Bid Notice-2026 SB1 RMRA Roads Projects.pdf

Company Name:

Total Bid Amount:

ALPINE COUNTY

2026 SB1 RMRA ROAD PROJECTS

REQUEST FOR BIDS

This entire Bid Package includes the following: Notice Inviting Bids, Table of Contents, Proposal Form Summary, Project Specifications, Proposal Form, Designation of

Subcontractors, Experience, and Financial Qualifications, Bidder’s Statement of Past Contract Disqualifications, Bidder’s Bond, Notice of Award, Alpine County Standard

Contract, Bond for Faithful Performance, Bond for Material, Men, and Laborers, Notice to

Proceed, Release on Contract, Special Provisions, and Project Plans

Bid must be submitted in its entirety. Do not remove any pages.

Be sure to fully complete all forms and sign.

BIDS DUE BY 1:59 P.M. LOCAL TIME ON MONDAY, JULY 6TH, 2026

TABLE OF CONTENTS

NOTICE INVITING BIDS

PROPOSAL FORM SUMMARY

PROJECT SPECIFICATIONS

PROPOSAL FORM

DESIGNATION OF SUBCONTRACTORS, EXPERIENCE, & FINANCIAL QUALIFICATIONS

BIDDERS STATEMENT OF PAST CONTRACT DISQUALIFICATIONS

BIDDER’S BOND

NOTICE OF AWARD

ALPINE COUNTY STANDARD CONTRACT

BOND FOR FAITHFUL PERFORMANCE

BOND FOR MATERIAL, MEN, AND LABORERS

NOTICE TO PROCEED

RELEASE ON CONTRACT

SPECIAL PROVISIONS

PROJECT PLANS

ALPINE COUNTY

NOTICE INVITING FORMAL BIDS

Alpine County Community Development is seeking bids from qualified contractors for the repair and maintenance of Spring Cliff Road and Mule Ear Road in Bear Valley, CA. This is a public project and is therefore subject to California prevailing wage regulations and requirements.

Sealed bids will be received at the Alpine County Community Clerk’s Office, 99 Water St., Markleeville, CA 96120.

Submissions must be received before the bid opening time and date, in a sealed envelope. Indicate on the outside of the envelope, “2026 SB1 RMRA ROAD PROJECTS”

No other forms of submittal shall be accepted by Alpine County. All proposals must be signed with the firm’s name and by a responsible officer or employee.

Schedule Bid Documents Available: On or before 5:00 P.M. Local Time, Friday, June 12, 2026

Optional Pre-bid Meeting: Monday, June 22nd, 2026 at 11:00 A.M. Local Time (Location: Alpine County Sheriff’s Department, 88 Bear Valley Road, Bear Valley, CA 95223)

Bids Due: Monday, July 6th, 2026 at 1:59 P.M. Local Time

Bid Opening: Monday, July 6th, 2026 at 2:00 P.M. Local Time (Location: Board of Supervisors

Chambers at 99 Water St., Markleeville, CA 96120)

Tentative Contract Award/Execution by Board of Supervisors: Tuesday, July 21, 2026 (Board of Supervisor’s Meeting)

Other Information No charge for delivery, shipping, parcel post, packing, insurance, license fees, permits or for any other purpose will be paid by the County of Alpine unless expressly included and itemized in the bid.

Bid packages will be available on or before Friday, June 12, 2026, and may be downloaded from the

County website at: https://www.alpinecountyca.gov/bids.aspx

Please be aware that if you download the Bid Package from the County website, you are responsible for notifying Ethan Gray, Community Development, Deputy Director at egray@alpinecountyca.gov that you are a Bid Package recipient. Only Bid Package recipients known by the County will receive any addenda that are issued.

Inquiries regarding this bid may be received by Ethan Gray, Community Development Deputy

Director, at egray@alpinecountyca.gov until Wednesday, June 24, 2026, at 5:00 P.M. Local Time.

All questions shall be responded to via an addendum issued no later than 5:00 P.M. Local Time on Friday, June 26, 2026.

Please include any requested amendments to the County’s Standard Contract in your proposal.

PROPOSAL FORM SUMMARY

(To be submitted with sealed bid)

Project Name: 2026 SB1 RMRA ROAD PROJECTS

Bidder’s Legal Name:

Bidder’s Address:

Contact Person:

Phone:

Email:

TOTAL BID AMOUNT

Total Bid Amount (in words):

Total Bid Amount (in numbers):

Base Bid: $ (Please also include on title page of Bid Package)

I hereby certify that the amount stated above represents the total bid for the complete scope of work as outlined in the contract documents, inclusive of all labor, materials, equipment, taxes, overhead, profit, and any other costs.

Authorized Representative’s Name (print):

Title:

Signature:

Date:

Alpine County Community Development

50 Diamond Valley Rd.

Markleeville, CA 96120

Project Specifications for the

2026 SB1 RMRA ROAD PROJECTS

June 2026

Prepared by:

Lumos & Associates, Inc.

950 Sandhill Road, Suite 100

Reno, NV 89521

Phone (775) 827-6111

06/12/26

2026 SB1 RMRA ROAD PROJECTS

TECHNICAL SPECIFICATIONS

Table of Contents

DIVISION 1 – GENERAL REQUIREMENTS

01 45 23 TESTING AND INSPECTION SERVICES

01 55 26 TRAFFIC CONTROL

01 57 13 TEMPORARY EROSION CONTROL

01 73 29 CUTTING AND PATCHING

DIVISION 31 – EARTHWORK

31 01 00 EARTHWORK

31 11 00 SITE CLEARING

31 23 16 EXCAVATION

31 23 23 TRENCHING AND BACKFILLING

31 37 00 RIPRAP

DIVISION 32 – EXTERIOR IMPROVEMENTS

32 11 23 AGGREGATE BASE

32 12 26 ASPHALT PAVING

Technical Specifications

Section 01 45 23

TESTING AND INSPECTION SERVICES

PART 1 – GENERAL

1.1 DESCRIPTION

A. This section includes administrative and procedural requirements for testing laboratory services for inspections, tests, and related actions, including reports prepared by Contractor, by independent agencies, and by governing authorities. Contract enforcement activities performed by Engineer are not included.

1.2 TESTING LABORATORY

A. General: Owner will employ and pay for services of an independent testing laboratory to perform specified testing. Testing laboratory shall be approved by the Engineer.

B. Coordination: Coordinate the sequence of activities to accommodate required services with a minimum of delay. Coordinate activities to avoid the necessity of removing and replacing construction to accommodate inspections and tests. The Contractor is responsible for scheduling times for inspections, tests, taking samples, and similar activities.

C. Cooperation: Cooperate with laboratory to facilitate required services.

D. Performance of Work: Employment of laboratory shall not relieve Contractor's obligations to perform work of Contract.

1.3 INSPECTION SERVICES

A. Inspection will be provided by the County in accordance with the GENERAL CONDITIONS.

1.4 REQUIREMENTS

A. Conditions of the Contract: Inspections and testing required by laws, ordinances, rules, regulations, orders or approvals of public authorities.

B. Respective Sections of the Specifications: Certification of products.

C. Listed Specification Sections: Laboratory tests required and standards for testing.

D. Testing Laboratory Inspection, Sampling and Testing is required for:

1. Asphalt Paving: Section 32 12 26 - ASPHALT PAVING.

PART 2 -PRODUCTS

1.1 SUBMITTALS

A. Testing Laboratory: Submit electronic copy (pdf) of certified written report, of each inspection, test, or similar service.

PART 3 -EXECUTION

3.1 LABORATORY DUTIES

A. General: Comply with ASTM E329 "Standard Specification for Agencies Engaged in Construction

Inspection, Testing or Special Inspection".

B. Cooperation: Cooperate with Engineer and Contractor; provide qualified personnel after due notice.

C. Services:

1. General: Perform specified inspections, sampling and testing of materials and methods of construction.

2. Specified Standards: Verify compliance.

3. Specified Materials: Ascertain compliance with requirements of Contract Documents.

D. Notification: Promptly inform Engineer of observed irregularities or deficiencies of work or products.

E. Reports: Submit as required.

F. Additional Testing: Perform additional tests as required by Engineer or Owner.

3.2 LIMITATIONS OF AUTHORITY OF TESTING LABORATORY

A. Laboratory is not authorized to release, revoke, alter or enlarge on requirements of Contract Documents, or perform any construction duties of Contractor.

3.3 A.

CONTRACTOR'S RESPONSIBILITIES

Cooperation:

1. Scheduling: Notify laboratory sufficiently in advance of operations, as specified under individual

Sections of the specifications, to allow laboratory to schedule tests and assign personnel. When tests or inspections cannot be performed after such notice, reimburse Owner for laboratory personnel and travel expenses incurred.

2. Laboratory Personnel: Cooperate with, provide access to Work, and to manufacturer's operations.

3. Inspector: Cooperate with Inspector to secure and deliver to laboratory adequate quantities of representative samples of materials proposed for use and that require testing.

B. Manufacturer’s Test Reports: Furnish copies of product test reports as required.

C. Incidental Labor and Facilities: Provide access to Work to be tested; facilitate inspections and tests.

D. Additional Testing: Paid for by Owner and back charged to Contractor as specified in the individual sections.

E. Repair and Protection: Upon completion of inspection, testing, sample taking and similar services, repair damaged construction and restore substrates and finishes. Refer to Section 01 73 29 -

CUTTING AND PATCHING.

Section 01 55 26

TRAFFIC CONTROL

PART 1 – GENERAL

1.2

A.

SCOPE OF WORK

General: Temporary traffic control, including flagging, apparel, temporary traffic control devices, and equipment for flaggers must comply with the California MUTCD, Part 6, “Temporary Traffic Control.”

The Contractor shall provide the following, but not limited to:

1. Temporary traffic control devices.

2. Temporary traffic control equipment.

3. Apparel.

4. Flaggers.

1.3 A.

QUALITY ASSURANCE

General: Comply with governing codes and regulations for public safety.

PART 2 – PRODUCTS

2.1 MATERIALS

A. CALTRANS approved products.

PART 3 – EXECUTION

3.1 LANE RESTRICTIONS AND CLOSURES

A. The contractor will be allowed to maintain one-way traffic flows provided vehicle flows are not excessive and wait times are no longer than 10 minutes for first vehicle in queue between the hours 7AM and 8PM.

B. A pre-job meeting is required to discuss the work and traffic control methods. Complete traffic control and staging plans are required. Work shall not commence until the traffic control plan and staging plans have been approved by the Engineer.

C. If deviations from the approved traffic control plans are required, a written request shall be submitted to the Engineer at least 5 days before the proposed revisions are to be implemented.

The Engineer may approve the deviations if there is no significant increase in the cost to the

County and if the work can be expedited and better serve the public traffic.

D. Local authorities (e.g., Alpine County Sheriff’s Office, emergency and ambulance services, etc.)

shall be notified by the Contractor at least 5 business days before work begins. The Contractor shall cooperate with local authorities to handle traffic through the work area and shall make arrangements to keep the work area clear of parked vehicles. Personal vehicles of the

Contractor's employees shall not be parked on the traveled way or shoulders including sections closed to public traffic.

E. Access to residences and other public and private properties must be maintained. At least 72 hours in advance of starting any work that may affect the access to private properties, the

Contractor shall provide written notice to such property owners. Access to and from driveways and parking lots may be temporarily restricted when performing items of work which cannot be accomplished without access restriction. Full driveway access shall be provided during non-working hours.

F. The Contractor shall provide safe access for pedestrians and bicyclists at all times through the work areas.

3.2 TEMPORARY TRAFFIC CONTROL PLANS:

A. The contractor shall be responsible for preparing detailed temporary traffic control plans demonstrating adherence to the General Conditions section of these provisions. Plans shall be prepared for each construction stage through completion of the project. All traffic control barricades, signs, devices and personnel used by the Contractor shall, as a minimum, conform to the current editions of Part 6 of the Manual on Uniform Traffic Control Devices (MUTCD) California Supplement. Plans shall be prepared by a California Registered Professional Engineer, or a Certified ATSSA Traffic Control Supervisor, knowledgeable and experienced in the preparation of traffic control and staging plans.

B. Temporary traffic control and staging plans for all work stages shall be submitted to the Engineer for approval prior to beginning any work.

3.3 CONSTRUCTION AREA TRAFFIC CONTROL DEVICES

A. Flagging, signs, and temporary traffic control devices furnished, installed, maintained, and removed when no longer required shall conform to the provisions in Section 12, "Construction

Area Traffic Control Devices," of the Standard Specifications and these special provisions.

1. Category 1 temporary traffic control devices are defined as small and lightweight (less than

100 pounds) devices. These devices shall be certified as crashworthy by crash testing, crash testing of similar devices, or years of demonstrable safe performance. Category 1 temporary traffic control devices include traffic cones, plastic drums, portable delineators, and channelizers.

2. Category 2 temporary traffic control devices are defined as small and lightweight (less than

100 pounds) devices that are not expected to produce significant vehicular velocity change, but may cause potential harm to impacting vehicles. Category 2 temporary traffic control devices include barricades and portable sign supports.

a. Category 2 temporary traffic control devices shall be on the Federal Highway

Administration's (FHWA) list of Acceptable Crashworthy Category 2 Hardware for Work

Zones. This list is maintained by FHWA and can be located at:

http://safefty.fhwa.dot.gov/roadway dept/policy guide/road hardware/listing.cfm?code=workzone

b. Category 2 temporary traffic control devices that have not received FHWA acceptance shall not be used. Category 2 temporary traffic control devices in use that have received FHWA acceptance shall be labeled with the FHWA acceptance letter number and the name of the manufacturer. The label shall be readable and permanently affixed by the manufacturer. Category 2 temporary traffic control devices without a label shall not be used.

3. Category 3 temporary traffic control devices consist of temporary traffic handling equipment and devices that weigh 100 pounds or more and are expected to produce significant vehicular velocity change to impacting vehicles. Temporary traffic handling equipment and devices include crash cushions, truck mounted attenuators, temporary railing, temporary barrier, and end treatments for temporary railing and barrier.

a. Type III barricades may be used as sign supports if the barricades have been successfully crash tested, meeting the NCHRP Report 350 criteria, as one unit with a construction area sign attached.

b. Category 3 temporary traffic control devices shall be shown on the plans or on the

Department's Highway Safety Features list. This list is maintained by the Division of Engineering Services and can be found at:

http://www.dot.ca.gov/hq/esc/approvedproductslist

c. Category 3 temporary traffic control devices that are not shown on the plans or not listed on the Department's Highway Safety Features list shall not be used.

3.4 CONSTRUCTION AREA SIGNS

A. Construction area signs for temporary traffic control shall be furnished, installed, maintained, and removed when no longer required in conformance with the provisions in Section 12, "Temporary Traffic Control," of the Standard Specifications and these special provisions.

A. Six (6) construction area signs are required (i.e., two signs located on each end of the project). Three (3) signs shall be “Road Construction Ahead”, C-18, metal 48”X48”, mounted on wooded posts; Three (3) signs shall be “End Roadwork”, C-14, metal 42”X18”, mounted on wooden posts.

B. Attention is directed to the provisions in "Prequalified and Tested Signing and Delineation Materials" of these special provisions. Type II retroreflective sheeting shall not be used on construction area sign panels. Type III, IV, VII, VIII, or IX retroreflective sheeting shall be used for stationary mounted construction area sign panels.

C. Unless otherwise shown on the plans or specified in these special provisions, the color of construction area warning and guide signs shall have black legend and border on orange background (orange background on construction area signs shall be fluorescent orange).

D. Repairs to construction area sign panels will not be allowed, except when approved by the

Engineer. At nighttime under vehicular headlight illumination, sign panels that exhibit irregular luminance, shadowing or dark blotches shall be immediately replaced at the Contractor's expense.

E. Construction area signs placed within 15 feet from the edge of the travel way should be mounted on stationary mounted sign supports.

F. The Contractor shall maintain accurate information on construction area signs. Signs that are no longer required shall be immediately covered or removed. Signs that convey inaccurate information shall be immediately replaced or the information shall be corrected. Covers shall be replaced when they no longer cover the signs properly. The Contractor shall immediately restore to the original position and location any sign that is displaced or overturned, from any cause, during the progress of work.

01 57 13 TEMPORARY EROSION CONTROL

Section 01 57 13

TEMPORARY EROSION CONTROL

1.1 SCOPE OF WORK

A. General: Provide all materials, equipment and labor necessary to furnish and install BMPs and required maintenance as shown on the Drawings.

The Contractor shall provide the following, but not limited to:

1. Cut and fill operations.

2. Temporary stockpiles.

3. Vehicle and equipment storage, maintenance and fueling operations.

4. Dust control.

5. Tracking of dirt, mud on off-site streets.

6. Appropriate erosion controls measures.

1.2 QUALITY ASSURANCE

A. General: Comply with governing codes and regulations.

A. Fiber Rolls: Shall be new manufactured fiber rolls a minimum of 9-inches in diameter.

B. Gravel bag: Shall be a woven geotextile fabric with typical dimensions of 18” x 12” x 6” and filled with clean, washed gravel.

C. Silt Fence: Shall be woven polypropylene with a minimum width of 36 inches and a minimum tensile strength of 100 lb force.

3.1 INSTALLATION

A. Fiber Rolls: Shall be installed per the drawings.

B. Gravel Bags: Gravel bags shall be used to construct berms as shown on the plans.

C. Silt Fence: Silt fence shall be installed per the drawings.

3.2 MAINTENANCE AND REMOVAL

A. General: Maintain and repair existing and new erosion control facilities throughout the construction period. Remove silt build up at fiber rolls and/or silt fences as needed. Repair damage to earth slopes and banks. Erosion control measures shall be left in place until final paving is complete.

B. Cleaning: Keep area clean of debris.

C. Remove erosion control measures prior to demobilizing.

01 73 29 CUTTING AND PATHCING

Section 01 73 29

CUTTING AND PATCHING

PART 1 - GENERAL

1.1 DESCRIPTION

A. Provide all cutting and patching in neat, clean lines to accomplish the work.

B. Defective Work: Remove and replace defective and non-conforming work.

1.2 SUBMITTALS

A. Cutting and/or Alteration Request:

1. General: Submit written request to the Engineer in advance of executing any cutting or alteration to affected items as listed below.

2. Affected Items: Work process of the Owner or any separate contractor; structural value or integrity of any element of the Project; integrity or effectiveness of weather-exposed or moisture-resistant elements or systems; efficiency, life, maintenance or safety of operational elements;

visual qualities of sight-exposed elements.

3. Request Requirements: Project name and location; description of all affected work; explanation of necessity for cutting, alteration or excavation; impact on the work of the Owner or any separate contractor; description of proposed work, including scope of cutting, patching, alteration, or excavation, products proposed to be used, trades who will complete the work, and extent of refinishing to be done; alternatives to cutting and patching; cost proposal, when applicable; written permission from any separate contractor whose work will be affected.

PART 2 - PRODUCTS

A. Comply with requirements of individual sections of these Specifications for replacement of

Work removed and type of work to be done.

PART 3 - EXECUTION

3.1 INSPECTION

A. General: Inspect existing conditions; include elements subject to damage or movement during cutting and patching.

B. After Uncovering Work: Inspect conditions affecting the installation of products, or performance of Work.

C. Unsatisfactory Conditions: Report unsatisfactory or questionable conditions to the Engineer in writing; do not proceed with work until Engineer has provided further instructions.

3.2 PREPARATION

A. Temporary Support: Provide as necessary to assure structural value or integrity of affected portion of Work.

B. Protection:

1. General: Provide devices and methods to protect other portions of the Project from damage.

2. Environmental Protection: Provide protection from elements for that portion of the Project which may be exposed by cutting and patching, and maintain excavations free from water.

3.3 PERFORMANCE

A. Excavation and Backfill: Execute excavating and backfilling by methods which will prevent settlement or damage to other work per Section 31 01 00 - EARTHWORK.

B. Cutting and Patching: Perform work with workers skilled in the trades involved. Make patches, seams and joints durable and inconspicuous.

01 73 29 CUTTING AND PATHCING

C. Adjustment: Execute fitting and adjustment of products to provide a finished installation complying with specified products, functions, tolerances and finishes.

D. Fitting: Fit work airtight to culvert and other penetrations through surfaces.

Section 31 01 00

EARTHWORK

1.1 INCLUSION OF OTHER CONTRACT DOCUMENTS

A. The General Conditions, Supplementary Conditions and Division 1 are fully applicable to this

Section, as if repeated herein.

1.2 RELATED WORK SPECIFIED ELSEWHERE

A. Section 01 57 13 – TEMPORARY EROSION CONTROL.

B. Section 31 23 23 – TRENCHING AND BACKFILLING.

1.3 QUALITY ASSURANCE

A. Use only new materials and products, unless existing materials or products are specifically shown otherwise on the Drawings to be salvaged and re-used.

B. All materials, components, assemblies, workmanship and installation are to be observed by the

Owner's Inspector of Record. Work not so inspected is subject to uncovering and replacement.

C. The representatives of the Owner’s testing lab will not act as supervisor of construction, nor will they direct construction operations. Neither the presence of the Owner’s testing lab representatives nor the testing by the Owner’s testing lab shall excuse the contractors or subcontractors for defects discovered in their work during or following completion of the project.

Correcting of inadequate compaction or moisture content is the sole responsibility of the contractor.

D. Tests (See Part 3 for Compaction Testing).

E. Contractor shall be solely responsible for all subgrades built. Failures resulting from inadequate compaction or moisture content are the responsibility of the contractor. Contractor shall be solely responsible for any and all repairs.

1.4 REFERENCES AND STANDARDS

A. Site Visitation: All bidders interfacing with existing conditions shall visit the site prior to bid to verify general conditions of improvements. Discrepancies must be reported prior to the bid for clarification.

B. ANSI/ASTM D698-00 - Test Methods for Moisture-Density Relations of Soils and Soil-

Aggregate Mixtures, Using 5.5 lb. (2.49 Kg) Rammer and 12 inch (304.8 mm) Drop.

C. ANSI/ASTM D1556-00 - Test Method for Density of Soil in Place by the Sand-Cone Method.

D. ANSI/ASTM D1557-02e2 - Test Methods for Moisture-Density Relations of Soils and Soil-

Aggregate Mixtures Using 10 lb. (4.54 Kg) Rammer and 18 inch (457 mm) Drop.

E. ANSI/ASTM D 3017-05 Test Methods for Moisture Content of Soils and Soil-Aggregate Mixture by Nuclear Methods (Shallow Depth).

F. ANSI/ASTM D 422-63(2007) E1 Test Method for Particle Size Analysis of Soil.

G. ANSI/ASTM D 4318-05 Test Method for Liquid Limit, Plastic Limit, and Plasticity Limit.

H. CALTRANS Standard Specifications Section 17.

I. CAL-OSHA, Title 8, Section 1590 (e).

J. Any work within the street, highway or right-of-way shall be performed in accordance with the requirement of the governmental agencies having jurisdiction, and shall not begin until all of those governing authorities have been notified.

1.5 DELIVERY, STORAGE AND HANDLING

A. Transport, store and handle in strict accord with the local jurisdiction.

B. Make delivery to job when notified by Contractor verifying that the job is ready to receive the work of this Section and that arrangements have been made to properly store, handle and protect such materials and work.

1.6 PROJECT CONDITIONS

A. Existing civil improvements are shown on respective site plans to the extent known. Should the

Contractor encounter any deviation between actual conditions and those shown, he is to immediately notify the Engineer before continuing work.

B. Excavation dewatering may be necessary. Contractor shall provide any and all tools, equipment and labor necessary for excavation dewatering no matter what the source.

1.7 PROTECTION

A. Adequate protection measures shall be provided to protect workmen and passers-by on and off the site. Adjacent property shall be fully protected throughout the operations. Blasting will not be permitted. Prevent damage to adjoining improvements and properties both above and below grade. Restore such improvements to original condition should damage occur.

B. In accordance with generally accepted construction practices, the Contractor shall be solely and completely responsible for working conditions at the job site, including safety of all persons and property during performance of the work. This requirement shall apply continuously and shall not be limited to normal working hours.

C. Any construction review of the Contractor's performance conducted by the Engineer is not intended to include review of the adequacy of the Contractor's safety measures, in, on, or near the construction site.

D. Surface Drainage: Provide for surface drainage during period of construction in manner to avoid creating nuisance to adjacent areas. The Contractor shall make a reasonable effort on a daily basis to keep all excavations and the site free from water during entire progress of work, regardless of cause, source, or nature of water.

E. Adjacent streets shall be kept free of mud, dirt or similar nuisances resulting from earthwork operations.

F. The site and adjacent influenced areas shall be watered as required to suppress dust nuisance. Dust control measures shall be in accordance with the local jurisdiction.

G. Trees: Carefully protect existing trees that are to remain.

1.8 ENVIRONMENTAL PROTECTION

A. No ground-disturbing activities shall be allowed outside of the project construction boundary.

Construction fencing shall be placed at the boundary of the project site to clearly mark the limits of ground-disturbing activities.

B. All project-related traffic shall be restricted to designated access roads, routes, and construction areas within the project boundary. No vehicular or pedestrian traffic shall be allowed outside the designated project boundary.

C. To prevent sediment, hazardous materials, and other pollutants from washing or running off into the existing swale and channel outside of the project site, the contractor shall implement best management practices as identified in the drawings.

D. Contractor to avoid and protect all protected species.

1.9 SEASONAL LIMITS

A. No fill material shall be placed, spread or rolled during unfavorable weather conditions. When work is interrupted by rains, fill operations shall not be resumed until field tests indicate that moisture content and density of fill are satisfactory.

B. Excessively wet fill material shall be bladed and aerated per section 3.6, B.

1.10 TESTING

A. General: Refer to Section 01 45 23 – TESTING AND INSPECTION SERVICES.

B. Engineer: Owner is retaining an Engineer to determine compliance of fill with Specifications, and to direct adjustments in fill operations. Costs of Engineer will be borne by Owner; except those costs incurred for re-tests or re-inspection will be paid by Owner and back charged to

Contractor.

1. If Contractor elects to process or mine onsite materials for use as Suitable Fill, Aggregate Sub

Base, Aggregate Base, Rock, Crushed Rock or sand the cost of all testing of this material shall be paid for by the Contractor.

A. Engineered Fill Materials: All fill shall be of approved local materials supplemented by imported fill if necessary. "Approved" local materials are defined as local soils tested and approved by the Engineer free from debris, and concentrations of clay and organics; and contain rocks no larger than 3- inches in greatest dimension. The soil and rock should be thoroughly blended so that all rock is surrounded by soil. This may require mixing of the soil and rock with a dozer prior to placement and compaction. Clods, rocks, hard lumps or cobbles exceeding 3-inches in final size shall not be allowed in the upper 24 inches of any fill. Native clay or clayey soils will not be permitted within the upper 24 inches of building pad areas or paved areas.

B. Water: Furnish all required water for construction purposes, including compaction and dust control. Water shall be potable.

C. Aggregate Base: Provide Class 2 3/4” Aggregate Base conforming to standard gradation as specified in Caltrans Standard Specifications, Section 26.

D. Backfill: Provide Class E Backfill conforming to Caltrans Standard Specifications, Section 19.

3.1 INSPECTION LAYOUT AND PREPARATION

A. Prior to installation of the work of this Section, carefully inspect and verify by field measurements that installed work of all other trades is complete to the point where this installation may properly commence

B. Layout all work, establish grades, locate existing underground utilities, set markers and stakes, setup and maintain barricades and protection facilities; all prior to beginning actual earthwork operations. Layout and staking shall be done by a licensed Land Surveyor or Professional Civil

Engineer.

C. Verify that specified items may be installed in accordance with the approved design.

D. In event of discrepancy, immediately notify Owner and the Engineer. Do not proceed in discrepant areas until discrepancies have been fully resolved.

3.2 PERFORMANCE

A. General: Do all grading, excavating and cutting necessary to conform finish grade and contours as shown. All cuts shall be made to true surface of subgrade.

B. Archaeological Artifacts: Should any artifacts of possible historic interest be encountered during earthwork operations, halt all work in area of discovery and immediately contact the Architect for notification of appropriate authorities.

C. Degree of Compaction: Percentage of maximum density, hereinafter specified as degree of compaction required, means density equivalent to that percentage of maximum dry density determined by ASTM D1557 Compaction Test method, and such expressed percentage thereof will be minimum acceptable compaction for specified work.

D. Moisture Content: Moisture content shall be as noted below and as called for on the plans.

Moisture content shall be maintained until subgrade is covered by surfacing materials.

3.3 TESTING AND OBSERVATION

A. All grading and earthwork operations shall be observed by the Engineer or his representative, serving as the representative of the Owner.

B. Field compaction tests shall be made by the Engineer or his representative. If moisture content and/or compaction are not satisfactory, Contractor will be required to change equipment or procedure or both, as required to obtain specified moisture or compaction. Notify Engineer at least 48 hours in advance of any filling operation.

C. Earthwork shall not be performed without the notification or approval of the Engineer or his representative. The Contractor shall notify the Engineer at least two (2) working days prior to commencement of any aspect of the site earthwork.

D. If the Contractor should fail to meet the compaction or design requirements embodied in this document and on the applicable plans, he shall make the necessary readjustments until all work is deemed satisfactory, as determined by the Engineer.

E. After each rain event Engineer may test fill material for optimum moisture. Do not place any fill material until desired moisture is achieved.

3.4 CLEARING AND GRUBBING

A. Prior to grading, remove all debris off-site. Remove brush including the root systems. Holes resulting from brush removal should be prepared and backfilled in accordance with this specification. This may require deepening and/or widening the holes to adequately remove disturbed soil and provide room for compaction equipment. Strip the surface of all organics.

3.5 CUTTING

A. Do all cutting necessary to bring finish grade to elevations shown on Drawings.

B. When excavation through roots is necessary, cut roots by hand.

3.6 SUBGRADE PREPARATION

A. Grade compact and finish all subgrades within a tolerance of 0.10' of grades as indicated on

Drawings and so as not to pool water.

B. After clearing, grubbing and cutting, subsurface shall be plowed or scarified to a depth of at least 12", until surface is free from ruts, hummocks or other uneven features and uniform and free from large clods. Moisture condition to optimum moisture content and recompact to at least 95% of the maximum dry density as determined by ASTM Test Method D1557. If the existing soils are at a water content higher than specified, the contractor shall provide multiple daily aerations by ripping, blading, and/or disking to dry the soils to a moisture content where the specified degree of compaction can be achieved. After seven consecutive working days of daily aerations, and the moisture content of the soil remains higher than specified, the contractor shall notify the Engineer. If the existing soils have a moisture content lower than specified, the contractor shall scarify, rip, water and blade existing soil to achieve specified moisture content. The contractor shall make proper allowance in schedule and methods to complete this work.

3.7 FINAL SUBGRADE COMPACTION

A. Fill and Backfill: Upper 12” of all other final subgrades or finish grades shall be compacted to

95% of maximum dry density.

B. Project Inspector must verify that materials are uniformly spread to minimum depth specified.

3.8 FINISH GRADING

A. At completion of project, site shall be finished graded, as indicated on Drawings. Finish grades shall be “flat graded” to grades shown on the drawing. Mounding of finish grades will not be allowed unless otherwise directed on the landscape drawings. Tie in new and existing finish grades.

3.9 SURPLUS MATERIAL

A. Excavated material not required for grading or backfill shall be removed from site at contractor’s expense.

3.10 CLEANING

A. Remove from fill all vegetation, wood, form lumber, and debris in contact with ground; buried wood will not be permitted in any fill.

31 11 00 SITE CLEARING

Section 31 11 00

SITE CLEARING

PART 1- GENERAL

A. Clearing: Clearing shall consist of the felling, trimming and cutting into sections, vegetation not designated to remain, brush, fences, concrete, asphalt and rubbish occurring within the areas to be cleared. Remove root system of trees, stumps, brush and vegetation in areas to be cleared, except for trees and vegetation indicated or directed to be left standing.

B. Disposal of Cleared Materials: All cleared material will become the property of the Contractor and will be disposed of off-site, or as specified by the Engineer, or as required by the State of

California, including the removal and disposal of all the resulting material.

1.2 PROTECTION:

A. Roads and Walks: Keep roads and walks, designated to remain, free of dirt and debris at all times.

B. Utility Lines: Protect from damage all existing utility lines. Notify the Engineer and Owner immediately of any damage to or encounter with an unknown existing utility line. The

Contractor shall be responsible for the repair of any damage to existing utility lines.

C. Blasting: The use of explosives will not be permitted.

2.1 MATERIALS: None

3.1 GENERAL

A. The project site will be cleared by the Contractor prior to the start of work. Any minor clearing that may be required shall be completed as herein specified.

31 23 16 EXCAVATION

Section 31 23 16

EXCAVATION

A. This section includes requirements for excavation, preparation of pipe-laying surface, pipe bedding, backfilling and compaction.

1. Referenced Standard Specifications: Materials and workmanship specified herein with reference to Standard Specifications for Public Works Construction shall be in accordance with the referenced articles, sections, and paragraphs of the standard except that contractual and payment provisions do not apply. Where the term "Engineer" is used, it shall mean the

Engineer.

2. All work shall be performed in compliance with the applicable sections of the Standard

Specifications except as modified herein.

1.2 DEFINITIONS

A. Backfill: Material used in refilling a trench or other excavation.

B. Compaction: Any method of mechanically stabilizing a material by increasing its density at a controlled moisture condition. "Degree of Compaction" is expressed as a percentage of the maximum density obtained by the test procedure described in ASTM D 1557 for general soil types or ASTM D 4254 for isolated cohesionless materials, abbreviated in this specification as "95 percent ASTM D 1557 maximum density."

C. Granular Pipe Bedding: A dense, well-graded aggregate mixture of sand, gravel, or crushed stone (mixed individually, in combination with each other, or with suitable binder soil) placed on a subgrade to provide a suitable foundation for pipe.

D. Hard Material: Weathered rock, dense consolidated deposits, or conglomerate materials which are not included in the definition of "rock" but which usually require the use of heavy excavation equipment, ripper teeth, or jack hammers for removal.

E. Lift: A layer or course of soil placed on top of unprepared subgrade or a previously prepared or placed soil in a fill or backfill.

F. Unsatisfactory Material: Soil or other material identified as having insufficient strength or stability to carry intended loads on trench backfills without excessive consolidation or loss of stability. Also backfill material which contains refuse, frozen material, large rocks, debris, and other material which could damage the pipe or cause the backfill not to compact. Materials classified as PT, OH, or OL by ASTM D 2487 are unsatisfactory.

G. Unstable Material: Material in the trench bottom which lacks firmness to maintain alignment and prevent joints from separating in the pipe, conduit, or appurtenance structure during backfilling. This may be material otherwise identified as satisfactory which has been disturbed or saturated.

1.3

SUBMITTALS:

A. Certified Test Reports: Test reports shall be submitted to the Engineer two weeks prior to construction.

1. Concrete

2. Trench Backfill Material

3. Pipe Bedding Material

B. Manufacturers Certificates of Compliance:

1. Warning and identification tape.

2. Submit any field test data not listed above sufficiently in advance of construction so as not to delay work.

1.4 DELIVERY AND STORAGE

A. Deliver and store materials in a manner to prevent contamination, segregation, freezing, and other damage.

1.5 PROTECTION:

A. Shoring and Sheeting: Provide shoring, bracing, trench boxes and sheeting as required.

1. Prevent undermining of pavements and slabs.

2. Prevent slippage or movement in banks or slopes adjacent to the excavation.

B. Utilities: Movement of construction machinery and equipment over pipes and utilities during construction shall be at the Contractor's risk. Excavation made with power-driven equipment is not permitted within two feet of any known government-owned utility or subsurface construction. For work immediately adjacent to or for excavations exposing a utility or other buried obstruction, use hand or light equipment excavation. Start hand or light equipment excavation on each side of the indicated obstruction and continue until the obstruction is uncovered or until clearance for the new grade is assured. Support uncovered lines or other existing work affected by the contract excavation until approval for backfill is granted by the

Engineer. Report damage to utility lines or subsurface construction immediately to the

Engineer.

C. Structures and Surfaces: Protect newly backfilled areas and adjacent structures, slopes, or grades from traffic, erosion settlement, or any other damage. Repair and re-establish damaged or eroded grades and slopes and restore surface construction prior to acceptance.

Protect existing streams, ditches, and storm drain inlets from water-borne soil by means of fiber rolls, filter fence, gravel bag berms or other BMPs approved by the Engineer. Dispose of excavated material so that it will not obstruct the flow of streams, endanger a partly finished structure, impair the efficiency or appearance of any facilities, or be detrimental to the completed work.

2.1 SOIL MATERIALS

A. Provide soil materials as described below free of debris, roots, wood, scrap material, vegetable matter, refuse, soft unsound particles, ice, or other deleterious and objectionable materials.

1. Backfill: Bring trenches outside paved areas to grade indicated on the drawings. Use granular material except around and up to 12 inches over pipe. No testing other than for compaction and visual approval by the Engineer will be required, except if a change in material source is proposed.

2. Special Backfill for Roads and Paved Areas: Backfill trenches under roads and paved areas as described in Section 31 01 00, "Earthwork." Use Class "E" backfill conforming to Caltrans Standard Specifications, Section 19. Soils must comply with grading requirements and may be verified by testing. Adjustment of natural moisture content (drying or wetting) may be necessary, or imported fill may be required.

3. Pipe Bedding Sand: Clean, sandy material, classified as SW or SP by ASTM D 2487, and meeting the requirements for Class A Backfill, Caltrans Specifications.

4. Gravel: Clean, coarsely graded natural gravel, crushed stone or a combination thereof identified as having a classification of GP in accordance with ASTM D 2487 for bedding and backfill.

Maximum particle size shall not exceed 2 inches.

3.1 SURFACE PREPARATION:

A. Cutting Pavement: Sawcut with neat, parallel, straight lines one foot wider than trench width on each side of trenches and one foot beyond each edge of pits.

3.2 GENERAL EXCAVATION

A. Keep excavations free from water while construction is in progress. Notify the Engineer immediately in writing if it becomes necessary to remove rock or hard, unstable, or otherwise unsatisfactory material to a depth greater than indicated. Make trench sides as nearly vertical as practicable except where sloping of sides is allowed. Sides of trenches shall not be sloped from the bottom of the trench up to the elevation of the top of the culvert. Excavate ledge rock, boulders, and other unyielding material to an over depth at least 6 inches below the bottom of the culvert and appurtenances unless otherwise indicated or specified. Blasting will not be permitted. Overexcavated soft, weak, or wet excavations. Use gravel placed in 6-inch-maximum layers to refill over depths to the proper grade. At the option of the Contractor, the excavations may be cut to an over depth of not less than 4 inches and refilled to required grade as specified. Grade bottom of trenches accurately to provide uniform bearing and support for each section of culvert structure on undisturbed soil, or bedding material as indicated or specified at every point along its entire length.

1. Shoring and Sheeting: Shore and sheet excavations as appropriate to prevent injury to persons and damage to structures. Obtain approval from the Engineer prior to removing any shoring, sheeting, or bracing in excavations adjacent to on-grade slabs, foundations, or other structural elements.

3.3 GENERAL BEDDING

A. Shall be of the materials and depths as indicated on the plans for utility lines and utility line structures. Place bedding in 6-inch-maximum loose lifts. Provide uniform and continuous support for each section of structure.

3.4 GENERAL BACKFILLING

A. Construct backfill in two operations (initial and final) as indicated and specified in this section.

Place initial backfill using pipe bedding sand in 6-inch-maximum loose lifts to one foot above pipe and conduit unless otherwise specified. Ensure that initially placed material is thoroughly compacted under pipe haunches by the use of 'J'-bars or other tools as recommended by the pipe manufacturer. Bring up evenly on each side and along the full length of the structure.

Ensure that no damage is done to structures or their protective coatings. Place the remainder of the backfill in 8-inch-maximum loose lifts unless otherwise specified. Compact each loose lift as specified in paragraph "General Compaction" before placing the next lift. Do not backfill in freezing weather or where the material in the trench is already frozen or is muddy, except as authorized. Where settlements greater than the tolerance allowed herein for grading occur in trenches and pits due to improper compaction, excavate to the depth necessary to rectify the problem, then backfill and compact the excavation as specified herein and restore the surface to the required elevation.

3.5 GENERAL COMPACTION

A. Use hand-operated, plate-type, vibratory, or other suitable hand tampers in areas not accessible to larger rollers or compactors. Avoid damaging culvert. Compact material in accordance with the following unless otherwise specified. If necessary, alter, change, or modify selected equipment or compaction methods to meet specified compaction requirements.

1. Compaction of Culvert Bedding: Compact to 90 percent of ASTM D 1557 maximum density.

2. Compaction of Backfill: Compact initial backfill material surrounding culvert to 90 percent of

ASTM D 1557 maximum density except where bedding and backfill are the same material.

Where bedding and backfill are the same material, compact initial backfill to the density of the bedding.

3.6 FINISH OPERATIONS:

A. Grading: Finish to grades indicated within one-tenth of a foot. Grade areas to drain water away from structures. Grade existing grades that are to remain but have been disturbed by the

Contractor's operations.

B. Disposition of Surplus Material: Surplus or other soil material not required or suitable for filling, backfilling, or grading shall be removed from the Owner's property by contractor and disposed off-site.

C. Protection of Surfaces: Protect newly graded areas from traffic, erosion, and settlements that may occur. Repair or reestablish damaged grades, elevations, or slopes.

D. Pavement Repair: Repair pavement as indicated. Do not repair pavement until trench or pit has been backfilled and compacted as herein specified. Provide a temporary road surface of gravel over the backfilled portion until permanent pavement is repaired. Remove and dispose of temporary road surface material when permanent pavement is placed. As a minimum, maintain one-way traffic on roads and streets crossed by trenches; roads and streets shall be fully opened to traffic within one (1) day.

Section 31 23 23

TRENCHING AND BACKFILLING

1.1 RELATED WORK SPECIFIED ELSEWHERE

A. Section 31 01 00 - EARTHWORK

B. Section 31 23 16 - EXCAVATION

C. Section 32 12 16 - ASPHALT PAVING

A. Use only new materials and products, unless existing materials or products are specifically shown otherwise on the Drawings to be salvaged and re-used.

B. All materials, components, assemblies, workmanship and installation are to be observed by the

Engineer or Owner's representative. Work not so inspected is subject to uncovering and replacement.

1.3 REFERENCES AND STANDARDS

A. California Building Code current edition.

B. California Plumbing Code current edition.

1.4 DELIVERY, STORAGE AND HANDLING

B. Make delivery to job when notified by Contractor verifying that the job is ready to receive the

1.5 PROJECT CONDITIONS

A. Contractor shall acquaint himself with all existing site conditions. If unknown active utilities are encountered during work, notify Engineer promptly for instructions. Failure to notify will make

Contractor liable for damage to these utilities arising from Contractor's operations subsequent to discovery of such unknown active utilities.

B. Field verify that all components, backing, etc. by others are installed correctly to proceed with installation of products as herein specified.

C. Trench dewatering may be necessary. Contractor shall provide any and all tools, equipment and labor necessary for trench dewatering no matter what the source.

1.6 PROTECTION

A. Adequate protection measures shall be provided to protect workers and passers-by on and off the site. Adjacent property shall be fully protected throughout the operations. Blasting will not be permitted. Prevent damage to adjoining improvements and properties both above and below grade. Restore such improvements to original condition should damage occur. Replace trees and shrubs outside project area disturbed by operations.

B. Contractor shall be solely and completely responsible for working conditions at the job site, including safety of all persons and property during performance of the work. This requirement shall apply continuously and shall not be limited to normal working hours.

C. Any construction review of the Contractor's performance conducted by the Engineer or Owner is not intended to include review of the adequacy of the Contractor's safety measures, in, on or near the construction site.

D. Provide shoring, sheeting, sheet piles and or bracing to prevent caving, erosion or gullying of sides of excavation.

E. Surface Drainage: Provide for surface drainage during period of construction in manner to avoid creating nuisance to adjacent areas.