RFB Packet - East Boulder Ditch Fish Passage.pdf

CITY OF BOULDER, COLORADO

Finance Department / Purchasing 1136 Alpine Ave.

P.O. Box 791 Boulder, CO 80304

Telephone: 303-413-7429 Email: mccreeryc@bouldercolorado.gov

REQUEST FOR BIDS

RFB NO. 07-2024

East Boulder Ditch Fish Passage

Construction Project

ISSUE DATE: February 07, 2024

DUE DATE: 2:00 PM, 26 February 2024

CONTACT:

Don D’Amico 303-579-0583 damicod@bouldercolorado.gov mailto:mccreeryc@bouldercolorado.gov mailto:damicod@bouldercolorado.gov

Table of Contents

Table of Contents

ADVERTISMENT………………………………………………………..………………. 1

PART 1: GENERAL RFB INFORMATION ………………………………. 2

BACKGROUND …………………………………………………………………. 2

PROJECT GOALS ……..…………………….…………………………………. 3

PROJECT COORDINATION………………………………………………… 3

PROJECT DELIVERABLES ………………………………………………… 3

AQUATIC NUISIANCE SPECIES PREVENTION….…………………. 4

TIME OF COMPLETION ………….…………………………………………. 4

PROCUREMENT SCHEDULE ….…………………………………………. 5

PROJECT CONTACT INFORMATION…………………………………… 5

PART 2: REQUIRED BID RESPONSE …………..…………….. 6

FORM 1: ACCEPTANCE OF TERMS AND CONDITIONS ……….. 7

NON COLLUSION CERTIFICATE………………………..……………….. 8

APPENDICES……………………………………………………………………………. 9

City of Boulder Consultants Contract Boilerplate ………………..10

CITY OF BOULDER, COLORADO

REQUEST FOR BIDS

RFP NO. 07-2024

CONSTRUCTION SERVICES

OPEN SPACE AND MOUNTAIN PARKS – EAST BOULDER DITCH FISH PASSAGE

CONSTRUCTION

Issued: February 7, 2024

The City of Boulder, Colorado is seeking a highly qualified contractor to build a fish passage project on the East Boulder Ditch (EBD) on South Boulder Creek.

A mandatory on-site pre-bid meeting will be held at 1:00PM on 13 February 2024 at:

City of Boulder Open Space and Mountain Parks Department 2520 55th Street Boulder CO 80303

The purpose of the pre-bid meeting is for prospective bidders to develop a better understanding of the scope of the project. ALL PROSPECTIVE BIDDERS ARE REQUIRED TO ATTEND THE PRE-BID MEETING. Bids from contractors not attending the pre-bid meeting will not be considered and will be returned unopened to the bidder. Allow approximately two (2) hours for the meeting. Inclement weather may cause rescheduling.

A copy of this Request for Bids (RFB) may be obtained from the website at:

www.bidnetdirect.com

The city will only accept electronic submissions in response to this RFB. Electronic submissions are required to be considered for an award. Please plan for a maximum file size of 2GB.

To submit your proposal online, please visit www.bidnetdirect.com/colorado. The submission deadline is 2:00 PM MST, 26 February 2024.

If you experience problems submitting your electronic response, please contact the Bidnet Direct technical support team (800-835-4603) prior to the submission deadline. The 4:00PM deadline is a hard stop. You must save your submission to the site before the deadline or you will be locked out and your submission will not be accepted. Email submissions will not be accepted.

Proposals shall be prepared at the bidder’s expense and becomes a city record and therefore a public record.

The services upon which proposals are submitted shall equal or exceed the specifications outlined in the RFB. Preference is hereby given to labor, materials, supplies or provisions produced, manufactured or grown in Colorado, quality and price being equal to articles or services offered by competitors outside the State of Colorado.

The lowest responsible and best proposal shall be accepted; provided, however, that the city, acting through its duly authorized representatives, shall have the right to reject any and all proposals and waive any informality or irregularity contained in said proposal.

City of Boulder, Colorado A Municipal Corporation

City Clerk https://protect-us.mimecast.com/s/O5LZBYimG7gt4?domain=bidnetdirect.com

The City of Boulder Open Space and Mountain Parks Department (OSMP) is seeking a highly qualified and experienced contractor to construct a fish passage project on the EBD on South Boulder Creek in Boulder County, Colorado. South Boulder Creek is a perennial stream located in southern Boulder County. The creek originates at the Continental Divide, flows eastward through the City of Boulder and empties into Boulder Creek east of Boulder.

The project site is located on City of Boulder owned property immediately east of the city, south of Baseline Road. Similar projects are those where the main focus of the work is construction of fish passage projects, irrigation infrastructure improvement projects or stream improvement projects. The City is specifically seeking contractors that demonstrate experience in more than one of these particular areas.

South Boulder Creek supports a diverse sport and native fish community. Surveys conducted by the Colorado Division of Parks and Wildlife have identified 15 species of native and sport fish within the project reach. Native species include plains topminnow, creek chub, longnose dace, longnose sucker, and white sucker. Non-native sport fish such as rainbow trout and brown trout are also present.

South Boulder Creek has a number of low-head concrete irrigation diversion dams that fragment aquatic habitat by effectively preventing upstream movement of fish and other aquatic organisms above the dams. The City of Boulder Open Space and Mountain Parks Department has completed fish passage projects on three structures on South Boulder Creek upstream of this location resulting in the defragmentation of more than four miles of aquatic habitat. The fishway should be designed to allow passage of native and non-native fish including long nose dace, long nose sucker, plains topminnow, creek chub, brown trout and rainbow trout.

The EBD diversion dam is located approximately 0.3 miles upstream of Baseline Road. It is a concrete diversion dam with a bypass channel and headgate on the east side of the structure. The diversion is located on the inside of a meander bend and at a height that backs up water 200 feet upstream. It is subject to sediment deposition in front of the diversion and headgate, necessitating sediment removal on a regular basis.

Engineering design plans have been developed for this project and are included in this RFB. These plans include details for all improvements and structures necessary to complete the project. Construction specifications and special conditions are also included in the plan set and as separate documents.

OSMP is interested in bids that demonstrate the necessary skills, expertise and experience to build this project in sensitive habitat on highly visited public land. Please include a 1-2 page resume or cover letter with your submission that displays your experience directly related to this project. Site conditions include two multi-use trails and high trail usage, habitat with federally threatened species and regulated wetlands. Contractors will be expected to limit disturbance to within a small corridor between South Boulder Creek and the trails.

BACKGROUND

PROJECT GOALS

PART I: General RFBB Information

The project goal is to build a fish passage project according to existing design plans and specifications. Design plans are attached. The project will accomplish the following:

- Provides passage for native and sport fish

- Ensures the EBD receives and can deliver its decreed water

- Ensures no injury to instream flow water right

- Reduces maintenance efforts associated with ditch operations

- Increases the resiliency of the structure and neighboring channel to future flood events

- Ensures proper functioning fluvial processes (sediment transport, etc.)

- Improves the ecological functioning of South Boulder Creek and its riparian area

Project coordination with City of Boulder Open Space and Mountain Parks Department and EBD Company staff is an important component of this project. OSMP and EBD expect the selected contractor will work closely with the city and company staff to ensure project goals are met. The contractor should include time for meetings and coordinate with OSMP throughout all phases of the project.

The project deliverable is a fish passage project that meets or exceeds final construction plans and specifications sufficient to achieve the project goals stated above. Specifically, the completed project will include but is not limited to the following:

1. All structures and improvements built to plan specifications

2. A constructed project that will meet all the project goals

3. All required permits, clearances, and authorizations to construct the project as designed that have not been previously obtained

4. Digital files, in both .pdf and GIS-compatible formats, of as-built topographical conditions completed by a Professional Land Surveyor licensed in Colorado

Open Space and Mountain Parks uses Geographic Information Systems (GIS) to store, manage and maintain our geographic/spatially related data. Our base data layers reside in the State Plane coordinate system. Specifically we use the following projection:

• PROJCS["NAD_1983_HARN_StatePlane_Colorado_North_FIPS_0501_Feet",GEOGCS["GCS_North_American_1983

_HARN",

• DATUM["D_North_American_1983_HARN",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Gree nwich",0.0],

• UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Eastin g",3000000.000316083], PROJECT STAKEHOLDERSPROJECT COORDINATION

PROJECT DELIVERABLES

• PARAMETER["False_Northing",999999.999996],PARAMETER["Central_Meridian",- 105.5],PARAMETER["Standard_Parallel_1",39.71666666666667],PARAMETER["Standard_Parallel_2",40.7833 3333333333],

• PARAMETER["Latitude_Of_Origin",39.33333333333334],UNIT["Foot_US",0.3048006096012192

For the purposes of this project, “electronic GIS-compatible file” means that georeferenced data is submitted with accompanying metadata in one of the following formats:

• An ESRI Map Package .mpk

• An ESRI layer, layer package, shape file or file geodatabase projected to NAD_1983_HARN_StatePlane_Colorado_North_FIPS_0501_Feet

• A CAD DXF or DWG georeferenced to

NAD_1983_HARN_StatePlane_Colorado_North_FIPSs_0501_Feet

• GPS data can be provided as a .shp, .gpx, or .kml

Any equipment, including field protective gear (i.e. waders, boots), to be used in the stream shall be decontaminated prior to arrival on the project site to ensure no ANS are introduced to the project area. If prospective bidders visit the site, they shall use decontamination procedures outlined in the attached document.

OSMP has obtained the following permits for this project:

- USACOE Section 404 permit

- USFWS Section 7 clearance

- Boulder County Land Use Limited Impact Special Use review

- City of Boulder wetland permit

- Boulder County Floodplain Development permit

The contractor will be responsible for all other permits required to complete the project, which may include, but is not limited to:

- State of Colorado Stormwater Management Permit and Dewatering Permit

- Boulder County Traffic Control Plan

- Boulder County Storm Water Quality Permit

- Boulder County Grading Permit

Work on this project is expected to begin no later than five (5) consecutive calendar days after the date of the issuance of the "Notice to Proceed" (City of Boulder Purchase Order).

TENTATIVE PROJECT SCHEDULE

PROCUREMENT SCHEDULE

TIME OF COMPLETION

AQUATIC NUISANCE SPECIES (ANS) PREVENTION

PERMITTING

RFB issued …………………………………………... 7 February 2024 Mandatory pre-bid meeting.…………………. 13 February 2024 Questions Due…………………………………………16 February 2024 Proposals due………………………………………. 26 February 2024 Contractor selected………………………………. 5 March 2024 Notice to Proceed issued………………………. 11 March 2024

Upon release of this RFB, all consultant communications concerning the overall RFB should be directed to the Project Coordinator listed below. Unauthorized contact regarding this RFB with other city or ditch company employees may result in disqualification. Any oral communications will be considered unofficial and non-binding on the city. Consultants should rely only on written statements issued by the Project Coordinator or the City of Boulder Purchasing Division.

Name: Don D’Amico Address: City of Boulder

Open Space and Mountain Parks Department 2520 55th Street Boulder, Colorado 80303

Telephone: 303.579.0583 E-mail: damicod@bouldercolorado.gov

PART II: Required Bid Response

PROJECT CONTACT INFORMATION

Vendors who request clarification of the solicitation’s requirements may submit written questions to the project manager at the email address listed above by 4:00 PM (Mountain Time) on February 16th, 2024. All questions and answers will be posted as an addendum on Rocky Mountain Bidnet. Vendors should rely only on written statements issued by the RFB Coordinator.

mailto:damicod@bouldercolorado.gov

REQUIRED BID RESPONSE

To be considered, all bids shall be submitted in accordance with the instructions in this RFB and include the following completed forms:

• City of Boulder Bid Proposal. Please include the separate excel spreadsheet with your submission

• City of Boulder Bid Bond in the amount of 5% of the total bid

• City of Boulder Bid Form

• City of Boulder Acceptance of Terms and Conditions

• City of Boulder Non-Collusion Certificate

• City of Boulder Contractor/Subcontractor Qualification Form

• City of Boulder Schedule of Manufacturers and Suppliers

• City of Boulder Schedule of Proposed Subcontractors

• 1-2 page resume or cover letter that displays your experience directly related to this project.

In addition to the following copies, these forms, minus the Bid Proposal, have also been included as a separate PDF file in the BidNet documents section. The PDF file is labeled Required Bid Documents. You will also find the Microsoft Excel spreadsheet for pricing in the same documents section in BidNet. The spreadsheet is labeled 07-2024 East Boulder Ditch Bid Proposal

BID BOND

Witness:

, as principal, hereinafter called the “bidding contractor,” and , as “surety,” a corporation properly organized under the laws of Colorado or authorized to do business in Colorado, hereby obligate themselves to the City of Boulder, as obligee, hereinafter called the “city,” in the penal sum of dollars ($ ), which penal sum shall secure the obligation of the bidding contractor to enter into contract with the city for the work associated with

Project Number , if the bidding contractor is so selected by the city.

If the city accepts the bid of the bidding contractor, and if the bidding contractor properly executes a contract with the city to perform the work covered by the award, then this obligation shall be null and void.

In the alternative, if the bidding contractor refuses to enter into contract with the city for work described in the bid, but rather pays to the city the difference between the bidding contractor’s stated bid amount and the actual amount bid by an alternate bidding contractor, who is accepted by the city, then this obligation shall be null and void.

EXECUTED on this day of , 20 .

(Contractor)

By:

(President)

(Surety Company)

By:

(Attorney-in-Fact)

BID FORM

07-2024 East Boulder Ditch Fish Passage Construction Project

The undersigned Bidder does hereby declare and stipulate that the Bid Proposal is made in good faith, without collusion or connection with any other person or persons bidding for the same work, and that it is made in pursuance or and subject to all the terms and conditions of the bid documents entitled "07-2024 East Boulder Ditch Fish Passage Construction Project”, all of which have been examined by the undersigned.

Bidders shall submit prices as provided in the Bid Proposal. Should an error occur in the extension of price, the unit price shall govern.

The City of Boulder reserves the right to make the award on the basis of the bid deemed most favorable to the City, to waive any informalities or to reject any or all bids.

The bidder shall complete the attached Contractor / Subcontractor Qualification Form, with the bid proposal. The City is requesting the form be completed for both Contractor and Subcontractor. Failure to provide this information may be sufficient cause for rejection of the bid.

The bidder shall complete the attached Proposed Subcontractors Form, with the bid proposal.

Failure to provide this information may be sufficient cause for rejection of the bid.

The bidder shall complete the attached Schedule of Manufacturers and Suppliers Form, with the bid proposal. Failure to provide this information may be sufficient cause for rejection of the bid.

Addendum No.(s) have been received.

Attached is an unconditional letter of credit, money order, certified check, or bid bond payable to the City of Boulder in an amount not less than five percent (5%) of the total amount of the bid.

If this bid is accepted, the Bidder agrees to sign the contract agreement without qualifications and to furnish the performance bond, labor and material bond and the required evidence of insurance within 10 calendar days after notification of award.

All proposals shall be submitted on the bid proposal. The lowest responsible bid will be accepted; provided, however, that the City shall have the right to reject any or all bids and to waive any informalities or irregularities contained in said bid. The quantities are an estimate only and may be altered to meet actual City of Boulder requirements.

Submit firm unit prices for the type of construction listed. Overhead shall not be priced and bid separately but shall be included in each bid item as required. All prices are for furnishing and installing the described item.

The Bidder proposes to perform all work and provide all labor, materials, and equipment in full accordance with the bidding documents.

Confidential data, if identified as such, will be held confidential upon request, if the request is made as part of the bid and the City Attorney determines the data meets the minimum requirements of the Colorado Public Records Act.

ATTEST:

Corporation

President Date Address City State Zip Code Phone number

Email

ATTEST: Company Name

Company Partner Date Address City State Zip Code Phone number

Email

ATTEST:

Individual

Company Name

Date Address City State Zip Code Phone number

Email

Tax Identification Number It is imperative that the Business and/or vendor name (surname for an individual) and TIN number combination (Employer Identification Number for a Business or Social Security Number for an individual) match exactly.

ACCEPTANCE OF TERMS AND CONDITIONS

Use this form to indicate exceptions that your firm takes to any terms and conditions listed in the Agreement attached to this RFB, as well as the RFB itself. Proposals which take exception to the specifications, terms, or conditions of this RFB or offer substitutions shall explicitly state the exception(s), reasons(s) therefore, and language substitute(s) (if any) in this section of the proposal response. Failure to take exception(s) shall mean that the proposer accepts the conditions, terms, and specifications of the RFB.

If your firm takes no exception to the specifications, terms, and conditions of this RFB, please indicate so.

List exceptions here:

Signed, By:

Title

Date

For:

NON-COLLUSION CERTIFICATE

The undersigned, being duly sworn, deposes and says that the person, firm, association, partnership- or corporation herein named, has not, either directly or indirectly, entered into any agreement, participated in any collusion, or otherwise taken any action in restraint of free competitive bidding in the preparation and submission of a proposal to the City of Boulder for consideration in the award of a contract on the project described as follows:

07-2024 East Boulder Ditch Fish Passage Construction Project

(Firm Name)

By:

(Authorized Signature)

Name:

Title:

Email:

CONTRACTOR/SUBCONTRACTOR QUALIFICATION FORM

I. General Information

Your Company:

Name:

Address:

How long have you been in business?

How long have you been in business under the present business name?

What former name(s), if any, has your company operated under in the past five (5) years?

What is the largest contract you have been awarded in the past twelve (12) months?

II. Information: Previous Construction Contract

Provide the following information for three 3) contracts you have performed, or are currently performing, within the past five (5) years. At least two (2) contracts must be completed. If you have performed any contract with the City of Boulder, or County of Boulder, or State of Colorado, include information about the least one (1) such contract.

Contract 1

Owner

Name

Address Phone

Date Begun Date Completed Dollar Amount

Description of Work

Architect

Surety for Performance Bond:

Surety for Labor and Material Bond:

Insurance Company:

Major Subcontractor:

Major Supplier:

Are there any lawsuits, claims, or disputes resulting from this project? If so, please describe:

Contract 2

Description of Work

Contract 3

Description of Work

III. Describe the work you normally perform with your own forces:

IV. Have you, or any officer or partner of your organization, when working for another organization, failed to complete any work awarded to you or such officer or partner? If so, attach a separate sheet of explanation.

V. Are there any claims or law suits against your organization, against predecessor organizations of your organization, or against any officer or partner who currently works for your organization which have been brought during the previous five years? If so, attach a separate sheet of explanation.

VI. Resumes

Provide resumes for at least two (2) persons with your company. One resume should be for an officer of the company: president, vice-president, etc. The second resume should be for an operations manager of the company who has had experience directing a job as a contractor or superintendent. An operations manager may also be an officer of the company.

Officer:

Operations Manager:

VII. Trade References:

1.

2.

3.

4.

5.

VIII. Bank References:

1.

2.

3.

4.

5.

IX. Name of Bonding Company and name and address of agent:

Revised April 2021

X. Attach a financial statement, audited if available, (consolidated if the contractor is part of an affiliated group), including contractor's latest balance sheet and income statement showing the following items:

A. Current Assets (e.g., cash, joint venture accounts, accounts receivable, notes receivable, accrued income, deposits, materials inventory, and prepaid expenses):

B. Net Fixed Assets:

C. Other Assets:

D. Current Liabilities (e.g., accounts payable, notes payable, accrued expenses, provision for income taxes, advances, accrued salaries, and accrued payroll taxes):

E. Other Liabilities (e.g., capital, capital stock, authorized and outstanding shares par values, earned surplus, and retained earnings):

Name of firm preparing financial statement and date thereof:

Is this financial statement for the identical organization named in Part I on page one?

If not, explain the relationship and financial responsibility of the organization whose financial statement is provided (e.g., parent-subsidiary).

Will this organization act as guarantor of the contract for construction?

SCHEDULE OF MANUFACTURERS AND SUPPLIERS

Name Phone No.

Address

City State Zip Code

PROPOSED SUBCONTRACTORS

East Boulder Ditch Fish Passage Project

Boulder Open Space and Mountain Parks

CONTRACT DOCUMENTS

TECHNICAL SPECIFICATIONS

PREPARED BY:

OneFish Engineering, LLC June 8, 2021 132 Davidson Pl, Pagosa Springs, CO 84117 970-237-0739

THIS PAGE INTENTIONALLY LEFT BLANK

01770-3

SECTION 00010

TABLE OF CONTENTS

BOULDER OPEN SPACE AND MOUNTAIN PARKS

East Boulder Ditch Fish Passage Project

Division 02 – Site Construction

Section 02115 – Move In and Site Preparation Section 02130 – Clearing and Grubbing Section 02220 – Earthwork Section 02350 – Rock Section 02401 – Dewatering Section 02480 – Finish Grading, Seeding, and Landscaping

Division 03 – Metals Section 05500 – Miscellaneous Metalwork

Division 05 – Metals

Section 05500 – Miscellaneous Metalwork

Division 02 Site Construction

02115 - 1

SECTION 02115

MOVE IN AND SITE PREPARATION

PART 1 GENERAL

1.01 WORK INCLUDED

A. This section covers the coordination and work necessary to move in personnel and equipment, set up all temporary facilities, utilities, and prepare the site for construction.

1.02 GENERAL

A. The Contractor shall coordinate the location of any temporary facilities with the

Owner.

PART 2 PRODUCTS

2.01 TEMPORARY FACILITIES

A. The Contractor shall provide all temporary facilities as required for performing the work.

PART 3 EXECUTION

3.01 COORDINATION

A. The project site is located on private property. Before move in and site preparation, the Contractor shall notify and coordinate with the Engineer and Owner.

3.02 LAYOUT

A. Set up construction facilities in a neat and orderly manner within Contractor-secured staging areas. Accomplish all required work in accordance with applicable portions of these Specifications. Confine operations to work area shown.

3.03 OBSTRUCTIONS

A. Some obstructions may not be shown. Contractors are advised to carefully inspect the existing site before preparing their bids. The removal and replacement of minor obstructions such as fences, culverts, small piping, and similar items shall be anticipated and accomplished, even though not shown or specifically mentioned.

02115 - 2

B. Major obstructions encountered that are not shown on the Drawings, or could not have been foreseen by visual inspection of the site prior to bidding, should immediately be brought to the attention of the Engineer. The Owner will make a determination before proceeding with the work. If the Owner finds that the obstruction adversely affects the Contractor’s costs or schedule of completion, a proper adjustment to the Contract will be made in accordance with the General Conditions.

END OF SECTION 02115

02130 - 3

SECTION 02130

CLEARING AND GRUBBING

A. The work of this section consists of the clearing, removal and disposal of vegetation, including stumps and roots; abandoned structures; fences and debris that will interfere with the construction of this project, and salvaging and stockpiling existing topsoil.

2.01 GENERAL

A. Provide all materials and equipment, suitable and in adequate quantity, required to accomplish the work as specified herein.

3.01 GENERAL

A. Clearing and Grubbing for the construction of the Project shall not extend beyond the construction limits except as accepted by the Owner or Engineer. Clearing for project construction shall not exceed any easement limits.

3.02 CLEARING

A. Clearing shall consist of the removal and disposal of trees, stumps, shrubs, brush, grass, vegetation, surface debris, abandoned structures, fences, and other objectionable matter from within the described clearing limits. The CONTRACTOR shall only remove trees and shrubs that are absolutely necessary for the execution of the work and shall make all efforts to minimize tree removal.

In addition, trees shall be removed in a manner to allow them to be reused on the site for instream structures.

3.03 GRUBBING

A. Grubbing shall consist of the excavation, removal, and disposal of roots, matted roots, and buried and surface debris from within the described clearing limits. In areas of grading or excavation, remove stumps, roots, structures or foundations a minimum of 12 inches below finished grade. In areas of embankment remove stumps, roots, structures or foundations a minimum of 12 inches below original grade. Backfill all grubbing holes, with accepted material and compact to approximately the same density as the existing surrounding soils.

3.04 PRESERVATION OF TREES, SHRUBS, AND OTHER VEGETATION

02130 - 4

A. Protect trees, shrubbery, and other vegetation not designated for removal from damage resulting from the work. Cut and remove tree branches only where, in the opinion of the Engineer, such cutting is necessary to effect construction operation.

Remove branches other than those required to provide a balanced appearance of any tree, as accepted, prior to removal. Scars resulting from the removal of branches shall be treated with an accepted tree sealant.

3.05 SALVAGE AND PROTECTION

A. Merchantable timber, sod, or debris shall become the property of the Contractor for his disposal; unless such material is acceptable and required for landscaping as specified in later sections of these Contract Documents.

B. The Contractor shall protect plant growth and features remaining as final landscaping.

C. The Contractor shall protect survey benchmarks, control points, and existing work from damage or displacement.

D. The Contractor shall maintain a designated site access for vehicle traffic.

E. The Contractor shall salvage and protect existing fence wire, wood posts, metal posts and any other structures not to be removed from the project site.

3.06 TOPSOIL

A. All cleared topsoil material shall be stockpiled and used for final dressing. Locate topsoil stockpiles so that the material can be used readily for the finished grading.

Protect topsoil and keep in segregated piles until needed.

3.07 DISPOSAL OF WASTE MATERIAL

A. No burning shall be permitted on the construction site. Noncombustible material shall become the property of the Contractor and shall be removed from the site of work.

B. It shall be the Contractor's responsibility to select an acceptable method of disposal for vegetation or debris not salvageable. The Contractor shall be responsible for obtaining the necessary authorization from State and local agencies for disposal if required; and any accidental loss or damage as a result of the chosen disposal method shall be the Contractor's responsibility and shall in no way involve the Owner or Engineer.

END OF SECTION 02130

02220 - 1

SECTION 02220

EARTHWORK

A. The work of this section covers all excavation, backfill, and embankment associated with the construction of the various structures.

A. See the GENERAL CONDITIONS and Division 1, GENERAL REQUIREMENTS, which contain information and requirements that apply to the work specified herein and are mandatory for this project.

1.03 CLASSIFICATION OF EXCAVATED MATERIAL

A. Unclassified Excavation: Materials encountered during the construction of the work regardless of their nature or the manner in which they are removed, will be considered unclassified excavation.

1.04 DEFINITIONS

A. Relative Compaction: The ratio, in percent, of the as-compacted field dry density to the laboratory maximum dry density as determined by ASTM D698. Corrections for oversize material may be applied to either the as-compacted field dry density or the maximum dry density, as determined by the Engineer.

B. Optimum Moisture Content: Determined by the ASTM standard specified to determine the maximum dry density for relative compaction. Field moisture content shall be determined on the basis of the fraction passing the 3/4-inch sieve.

C. Relative Density: As defined by ASTM D4253 and D4254.

D. Prepared Ground Surface: The ground surface after clearing, grubbing, stripping, excavation, and scarification and/or compaction.

E. Completed Course: A course or layer that is ready for the next layer or next phase of the work.

F. Well-Graded: A mixture of particle sizes that has no specific concentration or lack thereof of one or more sizes. Well-graded does not define any numerical value that must be placed on the coefficient of uniformity, coefficient of curvature, or other specific grain size distribution parameters. Well-graded is used to define a material type that, when compacted, produces a strong and relatively incompressible soil mass free from detrimental voids.

G. Influence Area: The area within planes sloped downward and outward at an angle of

02220 - 2

45 degrees from the horizontal from (a) 1 foot outside the outermost edge at the base of foundations or slabs; or (b) 1 foot outside the outermost edge at the surface of roadways or shoulder; or (c) 0.5 foot outside the exterior edge at the spring line of pipes and culverts.

H. Borrow: Material imported from borrow areas off the immediate project site.

I. Selected Backfill Material: Material available onsite that the Engineer determines to be suitable for a specific use.

J. Imported Material: Material obtained by the Contractor from sources off the immediate project site.

K. Structural Fill: Fill material as required under and/or adjacent to structures, paving, sidewalks, driveways, curb, etc.

L. Embankment: The fill material required to raise the existing grade in areas other than under structures.

M. Unsuitable Materials: Unsuitable materials shall consist of debris, rubble, trash, organics, and other deleterious materials as determined by the Engineer. Unsuitable materials shall include previously placed, non-Engineered fills that were not placed in maximum 6-inch to 8-inch thick lifts and not compacted to the densities specified herein.

1.05 SUBMITTALS

A. Shoring Plan:

1. The Contractor’s shoring or excavation sloping systems for the structures shall be designed by a Professional Engineer with drawings and calculations submitted with the Professional Engineer’s stamp and signature. The Contractor shall submit plans, drawings, and calculations for the proposed systems. The submittals shall include information on scheduling and sequencing of construction and protection of new and/or existing structures and utilities. Design calculations shall address the sequence of excavation and placement of lateral support elements. Drawings shall show the locations of all system elements in plan and section. Design calculations should demonstrate the adequacy of the systems and selected components.

2. Review by the Engineer of submittals by the Contractor shall not in any way be considered to relieve the Contractor from full responsibility for errors therein or from the entire responsibility for complete and adequate design and performance of dewatering and shoring or excavation sloping systems. The Contractor shall be solely responsible for proper design, installation, operation, and maintenance, and any failure of any component of the dewatering and shoring or excavation sloping systems.

B. Imported Structural Fill: Contractor shall provide material gradations of all imported

02220 - 3 structural fill.

1.06 IMPORTED MATERIAL ACCEPTANCE

A. All imported materials specified in this section are subject to the following requirements:

1. All tests necessary for the Contractor to locate an acceptable source of imported material shall be made by the Contractor. Certification that the material conforms to the Specification requirements along with copies of the test results from a qualified commercial testing laboratory shall be submitted to the Engineer for approval at least 10 days before the material is required for use. All material samples shall be furnished by the Contractor at the Contractor's sole expense. Samples shall be representative and be clearly marked to show the source or the material and the intended use on the project. Sampling of the material source shall be done by the Contractor in accordance with ASTM D75. Notify the Engineer at least 24 hours prior to sampling. The Engineer may, at the Engineer's option, observe the sampling procedures. Tentative acceptance of the material source shall be based on an inspection of the source by the Engineer and/or the certified test results submitted by the Contractor to the Engineer, at the Engineer's discretion. No imported materials shall be delivered to the site until the proposed source and materials tests have been tentatively accepted in writing by the Engineer.

Final acceptance will be based on tests made on samples of material taken from the completed and compacted course. All testing for final acceptance shall be performed by the Contractor.

2. Gradation tests and standard Proctor tests shall be made by the Contractor on samples taken at the place of production prior to shipment. Samples of the finished product for gradation and Proctor testing shall be taken from each 500 tons of prepared materials or more often as determined by the Engineer, if variation in gradation is occurring, or if the material appears to depart from the Specifications. Test results shall be forwarded to the Engineer within 48 hours after sampling.

3. If tests conducted by the Contractor or the Engineer indicate that the material does not meet Specification requirements, material placement will be terminated until corrective measures are taken. Material which does not conform to the Specification requirements and is placed in the work shall be removed and replaced at the Contractor's sole expense. Sampling and testing performed by the Contractor shall be done at the Contractor's sole expense.

1.07 SHORING, SHEETING, BRACING, AND SLOPING

A. Install and maintain shoring, sheeting, bracing, and sloping necessary to support the side of the excavation, to keep and to prevent any movement which may damage adjacent pavements, utilities, or structures, damage or delay the work, or endanger life and health. Install and maintain shoring, sheeting, bracing, and sloping as required by OSHA and other applicable governmental regulations and agencies.

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1.08 EXCAVATION SAFETY

A. The Contractor shall be solely responsible for making all excavations in a safe manner. Provide appropriate measures to retain excavation sideslopes and prevent rock falls to ensure that persons working in or near the excavation are protected. Any necessary trench excavation permits shall be the responsibility of the Contractor.

1.09 CODES, ORDINANCES, AND STATUTES

A. Contractors shall familiarize themselves with, and comply with, all applicable codes, ordinances statutes, and bear sole responsibility for the penalties imposed for non-compliance.

1.10 TOLERANCES

A. All material limits shall be constructed within a tolerance of 0.1 foot except where dimensions or grades are shown or specified as minimum. All grading shall be performed to maintain slopes and drainage as shown. No reverse slopes will be permitted.

1.11 QUALITY ASSURANCE

A. The Contractor shall perform earthwork operations in compliance with these specifications and within the applicable requirements of governing authorities having jurisdiction.

B. Over-excavation made by the Contractor in earth or rock beyond the specified line and grade shall be corrected, at the expense of the Contractor. In areas under slabs or footings, this shall be done by filling with structural fill meeting the requirements in this section and compacted to 95 percent of maximum density at optimum moisture as determined by ASTM D698. Any other costs incurred by the Owner, or the Engineer as a result of the over-excavation, such as professional Engineering or construction inspection services or additional materials, shall be the responsibility of the Contractor. If the over-excavation is directed by the Engineer, the excavation will be paid at a price negotiated with the Contractor through a change order to the lines and grades specified by the Engineer.

C. Under-compacted soil placed by the Contractor shall, at the expense of the

Contractor, be corrected by additional compaction effort or excavation, replacement, and compaction. Any costs incurred by the Owner or the Engineer as a result of the under-compaction, such as additional professional Engineering services, materials testing, or construction inspection services, shall be the responsibility of the Contractor.

D. Owner will contract with a third party testing firm for initial field density testing.

The cost for any re-testing due to failed initial tests will be the responsibility of the Contractor.

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E. BRACING AND SHORING: Safe temporary cut slopes are the responsibility of the Contractor who shall meet all appropriate OSHA regulations including but not limited to; "Constructions Standards for Excavations" (29 CFR Part 1926.650-.652) Subpart P, effective on the date of the bid opening.

2.01 EQUIPMENT

A. The Contractor may use any type of earthmoving and compacting equipment he may choose; except only walk behind hand compaction equipment will be utilized within 5 feet of structure walls and provided the equipment is in satisfactory condition and of such capacity as to fulfill the requirements of this section.

B. No embankment shall be started or continued without adequate compaction equipment on hand. If watering is required, tank wagons or tank trucks with a distributor capable of spreading the water evenly across the width of the distributor shall be used.

2.02 MATERIAL

A. Onsite Structural Fill and Backfill: Excavated native clean sandy gravel material may be used for structural fill and backfill if it is free of detrimental quantities of organic material, such as vegetation, roots, or peat. Rocks larger than 3-inches in average dimension shall not be used in backfill. In order to be used as backfill, native earth material shall be well graded from coarse to fine. Provide imported material of equivalent quality, if required to accomplish the work.

B. Imported Structural Fill and Backfill: Imported structural fill shall be clean sandy gravel that meets the following gradation requirements:

Sieve or Screen Size Percent Passing By Dry Weight 3-inch 100 No. 4 26-60

No. 200* 10 (max)

C. Riprap: Riprap shall be as specified in Section 02350, ROCK RIP RAP.

2.03 WATER FOR COMPACTION

A. Furnish as required.

2.04 COMPACTION EQUIPMENT

A. Compaction equipment shall be of suitable type and adequate to obtain the densities specified, and shall provide satisfactory breakdown of materials to form a dense fill.

B. Compaction equipment shall be operated in strict accordance with the manufacturer's

02220 - 6 instructions and recommendations. Equipment shall be maintained in such condition that it will deliver the manufacturer's rated compactive effort. If inadequate densities are obtained, larger and/or different types of additional equipment shall be provided by the Contractor. Hand-operated equipment shall be capable of achieving the specified densities.

2.05 MOISTURE CONTROL EQUIPMENT

A. Equipment for applying water shall be of a type and quality adequate for the work, shall not leak, and shall be equipped with a distributor bar or other approved device to assure uniform application. Equipment for mixing and drying out material shall consist of blades, discs, or other approved equipment.

3.01 CLEARING AND GRUBBING

A. Clearing and grubbing shall be done in accordance with Section 02130, CLEARING

AND GRUBBING.

3.02 EXCAVATION

A. General: Dewater the ground prior to starting excavation. Excavation is unclassified.

Excavation shall be performed to the lines, grades and elevations shown on the Drawings. The Engineer reserves the right to make minor adjustments or revisions in lines or grades. Perform all excavation regardless of the type, nature, or condition of the material encountered. The method of excavation used is optional. Existing and newly constructed structures shall be protected from damage during excavation.

Excavation that cannot be accomplished without endangering present or new structures shall be done with hand tools. The Contractor is responsible for field staking the earthwork. No excavation shall be started until the staking is complete.

Should the Contractor excavate below the designated lines through fault or negligence, the Contractor shall replace such unauthorized over-excavation with approved materials in an approved manner at his own expense.

B. Classification: All excavation shall be considered unclassified. All material encountered of whatever nature shall be removed and placed in the areas indicated on the Drawings or disposed of. The presence of rock or frozen material shall not constitute a claim by the Contractor for extra work.

C. Limits of Excavation: Excavation shall extend a sufficient distance from walls and footings to allow for placing and removal and inspection of forms. Temporary construction excavation side slopes shall be made as steep as safely possible.

Undercutting will not be permitted. Where suitable bearing is not encountered at the specified elevation, the Engineer may direct that additional depth as required be excavated. Such over-excavation shall be compensated for on a supplemental agreement or work order basis, if not specifically provided for in the Bid Form.

Unauthorized over-excavation by the Contractor shall be corrected by the Contractor using approved materials as specified hereinbefore at no cost to the Owner. Over-

02220 - 7 excavation shall be replaced with structural fill materials or imported structural fill, thoroughly compacted to not less than 95 percent of maximum density, (ASTM D 698), to the subgrade elevation.

D. Protection of Excavation: All necessary bailing, drainage, sheeting, and construction of cribs and cofferdams shall be included as part of the excavation. Excavations over four feet in depth shall be shored, sheeted and braced as may be necessary for the protection of the work and the safety of the personnel, or sloped to the angle of repose of the material when saturated per OSHA standards. When excavation is at the required depth, any water, if present, shall be pumped out for cleaning and foundation bed inspection.

E. Dewatering of Excavation:

1. Perform in accordance with Section 02401 Dewatering.

F. Structure Shoring:

1. Where necessary due to site limitations and to maintain steep side slopes, the

Contractor shall shore the excavation for various structures. It shall be the Contractor’s responsibility to provide and maintain a reasonable and safe excavation for all phases of construction. In no case shall any excavation be made in such a manner so as to endanger or damage adjacent facilities or property adjacent to the site.

2. The Contractor shall design, install, and maintain all shoring. The type of shoring shall be the Contractor’s option. The shoring shall be designed and maintained so as to prevent any movement of soil which may cause damage to the adjacent facilities and property, damage or delay the work, or endanger life and health.

3. Shoring shall be designed and constructed to withstand soil and hydrostatic loadings, and appropriate equipment and surcharge loadings. Tie-backs and bracing shall be installed where required to prevent movement. Design of shoring shall incorporate the Contractor’s sequence of excavation and placement of lateral support elements. The Contractor shall repair, at his own expense, all damage resulting from failure to provide adequate support.

4. Shoring shall be removed in a manner which avoids damage to new or existing facilities or adjacent property. All voids left by removal of shoring shall be immediately filled.

G. Approval of Excavation by Engineer: Prior to the placing of concrete for footings, walls, or slabs the excavation shall be inspected and approved by the Engineer. No footing shall be placed until after the Engineer has approved the depth of the excavation and the character of the foundation material. Provide a minimum 12-inch thick layer of imported Engineered structural fill below all footings and slabs at bottom of excavations.

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H. Blasting: Blasting for excavations will not be permitted.

I. Overbreak: Overbreak, including slides, is defined as that portion of any material displaced or loosened beyond the finished work as designed by the Engineer. The Contractor shall remove such overbreak and shall replace such overbreak with approved material in an approved manner. The additional work will be accomplished at no additional expense to the Owner.

3.03 BACKFILLING AT STRUCTURES

A. General: Backfilling shall be performed where indicated or required, to the grades and elevations shown on the Drawings. No backfilling shall be commenced without approval of the Engineer. Prior to backfilling, all concrete forms shall be removed and the excavation cleaned of all trash and debris. Any paint, insulation, waterproofing or coating which has been applied to below grade surfaces shall be completely dried or cured. Backfill around concrete structures only after the concrete has reached the specified compressive strength indicated in Section 03300, CAST-IN-PLACE CONCRETE. All material used for backfill shall be as specified and of a quality acceptable to the Engineer and shall be free of large and frozen lumps, wood, and other extraneous materials. In general, this material shall be structural fill material. No placement of fill or backfill shall be conducted over frozen subgrade.

B. Compaction: Backfill material shall be placed in continuous horizontal layers not to exceed 8-inches in loose lift thickness. Each layer shall be compacted as specified hereinafter. Where backfill is placed on both sides of a wall, both sides shall be backfilled in such a manner so that the difference in compacted grade does not exceed 18 inches at any time. Care shall be taken when compacting around structure footings, slabs, and walls to prevent damage to the structure.

C. Watering: Water may be added only to bring the backfill material to the specified moisture content range (plus or minus 3 percent from optimum) for compaction.

Jetting or ponding of the backfill material will not be permitted.

D. Backfill: Do not exceed loose lifts of 8 inches. Compact each lift to not less than 95 percent of maximum ASTM D698 dry density at optimum moisture content, plus or minus 3 percentage points. Moisten material as required to aid compaction. Place material in horizontal lifts and in a manner which avoids segregation. Gravel fill shall be compacted with compactors, suitable for such material, to the satisfaction of the Engineer. Sand fills will not be permitted.

E. Structural Fill Below Structures: Where called for on the Drawings or as otherwise specified herein or directed by the Engineer, provide hereinbefore specified structural fill for foundation preparation. Place fill material in maximum 8-inch thick loose lifts and compact each lift.

F. Any subsequent damage to slabs, piping, concrete structures, facilities, or other structures caused by settlement of fill material shall be corrected and repaired by the Contractor at the Contractor's sole expense.

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3.04 MOISTURE CONTROL

A. During all compacting operations, maintain at each lift of fill optimum practicable moisture content. Maintain moisture content uniform throughout the lift. Insofar as practicable, add water to the material at the site of excavation. Supplement, if required, by sprinkling and mixing the fill.