PART 1 - GENERAL

1.01 SECTION INCLUDES

A. Pipe.

B. Fittings.

C. Special Fittings.

D. Pipeline Accessories.

1.02 DESCRIPTION OF WORK

A. Construct water mains and building service pipes.

B. Reference is made to the Iowa Department of Transportation Standard Specifications for Highway and Bridge Construction, Series 2001, and all current General Supplemental Specifications and Materials Instructional Memorandum by the term "Iowa DOT Specifications" and/or " Iowa DOT I.M."

1.03 SUBMITTALS

A. Submit under provisions of Division 1.

B. Manufacturer's instructions for installation for all pipe and fittings utilized.

C. Construction sequencing.

D. Catalog cuts, samples, manufacturer's data, and listing of applicable standards for special, unique, or proposed substitute materials, if requested by the Jurisdictional Engineer.

E. Joint restraint system.

F. Project Record Documents.

G. Upon request, the Contractor will provide Material Certifications to the Jurisdictional Engineer.

Follow the General Provisions (Requirements) and Covenants as well as the following:

Submit product information sheet for joint restraint system to be used.

1.04 SUBSTITUTIONS

A. Use only materials conforming to these specifications unless permitted otherwise by the Jurisdictional Engineer.

B. Obtain written approval of the Jurisdictional Engineer for all substitutions prior to use.

Follow the General Provisions (Requirements) and Covenants.

1.05 DELIVERY, STORAGE, AND HANDLING

A. Deliver only materials that fully conform to these specifications or for which submittals have been provided to the Jurisdictional Engineer and approved for use.

B. Store materials in a protected environment, on pallets or lagging.

Follow the General Provisions (Requirements) and Covenants as well as the following:

C. Remove pipe and fittings contaminated with mud and surface water from the site; do not use in construction unless thoroughly cleaned, inspected, and approved by the Jurisdictional Engineer.

D. Avoid damage when handling materials. Replace any damaged materials. Remove damaged materials from the site.

1.06 SCHEDULING AND CONFLICTS

A. Construction Sequence:

1. Attend a preconstruction meeting if required by the Jurisdictional Engineer.
2. Submit plan for construction sequence prior to commencing construction unless specifically not required by the Jurisdictional Engineer.

B. Conflict Avoidance:

1. Expose possible conflicts in advance of construction, such as utility lines and drainage structures. Verify elevations of each and verify clearances for proposed construction.

2. Complete elements of the work that can affect line and grade in advance of other open cut construction unless noted on plans.

3. Notify the Jurisdictional Engineer of any conflicts discovered or any changes needed to accommodate unknown or changed conditions.

Follow the General Provisions (Requirements) and Covenants.

1.07 SPECIAL REQUIREMENTS

A. Stop Work: Stop work and notify the Jurisdictional Engineer immediately if contaminated soils, historical artifacts, or other environmental or historic items are encountered.

B. Conform to local, state, and federal requirements.

None.

1.08 MEASUREMENT FOR PAYMENT

All measurements for payments will be made by the Jurisdictional Engineer or authorized representative.

A. Water Main:

1. Measurement of pipe will be along the centerline of the pipe, including the length through the fittings, installed according to the plans.

2. For water main installed within casing pipe, measurement will be the length of casing and carrier pipes, along the centerline of the casing. Payment will be made for both carrier and casing pipes as a single unit for the appropriate method of installation.

3. Payment will be made at the unit bid price for each type and size of pipe properly installed.

4. Trench and backfill and trenchless construction, tracer system, testing, disinfection, and polyethylene wrap for ductile iron pipe and fittings are incidental to this item.

1. Trenched:

a. Measurement: Each type and size of pipe properly installed in an open trench will be measured in linear feet along the centerline of the pipe, including the length through the fittings.
b. Payment: Payment will be made at the unit price for each type and size of pipe properly installed.
c. Includes: Unit price includes, but is not limited to, trench excavation, dewatering, furnishing bedding material, placing bedding and backfill material, tracer system, testing, disinfection, and polyethylene wrap for ductile iron pipe and fittings.

2. Trenchless:

a. Measurement: Each type and size of pipe properly installed by trenchless methods will be measured in linear feet along the centerline of the casing pipe. Additional pipe installed beyond the length specified in the contract documents will not be measured unless the Engineer provides prior authorization.
b. Payment: Payment will be made at the unit price for each type and size of pipe.
c. Includes: Unit price includes, but is not limited to, furnishing and installing pipe; trenchless installation materials and equipment; pit excavation, dewatering, and placing backfill material; tracer system; testing; and disinfection.

B. Water Main with Casing Pipe:

1. Trenched:

a. Measurement: Each type and size of pipe properly installed with a casing pipe in an open trench, will be measured in linear feet along the centerline of the casing pipe from end of casing to end of casing. Additional pipe and casing installed beyond the length specified in the contract documents will not be measured unless the Engineer provides prior authorization.
b. Payment: Payment will be made at the unit price for each type and size of carrier pipe.
c. Includes: Unit price includes, but is not limited to, furnishing and installing both carrier pipe and casing pipe, trench excavation, dewatering, furnishing bedding material, placing bedding and backfill material, casing spacers, furnishing and installing annular space fill material, tracer system, testing, and disinfection.

2. Trenchless:

a. Measurement: Each type and size of pipe properly installed by trenchless methods with a casing pipe will be measured in linear feet along the centerline of the casing pipe. Additional pipe and casing installed beyond the length specified in the contract documents will not be measured unless the Engineer provides prior authorization:
b. Payment: Payment will be made at the unit price for each type and size of carrier pipe.
c. Includes: Unit price includes, but is not limited to, furnishing and installing both carrier pipe and casing pipe; trenchless installation materials and equipment; pit excavation, dewatering, and placing backfill material; casing spacers; furnishing and installing annular space fill material; tracer system; testing; and disinfection.

C. Fittings: One of the following methods will be specified for measurement and payment of water main fittings.

1. Count fittings by type and size.

2. One of the following methods for payment will be specified:

a. Payment will be made at the unit price for each type and size of fitting properly installed.

b. Payment will be made based on a conversion to a weight basis according to the standard fitting weights as published in AWWA C153 for ductile-iron compact fittings.

3. Restrained joints and thrust blocks are incidental to fittings.

1. Fittings by Count:

a. Measurement: Each type and size of fitting installed as specified in the contract documents or as required for proper installation of the water main will be counted. Fittings not specified in the contract documents, installed at the contractor's option, will not be counted.
b. Payment: Payment will be made at the unit price for each type and size of fitting properly installed
c. Includes: Unit price includes, but is not limited to, restrained joints and thrust blocks.

2. Fittings by Weight:

a. Measurement: Each type and size of fitting installed as specified in the contract documents or as required for proper installation of the water main will be counted. Fittings not specified in the contract documents, installed at the contractor's option, will not be counted. Determine the total weight of fittings counted, in pounds, based upon the standard fitting weights published in AWWA C153 for ductile iron compact fittings.
b. Payment: Payment will be made for fittings at the unit price per pound.
c. Includes: Unit price includes, but is not limited to restrained joints and thrust blocks.

B.D. Water Service Stubs:

1. Count eachMeasurement: Each type and size of water service stub and stop box, installed as a single item, from the water main to the stop box will be counted.

2. For each installation, payment Payment: Payment will be made at the unit price.

3. Corporation Includes: Unit price includes, but is not limited to, corporation, service pipe, stop, and stop box are incidental to this item.

PART 2 - PRODUCTS

2.01 WATER MAIN

A. Polyvinyl Chloride (PVC) Pipe:

1. Conform to Comply with AWWA C900 or C905 with gray iron pipe equivalent outside diameters.

2. Minimum Wall Thicknesses:

a. 4-inch through 24-inch sizes: DR 18.
b. Sizes over 24-inch: See the plans As specified in the contract documents.

3. Joint Type: Use push-on joint type, except as otherwise required in the contract documents or as authorized by the Engineer.

a. Push-on: Per AWWA C900 or AWWA C905.
b. Integral Restrained Joint: AWWA C900 or AWWA C905 pipe with restraining system manufactured integrally into pipe end.
c. Mechanical Restrained Joint: Ductile iron mechanical device designed for joint restraint of AWWA C900 or AWWA C905 pipe complying with the requirements of ASTM F 1674.

3.4. Markings on Pipe:

a. Name of manufacturer.
b. Size and class.
c. Spigot insertion depth gauge.
d. National Sanitation Foundation (NSF) seal.

B. Ductile Iron Pipe:

1. Minimum Thickness Class:

a. 4-inch through 24-inch sizes: Special thickness Class 52 per AWWA C151.
b. Sizes over 24 inches: As shown on the plans specified in the contract documents.

2. Cement-mortar lined, per AWWA C104 with asphaltic seal coat.

3. External Coating: Asphaltic per AWWA C151.

4. Joint Type: Use push-on type, except as otherwise required on the plans in the contract documents or specifically as authorized by the Jurisdictional Engineer.

a. Push-on: per AWWA C111.
b. Mechanical: per AWWA C111.
c. Restrained, Buried: Pipe manufacturer's standard field removable system.
d. Restrained, in Structures: Restraining gland, flanged or grooved.
e. Flanged: AWWA C111.
f. Grooved: AWWA C606.
g. Gaskets:  Per AWWA C111.

5. Markings on Pipe:

a. Name of manufacturer.
b. Size and class.
c. Spigot insertion depth gauge.

C. Prestressed Concrete Cylinder Pipe:

1. Design and manufacture according to AWWA C301 and C304 to meet the following minimum conditions.

a. Internal Pressure: 150 psi.
b. Earth Loads: Actual trench depth, but not less than 6 feet.
c. Live Loads: HS 20 vehicle over trench.
d. Surge Pressure: Allowance 60 psi.
e. Bedding: Type R2, AWWA C304, Figure 9.
f. Safety Factor: 2.5.

2. Joints:

a. Steel joint rings with rubber gaskets per AWWA C301.
b. External Joint Filler: Cement mortar with diapers.
c. Outlets: Flanged, per ANSI B16.1, Class 125, with 1/8 inch minimum thickness rubber gaskets.

2.02 BOLTS FOR WATER MAIN AND FITTINGS

Use corrosion resistant bolts.

A. Tee-bolts and Hexagonal Nuts for Mechanical Joints:

1. High-strength, low-alloy steel manufactured according to AWWA C111.

2. Provide ceramic-filled, baked-on, fluorocarbon resin coating for bolts and nuts.

3. Include factory-applied lubricant that produces low coefficient of friction for ease of installation.

B. Other Bolts and Nuts:

1. Stainless steel.

2. Ductile iron.

3. Zinc, zinc chromate, or cadmium plated.

2.03 FITTINGS

A. For Ductile Iron and PVC Pipe:

1. AWWA C110 or AWWA C153.

2. Joint Type:

a. Use mechanical joint conforming to AWWA C111 for pipe sizes 16 inches and less. For pipe sizes 16 inches and less, use mechanical joints complying with AWWA C111.
b. For pipe sizes greater than 16 inches, use restrained mechanical joint system. Provide follower gland using breakaway torque bolts to engage thrust restraint.

1) Minimum pressure rating of 250 psi same as connecting pipe. For fittings between dissimilar pipes, the minimum pressure rating is the lesser of the two pipes.
2) Suitable for buried service.
3) Provide stainless steel ste screws on follower gland.
4)3) Joint restraint system to be field installable, field removable, and re-installable.

c. Use of alternate restraint systems must be approved by the Jurisdictional Engineer.

3. Cement-mortar lined per AWWA C104 with asphaltic coating.

4. Wall Thickness: AWWA C153.

5. Gaskets: Per AWWA C111.

B. Fittings for Prestressed Concrete Cylinder Pipe: As required for prestressed concrete cylinder pipe.

C. Flange Adapter:

1. Body: Ductile iron conforming to the requirements of complying with ASTM A 536.

2. End Rings (Follower Rings):  Ductile iron conforming to the requirements of complying with ASTM A 536

3.Gaskets: New rubber compounded for water service and resistant to permanent set.

4. Bolts and Nuts:  High strength, low alloy corrosion resistant steel or carbon steel bolts conforming to the requirements of complying with ASTM A 307

D. Pipe Coupling:

1. Center Sleeve (Center Ring):  Steel pipe or tubing conforming to the requirements of complying with ASTM A 53 or ASTM A 512; or formed carbon steel with a minimum yield of 30,000 psi.

2. End Ring (Follower Ring): Ductile iron conforming to the requirements of complying with ASTM A 536, or steel meeting or exceeding the requirements of ASTM A 576, grade 1010-1020.

3. Gaskets: New rubber compounded for water service and resistant to permanent set.

4. Bolts and Nuts:  High strength, low alloy corrosion resistant steel.

2.04 CONCRETE THRUST BLOCKS

A. Use concrete with a compressive strength of 4000 psi at 28 days.

B. Refer to the plans Comply with the contract documents for dimensions and installation of thrust blocks. See Comply with Figure 5010.1.

C. Use for all pipe sizes 16 inches in diameter or smaller or when specified.

2.05 PIPELINE ACCESSORIES

A. Polyethylene Wrap:

1. Use on all ductile iron pipe and fittings in buried service.

2. Conform to Comply with AWWA C105.

3. 8 mil minimum thickness.

B. Tracer System: See Comply with Figure 5010.3

1. Tracer Wire: #12 solid single copper conductor.

a. Insulation Material:  Linear low-density polyethylene (LLDPE) installation suitable for direct burial applications.
b. Insulation Thickness:  0.045 inches, minimum.

2. Ground Rod:  3/8 inch dia. diameter, 60-inch long steel rod uniformly coated with metallically bonded electrolytic copper.

3. Ground-rod Clamp:  High-strength, corrosion-resistant copper alloy.

4. Splice Kit: Inline resin splice kit with split bolt for 1kV and 5kV.  Insulates and seals single conductor and unshielded cable splices for direct bury and submersible applications.

5. Tracer Wire Station (Figure 5010.5): See Contact the Jurisdiction for requirements.

2.06 SPECIAL GASKETS

A. For soils contaminated with gasoline, use neoprene or nitrile gaskets.

B. For soils contaminated with volatile organic compounds, use nitrile or fluoro carbon gaskets.

C. For other soil contaminants, see contact the Jurisdictional Engineer for the requirements.

2.07 WATER SERVICE PIPE AND APPURTENANCES

A. Controlling Standards: Local plumbing and fire codes.

B. Materials (as allowed by Jurisdiction or specified in contract documents):

1. Copper Pipe:

a. Conform to Comply with ASTM B 88.
b. Wall thickness: Type K.

2. Ductile Iron Pipe: As specified in Section 5010, 2.01. Polyethylene wrap is required.

3. PVC Pipe: ASTM D 1785, SDR 21, Schedule 80, Type S joints.

4. Brass Pipe: Red, seamless, per ASTM B 43.

5. Polyethylene Pipe: Class 200, per AWWA C901.

C. Corporations and Stop Boxes: See Contact the Jurisdiction for requirements.

208 NON-SHRINK GROUT

Comply with Iowa DOT I.M. 491.13.

209 CASING PIPE

Comply with Section 3020.

PART 3 - EXECUTION

3.01 GENERAL PIPE INSTALLATION

A. Install only approved materials.

B. Protect pipe joints and valves from damage while handling and storing.

C. Do not use deformed, defective, gouged, or otherwise damaged pipes or fittings.

D. Excavate trench and place backfill according to Section 3010. If trenchless methods are utilized, install according to Section 3020. Keep trench free of water.

E. Clean pipe interior prior to placement in the trench.

F. Provide uniform bearing along the full length of the pipe barrel. Provide bell holes.

G. Install pipe with fittings and valves to the lines and grades shown on the plans.

H. Clean joint surfaces thoroughly and apply lubricant approved for use with potable water.

I. Push pipe joint to indication line on spigot end of pipe before making any joint deflections.

J. Limit joint deflections to one degree less than pipe manufacturer's recommended maximum limit.

K. Tighten bolts in a joint evenly around the pipe.

L. Install concrete thrust blocks on pipes 16 inches in diameter or smaller (see Figure 5010.1). For pipes larger than 16 inches, install restrained joints.

M. Install remaining pipe bedding according to the plans using materials conforming to these specifications.

N. Keep exposed pipe ends closed with rodent-proof end gates at all times when pipe installation is not occurring.

O. Close the ends of the installed pipe with water-tight plugs during nights and non-working days.

P. Do not allow any water from the new pipeline to enter the existing distribution system piping.

3.01 PIPE INSTALLATION

A. General:

1. Do not use deformed, defective, gouged, or otherwise damaged pipes or fittings.

2. Keep trench free of water. Clean pipe interior prior to placement in the trench.

3. Install pipe with fittings and valves to the lines and grades specified in the contract documents.

4. Clean joint surfaces thoroughly and apply lubricant approved for use with potable water and recommended by the manufacturer.

5. Push pipe joint to indication line on spigot end of pipe before making any joint defelctions.

6. Limit joint deflections to one degree less than pipe manufacturer's recommended maximum limit.

7. Tighten bolts in a joint evenly around the pipe.

8. Install concrete thrust blocks on pipes 16 inches in diameter or smaller (comply with Figure 5010.1). For pipes larger than 16 inches, install restrained joints; when specified in the contract documents, also install concrete thrust blocks.

9. Keep exposed pipe ends closed with rodent-proof end gates at all times when pipe installation is not occurring.

10. Close the ends of the installed pipe with watertight plugs during nights and non-working days.

11. Donot allow any water from the new pipeline to enter the existing distrubution system piping until testing and disinfection are successfully completed.

B. Trenched:

1. Excavate trench and place pipe bedding and backfill material as specified in Section 3010.

2. Provide uniform bearing along the full length of the pipe barrel. Provide bell holes.

C. Trenchless: Comply with Section 3020.

3.02 ADDITIONAL REQUIREMENTS FOR DUCTILE IRON PIPE INSTALLATION

A. Install according to AWWA C600 Utilize full-length gauged pipe for field cuts. Alternatively, field-gauge pipe selected for cutting to verify the outside diameter is within allowable tolerances.

B. Cut pipe perpendicular to pipe barrel.  Do not damage cement lining.  Bevel cut ends for push-on joints according to AWWA C600 the manufacturer's recommendations.

C. Encase all pipe, valves, and fittings with polyethylene wrap. See the plans Comply with Figure 5010.2.

3.03 ADDITIONAL REQUIREMENTS FOR PVC PIPE INSTALLATION

A. Cut pipe perpendicular to pipe barrel. Deburr and bevel cut spigot end of pipe barrel to match factory bevel. Re-mark insertion line.

B. Bevel cut end of pipe barrel per pipe manufacturer's recommendation. When connecting to shallow-depth bells, such as on some cast iron fittings or valves, cut spigot end square to remove factory bevel. Deburr end and form partial bevel on end.

C. See AWWA C605.

3.04 ADDITIONAL REQUIREMENTS FOR PRESTRESSED CONCRETE CYLINDER PIPE INSTALLATION

A. Install according to AWWA M9.

B. Relieve gasket tension by inserting a small rod between the gasket and the gasket groove, and running the tool around the pipe twice.

C. Check gasket position using a metal feeler gauge after the joint has been assembled.

D. Complete joint exterior grouting after pipe has been properly positioned using non-shrink grout.

3.05 POLYETHYLENE ENCASEMENT INSTALLATION

A. Apply to all buried ductile iron pipe, fittings, fire hydrants, and appurtenances.

B. Install according to AWWA C105. Wrap material snugly around pipe, but provide sufficient slack to prevent stretching around irregular areas such as fittings and valves. Also see Comply with Figure 5010.2

D.C. Secure and repair encasement material using polyethylene tape, or replace as necessary.

C.D. The polyethylene encasement is to prevent contact between the pipe and the bedding material, but need not be airtight or watertight.

3.06 TRACER SYSTEM INSTALLATION

A. Install with all buried water main piping. See Comply with Figure 5010.3 for tracer wire installation.

B. Begin and terminate system at all connections to existing mains.

C. Install wire continuously along the lower quadrant of the pipe. Do not install wire along the bottom of the pipe. Attach wire to the pipe at the midpoint of each pipe length; use 2-inch wide, 10 mil thickness polyethylene pressure sensitive tape.

D. Install splices only as authorized by the Jurisdictional Engineer. Allow the Jurisdictional Engineer to inspect all below-grade splices of tracer wire prior to backfill.

E. Install ground rods adjacent to connections to existing piping and at locations shown on plans specified in the contract documents or as directed by the Jurisdictional Engineer.

F. Bring two wires to the surface at each hydrant location and terminate with a tracer wire station (see comply with Figure 5010.3).

G. Final inspection of the tracer system will be conducted at the completion of the project and prior to acceptance by the owner. Verify the electrical continuity of the system. Repair any discontinuities.

3.07 CONFLICTS

A. Provide temporary support for existing gas, telephone, power, or other utilities or services that cross the trench.

B. Compact backfill under existing utility crossing as specified in Section 3010 or construct utility line supports where indicated on plans or as directed by the Jurisdictional Engineer.

C. Separate water mains from gravity sewers by horizontal distance of at least 10 feet unless:

1. Bottom of water the main is at least 18 inches above the top of the sewer.

2. Sewer is placed in a separate trench or in the same trench on a bench of undisturbed earth at a minimum horizontal separation of 3 feet separation from the water main.

D. Use water main materials as specified in Section 4010, 2.01 G for gravity sewers with less than 10 feet horizontal distance and the bottom of the water main less than 18 inches above top of the sewer; maintain at least 2 feet linear separation.

E. Where the water main crosses under the gravity sewer, or where the bottom of the water main is less than 18 inches above the top of the sewer:

1. If physical conditions prohibit the separation, the water main may not be placed closer than 6 inches above a sewer or 18 inches below a sewer. Use the maximum feasible separation distance in all cases.

2. Use full length of water main material as specified in Section 4010, 2.01 for gravity sewer centered on the water main.

3. The water main and sewer must be adequately supported and have watertight joints (See Comply with Figures 3010.4 through 3010.6).

4. Place backfill in the trench with low permeability soil for 10 feet centered on the crossing.

F. Separate water mains from sanitary sewer force mains by a horizontal distance of at least 10 feet, unless the force main is constructed of water main materials meeting a minimum pressure rating of 200 psi and is installed at least 4 feet horizontally from the water main.

3.08 TRANSITIONS IN PIPING SYSTEMS

Where the specified material of piping system entering or exiting a structure changes, change at the outside of the structure wall, beyond any wall pipe or wall fitting required, unless otherwise shown or specified.

3.09 STRUCTURE PENETRATIONS

A. Wall Pipes:

1. Install where pipes penetrate and terminate at a wall or floor surface of a concrete structure, or where the pipe protrudes through the concrete wall or floor and the protrusion is otherwise unsupported.

2. Provide a waterstop flange near the center of the embedment length.  Waterstop is to be cast  integrally with the wall pipe, or fully welded to it around the pipe circumference.

B. Wall Sleeves:

1. Install where a pipe passes through a structure wall.

2. Sleeves in concrete walls are to be supplied with a waterstop collar, fully welded, and shall be cast in place.

3.10 WATER SERVICE STUB

A. Install water service pipe, corporations, stops, and stop boxes according to local Jurisdiction requirements.

B. Install 1 inch and smaller corporation valves tapped at 45 degrees above horizontal at a minimum distance of 18 nches from pipe bell or other corporation. Install 1 1/2 inch and 2 inch corporation valves tapped horizontal a minimum distance of 24 inches from pipe bell or other corporation.

C. Construct trench and backfill per Section 3010.

3.11 TESTING AND DISINFECTION

Test and disinfect according to Section 5030.

END OF SECTION