44th_and_Tabor_Stamped_Specs.pdf

City of Wheat Ridge 44th Ave & Tabor St August 19, 2026

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COLORADO DEPARTMENT OF TRANSPORTATION

SPECIAL PROVISIONS

WEST 44TH AVENUE AND TABOR STREET

INTERSECTION IMPROVEMENTS

Section / Description Date Page Revision of Section 614 – Pedestrian Push Button Assembly (August 19, 2026) 44 Revision of Section 614 – Fire Preemption System (August 19, 2026) 45 Revision of Section 614 – Intersection Detection System (MIOVISION) (August 19, 2026) 46 Revision of Section 614 – Traffic Signal Poles (August 19, 2026) 47 Revision of Section 614 – Telemetry (Field) (August 19, 2026) 48-51 Revision of Section 627 – Pavement Markings General (August 19, 2026) 52 Revision of Section 630 – Portable Message Sign Panel (August 19, 2026) 53 Revision of Section 630 – Uniformed Traffic Control (August 19, 2026) 54-55 Revision of Section 630 – Traffic Control Plan General (August 19, 2026) 56-62 Force Account Items (August 19, 2026) 63 Utilities (August 19, 2026) 64-67

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COLORADO DEPARTMENT OF TRANSPORTATION

SPECIAL PROVISIONS

WEST 44TH AVENUE AND TABOR STREET

INTERSECTION IMPROVEMENTS

STANDARD SPECIAL PROVISIONS

Name Date # Pages Revision of Section 101 – General Provisions (March 19, 2026) 1 Revision of Section 103 – Colorado Resident Bid Preference (July 1, 2025) 1 Revision of Section 105 – Dispute Resolution, Dispute Review Board and (June 11, 2025) 26 Claims for Unresolved Disputes Revision of Section 107 – Water Quality Control (Under One Acre of Disturbance) (July 1, 2025) 8 Revision of Section 108 – Liquidated Damages (July 1, 2025) 1 Revision of Section 208 – Erosion Control (Under One Acre of Disturbance) (July 1, 2025) 36 Revision of Section 401 – Plant Mix Pavements – General (Subsection 401.17) (July 1, 2025) 4 Revision of Section 412 – Repair of Defective Concrete Pavement (May 28, 2026) 1 Revision of Section 412 – SafetyEdge (September 11, 2025) 1 Revision of Section 601 – Low Strength Evaluation (March 19, 2026) 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 630 – TCS Trainee (March 19, 2026) 2 Affirmative Action Requirements Equal Employment Opportunity (July 1, 2025) 13

NOTICE TO BIDDERS

The proposal guaranty shall be a certified check, cashier’s check or bid bond in the amount of five (5) per cent of the Contractor’s total bid.

For work in excess of $50,000, the City of Wheat Ridge requires payment and performance bonds. The successful Bidder shall submit the Performance Bond and Labor and Material Bond within ten (10) calendar days of receipt of the fully executed agreement.

Pursuant to subsections 102.04 and 102.05, it is recommended that bidders on this project review the work site and plan details with an authorized Department representative. Prospective bidders shall contact the following listed authorized Department representatives at least three (3) working days in advance of the due date for bids.

City of Wheat Ridge Representative: Logan Huffaker LJuffaker@wheatridge.gov Phone: 303-205-7628

Physical Address: 11220 W. 45th Ave.

Wheat Ridge, CO 80033

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

Questions and answers shall be used for reference only and shall not be considered part of the Contract.

COMMENCEMENT AND COMPLETION OF WORK

The Contractor shall commence work under the Contract on or before the 15th day following Contract execution or the 30th day following date of award, whichever comes later, 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 150 calendar days in accordance with the “Notice to Proceed.”

REVISION OF SECTION 101

DEFINITION OF TERMS

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

Subsection 101.02 “Department” shall be replaced by City of Wheat Ridge. “Engineer” and “State” shall be defined as City of Wheat Ridge, acting directly through its duly authorized representative or agent.

Subsection 101.02 shall be replaced with the following:

Holidays recognized by the City of Wheat Ridge are:

New Years Day Dr. Martin Luther King, Jr. Day President’s Day Memorial Day Juneteenth Day Independence Day Labor Day Veteran’s Day Thanksgiving Day Friday after Thanksgiving Day Christmas Day

REVISION OF SECTION 104

SCOPE OF WORK

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

Subsection 104.01 shall include the following:

Construction limits for the project are defined as the following location:

1. West 44th Avenue and Tabor Street

Construction limits include main and cross streets at each location necessary to complete the work, and placement of any signage on any public street, highway, bikeway, sidewalk or alley to be used for construction phasing and construction traffic control purposes. All work shall occur within CDOT or municipal right-of-way. Impacts to existing landscaping, concrete, sidewalk, structures, sprinklers, curbs, gutters, and so on that occur beyond the right-of-way shall be repaired by the Contractor at its own expense. Impacts to existing landscaping, concrete, sidewalk, structures, sprinklers, curbs, gutters and so on that occur within the right-of-way, but are not specifically designated to be removed by the plans or as otherwise directed by the Engineer, shall be repaired by the Contractor at its own expense. Work necessary for the successful prosecution of the work that is not specifically called out on the plans or described in the specifications shall be considered subsidiary to the paid bid items.

REVISION OF SECTION 105

COOPERATION BETWEEN CONTRACTORS

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

Subsection 105.12 shall include the following:

Other construction agencies may be working within or near the project limits. The Contractor for this project shall conduct and coordinate the work with these contractors so as not to interfere with or hinder the progress and completion of the work being performed by other agencies or contractors. The Contractor shall contact all contractors working within the project limits and assign contact personnel between them. The Contractor shall notify the Engineer in writing of these contacts and of what arrangements have been made.

All traffic control conflicts that arise between the needs of the various construction contractors or other agencies shall be brought to the attention of the Engineer. The Engineer shall determine the method of resolution in such instances.

The Contractor shall coordinate all lane closures to ensure that minimum lane requirements are met.

The Department will not recognize claims filed for impact from outside contractor presence due to the Contractor’s failure to coordinate.

All costs subsidiary and incidental to the foregoing requirements shall be included in the original contract prices for the project and will not be paid separately.

REVISION OF SECTION 105

DISPUTE RESOLUTION

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

Subsection 105.22, 105.23, and 105.24 is hereby deleted and shall be replaced with the following:

The Colorado Department of Transportation will not participate in the resolution process for any claims filed by the Contractor.

Contract claims will follow the appropriate procedures of City of Wheat Ridge Standard Specifications.

The following terms of this subsection shall be defined as follows:

Project Engineer shall be Daniel Martinez, or duly authorized representative.

Chief Engineer shall mean the City of Wheat Ridge, Kent Kisselman. or a duly authorized representative.

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REVISION OF SECTION 202

REMOVAL OF STRUCTURES AND OBSTRUCTIONS

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

Subsection 202.01 shall include the following:

After removal, exposed subgrade surface shall be finished to a smooth and uniform surface conforming to the typical approved plan-specified grade.

All references to curb and gutter shall be construed to include concrete curb and gutter, asphalt mat overlying gutter pan, concrete gutter pan, granite-block curb, and stone curb.

This work will include removal and disposal of storm sewer pipe, as required.

Subsection 202.02 shall include the following:

The Contractor shall mark the limits of removals in the field and shall arrange for same to be verified by the Engineer or his or her representative prior to initiating physical removal operation.

Removals shall be completed to the proposed subgrade elevation for the work, or as otherwise designated by the Engineer.

Removed concrete and asphalt material may not be used to construct embankments unless otherwise authorized by the Engineer.

Culverts, pipes, or sewers may not be left in place and filled unless directed to do so by the Engineer.

Storm sewers shall be removed per approved plan details.

Storm drain protection devices shall be installed prior to the commencement of removal activities.

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

The existing asphalt mat, which varies in thickness, 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 disposed of in accordance with all local regulations and ordinances.

Subsection 202.03 is hereby deleted and replaced with the following:

All salvable material shown on the plans shall be removed, without unnecessary damage, in sections or pieces that may be readily transported, and delivered by the Contractor to the location noted in the plans or Project Special Provisions, or as otherwise directed by the Engineer.

The Contractor shall be held responsible for the safekeeping of all salvable materials during the period of the Contract until they are delivered to the City. The Contractor shall make good or replace at its own expense any such materials damaged, stolen or lost prior to receipt by the City. All salvable materials, as designated on the plans, shall remain the property of the City.

REMOVAL OF STRUCTURES AND OBSTRUCTIONS

Subsection 202.07 is hereby deleted and replaced as follows:

All concrete pavements, sidewalks, structures, curbs, gutters, asphalt pavement, etc., designated for removal shall be broken into pieces and recycled, or disposed of outside the limits of the project unless otherwise designated in the plans or as directed by the Engineer.

Old concrete construction which abuts new construction, edges of pavement, sidewalks, curbs, etc., to be left in place shall be saw cut to a true line with a vertical face.

Where old asphalt construction abuts new construction, edges of asphalt pavement, patching, etc., to be left in place shall be wheel cut or saw cut to a neat vertical face with minimal jagged edges to the satisfaction of the Engineer. The Engineer, at his/her discretion, may require asphalt to be saw cut.

Subsection 202.11 shall include the following:

The removal of the existing asphalt mat will be measured by the area in square yards completed to the required depth and accepted. Saw cutting of existing asphalt mat for removal will not be paid for separately but shall be included in the work.

Subsection 202.12 is hereby deleted and replaced as follows:

The accepted quantities will be paid at the contract unit price for each of the pay items listed below that appear in the bid schedule. Payment shall be full compensation for saw-cutting, scraping, sandblasting, removing, hauling, plugging and disposal of such items, excavation and subsequent backfill (with moisture/density control per the revision to Subsection 203.07) to proposed subgrade elevation. The price shall also include salvageable materials removed, their custody, preservation, storage, haul, and disposal.

Payment will be made under:-3-

Pay Item Pay Unit Removal of Pipe Linear Foot Removal of Concrete Median Cover Material Square Yard Removal of Sidewalk Square Yard Removal of Curb and Gutter Linear Foot Removal of Concrete Curb Ramp Square Yard Removal of Concrete Pavement Square Yard Removal of Asphalt Mat Square Yard Removal of Ground Sign Each Removal of Sign Panel Each

REMOVAL OF PAVEMENT MARKINGS

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

In Subsection 202.11, remove the second paragraph and replace with the following:

Removal of pavement marking will not be measured and paid for separately but will be considered included in the unit cost for new pavement markings.

Sandblasting or other surface preparation that may be required to prepare pavement surfaces for the application of new pavement markings will not be measured and paid for separately but will be considered included in the unit cost for new pavement markings.

Painting existing markings black or any other color shall not be considered an acceptable method of removal.

REVISION OF SECTION 203

POTHOLING (SPECIAL)

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

Subsection 203.05(f) Potholing shall include the following:

All potholes must be backfilled using only one of the following methods: 1] Wet Sand; 2] Flow-fill; 3] Flash-fill. The Contractor may submit a written request to use a material not specified above. Squeegee, pea gravel, and native material will not be allowed.

Any pothole in a sidewalk will require a full panel replacement.

Any pothole in the curb and gutter or any drainage way will require at a minimum, a half panel replacement.

In subsection 203.11, paragraph (e), is hereby deleted and replaced as follows:

All related work, including removal of existing pavement, backfilling, shoring, and labor will not be measured and paid for separately, but shall be included in the work. Labor and materials required for surface restoration following potholing activities shall not be measured and paid separately but shall be considered included in the unit cost for this item.

Pay Item Pay Unit Potholing Each

REVISION OF SECTION 203

EXCAVATION AND EMBANKMENT

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

Subsection 203.01 shall include the following:

Fencing shall be erected around all excavations greater than 4 feet deep to preclude public access when unattended.

Subsection 203.04 shall be revised to include the following:

The Contractor shall protect and promptly dewater and recondition all excavations from water, regardless of source.

Approved backfill material shall be Aggregate Base Course (Class 6) or other material as approved by the Engineer.

Subsection 203.12 shall include the following:

Proof rolling, blading, wetting, drying, and dozing, will not be measured and paid for separately, but shall be included in the cost of the work.

Haul and disposal will not be measured and paid for separately but shall be included in the cost of the work.

When the contract does not include pay items for Unclassified Excavation and Embankment Material, these items will not be paid for separately but shall be included in the work.

REVISION OF SECTION 208

SWEEPING

Section 208 of the Standard Specification is hereby revised for this project as follows:

Subsection 208.01 shall include the following:

This work is for sweeping paved surfaces during construction as part of the project Best Management Practices (BMP).

Subsection 208.04 shall include the following:

Paved surfaces adjacent to the construction site shall be swept by the close of business day and during the day as needed when sediment and other materials are tracked or discharged onto them. Sweeping shall be completed with a pickup broom or equipment capable of collecting sediment. Sweeping with a kick broom will not be allowed. Street sweepers using water while sweeping is preferred to minimize dust.

Flushing off paved surfaces with water is prohibited.

Subsection 208.11 shall include the following:

Sweeping, when used as a BMP as shown in the Contract, will be measured by the number of hours that a pickup broom or equipment capable of collecting sediment, authorized by the Engineer, is used to remove sediment from the roadway or other paved surfaces. Each week the Contractor shall submit to the Engineer a statement detailing the type of sweeping equipment used and the number of hours it was used to pick up sediment. Operator will not be measured and paid for separately but shall be included in the work.

Subsection 208.12 shall be modified as follows:

Payment will be made under the Project Force Account for Erosion Control. Payment for Sweeping shall be full compensation for all work necessary to complete this item.

REVISION OF SECTION 208

EROSION CONTROL

Section 208 of the Standard Specification is hereby revised for this project as follows:

Subsection 208.11 shall be removed and replaced with the following:

All cost for performance of the Work to furnish, install, maintain, replace (if not due to contractor negligence), remove, and dispose of BMPs specified in the Contract shall not be paid for separately, but shall be compensated through the Project Force Account for Erosion Control.

All other work required as set forth in Section 208–Erosion Control including all materials, equipment and labor, to permit, set-up, maintain, document, remove and clean-up all erosion control BMP’s as per current City of Wheat Ridge Stormwater Management Plans (SWMP) requirements will not be paid separately; all costs incurred by the Contractor to meet the requirements of this Section regarding Erosion Control unless provide for in the Bid shall be included in the related appurtenance.

The cost for any corrective actions required by the State or City due to the Contractor’s failure to obtain or comply with applicable Permits will be borne by the Contractor, including fines and penalties.

In the case of failures on the part of the Contractor in controlling erosion, sedimentation, and/or water pollution, the City may provide the necessary corrective actions. All corrective action costs, including Project engineering costs, will be the responsibility of the Contractor.

Subsection 208.12 shall be modified as follows:

Payment will be made under the Project Force Account for Erosion Control.

REVISION OF SECTION 209

WATERING AND DUST PALLIATIVES

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

Subsection 209.07, paragraph 1 shall be deleted and replaced with the following:

Water for moisture-density control, landscaping, pre-wetting, and for dust palliatives will not be measured and paid for separately but shall be included in the cost of the work.

Subsection 209.08 shall be deleted.

REVISION OF SECTION 210

RESET GROUND SIGN

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

Subsection 210.07 shall include the following:

Where existing signs are to be removed, the existing sign post foundation shall be removed to a minimum depth of 1’ below finish grade. Removed foundation elements are the property of the Contractor and shall be properly disposed of in accordance with the Standard Specifications, as well as in accordance with applicable laws and ordinances. Contractor shall backfill areas where existing sign post foundations have been removed with clean fill material, flow-fill, or non-shrink grout depending upon location and as directed by the Engineer. Contractor shall restore surface areas disturbed by removal of ground signs. In grass or landscaped locations, Contractor shall reseed backfilled areas as directed by the Engineer. In sidewalks or curb ramps, new sidewalk or curb ramp shall be installed by the Contractor as directed by the Engineer. In cases where existing sidewalk or curb ramp has been damaged, disturbed or otherwise requires restoration, the entire sidewalk panel or curb ramp shall be replaced. Existing sidewalk or curb ramp materials removed by the Contractor during such operations shall be disposed of by the Contractor in accordance with the Standard Specifications, as well as in accordance with applicable laws and ordinances

Existing ground signs constructed to CDOT standards on “P” posts that are to be reset require new foundation(s) in accordance with Standard Drawing S-614-8. Existing ground signs constructed to City of Wheat Ridge standards on square tube posts require new foundation(s) in accordance with City Standards.

All MUTCD requirements specific to horizontal and vertical placement of the reset sign shall be met.

Subsection 210.12 shall include the following:

Reset Ground Sign shall include physical removal of the ground sign and existing foundation to a minimum depth of 1’ below finish grade; disposal of non-salvageable material including removed foundations; backfill of excavated removal areas; and surface restoration of grass, landscaped, sidewalk, curb ramp or on-street areas disturbed by the removal activities. The unit cost shall include all labor and materials required to install new sign post foundations in accordance with the referenced standards, and physical remounting of the ground sign on new foundation(s).

Existing sidewalk or curb ramp materials removed by the Contractor during such operations shall be disposed of by the Contractor in accordance with the Standard Specifications, as well as in accordance with applicable laws and ordinances.

Surface restoration for areas disturbed by ground sign removal shall be considered included in the unit cost for Removal of Ground Sign and will not be measured and paid for separately.

Subsection 210.13 shall include the following:

Reset Ground Sign Each

REVISION OF SECTION 210

ADJUST MANHOLE

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

Subsection 210.01 shall include the following:

This work consists of raising, lowering, or otherwise adjusting the utility manhole on the SE corner of West 44th Avenue and Tabor Street, as shown in the plans, completed and accepted by the Engineer.

Subsection 210.13 shall include the following:

Adjust Manhole Each

REVISION OF SECTION 212

LANDSCAPE RESTORATION

Section 212 of the Standard Specifications is hereby revised for this project as follows:

Subsection 212.01 shall include the following:

Disturbance of existing landscaping shall be minimized wherever possible. The Contractor shall notify the Engineer or Project Manager of any potential disturbance before beginning work.

Landscape restoration shall consist of the repair and/or replacement of all landscape materials that may be damaged through the actions of the Contractor or his agents. This work may include but is not limited to sod, fencing, plantings, sprinkler systems and decorative features as approved by the Engineer.

Subsection 212.07 shall include the following:

Landscape Restoration will be measured and paid in accordance with Force Account 04 Landscape Restoration and as approved by the Engineer.

Subsection 212.08 shall be deleted.

REVISION OF SECTION 403

HOT MIX ASPHALT

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

Subsection 403.03 shall be removed and replaced with the following:

Areas to be patched shall be constructed as shown in the plan and in the City of Wheat Ridge Standard drawing S-E01 HMA, Hot Mix Asphalt and as approved by the Engineer.

Subsection 403.05 shall be deleted and replaced with the following:

The accepted quantities of hot mix asphalt will be paid for in accordance with subsection 401.22, at the contract unit price per ton for the bituminous mixture.

Payment will be made under:

Hot Mix Asphalt (Patching) (Asphalt) Square Yard

Aggregate, asphalt recycling agent, additives, hydrated lime, and all other work necessary to complete each hot mix asphalt item will not be paid for separately, but shall be included in the unit price bid. When the pay item includes the PG binder grade, the asphalt cement will not be measured and paid for separately, but shall be included in the work. When the pay item does not include the PG binder grade, asphalt cement will be measured and paid for in accordance with Section 411. Asphalt cement used in Hot Mix Asphalt (Patching) (Asphalt) will not be measured and paid for separately, but shall be included in the work.

When the pay item does not include the PG binder grade, asphalt cement will be measured and paid for in accordance with Section 411. Asphalt cement used in Hot Mix Asphalt (Patching) will not be measured and paid for separately, but shall be included in the work.

Excavation, preparation, and tack coat of areas to be patched will not be measured and paid for separately, but shall be included in the work.

REVISION OF SECTION 503

CAISSON (SPECIAL)

Section 503 of the Standard Specifications is hereby revised for this project as follows:

Subsection 503.01 shall include the following:

This work consists of installing foundations for new mast-arm style traffic signal-light poles, traffic signal poles with no mast arms, pedestal poles and flashing beacon poles. All individual poles on this project will be owned by the City of Wheat Ridge and installed by the Contractor. Locations of all foundations shall be field-verified and approved by the Engineer prior to excavation.

For each traffic signal-light pole with mast arm, work will occur in three steps: 1] Contractor will install a new foundation for the traffic signal-light pole in accordance with City of Wheat Ridge and CDOT S- Standards; 2] Contractor will install the pole; and 3] Contractor will install the mast arm, luminaire arm and luminaire.

For each pedestal pole and flashing beacon pole, work will occur in three stages: 1] Contractor will install a new foundation for the proposed pole in accordance with City of Wheat Ridge and CDOT S-Standards;

2] Contractor will install the pole; and 3] Contractor will install traffic signal devices.

New Subsection 503.01(a) is hereby included:

Drilling and vacuuming are considered acceptable means of excavation, however, given the location of the project and the anticipated age and density of existing utilities, it is believed that vacuuming may be the preferred construction method for many foundation locations.

Vacuumed Caisson This work consists of constructing traffic signal pole foundations using either a drill or a vacuum method.

Use of a vacuum method in lieu of drilling at these locations shall be to protect existing utilities including but not limited to fiber optic, gas, and underground electric lines. The traffic signal foundation holes will be excavated using a vacuum method in lieu of drilling; and the placing of reinforcing steel and concrete in the excavated holes shall be in accordance with these specifications, City standards, and in conformity with the lines and grades on the plans or established.

New Subsection 503.01(b) is hereby included:

Materials and installation shall conform to the requirements of the City of Wheat Ridge and CDOT S- Standards.

Subsection 503.12 shall include the following:

Vacuumed Caisson Caisson excavation shall be performed with a vacuum pothole machine to prevent drilling through existing utilities.

Section 503.22 is hereby revised to include the following:

Regardless of installation method, foundations for traffic signal-light poles shall be measured and paid by the linear foot of caisson installed and approved as Caisson (Special).

REVISION OF SECTION 503

CAISSON (SPECIAL)

Contractor will furnish and install the poles, therefore base plates, anchor bolts, nuts and nut covers will be furnished and installed by the Contractor.

Items also included in the unit price for the foundation include raking and/or plumbing of the poles after loading, and all required grouting. All required coordination with XCEL Energy to accomplish the work and facilitate scheduling is included in the drilled caisson item and will not be measured and paid separately.

Foundations for traffic signal pedestal poles or push button pedestal poles are considered included in the unit cost for Traffic Signal Pedestal Pole and/or Pedestrian Push Button Post Assembly as appropriate and are not measured and paid separately. Note that each of these cases, vacuuming shall also be considered an acceptable method for foundation installation.

Section 503.23 is hereby revised to include the following:

Caisson (Special) Linear Foot

The unit price for Caisson (Special) shall be full compensation for making all excavations; hauling and disposal of excavated material; performing all necessary pumping; furnishing and placing required concrete and reinforcement steel, including the reinforcement projecting above the tops of the caissons necessary for splicing; all backfilling; removing casings; and for furnishing all tools, labor, equipment, and incidentals necessary to complete the work. No extra payment will be made for casing left in place.

REVISION OF SECTION 601

STRUCTURAL CONCRETE

Section 601 of the Standard Specifications is hereby revised as follows:

Table 601-1, footnote (7) shall be revised to include the following:

When No. 67 or No. 57 coarse aggregate is used as the largest aggregate in the mix, the required air content shall be 4.5% to 7.5%.

Subsection 601.05, Paragraph 5, Item (2), referencing the use of fly ash, shall be deleted.

Subsection 601.06, Item 7, is modified as follows:

(7) Supplier's Mix I.D. number

Subsection 601.07, (d) is deleted. Self-contained mobile mixers will not be allowed.

It is the Contractor’s responsibility to provide Quality Control concrete strength testing and provide test results in a testing frequency, method, and report as per Pre-construction submittal approved by the City Project Manager. Quality Control testing, reports and submittals will not be paid for separately but shall be included in the work.

REVISION OF SECTION 604

WR VALLEY INLET

Section 604 of the Standard Specifications is hereby revised for this project as follows:

Subsection 604.02 shall include the following:

This work consists of furnishing and installing the WR Valley Inlet (Single) in accordance with the lines and grades shown on the plans.

Subsection 604.04 shall include the following:

This work consists of furnishing and installing the WR Valley Inlet (Single) in conformity with the City of Wheat Ridge standard drawing U-D01 1VALY.INLET and in accordance with the lines and grades shown on the plans.

Subsection 604.07 shall include the following:

WR Valley Inlet (Single) will be measured and paid for as Type 13 Inlet, by each inlet installed and approved by the Engineer. All associated labor and materials to complete the installation shall not be paid for separately but shall be included in the item.

Subsection 604.08 shall include the following:

Pay Item Pay Unit Type 13 Inlet (10 Foot) Each

Payment shall be full compensation for labor and materials including, but not limited to, preparation work, reconditioning, forms, grading, bed course, backfill, and finishing as required to complete these items. Excavation to proposed subgrade elevation will not be paid for separately but shall be included in the work.

REVISION OF SECTION 608

CONCRETE SIDEWALK AND CURB RAMP

Section 608 of the Standard Specifications is hereby revised for this project as follows:

Subsection 608.02 shall include the following:

Concrete for sidewalks and curb ramps shall be Class B, and meet the requirements of Section 601.

Subsection 608.03 shall include the following:

Detectable warnings on curb ramps shall be installed in strict accordance with the manufacturer’s recommendations.

In Subsection 608.03(a) delete the third sentence and add the following:

Where excavation to the finished grade elevation results in subgrade of unsuitable soil, the Engineer may designate the unsuitable material to be removed and replaced with Class 6 Aggregate Base Course, or other material approved by the Engineer. Removal of unsuitable material and replacement with Aggregate Base Course Class 6 shall not be paid for separately but shall be included in the work

Subsection 608.03 (f) shall be revised to include the following:

The Contractor shall protect all new concrete items built under this Contract from defacement, or other injury, from any cause. If said damage cannot be adequately repaired to the satisfaction of the Engineer, the Contractor shall remove and replace the unacceptable items at Contractor’s expense.

Subsection 608.06 shall be revised to include the following:

Excavation to proposed subgrade elevation will not be paid for separately but shall be included in the work associated with Section 201, Clearing and Grubbing or Section 202, Removal of Structures and Obstructions.

Detectable warnings on new curb ramps, including all labor and materials necessary for fabrication, transport and installation, will not be measured and paid separately, but shall be considered included in the

Concrete Sidewalk (6 inch) Square Yard Concrete Curb Ramp Square Yard

Payment shall be full compensation for labor and materials including, but not limited to, prep work, reconditioning, forms, grading, bed course, suitable subgrade material including aggregate base course class 6, backfill, curing compound, control and expansion joint, sealant, detectable warnings and finishing as required to complete these items. Excavation to proposed subgrade elevation will not be paid for separately but shall be included in the work associated with Section 202.

REVISION OF SECTION 609

CURB AND GUTTER

Section 609 of the Standard Specifications is hereby revised for this project as follows:

Subsection 609.03(d) shall include the following:

All curb and gutter shall be constructed as shown in the plan and in the City of Wheat Ridge Standard drawing C-D01 VCG Vertical Curb and Gutter (CG) Section and as approved by the Engineer.

For construction of curb and gutter adjacent to existing concrete pavement, the joint pattern shall match that of the concrete pavement. The joint pattern shall be approved by the Engineer prior to construction.

Subsection 609.03(f) shall include the following:

The Contractor shall ensure that new concrete items built under this contract drain properly and, as such there are no areas of standing water on new concrete items.

Subsection 609.03(j) is hereby added as follows:

(j) Protection of New Concrete. The Contractor shall protect all new concrete items built under this Contract against defacement, or other injury, from any cause. If said damage cannot be adequately repaired to the satisfaction of the Engineer, the Contractor shall remove and replace the unacceptable items at Contractor’s expense.

Subsection 609.07 shall include the following:

Curb and Gutter Type 2 (Section II-B) Linear Foot

Payment shall be full compensation for labor and materials including but not limited to, reconditioning, grading, backfill, curing compound, control and expansion joints and sealant as required completing these items.

Excavation to proposed subgrade elevation will not be paid for separately but shall be included in the work associated with Section 202.

REVISION OF SECTION 610

MEDIAN COVER MATERIAL

Section 610 of the Standard Specifications is hereby revised for this project as follows:

Subsection 610.02 shall include the following:

Median Cover Material shall be constructed as shown in the plan and in the City of Wheat Ridge Standard drawing C-G02 Pattern Conc, Pattern Concrete and as approved by the Engineer.

Subsection 610.05 shall include the following:

The accepted quantities will be paid for at the contract unit price for each of the pay items listed below.

Pay Item Pay Unit Median Cover Material (Patterned Concrete) Square Foot

Herbicide if required by the Engineer, will not be measured, and paid for separately but shall be considered included in the work.

REVISION OF SECTION 613

ELECTRICAL CONDUIT

Section 613 of the Standard Specifications is hereby revised for this project as follows:

Subsection 613.01 shall include the following:

This work includes furnishing and installing new High-Density Polyethylene (HDPE) or Polyvinyl Chloride (PVC) electrical conduit for use with and without fiber optic or other signal cables. All materials furnished, assembled, fabricated, or installed under this item shall be new, corrosion resistant, and in accordance with the plans and these Special Provisions.

Subsection 613.02 shall include the following:

All conduits shall be fully compatible with fiber optic cable. Plastic conduit shall be Schedule 80 in the diameters, quantities and depths indicated in the plans and shall be compliant with Bellcore TW-NWT- 000356 requirements. Plastic PVC conduit shall be certified by the manufacturer as meeting ANSI/UL 6 and 651. The manufacturer shall be ISO 9000 compliant.

Subsection 613.07 shall include the following:

Directional boring is the preferred method of conduit installation to avoid impacting existing sidewalks, curbs, gutters, curb ramps, pavement, landscaping and other surface features. Open trenching will only be allowed if specified in the plans or as allowed by the Engineer.

All conduit bends, including factory-installed bends, shall not have a bend radius less than six times the inside diameter of the conduit.

Any excavations required for the installation of conduit shall be performed in such a manner as to avoid unnecessary damage to streets, sidewalks, curbs, landscaping, sprinkler systems and other existing structures or facilities. Excavation shall not be performed until immediately before installation of conduits. All trenches shall be backfilled by the end of a work shift. Material from the excavation shall be placed in a position to not cause damage or obstruction to vehicular or pedestrian traffic or to interfere with surface drainage. Trenches shall be made with a rock wheel or other machine capable of cutting a narrow trench (4”) so as to allow traffic to pass over prior to backfilling. The machine shall be equipped with shields to direct the spoil downward and away from passing vehicles, workers and pedestrians.

If trenching is used, all off-street trenches shall be backfilled with the same material that was removed and shall be compacted and shaped to match the surrounding surface. On-street trenches within all roadway areas shall be backfilled with CDOT-approved Structure Backfill (Flow-Fill) and capped with 9” minimum of Hot Mix Asphalt Pavement (Patching) in accordance with Section 403 and City of Wheat Ridge Standards, as applicable. If the surrounding pavement depth is greater than 9 inches, the HMA (Patching) depth shall match the existing pavement.

The Contractor shall restore all surface materials to their preconstruction condition or better, including but not limited to pavement, sidewalks, curb ramps, sprinkler systems, landscaping, shrubs, sod grass, or native growth vegetation that is disturbed by the conduit installation operation. All such surface restoration shall be considered included in the cost of conduit installation and will not be measured and paid for separately.

ELECTRICAL CONDUIT

Conduit shall always enter a pull box, manhole, cabinet base or any other type structure from the direction of the run only.

All conduit runs that will not have a copper conductor installed shall have a #12 AWG stranded copper conductor placed inside for locating purposes.

All conduit installation shall conform to guidelines of the National Electric Code (NEC).

Each individual conduit shall be equipped with either a pull rope or a pull tape, depending upon the length between pull boxes as follows: 1] each conduit with a segment greater than 400’ between pull boxes shall be equipped with a pull tape in the final product having minimum tensile strength of 1250lbs and of a design and manufacture that prevents cutting or burning into the conduit during cable installation; and 2] each conduit with a length of less than 400’ between pull boxes shall be equipped with a pull rope in the final product having minimum tensile strength of 1250lbs.

The Contractor shall have the option of using pull tape in all conduit installations regardless of length.

Splices in the pull tape, pull rope and tracer wire shall not be permitted. The locating conductor and tape will not be measured and paid separately but shall be included in the unit prices for conduit.

The Contractor shall take all necessary precautions to avoid over-excavating a trench or heaving damage to the existing asphalt or concrete mat, whether caused directly by equipment or by dislodging of rocks or boulders. Any such over-excavation or heaving shall be repaired or replaced at the Contractor’s expense.

The Contractor shall bear the cost of backfilling all over-excavated areas with the appropriate backfill material as approved by the Engineer.

Conduit plugs for sealing conduit shall also be supplied and installed in all open conduit ends as soon as the conduit is installed. Plugs shall be durable, fabricated from no metal parts, be of the split design to allow removal and reinstallation around in-place cables and be easily removal and reusable. Plugs shall be capable of being installed by hand without any tools and shall provide water/air tight seals of at least 100psi and shall cause no damage to the cable when installed.

All conduit bends shall have a minimum acceptable radius – hereby established as 48” for 90o bends and 24” for all other bends. All conduit runs for fiber optic cable shall have a limited number of bends. The sum of the individual conduit bends, both horizontal and vertical, on a single conduit run between any two pull boxes shall not exceed 360o. The preferred limit is 270o. No individual bend shall exceed 90o.

Conduits shall use sweeps to elevate buried conduits to final grade within a pull box or manhole as shown in the plans. Sweeps shall be terminated within pull boxes and manholes to allow for easy installation and removal of conduit plugs. Sweeps shall be set above the ground surface within the pull box at a height that does not interfere with coiling of cables.

At some locations (as illustrated on the plans or in these specifications or as directed by the Engineer or the Engineer’s designee) new conduits may require installation within an existing pull box. At such locations, the Contractor shall carefully excavate around the existing pull box and sweep the new conduit into the pull box in a manner that meets or exceeds the requirements of this Special Provision.

ELECTRICAL CONDUIT

The Contractor shall avoid damaging existing pull boxes. If the existing pull boxes, concrete collars, or lids are cracked or damaged during conduit installation, the Contractor shall be required to replace either or both at no additional cost to the project.

At locations that require conduit to be installed above ground, such as connections to surface-mounted pull boxes, Liquid-Tight Flexible Metal Conduit (LMFC) shall be provided with appropriate fittings and connection hardware. Such conduit shall have a galvanized, high-tensile strength, flexible steel strip inner core (helically wound with sealing cord), and the outer core shall be a UV resistant, liquid-tight smooth PVC sheath that is “keyed” into the inner steel core.

Subsection 613.10 shall include the following:

Electrical Conduit shall be measured by the actual linear foot of conduit installed and accepted and shall include all groundwork, lubricants, anchors, bands, skids, sweeps, pull rope, pull tape, copper tracer wire, adaptors, fittings, conduit plugs, foam sealant, installation equipment, splice couplings, mounting brackets and hardware, structure anchors, adhesives, labor, and all other items necessary to complete the work.

Utility location or potholing for the purposes of conduit installation will not be measured and paid for separately but will be considered included in the unit price for conduit.

Surface restoration shall be considered included in the unit price for this item and will not be measured and paid separately. No separate measurement or payment shall be made for irrigation system or landscape restoration required to be undertaken because of conduit installation. No separate measurement shall be made for any excavation or backfilling.

Subsection 613.11 shall include the following:

All new conduits shall be trenched or directionally bored at the Contractor’s option as allowed by the Engineer. All new roadway crossings shall be directionally bored unless otherwise called out in the plans.

Electrical Conduit unit prices shall be full compensation for the work shown in the plans and described above, complete and in place.

3 Inch Electrical Conduit (Bored) Linear Foot 2 Inch Electrical Conduit (Plastic) Linear Foot 3 Inch Electrical Conduit (Plastic) Linear Foot

WIRING

Subsection 613.01 shall include the following:

This work furnishes and installs electrical wiring for new and modified traffic signals within the project limits. Work also includes replacing any damaged field wires, or wires of insufficient length that are encountered on the project due to controller cabinet or device replacements or resets.

Subsection 613.08 shall include the following:

All new field wiring shall meet current City of Wheat Ridge and CDOT S-Standards. All work required to provide intersection wiring in accordance with National Electric Code (NEC) requirements is considered included in the unit price for this item.

Intersection Wiring Contractor shall establish or re-establish all required wiring and/or wiring connections required for successful operation of the controller and cabinet assembly in accordance with the NEC. This shall include all wiring and/or wiring connections between in-cabinet components as well as those between the cabinet and field equipment including but not limited to signal heads, push buttons, detectors, cameras and emergency vehicle preemption detectors.

Separate feeds shall be provided for traffic signals and street lights.

Conductors shall be permanently identified as to function. Identification shall be placed on each conductor, or each group of conductors comprising a signal phase, in each pull box and near the end of terminated conductors. Identification shall be by bands fastened to conductors in such a manner that they will not move along the conductor.

Grounds and bonding wire, straps and electrodes shall conform to NEC Article 250. Wiring and splices shall conform to applicable NEC Articles. Wiring within cabinets, handholes and junction boxes shall be neatly arranged and shall be laced. Conductors shall be stranded, tinned copper wire, rated at 600 volts and individually insulated with heat stabilized polyethylene. Conductors and cables shall conform to International Municipal Signal Association (IMSA) Specification 19-1.

Metallic cable sheaths, conduit, metal poles and pedestals shall be made mechanically and electrically secure to form a continuous system and shall be effectively grounded. Bonding and grounding jumpers shall be bare copper wire or copper strap of the same cross-sectional area, No. 8 AWG, for all systems.

Sheath for detectors shall be grounded in the controller cabinet only. The other end of the sheath shall be taped and left ungrounded.

A ground electrode shall be installed at each controller cabinet. Each ground electrode shall be a one-piece copper-weld rod of 5/8-inch diameter and eight (8) feet in length, driven to a depth of at least 8 feet below the surface of the ground (flush with ground or top of cabinet base). The ground terminal of each controller shall be connected to the ground rod with a No. 8 AWG bare copper wire with an approved ground rod clamp.

Splices shall be made in hand-holes or cabinets. No splices shall be allowed in pull boxes or conduits.

Method shall be as approved by the City of Wheat Ridge.

WIRING

Bonding of poles and pedestals shall be by means of connecting to the ground rod a bonding strap attached to the anchor bolt or a 3/16-inch or larger brass or bronze bolt installed in the lower portion of the shaft.

Enough signal head conductors shall be provided to perform the functional operation of the signal.

Additional conductors for electrical service or interconnect shall be as noted herein or in the plans. Signal head conductors shall conform to the red-yellow-green color sequencing with different colored tracers for each phase provided. Three (3) spare conductors shall be provided throughout the signal head circuit. All signal head conductors shall have individual terminal lugs for connection to terminal strips in the cabinet.

When conductors and cables are pulled into conduit, ends of said cables and conductors shall be taped to exclude moisture and shall be so kept until splices are made or terminal appliances attached. Ends of spare conductors shall be taped to exclude moisture. Powdered soapstone, talc, or other approved lubricant shall be used in placing conductors in conduit.

A ¼-inch nylon pull rope shall be installed in all new conduits and all existing conduits where a cable is added, or an existing cable is replaced. At least 2 feet of pull rope shall be doubled back into the conduit at each termination.

Five (5) feet of slack shall be left for each conductor at each support pole and 2 feet of slack at each pull box containing cable connections.

Multi-conductor cable shall be spliced and insulated to provide a watertight joint to prevent absorption of moisture by the cable.

All required wiring shall be performed in a neat, workmanlike manner. Wiring shall be routed to match existing cabinet wiring and fixed to existing cabling or the cabinet chassis using wire ties or other approved connectors.

All new wiring shall conform to NEC, IMSA, City of Wheat Ridge and CDOT S-Standards.

Labor and materials to provide traffic signal and flashing beacon wiring on this project in accordance with this Project Special Provision shall be measured and reimbursed on a lump sum basis. No additional reimbursement for wiring shall be made outside of this item.

Wiring Lump Sum

SERVIC…