be designated as noxious weeds.

Topsoil sources shall only have herbicides applied by the spot spray method.

METHOD OF MEASUREMENT

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

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approved by the Engineer.

Reapplication of herbicide required due to inappropriate timing of the original application will not be measured or paid for.

BASIS OF PAYMENT

217.06 The accepted quantities of herbicide treatment will be paid for at the contract unit price per square yard or per hour.

Payment will be made under:

Pay Item Pay Unit

Herbicide Treatment Hour

Water will not be measured and paid for separately but shall be included in the work.

Mowing, pulling, and bagging will not be measured and paid for separately but shall be included in the work.

Seeding shall be paid for according to 212 Seeding.

END OF SECTION REVISION

City of Westminster Project No. 17-0045 / CDOT Project Control No. 25693

REVISION OF 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.

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 February 15 and October 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, including surveys for Burrowing Owls

(Athene cunicularia), 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 October 31 and before

February 15, then the requirements set forth in this specification are not required. In Colorado, most nesting and rearing activities occur between April 1 and August 31, but raptors may nest as early as

February 15. Burrowing Owls are highly associated with black-tailed prairie dog colonies in Colorado and may be present through October 31.

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) Raptor Nest Survey. The wildlife biologist shall conduct raptor nest surveys within 0.5 mile of the construction site prior to the start of construction. This survey can be done with binoculars. If construction activities are located within Colorado Parks and Wildlife (CPW) recommended buffer zone for specific raptors, "NO WORK" zones shall be established around active sites during construction according to the CPW standards or as recommended by the wildlife biologist in consultation with CPW. The "NO WORK" zone shall be marked with either fencing or signing. Work shall not proceed within a �NO WORK� zone until the wildlife biologist has determined that the young have fledged or the nest is unoccupied.

(B) A Burrowing Owl survey will be conducted by a qualified wildlife biologist at all black-tailed prairie dog colonies if construction or prairie dog management activities begin between March 15 and October 31. Surveys shall follow the recommended survey protocol by Colorado Parks and

Wildlife (CPW 2020).

a. If Burrowing Owls are confirmed to be present in the colony one of two options may utilized after coordination with CPW:

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BIOLOGICAL WORK PERFORMED BY THE CONTRACTOR�S BIOLOGIST

i. No disturbance will be allowed until it can be confirmed that owls have left the area, or

ii. The owl activities within the colony will be carefully monitored and holes/burrows utilized by owls will be marked. When all burrowing owl holes/burrows have been marked, no disturbance will be allowed within 220 yards (660 feet) of the holes/burrows.

(C) 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 (raptors may nest as early as

February 15). All areas scheduled for clearing and grubbing between February 15 and August 31 shall first be surveyed by the wildlife biologist within 50 feet of the work limits for active migratory bird nests, including raptors. Contractor personnel shall enter areas outside CDOT right-of-way 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 February 15 or after August 31 if possible. If tree and shrub removal or trimming will occur between February 15 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.