16-General Notices, Notes and Information.pdf

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

• Special Provision to Standard Specifications

• Special Specifications

• Supplement to General Requirements

• Contract Time

FOR:

Remediation and Maintenance of Existing Subdivision Infrastructure in Various Locations, 2025; UPIN 26208MF3YP01

2/25/2026 https://bids.hctx.net/bso/ khaled.suleiman Stamp

SCOPE OF WORK

Work in general, in this contract shall include, but is not limited to the following:

This project provides remediation services to deliver small-scale civil construction projects for Harris County. Examples of potential projects completed under this on-call agreement include Parks, Roadway repairs, and improvements. The project term is for one (1) year, with the option for up to four (4) renewals at the discretion of Harris County.

1. A renewable contract for the repair, rehabilitation and remediation of existing paving and storm drainage systems typically found in various locations in Harris County, including subdivisions and low volume roadways. Due to the varied conditions and in order to provide for a complete process additional bid items are included for and related to paving, drainage, inlets, manholes, traffic signs, pavement markings, as well as numerous incidental items.

2. Harris County reserves the right to consider extension options for this Contract under the same terms and conditions for a period of four (4) additional years. The extension option shall be upon mutual consent of The Contractor and Harris County.

3. During the project term, the Engineering Department will notify the Contractor, at various times, of locations where work within Harris County is to be completed.

Subdivision Remediation Contract 2023

CONSTRUCTION NOTES

1. The bid quantities provided are for bid evaluation only. These quantities represent the expected number of each item to be used during the one (1) year period and the County reserves the right to adjust bid items and quantities as needed.

2. The Contract allows for four (4) renewals and bid items/quantities may be adjusted time to time by means of a Change in Contract

3. The contract will be in effect for a period of twelve (12) months starting from the date agreed to in the pre-construction meeting.

4. The intent of this contract is to provide for the remediation of existing roadways and related infrastructure in various parts of Harris County. Remediation includes the removal/repair/replacement of different types of pavements, storm sewer components, traffic markings/signs and other items to provide for improvement of the existing or acceptance of infrastructure for maintenance by Harris County.

5. Removing and disposing of concrete pavement, concrete curbs, concrete driveways, and sidewalks, shall be considered incidental to the bid item for repair/replacement of the same type of concrete structure.

6. Existing paving thicknesses will vary from site to site. For the purpose of this contract, the typical existing concrete roadway will vary from seven (7) to ten (10) inches thick, with driveways being in the range of six (6) to seven (7) inches thick and sidewalks being four (4) inches +/- one (1) inch. Unless otherwise directed, the proposed paving shall be at the thickness shown in the bid item. Any additional excavation is considered incidental.

7. Cement stabilized sand shall be used for base material on all proposed road pavement and driveways in this contract. A six inch (6”) thick cement stabilized sand base shall be incidental to the bid items for all concrete road pavements and for six inch (6") thick concrete driveways.

8. Two inch (2”) thick sand bedding shall be incidental to the bid items for all 4 ½” sidewalks/walkways.

9. Where sidewalks cross driveways, the sidewalk thickness shall match the thickness and bedding for the driveway.

10. The Contractor shall provide expansion joints at existing locations of the pavement. If there are no expansion joints in the pavement or if it is not specified on the drawings or specifications, the Contractor shall provide expansion/control joints at maximum of eighty foot (80’) intervals and as directed by the engineer.

The payment for providing expansion joints shall be incidental to the contract.

11. Special care shall be used by the contractor to minimize over excavation of subgrade below the proposed six inch (6") thick base material. This shall be done by the Contractor establishing a uniform grade line to the satisfaction of the Engineer, prior to excavation.

Subdivision Remediation Contract 2023

12. The bid item for rapid setting, high early strength concrete shall be measured and paid per cubic yard. This item shall only be used on an as needed basis as approved by the Precinct and the Engineer. When required, the Contractor shall submit the mix design for the rapid setting, high early strength concrete to the Engineer for approval prior to ordering the concrete.

13. Concrete collars shall be constructed around pipe joints as necessary, (Detail).

14. The Contractor shall begin all concrete pours before 1:30 p.m. and/or finish all pours before 2:30 p.m.

15. Replacement of grass sod and any backfill material needed behind the concrete curb and adjacent to concrete pavement repairs shall be incidental to the bid item for concrete pavement.

16. The Contractor shall locate any existing improvements (waterlines, sprinklers, or landscape appurtenances) to mitigate damages. The Contractor is responsible for replacing these, to the original condition or better at no extra charge to the County.

17. Prior to closing and repairing the respective lane of concrete pavement, the Contractor shall notify the adjacent residents 48 hours in advance, so they can plan their access and egress.

18. It is the general preference of Harris County to use pre-cast storm sewer structures including manhole and inlets in the construction of storm sewer systems. Due to space constraints and other limitations, it may be necessary to use either poured in-place concrete or brick to construct or repair manholes, inlets, junction boxes or other components.

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 will be using a county-maintained database to maintain consistent administrative and technical control for its projects throughout the County. The Contractor is required to use the database 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 the database 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 the database.

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

Legend

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WGS_1984_Web_Mercator_Auxiliary_Sphere

Miles0 18.29.12

Notes

Notes

Harris County Boundary

Other Counties

Harris County

Commissioner Precincts 2021

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Pct 3

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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

K:\Design Services\Projects\Other\Subdivision Remediation Contract 2014\2014 Contract\SP 361 Dowels and Shoring.doc

SPECIAL PROVISION TO ITEM 361

Repair of Concrete Pavement

361.7

361.7

361.8

361.8

“Measurement” Paragraphs 3 & 4 of this section are replaced by the following:

All labor and materials required to provide any dowels and their placement is considered incidental to the Bid Item for “Repair of Concrete Pavement.”

All trench shoring, fill/compaction for pipe replacement and doweling are not measured and shall be incidental to item for Full Depth Concrete Replacement.

“Payment” Delete Paragraphs 3 & 4 of the Item.

All doweling and all trench shoring, fill/compaction for pipe replacement and doweling shall be considered incidental to the pay item.

1/1 k:\design services\projects\other\subdivision remediation contract 2014\2014 contract\special provision to item 671.doc

SPECIAL PROVISION TO

ITEM 694

TEMPORARY TRAFFIC CONTROL

On page four of five, Sections 694.6 and 694.7 shall be deleted.

Section 694.6 and 694.7 Measurement and Payment, shall be replaced by the following:

All traffic control devices, traffic handling, signs, barricades, signals, flagmen, lights, striping, etc., used during construction, will be measured and paid for by the unit price per traffic control setting. The price shall be full compensation for furnishing all labor, materials, supplies, equipment and incidentals necessary to complete the work outlined by this specification.

A traffic control setting shall include all traffic control devices necessary to secure a single work area as per Harris County specifications and drawings. A single work area may include many repairs. Each setting shall enclose all repairs within any 500 foot distance of any other repair. A single traffic control setting may be as long as 1000 feet but is not limited to 1000 feet.

Payment will be made on the following basis:

1. The total amount for this item will not exceed 10 percent of the total contract amount prior to the final estimate. The portion of the contract amount for this item in excess of 10 percent of the total contract amount will be paid for on the final estimate.

2. The quantity under this item will not exceed the total plan quantity, except when additional work is approved by a Change in Contract. No increase in quantity will be allowed for this item unless the additional quantity is included in the field change adding the additional work. When work is suspended for the convenience of Harris County, through no fault of the Contractor, additional quantity may be paid when approved by a Change in Contract.

3. An overrun for this item will not be allowed for approving designs, material shortages, curing period, test periods, failure to complete the work prior to payment of the amounts allowed by paragraphs 1 and 3 above, nor delays caused directly or indirectly by requirement of the contract.

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SPECIAL SPECIFICATION

ITEM 4011

BRICK MANHOLES

4011.1 DESCRIPTION.

This Item shall govern for the construction of brick manholes on storm sewers, 72-inch in diameter or smaller including the materials used therein and the furnishing of frame, rings and covers. Manholes for pipe sized greater than 72-inch, use precast concrete manholes. Brick manholes shall not be used on Harris County projects unless it is determined by the Engineer during construction that a precast manhole or cast-in-place manhole should not be installed.

4011.2 REFERENCES.

A. AASHTO M 306 “Standard Specification for Drainage, Sewer, Utility, and Related Castings”

B. ASTM A48 “Standard Specification for Gray Iron Castings”

C. ASTM C32 “Standard Specification for Sewer and Manhole Brick (Made From Clay or Shale)”

D. ASTM C55 “Standard Specification for Concrete Building Brick”

E. ASTM C144 “Standard Specification for Aggregate for Masonry Mortar”

F. ASTM C270 “Standard Specification for Mortar for Unit Masonry”

4011.3 MATERIALS.

Concrete. Concrete shall conform to Standard Specification Item 421 "Hydraulic Cement Concrete."

Mortar. Mortar mix design shall conform to ASTM C270, Type M, using Portland Cement. Aggregate for Mortar shall conform to ASTM C144.

Concrete Brick. Concrete brick shall be in accordance with ASTM C55, Grade A.

Bricks shall be of first quality, sound, hard-burned perfectly shaped brick.

Shale bricks, if used, shall be homogeneous thoroughly and uniformly

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burned. Bricks shall not absorb more than 16-percent of water by weight when submerged in water for 24-hours, having been in a completely dry state prior to placing in water. Clay brick shall conform to the requirements of ASTM C32, Grade NA, except that not more than 16% maximum individual brick absorption will be permitted.

Reinforcing Steel. Reinforcing steel shall conform to Standard Specification Item 440 "Reinforcement for Concrete."

Cast Iron Castings. Cast iron shall conform to ASTM A48, Class 35B - Cast iron manhole frames and covers shall be heavy duty and shall be manufactured to the dimensions shown on the attached drawing. As-cast dimensions may vary in accordance with AASHTO M 306. Casting shall be free from sand or blow holes and other defects. Holes in cover to be free from plugs and burrs. The machined bearing surfaces of manhole frames and covers shall obtain even bearing cast wording "Storm Sewer." Thirty-two (32) inch manhole covers will be used on all manholes. The cover shall not rock when rotated to any position in the frame.

The castings shall be certified to withstand the proof-load testing of 40,000 lbs. without any cracks or detrimental permanent deformation greater than 1/8”.

Marking. Each individual casting shall be identified by the foundry showing the following:

• Name of producing foundry.

• AASHTO or ASTM designation number.

• Class by a number followed by a letter indicating the minimum tensile strength and size of test bar.

• Casting as required by the drawings.

4011.4 CONSTRUCTION.

The Contractor shall prepare a hole large enough to accommodate the outside dimensions of the manhole. Manholes shall be constructed on concrete foundations of the shape and size indicated for the type of manhole required. Unless otherwise indicated on the drawings, use a standard manhole. The foundation shall be a minimum of 8-inches in thickness, Class E reinforced concrete. The foundation shall be placed as soon as practicable after the sewer line is completed through the manhole location.

One-half inch mortar joints shall be used in brick work. Joints shall be struck flush on inside of manhole. The outside of brick manholes shall be plastered with one-half inch thick mortar cover. This mortar cover shall be carried up with the brick work. All mortar shall consist of one part cement

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and three parts clean, durable, sharp sand meeting the specifications for fine aggregate for concrete as set out elsewhere herein. All mortar joints shall be a maximum of 1/2" and where possible shall be "shoved" joints.

Where inlet leads, main or lateral pipe sewers enter manholes, pipes shall be cut off flush with inside of manhole and any irregularities shall be pointed up with mortar. Brick shall be thoroughly wet immediately before using.

After the masonry work has been completed to the proper elevation the cast iron manhole cover frame shall be set in a full mortar bed and adjusted to the elevation established by the Engineer.

The inverts of the sewer line or several sewer lines entering the manhole at or near the flow line elevation of the manhole shall be shaped and routed across the floor of the manhole using mortar to obtain the proper contour.

Where the main sewer (lowest line) passes straight through the manhole or the degrees of deflection of the main sewer is less than 5-degrees, and no other line or stub out is shown entering the manhole below the centerline of the main sewer, lay the sewer continuously through the manhole. After the manhole walls have been completed above the top of the sewer, breakout and remove the top half of the barrel of the sewer pipe that was previously laid through the manhole. Use concrete with a 1-inch mortar topping and construct the invert as shown in the attached drawing.

Where the main sewer (lowest line) alignment deflects greater than 5-degrees at manhole or where another sewer or stub out enters at or below the centerline of the main sewer, terminate main sewer pipe, by laying it in such a manner that pipe ends flush at the inside of the manhole. Construct the invert with concrete and top with 1-inch of mortar. Shape invert for smooth flow across floor of manhole and slope the side as shown to obtain proper contour.

Where the depth of manhole exceeds 8-feet, measured from flow line to top of cast iron casting, construct that portion of manhole wall below 8-feet depth, 12- inches in thickness. Construct manhole walls less than 8-feet in depth, 8-inches in thickness. Lay every fifth course of brick in such a manner as to effect ties to the course immediately thereunder. In general, make long axis of tie course perpendicular to the long axis of the preceding four courses. Use 1/2-inch thick mortar joints and strike flush on the inside of manhole. Plastered and buttered joints will not be permitted.

Stub outs shall be installed, where shown, to the lines and grades. Use one full joint of pipe, of the size indicated, for stub out. Seal stub out with plug.

Install the plug in such a manner as to prevent seepage or leakage through stub outs. The plugs shall be installed so that they may be easily removed in the future, without damaging the end of the stub out. When inlet leads, lateral sewer pipe, stub outs and drop connections enter manholes, cut off

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4011.5

4011.6 ends of protruding pipe flush with inside of manhole wall. Point up any irregularities with mortar. Plaster outside of brick manholes with 1/2-inch mortar cover.

After masonry work for manholes exceeding 4-feet in depth has been completed to proper elevation, set cast iron manhole frames in full mortar bed and adjust to required elevation. After the masonry work for manholes less than 4-feet in depth (shallow manhole) has been completed to proper elevation, set precast manhole cover slab in full mortar bed and adjust to the required elevation. Unless otherwise shown on the drawings, the top of cast iron casting is to be flush with adjacent finished surface.

Backfill around manholes shall be placed immediately after mortar and concrete has set in accordance with Standard Specification Item 400 “Excavation and Backfill for Structures.” Where proposed sewer lines connect to existing manholes at grade, reshape invert of existing manhole, so that no turbulence is created in the manhole as a result of the connection.

SUBMITTAL.

All shipment shall include certification from the appropriate foundry. This certificate shall also state that all samples representing each lot have been tested, inspected, and have been found to meet the requirements of this specification and the applicable ASTM material specifications.

Submit laboratory reports prepared by an independent testing laboratory stating that materials used comply with the requirements of this Item.

MEASUREMENT.

Manhole depths shall be measured by the linear foot of vertical distance from flow line of manhole to top of manhole casting and shall be classified as follows:

A. Shallow manhole - a manhole with depth less than 4-feet.

B. Standard manhole - a manhole with depth less than or equal to 8-feet but greater than or equal to 4-feet.

C. Extra depth manhole – a manhole with a depth of greater than 8 feet.

4011.7 PAYMENT.

Payment for "Shallow Manhole", "Standard Manhole", and “Extra Depth Manhole”, shall be made at the contract unit price indicated for each type measured complete and in-place.

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The line codes, descriptions and units for this item are:

4011.0001 Brick Manhole – Shallow Manhole EACH

4011.0002 Brick Manhole – Shallow Manhole Modified w/ E/Inlet Top

EACH

4011.0003 Brick Manhole – Shallow Manhole Modified w/ A/Inlet Top

EACH

4011.0004 Brick Manhole – Shallow Manhole Modified w/ H/Inlet Top

EACH

4011.0011 Brick Manhole – Standard Manhole EACH

4011.0012 Brick Manhole – Standard Manhole Modified w/ E/Inlet Top

EACH

4011.0013 Brick Manhole – Standard Manhole Modified w/ A/Inlet Top

EACH

4011.0014 Brick Manhole – Standard Manhole Modified w/ H/Inlet Top

EACH

4011.0021 Brick Manhole – Extra Depth Manhole VF

4011.0022 Brick Manhole – Extra Depth Manhole Modified w/ E/Inlet Top

VF

4011.0023 Brick Manhole – Extra Depth Manhole Modified w/ A/Inlet Top

VF

4011.0024 Brick Manhole – Extra Depth Manhole Modified w/ H/Inlet Top

VF

4011.0030 Break Into Existing Manhole to Tie-in A Lead EACH

NOTE: This specification requires drawings.

DWG No. HC470-1 – Manholes for Sewers less than 48” diameter Pipe DWG No. HC470-2 – Storm Sewer Manhole for 48” to 72” diameter Pipe DWG No. HC470-3 – Manhole for Junction Box DWG No. HC470-4 – Manhole Casting Details

NOTE: This specification requires other Standard Specifications

Item 400 “Excavation and Backfill for Structures” Item 421 “Hydraulic Cement Concrete” Item 440 “Reinforcement for Concrete”

END OF ITEM 4011

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08-05

SPECIAL SPECIFICATION

ITEM 7021

CLEANING AND SEALING JOINTS IN EXISTING

CONCRETE PAVEMENT

7021.1 DESCRIPTION.

This Item shall consist of cleaning and resealing transverse and longitudinal joints and random cracks in existing concrete pavement. It generally applies to joints which are from 1/4 inch to 1-1/2-inch in width.

7021.2 REFERENCES.

A. ASTM D6690 “Standard Specification for Joint and Crack Sealants, Hot Applied, for Concrete and Asphalt Pavements”

7021.3 MATERIALS.

The joint sealing compound shall be manufactured for the purpose of sealing joints in concrete pavement. The compound shall be a rubber-asphalt joint sealant conforming to ASTM D6690.

7021.4 EQUIPMENT.

The Contractor shall submit a list and description of the equipment to be used for installing the specified sealant for approval by the Engineer prior to use. All other equipment will be approved by the Engineer prior to use on the project.

7021.5 CONSTRUCTION.

In general, the deteriorated old sealant at the top part of the joint shall be cut or scraped loose from the joint faces using the appropriate equipment like tractor mounted vertical cutting edge or a tractor mounted plow. Care should be taken not to damage the joint edges during cutting or scraping operations.

The old sealant and any foreign matter shall be removed to a depth enough to accommodate the new sealant plus the backup or bond breaker material that may be needed.

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After scraping all loose material in the joint dirt shall be removed by oil-free compressed air delivered at a rate of 120 cu. ft. per minute and at a nozzle pressure of not less than 90 psi.

If not all of the old sealant from the faces of the joint is removed then a power driven concrete saw with diamond or abrasive blades shall be used to reface the joint.

The sealant reservoir so prepared shall be close to the dimension shown on the attached drawing (HC 8128-1). The prepared surfaces of the joint shall be surface dry at the time sealants are placed.

Preparation of Joints. After the joint has been cleaned, a bond breaker, rubber backing rod or other device approved by the Engineer shall be placed at the bottom of the reservoir, as shown by the attached drawing. If a rod is used, it must be of such a diameter that it will support the sealant at its design depth and prevent the sealant from leaking around it.

Preparation of Construction and Longitudinal Joints. Usually construction and longitudinal joints do not require extensive preparation unless the joint has been damaged and needs to be sealed. In such cases these joints shall be cleaned before sealing to a depth that allows the placement of the sealant and backer rod, as shown on the attached drawing

(HC 8128-1).

Preparation of Expansion Joints. Expansion joints shall be cleaned down to the top of the filler. The joint may require a backstop or bond breaker to separate the filler from the new sealant if the compatibility with the old sealant is questionable.

Installation of Hot-Poured Joint Sealant. The sealant compound shall be melted in an indirect-heating double boiler with oil as a heat transfer medium. The kettle should be equipped with a mechanically operated agitator to ensure uniform heating and melting of the compound and should have a positive thermostatic temperature control. Sealant manufacturer's recommendation for heating and application shall be followed.

The melted sealant shall be injected in the reservoir through nozzles shaped to penetrate into the joint and fill the reservoir from the bottom up. On small jobs hand pouring pots can be used.

At the time the sealant is applied the reservoir faces shall be cleaned and free of objectionable matters. The ambient and pavement temperature shall be no less than 50°F. The top of the new sealant shall be 1/4 inch below the top of the pavement surface.

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Sealant compound accidentally or otherwise spilled on the surface of the pavement shall be removed by the contractor without damaging the concrete.

7021.6 MEASUREMENT.

Cleaning and Sealing Joints in Existing Concrete Pavement shall be measured by the linear foot completed.

7021.7 PAYMENT.

The work performed and materials furnished as prescribed by this item and measured as provided for under measurement, will be paid for at the unit prices bid for “Cleaning and Sealing Joints in Existing Concrete Pavement”, which price shall be full compensation for furnishing and operating all equipment, for all materials, labor and incidentals necessary to complete the work.

The descriptions and units for this Item are:

Cleaning and Sealing Existing Concrete Pavement Construction Joints (0.25” to 0.75” width)

Linear Foot

Cleaning and Sealing Existing Concrete Pavement Expansion Joints (0.75” to 1.50” width)

Linear Foot

NOTE: This Item Requires a drawing that shall be incorporated into the Contract Documents.

Drawing HC 8128–1 Cleaning and Sealing Existing Concrete Pavement Joints

END OF ITEM 7021

08-05

ITEM 7029

REPAIRING MANHOLES AND INLETS

7029.1 DESCRIPTION.

This Item shall govern for the furnishing of materials and for the repairing of damaged and/or deteriorated manholes and inlets where required by the plans or as directed by the Engineer. Such damaged or deteriorated manholes and inlets shall preferably be restored to their original condition, or if this is not feasible, they shall be restored to the extent that the Engineer deems practical.

7029.2 MATERIALS.

Provide additional materials in accordance with the material requirements of the following Specifications:

A. Standard Specification Item 465 "Concrete Manholes and Junction

Boxes"

B. Standard Specification Item 466 "Inlets”

C. Special Specification Item 4011 “Brick Manholes"

Rings, Covers, Plates, or Grates. Manhole rings, covers, plates, or inlet grates, and brick in good condition, removed from the manholes and inlets in the process of repairing, may be reused. The Engineer shall determine whether the existing rings, covers, etc. may be reused.

7029.3 CONSTRUCTION.

Manholes rings, covers, plates, and inlet grates shall be carefully removed and the contact areas shall be cleaned of all mortar and contaminants.

Rings, covers, plates, or grates broken in the process of removal shall be replaced in kind.

Damaged or deteriorated brickwork and/or concrete shall be removed to the extent necessary to expose sound material. In the case of brickwork, the mortar shall be cleaned from the top course of brick remaining in place and from all brick to be reused. Concrete and brick surfaces shall be thoroughly cleaned of all loose material or other contaminants before rebuilding to original top dimensions. The walls and top shall then be rebuilt by placing new concrete and/or courses of brick. After rebuilding, the manhole or inlet ring, cover, plate, or grate shall then be installed with the top conforming to the original surface of street or grading as the case may be.

Grade rings where used shall have 1/2 inch thick cement mortar coat inside and outside or the grade rings shall be installed with grout or mastic joint compound e.g. Flex-Seal Utility Sealant or approved equal, to provide a sealed grade ring area. Alternately the grade rings shall be sealed from outside with Infi-Shield Uniband or approved equal.

The repair of the pavement adjacent to the manholes or inlets shall be completed in accordance with Item 361 “Repair of Concrete Pavement.”

7029.4 MEASUREMENT.

This Item shall be measured by each manhole or inlet repaired complete.

7029.5 PAYMENT.

The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” shall be paid at the unit price bid for “Repairing Manholes”, “Repairing Inlets”, or “Repairing Manholes and Inlets.” This price is full compensation for furnishing all materials, including rings, frames, covers, plates, or grates, tools, equipment, labor, and incidentals necessary to complete the work.

The descriptions and units for this Item are:

Repairing Manholes Each Repairing Inlets Each Repairing Manholes and Inlets Each

NOTE: This Item requires other Standard and Special Specifications

Item 361 “Repair of Concrete Pavement” Item 4011 “Brick Manholes” Item 465 “Concrete Manholes and Junction Boxes” Item 466 “Inlets”

END OF ITEM 7029

08-21

ITEM 7037

CLOSED CIRCUIT TELEVISION (CCTV) INSPECTION

OF DRIVEWAY CULVERTS OR REINFORCED BOX CULVERTS

AND/OR STORM SEWER SYSTEMS

(INCLUDING CLEANING)

7037.1 DESCRIPTION.

The Contractor shall furnish all materials, labor and equipment necessary for the inspection, of the existing constructed driveway culverts, reinforced box culverts and/or storm sewer systems or indicated on drawings provided by Harris County, or other sources. Cleaning or dewatering required in order to do the inspection is included in this item. Where drawings are not available, the Contractor shall provide sketches indicating the size, orientation and size of the storm sewer components, including manholes, inlets or other features.

Inspection shall be by means of a closed circuit television inspection; and be documented in a written report, narration, including electronic media of the televised inspection.

7037.2 DEFINITIONS.

Manholes and Inlets. Indicate location of manholes, inlets or other storm sewer components; including size, material type and orientation.

Pipe Run/Storm Sewer. Continuous lengths/segments of pipe or boxes that run between manholes, inlets, outfall and other features.

Lateral Pipe and/or Lead Pipe. The Pipe connecting an inlet to a manhole and/or a junction box; typically used in curb and gutter street design used in boulevard or subdivision roadway designs.

Outfall Pipe. A section of pipe run from a manhole to an outfall ditch.

7037.3 REQUIREMENTS.

Harris County. Harris County shall provide at no cost to the Contractor the following items during the entire project:

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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 rights-of-way.

B. Drawings. A set of “as-built” drawings indicating the location of the storm sewer system to be inspected, along with identification of the manholes, inlets, outfalls and all pipe runs, where available.

Contractor.

A. Prior to beginning the televising of the storm sewer system, a video sign board or teleprompter shall be filmed showing the name of the project, the date, and time filming begins.

B. The Contractor shall provide Traffic Control based on the requirements of the area.

C. The Contractor shall coordinate with Item 7032 “Cleaning of Driveway Culverts and Storm Sewer Systems (without CCTV Inspection)” concerning cleaning of storm sewer systems and driveway culverts prior or in conjunction with the CCTV inspection.

7037.4 CONSTRUCTION.

Equipment and Procedures. A self contained and air conditioned mobile trailer or van shall be provided which is large enough to accommodate representatives of 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 and/or DVDR, computer, 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, recorded on DVD or other electronic media.

Perform cleaning prior to performing closed circuit television inspection.

Cleaning shall include utilizing variable water pressure nozzles, up to 3,000 psi. The CCTV contractor shall remove, collect, transport, and dispose of sand, debris, and liquid wastes to legal disposal sites.

The Contractor may periodically decant and dispose of excessive water from the operation, but this liquid must be screened and discharged at the outfall. The resulting/remaining sludge and solids will be removed form site and disposed of accordingly.

If the Contractor opts to use drying beds or other means of reducing the liquid content of the materials to be disposed of, it is at their cost.

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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 or box culvert. The Contractor shall provide suitable lighting system to allow all features and condition of the pipe to be clearly visible on the colored DVD media.

The television inspection shall be performed on one manhole section at a time.