J.3 Ward Lake and Cobbett CGs Specifications.pdf

WARD LAKE AND COBBETT CGS WATER LINE REPLACEMENT

Ward Lake and Cobbett CGs Water Line Replacement - Specifications 2021-12-17

CONTENTS

DIVISION 01 – GENERAL REQUIREMENTS

SECTION 01 1000 – MEASUREMENT AND PAYMENT

DIVISION 02 – EXISTING CONDITIONS

SECTION 02 4119 – SELECTIVE DEMOLITION

DIVISION 3 - CONCRETE

SECTION 03 3310 - CONCRETE

DIVISION 22 – PLUMBING

SECTION 22 0500 – BASIC PLUMBING MATERIALS AND METHODS

SECTION 22 1119 – DISINFECTION OF WATER WORKS

DIVISION 31 – EARTHWORK

SECTION 31 2317 – TRENCHING, BEDDING AND BACKFILL FOR UTILITIES

DIVISION 33 - UTILITIES

SECTION 33 1112 - WATER DISTRIBUTION

SECTION 33 1219 - WATER HYDRANTS

Division 01 General Requirements

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MEASUREMENT AND PAYMENT

SECTION 01 1000 - MEASUREMENT AND PAYMENT

PART 1 - GENERAL

1.1. Summary

A. This project consists of installation of approximately 4600 feet of buried water pipe to serve the Ward Lake and Cobbett Campgrounds. Other work items include replacement of two water hydrants and selective demolition.

1.2. Location

A. This project is located at the Ward Lake and Cobbett Campgrounds on the Grand Mesa, Uncompahgre and Gunnison National Forests. The project is approximately 31 miles northeast of Delta, Colorado, near Highway 65 and National Forest System Road (NFSR) 121, Trickle Park Road.

1.3. General Site Conditions and Weather

A. The elevation of the site is approximately 10,300 feet above mean sea level. During the summer, the site experiences warm temperatures. During the winter, the site experiences heavy snowfall and cold temperatures, with snow on the ground typically from November through June or July.

1.4. Use of Premises

A. Limit use of premises to work areas indicated. Do not disturb portions of site beyond areas in which work is indicated.

B. The Ward Lake and Cobbett Campgrounds may be open to campers prior to Contractor mobilization. The Grand Mesa is a popular destination and NFSR 121 will remain open, so the Contractor can expect to encounter Forest visitors during construction.

1.5. Contractor’s Responsibilities

A. Confine storage of materials to areas as approved by the CO.

B. Contractor shall provide adequate signing and barricades and take necessary safety measures to protect the public during all construction operations.

C. Contractor shall minimize disturbance of all undisturbed areas.

D. Preservation of Natural Features: Confines all operations to work limits of the project.

Prevent damage to natural surroundings. Restore damaged areas, repairing or replacing damaged trees and plants, at no additional expense to the Government.

1. Provide temporary barriers to protect existing trees and plants and root zones.

2. Do not remove, injure, or destroy trees or other plants without prior approval.

Consult with CO prior to any removal, and then remove agreed-on roots and branches that interfere with construction.

3. Do not fasten ropes, cables, or guys to existing trees.

4. Carefully supervise excavating, grading, filling, and other construction operations near trees to prevent damage.

E. Merchantable Timber

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1. The Forest Service shall identify merchantable timber, after the contractor has staked out the proposed water line location.

2. Merchantable timber that is felled in the process of demolition or construction shall be decked as directed by the CO.

F. Existing Utilities: Notify CO and utility companies of proposed locations and times for excavation.

1. Contractor shall be responsible for locating and preventing damage to utilities.

If damage occurs, repair utility at no additional expense to the Government.

2. Interruption of Existing Utility Service: Notify CO, 48 hours in advance of any interruption of existing utilities.

1.6. Work Restrictions

A. Smoking is not permitted in buildings, bathrooms or within 25 feet (8 meters) of entrances, operable windows, or outdoor air intakes.

B. Fires are not permitted.

1.7. Field Verification

A. Field verify all new and existing dimensions affecting the work of this contract before ordering products.

1.8. Cleaning of Equipment to Prevent Spread of Weeds and Disease

A. Construction equipment must be washed to remove seeds, plants, plant fragments and soil which may contain such material before it is brought onto National Forest lands.

B. Notify the CO at least 5 days before moving any construction equipment onto National Forest System lands.

C. Construction equipment does not include cars, pickup trucks, and other vehicles that regularly travel between the construction site and areas outside of National Forest System lands.

D. Wash the sides, tops, and undercarriages of all construction equipment. Remove all seeds, plants, plant fragments, dirt, and debris from the construction equipment.

E. The Forest Service shall inspect all construction equipment before construction equipment is moved on to the Forest. If construction equipment is not clean, the Contractor shall clean the construction equipment, and the equipment shall be inspected again.

1.9. Camping

A. With approval by the Grand Valley Ranger District, National Forest System lands may be used by the Contractor to have one fully contained recreation vehicle which may remain at this site during the period of performance. A second recreational vehicle may be approved, with approval from the Grand Valley Ranger District.

1.10. Disposal Site

A. The contractor shall dispose of materials left from the construction and any demolition operations off the National Forest System at an approved sanitary landfill.

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PART 2 - DEFINITIONS OF ITEMS AND PAYMENT

2.1. DESCRIPTION

A. This section explains what is and what is not included in each pay item; the limits or cutoff points where one item ends, and another begins; and basis of payment for work items listed in the Schedule of Items.

B. Payment: For each individual item listed here and in the Schedule of Items, payment shall be full compensation for all work related to the particular item in accordance with these specifications, and as shown on the drawings

2.2. SCHEDULE OF ITEMS

A. Schedule of Items: The project Schedule of Items includes several sections to organize the work into Base Items.

1. Contractor shall provide pricing for all items listed in the Schedule of Items.

2. Contract award will be made for all Base Items.

B. Base Items (BI):

1. Base Item No. 1 - General Requirements, Mobilization, Demobilization, Bonding and Insurance

a. Method of Measure: Design Quantity

b. Payment: Lump sum

c. Description: The contract lump sum price shown in the Schedule of

Items shall include all materials, equipment, labor and incidentals required to perform all operations necessary for the movement of personnel, equipment, supplies and incidentals to the project site, and for all other work and operations that must be performed or that cause cost to be incurred prior to beginning of work.

1) Progress payments shall be made as follows:

a) When 5 percent or more of the original contract amount is earned from other Base Items (except Base Item No. 1), 50 percent of the amount of Base Item No.

1, or 2.5 percent of the original contract amount will be paid, whichever is less.

b) When 10 percent or more of the original contract amount is earned from other Base Items (except Base Item No. 1), 100 percent of the amount of Base Item No. 1, or 5 percent of the original contract amount will be paid, whichever is less.

c) Upon completion of all work on the project any unpaid amount for Base Item No. 1 will be paid.

d) The total of all payments for Base Item No. 1, including bonding, shall not exceed the original contract amount for this Base Item.

2. Base Item No. 2 - Waterline Installation

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a. Method of Measure: Design Quantity

b. Payment: Unit price per linear foot of water pipe installed in the ground

c. Description: Includes installation of approximately 4600 feet of underground waterline. Includes all staking and construction work associated with the waterline installation, including furnishing and installing all backfill materials, furnishing and installing all pipe, fittings, valves, valve boxes and appurtenances. Includes all earthwork, excavation, backfill material, backfilling and compaction, daylighted drains, road repairs and traffic control. Includes flushing, testing, and disinfection of installed lines. Includes all work and materials required for clearing and grubbing.

3. Base Item No. 3 - Selective Demolition

a. Method of Measure: Design Quantity

b. Payment: Lump Sum

c. Description: Includes all work associated with removing two existing hydrants, five valves, and five valve boxes. Existing underground water lines shall be removed. If the path of the new water line deviates from existing water line, then the existing water line shall be abandoned in place.

4. Base Item No. 4 - Hydrant Installation

a. Method of Measure: Actual Quantity

b. Payment: Unit price per hydrant

c. Description: Includes all work associated with replacing a campground water hydrant with a new hydrant, post, hydrant pad and curb box system, and connection to the water distribution system.

PART 3 - EXECUTION (NOT USED)

END OF SECTION 01 1000

Division 02 Existing Conditions

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SELECTIVE DEMOLITION

SECTION 02 4119 – SELECTIVE DEMOLITION

PART 1 – GENERAL

1.1. SUMMARY

A. This Section includes the following:

1. Removing selected above-grade construction.

2. Removing selected below-grade construction.

3. Disconnecting, capping or sealing, and abandoning in-place selected site utilities.

B. ITEMS TO BE DEMOLISHED

1. Two hydrants in Cobbett Campground.

2. Five valves and five valve boxes.

3. Existing water distribution pipe.

C. BELOW GRADE CONSTRUCTION TO BE ABANDONED IN PLACE

1. If the path of the new water line deviates from existing water line, then the existing water line shall be abandoned in place.

1.2. DEFINITIONS

A. Demolish: Completely remove and legally dispose of off the National Forest System.

B. Abandon: Remove items that are visible above ground. Below ground utilities identified to be abandoned in place, shall be removed to at least 1 foot below grade, drained, and capped or sealed. Utilities that interfere with construction shall be removed to the limit required for new construction.

1.3. MATERIALS OWNERSHIP

A. Unless otherwise indicated, selective demolition items and waste becomes property of

Contractor.

PART 2 – PRODUCTS

2.1. REPAIR MATERIALS

A. Use repair materials identical to existing materials.

1. If identical materials are unavailable or cannot be used for exposed surfaces, use materials that visually match existing adjacent surfaces to the fullest extent possible.

2. Use materials whose installed performance equals or surpasses that of existing materials.

PART 3 – EXECUTION

3.1. EXAMINATION

A. Inventory and record the condition of items to be demolished and removed.

B. Inventory and record the condition of items that are not identified for demolition that are adjacent to selective demolition items.

3.2. PREPARATION

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A. Existing Utilities: Locate and identify all utilities before beginning excavation work.

3.3. GENERAL SELECTIVE DEMOLITION

A. General: Demolish and remove existing construction only to the extent required by new construction and as indicated. Use methods required to complete the Work within limitations of governing regulations.

1. Neatly cut openings and holes plumb, square, and true to dimensions required.

Use cutting methods least likely to damage construction to remain or adjoining construction.

2. Cut or drill from the exposed or finished side into concealed surfaces to avoid marring existing finished surfaces.

3. Do not use cutting torches until work area is cleared of flammable materials. At concealed spaces, such as duct and pipe interiors, verify condition and contents of hidden space before starting flame-cutting operations. Maintain portable fire-suppression devices during flame-cutting operations.

4. Dispose of demolished items and materials promptly. Do not let demolished items and waste materials accumulate on site.

B. Existing Items to Remain: Protect construction indicated to remain against damage and soiling during selective demolition. When permitted by CO, items may be removed to a suitable, protected storage location during selective demolition, and cleaned and reinstalled in their original locations after selective demolition operations are complete.

If damage occurs to items not identified for selective demolition, the Contractor shall repair the damage at no additional expense to the Government.

3.4. PLUMBING DEMOLITION

A. Disconnect, demolish, and remove plumbing systems, equipment, and components indicated to be removed.

1. Piping to Be Removed: Remove portion of piping indicated to be removed and cap or plug remaining piping with same or compatible piping material.

2. Piping to Be Abandoned in Place: Drain piping and cap or plug piping with same or compatible piping material. Remove construction to be abandoned in place to at least 1 foot below grade.

3. Equipment to Be Removed: Disconnect and cap services and remove equipment.

B. If pipe or equipment indicated to remain is damaged in appearance or is unserviceable, remove damaged or unserviceable portions and replace with new products of equal capacity and quality.

3.5. SITE RESTORATION

A. Below-Grade Areas: Completely fill and compact below-grade areas and voids resulting from demolition operations with satisfactory soils according to requirements in Section 31 2510 Trenching, Bedding and Backfill for Utilities.

B. Clean area of debris caused by demolition operations.

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END OF SECTION 02 4119

Division 03 Concrete

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CONCRETE

SECTION 03 3310 - CONCRETE

PART 1 – GENERAL

1.1. DESCRIPTION

A. The work of this section consists of constructing small concrete structures, such as hydrant pads, sidewalks, thrust blocks, pipe supports, utility pad, and concrete items requiring 1/3 cubic yard or less in accordance with the detail shown on the drawings and in conformance with the requirements of this specification.

PART 2 – PRODUCTS

2.1. PORTLAND CEMENT

A. ASTM C150, Type I or Type IA

2.2. DRY MIX

A. The prebagged concrete mix shall be made using a dry, preportioned, blended mix meeting the requirements of ASTM C387 for 28-day, 3500 psi concrete.

2.3. WATER

A. Water shall be clean and free from alkali and other deleterious materials. Water shall be added to each bag as recommended by the manufacturer.

2.4. PRECAST CONCRETE FORMWORK

A. Forms shall be constructed of plywood, lumber, or steel sheets or plates free of defects, which could cause blemishes. Forms must be removable without injuring the concrete and must be constructed to maintain tolerances between mating surfaces of buildings components.

B. Form liners shall be used to provide the desired exterior appearance.

1. Form liners for all exterior surfaces shall be approved by the Contracting Officer prior to use.

C. Form coating shall be non-staining type that will not leave residual matter on surface of concrete or adversely affect proper bonding of subsequent coatings, caulking, grout, or adhesive applied to concrete surfaces.

1. Use form release agent or coating as recommended by manufacturer of the form liner.

2. Coatings containing mineral oils or other nondrying ingredients are not permitted.

2.5. CONCRETE REINFORCEMENT

A. Reinforcing steel shall meet the requirements of ASTM A615, grade 60.

B. Welded wire fabric shall meet the requirements of ASTM A185.

C. Pre-stress strand, if Contactor elects to use it to facilitate manufacturing, shall meet the requirements of ASTM A416, Grade 270.

D. All reinforcement shall be new, free from dirt, oil, paint, grease, loose mill scale, and loose or thick rust when placed.

2.6. CONCRETE MIX REQUIREMENTS

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A. Concrete shall be supplied by a ready-mix or precast concrete products firm regularly engaged in the business.

B. Cement, aggregate, and water shall be proportioned to obtain concrete with good workability.

C. Do not use materials containing frost or lumps of frozen materials.

2.7. CAULKING, SEALANT, GROUT, ADHESIVE AND MORTAR

A. Caulking and sealant shall remain flexible and non-sag at temperatures from - 50° to + 140° Fahrenheit.

1. Exterior joints at roof ridge, roof/wall connection, and wall panel joints: 100% silicone caulk, clear or colored to match concrete, GE Silicone II, 800-626-2000, or approved equal.

2. Interior joints: Paintable Latex Caulk, GE Speedpaint 35-Year Siliconized Acrylic Latex caulk, 800-626-2000, or approved equal.

B. Grout shall be non-shrink type and shall match color of surrounding concrete as nearly as possible.

C. Epoxy concrete adhesive shall be two component, rigid, non-sag gel adhesive for bonding to dry or damp surfaces, moisture insensitive. Color to match surrounding concrete as nearly as possible.

D. Portland cement mortar shall consist of one part Portland cement, three parts sand, and enough water to make a workable mixture. Bonding agent may be added to mixture in lieu of separate application of adhesive to panel.

PART 3 – EXECUTION

3.1. SITE PREPARATION

A. Responsibility of the contractor:

1. Provide exact location by stakes or other approved method.

2. Provide clear and level site free of overhead and/or underground obstructions.

3.2. CONCRETE FORMWORK

A. Support and brace forms sufficiently to prevent distortion of forms due to pressure of the concrete during concrete placement, vibrating of concrete, and curing.

B. Form ties will not be allowed.

C. Remove all snow, ice, dirt, sawdust, shavings, or other debris within the forms before placing concrete.

3.3. REMOVAL OF FORMS

A. Contractor shall assume all responsibility for determining when to remove the concrete components from the forms without causing structural damage to the components.

Concrete structures constructed with damaged components will be rejected.

3.4. REUSE AND COATING OF FORMS AND FORM LINERS

A. Thoroughly clean forms and form liners before each use.

B. Apply form coating and form release agent on all forms and form liners in accordance with the manufacturer’s recommendations.

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3.5. CONCRETE REINFORCEMENT

A. Detail reinforcement in accordance with ACI 318.

B. Steel reinforcement shall be centered in the cross-section area of the concrete structures.

C. Accurately place and adequately support steel reinforcing or strand in final position prior to starting placement of concrete. The maximum allowable variation for center-to-center spacing of reinforcing steel is ½ inch.

D. Use full lengths of reinforcing steel whenever possible and keep the number of splices to a minimum. When splices are necessary on long runs, splices shall be alternated from opposite sides of the component for adjacent steel bars. Lap bars No. 4 or smaller, a minimum of 12 inches. Lap bars larger than No. 4, a minimum of 24 bar diameters.

E. Bend bars cold unless otherwise approved by the Contracting Officer. No bars partially embedded in concrete shall be field bent except as approved by the Contracting Officer.

3.6. COLD WEATHER CONCRETE

A. Cold weather concrete placement shall be in accordance with ACI 306.

B. Do not place concrete if ambient temperature is expected to be below 35°F during the curing period unless heating is provided to maintain the concrete surface temperature of at least 50°F for a period of 5 days after the concrete has been placed.

3.7. HOT WEATHER CONCRETE

A. The temperature of the concrete shall not exceed 80°F at time of placement, and when the ambient temperature reaches 90°F, the concrete shall be protected with moist covering or other methods approved by the Contracting Officer.

3.8. MIXING AND DELIVERY OF READY-MIX CONCRETE

A. Mixing and delivery shall be accomplished in accordance with ASTM C94, sections 9, 10, and 11 as appropriate for manufacturer.

B. Aggregate and water will be adjusted to compensate for differences in the saturated surface-dry condition.

C. Dry concrete mix and water shall be thoroughly mixed as recommended by the manufacturer. Mixing must be done in either a mechanical mixer or a wheelbarrow.

Concrete shall be mixed and placed while fresh. Any concrete in which initial set had begun shall be wasted. In any case, the elapsed time from placement of the first batch to placement of the last batch necessary to complete a specific concrete item shall not exceed 1 hour.

3.9. PLACING AND CONSOLIDATING CONCRETE

A. Fresh concrete shall be placed in the forms and rodded as necessary to remove the air pockets. The exposed surfaces of the concrete items shall receive a medium trowel finish.

B. Concrete used for waterline thrust blocks shall be placed against the excavation in the direction of intended trust resistance. Exposed surfaces shall only require a tamped finish.

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C. The Contracting Officer must be given the opportunity to inspect forms after placement of reinforcing steel in forms and before placement of concrete, when requested.

D. Concrete shall be discharged as soon as possible after mixing and time shall not exceed 30 minutes.

E. Avoid segregation. Place in layers not more than 24 inches deep. Do not move concrete with vibrators or tampers.

F. Consolidate concrete with suitable mechanical vibrators operating within the concrete or attached to steel forms. Vibrate at any point sufficiently to accomplish compaction, but do not prolong to a point where segregation occurs.

G. Sidewalk shall be one-piece to prevent separation of panels as a result of freeze/thaw.

3.10. FINISHING CONCRETE

A. Hydrant pad: Strike flush to within 1/8-inch variation in 6 feet. Float and trowel slabs smooth until no marks remain. Apply a final light broom finish to slabs.

3.11. CURING AND HARDENING CONCRETE

A. Keep all concrete surfaces wet for at least six days after being placed. Acceptable methods include ponding, wet burlap, curing paper, plastic sheets, and membrane curing compound. Other methods are subject to the approval of the Contracting Officer.

B. If determined by the CO, exposed surfaces shall be covered with plastic sheeting after the concrete has taken its initial set.

END OF SECTION 3 3310

Division 22 Plumbing

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BASIC PLUMBING MATERIALS AND METHODS

Section 22 0500 – BASIC PLUMBING MATERIALS AND METHODS

PART 1 – GENERAL

1.1. SUMMARY

A. This Section includes the following basic mechanical materials and methods to complement other Division 22 Sections.

1. Piping materials and installation instructions common to most piping systems.

2. Installation requirements common to equipment specification sections.

1.2. QUALITY ASSURANCE

A. Plumbing systems shall be installed in accordance with local codes and regulations, the latest edition of the International Plumbing Code (2018), and the requirements of this specification. In the case of conflict, the more stringent requirements shall prevail. State license contractors are required.

B. Comply with ASME A13.1 for lettering size, length of color field, colors, and viewing angles of pipe identification devices.

C. NSF Compliance:

1. Comply with NSF 14 for plastic potable-water-service piping.

2. Comply with NSF 61 for materials for water-service piping and specialties for domestic water.

1.3. DELIVERY, STORAGE, AND HANDLING

A. Deliver pipes and tubes with factory-applied end caps. Maintain end caps through shipping, storage, and handling to prevent pipe end damage and prevent entrance of dirt, debris, and moisture.

B. Protect stored pipes and tubes from moisture and dirt. Elevate above grade. Do not exceed structural capacity of floor, if stored inside.

C. Protect flanges, fittings, and piping specialties from moisture and dirt.

D. Store plastic pipes protected from direct sunlight. Support to prevent sagging and bending.

PART 2 – PRODUCTS

2.1. GENERAL

A. All products that will be in contact with the drinking water must be NSF / ANSI 61 certified as applicable.

2.2. PIPE, TUBE, AND FITTINGS

A. Refer to individual Division 22 piping Sections for pipe, tube, and fitting materials and joining methods.

B. Pipe Threads: ASME B1.20.1 for factory-threaded pipe and pipe fittings.

2.3. JOINING MATERIALS

A. Refer to individual Division 22 piping Sections for special joining materials not listed below.

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B. Pipe-Flange Gasket Materials: ASME B16.21, nonmetallic, flat, asbestos-free, 1/8-inch (3.2-mm) maximum thickness unless thickness or specific material is indicated.

C. Plastic, Pipe-Flange Gasket, Bolts, and Nuts: Type and material recommended by piping system manufacturer, unless otherwise indicated.

D. Solder Filler Metals: ASTM B 32, lead-free alloys. Include water-flushable flux according to ASTM B 813.

E. Brazing Filler Metals: AWS A5.8, BCuP Series or BAg1, unless otherwise indicated.

F. Welding Filler Metals: Comply with AWS D10.12.

G. Solvent Cements for Joining Plastic Piping:

1. ABS Piping: ASTM D 2235.

2. CPVC Piping: ASTM F 493.

3. PVC Piping: ASTM D 2564. Include primer according to ASTM F 656.

4. PVC to ABS Piping Transition: ASTM D 3138.

PART 3 – EXECUTION

3.1. PIPING SYSTEMS - COMMON REQUIREMENTS

A. Install piping according to the following requirements and Division 22 Sections specifying piping systems.

B. Drawing plans, schematics, and diagrams indicate general location and arrangement of piping systems. Indicated locations and arrangements were used to size pipe and calculate friction loss, expansion, pump sizing, and other design considerations. Install piping as indicated unless deviations to layout are approved by CO.

C. Install piping to permit valve servicing.

D. Install piping to drain.

E. Install piping free of sags and bends.

F. Install fittings for changes in direction and branch connections.

G. Select system components with pressure rating equal to or greater than system operating pressure.

H. Verify final equipment locations for roughing-in.

3.2. PIPING JOINT CONSTRUCTION

A. Join pipe and fittings according to the following requirements and Division 22 Sections specifying piping systems.

B. Ream ends of pipes and tubes and remove burrs. Bevel plain ends of steel pipe.

C. Remove scale, slag, dirt, and debris from inside and outside of pipe and fittings before assembly.

D. Threaded Joints: Thread pipe with tapered pipe threads according to ASME B1.20.1.

Cut threads full and clean using sharp dies. Ream threaded pipe ends to remove burrs and restore full ID. Join pipe fittings and valves as follows:

1. Note internal length of threads in fittings or valve ends, and proximity of internal seat or wall, to determine how far pipe should be threaded into joint.

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2. Apply appropriate tape or thread compound to external pipe threads, unless dry seal threading is specified.

3. Align threads at point of assembly.

4. Tighten joint with wrench. Apply wrench to valve end into which pipe is being threaded.

E. Plastic Piping Solvent-Cement Joints: Clean and dry joining surfaces. Join pipe and fittings according to the following:

1. Comply with ASTM F 402, for safe-handling practice of cleaners, primers, and solvent cements.

2. PVC Pressure Piping: Join schedule number ASTM D 1785, PVC pipe and PVC socket fittings according to ASTM D 2672. Join other-than-schedule-number PVC pipe and socket fittings according to ASTM D 2855.

F. PE Piping Heat-Fusion Joints: Clean and dry joining surfaces by wiping with clean cloth or paper towels. Join according to ASTM D 2657.

1. Plain-End Pipe and Fittings: Use butt fusion.

3.3. PIPING CONNECTIONS

A. Make connections according to the following, unless otherwise indicated:

1. Install unions, in piping NPS 2 (DN 50) and smaller, adjacent to each valve and at final connection to each piece of equipment.

3.4. EQUIPMENT INSTALLATION - COMMON REQUIREMENTS

A. Install equipment to allow maximum possible headroom unless specific mounting heights are not indicated.

B. Install equipment level and plumb, parallel and perpendicular to other building systems and components in exposed interior spaces, unless otherwise indicated.

C. Install plumbing equipment to facilitate service, maintenance, and repair or replacement of components. Connect equipment for ease of disconnecting, with minimum interference to other installations. Extend grease fittings to accessible locations.

D. Install equipment to allow right of way for piping installed at required slope.

3.5. ERECTION OF METAL SUPPORTS AND ANCHORAGES

A. Cut, fit, and place miscellaneous metal supports accurately in location, alignment, and elevation to support and anchor plumbing materials and equipment.

B. Field Welding: Comply with AWS D1.1.

3.6. ERECTION OF WOOD SUPPORTS AND ANCHORAGES

A. Cut, fit, and place wood grounds, nailers, blocking, and anchorages to support, and anchor plumbing materials and equipment.

B. Select fastener sizes that will not penetrate members if opposite side will be exposed to view or will receive finish materials. Tighten connections between members. Install fasteners without splitting wood members.

C. Attach to substrates as required to support applied loads.

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END OF SECTION 22 0500

WARD LAKE AND COBBETT CGS WATER LINE REPLACEMENT 22 1119 - 1

DISINFECTION OF WATER WORKS

Section 22 1119 - DISINFECTION OF WATER WORKS

PART 1 – GENERAL

1.1. SUMMARY

A. Disinfection of newly installed piping, appurtenances, and equipment will be done in accordance with AWWA Standard C651 and C652 as applicable.

B. Disinfection by chlorination shall be performed after flushing and pressure testing are completed and approved by the CO

PART 2 – PRODUCTS

2.1. Materials

A. For disinfection, provide a solution of sodium hypochlorite certified to NSF 60 Drinking Water Standards.

B. For water, provide water from the Grand Mesa Visitor Center well.

C. For dechlorinating, provide Sodium Thiosulfate.

PART 3 – EXECUTION

3.1. Preparation

A. Prepare a Sodium hypochlorite solution of sufficient concentration and quantity so that the concentration in the equipment and in the lines after 24 hours will be at least 10 mg/L.

3.2. Chlorination

A. Use a chemical feed pump or other approved method to create uniform chlorine concentration for the water filling the equipment.

B. All taps, hydrants, and other outlets shall be opened and left open until chlorine is noticeable by odor or testing in the water coming from each, at which time they should immediately be closed, and any discharge captured in a bucket or other storage to prevent discharge to the environment of highly chlorinated water.

C. After the equipment has been filled, leave the water standing for at least 24 hours.

D. Test the chlorine concentration in the water at the end of the treatment process after those 24 hours. If the concentration is not at least 10 mg/L, follow dechlorinating procedures as appropriate and repeat the chlorination.

3.3. Dechlorinating Before Discharge

A. Before discharging highly chlorinated water, neutralize the chlorine in the water with about 6 milligrams of Sodium Thiosulfate per 1 mg/L of chlorine concentration per 1 gallon of water volume, or by other means conforming to ANSI/AWWA Standard C655.

B. Do not discharge water to the environment if the chlorine residual is greater than 1.0 mg/L.

C. Do not discharge water directly into surface water under any conditions.

3.4. Bacteriological Examination

A. After the system has been disinfected as specified, the Contracting Officer shall test the water for bacteriological contamination from representative points in the system. The

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DISINFECTION OF WATER WORKS

coliform organisms shall be tested for presence/absence in accordance with State drinking water regulations. If coliform bacteria are present, testing shall be repeated in accordance with State drinking water regulations. If the report of this examination is unsatisfactory, the system shall be flushed, and the disinfection procedure repeated until the results of bacteriological examinations are satisfactory.

B. The satisfactory quality of water delivered by the waterline should continue for a period of at least two full days, as demonstrated by laboratory examination of samples taken from taps along the system.

C. Bacterial testing of the water system will be the responsibility of the Forest Service.

D. Repeat disinfection of the water system shall be the responsibility of the Contractor with no additional expense to the Government.

END OF SECTION 22 119

Division 31 Earthwork

WARD LAKE AND COBBETT CGS WATER LINE REPLACEMENT 31 2317 - 1

TRENCHING, BEDDING AND BACKFILL FOR UTILITIES

SECTION 31 2317 – TRENCHING, BEDDING AND BACKFILL FOR UTILITIES

PART 1 - GENERAL

1.1. SUMMARY

A. The work in this Section includes excavation, dewatering, preparation of the trench bottom, supply and installation of bedding and backfill materials; and disposal of waste material for the installation of utilities and their related appurtenances.

1.2. QUALITY ASSURANCE

A. All trench excavation shall be performed in accordance with minimum requirements of

OSHA Regulations. The Contractor shall do all shoring, bracing and tight sheeting required to prevent caving and to protect personnel in accordance with OSHA requirements and to protect adjacent property and structures.

B. Discharge from dewatering operations shall be directed to approved natural drainages.

Discharge from dewatering operations shall be in accordance with rules and regulations established by the Colorado Water Quality Control Division.

1.3. SUBMITTALS

A. Contractor shall submit to the Contracting Officer for approval the source and certified sieve analyses of pipe bedding material and backfill materials.

1.4. PROJECT CONDITIONS

A. The types, sizes and approximate locations of known underground utilities have been shown on the drawings; however, no guarantee is made as to the true location of such utilities.

B. It is the Contractor's responsibility to verify the existence and location of all underground utilities at the project site. Contractor shall notify 'Call Before You Dig' at

(303) 232-1991 or "811" or www.colorado811.org, prior to any excavation work so local utility companies can locate their lines.

C. Existing Utilities: Do not interrupt utilities serving the Grand Mesa Visitor Center unless permitted in writing by the Contracting Officer.

PART 2 – PRODUCTS

2.1. BACKFILL MATERIALS, GENERAL

A. Excavated material may be processed and used for backfill if the Contractor can show compliance with the material specified herein to the satisfaction of the Contracting Officer. If excavated material is not sufficient to meet requirements, Contractor shall import needed material.

B. Satisfactory Soils: ASTM D 2487 soil classification groups GW, GP, GM, SW, SP, and SM, or a combination of these group symbols, free of rock or gravel larger than 3 inches in any dimension, debris, ice, frozen materials, vegetation, earth with high void content, waste material, and other deleterious matter.

C. Unsatisfactory Soils: ASTM D 2487 soil classification groups GC, SC, ML, MH, CL, CH, OL, OH, and PT, or a combination of these group symbols.

WARD LAKE AND COBBETT CGS WATER LINE REPLACEMENT 31 2317 - 2

1. Unsatisfactory materials also include manmade fills, trash, refuse, or backfills from previous construction.

2. Unsatisfactory material also includes material classification as satisfactory, which contains root and other organic matter, frozen material, and stones larger than 3 inches.

3. Unsatisfactory soils also include satisfactory soils not maintained within 2 percent of optimum moisture content at time of compaction.

2.2. BACKFILL AND FILL

A. Use satisfactory soil materials for backfill and fill.

2.3. BEDDING

A. Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand, ASTM D 2940, except with 100 percent passing a 1/2-inch sieve and not more than 8 percent passing a No. 200 sieve. On site materials may be used with approval of the Contracting Officer.

2.4. WARNING TAPE

A. Detectable Warning Tape: Acid- and alkali-resistant polyethylene film warning tape manufactured for marking and identifying underground utilities, minimum 3 inches wide and 4 mils (0.1 mm) thick, continuously inscribed with a description of utility, with metallic core encased in a protective jacket for corrosion protection, detectable by metal detector when tape is buried up to 30 inches deep, colored as follows:

1. Red: Electric.

2. Yellow: Gas.

3. Orange: Telephone & other communications

4. Blue: Water systems.

5. Green: Sewer systems.

2.5. PIPE SLEEVES

A. As specified in Section 33 1112 Water Distribution.

PART 3 – EXECUTION

3.1. ALIGNMENT AND GRADE

A. The location of all pipelines and utility structures shall be staked out and grades established by the Contractor. The Contracting Officer shall approve locations before excavation is started.

3.2. PREPARATION

A. Protect structures, utilities, sidewalks, pavements, roads, and other facilities from damage caused by settlement, lateral movement, undermining, washout and other hazards created by earthwork operations.

B. Protect subgrades and foundation soils against freezing temperatures or frost. Provide protective insulating materials as necessary.

C. Provide erosion-control measures to prevent erosion or displacement of soils and discharge of soil-bearing water runoff or airborne dust.

WARD LAKE AND COBBETT CGS WATER LINE REPLACEMENT 31 2317 - 3

3.3. SHEETING AND SHORING

A. Provide adequate shoring and bracing as required by OSHA and other local governing regulations.

B. Excavations and sides of trenches shall be supported with adequate materials as necessary for the safety of personnel and protection of the utility before backfilling.

C. The installation and removal of all sheeting, shoring, piling, and bracing shall be such as to maintain the required trench or excavated section, and to maintain the undisturbed state of the soils at and below the bottom of the excavation.

D. Sheet piling and timbers in trench excavations shall be withdrawn in such a manner as to prevent subsequent settlement of the pipe or additional backfill loadings which might overload the pipe.

E. All sheeting and shoring shall be removed when safe to do so.

3.4. DEWATERING

A. Prevent surface water and ground water from entering excavations, from ponding on prepared subgrades, and from flooding Project site and surrounding area.

B. Protect subgrades from softening, undermining, washout, and damage by rain or water accumulation.

1. Reroute surface water runoff away from excavated areas. Do not allow water to accumulate in excavations. Do not use excavated trenches as temporary drainage ditches.

2. Install a dewatering system to keep subgrades dry and convey ground water away from excavations. Maintain until dewatering is no longer required.

3.5. ROCK BLASTING

A. Refer to Section 31 1005 Rock Blasting.

3.6. EXCAVATION, GENERAL

A. If excavated materials intended for fill and backfill includes unsatisfactory soil materials and rock, replace with satisfactory soil materials.

B. Topsoil shall be removed from the area to be excavated and from the area where excavated material will be piled prior to excavation. Topsoil shall be stored as specified below.

C. Excavations left open at the end of the working day shall be fenced to protect the public.

D. Notify the Contracting Officer when excavation is completed. Do not place pipe, bedding or backfill until the excavation is approved by the Contracting Officer. Do not cover pipe until placement has been approved by the CO.

3.7. EXCAVATION FOR UTILITY TRENCHES

A. Excavate trenches to uniform widths to provide a working clearance on each side of pipe or conduit. Excavate trench walls vertically from trench bottom to 12 inches higher than top of pipe or conduit, unless otherwise indicated.

1. Minimum trench width: 18 inches.

2. Clearance (General): At least 6 inches on each side of pipe or conduit.

WARD LAKE AND COBBETT CGS WATER LINE REPLACEMENT 31 2317 - 4

3. Clearance from Electrical: 12 inches on each side of pipe or conduit B. Trench Bottoms: Excavate and shape trench bottoms to provide uniform bearing and support of pipes and conduit. Shape subgrade to provide continuous support for bells, joints, and barrels of pipes and for joints, fittings, and bodies of conduits. Remove projecting stones and sharp objects along trench subgrade.

3.8. STORAGE OF SOIL MATERIALS

A. Stockpile borrow materials and satisfactory excavated soil materials. Stockpile soil materials without intermixing. Place, grade, and shape stockpiles to drain surface water.

Cover to prevent windblown dust.

B. Stockpile soil materials away from edge of excavations. Do not store within drip line of remaining trees.

C. Stockpile in an orderly manner at a distance from the banks of the trench equal to ½ the depth of the excavation, but in no instance closer than 2 feet.

D. Other locations of stockpiles for satisfactory excavated material and borrow material shall be subject to prior approval of the Contracting Officer.

E. Topsoil shall be kept separate from trench-excavated material by stockpiling. Topsoil will be reused after backfilling on those areas from which it came.

3.9. PIPE SLEEVES

A. As specified in Section 33 1112 Water Distribution and shown on drawings.

3.10. UTILITY TRENCH BACKFILL AND COMPACTION

A. Backfill shall not be completed until the pipeline installation is approved by the

Contracting Officer and pressure and/or leakage tests have been performed and approved by the Contracting Officer.

B. Bedding material shall be brought up evenly on both sides of the pipe for the full length of the pipe.

C. Assure that the bedding is fully compacted under the haunches of the pipe, without damaging the pipe.

D. Satisfactory backfill shall be placed in uncompacted layers of 6 inches or less. Operate compaction equipment over the full width of each layer until there is no visible evidence of further consolidation. Compact the material with approved tampers.

3.11. WARNING TAPE

A. Place above underground utility as shown on drawings.

B. Place warning tape 4” to 8” below grade.

3.12. DISPOSAL OF SURPLUS AND WASTE MATERIALS

A. Disposal: Remove surplus satisfactory soil and waste material, including unsatisfactory soil, trash, and debris, and legally dispose of it off the National Forest System.

END OF SECTION 31 2317

Division 33 Utilities

WARD LAKE AND COBBETT CGS WATER LINE REPLACEMENT 33 1112 - 1

WATER DISTRIBUTION

SECTION 33 1112 - WATER DISTRIBUTION

PART 1 - GENERAL

1.1. SUMMARY

A. This Section includes piping and appurtenances for the potable-water distribution system. This Section also includes flushing and pressure testing waterlines.

1.2. SUBMITTALS

A. Product Data for the following:

1. Pipe and fittings

2. Compression couplings for similar and dissimilar pipes

3. Suction Strainer

4. Insect Screen

5. Gradation of Rip Rap

6. Curb Stop and Box

7. Gate Valve and Box

8. Operating Tools for Curb Stop and Gate Valve

9. MJ Adapter

10. Air and Vacuum Valve

11. Method for disposing water used in testing and disinfection of waterlines.

12. Backflow preventers and assemblies.

B. Operation and Maintenance Data: For the following:

1. Valves.

2. Backflow preventers.

3. Protective enclosures.

4. Hydrants.

1.3. QUALITY ASSURANCE

A. Regulatory Requirements:

1. Comply with standards of authorities having jurisdiction for potable-water-service piping, including materials, installation, testing, and disinfection.

B. Piping materials shall bear label, stamp, or other markings of specified testing agency.

C. NSF Compliance:

1. Comply with NSF 14 for plastic potable-water-service piping.

2. Comply with NSF 61 for materials for water-service piping and specialties for domestic water.

1.4. SYSTEM PERFORMANCE REQUIREMENTS

A. Minimum Working Pressures: The following are minimum pressure requirements for piping and specialties, unless otherwise indicated:

1. Potable-Water Service: 160 psig.

1.5. DELIVERY, STORAGE, AND HANDLING

WARD LAKE AND COBBETT CGS WATER LINE REPLACEMENT 33 1112 - 2

A. Deliver piping with factory-applied end caps. Maintain end caps through shipping, storage, and handling to prevent pipe-end damage and to prevent entrance of dirt, debris, and moisture.

B. Protect flanges, fittings, and specialties from moisture and dirt.

C. Store plastic piping protected from direct sunlight. Support to prevent sagging and bending.

PART 2 - PRODUCTS

2.1. GENERAL

A. All waterlines, pipes, and fittings shall be new and unused, of the type, pressure rating or class, and size specified and as shown on the drawings.

2.2. HIGH DENSITY POLYETHYLENE (HDPE) PIPE

A. Pipe

1. HDPE plastic pipe shall be PE-3408 as defined in ASTM D1248, with a minimum cell classification of 345464C in accordance with ASTM D3350. The pipe shall be SDR11, 160 psig minimum pressure rating and comply dimensionally with ASTM D3035.

2. Pipe shall be manufactured in accordance with AWWA C901 for sizes ½” through 3”.

3. HDPE pipe larger than 2” diameter shall be provided in 40-foot lengths rather than rolls. HDPE pipe 2” and smaller shall be provided in rolls.

4. The joining method shall be butt fusion method and shall be performed in strict accordance with the pipe manufacturer’s recommendations. Butt fusion equipment used in the joining procedures shall be capable of meeting all conditions recommended by the pipe manufacturer, including but not limited to, temperature requirements, alignment, and fusion pressures. Ribbed steel inserts with stainless steel clamps are not approved for HDPE pipe.

B. Fittings

1. HDPE fittings shall be made from material meeting the same requirements as the pipe.

2. Molded fittings shall be manufactured in accordance with either ASTM D2683 for socket fused or ASTM D3261 for butt fused and shall be so marked.

3. All HDPE fittings shall have the same, or higher, pressure rating and compositions.

2.3. GALVANIZED STEEL PIPE (GSP)

A. Use for last 10 feet of drain lines and for hydrants.

B. Pipe

1. ASTM A53 for pipe 4-inch diameter and smaller. Schedule 40.

2. Plain ends for joining with standard manufactured couplings.

3. Threaded ends shall meet requirements of ASME B1.20.1.

C. Fittings

WARD LAKE AND COBBETT CGS WATER LINE REPLACEMENT 33 1112 - 3

1. ASTM A53. Schedule 40.

2. For threaded ends use Teflon thread sealing tape.

2.4. PVC PIPE

A. Use for treatment building plumbing.

B. PVC, Schedule 80 Pipe: ASTM D 1785.

C. PVC, Schedule 80 Socket Fittings: ASTM D 2467

2.5. COUPLINGS FOR SIMILAR OR DISSIMILAR PIPE

A. Compression type transition fittings for making connections between like and dissimilar pipe materials shall be designed to enable a variety of connections between polyethylene pipe to various pipes. Fittings shall be Cepex performance series compression fittings as manufactured by Cepex Holding, S.A. and distributed by The Lateral Connection Corp., Langley, British Columbia, Canada, (855) 292-8240, or approved equal.

2.6. INSECT SCREEN

A. 24-mesh woven wire cloth, type 304 stainless steel standard grade, non-corrodible.

1. Mesh wire diameter: 0.014 inches +/- 0.005 inches

2. Mesh opening size: 0.0277 inches

3. Vendors include TWP <twpinc.com> and Grainger <grainger.com>

2.7. RIPRAP AT DAYLIGHT DRAIN

A. Riprap shall consist of hard, dense, durable stone, angular in shape and resistant to weathering. Rounded stone or boulders will not be accepted as riprap material.

Individual stones shall have dimensions of 6” to 12”. Source of stone shall be from rocks uncovered on site during construction operations, or from an approved off-site source.

2.8. CURB STOP

A. One-piece, closed-bottom body with tee head and plug integrally cast, o-ring sealed design, and 175 psig maximum working pressure.

B. Minneapolis pattern.

C. Female iron pipe inlet by female iron pipe outlet.

D. Hole for attaching curb box rod or handle in provided in tee head.

E. Heavy cast bronze body construction conforming to AWWA C800.

F. Curb stops shall be Mueller 300 Ball Curb Valve, model number B20287, as manufactured by Mueller Co., Decatur, Illinois, (800) 423-1323, or approved equal.

2.9. CURB BOX

A. Extension type curb box with threaded Minneapolis pattern base, cast iron base, steel pipe telescoping upper section.

B. Curb boxes shall be manufactured by the same company as the curb stop and sized to fit curb stop.

C. Lids shall be two-piece, cast iron with brass pentagon plug and have lettering “WATER” permanently imprinted on them.

D. Box shall be equipped with stationary rod. The rod length shall be within 12 inches of the top of the box.

WARD LAKE AND COBBETT CGS WATER LINE REPLACEMENT 33 1112 - 4

E. Curb box, complete with lid and stationary rod, shall be model H-10332-99000 for 2” valves, length as needed, as manufactured by Mueller Co., Decatur, Illinois, (800) 423- 1323, or approved equal.

2.10. TOOLS FOR OPERATING GATE VALVES, CURB STOPS

A. The Contractor shall supply four curb box pentagon keys, and two gate valve operating wrenches to operate valves and curb stops. Tools shall be as supplied by the valve, curb stop, or box manufacturer.

2.11. AIR AND VACUUM VALVE

A. Air and Vacuum Valve B. Valve shall operate by sealing the BUNA-N rubber outlet seat with a peripheral float as the liquid enters the valve chamber to raise the float. The valve shall satisfactorily withstand hydrostatic pressures of 300 psig. Cast iron body, top flange with brass trim, ½” NPT screwed inlet and outlet. Crispen A-5 valve, color beige, low pressure 2-40 psi, as manufactured by Multiplex Manufacturing Co., Berwick, PA (800) 247-8258, or approved equal.

C. Hydrant Post

1. As specified in Section 33 1219 Water Hydrants.

D. Vent

1. Aluminum double outlet tank vent, ¾” t-style, with 24 mesh stainless steel screen. FIG 155 tank vent as manufactured by Morrison Bros., Dubuque, IA,

(800) 377-5453 or approved equal as supplied by F.W.