5-RFP260252 Specifications.pdf

Louisville Jefferson County

Metro Government

Emergency Services

On-Call Maintenance & Stabilization Services

REQUEST FOR PROPOSAL

RFP260252

MILESTONE DATES

Bid Opens: May 26, 2026 Questions Due: June 9, 2026 at 3:00pmEST Submissions Due: June 24, 2026 at 3:00pmEST

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REQUEST FOR PROPOSAL

TABLE OF CONTENTS

1. Instructions to Proposers

2. Specifications

3. Evaluation Criteria

4. General Provisions

5. Hold Harmless Agreement and Indemnification Clause and Insurance Requirements

6. Human Relations Commission Required Documentation

7. Federal Terms

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SECTION 1

INSTRUCTIONS TO PROPOSERS

1.1. Introduction

The Louisville/Jefferson County Metro Government (“Metro Government”) is now accepting Proposals for on-call contractors capable of performing roadway maintenance, embankment repair, slope stabilization, drainage remediation, and related geotechnical improvements necessary to preserve roadway integrity and public safety.

The process of accepting Proposals and choosing the successful proposer shall be by sealed Requests for Proposals (“RFP’s”) using the competitive negotiation process under KRS 45A.370. The Metro Government, if it chooses to award a contract based on this Proposal, shall do so on the basis of the Proposal which is most advantageous to it based upon the Evaluation Criteria set forth herein.

(KRS 45A.370(5)).

The Metro Government finds that a purchase through competitive negotiation is necessary because specifications cannot be made sufficiently specific to permit an award on the basis of either the lowest bid price or the lowest evaluated bid price.

The Metro Government shall conduct written or oral discussions with all responsible proposers who submit Proposals determined in writing to be reasonably susceptible of being selected for award, except as otherwise provided by law. Where the Metro Government can clearly demonstrate and document from the existence of adequate competition or accurate prior cost experience with the particular supply, service or construction item, the Metro Government may make an award on the basis of the original submitted Proposals.

1.2. Considerations Prior to Submitting a Proposal

1.2.1. Revenue Commission

If you are a Metro Government vendor or you are doing business in Metro Louisville, you should already be registered with the Revenue Commission and have all of your required taxes paid. If you become the successful Proposer, you must be properly registered with the Revenue Commission and have all of your required taxes paid prior to the award of a contract.

You must provide your Revenue Commission Number on the Proposer Information and Proposal Signature Document, unless you do not yet have one.

Contact the Louisville Metro Revenue Commission at (502) 574-4860 for information related to obtaining an account number or verifying current compliance.

1.2.2. Human Relations Commission

There are two affirmative action requirements which apply to Metro Government Contracts: a) Affirmative Action in Employment and b) Affirmative

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Action in the subcontracting of Minority, Female and Handicapped-owned businesses.

1.2.2.1. Affirmative Action in Employment

1.2.2.1.1. The Louisville Metro Human Relations Commission (“HRC”) is required determine whether contractors’ employment policies assure employment opportunities are available to all citizens without regard to race, color, religion, national origin, marital status, handicap, sex, sexual orientation or gender identity, or age.

1.2.2.1.2. To make this determination, the HRC will make an inquiry of the successful Proposer pursuant to Louisville Metro Ordinances Section 37.27.

1.2.2.1.3. If you are contacted by Purchasing Division staff notifying of award, and you have not already been “HRC Prequalified”, you will need to contact the HRC at 502-574-3631 for information and assistance on procedures to follow in becoming approved and qualified.

1.2.2.1.4. Proposer acknowledges that the resulting Agreement from this RFP is subject to Louisville/Jefferson County Metro Government Ordinances §37.25-§37.36 and failure to comply with the terms of those Ordinances will be cause for suspension, termination or cancellation of a contract executed hereunder, or rejection of Proposer’s Proposal.

1.2.2.2. Affirmative Action in Subcontracting

1.2.2.2.1. Generally, either a Proposer will use subcontractors or it will do all the work itself.

1.2.2.2.2. If Not Using Subcontractors, you must complete and sign Form GFE-1, which is included with this Proposal in the HRC’s “Good Faith Efforts Requirements” document, to indicate work will be self-performed.

1.2.2.2.3. Failure to include a completed Form GFE-1 with your proposal will cause the proposal to be rejected and deemed nonresponsive.

1.2.2.2.4. If Using Subcontractors, you must follow the instructions and complete the forms in the “Good Faith Efforts Requirements” document included with this Proposal. This includes but is not limited to making the required good faith effort, as that term is defined in the document.

1.2.3. LMCO Louisville Metro Codified Ordinance Policy Certifications LMCO 112.30

1.2.3.1. Per LMCO 112.30(D):

1.2.3.1.1. Vendors who apply for business with Louisville Metro must follow the practice that initial vendor employment applications not contain a "box" or a question of inquiry on the initial application regarding an applicant's prior criminal history and applicants shall not be required to check or otherwise fill in a "box" or respond to an inquiry regarding an applicant's prior criminal history on the vendor's initial employment application, unless as otherwise provided by or required by state and federal law.

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1.2.3.1.2. Failure to adhere to this requirement shall cause your submission not to be considered for award. Louisville Metro shall retain at all times the authority to deny, rescind, revoke, terminate or not renew a contract with a vendor for failing to comply with the standards established by LMCO 112.30.

1.2.4. Requirements Regarding Sexual Assault and Sexual Harassment in the workplace, per

LMCO 39.220-224:

1.2.4.1. Per LMCO 39.222: An Organization executing a contract valued at $50K or more (“Covered Entities" shall not execute any settlement agreement concerning workplace sexual assault, sexual harassment, failure to prevent same or which concern claims of retaliation against a person reporting such matters if such an agreement prevents or restricts the disclosure of factual information related to such claims filed in a civil action or a complaint filed in an administrative action.

1.2.4.2. Reporting Requirements. Per LMCO 39.221: Each covered entity shall annually report to Louisville Metro internal complaints of workplace sexual harassment and sexual assault by employees who reside or work in Louisville/Jefferson County. The report shall be submitted to the Office of Equity.

1.2.4.3. Nondisclosure Agreements. Per LMCO 39.223: No covered entity shall, in exchange for a raise or bonus, or as a condition of employment or continued employment, require an employee to sign any agreement that prohibits the disclosure of information about unlawful acts in the workplace. “Information about unlawful acts in the workplace" includes, but is not limited to, information pertaining to harassment or discrimination or any other conduct that the employee has reasonable cause to believe is unlawful.

1.2.5. Kentucky Statutory Preferences

The Commonwealth of Kentucky requires the Metro Government to apply certain purchasing preferences as set forth in Kentucky Revised Statutes (“KRS”) Sections 45A.470, 45A.490, 492 and 494.

1. Kentucky Correctional Industries: Products made by the Department of Corrections, Division of Prison Industries, shall receive a preference equal to twenty (20) percent of the maximum points awarded to a bidder in a solicitation. (KRS 45A.470, 200 KAR 5:410)

2. Qualified bidder status: Kentucky Industries for the Blind, Incorporated, any nonprofit corporation that furthers the purposes of KRS Chapter 163, or a qualified nonprofit agency for individuals with severe disabilities as described in KRS 45A.465(3) shall receive a preference equal to fifteen (15) percent of the maximum points awarded to a bidder in a solicitation.

a. A bidder claiming qualified bidder status shall submit along with its response to a solicitation a notarized affidavit which affirms that it meets the requirements to be considered a qualified bidder. The required affidavit form can be obtained by going to Metro Louisville Metro Government’s Purchase webpage:

https://louisvilleky.gov/government/management-budget/procurement.

https://louisvilleky.gov/government/management-budget/p

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3. Reciprocal Preference (KRS 45A.490-494)

a. KRS 45A.490 Definitions for KRS 45A.490 to 45A.494.

1. "Contract" means any agreement of a public agency, including grants and orders, for the purchase or disposal of supplies, services, construction, or any other item; and

2. "Public agency" has the same meaning as in KRS 61.805.

b. KRS 45A.492 Legislative declarations. The General Assembly declares:

1. A public purpose of the Commonwealth is served by providing preference to

Kentucky residents in contracts by public agencies; and

2. Providing preference to Kentucky residents equalizes the competition with other states that provide preference to their residents.

c. KRS 45A.494 Reciprocal preference to be given by public agencies to resident bidders -- List of states -- Administrative regulations.

1. Prior to a contract being awarded to the lowest responsible and responsive bidder on a contract by a public agency, a resident bidder of the Commonwealth shall be given a preference against a nonresident bidder registered in any state that gives or requires a preference to bidders from that state. The preference shall be equal to the preference given or required by the state of the nonresident bidder.

2. A resident bidder is an individual, partnership, association, corporation, or other business entity that, on the date the contract is first advertised or announced as available for bidding:

a. Is authorized to transact business in the Commonwealth; and

b. Has for one (1) year prior to and through the date of the advertisement, filed Kentucky corporate income taxes, made payments to the Kentucky unemployment insurance fund established in KRS 341.490, and maintained a Kentucky workers' compensation policy in effect.

3. A nonresident bidder is an individual, partnership, association, corporation, or other business entity that does not meet the requirements of subsection

(2) of this section.

4. If a procurement determination results in a tie between a resident bidder and a nonresident bidder, preference shall be given to the resident bidder.

5. This section shall apply to all contracts funded or controlled in whole or in

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part by a public agency.

6. The Finance and Administration Cabinet shall maintain a list of states that give to or require a preference for their own resident bidders, including details of the preference given to such bidders, to be used by public agencies in determining resident bidder preferences. The cabinet shall also promulgate administrative regulations in accordance with KRS Chapter 13A establishing the procedure by which the preferences required by this section shall be given.

7. The preference for resident bidders shall not be given if the preference conflicts with federal law.

8. Any public agency soliciting or advertising for bids for contracts shall make KRS 45A.490 to 45A.494 part of the solicitation or advertisement for bids.

A notarized affidavit form for Bidders, Offerors, and Contractors Claiming Resident Bidder Status can be obtained by going to Metro Louisville Metro Government’s Purchase webpage:

https://louisvilleky.gov/government/management-budget/procurement if a proposer wishes to include in their proposal. Unless there are proposal from vendors from states that have a designated percentage or point procurement preference in that state, this preference will not apply.

1.4 Proposal Submittal Requirements

1.4.1 All Proposals must be signed by a duly authorized officer, agent or employee of the Bidder

(See the “Request for Proposal Signature Page” document). Bidder promises that the individual signing the Proposal document for the Bidder has the authority to bind the Bidder.

1.4.2 Sealed Proposals will be accepted until 3:00 p.m. EST on June 24, 2026.

Louisville Metro Government uses a web-based portal for accepting and evaluating proposals digitally (https://louisvilleky.bonfirehub.com/portal). Documents may be uploaded at any time during the open period. We strongly recommend that you allow sufficient time to complete uploading, submit and finalize your submission before the closing deadline.

If you have any technical questions related to your submission, please contact Bonfire at Support@GoBonfire.com.

You can also visit their help forum at https://bonfirehub.zendesk.com/hc.

1.4.3 Proposals cannot be submitted through the portal after 3:00 p.m. EST on June 24, 2026.

1.4.4 Any inquiries about this RFP shall be addressed in writing on the Bonfire portal.

1.4.5 Changes, Clarifications, Errors, Addenda:

1.4.5.1 Should a prospective Proposer find a discrepancy in or omissions from the specifications or be unclear as to what the specifications mean, the Proposer shall notify Metro Purchasing through the Bonfire portal. The Buyer will provide written clarification to all prospective Proposers. Proposer agrees that the Metro Government will not be responsible for any oral instructions.

https://louisvilleky.gov/government/management-budget/p mailto:Support@GoBonfire.com https://bonfirehub.zendesk.com/hc

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1.4.5.2 Clarification of Submittal: The Metro Government may obtain clarification or additional information from a Bidder.

1.4.5.3 Changes/Alterations: Proposer may change or withdraw its Proposal at any time prior to Proposal closing date and time.

1.4.5.4 The Proposer must respond as required in this Proposal; failure to make any required response or provide required information may cause rejection of the Proposal as nonresponsive.

1.4.5.5 Once this Proposal has been signed by Proposer and officially submitted to the Purchasing Department of the Metro Government, Proposer will not be allowed to alter or withdraw its Proposal except with the written permission of the Director of Purchasing.

1.4.5.6 Addenda: The Metro Government may issue an addendum, or addenda, changing some aspect of the Proposal. All addenda, if any, shall be considered in making the Proposal, and such addenda shall be made a part of this Proposal. Before submitting a Proposal, it is incumbent upon each Proposer to be informed as to whether any addenda have been issued, and the failure to cover in the Proposal any such addenda may result in disqualification of that Proposal.

1.4.6 The Metro Government shall not permit a Proposer to withdraw its Proposal for sixty (60) days after Proposals are opened, unless the Metro Government makes a specific exception in writing. Further, Proposal prices shall be firm for a minimum of six (6) months after the Proposal closing date.

1.4.7 Metro Government shall not be responsible for any cost incurred by the Proposer in the preparation of its Proposal.

1.4.8 If the award is divided among or between vendors, written notification will be given to each vendor of the specific items covered on their respective contracts.

1.5 Buyer Information

Name: Daniel Dadi Email: daniel.dadi@louisvilleky.gov Phone: 502-574-6396

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SECTION 2

SPECIFICATIONS

1.0 DESCRIPTION

The intent of this contract is to provide Louisville Metro Government with an on-call contractor capable of performing roadway maintenance, embankment repair, slope stabilization, drainage remediation, and related geotechnical improvements necessary to preserve roadway integrity and public safety.

Work may include both emergency and non-emergency stabilization activities, including but not limited to:

• Embankment repair and reconstruction

• Landslide and slope stabilization

• Soil nail wall systems

• Driven pile or soldier pile retention systems

• Drilled shafts and micropiles

• Drainage improvements

• Rockfall mitigation

• Roadway restoration and incidental guardrail replacement

This contract is structured as a Design-Build on-call services agreement. Contractor shall be responsible for both design and construction of stabilization systems as authorized by Work Orders.

This Contract is structured as a Design-Build, Unit Price, Indefinite Delivery / Indefinite Quantity (IDIQ) Contract. Work shall be authorized only through written Work Orders issued by the Owner. Each Work Order will define the scope, limits, and pay items applicable to the specific site. The requirements of this Specification shall apply to all Work Orders unless modified in writing by the Owner.

In addition to construction services, this Contract shall include on-call geotechnical engineering, subsurface exploration, laboratory testing, and construction materials testing (CMT) services to support Owner infrastructure projects. These services may be authorized independently or in support of construction Work Orders and may include investigation, analysis, design, testing, inspection, and reporting services.

The Contractor shall be fully responsible for the design, performance, and constructability of all geotechnical systems provided under this Contract, including but not limited to retaining systems, slope stabilization measures, and foundation elements. Review or acceptance by the Owner does not relieve the Contractor of this responsibility.

The Contractor may utilize qualified subcontractors or affiliated entities to perform geotechnical engineering, laboratory testing, drilling, and construction materials testing services.

Cooperative Purchasing / Intergovernmental Use: This Contract is intended to be available for use by other governmental entities within the Commonwealth of Kentucky, including but not limited to counties, cities, municipalities, state agencies, and other public entities.

Other governmental entities within the Commonwealth of Kentucky may utilize this Contract subject to approval by Louisville Metro Government and agreement by the Contractor.

Participation by other governmental entities shall be voluntary and shall not:

• Create any contractual obligation between Louisville Metro Government and the participating

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entity

• Require Louisville Metro Government to administer, supervise, or manage work performed for another entity

• Impose any liability on Louisville Metro Government for work performed under separate agreements

Each participating agency shall be responsible for issuing its own Work Orders or contracts, administering its own projects, and making payment directly to the Contractor.

2.0 SCOPE OF WORK

The services described herein may be performed for Louisville Metro Government or for other participating governmental entities as permitted under Section 1.0, provided that all work is authorized through written Work Orders or agreements issued by the respective agency.

2.1 The contract item "Ground Anchor Wall" includes furnishing the materials, labor, tools, equipment, and other incidental items required for the design, construction, and testing of permanent ground anchor walls as described herein.

2.2 Ground anchor wall construction includes excavating in staged lifts; drilling ground anchor drillholes;

providing, placing and grouting the encapsulated or epoxy coated anchor bar tendons into the drillholes;

placing drainage elements; placing shotcrete reinforcement; applying shotcrete facing over the reinforcement; attaching bearing plates and nuts; performing anchor testing; and installing permanent facing.

2.3 Ground anchor wall construction may require excavation in staged lifts. Excavation in the vicinity of the wall face requires special care and effort compared to general earthwork excavation and close coordination between the earthwork contractor and the Ground Anchor Wall Contractor. The Contractor shall select and be fully responsible for the method of excavation, drilling methods and equipment, final drillhole diameters, and grouting procedures necessary to meet the performance requirements of this Specification.

2.4 Construction Plans are defined as plans prepared by or for the Ground Anchor Wall Contractor under the direction of the Wall Design Engineer and accepted by the Owner’s Engineer for construction of the ground anchor wall. The Contractor shall be responsible for evaluating subsurface conditions based on available information and site observations. Claims for differing site conditions related to slope instability, groundwater, or subsurface variability will not be considered unless such conditions materially differ from those indicated in the Work Order or provided subsurface data.

2.5 On-Call Geotechnical Engineering and Testing Services. The Contractor shall provide on-call geotechnical and materials engineering services as directed by the Owner under individual Work Orders.

These services may be performed independently of construction activities or in support of stabilization and roadway improvement work.

2.5.1 Geotechnical Engineering Services

Services may include, but are not limited to:

• Site reconnaissance and geotechnical evaluations

• Slope stability analysis and landslide assessments

• Foundation evaluations for structures, retaining walls, and embankments

• Preparation of geotechnical reports and recommendations

• Design of stabilization systems including soil nails, anchors, micropiles, GRS, and drainage systems

• Emergency response evaluations for slope failures or roadway distress

• Instrumentation recommendations and monitoring (inclinometers, piezometers, etc.)

• Value engineering and constructability reviews

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2.5.2 Subsurface Exploration and Drilling

The Contractor shall perform subsurface investigations including:

• Soil borings with Standard Penetration Testing (SPT) in accordance with ASTM D1586

• Rock coring and rock quality designation (RQD) logging

• Installation of temporary or permanent monitoring instruments

• Sampling (disturbed and undisturbed samples)

• Logging of subsurface conditions by qualified personnel

• Coordination of utility clearance prior to drilling

All borings shall be performed under the supervision of a Kentucky licensed Professional Engineer or Geologist.

2.5.3 Laboratory Testing

The Contractor shall provide geotechnical laboratory testing including:

• Soil classification (ASTM D2487 / D2488)

• Moisture-density relationships (Proctor testing)

• Shear strength testing (direct shear, triaxial, UU/CU/CD)

• Consolidation testing

• Grain size analysis

• Atterberg limits

Testing shall be performed by a laboratory accredited in accordance with AASHTO R18.

2.5.4 Construction Materials Testing (CMT)

The Contractor shall provide construction inspection and testing services including:

• Soil and aggregate compaction testing

• Concrete testing (slump, air, cylinders, temperature)

• Asphalt testing and inspection

• Reinforcing steel inspection

• Structural fill and embankment testing

• Shotcrete and grout testing (as required by this Specification)

Field and laboratory testing shall comply with KYTC requirements and ASTM/AASHTO standards.

2.5.5 Reporting

The Contractor shall provide timely reporting for all services, including:

• Daily field reports (as required)

• Boring logs and subsurface profiles

• Laboratory test reports

• Engineering reports and recommendations

All reports shall be signed and sealed by a Professional Engineer licensed in Kentucky when applicable.

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3.0 REFERENCES

The documents below apply to this work:

3.1 This Contract specification.

3.2 The "Kentucky Standard Specifications for Road and Bridge Construction", Current Edition with supplements. This document may be referred to as "Specifications" or "Standard Specifications" elsewhere in this Contract specification.

3.3 Kentucky Transportation Cabinet (KYTC) “Kentucky Methods,” “List of Approved Materials,” and “Manual of Field Sampling and Testing Practices.”

3.4 American Society for Testing and Materials (ASTM) Standards, Current Edition.

3.5 American Association of State Highway and Transportation Officials (AASHTO) Standards, Current

Edition.

3.6 FHWA Publication FHWA-NHI-14-007, " Geotechnical Engineering Circular No. 7: Soil Nail Walls"

(GEC No. 7), February 2,2015.

3.7 AASHTO LRFD Bridge Design Specifications, Current Edition, with all interims.

3.8 AISC Steel Construction Manual for the design of structural hardware applies if the design is not covered in the AASHTO Standard Specifications for Highway Bridges, Current Edition, with all interims.

3.9 “Design and Construction Guidelines for Geosynthetic Reinforced Soil Abutments and Integrated Bridge

Systems”, FHWA Publication No. FHWA-HRT-17-080.

4.0 EXPERIENCE REQUIREMENTS AND SUBMITTALS

Requirements for personnel experience and pre-construction submittals, including submittal deadlines, are in this section. Do not begin construction on any ground anchor wall, other than stockpiling of wall materials, until the Engineer receives and accepts all submittals required in this section. Additional submittals and records required during and after construction may be included in other sections of this Contract specification. The use of electronic submittals (.pdf format) will expedite the approval process.

4.1 Experience Requirements

The Owner considers a satisfactory record of experience in ground anchor wall design and construction important to successfully complete this work. Use personnel meeting the requirements below on this project and submit electronically in PDF format all information necessary to verify that they meet the requirements. Submit this information no later than thirty (30) calendar days after receiving Notice to Begin Work. As a minimum, include the following for each project necessary to satisfy the requirements:

1. The names and current phone numbers of the owner’s representative(s) who can verify that the

Contractor meets the requirements.

2. The dates of construction.

3. The type (temporary/permanent) of structure.

4. The number of anchors.

5. The maximum wall design height.

The Owner will review the experience requirements and respond to the Contractor within twenty-one (21) calendar days. Review and acceptance by the Engineer is for

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evidence of the required experience and does not in any way relieve the Contractor of full responsibility for the successful and satisfactory completion of the work. The Owner reserves the right to reject any Contractor or personnel that do not demonstrate, to the satisfaction of the Engineer, sufficient experience in similar geotechnical stabilization work.

4.2 Contractor Experience Requirements

The requirements for the Ground anchor Wall Contractor are:

a. A minimum of five (5) years’ experience constructing temporary and/or permanent ground anchor retaining walls, with a minimum of three (3) projects and at least 600 ground anchors or 15,000 ft2 of wall face completed in the past five (5) years.

b. A minimum of three (3) ground anchor retaining wall projects with permanent ground anchor retaining walls at least 10 ft high completed in the past five (5) years, and at least 600 permanent ground anchors or 15,000 ft2 of wall face completed in the past five (5) years.

Only drilled and grouted ground anchors will satisfy these requirements. Some projects may be used to satisfy more than one requirement.

4.3 Personnel Experience Requirements

4.3.1 Wall Design Engineer Experience Requirements

Use a Wall Design Engineer meeting the requirements below to assume full responsibility for ground anchor wall design on this project. One or more other Engineers may assist with the design and plan preparation under the supervision of the Wall Design Engineer, who may be an employee of the Ground anchor Wall Contractor or a Consultant. However, manufacturers’ representatives may not be used to satisfy these requirements. The requirements for the Wall Design Engineer are:

a. Licensed Professional Engineer (Civil and/or Structural) in Kentucky.

b. A minimum of five (5) years design and/or construction experience on temporary and/or permanent ground anchor retaining walls, with experience on a minimum of three (3) projects and at least 600 ground anchors or 15,000 ft2 of wall face, constructed in the past five (5) years.

4.3.2 Project Engineer Experience Requirements

Use an engineer meeting the requirements below to have overall technical responsibility for ground anchor wall construction on this project. It is not necessary for the Project Engineer to be on site daily. Consultants or manufacturers’ representatives may not be used to satisfy these requirements. The requirements for the Project Engineer are:

a. Licensed Professional Engineer in the U.S.

b. A minimum of five (5) years design and/or construction experience on temporary and/or permanent ground anchor retaining walls, with experience on a minimum of three (3) projects and at least 600 ground anchors or 15,000 ft2 of wall face, constructed in the past five (5) years.

c. An employee of the Ground anchor Wall Contractor.

The Project Engineer and the Wall Design Engineer may be the same person if that person meets all the stated requirements.

4.3.3 On-Site Supervisor Experience Requirements

Use an on-site supervisor (project manager, superintendent, etc.) meeting the requirements below to be responsible for the daily ground anchor wall construction activities on this project. Consultants or manufacturers’ representatives may not be used to satisfy the requirements of this section. The requirements for the On- Site Supervisor are:

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a. A minimum of five (5) years construction experience on temporary and/or permanent ground anchor retaining walls, with experience on a minimum of three (3) projects and at least 600 ground anchors or 15,000 ft2 of wall face, constructed in the past five (5) years.

b. An employee of the Ground anchor Wall Contractor.

The On-Site Supervisor and the Project Engineer may be the same person if that person meets all the stated requirements. The Owner will consider allowing a team of more than one supervisor to satisfy these requirements and perform the associated functions, subject to certain conditions at the discretion of the Engineer. The Owner may consider related experience with other similar types of specialty construction.

4.3.3 Shotcrete Nozzlemen and Finishers Experience Requirements

Use shotcrete nozzlemen and finishers meeting the requirements below:

a. Certification in accordance with the ACI 506.3R “Guide to Certification of Shotcrete

Nozzlemen” by an ACI recognized shotcrete testing lab and/or recognized shotcreting consultant and covering the type of shotcrete to be used (plain wet-mix, plain dry-mix or steel fiber reinforced). Provide proof of ACI certification.

b. Experience with similar shotcrete application on at least three (3) projects constructed in the past five (5) years, with work totaling at least 5,000 square feet of area.

4.3.5 The Engineer may suspend work on the wall if the Contractor substitutes unqualified and/or unapproved personnel or if the personnel are not performing the required duties. If work is suspended due to substitution of unqualified and/or unapproved personnel, the Contractor is fully liable for all costs resulting from the suspension of work. No adjustment in contract time resulting from this suspension of work will be allowed.

4.4 Design Calculations and Construction Plans

For each wall, submit electronically in PDF format for review Construction Plans and Design Calculations prepared by or under the supervision of the Wall Design Engineer and signed by the Wall Design Engineer. Submit in the same format revisions to construction plans and design calculations each time corrections are required. In the design calculations and construction plans, show explicit details sufficient to allow an expeditious review of the proposed design and construction procedures. Hard copies of the reviewed and accepted plans and calculations will be required as noted in Section 4.4.2. Submit this information no later than sixty (60) calendar days after receiving Notice to Begin Work.

Submit any changes or deviations from the Construction Plans for additional review and acceptance. No adjustments in contract time will be allowed due to incomplete submittals.

Revise the drawings when plan dimensions are revised due to field conditions, evaluation of verification or proof test results, or for other reasons. Provide revised design calculations signed by the Wall Design Engineer for all design changes made during construction of the wall.

4.4.1 Design Calculations

As a minimum, include the following items:

1. A written summary report that describes the overall ground anchor wall design.

2. Applicable code requirements and design references.

3. Anchor wall critical design cross sections geometry including soil/rock strata and location, magnitude, and direction of the design slope or external surcharge loads and piezometric levels.

4. Design criteria including, soil/rock shear strengths (friction angle and cohesion), unit weights, and ground-grout pullout resistances and anchor drillhole diameter assumptions for each soil/rock strata.

5. Partial safety factors/strength factors (for Service Load Design) used in the design on the pullout

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resistance, surcharges, soil/rock unit weights, anchor head strengths, and steel, shotcrete, and concrete materials. Minimum required global stability soil factor of safety for SLD design.

6. Seismic design acceleration coefficient.

7. Anchor wall final design cross-sections geometry including soil/rock strata and location, magnitude, and direction of slope or external surcharge loads and piezometric levels with critical slip surface shown along with minimum calculated Global stability soil factor of safety of SLD design and required anchor lengths and strengths (anchor bar sizes and grades) for each anchor row.

8. Structural design calculations for wall facings and anchor head/facing connections including consideration of facing flexural and punching shear strength, headed studs tensile strength, upper cantilever, minimum reinforcement ratio, cover and splice requirements.

9. Any other necessary design calculations.

10. Global stability analysis including circular and non-circular failure surfaces using limit equilibrium methods, with a minimum factor of safety of 1.3 unless otherwise approved.

4.4.2 Construction Plans

As a minimum, include the following items:

1. A natural scale plan view of the wall identifying:

a. A reference baseline and north arrow.

b. The offset and offset from the construction centerline or baseline to the face of the wall at its base at all changes in horizontal alignment.

c. Beginning and end of wall stations and offsets.

d. Right-of-way and permanent or temporary construction easement limits, location of all known active and abandoned existing utilities, adjacent structures or other potential interferences. The centerline of any drainage structure or drainage pipe behind, passing through or passing under the wall.

e. Limits of longest anchors.

f. Subsurface exploration locations shown on a plan view of the proposed wall alignment with appropriate references base lines to fix the locations of the explorations relative to the wall.

2. A natural scale elevation view of the wall identifying:

a. The elevation at the top of the wall, at all horizontal and vertical break points, and at least every 25 ft. along the wall.

b. Elevations at the wall base and the top of leveling pads for casting CIP facing (if applicable).

c. Beginning and end of wall stations and stations of alignment breaks.

d. The distance along the face of the wall to all steps in the wall base.

e. Wall elevation view showing anchor locations and elevations; vertical and horizontal anchor spacing; and the location of wall drainage elements and permanent facing expansion/contraction joints (if applicable) along the wall length.

f. Existing and finish grade profiles both behind and in front of the wall.

g. Elevation Datum

3. Design parameters, including ultimate and allowable anchor pullout resistance.

4. General notes for constructing the wall including construction sequencing or other special construction requirements.

5. A summary of quantities of each wall showing estimated square feet of wall face.

6. Anchor wall typical section including staged excavation lifts, wall and excavation face batter, anchor spacing and inclination, anchor bar sizes, and corrosion protection details.

7. A typical detail of production and test anchors defining the anchor length, minimum drillhole diameter, inclination, test anchor bonded and unbonded test lengths and Design Test Loads (DTL’s).

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8. A ground anchor schedule including:

a. Ground anchor numbers

b. Ground anchor design loads

c. Type, size, and number of bars

d. Total anchor lengths

e. Anchor hole diameters

f. Angle of anchor inclination

g. Anchor locations and spacing

9. Details, dimensions, and schedules for all anchors, reinforcing steel, wire mesh, bearing plates, headed studs, etc. and/or attachment devices for shotcrete, cast-in-place or prefabricated facings.

10. Dimensions and schedules of all reinforcing steel including reinforcing bar bending details.

11. Details and dimensions for wall appurtenances such as barriers, coping, drainage gutters, fences, etc.

12. Details for constructing wall around drainage facilities.

13. Details for terminating wall and adjacent slope construction.

14. Facing finishes, color and architectural treatment requirements (if applicable) for permanent wall facing details.

The Owner will complete the review within thirty (30) calendar days of each submittal;

the Owner will not suspend charging working days for this review period. Insufficient design and/or plan details, as judged by the Engineer, will be cause for withholding acceptance. The Contractor is fully liable for all costs resulting from acceptance being withheld; the Owner will not suspend charging working days as the result of not accepting the design, details, or plans. Review and acceptance of the plans by the Engineer is for evidence of work to be performed and does not in any way relieve the Contractor of full responsibility for the design and for successful and satisfactory completion of the work.

After the review is completed and the Engineer accepts the Design Calculations and Construction Plans, furnish the Resident Engineer, ten (10) full sets of accepted Final Construction Plans for the Owner's use, and four (4) sets of accepted Final Design Calculations. Submit design calculations and construction plans, stamped and signed by the Ground Anchor Wall Design Engineer. Provide a set of the above information electronically in PDF format.

4.5 Construction and Materials Submittals

Submit electronically in PDF format the following. Submit this information no later than sixty (60) calendar days after receiving Notice to Begin Work and thirty (30) calendar days prior to beginning wall construction.

1. The proposed start date and proposed wall construction sequence and schedule including:

a. Plan describing how surface water will be diverted, controlled and disposed of.

b. Proposed methods and equipment for excavating the soil and/or rock to the staged excavation lifts, including the proposed grade elevations for each excavation lift.

c. Measures to ensure wall and slope stability during various stages of wall construction and excavation where discontinuous rows of anchors will be installed (if applicable);

information on space requirements for installation equipment; temporary shoring plans (if applicable); information on provisions for working in the proximity of underground facilities or utilities (if applicable).

d. Proposed anchor drilling and grouting methods and equipment including drillhole diameter proposed to achieve the required pullout resistance values and any variation of

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these along the wall alignment.

2. Grout submittal including:

a. type of mixer;

b. water/cement ratio;

c. type of additives;

d. type of cement;

e. quantity of flyash;

f. mix design;

g. design strength of grout; and

h. mix verification testing;

3. Certified mill test results for anchor bars and couplers from each heat specifying the ultimate strength, yield strength, elongation and composition.

4. Certificates of Compliance for the following materials, if used. Provide certificates stating that the material or assemblies to be provided will fully comply with the contract requirements:

a. Anchor Centralizers

b. Anchor Encapsulation

c. Bearing Plates

c. Nuts

d. Portland Cement

e. Documentation to support any other requirements in the Materials Section of this

Contract specification.

5. Shotcrete and Drainage submittals including:

a. Proposed methods of shotcrete placement and of controlling and maintaining facing alignment and location and shotcrete thickness.

b. Shotcrete mix design performed by a certified ACI Level II or KRMCA Level II technician including:

• Type of Portland cement.

• Aggregate source and gradation.

• Proportions of mix by weight and water-cement ratio.

• Proposed admixtures, manufacturer, dosage, technical literature.

• If prepackaged shotcrete is used, previous strength test results for the same shotcrete mix from the same manufacturer completed within one year of the start of shotcreting may be submitted for initial verification of the required compressive strengths at start of production work.

c. Certificates of Compliance, manufacturers' engineering data and installation instructions for the PVC drain piping, drainage geotextile, geocomposite drain strip, drain grate and accessories.

6. Proposed anchor testing methods and equipment setup including:

a. Details of the jacking frame and appurtenant bracing.

b. Details showing methods of isolating test anchors during shotcrete application (i.e., methods to prevent bonding of the ground anchor bar and the shotcrete facing during testing).

c. Details showing methods of providing the temporary unbonded length and of grouting the temporary unbonded length of test anchors after completion of testing.

d. Specific test anchor locations including stations and elevations.

e. Equipment list.

f. Identification number and certified calibration records for each test jack and pressure gauge (calibrated as a unit no more than 12 months prior to use) and load cell to be used.

7. Instrumentation submittals, if required.

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8. Any other documentation required to verify that proposed construction procedures and materials fully comply with all requirements in the contract documents.

The Owner will complete the review within thirty (30) calendar days after accepting the Design Calculations and Construction plans or within thirty (30) calendar days after receiving each submittal; the Owner will not suspend charging working days for this review period. Unacceptable methods or documentation, as judged by the Engineer, will be cause for withholding acceptance. The Contractor is fully liable for all costs resulting from acceptance being withheld; the Owner will not suspend charging working days as the result of not accepting the design, details, or plans. Review and acceptance by the Engineer are for evidence of work to be performed and does not in any way relieve the Contractor of full responsibility for the successful and satisfactory completion of the work.

4.6 Ground Anchor Wall Pre-Construction Meeting

A Pre-Construction Meeting to discuss ground anchor wall construction will be required. This meeting will be held after all ground anchor submittals in Sections 4.1, 4.2, 4.3, and 4.4 have been received, reviewed, and accepted by the Owner, after the submittals in Section 4.5 have been received by the Owner, and at least ten (10) working days prior to the beginning of ground anchor construction. The purpose of the meeting is to discuss construction procedures, personnel, and equipment to be used. The following will be expected to attend:

• Representing the Contractor and Subcontractors - Prime Contractor Representative, Ground Anchor

Wall Design Engineer, Ground Anchor Wall Project Engineer, and Ground Anchor Wall On-Site Supervisor. Also, representatives of the Excavation Contractor, Shotcreting Contractor, and Surveyor, if different than the Prime or Ground Anchor Wall Contractor.

• Representing the Quality Control Team - QCP Manager and Lead Inspector.

• Representing the Owner – Owner Engineer and others as deemed appropriate by the Owner Engineer.

If the Contractor’s key personnel change or if the Contractor proposes a significant revision to ground anchor construction procedures, additional Ground Anchor Pre- Construction meetings may be required at the discretion of the Engineer.

5.0 DESIGN

Design the ground anchor wall using the Allowable Stress Design (ASD) method, also known as Service Load Design (SLD). Primary design references include but are not limited to: FHWA Publication FHWA-NHI-14-007, "Geotechnical Engineering Circular No.7, Soil Nail Walls”, February 2, 2015; AASHTO Standard Specifications for Highway Bridges, Current Edition, with all interims. Use required partial safety factors, allowable strength factors, and minimum global stability soil factors of safety in accordance with the FHWA GEC No. 7, unless specified otherwise; critical structure requirements apply. Perform structural design of any individual wall elements not covered in FHWA GEC No. 7 by the Service Load Design methods in conformance with appropriate articles of the AASHTO Specifications. Estimated soil/rock design shear strength parameters, slope and external surcharge loads, type of wall facing and facing architectural requirements, ground anchor corrosion protection requirements, known utility locations, easements, and right- of-ways. All designs shall account for staged construction conditions, including temporary excavation phases and partially completed anchor rows.

Temporary stability shall meet a minimum factor of safety of 1.3 unless otherwise approved.

5.1 Ground Anchor Capacity Determine the allowable pullout resistance necessary to develop the required design loads using theoretical and empirical methods, and based on evaluation of the available subsurface data and/or inspection of the site. Verify the desired ground anchor capacities in accordance with the

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Ground Anchor Testing and Acceptance Section of this Contract specification.

5.2 Ground Anchor Geometry

• Provide a minimum ground anchor length of 10 ft.

• Provide a minimum anchor hole diameter of 4 inches.

• Provide an anchor inclination of at least 10o but no more than 20o.

• Do not extend the anchors beyond the right-of-way or easement limits.

5.3 Corrosion Protection

Provide design and details for Class I Protection in accordance with FHWA GEC No. 7 (Sections C.3 and C.4), except that the required thickness of bar-coating epoxy is 7-12 mils rather than 16 mils. Provide sacrificial steel allowance calculations for hollow-bar ground anchors in accordance with FHWA GEC No. 7 Ch. 10.

5.4 Structural Hardware

Design structural hardware in accordance with the current edition of the AISC Steel Construction Manual and the current edition of the AASHTO Standard Specifications for Highway Bridges with interims.

Where these conflict, AASHTO Specifications with interims govern.

5.5 Shotcrete and Wall Drainage

Design a shotcrete and permanent wall drainage system. The Wall Design Engineer is responsible for providing all necessary details required to successfully construct the shotcrete facing and wall drainage system (including weep drains, drilled drains and/or toe drains as applicable) to satisfy the design intent of the wall. Comply with AASHTO Specifications or the FHWA GEC No. 7 for any specific items that may not be addressed herein or elsewhere in the Contract Documents.

5.6 Wall Alignment

Ensure that the wall is compatible with the horizontal and vertical alignment. Survey control is the front face of the wall.

5.7 Permanent Concrete Facing

When permanent concrete facing is required, provide cast-in-place concrete facing unless otherwise specified in the plans. Refer to the plans for detail concerning formliners or other architectural treatments that may be required. Design concrete facing for full loads at final condition (in-place facing and complete construction). Provide a minimum facing thickness according to the following:

Cast-in-Place Concrete with 1 Mat of Reinforcement 10 inches Cast-in-Place Concrete with 2 Mats of Reinforcement 12 inches

The minimum concrete cover over reinforcement is 3 inches against temporary shotcrete and 2 inches on the front face. Provide joints and joint materials as necessary per the Wall Design Engineer.

Protrusions beyond the face of the wall are not allowed. Completely fill any voids between the permanent facing and the construction facing with grout.

Include details for formwork connections to the shotcrete facing and/or anchors (if applicable), proposed concrete placement method and placement rates, and accompanying structural calculations verifying the structural adequacy of the formwork, connections, and shotcrete facing and/or anchors to support the loading induced by the fluid CIP concrete. When anchors embedded into the shotcrete facing will be used to support the 1-sided CIP face form, include calculations illustrating the anchor design load (calculated as the design concrete fluid pressure times the anchor tributary area).

5.8 Surface Drainage

Coordinate design of surface drainage above the walls with the wall design.

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6.0 MATERIALS

Provide materials conforming to the minimum requirements below unless otherwise specified by the Wall Design Engineer and approved by the Engineer.

6.1 Ground Anchors

6.1.1 Solid Bar Anchors

AASHTO M31/ASTM A615, Grade 60 or 75, ASTM A722 for Grade 150. Deformed bar, continuous without splices or welds, new, straight, undamaged, and encapsulated.