Federal Boulevard and Amherst Avenue - HAWK Signal.pdf

CITY AND COUNTY OF DENVER

STATE OF COLORADO

DEPARTMENT OF TRANSPORTATION &

INFRASTRUCTURE

Technical Specifications

Contract Number: 202685002

Federal Boulevard and Amherst Avenue – HAWK Signal

June 30, 2026

Federal HAWK City and County of Denver January 16, 2026 Project # PRJ-10004025 AD Submittal CDOT Project # SHO M320-139, 24510

CITY AND COUNTY OF DENVER

DEPARTMENT OF TRANSPORTATION & INFRASTRUCTURE

Federal HAWK – Federal Blvd and Amherst Ave

CCD MASTER PROJECT NO. PRJ-10004025

CDOT SUBACCOUNT: 24510 CDOT PROJECT NO. SHO M320-139

STANDARD CONSTRUCTION SPECIFICATIONS

Standard Construction Specifications for this Project shall be the Colorado Department of Transportation “Standard Specifications for Road and Bridge Construction” adopted in 2025 and as hereinafter modified shall be used for the project.

The following Project Special Provisions take precedence over the Specifications, Plans and supplemental or amended referenced “Standard Specifications for Road and Bridge Construction adopted in 2025 by

CDOT.

The Contractor shall also be familiar with the current editions of the following manuals:

1. Storm Drainage Design and Technical Criteria,

2. Sanitary Sewer Design Technical Criteria Manual,

3. Transportation Design Signal, Sign & Marking Standards,

4. Wastewater Capital Projects Standard Construction Specifications,

5. Denver Water Engineering Standards,

6. Denver Water Capital Project Construction Standards.

DETAILED CONSTRUCTION SPECIFICATIONS

The Detailed Specifications for this project are defined in the City of Denver Contract Requirements and Contract Documents.

STANDARD CONSTRUCTION DETAILS

The Contractor shall be familiar with the most recent editions of the following manuals:

1. CDOT M&S Standards,

2. City and County of Denver’s Transportation Standards and Details,

3. Wastewater Management Standard Detail Drawings,

4. Denver Water’s Capital Projects Standard Drawings, Details contained in the Plans prevail over the CDOT and CCD standard drawings.

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AD Submittal CDOT Project # SHO M320-139, 24510

PROJECT SPECIAL PROVISIONS

The Colorado Department of Transportation’s (CDOT) 2025 Standard Specifications for Road and Bridge Construction control construction of this project. The following Special Provisions supplement or modify the Standard Specifications and take precedence over the Standard Specifications and Plans.

Page No.

Index .................................................................................. (January 16, 2026) 1 Standard Special Provisions ........................................................ (January 16, 2026) 2 Notice to Bidders .................................................................... (January 16, 2026) 3 Commencement and Completion of Work ....................................... (January 16, 2026) 4 Disadvantaged Business Enterprise (DBE) Contract Goal ...................... (January 16, 2026) 5 On the Job Training Contract Goal ............................................... (January 16, 2026) 6 Revision of Section 101 – Definitions and Terms ................................ (January 16, 2026) 7 Revision of Section 102 – Bidding Requirements and Conditions ............. (January 16, 2026) 16 Revision of Section 103 – Award and Execution of Contract................... (January 16, 2026) 17 Revision of Section 104 – Scope of Work ......................................... (January 16, 2026) 18 Revision of Section 105 – Control of Work ....................................... (January 16, 2026) 19 Revision of Section 105 – Cooperation between Contractors .................. (January 16, 2026) 21 Revision of Section 106 – Control of Material .................................... (January 16, 2026) 22 Revision of Section 107 – Legal Relations and Responsibility to Public ...... (January 16, 2026) 23 Revision of Section 107 – Worker Safety ......................................... (January 16, 2026) 24 Revision of Section 108 – Prosecution and Progress ............................ (January 16, 2026) 25 Revision of Section 109 – Measurement and Payment .......................... (January 16, 2026) 26 Revision of Section 201 – Clearing and Grubbing ................................ (January 16, 2026) 27 Revision of Section 202 – Removal of Structures and Obstructions .......... (January 16, 2026) 28 Revision of Section 202 – Removal of Pavement Marking ...................... (January 16, 2026) 29 Revision of Section 202 – Removal of Traffic Signal Equipment .............. (January 16, 2026) 30 Revision of Section 202 – Clean Inlet ............................................. (January 16, 2026) 31 Revision of Section 208 – Erosion Control ....................................... (January 16, 2026) 32 Revision of Section 209 – Watering and Dust Palliatives ....................... (January 16, 2026) 39 Revision of Section 210 – Reset Structures ....................................... (January 16, 2026) 40 Revision of Section 214 – Deciduous Tree (2.5 Inch Caliper) .................. (January 16, 2026) 41 Revision of Section 217 – Herbicide Treatment ................................. (January 16, 2026) 42 Revision of Section 240 – Protection of Migratory Birds Biological Work performed by the Contractor’s Biologist ................................ (January 16, 2026) 43 Revision of Section 250 - Environmental, Health, and Safety Management . (January 16, 2026) 46 Revision of Section 304 – Aggregate Base Course ............................... (January 16, 2026) 48 Revision of Section 403 – Hot Mix Asphalt ........................................ (January 16, 2026) 49 Revision of Section 503 – Drilled Shaft ........................................... (January 16, 2026) 52 Revision of Section 608 – Sidewalks and Bikeways .............................. (January 16, 2026) 53 Revision of Section 609 – Curb and Gutter ....................................... (January 16, 2026) 56 Revision of Section 610 – Median Cover Material ............................... (January 16, 2026) 58 Revision of Section 613 – Electrical Conduit ..................................... (January 16, 2026) 59 Revision of Section 613 – Pull Boxes .............................................. (January 16, 2026) 63 Revision of Section 613 – Wiring ................................................... (January 16, 2026) 64 Revision of Section 613 – Luminaire (LED 6000 Lumens) ....................... (January 16, 2026) 65 Revision of Section 614 – LED Pedestrian Signal Face (LED)(Countdown) ... (January 16, 2026) 66 Revision of Section 614 – Fire Preemption Unit ................................. (January 16, 2026) 68 Revision of Section 614 – Traffic Signal Poles - General ....................... (January 16, 2026) 73 Revision of Section 614 – Telemetry (Field) ..................................... (January 16, 2026) 75 Revision of Section 614 – Traffic Signal Controller (Type 170) ................ (January 16, 2026) 77 Revision of Section 614 – Traffic Signal Uninterrupted Power Supply ........ (January 16, 2026) 84 Revision of Section 614 – Closed Circuit Television ............................. (January 16, 2026) 87 Revision of Section 614 – Ethernet Switch Type II .............................. (January 16, 2026) 91 Revision of Section 625 – Construction Surveying ............................... (January 16, 2026) 95 Revision of Section 626 – Mobilization ............................................ (January 16, 2026) 98

PROJECT SPECIAL PROVISIONS

(CONTINUED)

Revision of Section 626 - Public Information Services .......................... (January 16, 2026) 99 Revision of Section 627 and 714 – Preformed Thermoplastic Pavement Marking (January 16, 2026) 105 Revision of Section 629 – Survey Monumentation ............................... (January 16, 2026) 108 Revision of Section 630 – Construction Zone Traffic Control .................. (January 16, 2026) 110 Revision of Section 630 – Uniformed Traffic Control ........................... (January 16, 2026) 115 Force Account Items ................................................................ (January 16, 2026) 116 Traffic Control Plan – General .................................................... (January 16, 2026) 117 Utilities ............................................................................... (January 16, 2026) 119 Denver (Only) Noise Ordinance Permit Variance Application Template ..... (January 16, 2026) 122

COLORADO DEPARTMENT OF TRANSPORTATION

SPECIAL PROVISIONS

STANDARD SPECIAL PROVISIONS

Name .......................................................................................... Date # of Pages Revision of Section 105 – Project First ................................................... (June 11, 2025) 4 Revision of Section 105 – Dispute Resolution, Dispute Review Board and ........... (June 11, 2025) 24 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 207 – Topsoil .......................................................... (July 1, 2025) 9 Revision of Section 208 – Erosion Control (Under One Acre of Disturbance) ........ (July 1, 2025) 36 Revision of Section 212 – Soil Amendments, Seeding, and Sodding .................. (July 1, 2025) 25 Revision of Section 401 – Plant Mix Pavements – General (Subsection 401.17) ..... (July 1, 2025) 4 Revision of Section 614 - Galvanized Steel Poles ....................................... (July 1, 2025) 1 Revision of Section 627 – Pavement Marking Paint ..................................... (July 1, 2025) 15 Affirmative Action Requirements Equal Employment Opportunity ................... (July 1, 2025) 13 Certified Payroll Requirements for Construction Contracts ........................... (July 1, 2025) 1 Disadvantaged Business Enterprise (DBE) Requirements ............................... (July 1, 2025) 15 Minimum Wages, Colorado, ................................................................ (January 3, 2025) 7

U.S. Department of Labor General Decision Number CO20250009, Highway Construction for Denver and Douglas counties.

On the Job Training ......................................................................... (July 1, 2025) 6 Required Contract Provisions – Federal-Aid Construction Contracts ................. (July 1, 2025) 15

NOTICE TO BIDDERS

It is recommended that bidders on this project review the work site and plan details with an authorized City representative. Prospective bidders shall contact the following listed authorized City representative at least 24 hours in advance of the time they wish to review the project.

Project Manager: Marie Thoming, PE

City and County of Denver Department of Transportation and Infrastructure Marie.Thoming@denvergov.org

ALL questions and bids must be submitted in writing to Marie.Thoming@denvergov.org to receive any information, clarification, or interpretation regarding the plans, specifications, submittal of bids, and any other contract documents or requirements. Only questions answered by formal written Addenda shall be binding. The City will not authorize anyone to orally interpret any of the Contract Documents and any such oral or other interpretations or clarifications shall be without legal effect.

Questions and answers shall be used for reference only and shall not be considered part of the contract unless noted otherwise in the response.

AD Submittal CDOT Project # SHO M320-139, 24510

COMMENCEMENT AND COMPLETION OF WORK

(CALENDAR DAYS)

The Contractor shall complete all work within 180 calendar days in accordance with the “Notice to Proceed.”

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

Subsection 108.03 shall include the following:

The Contractor’s progress schedule may be a Bar Chart Schedule.

Salient features to be shown on the Contractor’s Progress Schedule are:

1. Notice to Proceed

2. Mobilization(s) and Permit(s)

3. Traffic Control

4. Erosion Control

5. Removals

6. Curb and Gutter, Median Cover Material, Curb Ramps

7. Signing and Striping

8. Landscape Restoration

9. De-Mobilization

Marie Thoming Text Box reach substantial completion

Marie Thoming Strikethrough complete all work

DISADVANTAGED BUSINESS ENTERPRISE (DBE) CONTRACT GOAL

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

13% Percent DBE participation.

Marie Thoming Strikethrough 13%

Marie Thoming Text Box 0%

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 On-the-Job Training hours required – 0 hours; OJT is NOT required.

REVISION OF SECTION 101

DEFINITION AND TERMS

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

Definitions used for this project shall include those listed in Title 1 of CCD’s “Standard Specifications for Construction, General Contract Conditions”, 2011 edition, and those identified with the CCD’s Construction Activities Stormwater Manual (CASM).

Subsection 101.01 shall include the following abbreviations:

• BMPs – Best Management Practices

• CASDP – Construction Activities Stormwater Discharge Permit

• CASM – Construction Activities Stormwater Manual

• CCD – City and County of Denver

• DADS – Denver Arapahoe Disposal Site

• DDPHE – Denver Department of Public Health and Environment

• DPR – City and County of Denver Parks and Recreation

• ECS – Erosion Control Supervisor

Revise Subsection 101.02 by deleting and replacing the following definitions for this project as follows:

Contract Modification Order. Change Order in accordance with the City and County of Denver’s General Contract Conditions, Section 1102.

Day. Where the word “day” is used without the reference “calendar” or “working” preceding it, it shall be interpreted as calendar day.

Department. The City and County of Denver, Colorado.

Engineer. The City and County of Denver’s Project Manager, or their designated representative.

Holidays. Holidays observed by the City and County of Denver are:

New Year’s Day Martin Luther King Day President’s Day Cesar Chavez Day Memorial Day Juneteenth Independence Day Labor Day Veteran’s Day Thanksgiving Day Christmas Day

Inspector. The City and County of Denver’s Project Manager, or their designated representative.

Laboratory. The City and County of Denver’s designated laboratory to be designated by the City Project Manager.

Pre-Construction Conference. A meeting of the City project personnel, Contractor project personnel, and other stakeholders held prior to the beginning of construction at which topics pertinent to the successful execution of the work are discussed.

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DEFINITIONS AND TERMS

Project Engineer. The City and County of Denver’s duly authorized representative who is in direct charge of the work and is responsible for the administration and satisfactory completion of the project under contract.

Region Transportation Director. The City and County of Denver’s Project Manager, or their designated representative.

State. City and County of Denver (as applicable) acting through its authorized representative.

State Waters. Any and all surface waters which are contained in or flow in or through this State, not to include waters in sewage systems, waters in treatment works of disposal systems, waters in potable water distribution systems, and all water withdrawn for use until use and treatment have been completed.

Examples of State Waters include, but are not limited to, perennial streams, intermittent or ephemeral gulches and arroyos, ponds, lakes, reservoirs, irrigation canals or ditches, wetlands, stormwater conveyances (when they discharge to a surface water), and groundwater.

Stormwater Management Plan (SWMP). The Stormwater Management Plan contains the requirements necessary to accomplish the following:

The SWMP establishes a minimum standard to construct, install, maintain, and remove required BMPs during the life of the Contract to prevent or minimize pollution of stormwater due to erosion, sediment transport, and construction related pollutant generated during all phases of the project. A SWMP consists of the following elements:

1. CASDP Narrative Worksheet with Narrative Report. The Narrative Report and supporting documents should fully address the methods to be used to prevent sediment, debris, and other pollutants from entering the MS4 and/or State Waters in and around the project area. Proposed structural and non-structural BMPs should be described with sufficient implementation detail to ensure that the logical phases of the proposed construction project meet the performance standards listed in the CASM.

2. Proposed plans and Best Management Practice (BMP) installation details as they apply to the site conforming to the Urban Storm Drainage Criteria Manual, Vol. 3, "Best Management Practices", most current version as issued by the Mile High Flood District (MHFD), or those established by the CCD’s Department of Transportation and Infrastructure. If erosion control plans were included within the bid documents for the project, they shall be used for bid purposes and initial planning/ deployment of BMPs on the project. If provided plans are signed/ sealed by a Professional Engineer, they have been pre-approved by the Permit Authority and may be used without revision for purposes of submitting for CASDP. If provided drawings do not have signature/ seal of Professional Engineer licensed by the State of Colorado, they will require revision by the Contractor with Professional Engineer signature/seal prior to submission to the CCD for CASDP.

3. Supporting documentation related to proposed BMPs that are not currently identified in MHFD Vol. 3 or as otherwise published by CCD.

Any preparation of or adjustments to a SWMP must be performed either by or under the supervision of a Professional Engineer licensed in the State of Colorado. SWMP elements submitted to CCD shall also meet currently established criteria of the CDPHE as the SWMP must meet all local, State and Federal requirements.

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Subcontractor. An individual, firm, corporation, or other legal entity at any tier to whom the Contractor sublets part of the Contract. A subcontractor shall include an individual, firm, corporation, or other legal entity who meets one or both of the following criteria:

(a) Establishes a fabricating process or facility exclusively for the use of the Project, whether on or off the site of work per 29 CFR 5.2 Site of Work (1)(i)(ii)(iii).

(b) Performs work that is incorporated within the Project limits.

Subgrade.

(a) In reference to planting, Subgrade shall be defined as: The surface or elevation of subsoil remaining after excavation is complete, or the top surface of a fill or backfill before planting soil is placed.

(b) In all other cases, Subgrade shall be defined as: The top surface of a roadbed upon which the pavement structure, shoulders, and curbs are constructed; the top surface of soil remaining after excavation is complete; or the top surface of fill or backfill before topsoil is placed. Subgrade that has been treated with lime, fly ash, cement kiln dust, or combinations thereof for stabilization will be considered subbase.

Supplier. An individual, firm, or corporation who meets all of the following criteria:

(a) Sells manufactured materials as a broker, distributor, dealer, manufacturer, or wholesaler who may or may not deliver the materials to the site of work.

(b) The manufacturing of the materials, articles, supplies, or equipment used for the contract that is being supplied shall come from a facility or facilities that:

(1) Is not located on, nor does itself constitute, the project or contract's primary construction site or secondary construction site as defined in 29 CFR 5.2; and

(2) Either was established before opening of bids on the contract, or is not dedicated exclusively, or nearly so, to the performance of the contract.

(c) The supplier’s only obligations for activity on the contract is the delivery of materials, articles, supplies, or equipment, which may include pickup of the same in addition to, but not exclusive of, delivery, and which may also include activities incidental to such delivery and pickup, such as loading, unloading, or waiting for materials to be loaded or unloaded; and

(d) If an entity, in addition to being engaged in the activities specified in paragraph (c) of this definition, also engages in other construction, prosecution, completion, or repair on the site of the work, then this entity is not a supplier but a contractor.

Subsection 101.02 shall include the following:

ANSI. American National Standards Institute. Z60.1 is the national standard for nursery stock.

Backfill. The soil used from original excavation site or the act of placing soil in an excavation.

Balled and Burlapped Stock. Plants dug with firm, natural balls of earth in which they were grown wrapped with burlap, tied, rigidly supported, and drum laced with twine with the root flare visible at the surface of the ball as recommended by ANSI Z60.1.

Bare-Root Stock. Plants with a well-branched, fibrous-root system developed by transplanting or root pruning, with soil or growing medium removed, and with not less than the minimum root spread according to ANSI Z60.1 for type and size of plant required.

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Best Management Practices (BMPs). Schedules of activities, prohibitions of practices, installation of devices, maintenance procedures, and other management practices deployed to stabilize the construction site to prevent or reduce the pollution of State Waters (see definition below).

Stormwater BMPs can be classified as "structural" (i.e., devices installed or constructed on a site) or "non-structural" (procedures, such as modified landscaping practices).

Caliper. Caliper of a trunk as measured by a diameter tape at a height six-inches (6”) above the root flare for trees up to, and including, four-inch (4”) size at this height; and as measured at a height of twelve-inches (12”) above the root flare for trees larger than four-inch (4”) size.

Caliper Inch. The diameter of a tree 6 inches above the root flare. The root flare is where the first main roots attach to the trunk.

Cane. A cane shall be considered a primary stem which starts from the ground or at a point close to the ground at a point not higher than one-fourth (1/4) the height of the plant, and which reaches the minimum height stated in the plant size specification.

Central Leader. Also referred to as leader or the dominant leader. A continuation of the main trunk located in the center of the crown, beginning at the lowest main scaffold branch and extending to the top of the tree. Central leaders should be straight without defects.

Champion Tree. The largest specimen of its species as determined by American Forests measuring guidelines, and as recorded with either the Colorado Tree Coalition, or the National Register of Champion Trees. In the specification herein, Champion Tree(s) shall be referred to as Notable Tree(s).

Circling Root(s). One or more roots whose diameter is greater than ten percent (10%) of the trunk caliper circling more than one-third of the trunk. Circling roots are unacceptable.

Clear Trunk. The portion of the trunk below the main crown which may include shortened temporary branches.

Co-dominant. Two or more vigorous, upright branches or stems of relatively equal diameter that originate from a common point, usually where the leader was lost or removed. Co-dominant stems are unacceptable.

Colorado Department of Health and Environment (CDPHE): State of Colorado, Water Quality Control Division responsible for issuance of State Construction Stormwater Permit.

Construction Activities Stormwater Discharge Permit (CASDP): Permit issued by the City for compliance with City & County of Denver Revised Municipal Code and Department of Transportation and Infrastructure Rules & Regulations concerning the discharge of pollutants in storm generated runoff from construction sites to Municipal Separate Storm Sewer System (MS4, see definition below) or State Waters, via the Municipal Separate Storm Sewer System (MS4).

Construction Activities Stormwater Manual (CASM): City and County of Denver Construction Activities Stormwater Manual (CASM), 2010 edition.

Container-Grown. Healthy, vigorous, well-rooted plants grown in a container, with a well-established root system reaching sides of container and maintaining a firm ball when removed from container.

Container shall be rigid enough to hold ball shape and protect root mass during shipping and be sized according to ANSI Z60.1 for type and size of plant required.

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Crown. The portion of a tree beginning at the lowest main scaffold branch extending to the top of the tree. On younger trees, the crown may be comprised of temporary branches.

Cultivar. A named plant selection from which identical or nearly identical plant characteristics can be produced, usually by vegetative propagation or cloning.

Denver Arapahoe Disposal Site (DADS): City and County of Denver disposal site.

Diameter Breast Height (DBH). Diameter of a trunk as measured by a diameter tape at a height 54-inches (54”) above the ground line for trees with caliper of 6 inches or greater as measured at a height of 12 inches above the root flare. Per ANSI Z60 American Standard for Nursery Stock.

Drip Zone / Drip Line. The outermost edge of the tree’s canopy or branch spread. The area within a tree’s drip line is all the ground under the total branch spread.

Duff Layer. The surface layer of native topsoil that is composed of mostly decayed leaves, twigs, and detritus.

Established Tree. Trees on public property in fair or better condition with a trunk six inches (6”) in diameter or greater.

Erosion Control Supervisor (ECS). The Erosion Control Supervisor is assigned by the Contractor to perform duties as described in this Section. The ECS shall be properly trained in BMPs per requirements of subsection 208.03(c) and shall be under the direction of a Professional Engineer licensed in the State of Colorado when performing any modifications to the project Stormwater Management Plan (SWMP), as required by CDPHE.

Exploratory Excavation. A method approved by the Office of the City Forester to determine the amount and size of tree roots under the surface. Methods may include hand excavation, a pneumatic air excavation tool, or water excavation.

Fertilizer. A substance that is added to soil to help the growth of plants.

Finish Grade. Elevation of finished surface of planting soil.

Final Stabilization. Point of construction when all ground surface disturbing activities at the site have been completed and uniform vegetative cover has reached 70% of pre-disturbance vegetative cover (as judged by comparison to nearest fallow vegetation), or equivalent permanent features have been employed. At this point, all temporary BMPs can be removed, all construction and equipment maintenance wastes have been disposed of properly; and all elements of the Stormwater Management Plan have been completed.

Genus. Biological classification name for a group of related plants that share similar characteristics or features.

Growing Media. Soil with properties suitable for plant growth.

Impacted by Construction. Trees that are directly within or adjacent to the limit of work, within or adjacent to staging/storage areas, and within or adjacent to construction access areas that are affected in a negative way.

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Included Bark. Bark embedded in the union between a branch and the trunk or between two or more stems that prevents the formation of a normal branch bark ridge. Included bark is unacceptable.

Invasive Tree Species. Species that are on the Colorado State List for Noxious Weed Species. Anything on the A, B, or C list needs to be evaluated by the Office of the City Forester for suitability.

Kinked Root. A main root that is sharply bent. Kinked roots are unacceptable.

Licensed, and Insured Arborist. A person shall be licensed and insured by the City and County of Denver per the City Ordinance, Chapter 57.71 to cut, trim, prune, or remove trees.

Major SWMP Modification. Changes to the original SWMP that removes or adds additional area to the project or modifies the hydrology or drainage of the project. A Major SWMP Modification requires the submission of revised Stormwater Management Plan (SWMP) elements to the Permit Authority for review and approval. Any adjustments to a SWMP must be performed either by or under the direction of a Professional Engineer licensed in the State of Colorado.

Minor SWMP Modification. Modification to the SWMP that does NOT increase the scope or change hydrology of the project but: modifies/improves specific BMPs in use at site, indicates progression in phasing of the project, or specifies relocation of previously approved BMPs within the project. Any adjustments to a SWMP must be performed either by or under the direction of a Professional Engineer licensed in the State of Colorado.

Municipal Separate Storm Sewer System (MS4). A conveyance or system of conveyances (including roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, man-made channels, or storm drains):

1. owned or operated by a State, city, town, county, district, association, or other public body (created by or pursuant to State law) having jurisdiction over disposal of stormwater or other wastes, including special districts under State law such as a sewer district, flood control district or drainage district, or similar entity, or a designated and approved management agency under Section 208 of the Federal Clean Water Act that discharges to State Waters.

2. designed or used for collecting or conveying stormwater.

3. which is not a combined sewer; and

4. which is not part of a Publicly Owned Treatment Works (POTW).

Notable Tree. Trees on public property of species rare to the City and County of Denver, including but not limited to size, form, shape, beauty, age, color, rarity, genetic constitution, or other distinctive features; of the earliest known plantings; associated with a historic person, place, event, or period;

associated with local folklore, myth, legends, or traditions; and of large diameter, height or canopy spread. In the specification herein, Notable Tree(s) will be used to describe both Champion Tree(s), and Tribute Tree(s).

Office of the City Forester (OCF). The City division within Denver Parks and Recreation responsible for all trees in public parks, parkways, right-of-way, and other public property.

Pesticide. A substance or mixture intended for preventing, destroying, repelling, or mitigating a pest.

This includes insecticides, miticides, herbicides, fungicides, rodenticides, and molluscicides. It also includes substances or mixtures intended for use as a plant regulator, defoliant, or desiccant.

Pests. Living organisms that occur where they are not desired or that cause damage to plants, animals, or people. Pests include insects, mites, grubs, mollusks (snails and slugs), rodents (gophers, moles, and mice), unwanted plants (weeds), fungi, bacteria, and viruses.

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Permit Authority. The Department authorized by CCD to review and process CASDP Applications for Capital and/ or governmental sponsored projects. The responsible CCD department serving as the Permit Authority is the Engineering, Regulatory and Analytics Office. As a clarification, the Development Services Department of the CCD serves as the point of intake and permit processing center.

Permit Enforcement Authority. The Department authorized by CCD to inspect and enforce CASDP Rules and Conditions for all construction projects within the City’s MS4 Boundary. The responsible CCD department serving as the Permit Enforcement Authority is the Wastewater Management Division of the Department of Transportation and Infrastructure.

Planting Area. Areas to be planted.

Planting Soil. Standardized topsoil; existing, native surface topsoil; existing, in-place surface soil;

imported topsoil; or manufactured topsoil that is modified with soil amendments, soil conditioners and fertilizers to produce a soil mixture best for plant growth.

Pneumatic Air Excavation Tool. A tool specifically designed to excavate soil from around tree roots. Air Spade or Air Knife are examples of pneumatic air excavation tools.

Project Consulting Arborist. An independent consultant with a degree in forestry, horticulture, arboriculture, plant pathology, entomology or plant biology; an American Society of Consulting Arborists (ASCA) registered consulting arborist, or an International Society of Arboriculture (ISA) Board Certified Arborist, with at least five (5) years of field experience, including tree preservation or on-site monitoring of public works or construction projects involving tree retention and protection. The Project Consulting Arborist shall be approved by the Office of the City Forester.

Project Manager. The CCD Project Manager, or their designated representative.

Root Ball. Root mass of a tree or shrub after digging or removal of the container. Depth is measured from the base of the root flare to the bottom of the root ball. Width is measured horizontally across the root ball with an approximately circular form or the least dimension for non-round root balls, centered around the trunk within a 10% Root tolerance according to ANSI Z60.1

Root Collar. Also referred to as the root flare. The transition zone where the trunk and root zone meet.

Root Flare. Also called “trunk flare”. The area at the base of the tree's stem or trunk where the stem or trunk broadens to form first order roots; the area of transition between the root system and the stem or trunk.

Scaffold Branches. Large main branches originating from the trunk that form the main structure of the crown.

Significant Tree. Trees on public property with a trunk twelve inches (12”) in diameter at breast height (DBH) or greater or designated by the Office of the City Forester.

Soil Amendment. Any substance which is intended to improve the physical, chemical, or other characteristics of the soil.

Soil Conditioning. Includes, but is not limited to, any soil amendment such as fertilizer, humate, mycorrhizae, and compost.

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Species. Biological classification name for a subgroup of plants within a genus.

State Construction Stormwater Permit. Colorado Revised Statutes require that all construction sites/development projects, which, by definition, disturb one or more acres in area, shall be covered by a State issued general permit for construction activities. Information on the application requirements for the State permit can be obtained by phone at 303-692-3500; or by visiting their offices located at 4300 Cherry Creek Drive South, Denver, CO 80246. or on the Web at: https://cdphe.colorado.gov/water-quality-permits.

State of Colorado. City and County of Denver (as applicable) acting through its authorized representative.

Stem-girdling Root. A circling, bent, or straight root that touches or rests on the trunk or root flare that can become a permanent root. Stem-girdling roots are unacceptable.

Subsoil. All soil beneath the topsoil layer of the soil profile and typified by the lack of organic matter and soil organisms.

Substantial Completion of Erosion Control. The point of construction when permanent BMPs have been installed, initial growth is in place, and the site is waiting for vegetative cover to reach 70% of pre-disturbance vegetative cover.

Suitability. The quality of a tree or trees appropriate for protection and preservation during construction projects. This quality is based on an assessment of tree health, structure, age, species factor and risk assessment, if pertinent.

Surface Soil. Soil that is present at the top layer of the existing soil profile at the project site. In undisturbed areas, the surface soil is typically topsoil; but in disturbed areas such as urban environments, the surface soil can be subsoil.

Taper. The thickening of a trunk to the root flare or branch toward its parent base.

Temporary Branch. A small branch that is temporarily retained along the lower trunk of young trees to promote general health and trunk taper.

Tree Protection Work Plan. The tree protection plan is a plan based on the contract drawings that includes the Contractor’s approach to working within and around the Tree Protection Zones.

Tree Protection Zone (TPZ). The Tree Protection Zone is the area above and below grade around each tree where construction activities are limited or restricted to preserve tree health and structural integrity of the protected trees.

a) The diameter of the tree shall be measured at four and one-half feet (4.5’) above grade (referred to as diameter breast height). For every-one inch (1”) of tree diameter the Tree Protection Zone shall extend one foot (1.0’) radially from the base of the trunk or be placed at the dripline, whichever is greater.

b) Notable Tree protection shall be for every one inch (1”) of tree diameter the Tree Protection Zone shall extend one- and one-half feet (1.5’) radially from the base of the trunk, or as determined by the Office of the City Forester and include chain link fencing.

c) For areas with groups or groupings of trees, if the distance between trees is less than thirty feet (30’), the Tree Protection Zone may be combined and treated as one contiguous area to create a more clearly defined and manageable Tree Protection Zone.

AD Submittal CDOT Project # SHO M320-139, 24510

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Tribute Tree. A living dedication for an occasion like a birth, wedding, anniversary, or to remember someone close to you. In the specification herein, Tribute Tree(s) shall be referred to as Notable Tree(s).

Trunk. The main stem of a tree, beginning at the root collar and ending at the lowest main scaffold branch.

Unsuitable Materials. Unsuitable materials refers to organic, rock and other unsuitable soil materials that cannot be compacted to 95% of Standard Proctor Density (AASHTO T-99), at optimum moisture +/- 2% for clay soils and 95% of Standard Proctor Density (AASHTO T-180), at optimum moisture +/- 2% for granular soils.

Variety. A naturally occurring named plant selection subtype of a species.

Water Excavation. Hydrovac excavation that utilizes high-pressure water to cut and liquefy the soil, while simultaneously using a vacuum to remove the soil from the excavation and will require that import fill is brought to the site to fill trenches after excavation.

Weeds. Including but not limited to Puncturvine, Field Bindweed, Dandelion, Jimsonweed, Diffuse, Spotted and Russian Knapweed, Quackgrass, Horsetail, Rush Grass, Mustard, Lambsquarter, Chickweed, Cress, Crabgrass, Canada Thistle, Nutgrass, Blackberry, Tansy Ragwort, Bermuda Grass, Johnsongrass, Poison Ivy, Nut Sedge, Nimble Weed, Bent Grass, Barnyard Grass, Perennial Sorrel, Cheatgrass, Kochia, Prickly Lettuce, Feral Rye, and Brome Grass or any weed listed on Colorado Noxious Weed List and Watch List.

AD Submittal CDOT Project # SHO M320-139, 24510

REVISION OF SECTION 102

BIDDING REQUIREMENTS AND CONDITIONS

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

Replace Subsection 102.05 with the following:

102.05 Examination of Plans, Specifications, Special Provisions, and Site of Work. The Bidder is expected to examine the side of the proposed work, the proposal, plans, specifications, supplemental specifications, special provisions, and contract forms, before submitting a proposal. The submission of proposal will be considered conclusive evidence that the bidder has made this examination and is aware of the conditions to be encountered in performing the work according to the Contract.

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

Additionally, the following project documents are electronically available as supplementary information for this project.

(1) “Standard Specifications for Construction General Contract Conditions.” Prepared by the City and County of Denver, 2011 Edition.

(2) “Regulated Asbestos Contaminated Soil Standard Operation Procedure.” Prepared by the Denver Department of Public Health and Environment, Environmental Quality Division, dated May 2, 2019.

(3) “Clarification on Guidance for Reuse of Soil on City Projects.” Prepared by the Denver Department of Health and Environment, Environmental Quality Division, dated May 8, 2019.

(4) “Pre-Dig Checklist for Contractors.”

(5) “Urban Storm Drainage Criteria Manual, Volume 3, Best Management Practices.” Prepared by the Mile High Flood District, date November 2010.

After the proposals have been opened, the low responsible bidder may obtain electronic plans and special provisions from the City and County of Denver Business Management System (B2Gnow) website. Also, if they are available for the project, the low responsible bidder may also obtain cross sections, major structure plan sheets, and computer output data. Survey information is available and can be provided by City and County of Denver Engineer.

AD Submittal CDOT Project # SHO M320-139, 24510

REVISION OF SECTION 103

AWARD AND EXECUTION OF CONTRACT

Revise Section 103 of the Standard Specifications for this project as follows:

Subsection 103.03 shall include the following:

The payment bond shall be a guarantee that all those performing labor or furnishing materials, supplies, rental items, tools, and equipment for the performance of the Work under the Contract shall be paid.

The performance bond shall also be a guarantee for the repair or replacement of all Work found to be defective or otherwise unacceptable for the term of the Contract.

Subsection 103.04 is hereby deleted.

AD Submittal CDOT Project # SHO M320-139, 24510

REVISION OF SECTION 104

SCOPE OF WORK

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

All subsections except for 104.01, 104.05, and 104.07 are hereby deleted.

Subsection 104.01 shall include the following:

The “construction limits” for the Site are defined as follows:

(a) intersection of Federal Boulevard and Amherst Avenue

Construction limits include intersections as necessary to complete the Work, and placement of signage on streets and sidewalks to be used for construction detours on the Contract Drawings.

All Work shall occur within the City and County of Denver Right-of-Way or obtained easements.

Impacts to existing landscaping, concrete, sidewalk, structures, sprinklers, curbs, gutters, etc.

that occur beyond the Right-of-Way, shall be repaired by the Contractor at their own expense.

Impacts to existing landscaping, concrete, sidewalk, structures, sprinklers, curbs, gutters, etc.

that occur within the Right-of-Way, but are not specifically designated to be removed by the Contract Drawings or by the Engineer, shall be repaired by the Contractor at their own expense.

AD Submittal CDOT Project # SHO M320-139, 24510

REVISION OF SECTION 105

CONTROL OF WORK

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

Subsection 105.02 shall include the following:

All certifications and test reports for all applicable submittals shall conform to sections 106.12 and 106.13.

AD Submittal CDOT Project # SHO M320-139, 24510

REVISION OF SECTION 105

CONTROL OF WORK

Subsection 105.12 shall include the following:

Other construction contractors may be working in the vicinity of the project, including the CCD Federal Blvd. Medians 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.

Revise Paragraphs 4, 5 and 6 of Subsection 105.20 as follows:

If damage occurs to an existing structure through improper maintenance per 105.19, the Contractor shall submit a repair procedure to the Engineer to repair the defect(s).

The repair categories and requirements are defined as follows:

a) “In-kind” repairs. In-kind repairs are repairs where the As-Built or Advertised plans are utilized to replace or repair damaged components with identical dimensions and materials used plans and where no plan modifications are made. In-kind repair procedures shall be reviewed and accepted by the Engineer before any repair. The use of approved repair grouts or doweled reinforcing with epoxy adhesive is permitted in in-kind repairs. Doweled reinforcing shall meet or exceed the strength requirements of the original design.

b) “Modified repairs”. Modified repairs are those which deviate in dimensions and/or materials from the As-Built or Advertised plans or where plans are not available. Modified repair procedure submittals shall include calculations, independent design calculations, shop drawings, and/or working drawings per 105.02, and any other applicable section of the specifications for the needed repair. The Contractor’s Engineer shall electronically seal Modified repair submittals.

Damage to new structures or modified structures, shall be repaired per the contract documents.

The Engineer of Record shall be notified and review all corresponding submittals before any repairs.

REVISION OF SECTION 105

COOPERATION BETWEEN CONTRACTORS

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

Subsection 105.10 shall include the following:

Other construction agencies may be working in the vicinity of the project, including the Federal Blvd. Medians 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 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.

AD Submittal CDOT Project # SHO M320-139, 24510

REVISION OF SECTION 106

CONTROL OF MATERIAL

Revise Section 106 of the Standard Specifications for this project as follows: Delete and replace subsection 106.01 with the following:

106.01 Source of Supply and Quality Requirements. All materials used shall meet all quality requirements of the Contract. The Contractor shall comply with the requirements of the special notice to contractors contained in the Department’s Field Materials Manual, including notifying the Engineer of the proposed sources of materials at least two weeks before delivery.

When alternative materials are permitted for an item in the Contract, the Contractor shall state at the Pre-construction Conference the material that will be furnished for that item. Reference in the Contract to a particular product or to the product of a specific manufacturer, followed by the phrase “or approved equal”, is intended only to establish a standard of quality, durability, and design, and shall not be construed as limiting competition. Products of other manufacturers will be acceptable provided such products are equal to that specified.

All rental equipment companies and all entities who meet the Supplier definition, as outlined in 101.02, in which the written agreement exceeds $10,000, shall have the following requirements for the Contract:

(a) Rental equipment companies and Suppliers shall create an account in the B2GNow software system.

(b) The Contractor shall submit a completed Form 1425 in the B2GNow software system at such time that the $10,000 amount is known to be exceeded and/or before the following occurs on the Contract:

• the Supplier’s upper tier begins work, or

• rental equipment is being used, or

• incorporating materials into the Contract

Failure to comply with the requirements of this subsection shall be grounds for withholding of progress payments.

The sixth sentence of Subsection 106.08 is replaced with the following:

Stored materials will be paid in accordance with Title 9, GC 906 of the City’s Standard

Specifications for Construction General Contract Conditions, 2011 Edition.

AD Submittal CDOT Project # SHO M320-139, 24510

REVISION OF SECTION 107

LEGAL RELATIONS AND RESPONSIBILITY TO PUBLIC

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

Subsections 107.07 – 107.08, 107.11, 107.13-107.14, and 107.16-107.18 are hereby deleted.

AD Submittal CDOT Project # SHO M320-139, 24510

REVISION OF SECTION 107

WORKER SAFETY

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

Subsection 107.06 shall include the following:

Contractors shall comply with the CCD Noise Control Ordinance for all construction activities scheduled to occur between the hours of 9:00 p.m. and 7:00 a.m. Monday – Friday and 5:00 p.m. and 8:00 a.m. Saturday through Sunday if noise levels are expected to exceed 50 dB(A) in residential areas or 60 dB(A) in commercial areas.