10204 EXHIBIT B - Project and Standard Special Provisions.pdf

PROJECT AND STANDARD SPECIAL

PROVISIONS

Mountain Vista Drive and Timberline Road Culvert Replacement

Bid No. 10204

Prepared for:

281 North College Avenue Fort Collins, CO 80522-0580

(970) 221-6605

Prepared by:

Benesch

7979 E Tufts Ave. Suite 800 Denver, CO 80237

August 2025

EXHIBIT B

City of Ft Collins August Mountain Vista Drive and Timberline Road Culvert Replacement Bid Number: 10204

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

PROJECT SPECIAL PROVISIONS

Name Date Page No.

Project Special Provisions Index 1

Standard Special Provision Index 2

Notice to Bidders 3 Commencement and Completion of Work 4 General Information 5 Revision of Section 101 Definitions and Terms 6 Revision of Section 102 Project Plans and Other Data 7 Revision of Section 105 Control of Work 8-9 Revision of Section 107 Performance of Safety Critical Work 10 Revision of Section 107 Protection of Existing Vegetation 11 Revision of Section 108 Prosecution and Progress 12-16 Revision of Section 201 Clearing and Grubbing 17 Revision of Section 202 Removal of Pipe (Waterline) 18 Revision of Section 202 Removal of Asphalt Mat 19 Revision of Section 203 Excavation and Embankment 20 Revision of Section 206 Structure Backfill (Special) 21 Revision of Section 209 Dust Palliatives 22 Revision of Section 211 Dewatering 23 Revision of Section 403 Hot Mix Asphalt 24-26 Revision of Section 506 Grouted Riprap 27 Revision of Section 509 Provide Temporary Support 28 Revision of Section 619 Water Lines 29 Force Account Items 30 Traffic Control Plan – General 31-33 Utilities 34-39

Appendix A – PRPA Pipe Support Example Appendix B – ELCO Construction Specifications

Bid Number: 10204

No.

Name Date of Pages

Revision of Section 105 Dispute Resolution, Dispute Review Board and (June 11, 2025) 24 Claims for Unresolved Disputes

Revision of Section 207 Topsoil (July 1, 2025) 1 Revision of Section 212 Soil Amendments, Seeding, and Sodding (July 1, 2025) 1 Revision of Section 401 Plant Mix Pavements – General (Subsection 401.17) (July 1, 2025) 1

NOTICE TO BIDDERS

The proposal guaranty shall be a certified check, cashier’s check, or bid bond in the amount of 5% of the Contractor’s total bid. A payment and performance bond on the part of the contractor for 100% of the contracted amount is required.

The cost of the bond must be included in the proposed price.

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 City representative. Prospective bidders shall contact one of the following listed authorized Department representatives at least 12 hours in advance of the time they wish to go over the project.

City of Fort Collins Jin Wang Office Phone (970) 416-2292

City of Fort Collins, Purchasing Adam Hill Office Phone (970) 221-6777

The above referenced 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.

Where reference is made in the plans and specifications to Owner, Department, Chief Engineer, Resident Engineer, Project Engineer, Engineer, and Inspection and Testing Agency it is understood to mean the City of Fort Collins, Colorado, representative.

Bidders must be listed on the current Colorado Department of Transportation’s qualifications list to qualify.

Contractor hereby proposes to furnish all labor, machinery, equipment, materials (except onsite materials to be repurposed or materials provided by the City) and supplies, and to sustain all the expenses incurred in doing the work per the proposal schedule, and in pursuance of a certain advertisement of the City of Fort Collins, of the State of Colorado, and in accordance with the full details, Plans, and Specifications as prescribed by said City Engineer. The Colorado Department of Transportation’s Standard Specifications for Road and Bridge Construction (2025), and as revised by the special provisions, shall be used to control work on this project. The items of work and the unit prices contained in the Proposal Schedule are described in and are a part of the Standard Specifications and are to be the method of measurement of the project quantities and the basis of payment.

COMMENCEMENT AND COMPLETION OF WORK

The Contractor shall commence work under the Contract by the City in the “Notice to Proceed”. The Contractor shall have 180 calendar days from the “Notice to Proceed” for substantial completion of all tasks.

All work in the channel, including the box culvert, final grading and seeding, and all other work necessary for the conveyance of the No. 8 Ditch shall take place between November 1 and April 1. Liquidated damages are $25,000 per day for work not completed that may impede the flow of water in the ditch.

Substantial completion is defined as the completion of construction of all major features in the contract plans. The Contractor shall have 14 calendar days from substantial completion for final completion, including all punch list items and demobilization. Liquidated damages are $2,500 per day for final completion.

The Contractor will be permitted to perform work between 7:00 AM and 7:00 PM, Monday through Friday.

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:

• Mobilization

• Detour

• Removals

• Roadway Earthwork

• Erosion Control

• Structure Construction

• Hot Mix Asphalt Paving

• Seeding & Mulching

GENERAL INFORMATION

1. The Colorado Department of Transportation "Standard Specifications for Road and Bridge Construction", 2025 (hereafter referred to as the "Standard Specifications") are made a part of this Contract by this reference, except as revised herein, and are hereby adopted as the minimum Standard Specifications of Compliance for this project. In those instances where the Standard Specifications conflict with any of the provisions of the preceding, the preceding Sections shall govern.

2. The Contractor shall have a copy of the Colorado Department of Transportation "Standard Specifications for Road and Bridge Construction", 2025 on the project site at all times.

3. The Contractor is responsible for obtaining a CDPS-SCP (Colorado Discharge Permit System - Stormwater Construction Permit) from the CDPHE (Colorado Department of Public Health) prior to construction.

4. If dewatering is required the Contractor is responsible for obtaining the required permits.

5. The Contractor is responsible to obtain any additional permits, license and/or certification required by

City or State agencies required to complete the work included in the Contract Documents.

6. The Contractor is responsible for determining access locations, staging areas, and refueling areas in accordance with Special Contact Provisions for Items 208 Erosion Control and 626 Mobilization for permit applications to perform the work.

7. The contractor is responsible for preparation of redline As-Built drawings. As-Built drawings will provide documentation of all as-built conditions at a level of detail and accuracy to the satisfaction of the Project Engineer. The As-Built drawings shall be provided to the City within 30 days of completion of the project.

8. The contractor shall provide a minimum of 48 hours’ notice to the Project Engineer for onsite materials testing.

9. The contractor and subcontractors shall have the name of their company displayed and clearly visible on all vehicles. Contractor and subcontractors shall obey all speed signs, speeding through detour routes neighborhoods, and project limits will not be tolerated.

REVISION OF SECTION 101

DEFINITION AND TERMS

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

Technical Specifications related to construction materials and methods for the Work embraced under this Contract shall consist of the “Colorado Department of Transportation, Standard Specifications for Road and Bridge Construction” dated 2025, along with the Larimer County Urban Area Street Standards and the City of Fort Collins Utility Standards. If there is a conflict apparent between the two, the more stringent specification shall be used.

Certain terms utilized in the Specifications referred to in the paragraph above shall be interpreted to have different meanings within the scope of the Contract. A summary of redefinitions follows:

The terms Project Engineer and Project Manager shall be interchangeable in this contract.

Revise the definitions in Section 101.02 as follows:

a. Department. City of Fort Collins Engineering Department, Colorado

b. Engineer. The Construction Engineer for the City of Fort Collins, Colorado, or designated representative.

c. Laboratory. City of Fort Collins, Colorado, or their designated representative.

d. Project Engineer. The Project Manager, City of Fort Collins, Colorado or designated representative.

e. State. City of Fort Collins, Colorado (where applicable)

REVISION OF SECTION 102

PROJECT PLANS AND OTHER DATA

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

Subsection 102.05 shall include the following:

Contract documents and supporting information will be available for review until the date set for opening of bids at the following locations:

Online at the City of Fort Collins Webpage: http://www.bidnetdirect.com/colorado/city-of-fort-collins

REVISION OF SECTION 105

CONTROL OF WORK

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

In Subsection 105.02 add the following to Table 105-1:

Section No. Description Type Contractor P.E. Seal

Required?

601 Precast Concrete Unit

Shop Drawing No

601 Temporary shoring Working Drawing Yes

601 Temporary support for PRPA waterline

Working Drawing Yes

In Subsection 105.11 delete the first paragraph and replace with the following:

The utilities have been located with the Quality Level (A-D) as indicated in the plans. Any potential conflicts are identified in the plans. It is the Contractor’s responsibility to verify the location of all utilities within the project limits and coordinate conflicts as necessary.

Utility companies and City Utility providers have been notified of this project. Additional utilities may be identified by the Contractor during the utility locate process. The work described in these plans and specifications requires coordination between the Contractor and any utility company(s), it shall be the responsibility of the

Contractor to notify the respective utility company(s) and schedule the necessary adjustments. It is anticipated that utilities conflicting with construction will be moved or adjusted in coordination with the Contractor's activities by the respective utility company’s forces at no charge to the project.

The Contractor shall keep the utility company(s) advised of any work being done to their facility, such that the utility company(s) can coordinate their inspections for final acceptance of the work by the Engineer.

REVISION OF SECTION 105

CONTROL OF WORK

The Contractor shall comply with Article 1.5 of Title 9, CRS ("Excavation Requirements") when excavation or grading is planned in the area of underground utility facilities. The Contractor shall notify all affected utilities at least two business days, not including initial day of contact, prior to commencing such operations. The

Contractor shall contact the Utility Notification Center of Colorado (UNCC) to have locations of UNCC registered lines marked by member companies. Calls originating within the Denver metro area use phone number

303-534-6700; calls originating outside the Denver area use 1-800-922-1987. All other underground facilities shall be located by contacting the respective company(s). Utility service laterals shall also be located prior to beginning work.

The Contractor shall perform potholing, as required, to locate utilities that may conflict with the construction. As stated in Section 105 of the Specifications, the Contractor shall consider in the bid proposal, all of the permanent utility facilities in their present positions as shown in the Contract and as revealed by site investigation.

Additional compensation will not be allowed for foreseeable coordination from the utility facilities or the adjustment operations as indicated in the plans.

All costs incidental to the foregoing requirements will not be paid for separately but shall be included in the work.

REVISION OF SECTION 107

PERFORMANCE OF SAFETY CRITICAL WORK

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

Section 107.07 shall be revised as follows:

Include the following in the list of safety critical work elements on page 107-6 and 107-7:

(16) Removal of the existing culvert.

(17) Work and the use of cranes near the existing overhead electric line.

(18) Work requiring the use of cranes or other heavy lifting equipment to set structures.

Include the following in item (10) on page 107-8

H. Work that cannot be completed in time for the roadway to be reopened for the ditch to receive water

REVISION OF SECTION 107

PROTECTION OF EXISTING VEGETATION

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

Subsection 107.13 shall include the following:

A. The Contractor shall save all existing vegetation in this area, except for those trees and shrubs which have been designated for removal within the plans.

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

All questionable areas or items shall be brought to the attention of the Engineer for approval prior to removal or any damaging activity. Trees and/or shrubs that are damaged during construction but could have been saved shall be replaced at the expense of the Contractor.

C. The following measures shall be taken to protect existing trees adjacent to the project:

1. Fencing material shall encircle any trees whose outer drip line edge is within 20 feet of any construction activities. The fencing material shall be bright, contrasting color, durable, and a minimum of 4 feet in height. Posts used shall be comparable to metal T-post or heavier weight and placed to a depth of no less than 2 feet below ground level. Fencing material shall be placed at the drip line or 15 feet from tree trunk, whichever is greater, and maintained in an upright position throughout the duration of construction activities.

2. No material shall be placed or piled within the drip line of existing trees. No heavy objects such as wood pallets, metal railings, etc., shall lean against or come into contact with tree trunks.

3. When root cutting is unavoidable, a clean sharp cut shall be made to avoid shredding or smashing. Exposed roots shall be covered immediately to prevent desiccation. Where roots will be cut in a straight line, such as behind a curb or along a sidewalk, a saw such as a concrete saw with a sharp blade that penetrates 1 foot shall be used on top of the ground prior to excavating so that the roots are not torn or smashed during excavation.

4. Sidewalk and pavement should be contoured sufficiently to avoid cutting surface tree roots.

Whenever possible, tree roots should be bridged or floated over with walks.

5. With the approval of the City of Fort Collins representative, if foot traffic or equipment is unavoidable within the drip line, the area within the drip line shall be mulched with wood chips to a depth of six inches prior to construction activity. Six-inch mulch depth shall be maintained for the duration of the project, and shall be removed upon completion of the project.

6. Construction of Boulder walls around tress will occur prior to grading activities adjacent to existing trees.

D. Measurement and Payment: All work necessary as defined in the specifications to protect the existing trees shall not be paid for separately but shall be included in the cost of the work.

REVISION OF SECTION 108

PROSECUTION AND PROGRESS

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

Subsection 108.03 shall include the following:

Project Meetings A. Pre-Construction Conference: A Pre-Construction Conference will be held after Notice of Award and before the Notice to Proceed, the date, time and location will be determined after Notice of Award.

The conference shall be attended by:

1. Contractor and Contractor’s Superintendent

2. Contractor shall designate/introduce Superintendent

3. At this time the Superintendent will be expected to show that he has sufficient knowledge of the specifications and plans to orchestrate and coordinate the construction activities for this job.

4. Contractor’s Subcontractors (including the Traffic Control Supervisor and Surveyor)

5. Contractor shall designate/introduce Major Subcontractor’s supervisors assigned to the project

6. Engineer

7. Owner

8. Utility Companies

9. Utilities will be asked to designate their coordination person, provide utility plans, and their anticipated schedule

10. Others as requested by the Contractor, Owner, or Engineer.

B. Unless previously submitted to the Owner, the Contractor shall bring to the conference a tentative schedule of the construction project. Include in the schedule shop drawings and other submittals. Any submittals requiring long lead times and therefore must be expedited shall be submitted at the pre-construction conference, or as soon thereafter as possible.

C. The purpose of the conference is to designate responsible personnel and establish a working relationship.

Matters requiring coordination will be discussed and procedures for handling such matters established. The agenda will include:

1. Contractor’s tentative Schedule

a. The Contractor shall submit a detailed project schedule showing milestones and the critical path. This schedule shall be agreed to by both the Owner and Contractor. It shall be made in writing and signed by both parties.

2. Permit applications and submittals, including Dewatering Permit, Erosion and Sediment Control Plan, and Traffic Control Plan

3. Transmittal, review and distribution of Contractor’s submittals

4. Processing applications for payment

5. Maintaining record documents

6. Field decision and change orders

7. Use of premises, office and storage areas, staging area, security, housekeeping, and Owner’s needs

8. Proposed daily construction hours for the Engineer’s approval

9. Designation of access roads and parking

10. Contractor’s assignment of safety and first aid

D. Construction Progress Meetings:

1. Progress meetings will be conducted weekly or at some other frequency, if approved by the

Engineer. These meetings shall be attended by the Owner, the Engineer, the Contractor’s representative and any others invited by these people.

2. The Engineer will conduct the meeting, and the Engineer will arrange for keeping the minutes and distributing the minutes to all persons in attendance.

3. The agenda of these project meetings will include construction progress, the status of submittal reviews, and the status of information requests, critical work sequencing, review of strategies for connections into existing facilities, status of field orders and change orders, and any general business.

4. The Contractor will prepare a “two-week look ahead” schedule to facilitate coordination of work items.

5. The schedule shall be monitored closely during construction and may be updated by written agreement of the parties as changes occur in the project progress. If the milestones are not met, the Owner may utilize the remedies provided in the General Conditions as well as any other remedy provided by the Contract

6. Documents or provided by law or equity. The Owner may also assess liquidated damages as outlined in Article 3, Section 3.2 of the Agreement.

E. The Engineer or Engineer’s Field Representative and Contractor shall agree to weekly quantities at the progress meetings. The weekly quantity sheets shall be signed by both parties. These quantity sheets, when signed, shall be final and shall be the basis for the monthly progress estimates. This process ensures accurate monthly project pay estimates.

F. The Engineer may hold coordination conferences, to be attended by all parties involved, when the Contractor’s operations affect, or are affected by, the work of others.

1. Contractor shall participate in such conferences accompanied by Subcontractors as required by the Engineer.

Construction Schedules

A. The Contractor shall prepare a detailed schedule of all construction operations and procurement after review of tentative schedule by parties attending the pre-construction conference. This schedule will show how the Contractor intends to meet the milestones set forth.

B. No work is to begin at the site until Owner’s acceptance of the Construction Progress Schedule and Report of delivery of equipment and materials.

C. Format and Submissions

1. Prepare construction and procure schedules in a graphic format suitable for displaying scheduled and actual progress.

2. Submit two copies of each schedule to Owner for review.

a. Owner will return one copy to contractor with revisions suggested or necessary for coordination of the Work with the needs of Owner or others.

3. The Contractor will be required to submit a weekly progress schedule showing work to be completed, labor, equipment, work hours and methods of construction for the upcoming week.

This schedule will be required every Thursday in a daily calendar format.

4. The schedule must show how the street, underground utilities, concrete, and paving work will be coordinated.

D. Content

1. Construction Progress Schedule

a. Show the complete work sequence of construction by activity and location.

b. Show changes to traffic control

c. Show project milestones

2. Equipment, Materials and Submittals Schedule

a. Show delivery status of critical and major items of equipment and materials

b. Include a critical path schedule for Shop Drawings, tests, and other submittal requirements for equipment and materials.

E. Owner’s Responsibility

1. Owner’s review is only for the purpose of checking conformity with the Contract Documents and assisting the Contractor in coordinating the Work with the needs of the Project.

2. It is not to be construed as relieving contractor from any responsibility to determine the means, methods, techniques, sequences and procedures of construction.

Modifications to Time of Completion in the Approved Schedule

A. The date of beginning and the time for completion of the work are essential conditions of the Contract Documents and the work embraced shall be commenced on a date specified in the Notice to Proceed.

B. The Contractor will proceed with the work at such rate of progress to ensure full completion within the contract time. It is expressly understood and agreed, by and between the Contractor and the Owner that the contract time for the completion of the work described herein is a reasonable time, taking into consideration the climatic and other factors prevailing in the locality of the work.

C. Every effort shall be made by the Contractor to complete the project within the "Contract Time" shown in the proposal. The "Contract Time" anticipates "Normal" weather and climate conditions in and around the vicinity of the Project site during the times of year that the construction will be carried out. Extensions of time based upon weather conditions shall be granted only if the Contractor demonstrates clearly that such conditions were "unusually severe," would not have been reasonably anticipated, and that such conditions adversely affected the Contractor’s work and thus required additional time to complete the work.

D. The following specifies the procedure for the determination of time extensions for unusually severe weather. The listing below defines the anticipated number of calendar days lost to adverse weather for each month and is based upon National Oceanic and Atmospheric Administration (NOAA) or similar data for the geographic location of the project.

Monthly Anticipated Calendar Days Lost to Adverse Weather Conditions

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

(4) (4) (4) (4) (6) (3) (4) (2) (3) (3) (2) (5)

A. The above schedule of anticipated adverse weather will constitute the base line for monthly (or portion thereof) weather time evaluations. Upon acknowledgment of the Notice to Proceed and continuing throughout the contract on a monthly basis, actual adverse weather days and the impact of adverse weather days that delay the work will be recorded on a day-to-day basis. It is assumed that the work will be carried out Mondays through Fridays (holidays accepted) unless an approved construction schedule or written authorization from the Owner indicates otherwise. The number of days of delayed work due to adverse weather or the impact thereof will then be compared to the monthly adverse weather schedule above.

B. An actual adverse weather day must prevent work for 50 percent or more of the Contractor’s workday, delay work critical to the timely completion of the project and be documented by the Contractor. The City Representative observing the construction shall determine on a daily basis whether or not work can proceed or if work is delayed due to adverse weather or the effects thereof. The Contractor shall notify the Engineer in writing of any disagreement as to whether or not work can proceed on a given date, within 2 calendar days of that date. The Owner will use the above written notification in determining the number of working days for which work was delayed during each month.

C. At the end of each month, if the number of working days for which work was delayed due to adverse weather exceeds that shown in the above schedule, a Change Order will be executed which increases the Contract Time. The number of work days delayed due to adverse weather or the impact thereof will then be converted to Calendar Days based on the contract completion day and date. This conversion assumes a 5-day work week, Mondays through Fridays, holidays excepted; should the Contractor have authorization to work weekends and/or holidays, and then the method of conversion of workdays to calendar days would take this into consideration. The contract time period will then be increased by the number of calendar days calculated above and a new contract completion day and date will be set.

D. The Contractor’s schedule must reflect the above-anticipated adverse weather delays on all weather-dependent activities.

E. While extensions of time shall be granted for "unusually severe" weather or climate conditions, the Owner shall make no monetary compensation for any costs to the Contractor arising out of such delays. The Contractor shall comply with the portions of the Contract Documents relating to his project schedule and amendments thereto which result from the "unusually severe" weather condition.

F. Breakdowns in equipment or lack of performance by the Contractor will not be considered justification for an extension of time. Liquidated damages will be assessed as delineated elsewhere.

G. The Contractor shall not be charged with liquidated damages or any excess cost when the delay in completion of the work is due to the following, and the Contractor has promptly given written notice of such delay to the Owner or Engineer.

No compensation or liquidated damages will be considered for actual Calendar Days lost, not in excess of the Anticipated Calendar Days lost identified in this section.

A. To any preference, priority, or allocation order duly issued by the Owner.

B. To unforeseeable causes beyond the control and without the fault or negligence of the Contractor, including but not restricted to, acts of God, or of the public enemy, acts of the Owner, acts of another Contractor in the performance of a contract with the Owner

C. Fires, floods, epidemics, quarantine restrictions, strikes, freight embargoes, and abnormal and unforeseeable weather as provided above.

D. To any delays of Subcontractors occasioned by any of the causes specified in paragraphs 1 and 2, above.

Subsection 108.05 shall include the following:

The contractor shall schedule all work between 7:00 A.M. and 7:00 P.M. Monday through Friday, unless otherwise authorized by the Engineer

The Contractor may make emergency repairs to provide protection of the work and traveling public at any time. All on-roadway work or work that indirectly or directly interferes with the flow of traffic shall be in accordance with an approved Traffic Control Plan.

Unless waived by the Engineer, failure to meet these milestones will require assessment of liquidated damages for each milestone listed above and in accordance with Subsection 108.08.

Meetings will be required to review progress and to plan upcoming activities. Representatives from the Contractor and all active subcontractors shall attend the meetings. Such meetings will be required on a weekly basis at a time to be determined by the City of Fort Collins and the Contractor. Additional meetings will be held when required by the City of Fort Collins or the Contractor.

The Contractor shall submit at the weekly progress meeting a written statement of planned work activities and anticipated inspection, testing, and surveying requirements of the upcoming week. A 24 hour notice shall be provided to the City of Fort Collins by the Contractor if the Contractor elects to change the planned work activities.

REVISION OF SECTION 201

CLEARING AND GRUBBING

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

In Subsection 201.02 delete the second paragraph and replace with the following:

The Contractor will establish construction limits in accordance with City requirements. Clearing and grubbing shall be within the limits of the project, as directed by the Engineer.

In Subsection 201.02 delete the sixth paragraph and replace with the following:

No material or debris shall be disposed of within the project limits. Removal of waste materials and unsuitable or excess topsoil shall be legally disposed of. The Contractor shall make all arrangements to obtain written permission from property owners for disposal locations outside the limits of the project. Copies of this written agreement shall be furnished to the Engineer before the disposal area is used.

Subsection 201.02 shall include the following:

Buried perishable objects shall be removed to a depth of 3 feet below the existing ground or subgrade, whichever is lower.

REVISION OF SECTION 202

REMOVAL OF PIPE (WATERLINE)

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

Subsection 202.01 shall include the following:

This work includes removal and disposal of portions of the existing ELCO/NWCWD 24-inch waterline as necessary to accommodate construction of the box culvert.

Subsection 202.02 shall include the following:

Removal of the existing waterline shall be done according to East Larimer County Water District specifications, included in the appendix to these project specifications.

Subsection 202.11 shall include the following:

Removal of Pipe (Waterline) will be measured by the length of pipe removed, measured along the centerline of the pipe.

Subsection 202.12 shall include the following:

Payment will be made under:

Pay Item Pay Unit

Removal of Pipe (Waterline)_ Linear Feet

REVISION OF SECTION 202

REMOVAL OF ASPHALT MAT

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

Subsection 202.01 shall include the following:

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

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

The existing asphalt mat 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 legally disposed of offsite.

Subsection 202.02 shall include the following:

All required traffic control devices and signs shall be in place, with detours in operation, prior to the beginning of removal operations each day. Night work is not permitted.

During removal of the existing asphalt mat, the Contractor shall survey the existing pavement thickness and condition with the City Engineer to determine the required depth of removal and confirm the proposed full depth pavement section.

No tracked vehicles shall be permitted on streets unless approved by the City Engineer.

The Contractor shall at all times take proper precautions and be responsible for the protection of existing street surfaces not designated for removal. Any damage, even superficial, to the existing asphalt surface to remain shall be repaired at the expense of the Contractor, including but not limited to gouges, scrapes, outrigger marks, and backhoe bucket marks, etc. A slurry seal type covering will be considered the minimum repair. Patching may be required, at the discretion of the City Engineer.

Subsection 202.11 shall include the following:

Removal of asphalt mat will be measured in square yards of pavement removed, regardless of depth. The cutting of asphalt mat to a neat line where removal of asphalt mat will abut new pavement will not be paid for separately but shall be included in the work. The contractor shall perform necessary investigations required to determine the thickness of existing asphalt pavements designated for removal. These investigations will not be paid for separately, but shall be included in the work.

Subsection 202.12 shall include the following:

Pay Item Pay Unit

Removal of Asphalt Mat Square Yard

REVISION OF SECTION 203

EXCAVATION AND EMBANKMENT

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

Subsection 203.03 shall include the following:

Embankment material shall consist of approved materials that are free of organic matter and debris. Frozen material shall not be used and fill shall not be placed on frozen subgrade.

Embankment material shall meet the requirements of the following two tables:

Gradation Percent finer by weight (ASTM C136)

3” 100

1” 70-100

No. 4 Sieve 30-100

No. 200 Sieve 60 (max.)

Soil Properties Percent finer by weight (ASTM C136)

Liquid Limit 35 max.

Plasticity Index 15 max

Replace the fifth paragraph of Section 203.06 with the following:

Where fill is placed on existing slopes steeper than 5H:1V, cut benches into the existing slopes prior to fill placement. The benches should have a minimum vertical face height of 1 foot and a maximum vertical face height of 3 feet and should be cut wide enough to accommodate the compaction equipment.

Section 203.07(a) shall include the following

Engineered fill shall be compacted to at least 95% of the maximum dry unit weight as determined by AASHTO T99. For fills 8 feet in height or greater, achieve at least 98% of the maximum dry unit weight as determined by AASHTO T99 for the entire depth of fill.

Section 203.12 shall include the following

Removal of existing riprap, if required, and filling the void with Embankment Material will not be measured and paid for separately but shall be included in the work.

REVISION OF SECTION 206

STRUCTURAL BACKFILL (SPECIAL)

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

Subsection 206.01 shall include the following:

This work includes constructing a clay lining for the ditch as shown on the plans.

Subsection 206.02(d) shall be added:

206.02(d) Structure Backfill (Special). Where the existing sides or bottom of the ditch are disturbed and are to be replaced, the top two feet of backfill material shall be clay containing at least 40 percent by dry weight passing the #200 sieve (fines) and a plasticity index of 15 or greater. As an alternative, the existing material can be mixed with two percent powdered dry bentonite (by dry weight) provided the existing soils contain at least 25 percent fines. the materials upon compaction shall have a permeability less than or equal to 1x10-6 cm/sec as determined by ASTM D 5084.

Materials grain size analysis (ASTM D422), Atterberg limits (ASTM D4318), and moisture-density relationship tests (ASTM D1557) shall be completed, as a minimum, on each soil type or at a rate of 300 cy of material placed, whichever is greater.

Subsection 206.03 shall include the following:

Structure Backfill (Special) shall be compacted to 90% of the modified proctor (ASTM D1557) and within -2% to +2% of the optimum moisture content. It shall be placed in thin lifts with maximum loose lift thickness of 12 inches. Placement on ditch slopes may require overbuilding and cutting back to obtain the required compaction.

This method will create an overbuilt section that will be cut back to form the design slope.

Compaction of bedding, clay lining and all types of backfill shall be tested at a rate of at least four tests per 1,000 square feet of fill material per lift. This frequency may be altered by the engineer or company representative depending on the project, the methods by which the city is using to obtain compaction, or if the company determines circumstances warrant additional testing. The testing shall be at various depths and locations. The Engineer or the company’s representative reserves the right to request additional tests and determine the location of testing. The testing may be completed either by sand cone density test (ASTM D1556) or by the nuclear gauge (ASTM D6938) methods. Test results shall be submitted to the company’s representative within 24 hours of the test or on the next working day.

Subsection 206.07 shall include the following:

Pay Item Pay Unit

Structure Backfill (Special) Cubic Yards

REVISION OF SECTION 209

DUST PALLIATIVES

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

Subsection 209.05 shall include the following:

Application of dust palliative may be required when work is in progress and not in progress, including weekends, holidays, and nighttime.

Delete subsections 209.07 and 209.08 and replace with the following:

All labor, equipment, materials and all other work required for dust palliatives shall not be measured and paid for separately but shall be included in Section 203, Excavation and Embankment.

REVISION OF SECTION 211

DEWATERING

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

211.01 This work consists of dewatering excavations for the construction of retaining walls, channel grading, and riprap placement.

211.02 The Contractor shall be responsible for the quality and adequacy of all pumping and discharge equipment.

211.03 The Contractor shall dewater, by pumping or by excavating trenches leading to a positive gravity outlet, to a depth below the lowest concrete of other structures prior to exposing the proposed bearing surface. The dewatering process shall be commenced a sufficient amount of time in advance of placing excavation equipment thereon to prevent undue disturbance of the foundation soil. If in the opinion of the Engineer, equipment is causing undue disturbance, the Engineer may require further drying of the bearing area or place limitations on the type of equipment permitted on the bearing area. The Engineer may require the Contractor to place (at its own expense) additional filter material beyond that shown on the plans to compensate for the loss of bearing capacity.

When working with concrete near flowing water, it is imperative that flowing water does not come into contact with wet concrete. For grouted structures, the water level shall be maintained below the level of placed concrete for at least three days before the water level is allowed to rise.

The water level shall be maintained below the level of placed concrete for at least three days before the water level is allowed to rise.

The Contractor’s method of dewatering and of water disposal, including pumping and discharge equipment, must be approved by the Engineer prior to implementation.

The provisions of Section 107.25 (b)8 shall apply.

211.04 Payment will be made under:

Dewatering Lump Sum

REVISION OF SECTION 403

HOT MIX ASPHALT

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

Subsection 403.02 shall include the following:

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

Table 403-1

Property Test

Method

Value For Grading

SX(75)

Air Voids, percent at:

N (design)

CPL 5115

3.5 – 4.5

Lab Compaction (Revolutions):

N (design)

CPL 5115 75

Stability, minimum CPL 5106 28

Aggregate Retained on the 4.75 mm

(No. 4) Sieve for S, SX and SG, and on the 2.36mm (No. 8)

Sieve for ST and SF with at least 2

Mechanically Induced fractured faces, % minimum*

CP 45

Accelerated Moisture Susceptibility

Tensile Strength Ratio (Lottman), minimum

CPL 5109

Method B

Minimum Dry Split Tensile

Strength, kPa (psi)

CPL 5109

Method B

205 (30)

Grade of Asphalt Cement, Top Layer

PG 64-22

Grade of Asphalt Cement, Layers below Top

PG 64-22

Voids in the Mineral Aggregate

(VMA) % minimum

CP 48

See Table

403-2

Voids Filled with Asphalt (VFA), AI MS-2 65-80

Dust to Asphalt Ratio

Fine Gradation

Coarse Gradation

CP 50

0.6 – 1.2

0.8 – 1.6

Note: AI MS-2 = Asphalt Institute Manual Series 2

Note: Mixes with gradations having less than 40% passing the 4.75 mm (No. 4) sieve shall be approached with caution because of constructability problems.

Note: Gradations for mixes with a nominal maximum aggregate size of one-inch or larger are considered a coarse gradation if they pass below the maximum density line at the #4 screen.

Gradations for mixes with a nominal maximum aggregate size of 3/4” to 3/8” are considered a coarse gradation if they pass below the maximum density line at the #8 screen.

Gradations for mixes with a nominal maximum aggregate size of #4 or smaller are considered a coarse gradation if they pass below the maximum density line at the #16 screen.

*Fractured face requirements for SF may be waived by RME depending on project conditions.

All mix designs shall be run with a gyratory compaction angle of 1.25 degrees and properties must satisfy Table 403-1. Form 43 will establish construction targets for Asphalt Cement and all mix properties at Air Voids up to

1.0 percent below the mix design optimum.

Table 403-2

Minimum Voids in the Mineral Aggregate (VMA)

Nominal

Maximum Size*, mm (inches)

***Design Air Voids **

3.5% 4.0% 4.5% 5.0%

37.5 (1½) 11.6 11.7 11.8

N/A

25.0 (1) 12.6 12.7 12.8

19.0 (¾) 13.6 13.7 13.8

12.5 (½) 14.6 14.7 14.8

9.5 (⅜) 15.6 15.7 15.8

* The Nominal Maximum Size is defined as one sieve larger than the first sieve to retain more than 10%.

** Interpolate specified VMA values for design air voids between those listed.

*** Extrapolate specified VMA values for production air voids beyond those listed.

The Contractor shall prepare a quality control plan outlining the steps taken to minimize segregation of HMA.

This plan shall be submitted to the Engineer and approved prior to beginning the paving operations. When the Engineer determines that segregation is unacceptable, the paving shall stop and the cause of segregation shall be corrected before paving operations will be allowed to resume.

A maximum of 20% reclaimed asphalt pavement (RAP) by weight is allowed in the mix.

Hot mix asphalt for patching shall conform to the gradation requirements for Hot Mix Asphalt (Grading SX).

A minimum of 1 percent hydrated lime by weight of the combined aggregate shall be added to the aggregate for all hot mix asphalt.

Acceptance samples shall be taken as agreed between the project engineer and the contractor.

Subsection 403.03 shall include the following:

The Contractor shall construct the work such that all roadway pavement placed prior to the time paving operations end for the year, shall be completed to the full thickness required by the plans. The Contractor's Progress Schedule shall show the methods to be used to comply with this requirement.

Delete subsection 403.05 and replace with the following:

403.05 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.

Hot Mix Asphalt (Grading SX) (75) (PG 64-22) Ton

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

Sawcutting, 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 506

GROUTED RIPRAP

Section 506 of the Standard Specifications is hereby revised for this project as follows:

Subsection 506.01 shall include the following:

This work consists of the construction of grouted riprap per these specifications and in conformity with the lines and grades shown on the plans or established.

Subsection 506.02 shall include the following:

Grouted riprap shall meet the requirements of section 507.05. The riprap designation shall be d50 = 18” (Type MG) as specified in Table 507-2.

Subsection 506.03 shall include the following:

Placement of concrete mortar shall be according to section 507.11.

Subsection 506.05 shall include the following:

Measurement and payment for grouted riprap includes the total volume, complete in place of both the riprap and the concrete mortar.

Grouted Riprap Cubic Yard

REVISION OF SECTION 509

PROVIDE TEMPORARY SUPPORT

Section 509 of the Standard Specifications is hereby revised for this project as follows:

Subsection 509.01 shall include the following:

This work consists of temporarily supporting the 24” PRPA waterline during construction of the box culver underneath

it. See Revision of Section 105 Control of Work. The temporary support plan must be stamped by a professional engineer. Materials and methods used for supporting the PRPA waterline must be approved by PRPA prior to excavating around the waterline.

Add Subsection 509.311 after 509.31 as follows:

509.311 Temporary Support. Support method shall ensure maximum allowable deflection angle of 2° when pipe is being supported. Maintain a minimum of 24” of separation between proposed culvert and existing waterline.

Subsection 509.32 shall include the following:

All materials and work, including professional engineering services to design, construct, maintain and remove the temporary support system will be measured as a single lump sum that will be paid after installation of the temporary support system.

Subsection 509.33 shall include the following:

Payment will be made under

Provide Temporary Support Lump Sum

REVISION OF SECTION 619

WATER LINES

Section 619 of the Standard Specifications is hereby revised for this project as follows:

Subsection 619.01 shall include the following:

This work consists of the construction of portions of the ELCO/NWCWD 24” waterline, including fittings and thrust blocks as necessary to accomplish the work per East Larimer County Water District specifications, included in the appendix to these project specifications.

Subsection 619.02 shall include the following:

Materials will be provided by ELCO/NWCWD.

Subsection 619.03 shall include the following:

All work, including trenching, backfill, waterline construction, and pressure testing shall be according to East Larimer County Water District specifications.

Subsection 619.05 shall include the following:

Payment will be made under

Pay Item Pay Unit

24 Inch PVC Pipe (Install Only) Linear Feet

Structure excavation, structure backfill, Bac-T, and pressure testing will not be measured and paid for separately but shall be included in the work.

FORCE ACCOUNT ITEMS

DESCRIPTION

This special provision contains the Department's estimate for force account items included in the Contract. The estimated amounts marked with an asterisk will be added to the total bid to determine the amount of the performance and payment bonds. Force Account work shall be performed as directed by the Engineer

BASIS OF PAYMENT

Payment will be made in accordance with subsection 109.04. Payment will constitute full compensation for all work necessary to complete the item.

Force account work valued at $5,000 or less, that must be performed by a licensed journeyman in order to comply with federal, state, or local codes, may be paid for after receipt of an itemized statement endorsed by the Contractor.

Force Account Item Quantity Amount Minor Contract Revisions FA $150,000 Utilities FA $10,000 Erosion Control FA $5,000

Descriptions:

F/A Minor Contract Revisions – Consists of minor work authorized and approved by the Engineer, which is not included in the contract plans or specifications, and is necessary to accomplish the scope of work of this contract.

F/A Utilities – Consists of minor utility relocation and coordination work authorized and approved by the Engineer, which is not included in the contract plans or specifications, and is necessary to accomplish the scope of work of this contract.

F/A Erosion Control – Supplemental erosion control measures suggested by the Erosion Control Supervisor, but not provided for in the contract plans or specifications. All items shall be approved by the Engineer prior to installation or they will be at no cost to the project.

TRAFFIC CONTROL PLAN – GENERAL

The key elements of the Contractor's method of handling traffic (MHT) are outlined in subsection

630.10(a).

The Contractor shall follow the City…