CDOT Project No. AQC M361-013 (25614) October 15, 2025 Issued for Bid

COLORADO DEPARTMENT OF TRANSPORTATION – SPECIAL PROVISIONS

WADSWORTH PATH – 32ND AVENUE TO 35TH AVENUE

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

PROJECT SPECIAL PROVISIONS

Page Index Pages (October 15, 2025) 1 - 3 Commencement and Completion of Work (October 15, 2025) 4 On the Job Training Contract Goal (October 15, 2025) 5 Revision of Section 101 – Definition and Terms (October 15, 2025) 6 Revision of Section 102 – Project Plans and Other Data (October 15, 2025) 7 Revision of Section 105 – Order of Precedence (October 15, 2025) 8 Revision of Section 105 – Cooperation Between Contractors (October 15, 2025) 9 Revision of Section 107 – Right of Way Restrictions (October 15, 2025) 10-11 Revision of Section 202 – Removal of Structures and (October 15, 2025) 12 Obstructions Revision of Section 202 – Removal of Meter Vault (October 15, 2025) 13 Revision of Section 202 – Removal of Concrete Box Culvert (October 15, 2025) 14 Revision of Section 202 – Removal of Power Pole (October 15, 2025) 15 Revision of Section 202 – Clean Culvert (October 15, 2025) 16-17 Revision of Section 203 – Combination Loader (October 15, 2025) 18 Revision of Section 210 – Reset Structure (October 15, 2025) 19 Revision of Section 210 – Reset Water Meter (October 15, 2025) 20-21 Revision of Section 210 – Adjust Cleanout (October 15, 2025) 22 Revision of Section 210 – Modify Manhole (October 15, 2025) 23 Revision of Section 212 – Landscape Restoration (October 15, 2025) 24 Revision of Section 213 – Rock Mulch (Weed Free) (October 15, 2025) 25 Revision of Section 214 – Landscape Maintenance (October 15, 2025) 26-28 Revision of Section 217 – Noxious Weed Management (October 15, 2025) 29-34 Revision of Section 240 – Protection of Migratory Birds (October 15, 2025) 35-38 Revision of Section 304 – Aggregate Base Course Class 6 (October 15, 2025) 39 Revision of Section 304 – ¾” Crushed Rock (October 15, 2025) 40 Revision of Section 403 – Hot Mix Asphalt (Patching) (October 15, 2025) 41-44 Revision of Section 603 – Reinforced Concrete Pipe (October 15, 2025) 45 Revision of Section 604 – WR Curb Inlet (Single) (October 15, 2025) 46 Revision of Section 607 – Fence Chain Link (Special) (42 Inch) (October 15, 2025) 47-48 Revision of Section 607 – 6 Foot Gate (Chain Link) (October 15, 2025) 49 Revision of Section 608 – Concrete Curb Ramp (October 15, 2025) 50-51 Revision of Section 608 – Sidewalk Drain (October 15, 2025) 52 Revision of Section 609 – Curb Type 2 (Section B) (Special) (October 15, 2025) 53 Revision of Section 609 – Light Standard (Decorative) (October 15, 2025) 54 Revision of Section 609 – Meter Power Pedestal (October 15, 2025) 55

PROJECT SPECIAL PROVISIONS

Revision of Section 616 – Trash Guard Special (October 15, 2025) 56 Revision of Section 619 – Connect to Existing Waterline (October 15, 2025) 57-58 Revision of Section 622 – Ridestop (October 15, 2025) 59-60 Revision of Section 623 – ¾ Inch Water Meter (October 15, 2025) 61 Revision of Section 626 – Public Information Management (October 15, 2025) 62-68 (Tier III) Revision of Section 630 – Pedestrian Barricade (ADA) (October 15, 2025) 69-70 Revision of Section 630 – Portable Message Sign Panel (October 15, 2025) 71-72 Revision of Section 630 – Impact Attenuator (Temporary) (October 15, 2025) 73-74 Force Account Items (October 15, 2025) 75 Traffic Control Plan – General (October 15, 2025) 76-77 Utilities (October 15, 2025) 78-85

STANDARD SPECIAL PROVISIONS

Name Date

Pages

Revision of Section 103 – Escrow of Proposal Documentation

(July 1, 2025) 3

Revision of Section 105 – Project First (June 11, 2025) 4

Revision of Section 105 – Dispute Resolution, Dispute Review Claims for Unresolved Disputes

(June 11, 2025) 24

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

(September 11, 2025) 1

Revision of Section 108 – Liquidated Damages (July 1, 2025) 1

Revision of Section 207 – Topsoil (July 1, 2025) 9

Revision of Section 212 – Soil Amendments, Seeding, and Sodding

(July 1, 2025)

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

(July 1, 2025) 4

Revision of Section 401 – Reclaimed Asphalt Pavement (July 1, 2025) 2

Revision of Sections 412 and 601 – Accelerated Pavement Repair Concrete

(June 11, 2025) 5

Revision of Sections 412 and 705 – Preformed Compression Seals

(July 1, 2025) 2

Revision of Section 601 – Pigment in Concrete (July 1, 2025) 1

Revision of Section 601 – Structural Concrete (September 11, 2025) 1

Revision of Section 627 – Pavement Marking Paint (July 1, 2025) 15

Affirmative Action Requirements Equal Employment Opportunity

(July 1, 2025) 13

Certified Payroll Requirements for Construction Contracts (July 1, 2025) 1

Minimum Wages, Colorado, U.S. Department of Labor General Decision Number CO20250006, Mod 1, Highway Construction for Adams, Arapahoe, Broomfield, Clear Creek, Elbert, Gilpin, Jefferson, and Park counties.

(March 6, 2025) 10

On the Job Training (July 1, 2025) 6

Required Contract Provisions – Federal-Aid Construction Contracts

(July 1, 2025) 15

Commencement and Completion of Work

(Working or Calendar Day)

The Contractor shall commence work under the contract on or before the 5th day following the “Notice to Proceed” unless such time for beginning the work is changed by the City of Wheat Ridge in the “Notice to Proceed.” The Contractor shall complete all work within 220 working days per the "Notice to Proceed" excluding the no work period between the conclusion of Phase 1 and the commencement of Phase 2, approximately July 1st, 2026 to October 1st, 2026.

Work on Rocky Mountain Water Company facilities necessary for the conveyance of irrigation flows (Phase 2) shall only occur during the non-irrigation season (November 1st to April 1st). The Contractor may commence work on Rocky Mountain Water Company facilities prior to November 1st only with written permission from both the City of Wheat Ridge and the Rocky Mountain Water Company. Work on these facilities shall not commence unless said work can be completed to the satisfaction of the Rocky Mountain Water Company prior to the spring resumption of flows in the ditch.

Stockpiling of materials before the beginning date is subject to the Engineer's approval. If such approval is given, stockpiled material will be paid for per Sections 109 and 626. The staging area identified for the project shall only be used for the Phase 2 portion of the project.

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 = 1,000 Hours

Revision of Section 101 Definitions and Terms

Revise Subsection 101.02 of the Standard Specifications for this project as follows:

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

“Department” shall mean the Colorado Department of Transportation.

“Engineer” shall mean the City of Wheat Ridge or their designated representative.

“Laboratory” shall mean the City of Wheat Ridge or their designated representative.

“Project Engineer” shall mean the City of Wheat Ridge or their designated representative.

“Region Transportation Director” shall mean the City of Wheat Ridge or their designated representative.

“State” shall mean the Colorado Department of Transportation.

Revision of Section 102 Project Plans and Other Data

Revise Section 102 of the Standard Specifications for this project as follows:

Subsection 102.05 shall include the following:

Supplemental data is provided in LandXML and DWG file formats upon request from the City to the successful bidder. The supplemental data transmitted consists of:

(a) Project Alignments - LandXML file generated of all alignments

(b) Surfaces – LandXML files of the following:

(1) Existing Surface

(2) Finished Grade Surface

(c) DWG files:

(1) Project Design Model

(2) Right of Way

(3) Topography

(4) Additional files include – Discipline Design Files

(5) Other Files – As needed per project

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

The City has the following additional subsurface investigation data in its possession that the contractors may obtain consistent with the terms and understanding of Project Specification Section 102.05 - Examination of Plans, Specifications, Special Provisions and Site of Work.

The following listed documents are not warranted by the City or the Preparer and the information they contain is not considered to be a part of the Contract.

1) Geotechnical Engineering Report for Wadsworth Path 32nd Avenue to 35th Avenue prepared by Olsson.

2) Subsurface Utility Engineering Report for City of Wheat Ridge - Wadsworth 32nd to 35th prepared by Triunity.

Revision of Section 105 Order of Precedence

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

Subsection 105.09 shall be revised as follows:

These specifications, the supplemental specifications, the plans, special provisions, and all supplementary documents are essential parts of the Contract, and a requirement occurring in one is as binding as though occurring in all. They are intended to be complementary and to describe and provide for a complete work.

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

(a) Contract

(b) Special Provisions

1. Project Special Provisions

2. Standard Special Provisions

(c) Plans

1. Detailed Plans

2. Standard Plans

3. Calculated dimensions will govern over scaled dimensions.

(d) Supplemental Specifications

(e) Standard Specifications

(f) Federal-Aid Agreement Provisions for Construction Agreements (FHWA Form 1273)

(g) Additional Federal Requirements

(h) FFATA Supplemental Federal Provisions

(i) City of Wheat Ridge General Conditions

Revision of Section 105 Cooperation between Contractors

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

Subsection 105.10 shall include the following:

Other construction contractors may be working in the vicinity of the project. The Contractor shall conduct the work so as not to interfere with or hinder the progress or completion of the work being performed by other agencies or contractors. All traffic control and detour conflicts that arise between the needs of the various construction contractors and other agencies shall be brought to the attention of the Engineer. The Engineer will decide the method of resolution.

Other construction projects anticipated in the project vicinity and project contacts include:

Wadsworth Widening (21006):

Contact Email Phone # Daniel Martinez dmartinez@ci.wheatridge.co.us 303-235-2863

32nd Avenue Intersection Improvements (24144):

Contact Email Phone # Grant Rilling grant.rilling@state.co.us 303-757-9414 mailto:dmartinez@ci.wheatridge.co.us mailto:grant.rilling@state.co.us

Revision of Section 107 Right of Way Restrictions

Revise Section 107 of the Standard Specifications for this project as follows:

Subsection 107.19 shall include the following:

The Contractor is hereby made aware that at the time of bidding on this project, the City does not have possession of all necessary Right of Way and Easements required to complete portions of this project and has identified the following locations as “No Work Areas” until the Restriction Dates shown below.

Parcel Number Ownership Name Restriction

Date Construction

Phase

RW-1, PE-1, TE -1 Kishore J. Ramjiani 12/5/25 2

RW-2, RW-2A, TE-2

Jeffco Housing

Corporation 12/5/25 2

RW-3, TE-3

Yukon Grove Homeowners

Association, Inc.

12/29/25 2

RW-4, RW-4A, TE-4

A.W. Hoppa and Carolyn S. Power

11/21/25 2

RW-6, PE-6, TE-6 Mike Ford 12/29/25 1

RW-7, RW-7A, PE-7, TE-7 Rosalind Cooper 12/29/25 1

RW-8, PE-8, TE-8

Daniel F. Boise and

Mary Jane Boise 12/29/25 1

RW-9, PE-9, TE-9

Oak Hill Apartments

VIII, LLC

12/29/25 1

RW-10, RW-10A, PE-10, TE-10 36 Angus LLC 12/29/25 1

Construction activities shall not commence until one of the following conditions is met:

1. All right-of-way and easements on Phase 1 properties have been acquired (Parcels 6, 7, 8, 9, 10).

2. All right-of-way and easements on Phase 2 properties have been acquired (Parcels 1, 2, 3, and 4) AND the work can be started/completed during the dry season (November 1st to April 1st).

Work on Rocky Mountain Water Company facilities necessary for the conveyance of irrigation flows (Phase 2) shall only occur during the non-irrigation season (November 1st to April 1st). The Contractor may commence work on Rocky Mountain Water Company facilities prior to November 1st only with written permission from both the City of Wheat Ridge and the Rocky Mountain Water Company. Work on these facilities shall not commence unless said work can be completed to the satisfaction of the Rocky Mountain Water Company prior to the spring resumption of flows in the ditch.

-2- Revision of Section 107

Right of Way Restrictions

When bidding, the Contractor is advised that they shall not enter the Parcels identified above prior to the dates indicated, unless otherwise directed in writing by the City. It is anticipated that a Notice to Proceed will be provided for Phase 1 around March 4th, 2026.

CDOT anticipates no delay toward completion of the project due to the restrictions imposed herein. No additional time or mobilization costs shall be granted to the Contractor for delays associated with not having possession of the above mentioned locations prior to the dates specified above.

The City will notify the Contractor in writing when sufficient right-of-way and easement access has been obtained to allow work to proceed in “No Work Areas”.

Notice to Proceed for each Phase of the project will not be issued until all acquisitions are complete for the respective Phase.

Revision of Section 202 Removal of Structures and Obstructions

Revise Section 202 of the Standard Specifications for this project as follows:

Subsection 202.12 shall include the following:

The following removals are included in the lump sum cost of Removal of Structures and Obstructions:

• Removal of the sidewalk chase drain at approximately Wadsworth Boulevard HCL Sta. 105+50.

• Removal of the concrete headwall and wingwalls for the PVC drain pipe at approximately Wadsworth Boulevard HCL Sta. 105+50.

• Removal of the concrete headwall and headgate infrastructure at approximately Wadsworth Boulevard HCL Sta. 109+40, 72’ LT.

• Removal of the concrete drop structure at approximately Wadsworth Boulevard HCL Sta. 109+70, 65’ LT.

Pay under:

Pay Item Pay Unit Removal of Structures and Obstructions Lump Sum

Payment will be for all materials, equipment, and labor necessary to completely remove the identified structures and obstructions to the satisfaction of the Engineer.

Removal of Meter Vault

Subsection 202.02 shall include the following:

The Contractor shall remove existing meter vaults as shown on the plans or as directed by the Engineer. Meters are not anticipated in meter vaults noted for removal but if encountered, the Contractor shall contact Wheat Ridge Water District prior to removal. Abandoned service lines shall remain in place and not be disturbed.

Excavations resulting from vault removal shall be backfilled with suitable material and compacted. Surface restoration shall match adjacent conditions unless otherwise specified.

Subsection 202.11 shall include the following:

Removal of Meter Vault will be measured by the actual number of existing meter vaults removed and disposed of. Removal of meter vaults required as a part of water meter resets will not be paid separately but is included in the cost of Reset Water Meter.

Subsection 202.12 shall include the following:

Pay under:

Removal of Meter Vault Each

Removal of Concrete Box Culvert

The cavity left by the removal of the existing concrete box culvert shall be backfilled with structural fill in lifts not exceeding 8 inches in loose thickness and compacted to at least 95% of the maximum dry density as determined by AASHTO T 180 1. The moisture content of the fill material should be within -2 to +2 percent of the optimum moisture content. Structural fill shall consist of non-plastic granular materials having the following properties:

• 35 percent passing the No. 200 sieve,

• Liquid limit less than 45,

• Plasticity index less than 25,

• And maximum swell potential of 1 percent under an inundation pressure of 500 psf

Soils with properties outside of these values will require removal and replacement.

Subsection 202.12 shall include the following:

Pay under:

Removal of Concrete Box Culvert Linear Foot

Payment for Removal of Concrete Box Culvert will be full compensation for all labor, materials, and equipment needed to complete the work including backfill.

Removal of Power Pole

The Contractor shall remove existing power poles as shown on the plans. The power poles to be removed are located at approximately Sta. 113+45 and Sta. 114+15. Prior to removal of the power poles, the Contractor shall coordinate with Xcel Energy to disconnect abandoned overhead power lines spanning the two poles to be removed.

Power poles shall be removed to a minimum depth of 2’ below finished grade.

Removed power poles shall become the property of the Contractor and shall be properly disposed of offsite.

Subsection 202.11 shall include the following:

Measure Removal of Power Pole by the actual number of power poles removed and disposed of.

Subsection 202.12 shall include the following:

Pay under:

Removal of Power Pole Each

Clean Culvert

Subsection 202.01 shall include the following:

This work consists of cleaning, removing, and disposing of sediment and other debris in the storm drain inlets and culverts at locations shown on the plans.

Subsection 202.10 shall include the following:

Before cleaning operations, remove and store all grates and other appurtenances from the inlet or culvert pipe.

Perform culvert cleaning using a vacuum truck method as approved. Use a high-pressure washer to strip off all soil sediment and other debris accumulated on the structure’s walls. Suction the mix of water and debris out of the structure and into the vacuum truck. Dispose of removed material at a suitable facility located off the project site per applicable regulations and guidelines. The remaining material left in the structure after cleaning shall be removed at the Contractor’s expense. Document and provide in writing the total amount of material removed.

Replace all damaged or missing bolts for the grates and other appurtenances. Upon completing cleaning, treat existing and new bolts required for the grates and other appurtenances with anti-seize compound. Then, reinstall the grate and appurtenances using the treated bolts.

If debris accumulates in clean structures during construction, reclean structures at the Contractor’s expense.

Subsection 202.11 shall include the following:

Measure Clean Culvert by the actual number of existing culvert pipes and inlets that are cleaned and accepted. Cleaning of drainage pipe between inlets, barrier drain holes, and flaps, when required, will not be measured or paid for separately; include it in the work price.

Subsection 202.12 shall include the following:

Pay under:

Clean Culvert Each

Clean Culvert

Payment will consist of full compensation for all labor, materials, and equipment required to clean, maintain, remove, and dispose of sediment and other debris from storm drain inlets and culverts prior to construction.

The amount of anti-seize compound and new bolts required will not be measured and paid for separately; include it in the work price.

The quantity of debris and water disposal will not be measured and paid for separately; include it in the work price.

The amount of water required for pressure washing will not be measured and paid for separately; include it in the work price.

Revision of Section 203 Combination Loader

Revise Section 203 of the Standard Specifications for this project as follows:

Subsection 203.01 shall include the following:

This work consists of furnishing Combination Loaders (including operators) used as directed by the Engineer.

Subsection 203.04 shall include the following:

Combination Loader – Defined as a combination loader with a standard loader bucket, SAE rated for one cubic yard and backhoe up to 1/4 cubic yard; four-wheel industrial, utility, or general-purpose; with loader front and backhoe; in the 75 to 125 horsepower range, either gasoline, diesel engine, or an acceptable equivalent.

Furnish and maintain the combination loader in good operating condition. Do not use equipment if, in the Engineer’s opinion, it is inadequate to produce the required results. Operate all equipment using experienced Operators, approved Apprentices, or approved competent Trainees. Use the equipment as directed by the Engineer.

Subsection 203.12 shall include the following:

Measure the Combination Loader by the number of hours used as ordered. Pay a minimum of four hours for any partial shift unless the piece of equipment is inoperative due to breakdown or other cause determined to be the Contractor's responsibility. Do not measure or pay for the time involved in moving to or from the project under this item.

Time spent moving a combination loader from one location on the project to another, if directed, will be compensated. Time spent moving a combination loader considered idle or for moves made for the Contractor’s convenience will not be compensated.

Do not allow payment for a minimum of four hours when the equipment or operators are assigned to work on other pay items on the project.

Subsection 203.13 shall include the following:

Pay for the accepted quantities at the contract price for each of the pay items listed.

Pay under:

Combination Loader Hour

Revision of Section 210 Reset Structure

Revise Section 210 of the Standard Specifications for this project as follows:

Subsection 210.02 shall include the following:

This work consists of resetting an existing book stand structure as detailed in the plans.

The Contractor shall coordinate with the property owner prior to the removal of the book stand on a suitable reset location. The Contractor shall carefully remove and store the book stand until such time that it can be reset in a permanent location. Any damage to the book stand shall be remedied at the Contractor’s expense to the satisfaction of the property owner.

Subsection 210.12 shall include the following:

The quantity to be measured will be number of structures reset to the satisfaction of the property owner.

Subsection 210.13 shall include the following:

Pay for the accepted quantities at the contract price for each of the pay items listed.

Pay under:

Reset Structure Each

Reset Water Meter

This work consists of resetting water meters, vaults, and associated appurtenances we well as modifying and replacing existing water service lines as detailed in the plans.

The Contractor shall submit detailed work plans, including schedules and methods for resetting the water meter vaults and replacing the service lines. This work plan shall include product data for all materials to be used. The work plans shall be reviewed and approved by the water authority having jurisdiction prior to commencing work.

The water meter reset at 3201 Wadsworth Boulevard shall be coordinated with Consolidated Mutual Water Company. The Contractor shall be familiar with the Consolidated Mutual Water Company standards and specifications for the work. A copy of those standards and specifications can be made available upon request from the water authority.

The water meter resets at 3411/3413 Wadsworth Boulevard, 3415 Wadsworth Boulevard, and 3431/3433 Wadsworth Boulevard shall be coordinated with Wheat Ridge Water District. The Contractor shall be familiar with Wheat Ridge Water District standards and specifications as well as Denver Water Capital Project Construction Standards, 4th Edition. The former can be made available upon request and the latter can be accessed via the link below:

https://www.denverwater.org/contractors/construction-information/design-standards/capital-projects-construction-standards

It is possible the water meter reset and associated service line modifications for 3411/3413 Wadsworth Boulevard will be completed to the location shown in the plans by others prior to construction. Contractor to field verify location of meter and protect in place if water meter reset and service line modifications are complete.

The work shall be approved by the water authority having jurisdiction.

Subsection 210.12 shall include the following:

Resetting water meters shall include all work necessary to remove the meters from their existing location to the new location with acceptance by the respective water authority. This work shall include all removal of existing service lines and installation of new service lines.

https://www.denverwater.org/contractors/construction-information/design-standards/capital-projects-construction-standards https://www.denverwater.org/contractors/construction-information/design-standards/capital-projects-construction-standards

Reset Water Meter

Subsection 210.13 shall include the following:

Pay for the accepted quantities at the contract price for each of the pay items listed.

Pay under:

Pay Item Pay Unit Reset Water Meter Each

Payment will consist of full compensation for all labor, materials, and equipment required to coordinate with the water authority, excavate, relocate / install new meter vaults, remove existing service line pipe, install new service line pipe, and backfill as required to satisfy the water authority having jurisdiction.

Adjust Cleanout

This work consists of adjusting PVC sanitary sewer cleanouts to grade and installing protective frames and lids. The Contractor shall exercise care when performing work within the vicinity of the cleanouts. Any damage shall be repaired by the Contractor at their expense. PVC cleanout pipes and watertight caps shall be adjusted below finished grade. Traffic-rated frames and lids shall be installed above the adjusted cleanout pipes in accordance with manufacturers’ recommendations.

The quantity to be measured will be the number of cleanout pipes adjusted to grade.

The cost of furnishing and installing protective frames and lids are included in the cost of the work.

Subsection 210.13 shall include the following:

Pay for the accepted quantities at the contract price for each of the pay items listed.

Pay under:

Pay Item Pay Unit Adjust Cleanout Each

Payment will consist of full compensation for all labor, materials, and equipment required to adjust the cleanout pipes to grade and install protective frames and lids.

Modify Manhole

Subsection 210.10 shall include the following:

This work consists of modifying manholes as detailed in the plans. Manholes to be modified shall have the eccentric cone or lid rotated and the manhole ring and cover adjusted to finished grade. Prior to performing the modification, the Contractor shall field verify whether or not an eccentric cone or lid is present and if rotation of the eccentric cone or lid would result in the manhole ring and cover being located outside of proposed sidewalk area. If rotation of the cone or lid meets this objective, the Contractor shall proceed with the work. If not, the Contractor shall adjust the ring and cover to finished grade without modifications to the manhole cone or lid.

The quantity to be measured will be the number of manholes modified.

Subsection 210.13 shall include the following:

Pay for the accepted quantities at the contract price for each of the pay items listed.

Pay under:

Pay Item Pay Unit Modify Manhole Each

If, upon field verification, the Contractor discovers rotation of the cone or lid is not possible or does not meet the design intent and adjusts the ring and cover to finished grade, the work will be paid under Adjust Manhole instead.

Revision of Section 212

Landscape Restoration

Revise Section 212 of the Standard Specifications for this project as follows:

Subsection 212.01 shall include the following:

This work under this section consists of furnishing all labor, materials, equipment and services necessary to protect or restore landscaped areas to their pre-project condition at the conclusion of construction.

Landscape restoration shall include protecting, resetting or replacing existing irrigation systems, plants, sod, native seeding, mulch, gravel, landscape rock, boulders, landscape edging, and similar improvements. This work shall include the protection of trees and shrubs, trimming of plants damaged by Contractor's operations, and replacement of seriously damaged vegetation. This work shall include adjusting, extending and repairing irrigation systems (not otherwise identified in the plans to be removed and replaced) to irrigate sod areas and plantings, resetting or replacing irrigation boxes, capping irrigation lines, new sprinkler heads and resetting sprinkler heads. The Contractor is to coordinate with the private property owner prior to commencing ground disturbing activities to coordinate approach of final stabilization and schedule outages. Documentation of the coordination shall be submitted to the Engineer. Material and construction methods shall be in accordance with the applicable specifications.

Subsection 212.08 shall include the following:

Payment will be made under:

Pay Item Pay Unit Landscape Restoration Lump Sum

Payment will consist of full compensation for all labor, materials, and equipment required to restore landscape areas and re-establish irrigation systems.

Temporary irrigation required while irrigation systems are offline will not be paid separately but is included in the cost of the work. If irrigation system shut off during construction results in damage to additional sodded or landscape areas beyond the limits of disturbance, contractor shall replace the sod. This work shall be incidental to the cost of Landscape Restoration.

Revision of Section 213

Rock Mulch (Weed Free)

Revise Section 213 of the Standard Specifications for this project as follows:

Subsection 213.01 shall include the following:

This work consists of furnishing and placing Rock Mulch, certified weed free, in designated landscape areas as shown on the plans or as directed by the Engineer.

Subsection 213.02 shall include the following:

Rock mulch shall consist of Crushed Mountain Granite, naturally colored, angular stone with a minimum diameter of 1½ inches. All material shall be certified weed free, free of organic matter, soil, and other deleterious substances. Rock shall be clean, durable, and resistant to weathering and disintegration. The Contractor shall submit a physical sample of the rock mulch to the City for review and approval prior to use on site.

Subsection 213.03 shall include the following:

Rock mulch shall be placed to a minimum depth of 3 inches after compaction and leveling. The finished surface of the mulch shall be depressed 2 inches below adjacent curbs, sidewalks, and hardscape edges to prevent migration. The Contractor shall ensure that the mulch is evenly distributed and compacted to prevent settling and displacement. Any disturbed or contaminated areas shall be reworked and remulched at the Contractor’s expense.

Subsection 213.04 shall include the following:

The quantity to be measured for Rock Mulch (Weed Free) will be by the square foot installed and accepted.

Subsection 213.05 shall include the following:

Payment will be made under:

Rock Mulch (Weed Free) Square Foot

Revision of Section 214

Landscape Maintenance

Revise Section 214 of the Standard Specifications for this project as follows:

Subsection 214.01 is hereby deleted and replaced with the following:

214.04 Landscape Establishment. From the time of installation, during construction, and throughout the Landscape Establishment period the Contractor shall maintain all plant material and seeded areas in a healthy and vigorous growing condition and ensure the successful establishment of vegetation. This includes performing establishment, replacement work, and landscape maintenance work as described below.

The beginning of the Landscape Establishment period depends upon receipt of the written Notice of Substantial Landscape Completion from the Engineer. Substantial Landscape Completion occurs when all plant materials in the Contract have been planted and all work under Sections 212, 213, 214 and 623 has been performed, except for the Section 214 pay item, Landscape Maintenance. If the Notice of Substantial Landscape Completion is issued during the spring planting season, the Landscape Establishment period begins immediately and lasts for a period of 12 months. If the Notice of Substantial Landscape Completion is issued at any other time, the Landscape Establishment period begins at the start of the next spring planting season and lasts for a period of 12 months.

(a) Establishment and Replacement. After all planting on the project is complete, a plant inspection shall be held including the Contractor and the City of Wheat Ridge to determine acceptability of plant material. During the inspection, an inventory of rejected material will be made, and corrective and necessary cleanup measures will be determined.

Dead, dying, or rejected material shall be removed each month during the Landscape Establishment period as directed. Plant replacement shall be performed during the spring planting seasons at the beginning and end of the Landscape Establishment Period. Plant replacement stock shall be planted per the Contract and is subject to all requirements specified for the original material. Plant replacement shall be at the Contractor’s expense.

(b) Landscape Maintenance. During the Landscape Establishment period the Contractor shall perform landscape maintenance as described. The Contractor shall maintain all landscaped areas in the condition they were in when first installed and accepted.

Before the Notice of Substantial Landscape Completion, the Contractor shall submit a detailed maintenance plan, which includes a schedule showing the number of hours or days personnel will be present, the type of work to be performed, supervision, equipment and supplies to be used, emergency program and responsible person to contact for emergency work, and inspection schedule. The detailed maintenance plan is subject to review and approval by the City. The City will not issue the Notice of Substantial Completion until the Engineer has received and approved the maintenance plan.

The proposed types, brand names, material safety data sheets, and rates of application of herbicides, pesticides, and fertilizers to be used shall be submitted for approval with the detailed maintenance plan. Herbicides, pesticides, and fertilizers shall meet all local, state, and federal regulations and shall be applied by a licensed applicator. The City of Wheat Ridge Parks department will review and approve all proposed materials.

The Contractor shall perform start-up, watering, programming, operation, and fall winterization of the irrigation system. The Contractor shall do a spring start-up of the irrigation system with the City of Wheat Ridge Parks staff before Final Acceptance and perform all irrigation system warranty work as specified in Section 623.

The Contractor shall keep a project diary documenting all landscape and irrigation maintenance activities including work locations and time spent. The Contractor shall provide copies of the diary to the City upon request.

The Contractor shall restore and reseed eroded areas and areas of poor establishment per Sections 212 and 213. The Contractor shall maintain staking and guying until the end of the Landscape Establishment period. The Contractor shall remove all guying wire, straps, and stakes at the end of the Landscape Establishment period.

During the Landscape Establishment period, the Contractor shall water, cultivate, and prune the plants and repair, replace, or readjust guy material, stakes, and posts as required or directed by the City. The Contractor shall reshape plant saucers, repair washouts and gullies, replace lost wood chip mulch, keep all planting sites free from weeds and do other work necessary to maintain the plants in a healthy and vigorous growing condition. This includes seasonal spraying or deep root watering with insecticides or fungicides approved by the City as required.

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(1) Watering in Irrigated Areas. Trees planted at all locations on the project shall be watered once per month at the rate of 30 gallons per tree for the months November through April until the Landscape Establishment period ends. Shrubs planted at all locations on the project shall be watered once per month at the rate of 10 gallons per shrub for the months November through April until the Landscape Establishment period ends.

(2) Watering in Non-irrigated Areas. Trees planted shall be watered twice per month by the Contractor at the rate of 30 gallons per tree per watering for the months May through October, and once per month at the rate of 30 gallons per tree for the months November through April of the 12-month period following planting.

Shrubs planted in upland areas shall be watered twice per month by the Contractor at he rate of 10 gallons per shrub per watering for the months May through October and shall be watered once per month at the rate of 10 gallons per shrub for the months November through April of the 12-month period following planting.

The contract performance bond, required by subsection 103.03, shall guarantee replacement work during the Landscape Establishment period. If all other work is completed on a project, no contract time will be charged during the plant establishment period.

Subsection 214.06 shall include the following:

Payment will be made under:

Landscape Maintenance Lump Sum

Revision of Section 217 Noxious Weed Management

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

Description

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 or near the construction area will be mechanically removed or treated with herbicides. After seeding and near the end of the project, if noxious weed species persist, seeded areas shall receive additional applications of herbicide. There shall be no Colorado Department of Agriculture List-A noxious weeds within the project area upon completion of the project.

Noxious Weed Management

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.

Areas with dense noxious weed populations shall not be used for topsoil salvage.

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

Certified noxious weed-free hay or straw and/or mulch shall be used in all revegetated areas.

Noxious weed treatments shall target observed species and species listed 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.

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.

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 reproduce 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.

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State List1 Recommended Treatments

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.

Puncturevine (Tribulus terrestris)

Summer annual forb with spiny seed capsules (i.e.

goathead).

Common along roadsides.

C Mechanical Control: Hand pull or dig when soil is moist. Bag specimens carefully so as not to scatter seeds.

Herbicide Control: Glyphosate (Roundup) or 2,4 D and Dicamba (Outlaw) applied in spring during early plant growth/emergence. Or, Chorusulfuron (Telar) or Pendimethalin (Pundulum) applied pre-emergence.

Cultural Control: Reseed with native seed mix and prevent bareground.

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.

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State List1 Recommended Treatments

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.

Tree of heaven

(Ailanthus altissima)

Rapidly growing deciduous tree that can grow up to 80’ in height. Leaves are pinnately compound. Spreads by both prolific seed dispersal and aggressive root suckers.

C Mechanical Control: Cutting and mowing alone are not effective and will cause the plant to produce more stump sprouts and root suckers. Mechanical control is only effective in combination with herbicide treatments.

Herbicide Control: Target the roots with systemic herbicides only in mid- to late summer (July through September). Foliar application of glyphosate and triclopyr are the most effective but shall not be used where injury to nearby plantings may occur or within 30 days of planting nearby shrubs and trees.

Basal bark treatments can be effective for stems up to 6 inches and should be used in locations where plantings or desirable vegetation occurs nearby, to avoid injury to those plants. Herbicide treatments are recommended twice per growing season.

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.

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Method of Measurement

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

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:

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

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 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.