Otoe-Missouria_WL200383_Specs.pdf

OK 12-T10 Otoe-Missouria Tribe Water Main May 13, 2020 Noble County, OK

Author: Patty S. Thompson, PE PROJECT TITLE File: Otoe-Missouria Tribe Water Main Page 1 of 106

SECTION 00 01 00.0000

PROJECT TITLE

OTOE-MISSOURIA TRIBE WATER SYSTEM IMPROVEMENTS

SANITATION FACILITIES CONTRUCTION

FOR

OTOE-MISSOURIA TRIBE OF INDIANS, OKLAHOMA

NOBLE COUNTY, OKLAHOMA

IHS PROJECT NO. OK 12-T10

SPECIFICATIONS

U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICES

INDIAN HEALTH SERVICE

OKLAHOMA CITY AREA INDIAN HEALTH SERVICE

OFFICE OF ENVIRONMENTAL HEALTH AND ENGINEERING

DIVISION OF SANITATION FACILITIES CONSTRUCTION

PAWNEE OEH&E FIELD OFFICE

Permit Number:

Date Received:

WL000052200383

June 24 2020

STATE OF OKLAHOMA

Department of Environmental Quality

APPROVED

Rocky W. Chen, P.E.

Water Quality Division

Arya Simon, P.E.

Construction Permitting Section

June 29 2020

Author: Patty S. Thompson, PE SEAL PAGE File: Otoe-Missouria Tribe Water Main Page 2 of 106

SECTION 00 01 07.0000

SEALS PAGE

I certify under penalty of law that this document and all attachments were prepared under my direction or direct supervision.

CONTACT INFORMATION

Patty S. Thompson, P.E., Senior Environmental Engineer Pawnee Indian Health Service

Office of Environmental Health and Engineering 1201 Heritage Circle Pawnee, OK 74058

Telephone Number: 918-762-6588

Author: Patty S. Thompson, PE TABLE OF CONTENTS File: Otoe-Missouria Tribe Water Main Page 3 of 106

SECTION 00 01 10.0000

TABLE OF CONTENTS

SECTION NUMBER - TITLE

Section 00 01 00.0000 - Project Title Page

Section 00 01 07.0000 - Seal Page

Section 00 01 10.0000 - Table of Contents

Section 00 01 15.0000 - List of Drawing Sheets

Section 01 11 00.0000 – Summary of Work

Section 01 22 00.0000 – Unit Prices

Section 01 31 00.0000 – Project Management and Coordination

Section 01 33 00.0000 – Submittal Procedures

Section 01 33 23.0000 – Shop Drawings

Section 01 42 19.0000 - Reference Standards

Section 01 43 00.0000 – Quality Assurance

Section 01 77 00.0000 – Closeout Procedures

Section 01 78 00.0000 – Closeout Submittals

Section 01 78 01.0000 – Warranties

Section 03 30 53.0000 – Miscellaneous Cast-In- Place Concrete

Section 31 22 13.0000 – Rough Grading

Section 31 22 16.0000 – Fine Grading

Section 31 23 16.1300 – Trenching

Section 31 23 16.2600 – Rock Removal

Section 31 23 23.1300 – Backfill

Section 31 23 23.2300 – Compaction

Section 32 92 00.0000 – Turf and Grasses

Section 33 05 23.2001 – Horizontal Boring and Casing

Section 33 05 23.2201 – Utility Horizontal Directional Drilling PE Pipe

Section 33 05 23.2202 – Utility Horizontal Directional Drilling Water Crossings

Section 33 11 13.0001 – Disinfection of Public Utility Water Distribution Piping

Section 33 11 13.2510 – Public Water Distribution Piping Polyvinyl Chloride Pipe

Section 33 11 13.2541 – Public Water Utility Distribution Polyvinyl Chloride Pipe Fittings

Section 33 12 16.0001 – Public Water Utility Distribution Air Relief Valves

Section 33 12 16.1038 – Public Water Utility Distribution Gate Valves

Section 33 12 19.1000 – Public Water Utility Distribution Flush Hydrants

Author: Patty S. Thompson, PE DRAWING

SHEETS

File: Otoe-Missouria Tribe Waterline Replacement Page 4 of 106

SECTION 00 01 15.0000

LIST OF DRAWING SHEETS

SHEET NUMBER TITLE

Cover Sheet and Location Map

Notes and Legend

3 Site Layout

4 Plan & Profile: Water Main Sta: 0+00 to 18+00

Plan & Profile: Water Main Sta: 18+00 to 32+10

Details

Details

Author: Patty S. Thompson, PE SUMMARY OF WORK File: Otoe-Missouria Tribe Water Main Page 5 of 106

SECTION 01 11 00.0000

SUMMARY OF WORK

PART 1 GENERAL

1.01 SUMMARY

A. Provide the following to complete the work in these Specifications and Contract Drawings:

1. Tools.

2. Equipment.

3. Materials.

4. Labor.

5. Supplies.

6. Manufactured articles.

7. All transportation to complete the work.

8. Temporary facilities.

B. Incidentals Items: Furnish all work, materials, and services not expressly provided by others or not expressly called for in the contract, but which are necessary for the completion of the work.

1.02 SITE LOCATION

A. Location:

1. Otoe-Missouria Tribal Campus, 23125 Windmill Rd, Red Rock, OK 74651, Noble County, Oklahoma.

1.03 SUMMARY OF WORK TO BE DONE BY CONTRACTOR

A. Install approximately 3,200 linear feet of 6-inch diameter SDR 21 PVC water line and appurtenances to the Otoe-Missouria Tribe water system.

B. Community Water System: Otoe-Missouria Tribe of Oklahoma Authority.

1.04 TRIBAL REGULATIONS

A. Comply with Tribal regulations related to the completion of the work including:

1. Acquisition of necessary permits.

2. Payment of Tribal TERO taxes (if required).

Author: Patty S. Thompson, PE SUMMARY OF WORK File: Otoe-Missouria Tribe Water Main Page 6 of 106

1.05 ADDITIONAL INFORMATION

A. For technical questions contacts:

Jeffrey Earnest Oklahoma City Area Indian Health Service 701 Market Drive Oklahoma City, OK 73114 Phone (405) 951-3740 Email: jeffrey.earnest@ihs.gov

B. Field office (engineering) contacts:

Patty S. Thompson, P.E.

Pawnee Indian Health Service 1201 Heritage Circle Pawnee, OK 74058 Phone (918) 762-6588 Email: patty.thompson@ihs.gov

Caylen Willingham, E.I.T.

Pawnee Indian Health Service 1201 Heritage Circle Pawnee, OK 74058 Phone: (918) 762-6582 Email: caylen.willingham@ihs.gov

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION (Not Used)

END OF SECTION

Author: Patty S. Thompson, PE UNIT PRICES File: Otoe-Missouria Tribe Water Main Page 7 of 106

SECTION 01 22 00.0000

UNIT PRICES

PART 1 GENERAL

1.01 SUMMARY

A. Work covered by this section includes:

1. Method of measurement.

2. Basis of payment.

1.02 PAYMENT

A. Payment is for completed and accepted work, including incidentals, performed in strict accordance with the drawings and specifications.

B. Unless otherwise noted, mobilization and demobilization of equipment are included in the bid price of each item.

C. Payment includes:

1. Mobilization and demobilization of equipment and materials.

2. Labor.

3. Materials.

4. Equipment.

5. Tools.

6. Testing equipment.

7. General requirements in Division 01.

a. Submittals.

b. Record drawings.

c. Temporary facilities and controls.

d. Operation and maintenance manuals.

D. See individual sections for payment details.

PART 2 PRODUCTS (not used).

PART 3 EXECUTION (not used).

Author: Patty S. Thompson, PE UNIT PRICES File: Otoe-Missouria Tribe Water Main Page 8 of 106

Author: Patty S. Thompson, PE PROJECT MANAGEMENT AND COORDINATION File: Otoe-Missouria Tribe Water Main Page 9 of 106

SECTION 01 31 00.0000

PROJECT MANAGEMENT AND COORDINATION

PART 1 - GENERAL

1.01 SUMMARY

A. Section includes construction scheduling and coordination.

PART 2 - PRODUCTS (Not applicable)

PART 3 - EXECUTION

3.01 MANDATORY PRE-CONSTRUCTION CONFERENCE

A. Representatives from the following shall attend:

1. Prime Contractor

2. Project Engineer

3. Contracting Officer’s Representative

B. Additional representatives, tribal government personnel, and subcontractors may attend.

C. The Project Engineer shall arrange the location, date, and time of the meeting.

D. The Contractor is responsible for notifying subcontractors of meeting time and date.

3.02 CONSTRUCTION SCHEDULE

A. Provide the Project Engineer with a written construction schedule including the anticipated start and completion dates of each major work item.

B. Present the schedule to the Project Engineer at the pre-construction meeting.

C. Notify the Project Engineer three full business days in advance of any start of construction.

D. Submit major changes to the schedule to the Project Engineer in writing.

Author: Patty S. Thompson, SUBMITTAL PROCEDURES File: Otoe-Missouria Tribe Water Main Page 10 of 106

SECTION 01 33 00.0000

SUBMITTAL PROCEDURES

PART 1 GENERAL

1.01 SUMMARY

A. Section includes submittal procedures.

B. Related Requirements:

1. Section 01 78 00.0000 – Closeout Submittals.

PART 2 PRODUCTS (Not Used).

PART 3 EXECUTION

3.01 SUBMITTAL PROCEDURES

A. The required submittals are listed in PART 2 PRODUCTS of each section.

B. Provide one copy of each submittal to the Project Engineer.

1. Copies may be any one of the following:

a. Emailed:

1) Downloads from the manufacturer’s web site (preferred).

2) Scanned from hard copies (300 dpi black and white minimum).

b. Mailed:

1) Patty S. Thompson, P.E., Indian Health Service, Pawnee OEH&E Field Office, 1201 Heritage Circle, Pawnee, OK 74058.

C. Identify each cut sheet or shop drawing with the following information:

1. Contract or Purchase Order number.

2. Supplier.

3. Specification Section number.

D. Submit the following information (if applicable):

1. Manufacturer’s cut sheets: Show compliance with references (e.g. applicable ASTM, AWWA standards).

Author: Patty S. Thompson, SUBMITTAL PROCEDURES File: Otoe-Missouria Tribe Water Main Page 11 of 106

2. Laboratory results and any other information necessary to show compliance with the specifications.

E. Identify variations from the Contract Documents and product or system limitations that may be detrimental to successful performance of the completed work.

F. Identify and re-submit all changes made since previous submittal.

G. Distribute copies of approved submittals to concerned parties, (i.e. suppliers, sub-contractors).

H. Communicate in writing any inability to comply.

I. Allow three weeks for submittal approval.

J. Replace unapproved materials at the Contractor’s expense.

Author: Patty S. Thompson, P.E. SHOP DRAWINGS File: Otoe-Missouria Tribe Water Main Page 12 of 106

SECTION 01 33 23.0000

SHOP DRAWINGS

A. Section includes shop drawings.

1. Section 01 33 00.0000 – Submittal Procedures.

2. Section 01 78 00.0000 – Closeout Submittals.

PART 2 PRODUCTS (Not Used).

3.01 SUBMITTAL PROCEDURES

A. The required shop drawings are listed in PART 2 - PRODUCTS of each section.

B. Provide three copies of each shop drawing to the Project Engineer.

C. Identify each shop drawing with the following information:

1. Contract or Purchase Order number.

2. Supplier or fabricator.

3. Specification Section number.

D. Submit the following information (if applicable):

1. Manufacturer’s cut sheets: Show compliance with references (e.g. applicable ASTM, AWWA standards).

2. Laboratory results.

3. Dimensional or shop drawings.

4. Any other information necessary to show compliance with the specifications.

E. Identify variations from the Contract Documents and product or system limitations that may be detrimental to successful performance of the completed work.

1. Communicate, in writing, any inability to comply.

F. Identify and re-submit all changes made since previous submittal.

G. Distribute copies of approved shop drawings to concerned parties, (i.e. suppliers, sub-contractors).

Author: Patty S. Thompson, P.E. SHOP DRAWINGS File: Otoe-Missouria Tribe Water Main Page 13 of 106

H. Allow three weeks for approval.

Author: Patty S. Thompson, P.E REFERENCE STANDARDS File: Otoe-Missouria Tribe Water Main Page 14 of 106

SECTION 01 42 19.0000

REFERENCE STANDARDS

Part 1 GENERAL

A. Section includes:

1. Organizations, associations, or appropriate agencies with jurisdiction that have references, standards, laws, or regulations cited in these specifications.

1.02 REFERENCES, STANDARDS, LAWS, OR REGULATIONS CITED IN THESE

SPECIFICATIONS

A. Use latest revision of all references, standards, laws, or regulations.

1.03 LIST OF ORGANIZATIONS, ASSOCIATIONS & AGENCIES

A. National Standards Organizations & Associations

American Association of State Highway and Transportation Officials (AASHTO) 444 North Capital Street NW, Suite 249 Washington DC, 20001

(202) 624-5800 www.aashto.org

American Concrete Institute (ACI) ACI International PO Box 9094 Farmington Hills, Michigan 48333-9094

(810) 848-3700 www.aci-int.org

American Society for Testing and Materials (ASTM) 100 bar Harbor Drive West Conshohocken, Pa 19428-2959

(610) 832-9585 www.astm.org

American Water Works Association AWWA 6666 West Quincy Avenue Denver, CO 80235

(303) 794-7711 www.awwa.org

National Electric Code (NEC) National Fire and Protection Association 1 Batterymarch Park Quincy, MA 02269-9959 1 888 632-2633 www.nec.com

National Electrical Manufacturer’s Association

(NEMA)

1300 North 17th Street Rosslyn, VA 22209

(703) 841-3200 www.nema.org

Underwriters’ Laboratories, Inc. UL 333 Pfingston Road Northbrook, IL 60062

(847) 272-8800 www.ul.com

Author: Patty S. Thompson, P.E REFERENCE STANDARDS File: Otoe-Missouria Tribe Water Main Page 15 of 106

Federal Agencies

Environmental Protection Agency (EPA) Region 6 1445 Ross Avenue Dallas, TX 75202 www.epa.gov/r6water/

Occupational Health and Safety Administration Region 6 (OSHA) 525 Griffin Street, Suite 602 Dallas, TX 75202 www.osha.gov

B. State Agencies

Oklahoma Department of Environmental Quality

(ODEQ)

707 N. Robinson P.O. Box 1677

OKC, OK 73102-6010

www.deq.state.ok.us

Oklahoma Water Resources Board

(OWRB)

3800 North Classen Blvd.

Oklahoma City, OK 73118 405-530-8800 www.owrb.ok.gov

Author: Patty S. Thompson, PE QUALITY ASSURANCE File: Otoe-Missouria Tribe Water Main Page 16 of 106

SECTION 01 43 00.0000

QUALITY ASSURANCE

1. Prerequisites and procedures to assure the quality of construction.

1. Section 01 78 36.0000 – Warranties (if applicable).

1.02 QUALITY ASSURANCE

A. Perform work under the direction of personnel licensed in the state in which construction is located and where licensing of the trade is regulated by the state including:

1. Plumbing.

2. Well drilling.

3. Septic system installation.

4. HVAC.

5. Rock blasting.

6. Electrical work.

B. Control of Installation:

1. Perform work in accordance with the specifications.

2. Comply fully with manufacturers’ instructions.

C. If manufacturers’ instructions conflict with contract documents, request clarification from

Project Engineer before proceeding.

D. Correct defective work to conform to the applicable specification.

1.03 DELIVERY, STORAGE, AND HANDLING

A. Inspect materials for acceptability when delivered to the site.

B. Store and handle materials to prevent damage.

1.04 WARRANTY

Author: Patty S. Thompson, PE QUALITY ASSURANCE File: Otoe-Missouria Tribe Water Main Page 17 of 106

A. Provide a minimum one-year warranty for all materials and labor, covering defects in the materials or deficiencies resulting from contractor installation.

B. Provide additional warranties as required by other sections.

PART 2 PRODUCTS (not used).

PART 3 EXECUTION (not used).

Author: Patty S. Thompson, PE CLOSEOUT PROCEDURES File: Otoe-Missouria Tribe Water Main Page 18 of 106

SECTION 01 77 00.0000

CLOSEOUT PROCEDURES

PART 1 GENERAL

1.01 SUMMARY

A. Section includes information on closeout procedures and site cleanup.

B. Related Requirements:

1. Section 01 78 00.0000 – Closeout Submittals.

1.02 ADMINISTRATIVE REQUIREMENTS

A. Final Inspection:

1. Send written certification that work is complete and ready for Final Inspection to the Project Engineer.

2. The Project Engineer shall schedule the Final Inspection at a day and time convenient to all parties.

3. Provide Record Drawings at the Final Inspection.

1.03 SITE CONDITIONS

A. Complete clean up before the Final Inspection.

B. Remove waste and erosions control devices, surplus materials, rubbish, and construction facilities from the site.

C. Punch List:

1. The ContractingEngineer shall provide a letter to the Contractor listing the deficiencies noted during the Final Inspection

2. Correct the deficiencies in conformance with the Specifications and Contract Drawings.

PART 2 PRODUCTS (not used)

PART 3 EXECUTION (not used)

Author: Patty S. Thompson, PE CLOSEOUT SUBMITTALS File: Otoe-Missouria Tribe Water Main Page 19 of 106

SECTION 01 78 00.0000

CLOSEOUT SUBMITTALS

1. The requirements for closeout submittals including:

a. Record drawings (as-builts)

b. Warranty information

c. General operation and maintenance information (if applicable)

2. Section 01 77 00.0000 – Closeout Procedures.

1.02 DELIVERY

A. Provide all closeout submittals meeting this specification and specific requirements of each section.

1. Provide in required form.

2. Required before final payment is made.

1.03 DEFINITIONS

A. Record Drawings (as-builts) showing:

1. The actual installation of facilities.

2. Changes from the plans with enough detail so that the facility can readily be located.

B. Ties: Measurements from permanent easily located objects to an installed object.

PART 2 PRODUCTS (not used)

3.01 RECORD DRAWINGS

A. Provide record data in one of the following manners:

1. On a set of project drawings, neatly draw swing tie measurements and changes.

2. On separate 8½ by 11 sheets, neatly draw site sketches, structure sketches, etc., indicating the necessary information.

Author: Patty S. Thompson, PE CLOSEOUT SUBMITTALS File: Otoe-Missouria Tribe Water Main Page 20 of 106

3.

B. Provide three swing tie measurements to all buried utility objects that may need to be located in the future including the following:

1. Gate valves.

2. Corporation stops.

3. Curb stops.

4. Water main fittings.

5. Couplings to existing water systems.

6. Cleanouts.

7. Sewer wyes.

8. Utility crossings.

9. Septic tank manholes and access covers.

10. Corners of drainfields.

C. Provide offset measurements and depths for buried utilities (e.g. water main) installed parallel to roads.

D. Provide revised elevation data for all items that have elevations shown on the plan drawings, including the following:

1. Manhole inverts (inlet and outlet).

2. Manhole rims.

3. Pump station wet well and valve vault inverts.

4. Pump station wet well and valve vault rims.

5. Pump station wet well and valve vault pipe penetrations.

6. Float elevations.

7. Septic tank elevations.

8. Elevations of pipe entering and leaving structures.

9. Other elevations indicated on profiles.

E. Provide bid schedule installed item quantities for individual facilities on 8½ X 11 sheets.

Author: Patty S. Thompson, PE CLOSEOUT SUBMITTALS File: Otoe-Missouria Tribe Water Main Page 21 of 106

1. Project Engineer may supply standard IHS forms for use by the Contractor.

Author: Patty S. Thompson, PE WARRANTIES File: Otoe-Missouria Tribe Water Main Page 22 of 106

SECTION 01 78 01.000

WARRANTIES

PART 1 - GENERAL

1. Preparation and submittal

2. Time and schedule of submittals

1.02 RELATED SPECIFICATION

A. Section 01330 - Submittals B. Section 01770 – Closeout Procedures C. Section 01780 – Closeout Submittals

PART 2 - PRODUCTS (Not Applicable)

PART 3 - EXECUTION

3.01 PREPARATION OF SUBMITTALS

A. Obtain warranties executed in duplicate by responsible subcontractors, suppliers, and manufacturers, within ten business days after completion of the applicable item or work.

B. Unless otherwise approved, Warranty date is the Date of Substantial Completion.

C. Verify that documents contain full information required.

D. Specifically identify the warranty expiration date for each submittal. Retain warranties for the time specified for that submittal.

E. Submit under provisions of Section 01780 – Closeout Submittals.

3.02 TIME OF SUBMITTAL

A. For equipment or component parts of equipment put into service during construction submit documents within ten business days after installation and approval by the Project Engineer.

B. Submit other documents within ten business days after Date of Substantial Completion and prior to final Application for Payment.

C. For items of work when acceptance is delayed beyond Date of Substantial Completion, submit within ten business days after acceptance, listing the date of acceptance as the beginning of the warranty period.

Author: Patty S. Thompson, PE WARRANTIES File: Otoe-Missouria Tribe Water Main Page 23 of 106

Author: Patty S. Thompson, PE ISCELLANEOUS CAST IN PLACE CONCRETE File: Otoe-Missouria Tribe Water Main Page 24 of 106

SECTION 03 30 53.0000

MISCELLANEOUS CAST-IN- PLACE CONCRETE

A. This section includes provisions for miscellaneous cast-in-place concrete.

1. Section 33 11 31.2510 – Public Water Utility Piping PVC.

2. Section 33 12 16.1038 – Water Utility Distribution Gate Valves.

1.02 PRICE AND PAYMENT PROCEDURE

A. The cost of the concrete is incidental to the item installed.

1. There is no separate payment for the concrete.

1.03 REFERENCES

A. ASTM C33 – Standard Specification for Concrete Aggregates.

B. ASTM C94 – Standard Specification for Ready Mix Concrete.

C. ASTM C144 – Standard Specification for Mortar Aggregate.

D. ASTM C150 – Standard Specification for Portland Cement.

E. ASTM A185 – Welded Steel Wire Fabric, Plain for Concrete Reinforcement.

F. ASTM A615 – Deformed and Plain Billet-Steel Bars for Concrete Reinforcement.

1.04 QUALITY ASSURANCE

A. Obtain cement and aggregate from the same source for all work.

B. Perform work in accordance with ACI 301.

1.05 DELIVERY, STORAGE, AND HANDLING

A. Delivery:

1. Ready Mix Concrete:

a. Deliver and mix in accordance with ASTM C94.

B. Storage:

Author: Patty S. Thompson, PE ISCELLANEOUS CAST IN PLACE CONCRETE File: Otoe-Missouria Tribe Water Main Page 25 of 106

1. Prevent deterioration or intrusion of foreign matter.

PART 2 PRODUCTS

2.01 MATERIALS

A. Cement: ASTM C150, Portland Cement Type – I.

B. Aggregates shall be clean, hard, tough, water sound and free of deleterious substances.

C. Mixing Water

1. Use potable water unless approved by Project Engineer.

D. METAL REINFORCEMENT

1. Rebar: Conforming to ASTM A615

2. Welded Wire Fabric: Conform to ASTM A185

2.02 QUALITY CONTROL

A. Provide a compressive strength of 2,500 psi at 28 days unless otherwise noted on the Drawings.

3.01 PREPARATON

A. Forms:

1. Conform to shapes, lines and dimensions of members as called for on the plans.

2. Sufficiently tight to prevent leakage of concrete.

3. Properly brace and tie.

B. Remove excess water before concrete is placed.

C. Moisten subgrade before placing concrete.

D. For job mixed concrete:

1. Mix the materials until they are uniformly distributed.

3.02 INSTALLATION

A. PLACING CONCRETE

1. Place concrete in one continuous operation.

Author: Patty S. Thompson, PE ISCELLANEOUS CAST IN PLACE CONCRETE File: Otoe-Missouria Tribe Water Main Page 26 of 106

2. Remove supporting forms and shoring after members have acquired sufficient strength to support their weight and imposed loads safely.

3. Concrete temperature shall not be less than 45 degrees Fahrenheit at the time of placement.

a. Do not heat aggregates and water used for mixing to a temperature exceeding 120 degrees Fahrenheit.

3.03 PROTECTION

1. Maintain concrete temperature of not less than 45 degrees Fahrenheit, or more than 70 degrees Fahrenheit, for a period of four days.

2. Do not add chemical or other foreign material to the concrete mix.

Author: Patty S. Thompson, PE ROUGH GRADING File: Otoe-Missouria Tribe Water Main Page 27 of 106

SECTION 31 22 13.0000

ROUGH GRADING

PART 1 GENERAL

1.01 SUMMARY

A. Section includes:

1. Rough and finished site grading of areas disturbed during construction.

B. Related requirements:

1. Section 31 23 16.1300 – Trenching

1.02 MEASUREMENT AND PAYMENT

A. Work is incidental to buried utilities.

B. No separate payment shall be made.

PART 2 PRODUCTS (Not applicable)

PART 3 EXECUTION

3.01 ROUGH GRADING

A. Grade site to prevent surface water from flowing into excavations and trenches.

B. Maintain existing drainage.

C. Remove any water accumulated in the excavation by pumping or other approved method.

D. If sub-grade is altered, restore to its proper bearing capacity at Contractor’s expense.

Author: Patty S. Thompson, PE FINE GRADING File: Otoe-Missouria Tribe Water Main Page 28 of 106

SECTION 31 22 16.0000

FINE GRADING

1. Fine site grading of areas disturbed during construction.

PART 2 - PRODUCTS (Not Used)

3.01 FINE GRADING

A. Grade after all structures and piping are installed.

B. Grade site to true grades as shown on the plans.

C. Ensure that drainage is away from structures.

D. Dress and trim all slopes for a uniform and smooth appearance.

Author: Patty S. Thompson, PE TRENCHING File: Otoe-Missouria Tribe Water Main Page 29 of 106

SECTION 31 23 16.1300

TRENCHING

PART 1 GENERAL

3.02 SUMMARY

A. Section includes:

1. Trenching necessary for the construction of the facilities as indicated on the drawings including the following:

a. Water mains and service lines.

B. Related Requirements:

1. Section 31 22 13.0000 – Rough Grading.

2. Section 31 22 16.0000 – Fine Grading.

3. Section 31 23 16.1300 – Trenching.

4. Section 31 23 16.2600 – Rock Removal.

5. Section 31 23 23.1300 – Backfill.

6. Section 31 23 23.2300 – Compaction

3.03 MEASUREMENT AND PAYMENT

A. Trenching is incidental to installation of buried utilities.

B. No separate payment shall be made.

3.04 REFERENCES

A. Reference latest manual revision or ASTM standard.

B. ASTM D698 – Test Method for Laboratory Compaction Characteristic of Soil Using Standard Effort.

C. ASTM D1556 – Test Method for Density and Unit Weight of Soil in Place by the Sand-Cone Method.

D. ASTM D1557 – Test Method for Laboratory Compaction Characteristics of Soil Using Modified Effort.

E. ASTM D2922 – Test Method for Density of Soil and Soil Aggregate in Place by Nuclear Methods.

F. ASTM D2487 – Classification of Soils for Engineering.

G. ASTM D3017 – Test Method for Water Content of Soil and Rock in Place by Nuclear Methods.

Author: Patty S. Thompson, PE TRENCHING File: Otoe-Missouria Tribe Water Main Page 30 of 106

3.05 SUBMITTALS (if required)

A. Barricades and lights

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION

3.01 GENERAL

A. Conform to recommended safety standards, identified OSHA 1910 and 1926.

B. No workers may enter any trench or excavation without the prior approval of the Competent Person on site.

C. Obtain all permits from appropriate road agency for construction within road right of way.

D. Repair damage resulting from settlement, slides, cave-ins, water pressure, and other causes.

E. Provide adequate signs, barricades, fences, and amber lights and take all necessary precautions to protect the work and the safety of the public in all construction areas.

1. Placement of construction signs and barricades shall conform to the “Manual on Uniform Traffic Control Devices,” 2009 Edition with Revision Numbers 1 and 2 incorporated, dated May 2012 (PDF).

2. Protect barricades and obstructions at night by amber signal lights that burn from sunset to sunrise.

3. Barricades

a. White or with reflective paint to increase their visibility at night.

b. Commercial grade.

4. Minimize obstruction to traffic and inconvenience to the public and residents near the work.

F. Road, Driveway, and Sidewalk Crossing:

1. Comply with all construction and material requirements of roadway authorities having jurisdiction.

2. Maintain one open lane of traffic at all times.

3.02 PREPARATION

A. Layout and Staking:

1. Lines staked by the Project Engineer.

2. Notify the Project Engineer at least three business days in advance of the times and places that stakes and benchmarks shall be required.

Author: Patty S. Thompson, PE TRENCHING File: Otoe-Missouria Tribe Water Main Page 31 of 106

3. Preserve stakes and benchmarks when set. Re-staking for disturbed or displaced stakes shall be at the Contractor’s expense.

B. Close no road or street without permission of the proper authority.

C. Keep fire hydrants accessible.

D. Ensure that gutters, sewer inlets, drainage, and irrigation ditches are kept functional.

3.03 PROTECTION OF EXCAVATION

A. Provide suitable sheathing, shoring, and/or bracing to:

1. Prevent excavation from caving.

2. Provide safe working conditions to protect workers and property.

B. Repair damage resulting from settlement, slides, cave-ins, and water infiltration at

Contractor’s expense.

3.04 GENERAL EXCAVATION

A. Excavate by open cut method unless otherwise approved by the Project Engineer or as required by applicable encroachment permits.

B. Remove and stockpile existing topsoil and suitable backfill.

C. Dispose of unsuitable backfill at the location shown in the Drawings or as approved by the

Project Engineer.

D. Dispose of excess material, including rock, broken concrete and bituminous materials, debris, at the location shown in the Drawings or as approved by the Project Engineer.

3.05 PIPE LINE EXCAVATION

A. Install facilities as staked unless otherwise approved by Project Engineer.

B. Maintain surface drainage away from trenching or excavation.

1. Conform to Section 31 22 13 - Rough Grading.

3.06 TRENCHING

A. Bottom width: No less than 12 inches or more than 24 inches wider than the outside diameter of the pipe.

B. Remove large stones, ledge rock, and boulders to provide a 4-inch minimum clearance for all pipes.

C. Keep walls as nearly vertical as soil conditions permit below the top of pipe.

D. Trench width above pipe may be as wide as required for shoring and sheeting, and proper installation of work.

Author: Patty S. Thompson, PE TRENCHING File: Otoe-Missouria Tribe Water Main Page 32 of 106

E. Ensure trench is on proper alignment and center pipe within the trench.

F. Depth: Provide minimum cover identified in the specifications, or to depths shown on drawings.

G. Accurately shape bottom of trench to provide uniform bearing and support for pipe.

H. Excavate bell holes and depressions for joints after bottom of trench is graded.

1. Excavate bell holes and depressions to the minimum length, depth, and width required to make the particular joint.

3.07 REMOVAL OF NUISANCE WATER

A. Remove nuisance water entering the trenches. Nuisance water that can be removed through the use of sump or trash pumps is not considered dewatering.

B. Keep trenches free from water until the facilities are in place, sealed against the entrance of water, and backfill has been placed and compacted above the water level.

3.08 LOCATE EXISTING UTILITIES

A. Locate all existing underground utilities.

1. Utilize state “dig-safe,” “OKIE” or “one-call” hotlines.

2. Contact all other utility owners not covered by the state “dig safe” hotlines.

3.09 UTILITY CONFLICTS

A. Protect existing utilities from damage during excavation and backfilling operations.

B. Provide temporary support for existing water, gas, telephone, power, or other utility services that cross the trench, until backfilling operations have reached the elevation of the utility being crossed.

1. Compact backfill to 95% of Standard Proctor Density under disturbed utilities.

2. Repair or replace any damaged existing utilities at Contractor’s expense.

C. Pipe separation.

1. Horizontal Separation from existing or proposed mains:

a. Maintain a 10-foot horizontal separation (O.D. to O.D.) for the following:

1) Water mains

2) Sewer mains

3) Storm sewers

4) Raw water lines

5) Oil and gas lines

6) Buried electric cables

Author: Patty S. Thompson, PE TRENCHING File: Otoe-Missouria Tribe Water Main Page 33 of 106

b. Maintain a 15-foot horizontal separation for the following:

1) All parts of septic tanks

2) Absorption fields

3) Any other sewage treatment and disposal systems.

c. Maintain a 50-foot horizontal separation from any gas storage tank.

d. Any deviation shall be approved in advance by the Project Engineer and permitting authority.

2. Vertical Separation

a. Vertical crossing with the water main above the sewer main:

1) Maintain a minimum 24-inch vertical separation (O.D. to O.D.) for crossing mains.

2) Lay pipe with joints equidistant from the point of crossing.

b. Vertical crossing with the water main below the sewer main.

1) Maintain a minimum 24-inch vertical separation (O.D. to O.D.) for crossing mains.

2) No sewer line joint closer than 9 feet from the water line.

3) Provide adequate support to prevent damage to the water main.

c. If it is impossible to meet any of the above separation distances and deviations, the following method shall be adhered to:

1) Sewer main shall be constructed to water main pressure pipe standards, and successfully pass a 150-psi pressure test prior to backfilling.

D. Water and sewer service crossing and parallel installation.

1. Maintain a 30-inch horizontal separation from water and sewer services.

2. Maintain a 12-inch vertical separation for crossing water and sewer services.

3. Water service line splices or joints shall not be permitted within 10 feet of a sewer line crossing.

3.10 MOVING FENCES AND MINOR STRUCTURES

A. Remove and reset culverts, drainage pipes, or other minor structures that fall within the alignment of the new construction. Restore to their original location and grade.

B. Visit the project site and determine actual conditions with regard to the existence of old car bodies, abandoned houses, fences, driveways, trees, stumps, brush, sidewalks, approaches, and other miscellaneous obstacles to construction.

Author: Patty S. Thompson, PE TRENCHING File: Otoe-Missouria Tribe Water Main Page 34 of 106

1. No separate payment shall be made for the removal or replacement of these items.

Author: Patty S. Thompson, PE ROCK REMOVAL File: Otoe-Missouria Tribe Water Main Page 35 of 106

SECTION 31 23 16.2600

ROCK REMOVAL

A. This section pertains to the rock excavation necessary for the construction of the facilities as indicated on the plans.

B. Related Requirements

a. Section 31 23 16.1300 – Trenching

b. Section 31 23 23.1300 - Backfill

1.01 MEASUREMENT AND PAYMENT

A. Rock

1. Measurement: Linear feet of trench in which rock was removed measured along the centerline of the pipe.

2. Payment: Shall be full compensation for:

a. Earth Work:

1) Ripping operations.

2) Jackhammering.

3) Over excavation of trench.

4) Removal of rock from site.

B. Imported Backfill

1. Measurement: Linear feet imported backfill installed measured along the centerline of the pipe.

2. Payment: Shall be full compensation for:

a. Earth Work:

1) Backfilling.

2) Compaction.

b. Provision and installation of materials:

1) Imported backfill

1.02 DEFINITION

Author: Patty S. Thompson, PE ROCK REMOVAL File: Otoe-Missouria Tribe Water Main Page 36 of 106

A. Solid Rock

1. Large masses of rock which, in the opinion of the Project Engineer, cannot be excavated without drilling, blasting, ripping equipment or other specialized equipment.

B. Loose Rock

1. Boulders and other detached stones each having a volume of 1-cubic yard or more.

PART 2 - PRODUCTS (NOT APPLICABLE)

3.01 METHODS OF EXCAVATION

A. Rock excavation may be accomplished by any or all of the following methods depending on the rock type:

1. Excavation with earthmoving equipment

2. Rip with a dozer and excavate.

3. Jack hammer and excavate.

3.02 RESPONSIBILITIES

A. Remove excavated rock from site unless otherwise directed by the Project Engineer.

3.03 EXCAVATION, RIPPING, AND JACK-HAMMERING

A. Excavate and/or rip to a minimum 6 inches deeper than the pipe invert.

B. Provide 6 inches clearance from rock on each side of pipe.

C. Backfill with imported bedding materials to a depth of 6 inches above the top of pipe.

D. Refill remaining trench with material in accordance with Section 31 23 23.1300 – Backfill.

1. Use existing soil to the greatest extent possible.

Author: Patty S. Thompson, PE BACKFILL File: Otoe-Missouria Tribe Water Main Page 37 of 106

SECTION 31 23 23.1300

BACKFILL

PART 1 GENERAL

1.01 SUMMARY

A. Section includes:

1. Backfill necessary for the construction of the facilities as indicated on the plans including water mains and service lines, sewer mains and service lines, concrete manholes, septic tanks, and other structures.

B. Related Requirements:

1. Section 31 22 13.000 – Rough Grading.

2. Section 31 22 16.0000 – Fine Grading.

3. Section 31 23 16.1300 – Trenching.

4. Section 31 23 16.2600 – Rock Removal.

1.02 MEASUREMENT AND PAYMENT

A. Backfilling is incidental to installation of buried utilities.

1. No separate payment shall be made.

B. Imported Bedding

1. Measurement: linear feet of imported bedding installed in trench measured along the center line of the pipe

2. Payment: Full compensation imported bedding installed:

a. Earthwork including all:

1) Backfilling.

2) Compaction.

3) Removal of excess soil and rock.

4) Site restoration.

b. Provision and installation of materials including:

1) Imported bedding material.

A. Reference latest manual revision or ASTM standard.

Author: Patty S. Thompson, PE BACKFILL File: Otoe-Missouria Tribe Water Main Page 38 of 106

B. Manual on Uniform Traffic Control Devices.

C. ASTM D698 – Test Method for Laboratory Compaction Characteristic of Soil Using Standard Effort.

D. ASTM D1556 – Test Method for Density and Unit Weight of Soil in Place by the Sand-Cone

Method.

E. ASTM D1557 – Test Method for Laboratory Compaction Characteristics of Soil Using Modified Effort.

F. ASTM D2922 – Test Method for Density of Soil and Soil Aggregate in Place by Nuclear

G. ASTM D2487 – Classification of Soils for Engineering.

H. ASTM D3017 – Test Method for Water Content of Soil and Rock in Place by Nuclear

1.04 SUBMITTALS (if required)

A. Imported bedding material

1.05 DEFINITIONS

A. Soil Materials as summarized in the following table and defined in ASTM D2321 and ASTM

D2487.

Description and Comparison of Soil Material Classifications

ASTM D2321 ASTM D2487

Class Type

USCS

Group Symbol Description

IA Manufactured aggregates: ¼ to 1 ½ inch open graded, clean.

* None Closest to “Poorly graded gravel (GP)”

IB Manufactured aggregates: ¼ to 1 ½ inch dense graded, clean.

* None Closest to “Poorly graded gravel with sand (GP)”

II

Coarse sands and gravels with maximum particle size of 1 ½ inch clean.

GW Well-graded gravels and gravel-sand mixtures;

little or no fines.

GP Poorly graded gravels and gravel sand mixtures little or no fines.

SW Well-graded sands and gravelly sands; little or no fines.

SP Poorly graded sands and gravelly sands; little or no fines

Coarse sands and gravels with maximum particle size of 1 ½ inch, borderline clean.

GW-GC

SP-SM

Etc.

Sands and gravels which are borderline between clean and with fines

III

Fine sand and clayey gravels.

GM Silty gravels, gravel-sand-silt mixtures.

GC Clayey gravels, gravel-sand-clay mixtures SM Silty sands, sand-silt mixtures

Author: Patty S. Thompson, PE BACKFILL File: Otoe-Missouria Tribe Water Main Page 39 of 106

SC Clayey sands, sand-clay mixtures

IV

Fine grained soils (inorganic)

ML Inorganic silts and very fine sands, rock flour, silty or clayey fine sands, silts with slight plasticity

CL Inorganic clays of low to medium plasticity, gravely clays, sandy clays, silty clays, lean clays

MH Inorganic silts, micaceous or diatomaceous fine sandy or silty soils, elastic silts

CH Inorganic clays of high plasticity, fat clays.

V

Organic soils

OL Organic silts and organic silty clays of low plasticity

OH Organic clays of medium to high plasticity, organic silts

PT Peat and other high organic soils

* USCS system is limited to naturally occurring soils. Manufactured aggregates not covered.

2.01 BEDDING, HAUNCHING AND INITIAL BACKFILL MATERIAL

A. Class I, Class II or Class III, utilized in accordance with restrictions described in Part 3 - Execution.

3.01 GENERAL

A. Conform to recommended safety standards, identified OSHA 1910 and 1926.

B. No workers may enter any trench or excavation without the prior approval of the Competent Person on site.

C. Provide adequate signs, barricades, fences, and amber lights and take all necessary precautions to protect the work and the safety of the public in all construction areas.

1. Placement of construction signs and barricades shall conform to the “Manual on Uniform Traffic Control Devices.”

2. Protect barricades and obstructions at night by amber signal lights that burn from sunset to sunrise.

3. Barricades

a. White or with reflective paint to increase their visibility at night.

b. Commercial grade.

4. Minimize obstruction to traffic and inconvenience to the public and residents near the work.

D. Road, Driveway, and Sidewalk Crossing:

1. Comply with all construction and material requirements of roadway authorities having jurisdiction.

Author: Patty S. Thompson, PE BACKFILL File: Otoe-Missouria Tribe Water Main Page 40 of 106

2. Maintain one open lane of traffic at all times.

3.02 PREPARATION

A. Close no road or street without permission of the proper authority.

B. Keep fire hydrants accessible.

C. Ensure that gutters, sewer inlets, drainage, and irrigation ditches are kept functional.

3.03 BEDDING

A. If existing soil cannot provide uniform, stable bearing support, over-excavate 4 inches below bottom of pipe or structure.

B. Embedment and the backfill up to 4 inches above the pipe crown shall be done in the presence of the Project Engineer or his/her representative.

1. Violation of this provision shall require the removal and replacement of the backfill at Contractor’s expense, even if backfill was correctly placed and compacted.

C. Compact in lifts not to exceed 6 inches in loose measure.

D. Utilize Class I, II, or III materials as appropriate for bedding as listed in the following table.

Use of Soils and Aggregate for Bedding

Class IA Class IB Class II Class III General Excellent pipe support. Excellent drainage.

Excellent pipe support. Good drainage. Minimizes migration of adjacent material.

Good pipe support. Fair drainage.

Reasonable pipe support. Poor drainage

Compaction Not required Not required Required 85% of Standard Proctor.

Required 90% of Standard Proctor.

Wet Conditions (below current or future water table). Rock Cuts

Acceptable. Shall use same material for Haunching.

Acceptable. Shall use same material for Haunching.

Acceptable. Clean groups only suitable for drainage blanket.

Not- Acceptable

Dry Conditions Acceptable Acceptable Acceptable Acceptable

3.04 HAUNCHING AND INITIAL BACKFILL

A. General

1. Provide imported backfill if native soil is unsuitable for haunching and initial backfill.

a. Unsuitable native soil is defined as solid or loose rock, dry or frozen lumps greater than ¾ inches in diameter (in any dimension), or containing organic material, or any other material that could damage the pipe.

Author: Patty S. Thompson, PE BACKFILL File: Otoe-Missouria Tribe Water Main Page 41 of 106

2. Provide complete and uniform bearing and support for the pipe, including allowance for bell holes, or structure.

3. Work material under and around the pipe to ensure full pipe support.

4. Hand tamp to prevent movement of the pipe during placement of material.

5. Compact in lifts not to exceed 6 inches in loose measure.

6. Avoid contact between the pipe and compaction equipment.

B. Utilize Class I, II, or III materials as appropriate for haunching and initial backfill as listed in the following table. No frozen materials or frozen clods shall be permitted.

Use of Soils and Aggregate for Haunching and Initial Backfill Class IA Class IB Class II Class III

General Excellent pipe support. Excellent drainage. Install to a minimum of 4” above the pipe crown.

Excellent pipe support. Good drainage. Minimizes migration of adjacent material. Install to a minimum of 4” above the pipe crown.

Good pipe support. Fair drainage. Install and compact to a minimum of 6” above the pipe crown.

Reasonable pipe support. Poor drainage. Install and compact to a minimum of 6” above the pipe crown.

Compaction Not required Not required Required 85% of Standard Proctor.

6-inch maximum lifts.

Required 90% of Standard Proctor.

6-inch maximum lifts.

Wet Conditions (below current or future water table). Rock Cuts

Acceptable. Shall use same material for Bedding.

Extend Haunching to the top crown of the pipe.

Acceptable. Shall use same material for Bedding. Extend Haunching to the top crown of the pipe.

Acceptable. Clean groups only suitable for drainage.

Not- Acceptable

Dry Conditions Acceptable Acceptable Acceptable Acceptable

3.05 FINAL BACKFILL

A. Provide imported backfill if native soil is unsuitable for final backfill.

1. Unsuitable native soil is defined as solid or loose rock, dry or frozen lumps greater than 6 inches in diameter (in any dimension) or containing organic material, or any other material that could damage the pipe.

B. Backfill remainder of excavation with native material, free from large clods, large stones, organic material or frost chunks.

C. Compact in 12-inch, loose measure, lifts to a density not less than the density of the surrounding undisturbed soil.

1. Provide 30 inches (minimum) of backfill over the pipe before wheel loading the trench.

2. Wheel roll and mound except as otherwise required by the applicable roadway authority or permits.

Author: Patty S. Thompson, PE BACKFILL File: Otoe-Missouria Tribe Water Main Page 42 of 106

D. Backfill and compact around manholes, valve boxes, and other appurtenances in 12-inch, loose measure lifts.

1. Compact with a mechanical tamper to a density not less than 90% of the maximum dry density, determined by ASTM D 698.

DI. Backfill around septic tanks in 18-inch lifts.

1. Compact in a manner that shall not produce undue strain on the tank.

2. Compaction may be accomplished with the use of water, provided the material is thoroughly wetted from the bottom up, and the tank is filled with water to prevent floating.

DII. Repair any trenches improperly backfilled or where settlement occurs, then refill and compact.

DIII. Restore surface to the required grade and compaction. Conform to Section 31 22 16 – Fine Grading.

DIV. Remove all surplus backfill materials to the location shown in the Drawings or as approved by the Project Engineer.

3.06 REMOVAL OF NUISANCE WATER

A. Remove nuisance water entering the trenches. Nuisance water that can be removed through the use of sump or trash pumps is not considered dewatering.

B. Keep trenches free from water until the facilities are in place, sealed against the entrance of water, and backfill has been placed and compacted above the water level.

3.07 UTILITY CONFLICTS

A. Protect existing utilities from damage backfilling operations.

B. Provide temporary support for existing water, gas, telephone, power, or other utility services that cross the trench, until backfilling operations have reached the elevation of the utility being crossed.

1. Compact backfill to 95% of Standard Proctor Density under disturbed utilities.

2. Repair or replace any damaged existing utilities at Contractor’s expense.

Author: Patty S. Thompson, PE COMPACTION File: Otoe-Missouria Tribe Water Main Page 43 of 106

SECTION 31 23 23.2300

COMPACTION

PART 1 GENERAL

1.01 SUMMARY

A. Section includes:

1. Compaction of excavations, trenching, and backfill necessary for the construction of the facilities as indicated on the drawings including water mains and service lines, sewer mains and service lines, concrete manholes, septic tanks, and other structures.

B. Related Requirements

1. Section 31 22 16.0000 – Fine Grading.

2. Section 31 23 16.1300 – Trenching.

3. Section 31 23 16.2600 – Rock Removal.

4. Section 31 23 23.1300 – Backfill.

1.02 MEASUREMENT AND PAYMENT

A. Compaction is incidental to installation of buried utilities.

B. No separate payment shall be made.

1.03 REFERENCES

A. Reference latest manual revision or ASTM standard.

B. ASTM D698 – Test Method for Laboratory Compaction Characteristic of Soil Using Standard Effort.

C. ASTM D1557 – Test Method for Laboratory Compaction Characteristics of Soil Using Modified Effort.

D. ASTM D2922 – Test Method for Density of Soil and Soil Aggregate in Place by Nuclear Methods.

E. ASTM D2487 – Classification of Soils for Engineering.

F. ASTM D3017 – Test Method for Water Content of Soil and Rock in Place by Nuclear Methods.

1.04 SUBMITTALS (NOT REQUIRED)

1.05 DEFINITIONS

PART 2 Soil Materials as summarized in the following table and defined in ASTM D2321 and ASTM D2487

Author: Patty S. Thompson, PE COMPACTION File: Otoe-Missouria Tribe Water Main Page 44 of 106

PART 3 PRODUCTS (NOT USED)

PART 4 EXECUTION

4.01 GENERAL

A. Conform to recommended safety standards, identified OSHA 1910 and 1926.

B. Minimize obstruction to traffic and inconvenience to the public and residents near the work.

C. Road, Driveway, and Sidewalk Crossing:

1. Comply with all compaction requirements of roadway authorities having jurisdiction.

2. Maintain one open lane of traffic at all times.

4.02 TRENCH COMPACTION

A. HAUNCHING AND INITIAL BACKFILL

1. General

a. Work material under and around the pipe to ensure full pipe support.

b. Hand tamp to prevent movement of the pipe during placement of material.

c. Compact in lifts not to exceed 6 inches in loose measure.

2. Avoid contact between the pipe and compaction equipment.

B. FINAL BACKFILL

1. Thickness of backfill layers exceeding 12 inches may be approved by the Project Engineer based on the type of soil encountered and the field performance of the equipment used.

2. If greater than 12-inch thick compact layers are approved:

a. Hand excavate to the test level at locations designated by the Project Engineer.

b. Refill the test excavation with compacted backfill to the specified density.

3. Reopen any trenches improperly backfilled or where settlement occurs to the depth required for proper compacting, then refilled and compacted at the expense of the contractor.

a. Restore the surface to the required grade and compaction, mounded over and smoothed off or resurfaced as required.

b. Compact all backfill to a density not less than the density of the surrounding undisturbed soil.

c. Surplus materials shall be disposed of as directed by the Project Engineer.

Author: Patty S. Thompson, PE COMPACTION File: Otoe-Missouria Tribe Water Main Page 45 of 106 d.

C. Compact trench backfill within the limits of a roadway to a density not less than 95% of the maximum density determined by ASTM D698 from 12 inches above pipe crown to the surface.

1. Roadways for the purposes of backfilling and compaction include driveways and unimproved roads as well as paved streets and highways.

2. The location of the roadway limits for the purposes of this section shall be established by the Project Engineer in the field and may include highway shoulders and drainage ditches.

D. In lieu of this special compaction the contractor may use, at his expense, well-graded gravel as backfill.

1. The gravel shall be clean and may vary in size from ¼-inch to 1.5-inch with not more than 10% of the material less than ¾-inch in size.

2. The gravel shall be compacted as approved by the Project Engineer.

E. Backfill and compaction around manholes, hydrants, valve boxes and other appurtenances shall be in lifts not to exceed 12 inches.

1. Compact to a density not less than 90% of the maximum density determined by ASTM D 1557.

Author: Patty S. Thompson, PE TURF AND GRASSES File: Otoe-Missouria Tribe Water Main Page 46 of 106

SECTION 32 92 00.0000

TURF AND GRASSES

PART 1 GENERAL

1.01 SUMMARY

A. This section includes topsoiling, seeding, fertilizing, and mulching areas disturbed by construction activities.

B. Related Requirements:

1. Section 01 33 00.0000 – Submittal Procedures.

2. Section 31 23 16.1300 – Trenching.

3. Section 31 23 23.1300 – Backfill.

1.02 MEASUREMENT AND PAYMENT

A. Reseeding of disturbed areas is incidental to trenching.

B. No separate payment shall be made.

1.03 REFERENCES

A. U.S. Department of Agriculture Rules and Regulations under the Federal Seed Act.

1.04 SUBMITTALS

A. Material Submittals:

1.…