19-General Notices, Notes and Information.pdf

FOR:

On-Call - Maintenance - Concrete

Replacement/Repair South Zone - 2026

UPIN 26102QC0NU01

PREPARER’S CERTIFICATION FOR

Specifications, Special Specifications, Special

Provisions, Estimate and Specification Data

Special Note:

The following items developed per the published Construction

Drawings have been verified and included in the Purchasing

Department’s Bid Specification Package, which can be located at https://harriscountytx.bonfirehub.com/portal/: The items include:

• Pricing/Delivery Information

• Scope of Work

• Construction Notes

• Special Provision to Standard

• Specifications Special Specifications

• Supplement to General Requirements

• Contract Time 03/23/2026 https://harriscountytx.bonfirehub.com/portal/

SCOPE OF WORK

This On-Call Term Contract for Repairs/Replacement of Concrete Pavement, Curbs, Driveways, Sidewalks, and Related Items in the South Zone of Precinct 2. Other bid items facilitate accessible routes and may include modifications to driveways, roadway paving, minor adjustments to utilities, drainage improvements, stormwater pollution prevention, and site restoration.

Traffic control shall be provided during all phases of construction and must conform to the Texas

Manual on Uniform Traffic Control Devices (TMUTCD). All construction shall comply with project drawings, specifications, and the TMUTCD. Pedestrian facilities shall meet the Texas Accessibility

Standards (TAS).

In general, the scope of work at each location may include:

• Demolition and disposal of existing storm sewers, pavements, curbs, driveways, sidewalks, and other roadway surface items.

• Fine grading, disposal of spoil and unsuitable materials, importation of clean fill material.

• Installation of proposed, or repairs to existing, storm sewer trunks, laterals, manholes, and inlets.

• Construction of concrete pavement, curbs, driveway, sidewalks, and/or ADA ramps.

• Backfill and restoration of disturbed areas.

• Traffic control during construction.

• Installation, maintenance, and disposal of Storm Water Pollution Protection Plan (SWPPP) mitigation measures.

• Installation of lane striping and other traffic markings.

• Installation, Relocation, and/or replacement of existing traffic signs.

• Replacement of traffic signal detector loops damaged or removed through construction activities.

The contract term shall be 12 months or until the contract expenditure is met, with the option for up to four (4) one-year renewals at the discretion of Harris County. During the term, HCED-

CPD will notify the Contractor of work locations within the Precinct or maintenance zones as needed.

Estimated bid quantities are contingent and are used only for bid evaluation. Subsequently, a

Purchase Order will be issued based on the Precinct’s available budget. The Contractor will be paid based on actual accepted work completed at the unit prices bid and will not be entitled to additional payment due to variations between estimated and actual quantities.

On-Call Civil SOW Template V1.2 (2022-09-22)

Construction Notes

The Contractor shall be aware of the following in the preparation of his bid.

1. General

1.1. Projects completed in conjunction with this on-call contract shall be completed on a work order authorization basis. Details regarding the work authorization process can be found in the “Special Provision to General Conditions for

Roads, Bridges, and Related Work” included within the bid documents. All work orders will be processed using E-Builder TCWO review and approval process.

1.2. The Contractor shall not store materials or equipment on the roadway or right-of-way. Arrangements to provide a lay down area with adjacent property owners shall be the responsibility of the Contractor. Proposed lay down and access areas must be submitted and approved in writing before proceeding.

1.3. There exists the possibility that other private utilities such as sprinklers, decorative lighting, etc. may be present and conflict with the proposed construction.

In addition, there may be landscaping or decorative features that may need to be relocated to perform the work.

1.4. All property owners shall be notified by the Contractor a minimum of twenty-four (24) hours prior to blockage of driveways or entering of utility easements. The

Contractor shall give written notifications to the neighboring residents of the anticipated work schedule, including the Contractor’s name, contact person and 24-hour phone number. Notice shall be given at least forty-eight (48) hours prior to beginning the work at the site.

1.5. The Contractor shall issue an official notification to the County a minimum of twenty-four (24) hours prior to commencing on-site work.

1.6. The Contractor shall be responsible for providing required security to protect his own property, equipment, and work in progress. Where directed by Harris County, orange barricade fencing shall be used to restrict public access to work and equipment.

1.7. The condition of the road right-of-way, upon completion of the work, shall be substantially equivalent to that found prior to commencement of construction. The

Contractor will photograph the roadway surface and right-of-way prior to commencement of construction to be used as a benchmark for comparison purposes.

Restoration of the road right-of-way shall be considered incidental to the work and no separate payment shall be made.

1.8. Items damaged by the Contractor located outside of work area but situated within either road right-of-way or private property shall be repaired to a substantially equivalent state to that found prior to construction commencement at the Contractor’s expense, to the satisfaction of Harris County. Final acceptance of the work may be withheld by Harris County until such items are repaired.

1.9. As-built drawings for some existing facilities may be available. The

Contractor may request a digital copy of any available drawings from Harris County.

1.10. At times during the term of this contract, the Precinct may, at their sole discretion, request the Contractor to undertake work of similar scale and scope in the

North Zone of Precinct 2. In the event this occurs, the Contractor is not entitled to either additional the payment or unit rate adjustments for completing work within this area.

1.11. Utility Conflict Inspection Services include Subsurface Utility Engineering

(SUE), review of as-built drawings, field inspections, utility coordination, and all activities necessary to identify and resolve conflicts with existing utilities during pipeline corridor construction. The lump sum daily rate applies. If the actual inspection service fee varies, the bid item will be prorated accordingly to reflect the actual services performed.

1.12. At the time of work on the shoulder or signal lane, the contractor shall install and maintain proper traffic control according to HCED standards and charge item the signal lane closure. if the contractor installs and maintains traffic control two lanes or more with flag men, shall charge item two-way one-lane traffic, flagger control according HCED standards.

1.13. The bid items for Project Sign and SWPPP Monitoring and Documentation are included for potential use. These items shall be utilized on an as-needed basis for capital projects only when authorized by the Precinct or OCE Engineer. The

Contractor shall not utilize these items at their discretion. No payment will be made unless the items are directed and approved accordingly.

1.14. The Contractor shall provide traffic control during the performance of the work. All traffic control devices shall be in conformance with the Texas Manual on

Uniform Control Devices, (MUTCD). All vehicles shall be equipped with flashing amber lights or beacons. Workers shall wear reflective fluorescent vests approved for use in work zones when working within the roadway right of way. Payment for flaggers and traffic control devices shall be incidental to the cost of inspection and cleaning. The following traffic control guidelines, which are in accordance with Texas Manual on uniform traffic control devices, shall be used in this contract. These guidelines can be downloaded from the Harris County’s Engineering Department’s website at:

https://www.eng.hctx.net/Consultants/Standards-Specifications/Standard-Traffic-Drawings

Traffic Standard No. Description

TCP-SW Traffic Control Plan (Shoulder Work) https://www.eng.hctx.net/Consultants/Standards-Specifications/Standard-Traffic-Drawings

TCP-12

Traffic Control Plan (One-Lane, Two-Way

Operation)

TCP-LL Traffic Control Plan (Left Lane Closure)

TCP-RL Traffic Control Plan (Right Lane Closure)

2. Storm Sewers

2.1. All manhole covers and inlets shall be adjusted by the Contractor to match proposed finish concrete pavement, sidewalk, or driveway elevations.

3. Concrete Pavement, Sidewalks, Curbs and Driveways

3.1. Saw cutting of existing concrete pavement, curbs, and sidewalks shall be completed at locations where proposed construction ties into existing. Saw cutting shall be considered incidental to the work and will not be paid separately.

3.2. The Contractor shall minimize over excavation of subgrade. A uniform grade line shall be surveyed and staked by the Contractor prior to construction.

Review and approval of the proposed grade by Harris County is required be excavation commences.

3.3. The pay item “Cement Stabilized Sand (Void Fill)”, measured in Tons, shall be utilized only to fill any existing cavities or voids located under existing concrete pavement, below the proposed subgrade elevation. Use of this pay item is at the discretion of Harris County and shall not be utilized as payment for Cement Stabilized

Sand used elsewhere.

3.4. Texas Accessibility Standards (TAS) plan review, filing with the Texas

Department of Licensing Standards and Regulation (TDLR), and TAS inspection are required for all projects consisting of pedestrian facilities and related work equal to or exceeding $50,000 in construction costs. For qualifying projects, Harris County will undertake registration of the project with TDLR, completion of the TAS review by a qualified provided, and arrange for the post-construction TAS inspection.

3.5. It is the responsibility of the Contractor to verify that the minimum dimensions, slopes, and cross slopes meet TAS requirements, while in the presence of the Harris County Inspector. Harris County reserves the right to inspect and determine whether the work meets these requirements.

3.6. The Contractor shall provide an electronic level, capable of displaying percent slope and suitably calibrated, and demonstrate to the Harris County Inspector the slopes and cross slopes of the proposed work. If any discrepancies are noted, they shall be noted by both the Harris County inspector and Contractor. The

Contractor shall correct identified deficiencies as directed by Harris County, either through revised plans or by written instruction, at his cost

3.7. Working limits for proposed driveways and sidewalks shall comply with specifications. Longitudinal grades on proposed concrete pavement, curb, sidewalk shall follow existing grade lines or match those shown in the plans, as applicable. Curb ramps shall be constructed such that roadway drainage flows are not impeded, ponding within crosswalk areas is not impeded, and ponding areas can be dispersed, either through flow or evaporation, within twenty-four (24) hours of a rain event.

3.8. Adjustment of any manholes, warning signs, or other utility infrastructure located within a proposed concrete pavement, sidewalk or driveway area shall be completed by the utility owner, in coordination with the Contractor and Harris County.

4. Signing and Pavement Markings

4.1. Removal of existing pavement markings shall be completed in accordance with Harris County Specification 672. Removal of existing pavement markings shall be considered incidental to the work and will not be paid separately.

5. Traffic Control During Construction

5.1. All work shall be performed between the hours of 7:00 a.m. and 7:00 p.m.

Lanes may only be closed between the hours of 9:00 a.m. and 4:00 p.m. Traffic

Control shall be phased so that at least one lane is always open to traffic.

5.2. The maximum length of a single work zone located on a two-lane, two-way roadway operated under flagger control is eighty-five (85) linear feet.

5.3. The Contractor shall notify Harris County of locations where existing signs, traffic signals, or other roadside items signs conflict with the proposed work. Further directions will be provided regarding relocation of these items.

6. Storm Water Pollution Prevention Plan

6.1. Contractor is responsible for cleaning of streets caused by associated construction at close of each workday. Brooming and/or cleaning-up of the roadway shall be incidental to the project.

6.2. Stage II inlet protection barriers shall be installed at all inlets within and downstream of the work area. Reinforced Filter Fabric Barriers shall be installed around the work limits plus any areas where overland flow from excavated areas may be concentrated.

May 2019

GENERAL NOTICE TO CONTRACTORS

In accordance with House Bill 1059, a minimum of 25% of the work to be performed on this project shall be performed by the Bidder.

Special Notice: By law, the original price on firm fixed price contracts may not be increased by more than 25%. The original price may not be decreased by 18% or more without the consent of the contractor. Please monitor additions to your contract -additions in excess of 25% will not be paid under any circumstances.

On public works projects, all contractors shall supply a list of all suppliers and subcontractors with addresses and phone numbers, prior to work commencing.

At the time of the scheduled preconstruction meeting, the successful bidder shall supply to the County a list of representatives signed by an Officer of the Company who are authorized to sign official documents, i.e., Purchase Orders, Change Orders, Final Estimates, etc.

In determining who is a responsible bidder, Harris County may take into account the past performance of the bidder on Harris County projects. Commissioners Court adopted a written definition and criteria for determining the performance of a contractor which may be considered in determining the responsibility of a bidder.

Harris County is using an internet-based Construction Program Management Software, e-Builder to maintain consistent administrative and technical control for its projects throughout the County. The Contractor is required to use e-Builder on this project in accordance with procedures provided by the County.

At no cost to the Contractor, the County will provide system login account(s) and provide training for Contractor personnel. The Contractor must update e-Builder with any new or changed information within 24 hours of that information becoming known to Contractor. The Contractor must have access to a computer with internet access and a scanner to use eBuilder.

NOTICE TO CONTRACTORS

ON STORM WATER QUALITY AND

ENVIRONMENTAL ISSUES

In addition to the regulatory requirements stated in the General Conditions, the Contractor shall recognize and comply with the following:

SECTION 1. STORM WATER POLLUTION PREVENTION PLANS

A. COVERAGE

Coverage under the Texas Pollutant Discharge Elimination System (TPDES)

General Permit TXR150000 for storm water discharges associated with construction activities is required for a project that disturbs 1 acre or greater (or is a part of a larger common plan of development with the potential to disturb 1 acre or greater). Coverage requires the preparation, implementation, inspection, and maintenance of a Storm Water Pollution Prevention Plan (SWPPP), in accordance with the TPDES General Permit.

B. PROJECT CLASSIFICATION

This project is classified as one of three categories listed below. The

Contractor shall be responsible for the storm water quality items, accordingly.

1. “Construction Sites That Do Not Require TPDES General Permit

Coverage” The project disturbs less than 1 acre (and is not part of a common plan of development with the potential to disturb 1 acre or more); therefore, coverage under the TPDES General Permit is not required. However, the Contractor shall implement good housekeeping measures to minimize the potential for pollutants, associated with the construction activities, to enter the storm sewer system. Item 725, “General Source Controls”, shall be implemented by the Contractor, as well as any other erosion, sedimentation, and pollution controls shown in the plans and project manual.

or

2. “Small Construction Sites”

The project disturbs 1 acre or more, but less than 5 acres, (or is part of a common plan of development with the potential to disturb 1 acre or more);

therefore, coverage under the TPDES General Permit is required. The Contractor shall implement, inspect, and maintain the Storm Water Pollution Prevention Plan shown in the plans and project manual.

Certification of a TCEQ Small Construction Site Notice (CSN) in accordance with Part II.E.2 of the TPDES General Permit is required. The Contractor, as a primary operator, as defined by TPDES General Permit, shall certify one Construction Site Notice (CSN) and provide this to Harris County at the time that the contract is awarded. Harris County (owner), as primary operator, as defined by TPDES General Permit, shall certify a second Construction Site Notice (CSN) at the time the contract is awarded. After the project is awarded, Harris County shall provide copies of the two certified Construction Site Notices (CSN) to the Contractor, and send copies to the local storm sewer operator for notification purposes. Prior to commencing construction activities, the Contractor shall laminate and post the notices on the project site in a location where they are readily available for public viewing. The Contractor shall maintain the posted notices until after completion of the construction activities and final stabilization of the project site as defined by the TPDES General Permit. When the project is completed and stabilization is achieved, as defined by the TPDES General Permit, then the Contractor shall note the date that the Small Construction Site Notice was removed from the project site. A copy of the completed Small Construction Site Notice shall be provided to the Engineer with the SWPPP records. The County shall then notify the local storm sewer operator that storm water associated with construction activities is no longer being discharged from the site.

3. “Large Construction Sites”

The project disturbs 5 acres or greater (or is part of a common plan of development with the potential to disturb 5 acres or more); therefore, coverage under the TPDES General Permit is required. The Contractor shall implement, inspect, and maintain the Storm Water Pollution Prevention Plan shown in the plans and project manual. Certification of a Notice of Intent (NOI) in accordance with Part II.E.3 of the TPDES General Permit is required and shall be completed in accordance with Harris County Specification Item Number 700. The Contractor shall not commence with any earth disturbing activities on the project site until:

• at least seven (7) days after submittal of the NOI (Harris County & Contractors) via U.S. Postal Service, or if Utilizing electronic submittal, prior to commencing construction activities,

• copies of signed NOI’s are submitted to any municipal separate storm sewer system (MS4) receiving discharge, at least seven (7) days prior to commencing construction activities. Contractor shall list in the SWPPP the names and addresses of all MS4 operators receiving a copy.

• copies of the Certified NOI’s are posted in a publicly accessible location (copies shall be laminated or placed in weather resistant display case),

• and copies (Harris County & Primary Contractors) of construction site notice for large sites (CSN) are posted in a publicly accessible location. After construction activities are complete and final stabilization is achieved (as defined by the TPDES General Permit), the Contractor shall certify one Notice of Termination (NOT) form and provide it to Harris County. Harris County shall certify a second NOT form. Harris County shall submit the two NOTs to the TCEQ and the local storm sewer system operator. After the NOTs have been submitted to the TCEQ, then the Contractor shall remove all temporary SWPPP controls, cease SWPPP inspections, and deliver copies of all SWPPP records to the Engineer who shall archive them for a minimum of three years. The final payment to the Contractor may be held until all SWPPP records are received by the Engineer.

SECTION 2. STORM WATER QUALITY MANAGEMENT PLANS

A. COVERAGE

If this project meets the definition of “new development” or “significant redevelopment” as defined in the Harris County regulations or City of Houston ordinance on storm water quality and the project is not “grandfathered” or “exempt” as defined by the regulation or ordinance, then a Storm Water Quality Management Plan (SWQMP) is required for the project, as shown in the construction plans.

B. CLASSIFICATION

This project is classified as one of three categories listed below. The Contractor shall be responsible for the storm water quality items, accordingly.

1. “SWQ Permit Within Unincorporated Harris County”

If a Storm Water Quality Management Plan with permanent storm water quality controls is shown in the construction plans and the project is located in unincorporated Harris County, then a Storm Water Quality Management Plan is required prior to the start of construction. Prior to the start of construction, the Engineer shall submit the plans and Written Storm Water Quality Management Plan to the Harris County Permits Group and obtain the necessary signatures acknowledging acceptance of the Storm Water Quality Management Plan. The Contractor shall construct the SWQMP structural controls in accordance with the construction plans, and maintain the SWQMP structural controls until completion of the project and until the Engineer can certify that the SWQMP structural controls are constructed in accordance with the plans.

2. “SWQ Permit Within City of Houston” If a Storm Water Quality Management Plan with permanent storm water quality controls is shown in the construction plans and the project is located in the jurisdiction of the City of Houston, then a Storm Water Quality Management Permit is required prior to the start of construction.

Prior to the start of construction, the Engineer shall submit to the City of Houston the construction plans, the City of Houston Storm Water Quality Management Plan Application for Permit, and all other related documents shown on the permit application and obtain the Storm Water Quality Management Permit. Prior to the start of construction, the Contractor shall post a performance bond to the City of Houston for the construction of the storm water quality structural controls. The Contractor shall post a copy of the issued permit on the project site, construct the SWQMP structural controls in accordance with the construction plans, and maintain the SWQMP structural controls until completion of the project and until the Engineer can certify that the SWQMP structural controls are constructed in accordance with the plans.

The Engineer shall submit the Storm Water Quality Permit As-built Certificate to the City of Houston and Harris County shall begin implementation of the SWQMP.

3. “Grandfathered or Exempt from SWQ Permit” or “Storm Water Quality

Bank” If a Storm Water Quality Management Plan, or permanent storm water quality feature, is not shown in the construction plans, then a Storm Water Quality Management Permit is not required prior to the start of construction because it is grandfathered, exempt, or has provided storm water quality measures through the Storm Water Quality Bank.

SECTION 3. OTHER ENVIRONMENTAL ISSUES

A. BIOLOGICAL ISSUES

In accordance with requirements under the federal Migratory Bird Treaty Act, if in the course of construction, a bird rookery, an identified special migratory bird habitat, or a nesting site is discovered on the project site, then the Contractor shall cease work in the area and immediately notify the Engineer.

In accordance with the Federal Endangered Species Act and the Texas Parks and Wildlife Code, if a biological mitigation plan for specially protected flora and fauna species has been provided within the construction plans, then the Contractor shall comply with all requirements noted within the plan.

B. WATERS OF THE UNITED STATES INCLUDING ADJACENT WETLANDS

In accordance with Section 404 and Section 401 of the Clean Water Act and Section 10 of the Rivers and Harbors Act, waters of the United States including adjacent wetlands shall not be impacted by the Contractor unless a Department of the Army Permit has been obtained from the U.S. Army Corps of Engineers for the project.

If Harris County has obtained a Department of the Army Permit for this project, a copy of the permit is provided in the project manual. The Contractor shall comply with all requirements of the Department of the Army Permit. The Contractor shall not impact any waters of the United States and adjacent wetlands greater than the area and volume shown in the permit. If the Contractor impacts waters of the United States including adjacent wetlands on the project site that exceeds the area and volume shown in the permit, then the Contractor shall be responsible for any violations that may be issued by the regulatory agencies. If the Contractor deems it necessary to impact waters of the United States including adjacent wetlands that exceed the permit, then the Contractor must first notify the Engineer and the Engineer may obtain the necessary regulatory clearances prior to allowing the additional impacts to occur.

During construction of the project, if the Contractor uses off-site areas (not owned by Harris County) for placement of borrow material, disposal of construction debris, staging of construction materials, usage as a field office, or other types of construction related activities, then the Contractor shall be solely responsible for obtaining all environmental permits for the off-site activity, as well as providing all environmental controls and compensatory mitigation requested by the permitting agency. If a regulatory violation occurs as a result of this off-site activity, then the Contractor shall be solely responsible for this violation.

C. STATE OWNED SUBMERGED LANDS

The Contractor shall not impact submerged lands regulated under the authority of the Texas General Land Office, or other local agency, without an easement agreement. If an easement agreement is necessary for the construction activities, then the easement agreement shall be obtained by Harris County.

D. CULTURAL RESOURCES

In accordance with the National Historic Preservation Act and the Antiquities Code of Texas, the Contractor shall not remove or disturb, or cause or permit to be removed or disturbed, any historical, archeological, architectural, or other cultural artifacts, relics, vestiges, remains, or objects of antiquity from the project site. In the event that such items are discovered on the project during construction activities, the Contractor shall immediately notify the Engineer. The site and the potentially significant material shall be protected by the Contractor from further disturbance until a professional examination of them can be made and/or until clearance to proceed with construction has been provided by the Engineer.

E. HAZARDOUS AND PETROLEUM SUBSTANCES

If during the course of construction, the Contractor discovers hazardous or petroleum substances or wastes on the project site, then the Contractor shall immediately cease work in the area and remove all personnel from the area. The contractor shall temporarily close the area to the public, as well; temporary fencing or caution tape shall be installed around the area. The Contractor shall notify the Engineer immediately. Work in the area shall not be permitted until the Engineer has determined that safety and environmental issues have been properly addressed.

Harris County- Revised Precinct Boundaries

This map is a user generated static output from an Internet mapping site and is for reference only. Data layers that appear on this map may or may not be accurate, current, or otherwise reliable.

577,791

© Latitude Geographics Group Ltd.

18.2

THIS MAP IS NOT TO BE USED FOR NAVIGATION

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Notes

Harris County Boundary

Other Counties

Harris County

Commissioner Precincts 2021

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World Street Map

NOTICE OF SPECIFICATIONS

For the construction of this project, the Contractor shall use the attached Special Provisions, Special Specifications, and Harris County Engineering Department (HCED) Specifications Book – 2023 Harris County Standard Specifications for the Construction of Roads and Bridges, effective date October 10, 2023. The current HCED specifications may be found at the HCED website: https://www.eng.hctx.net/Consultants/Standards- Specifications/Standard-Engineering-Design-Specifications

When applicable, the Contractor shall use the Harris County Flood Control District (HCFCD) 2020 Standard Specifications Book. The current HCFCD specifications may be found at the HCFCD website: https://www.hcfcd.org/Resources/Technical-Manuals/Standard- Specifications-Related-Drawings?folderId=15985&view=gridview&pageSize=10

When applicable, the Contractor shall also use the Texas Department of Transportation (TxDOT) 2014 Standard Specifications Book. The current TxDOT specifications may be found at the TxDOT website: https://www.txdot.gov/business/resources/txdot-specifications.html

When applicable, the Contractor shall also use the City of Houston (COH) Standard Specifications. The current COH specifications may be found at the COH website:

https://www.houstonpermittingcenter.org/office-city-engineer/design-and-construction-standards https://www.eng.hctx.net/Consultants/Standards-Specifications/Standard-Engineering-Design-Specifications https://www.eng.hctx.net/Consultants/Standards-Specifications/Standard-Engineering-Design-Specifications https://www.hcfcd.org/Resources/Technical-Manuals/Standard-Specifications-Related-Drawings?folderId=15985&view=gridview&pageSize=10 https://www.hcfcd.org/Resources/Technical-Manuals/Standard-Specifications-Related-Drawings?folderId=15985&view=gridview&pageSize=10 https://www.txdot.gov/business/resources/txdot-specifications.html https://www.txdot.gov/business/resources/txdot-specifications.html https://www.houstonpermittingcenter.org/office-city-engineer/design-and-construction-standards https://www.houstonpermittingcenter.org/office-city-engineer/design-and-construction-standards

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SPECIAL SPECIFCATION

ITEM 2000

DECOMPOSED GRANITE BASE

2000.1 DESCRIPTION.

This Item shall consist of furnishing of decomposed granite material and construction of base, in accordance with the Contract Documents and specifications and in conformity with the lines and grades.

2000.2 REFERENCES.

A. ASTM D1556 “Standard Test Methods for Density and Unit Weight of Soil in Place by Sand-Cone Method”

B. ASTM D1557 “Standard Test Methods for Laboratory Compaction

Characteristics of Soil Using Modified Effort”

C. ASTM D2922 “Standard Test Methods for Density of Soil and Soil- Aggregate in Place by Nuclear Methods”

D. ASTM E11 “Standard Specification for Woven Wire Test Sieve Cloth and Test Sieves”

E. TxDOT Test Procedure Tex-110-E “Particle Size Analysis of Soils”

2000.3 MATERIALS.

The materials shall consist of decomposed granite with a color range from light to dark pink. The material shall be approximately equal parts light pink, medium pink and dark pink.

The contractor shall submit a one-gallon container of the proposed Decomposed Granite mixture to the Engineer prior to purchase or delivery, for approval of the color mix.

The gradation of the decomposed granite, as determined in accordance with TxDOT Test Method Tex-110-E, shall be as follows:

Sieve Size, Conforming to ASTM E11 Percent Retained, By Weight 5/8” 0%

Item 2000 Page -2-

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3/8 " 15 - 25% No. 4 40 – 55%

No. 10 75 – 85%

The plasticity index shall be in the range of 12-18.

The material shall be obtained from approved sources and shall be mixed with approved binding material. As a minimum the mixture shall contain 75% of Granite and 25% Clay, igneous rock – weathered in place or any sedimentary principally derived from igneous rock. With prior permission of the Engineer, additives may be used to meet the above requirements.

2000.4 CONSTRUCTION.

The site shall be prepared in accordance with Harris County Standard Specification Item 102 “Clearing and Grubbing. The subgrade shall be prepared in accordance with the Harris County Standard Specification Item 205 “Subgrade.” Immediately before placing the base material, the subgrade shall be checked as to conformity with the grade and section. Any deviation in excess of one-half (1/2) inch in cross-section and in a length of sixteen (16) feet measured longitudinally shall be corrected by loosening, adding or removing material, reshaping and compacting by sprinkling and rolling. Sufficient subgrade shall be prepared in advance to insure satisfactory prosecution of the work.

The material for the first course shall be deposited on the subgrade in a lift not to exceed six (6) inches in thickness. Material deposited upon the subgrade shall be spread and shaped the same day unless otherwise directed by the Engineer. The material shall be sprinkled, if directed and shall then be bladed, dragged and shaped to the typical sections as shown on the Contract Documents. All areas and most of segregated coarse or fine material shall be corrected or removed and replaced with well graded material as directed by the Engineer. If additional binder is considered desirable or necessary after the material is spread and shaped, it shall be furnished and applied in the amount directed by the Engineer. Such binder material shall be carefully and evenly incorporated with the material in-place by scarifying, harrowing, brooming or by other approved methods.

The course shall be sprinkled as required and compacted to the extent necessary to provide not less than 95 percent of modified proctor density in accordance with ASTM D1557, at a moisture content ranging from optimum to three percent above optimum. In addition to the requirements specified for density, the full depth of the flexible base shown on the Contract Documents shall be compacted to the extent necessary to remain firm and stable under construction equipment. After each section of flexible base is

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completed, tests as necessary will be made by the Engineer. If the material fails to meet the density requirements, it shall be reworked as necessary to meet these requirements. Throughout this entire operation the shape of the course shall be maintained by blading, and the surface upon completion shall be smooth and in conformity with the typical sections shown on the Contract Documents and to the established lines and grades. Any deviation in excess of 1/2-inch in cross section and in length of 16-feet measured longitudinally shall be corrected by loosening, adding or removing material as required, reshaping and recompacting by sprinkling and rolling. Should the base course, due to any reason or cause, loose the required stability, density or finish before the surface is complete, it shall be recompacted and refinished at the sole expense of the Contractor.

2000.5 QUALITY ASSURANCE AND ACCEPTANCE.

The acceptance requirements for this Item are the same as outlined by Harris County Standard Specification Item 230 "Crushed Aggregate Base Course."

Quality Assurance. Harris County reserves the right to have an independent testing laboratory test the material to determine if it meets these specifications. The tests shall be paid for by the supplier.

The Materials Engineer will determine the Moisture- Density Relationship in accordance with ASTM D1557 on material secured from the source of supply or the contractor.

The Materials Engineer will determine the in-place density in accordance with ASTM D1556 or ASTM D2922. The minimum level of testing will consist of at least three tests for each 1,000 feet of trails.

2000.6 MEASUREMENT.

This Item shall be measured by the square yard, of the thickness shown in the Contract Documents, in the completed and accepted final position.

2000.7 PAYMENT.

The work performed and materials furnished in accordance with this item and measured as provided under “Measurement” shall be paid for at the unit price bid for “Decomposed Granite Base” of the specified thickness.

This price shall be full compensation for furnishing all material required including all excavation and hauling of excavated material; subgrade preparation; sprinkling; compacting; labor, tools and incidentals necessary to complete the work.

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There are item code(s), description(s), and unit(s) for this Item.

NOTE: This specification requires Standard Specifications.

Item 100 “Preparing Right-of-Way ” Item 216 “Subgrade” Item 247 “Flexible Base”

END OF ITEM 2000

08-05

SPECIAL SPECIFICATION

ITEM 7019

STORM SEWER POINT REPAIR BY CONCRETE COLLAR

7019.1 DESCRIPTION.

This bid item includes the point repair of existing storm sewer piping by the installation of reinforced concrete collars. The item is intended for storm sewer piping where repairs are not feasible from the interior of the pipe.

Drawings, based on CCTV inspection of the storm sewer system showing the approximate location and condition of the segments to be repaired, shall be provided by the Engineer. The Contractor shall review all available inspection reports, videotapes, "as-built" drawings, and utility block maps to familiarize themselves with the existing conditions.

Prospective bidders must have at least five (5) years experience in successfully completing storm sewer repair projects, similar in size and scope to this project. A list of three (3) project references completed in the past two (2) years must be submitted to the engineer for review as part of the submittal process.

7019.2 MATERIALS.

Materials meeting the requirements of the following Items shall be used for storm sewer point repair by concrete collar.

A. Item 160 “Topsoil”

B. Item 400 “Excavation and Backfill for Structures”

C. Item 464 “Reinforced Concrete Pipe”

Cast Iron Castings. Manholes or inlet rings, covers, plates, grates, and bricks in good condition, removed from the sewer system in the process of repairing, may be reused.

7019.3 CONSTRUCTION.

The segment shall be inspected and cleaned in conformance with Special Specification Item 7024 prior to excavation. The Contractor shall be responsible for verifying the location and condition of the piping to be

08-05 repaired, and shall notify the Engineer of any additional conditions or deterioration that would require additional work items or methods.

Prior to excavation the Contractor shall notify all utility companies via the Utility Coordinating Committee at 1-800-344-8377, (1-800-DIG-TESS), and have all utilities located and marked in the vicinity of the proposed point repair. In addition, there might be irrigation or other utilities that will need to be present. The Contractor shall be responsible for locating these facilities and be responsible for repairing any resulting damage at no cost to Harris County.

The Contractor shall saw cut and remove existing paving and excavate above the repair area to expose the side and top of the pipe, providing trench shoring to resist lateral earth pressure. The pavement removal and excavation shall conform to and paid by in accordance with Harris County Special Specification Items 361 "Repair of Concrete Pavement" and 402 "Trench Excavation Protection.” The pipe shall be visually inspected to determine the nature and extent of the damage. Where the pipe exhibits signs of structural failure the pipe segment shall be replaced. Where the pipe appears to be sound, a concrete collar shall be installed to seal the void. The removal and disposal of existing concrete and metal pipe shall conform to Harris County Special Specification Item 108 "Removing Structures."

Following the inspection the pipe shall be cut and removed, if required, and further excavated to allow for cement stabilized sand bedding placement and compaction of the bedding. The new segment shall be installed and reinforced concrete collar(s) placed to seal the joints. Bedding requirements and pipe shall conform to and paid by in accordance with Harris County Special Specification Item 464 "Reinforced Concrete Pipe" and Special Specification Item 400 “Excavation and Backfill for Structures.”

After the excavation has been backfilled and compacted, the site shall be restored including replacement of paving or providing 6 inches of topsoil and Sodding. Pavement removal/replacement and site restoration shall conform with Harris County Special Specification Item 361 "Repair of Concrete Pavement," Standard Specification Items 160 "Topsoil" and 162 "Sodding for Erosion Control." The segment shall be further inspected and cleaned in conformance with Special Specification Item 7024 "Cleaning, Root Cutting, and Television Inspection of Storm Sewer Systems" following the repairs.

7019.4 SUBMITTALS.

Item 7019

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Records. Complete records shall be kept of point repairs performed in each storm sewer section. The records shall identify the storm sewer pipe sections at which the repair was done, the location of each concrete collar installed, and verification results.

7019.5 MEASUREMENT.

This Item shall be measured by each collar by pipe size.

7019.6 PAYMENT.

The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” shall be paid for at the unit price bid for “Storm Sewer Point Repair by Concrete Collar” of the pipe size specified. This price is full compensation for excavation and backfill, trench excavation protection, dewatering and/or by-pass pumping; cement-stabilized bedding and backfill; topsoil for site restoration and sodding;

furnishing all materials, tools, equipment, labor, and incidentals necessary to complete the work.

The descriptions and units for this item are:

Point Repair 18" to 21" Diameter RCP Concrete Collars Each Point Repair 24" to 27" Diameter RCP Concrete Collars Each Point Repair 30" to 33" Diameter RCP Concrete Collars Each Point Repair 36" to 42" Diameter RCP Concrete Collars Each Point Repair 48" Diameter RCP Concrete Collars Each

NOTE: This specification requires a drawing.

NOTE: This Item requires other Standard and Special Specifications.

Item 160 “Furnishing And Placing Topsoil” Item 162 “Sodding For Erosion Control” Item 108 “Removing Structures” Item 361 “Repair of Concrete Pavement” Item 400 “Excavation and Backfill for Structures” Item 402 “Trench Excavation Protection” Item 421 “Hydraulic Cement Concrete” Item 464 “Reinforced Concrete Pipe” Item 7024 “Cleaning, Root Cutting, and Television Inspection of Storm

Sewer Systems”

END OF ITEM 7019

10-05

SPECIAL SPECIFICATION

ITEM 7024

CLEANING, ROOT CUTTING, AND INSPECTION

OF STORM SEWER SYSTEMS

7024.1 DESCRIPTION.

The Contractor shall furnish all materials, labor and equipment necessary for the inspection, root removal and cleaning of the storm sewer lines or systems indicated on the drawings and/or included in the project’s Scope of Work.

The cleaning shall be accomplished by hydraulically propelled cleaning equipment and all resulting debris/liquids shall be removed from site and disposed of in accordance with all Federal, State and local laws. Inspection shall be by means of a closed circuit television inspection; and be documented in a written report including a VHS copy of the inspection tape.

7024.2 DEFINITIONS.

Cleaning. The term "clean" as used in these specifications shall mean the removal of all sand, occasional roots, brick, concrete, sludge, liquid and all other debris from the designated sewer lines.

Root Cutting. The term "root cutting" as used in these specifications shall mean the use of a mechanical root cutter to remove medium to heavy root infiltration that cannot be cut using the nozzle alone.

Manhole Section. The term "manhole section" as used in these specifications shall mean the length of pipe connecting two manholes.

7024.3 OWNER AND CONTRACTOR OBLIGATIONS.

Owner. The Owner shall furnish at no cost to the Contractor, the following items during the entire project:

A. Site Access. Access to the site of work with sufficient area for the placement of the equipment and personnel. All work will be within easements and roadway right-of-way.

B. Drawings. A set of drawings of sketches indicating the location of the storm sewer system to be inspected/cleaned, along with identification of the manholes, inlets, outfalls and pipe runs.

Item 7024

C. Any previous CCTV inspection tapes/reports and “as-built” drawings of the storm sewer system.

Contractor. Contractor shall furnish following services and incidental items, unless otherwise noted to the cleaning and televising:

A. Water for Cleaning and Inspection. The Contractor shall provide potable water for cleaning and/or inspection operation.

B. Storm Water Control. The Contractor shall be responsible for control and dewatering of the storm sewer system to allow for cleaning and inspection. All costs for pumping shall be incidental to the Item for Inspection and Cleaning of Storm Sewer Systems.

C. Waste Disposal Site. The Contractor shall contract with an approved site or landfill for the disposal of all material removed from the existing storm sewer.

D. Hauling Material for Disposal. The Contractor shall include in his price whatever is involved in transporting material to be disposed of.

7024.4 STORM SEWER CLEANING.

Storm Sewer Cleaning Equipment.

A. The Contractor shall use a truck mounted high velocity sewer jet and vacuum having a waste capacity of 9 to 12 cubic yards. The equipment shall have minimum of 1,500 feet of high-pressure hose and operate at 2,000 PSI at 65 GPM.

B. The equipment shall carry its own 1,000 Gallon water tank capable of holding corrosive or caustic cleaning or sanitizing chemicals if required by the Engineer, auxiliary engines and pumps, and hydraulic driven hose reel. All controls shall be located so that the equipment can be operated above ground.

C. If a storm sewer section is found completely plugged or heavily intruded with roots, then a self-propelled mechanical root cutter shall be used as directed by the Engineer.

Authorization for Cleaning.

A. The segment(s) of Storm Sewer that need to be cleaned or inspected are shown on the drawings.

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B. The designated storm sewer manhole sections and manholes may be cleaned using high velocity sewer cleaning equipment.

Selections of the equipment shall be based on the conditions of the lines at the time the work commences.

C. Satisfactory precautions shall be taken to protect the sewer lines from damage that might be inflicted by the improper use of cleaning equipment. Whenever hydraulically propelled cleaning tools, which depend upon water pressure to provide their cleaning force or any tools which retard the flow of water in the sewer lines are used, precautions shall be taken to insure that the water pressure created does not cause any damage or flooding to public or private property being served by the manhole section involved. The flow of water in the sewer lines shall be utilized whenever possible. When additional quantity of water from fire hydrants is necessary to avoid delay in normal working procedures, the water shall be conserved and not used unnecessarily. No fire hydrant shall be obstructed in case of a fire in the area served by the hydrant.

D. All debris, sludge, dirt, sand, rocks and other solid or semi-solid material resulting from the cleaning operation shall be removed at the outfall end of the section being cleaned. Passing material from manhole section to manhole section, which could cause line stoppages, shall not be permitted.

E. Under no circumstances shall debris or solids removed from the storm sewer be dumped onto streets or into ditches, catch basins or storm drains.

F. All solids or semi-solids resulting from the cleaning operations shall be removed from the site and disposed of at no additional cost to the owner.

G. The Contractor shall televise the manhole section following cleaning.

H. Root cutting will be for only those portions where medium to heavy root intrusion is encountered and a root cutter is required and as approved by the Engineer. Minor root cutting is incidental to the cleaning of storm sewer line.

7024.5 CLOSED CIRCUIT TELEVISION (CCTV) INSPECTION.

Equipment and Procedures.

A. A self-contained and air conditioned mobile trailer or van shall be provided which is large enough to accommodate representatives of

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the Engineer and the Contractor for purpose of viewing/monitoring the work while inspection is in progress. Trailer or van shall be equipped with a closed circuit television camera, color monitor, video tape recorder, winches (power and mechanical), cable, and cable reel, suitable metering device so that exact location of camera within the line being televised can be noted at all times, and all necessary equipment for successful completion of television inspection.

B. Television equipment shall consist of a tilt and pan color camera and a monitoring unit connected by a coaxial cable. Camera shall be small enough to ensure passage through the lines, be waterproof and provide a continuous, clear picture showing the entire inside periphery of the pipe.

C. The television inspection shall be performed on one manhole section at a time. Each manhole section being inspected shall be isolated from the remainder of the line by the use of a line plug to insure total viewing of the inside periphery of the pipe. The inspection shall be performed by pulling the television camera through the line along the axis of the pipe.