Attachment_1_-_Specifications.pdf

SECTION-01009-1

GENERAL INFORMATION AND REQUIREMENTS

SECTION – 01009

GENERAL INFORMATION AND REQUIREMENTS

PART 1: GENERAL

1.01 SUMMARY:

A. Description of Work: Furnishing labor, equipment, supplies, and materials to trench and backfill in order to replace potable water lines, irrigation main lines, potable hydrants and the design and installation of underground sprinkler systems at all sites.

B. Location: Work under this contract is located at Devil’s Elbow Campground, Clark’s Bay Recreation site, White Sandy Campground (Lewis and Clark County, Montana), Holter Lake Campground and Log Gulch Campground (Cascade County, Montana) The work locations are shown on the drawings.

C. Terminology: References to Contracting Officer’s Representative means Bureau of Land Management (BLM) Engineer (406-208-6943), whom will serve as the Contracting Officer Representative during construction. References to “Government” means the Bureau of Land Management (BLM).

1.02 REFERENCES:

A. Referenced Specifications/Standards with Abbreviations and/or Acronyms: Wherever the following acronyms are used in these specifications or on the drawings, they are to be construed the same as the respective expressions represented. Copies of the referenced specifications/standards referred to herein may be procured by the Contractor, from the following:

ARM Administrative Rules of Montana (Referenced ARM’s are attached to this specification section) Administrative Rules Services P.O. Box 202801 Helena, MT 59620-2801

ASTM American Society for Testing and Materials 100 Barr Harbor Drive P.O. Box C700 West Conshohocken, PA 19428-2959

NSF National Sanitation Foundation 789 N. Dixboro Road P.O. Box 130140 Ann Arbor, MI 48105

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

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1.03 SUBMITTALS:

A. Scope: Submittals include manufacturers' literature, work schedules and substitution requests.

B. Requirements: Refer to specifications for submittals required. Allow at least 3 working days for review. Submittals shall be delivered to the Engineer and the Government at the

C. Submittal list:

1. All pipe (potable and irrigation) specifications

2. Backflow prevention specifications

3. Pressure gauge specifications

4. Flowmeter specifications

5. All fittings and appurtenances for potable lines will be submitted for NSF compliance

6. Electrical and backflow prevention certification

7. As-built for irrigation system at each site as described in 04000, Section 1.03A

8. Manual for operation and maintenance of each irrigation system as described in 04000, Section 1.03B and 1.03C

Pre-work Conference.

D. Identification of Submittals: Completely identify each submittal by showing at least the following information:

1. Name and address of submitter, plus name and telephone number of the individual to contact for further information.

2. Name of project as it appears in these specifications.

1.04 QUALITY ASSURANCE:

A. Codes and Standards: The work shall comply with codes and standards applicable to each type of work and as listed in the individual sections of these specifications. This contract incorporates materials, applications, and tests by reference, with the same force and effect as when they were given in full text.

B. Conflict: Where a conflict occurs between reference documents and project specifications, the project specifications shall govern.

1.05 DELIVERY, STORAGE, AND HANDLING:

A. Delivery: The Contractor shall protect products, incorporated into the work, from damage while in transit to the site. Products must be delivered in original unopened containers with manufacturer's name and brand designation and contents legibly indicated.

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B. Storage: The Contractor shall provide temporary storage facilities for products complying with manufacturer's recommendations which will protect them from damage until installation on the project and final acceptance. The storage area shall permit access for inspection and handling.

C. Handling: The Contractor shall load and unload products in such a manner that protects them from damage until installation on the project.

1.06 SITE CONDITIONS:

A. Environmental Considerations: Operations of the Contractor upon government premises including storage of materials, camping areas and equipment parking shall be confined to areas approved by the Government.

B. Noxious Weeds: The Contractor must wash all heavy equipment and vehicles prior to accessing BLM lands to prevent the spread of noxious weeds. Equipment or vehicles with visible dirt or plant parts will not be allowed into the project area until they are cleaned to the satisfaction of the Government.

1.07 SEQUENCING AND SCHEDULING:

A. Work Schedule: The schedule shall be submitted at the pre-work conference. When requested, the Contractor shall submit an updated schedule within 3 calendar days.

PART 2: PRODUCTS

(There are no applicable requirements.)

PART 3: EXECUTION

3.01 PROJECT MEETINGS:

A. Pre-Work Conference:

1. Notification: A pre-work conference will be held prior to the start of work. The Contractor will be notified in advance of meeting time, date and place.

The purpose will be to review required work, project drawings and specifications, construction schedules, payroll and payments, and administrative provisions of the contract.

2. Attendance: The Contractor, subcontractors and the person responsible for coordination of the work shall be present at the meeting.

3. Presentation: The Contractor shall be prepared to summarize and explain procedures planned for the project and present the submittals requested in the specifications.

B. Progress Meetings:

1. Location: Meeting shall be held at the project site, or as determined by the Engineer

SECTION-01009-4

and Government.

2. Notification: Meetings may be called by either the Government, the Engineer, or the Contractor. Request shall state who should attend.

C. Final Inspection:

1. Location: Meeting shall be held at the project site, or as determined by the Engineer or Government.

2. Notification: The Contractor shall notify the Government in writing at least 2 working days before the completion date so the Government can schedule final inspection.

PART 4: MEASUREMENT AND PAYMENT

4.01 METHOD OF MEASUREMENT:

A. Units: The work described in this section will not be measured for payment.

4.02 BASIS OF PAYMENT:

A. Payment: No direct payment for the work described under this section will be made. The Contractor shall include consideration for this item in the bid price for other items of the contract.

SECTION-01200-1

MOBILIZATION

SECTION – 01200

MOBILIZATION

PART 1: SCOPE

1.01 SUMMARY:

A. The work consists of mobilization and demobilization of the contractors forces and equipment necessary for performing the work required under the contract. It does not include mobilization and demobilization for specific items of work for which payment is provided elsewhere in the contract. Mobilization will not be considered as work in fulfilling the contract requirements for commencement of work.

PART 2: EQUIPMENT/MATERIAL

2.01 SUMMARY

A. Mobilization shall include all the activities and associated costs for transportation of contractors personnel, equipment and operating supplies to the site; establishment of offices, buildings and other necessary general facilities for the contractor’s operations at the site.

B. Demobilization shall include all activities and costs for transportation of personnel, equipment and supplies not required or included in the contract from the site; including the disassembly, removal and site cleanup of offices, buildings and other facilities assembled on the site specifically for this contract

C. The work includes mobilization and demobilization required by the contract at the time of award. If additional mobilization and demobilization activities and costs are required during the performance of the contract as a result of changed, deleted, or added items of work for which the contractor is entitled to an adjustment in contract price, compensation for such costs will be included in the price adjustment for the items or items of work added or changed.

PART 3: MEASUREMENT AND PAYMENT

4.01 METHOD OF MEASUREMENT:

A. Mobilization

1. The work described in this section for mobilization will be measured and paid as a lump sum. The work will include all items mentioned in Part 1 and Part 2.

SECTION-01200-2

MOBILIZATION

4.02 BASIS OF PAYMENT:

A. Payment: Prices and payment will be full compensation for the work described in this section. Payment will be made under:

Pay Item Pay Unit 01200(1) Mobilization LS

01200(2) Mobilization LS

END OF SECTION 01200

SECTION-02221-1

TRENCH EXCAVATION AND BACKFILL FOR PIPELINES

AND APPURTENANT STRUCTURES

SECTION 02221

TRENCH EXCAVATION AND BACKFILL

FOR PIPELINES & APPURTENANT STRUCTURES

PART 1: GENERAL

1.1 DESCRIPTION

A. This work is the excavation, trenching and backfilling for water lines and appurtenances. It includes all clearing, grubbing, site preparation, removal and disposal of debris from the excavation, handling and storing materials for fill and backfill, all bracing, shoring and trench protection, construction dewatering, all backfill, subgrade preparation, final grading, site dressing and cleanup.

B. The need for pipe bedding will be based on local soil and the Contracting Officer’s Representative’s (BLM Engineer) discretion.

1.2 REFERENCES

A. The current publications listed below form a part of this specification.

AASHTO T99 Moisture-Density Relations of Soils and Soil-Aggregate Mixtures Using 5-lb (2.5kg) Rammer and 12-inch (305mm) Drop

ASTM D698 Moisture-Density Relations of Soils and Soil-Aggregate Mixtures Using 5-lb (2.5kg) Rammer and 12-inch (305mm) Drop

AASHTO T191 Density of Soil In-Place by the Sand-Cone Method

(ASTM D1556)

AASHTO T238 (Density of Soil and Soil-Aggregate In-Place by Nuclear ASTM D2922) Methods (Shallow Depth)

AASHTO T239 Moisture Content of Soil and Soil-Aggregate In-Place by (ASTM D3017) Nuclear Methods (Shallow Depth)

AASHTO T11 Materials Finer Than 75mm (No. 200) Sieve in Mineral (ASTM C117) Aggregates by Washing

AASHTO T27 Sieve Analysis of Fine and Coarse Aggregate

(ASTM C136)

AASHTO T89 Determining the Liquid Limit of Soils

AASHTO T90 Determining the Plastic Limit and Plasticity Index of Soils

SECTION-02221-2

AND APPURTENANT STRUCTURES

ASTM D4318 Test Method for Liquid Limit, Plastic Limit and Plasticity

1.3 STANDARD DRAWINGS

A. Standard Drawings applicable to this section are as follows:

1. See details on Construction Plans.

2.1 PIPE BEDDING MATERIALS – No Pipe bedding required unless site conditions during excavation warrant bedding. This determination will be made by BLM engineer. If bedding is deemed necessary, the bedding will be installed as follows:

A. TYPE 1 PIPE BEDDING

1. Type 1 Pipe Bedding includes the material placed from 4 inches (100mm) below the bottom of the pipe, around the pipe, and up to 6 inches above the pipe.

2. Provide Type 1 Bedding consisting of sand, sandy gravel, or fine gravel having a maximum 3/4 inch size (19mm) and a maximum plasticity index of 6, determined by AASHTO T89 and T90 or by ASTM D4318.

3. Where trench excavation encounters wet or unstable material, Type 1 Pipe Bedding must be free draining and non-plastic.

2.2 TRENCH BACKFILL MATERIALS

A. Materials From Trench Excavations

1. Backfill material obtained from trench excavations must be free of cinders, ash, refuse, organic or frozen material, boulders, or other deleterious materials. Backfill materials and placement are further described in the execution Section of this specification.

2.3 DETECTABLE BURIED WARNING TAPE

A. Detectable buried warning tape is to have a minimum 6 inch (15cm) width and 5 mil (0.12mm) thickness and a solid aluminum core running the full length and width of the tape enclosed in a color coded inert plastic jacket, impervious to alkalis, chemical reagents and solvents in the soil. The tape is to meet APWA/ULCC Color Code requirements and is to have a maximum 36 inch (90cm) imprint. For this project the tape should be blue with text that reads as “Water Line Below”.

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AND APPURTENANT STRUCTURES

PART 3: EXECUTION

3.1 PROTECTION OF EXISTING PROPERTIES

A General

1. Take precautions to protect all adjoining private and public property and facilities, including underground and overhead utilities, curbs, sidewalks, driveways, structures, and fences. Restore or replace all disturbed or damaged facilities to its original condition at Contractor’s expense.

2. The Contractor will take necessary steps and precautions to keep trenching widths to a minimum and provide the necessary shoring required to protect adjacent buried utilities.

3. Contact utility owners using the Montana One Call System for utility locates before starting work. The Contractor is also responsible for ensuring that all private utilities are located within the work area. Protect the utilities exposed during the work and prevent damaging underground utilities adjacent to excavations. Immediately notify the utility owner of any construction damage. Repairs of damage to marked utilities are at the expense of the Contractor.

4. Cut and replace existing service lines interfering with trenching operations only with the Contracting Officer’s permission and at the Contractor’s expense.

5. Protect existing water and sewer mains and water and sewer services from freezing at all times during construction.

B. Existing Structures

1. Prevent damage to existing buildings or structures in the work area. Repair all construction related damage to the satisfaction of the Government.

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AND APPURTENANT STRUCTURES

C. Existing Overhead Utilities

1. Use extreme caution to avoid conflict, contact or damage to overhead utilities during the work.

D. Exploratory Excavation

1. The location of existing buried public and private utilities may need to be verified by exploratory excavation before construction.

2. Exercise care to prevent damaging all utilities and repair any utility damage caused by exploratory excavation.

E. When excavating across existing gravel surfacing or other developed surfaces, remove the surfacing material full depth and stockpile for reuse at the top of the trench or legally dispose of the surfacing material.

F. When excavating across cultivated or sodded areas, remove topsoil full depth or to a maximum 12 inch (30cm) depth, whichever is less, and stockpile for reuse at the top of the trench.

3.2. MAINTENANCE OF FLOWS

A. Maintain the flow of sewers, drains and water courses encountered during construction. Restore culverts, ditches, fences, crosswalks and structures disturbed by construction to their original condition upon completion of the work.

3.3 TRENCH EXCAVATION

A. General

1. Meet current OSHA Safety and Health Standards for all excavation, trenching, shoring, and related work.

2. Excavate at the specified locations for pipeline installations and appurtenant structures.

3. During excavation, stockpile backfill materials away from the trench banks to assure trench wall stability. Stockpile excavated materials on

SECTION-02221-5

AND APPURTENANT STRUCTURES

only one side of the trench without obstructing existing valves and other appurtenances. Assure surface drainage of adjoining areas is unobstructed.

4. Remove and dispose of all excess or unsuitable excavated materials on-site as directed by the Contracting Officer.

5. Prevent surface water from flowing into excavations. Promptly remove all water accumulating in trench excavations. Do not permit water to accumulate in any open trench. Remove and re-lay all pipe out of alignment or grade caused by trench flooding.

6. Grade the trench bottoms to the lines and grades, if specified. Assure bedding material provides uniform bearing and support for the pipe along its entire length. Excavate for joints after the trench bedding is graded, limiting the excavation to the required length, depth and width for making the particular type of joint used. Backfill over-excavations with Type 1 Bedding Material.

7. No differentiation between common and rock trench excavation is made, except when listed as separate bid items on the bid proposal or bid form.

Excavation includes removing and subsequent handling of all earth, gravel, bedrock or other material encountered regardless of the type, character, composition or condition of the material.

8. The use of trench digging machinery is permitted, except in places where its operation is likely to cause damage to existing structures or features, in which case hand methods are to be employed.

B. Trench Dimensions

1. Minimum depths shall be 24” for potable distribution lines. 6 ft (72”) burial for Devil’s Elbow supply line as shown in drawings.

2. Excavate to the trench dimensions specified below.

3. Width.

a. Excavate to provide room to install and join the pipe as specified.

The minimum trench width is 2'-0" in areas where the bury depth is 2’0”. Minimum trench width in other areas is 3’-6”. Maximum trench width may be specified in the contract documents.

4. Depth.

a. Excavate the trench as required for the invert grade or pipe bury as

SECTION-02221-6

AND APPURTENANT STRUCTURES

specified in the contract documents.

b. See Section 1.1 & 2.1. If BLM Engineer determines bedding is necessary, excavate an additional 4” below invert of pipe to accommodate Type 1 Pipe Bedding. If bedrock, boulders or large stones are encountered at the bottom of the trench, excavate at least 6 inches (15cm) below the bottom of the pipe for backfilling with Type 1 Pipe Bedding.

C. Pavement Damage Caused by Equipment

1. Equip all track mounted equipment operated on pavement surfacing with pads to prevent pavement damage.

2. Restore all pavement damaged by construction to its original condition.

D. Shoring, Bracing and Sheeting

1. Provide all shoring, bracing and tight sheeting required to prevent caving and protect workers, meeting current Occupational Safety and Health Act Requirements, and to protect adjacent property and structures. The cost of this work is included in the cost for trench excavation.

E. Excavations for Appurtenances

1. Make excavations for structures and other appurtenances of the size and depth to permit compacting of backfill on all sides. The requirements for removing water and other applicable portions of these specifications apply to excavation for appurtenances.

3.4 DEWATERING

A. Remove all ground water encountered in trench excavations. Do not place pipe, bedding or backfill materials below the groundwater elevation established by dewatering operations. The cost of dewatering operations is considered a part of the excavation cost.

3.5 EXCAVATION STABILITY AND SAFETY

A. The stability of construction excavations and associated worker safety, including slope geometry and shoring/bracing considerations, are the responsibility of the Contractor. Meet current OSHA regulations.

3.6 TRENCH FILLING AND BACKFILLING

A. General

SECTION-02221-7

AND APPURTENANT STRUCTURES

1. Backfill all trenches as specified immediately after grade, alignment and pipe jointing has been inspected and approved by the Contracting Officer’s Representative. Conduct any pipe testing as specified in section MT-04000, 5.02 B and MT-02665, 3.03 B. Correct all defects discovered by tests prior to backfilling.

B. Pipe Bedding Placement

1. Type 1 Bedding

a. See Section 1.1 and 2.1. If BLM Engineer determines bedding is necessary, install as follows:

b. Place Type 1 Pipe Bedding material 4 inches (10cm) under the pipe, around the pipe, and up to 6 inches above the pipe. Place in maximum lifts of 6 inches (15cm), using hand or other compaction methods without damaging or disturbing the pipe. Thoroughly compact each layer. Use special care to assure compaction under the pipe haunches.

c. Place backfill material in equal lifts on both sides of the pipe for the full trench width. Take care to prevent migration of Type 1 Bedding into surrounding soils during placement and compaction.

C. Trench Backfill.

1. After the pipe bedding materials are placed and compacted as specified, backfill the trench. Use backfill material free of cinders, ash, refuse, organic or frozen material, boulders, or other deleterious materials. From the top of the Select Type 1 Pipe Bedding to 6 inches (15cm) below the ground surface, or the subgrade elevation, material containing rock up to 8 inches (20cm) in the greatest dimension may be used.

2. Remove, replace, and backfill in trenches where settlement has occurred as directed by the Contracting Officer’s Representative at the Contractor’s expense.

D. Backfill for Appurtenances

1. Place and compact backfill for appurtenances to finished grade around valve boxes and other underground items without disturbing alignments.

2. Meet the backfill material, placement, and compaction requirements specified for the adjoining trench.

E. Detectable Buried Warning Tape

SECTION-02221-8

AND APPURTENANT STRUCTURES

1. Provide warning tape as described in PRODUCTS Section 2.3. Bury tape a maximum 8 inches below finish surface grade.

3.7 BORING AND SLEEVING

A. Boring shall be used to route pipe, wiring or both under concrete or asphalt structure such as walks or curbs where trenching is impractical. Sleeves shall be installed in bore holes.

B. Boring shall be accomplished by drill, auger, water jet or any other instrument approved by the Contracting Officer’s Representative capable of producing a precise hole.

C. All sleeving in soil shall be installed and backfilled with the same considerations for protection of the materials as if it were water pipe. Compaction shall be to the same standard as the adjoining undisturbed soil and sleeves shall protect at least 12” on either side of the hard surface being crossed.

D. Sleeving being installed across roads or driveways for later use shall have the necessary pipe installed at the same time with each end of elbowing at least 36” above grade.

E. When it is not possible to install sleeving, the water pipe shall be Series 160 Polyethylene.

3.8 SURVEY MARKERS AND MONUMENTS

A. Protect all survey markers and monuments. Protection includes marking with flagged high lath and supervising work near markers and monuments. Do not disturb monuments without prior approval from the Contracting Officer.

3.9 CLEANUP

A. As work progresses, remove debris and complete to finish grade each portion of the work. Once the work is complete, clear debris and finish the entire site to smooth, uniform slopes presenting a neat and workmanlike appearance. Remove and dispose of all rocks brought to the surface during excavation or backfilling.

PART 4: MEASUREMENT AND PAYMENT

4.1 METHOD OF MEASUREMENT

A. Trenching, Backfilling and Compacting:

SECTION-02221-9

AND APPURTENANT STRUCTURES

1. The work described in this section for trenching, backfilling and compacting will be measured and paid for by the linear foot as measured along the ground surface over the completed utility trench. The work will include all labor, equipment, tools and incidentals necessary for excavation, backfill and compaction.

B. Imported Bedding Material:

1. Bedding material will be measured by the loose cubic yard furnished and placed around utility piping in trenches. The work will include all labor, equipment, tools, hauling and incidentals. Determination of quantities shall be as follows:

a. Loose material hauled shall be weighed at a certified scale and tickets given to the Contracting Officer.

b. Loose material hauled shall then be divided by the wet density of the material to obtain the loose cubic yards delivered.

4.2 BASIS OF PAYMENT

A. Payment: Prices and payment will be full compensation for the work described in this section. Payment will be made under:

02221 (1) Trench excavation and backfill… LF

02221 (2) Trench excavation and backfill… LF

02221 (3) Trench excavation and backfill… LF

02221 (4) Trench excavation and backfill… LF

02221 (5) Trench excavation and backfill… LF

END OF SECTION 02221

SECTION-02665-1

WATER SYSTEMS

SECTION MT-02665

PART 1: GENERAL

1.01 SUMMARY:

A. Section Includes: Furnishing labor, equipment, supplies, and materials, to replace the distribution lines for Devil’s Elbow Campground, Clark’s Bay Recreation site, White Sandy Campground, Holter Lake Campground and Log Gulch Campground as shown on the drawings and specified herein.

1.02 REFERENCES:

A. American Society for Testing and Materials:

ASTM A 53 REV A-89 Pipe, Steel, Black and Hot-Dipped Zinc-Coated Welded and Seamless

ASTM D 1784-81 Rigid Poly (Vinyl Chloride) (PVC) Compounds and Chlorinated Poly (Vinyl Chloride) (CPVC) Compounds

ASTM D 1785-89 Poly (Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120.

ASTM D 2241-89 Poly (Vinyl Chloride) (PVC) Pressure-Rated Pipe (SDR Series) ASTM D 2466-89 Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40 ASTM D 2467-89 Socket-Type Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80 ASTM D 2564-88 Solvent Cements for Poly (Vinyl Chloride) (PVC) Plastic Pipe and Fittings ASTM D 2672-89 Joints for IPS PVC Pipe Using Solvent Cement ASTM D 2774-72 Underground Installation of Thermoplastic Pressure Piping ®

1983) ASTM D 2855-83 Making Solvent-Cemented Joints with Poly (Vinyl Chloride)

(PVC) Pipe and Fittings ASTM F 656 REV A-89 Primers for Use in Solvent Cement Joints of Poly (Vinyl Chloride)

(PVC) Plastic Pipe and Fittings

B. National Sanitation Foundation (NSF).

C. American Wood Preserver's Association.

D. Uniform Federal Accessibility Standards (USAF).

1.03 SUBMITTALS:

A. Provide manufacturer’s specifications, parts lists, cut sheets, operating characteristics and maintenance manuals for all materials listed.

SECTION-02665-2

1.04 QUALITY ASSURANCE:

A. Failure Criteria: Not limited to the following:

1. Evidence of leakage

2. Evidence of breakage of pipe

3. Malfunctioning valves

4. Blockage of piping

5. Contamination of water, rendering it not potable

6. Pressure drop

7. Bury depth less than minimum shown on drawings or in MT-02221, 3.3 B.1.

B. Labeling Requirements: high density polyethylene (HDPE) pressure pipe plastic pipe and fittings shall carry the National Sanitation Foundation (NSF) seal of approval for potable water pipe. Contracting Officer’s Representative will confirm before installation.

1.05 DELIVERY, STORAGE, AND HANDLING:

A. Storage: Store materials and equipment according to the manufacturer's instructions. Store plastic piping under cover out of direct sunlight.

PART 2: PRODUCTS

2.01 MATERIALS:

A. Pipe and Fittings: Pipe size, type and ratings shall be as shown on the drawings or as specified. Fittings shall be the same size as the adjoining pipeline except where reducers are required to enter a valve body or reduce to another pipe size. Fitting pressure ratings shall be equal to or greater than 125 psi. Pipe and fittings shall be manufactured of material approved by NSF for potable water systems. Contracting Officer’s Representative will confirm before installation.

1. HDPE Pipe: Shall conform to ASTM D3035 and ASTM F1055

B. Potable Water Service Lines:

1. Distribution and Irrigation lines: Shall be 1-1/4” HDPE 4710 DR-13.5-160 psi, as specified in drawings. Supply line shall be 2” HDPE 4710 DR-13.5 160 psi.

SECTION-02665-3

C. Transition Fittings: Shall be HDPE 4710 DR-13.5-160 psi butt weld stainless threaded transition. No compression fitting.

D. Fittings: All nipples, tees, elbows, and adapter shall be the size specified on the drawings.

E. Hydrants: Hydrants will be Government furnished property and provided to contractor prior to construction.

PART 3: EXECUTION

3.01 PREPARATION:

A. Clearing and Grubbing and Topsoil Removal: Shall be according to Section 02221 – Trenching, Backfilling and Compacting.

B. Excavation and Backfill: Shall be according to Section 02221 - Trenching, Backfilling and Compacting.

C. Demolition: Contractor to abandon in place all existing waterlines. If existing waterlines or irrigation lines are encountered during excavation, those small sections that interfere with installation of new lines will be removed.

3.02 INSTALLATION:

A. General: No pipe shall be installed in water. Keep the interior of the pipe clean. The pipe shall not be covered until the pressure test has been approved. Ends of lines shall be capped leaving sufficient space for later removal.

1. Install piping at same slope as existing pipe.

2. Install piping free of sags and bends.

3. Locate groups of pipes parallel to each other, spaced to permit valve servicing.

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

B. HDPE: HDPE pipes shall be installed according to ASTM D 2774. Interior of the pipe shall be kept clean. The pipe shall not be covered until the pressure tests have been approved by the Government.

C. Pipeline Bedding: Shall be according to Section MT-02221 - Trenching, Backfilling and Compacting.

SECTION-02665-4

3.03 FIELD QUALITY CONTROL:

A. General: It is the Contractor's responsibility to perform all required tests. The Contractor shall supply and temporarily install a pressure gauge on each portion of pipeline being tested, to monitor any pressure drop during the test. The test will be performed prior to backfill after the line is completed and flushed.

B. Testing Procedure: Tests shall be conducted as follows:

1. For the pressure test, the Contractor shall notify the Government 24 hours prior to testing. The Government must witness this test. Failure to notify the Government shall result in a repeat of the test even if that requires re-excavation of the portion being tested. The portion being tested shall be pressurized to the maximum operating pressure. Do not fill the pipe at a rate greater than 1 foot per second. The pressure shall be held for a minimum of 1 hour; then inspected for failure criteria. Correct deficiencies evident during the test and repeat the test until approved. After approval, the Contractor may complete backfilling.

C. Final Test: A final system test shall be conducted on the total system after completion of backfilling. Pressurize the system in accordance with 3.03 B. The pressure shall be maintained for a period of 4 hours; then the system inspected for failure criteria.

All deficiencies evident shall be corrected and the test repeated until approved.

3.04 CLEANING:

A. Disinfection: Shall be according to DEQ Circular-3 requirements

PART 4: MEASUREMENT AND PAYMENT

4.01 METHOD OF MEASUREMENT:

A. Units: No payment shall be made until all pressure tests have been completed and approved.

1. Pipe Replacement: The work described in this section for the water system pipe replacement will be paid by the linear foot (LF) under 02665(.)

2. Government furnished hydrants will be paid by the induvial hydrant (EA) under 02665(.)

3. The pressure test will be paid as a lump sum (LS) under 02665(.)

SECTION-02665-5

4. Disinfection of the water system will be paid as a lump sum (LS) under 02665(.)

4.02 BASIS OF PAYMENT:

A. Payment: Prices and payment listed below will be full compensation for the work described in this section. Payment will be made under:

Pay Item Pay Unit

02665(1) 1.25” 4710 DR 13.5 HDPE Pipe .................................................... LF

02665(2) Installation of potable hydrants ...................................................... EA

02665(3) Disinfection of System ................................................................... LS

02665(4) Pressure Test ................................................................................... LS

02665(5) 1.25” 4710 DR 13.5 HDPE Pipe .................................................... LF

02665(6) Installation of potable hydrants ...................................................... EA

02665(7) Disinfection of System ................................................................... LS

02665(8) Pressure Test ................................................................................... LS

02665(9) 1.25” 4710 DR 13.5 HDPE Pipe .................................................... LF

02665(10) Installation of potable hydrants .................................................... EA

02665(11) Disinfection of System ................................................................. LS

02665(12) Pressure Test ................................................................................. LS

02665(13) 1.25” 4710 DR 13.5 HDPE Pipe .................................................. LF

02665(14) Installation of potable hydrants .................................................... EA

02665(15) Disinfection of System ................................................................. LS

02665(16) Pressure Test ................................................................................. LS

02665(17) 2” 4710 DR 13.5 HDPE Pipe ....................................................... LF

END OF SECTION 02665

SECTION-04000-1

IRRIGATION

SYSTEMS

SECTION MT-04000

IRRIGATION SYSTEMS

PART 1: GENERAL

1.01 SCOPE OF WORK:

A. Supply and install the components required for an automatic irrigation system to provide supplemental water to the intended landscape efficiently and uniformly.

1.02 QUALITY ASSURANCE:

A. All irrigation work shall be done by an experienced and qualified irrigation contractor and competent personnel adequate to the scope of work.

B. A written guarantee of the installed system shall be provided to the owner covering workmanship and materials for a minimum of one year.

1.03 SUBMITTALS:

A. A suitably scaled “As-Built” drawing shall be provided. All components of the irrigation system shall be shown as installed, with clear measurements from an identifiable reference point to the locations of the controller and its circuit breaker, master valve, zone control valves, main water connection, blow out connection, pump and it electrical connections and any other similar features. Please see Figure 6 for details.

B. Provide a manual containing operating and maintenance instructions for all components of the system including but not limited to a zone map or list of zones and the areas they cover.

C. Provide clear instructions for operating the irrigation system “in season”, showing the relative timing differences between zones and different precipitation rates and a schedule of run times suggested for various weather conditions.

D. Provide special tools as provided by the manufacturer for day-to-day servicing of the irrigation equipment installed.

E. Contractor will submit electrical and backflow prevention inspection and certification information to Contract Officer’s Representative before payment .

SECTION-04000-2

1.04 SITE CONDITIONS

A. Verify and mark the location of all on site utilities required by the irrigation system.

B. Verify and mark the location of all buried cables, conduits, pipes, etc., prior to any trenching.

C. Adjust the layout as necessary, together with the Contracting Officer’s Representative (BLM Engineer), to suit existing site conditions and grades before proceeding with the work.

D. Protect from damage as necessary, existing landscape features and plant material structures from this work in progress.

E. Ensure that sequencing of this work is carried out in coordination with the work of other trades and that sleeves are installed when appropriate.

1.05 OWNER OR REPRESENTATIVE

A. All project engagement will be routed through the Contracting Officer by either directly contacting the Contracting Officer or routing through the Contracting Officer’s Representative (BLM Engineer).

1. All technical questions will be routed through the Contracting Officer's Representative, who will then route them to the Contracting Officer.

1.06 REGULATIONS

A. Obtain all permits and licenses applicable to the work to be done.

B. Ensure that there is compliance with the relevant codes and regulations both in the layout and during the conduct of the work involved in the project.

1.07 MATERIALS

A. All materials will be approved by the Contracting Officer’s Representative prior to the use of those materials.

B. The materials must all remain compatible.

C. All materials proposed must be applied according to their manufacturer's recommendations.

PART 2: IRRIGATION LAYOUT The irrigation system must apply a consistent, uniform, measurable amount of water to the landscape. It is necessary that the system consider water cost and conservation, long term durability, maintenance cost, safety issues, aesthetic issues and site-specific requirements. System should prioritize use of large, rotary or impact sprinklers whenever

SECTION-04000-3

possible. Minimal use of smaller, pop-up sprinklers may be needed. System will not utilize drip or brush irrigation.

2.01 SPRINKLERS

A. The maximum spacing shall be equal to the radius of throw (head to head) with appropriate allowance for wind.

B. The selection of pop-up riser style sprinklers must consider safety, maintenance, risk of vandalism and appearance on the site.

C. Pop-up or riser height must consider the related plant material, its growth potential, interfering landscape features and arrive at a solution that provides optimum coverage.

D. All sprinklers must be suitably adjustable and located so as to keep the water within the landscaped area and minimize overthrow.

E. Sprinklers with built in check valves must be used when low head drainage is apparent to eliminate wasted water and reduce erosion.

F. Pressure compensating devices (heads, screens, or valves) are recommended to increase efficiency and water conservation.

2.02 PIPE

A. The velocity of flow in piping must not exceed 5 feet per second.

B. Pipe routing must take site elevation changes into consideration to minimize low head drainage.

C. Pipe Sizing and Routing must include pressure loss calculations to ensure that the required pressure will be delivered under operation.

2.03 ZONING

A. All sprinklers grouped into a zone must have the same precipitation rates. Rotating heads should take into account arcs of coverage to ensure matched precipitation.

B. The potential for low head drainage must be minimized for each zone.

C. The areas of the landscape that have different water requirements must be identified and a determination made as to the significance of these differences and whether they require separate zoning.

D. The pressure variation within each zone from the first to last head must not exceed 15%.

SECTION-04000-4

2.04 CONTROLS

A. Controllers must be approved, suitable for their mounting location and sufficiently flexible to allow for and encourage optimum operation of the system in all circumstances.

B. Valves must meet the pressure and flow requirements of the zone being controlled.

C. Indoor rated controllers should only be mounted indoors or outdoors in suitable weather-tight enclosures.

2.05 PRESSURE CONTROL

A. The system must include suitable regulation of the pressure throughout the irrigation system utilizing such devices as pressure compensating valves, heads and screens.

B. The pressure at every head must be within the range recommended by the manufacturer of the head/nozzle combination being used.

2.06 WINTERIZING

A. The system must make the water connection and all the system components safe from winter freezing damage.

B. A suitable and convenient blow out point and connection is the most desirable method of purging the system of water using a suitably sized air compressor.

2.07 CONTROL WIRE

A. Control wire must be sized to the length of its run using the recommendations of the manufacturer of the zone control valve being wired.

B. A spare wire should be available at each valve manifold.

SECTION-04000-5

PART 3: MATERIALS- All materials shall be approved by Contracting Officer’s Representative before installation.

3.01 SPRINKLERS

A. All sprinklers shall be in new condition with the size, manufacturer and features shown.

B. The relevant manufacturers recommendations must be followed in the selection and application of each sprinkler being used.

3.02 CONTROL VALVES

A. All control valves shall be in new condition with the size, manufacturer and features shown.

B. The relevant manufacturers recommendations must be followed in the selection and application of each control valve being used.

3.03 ISOLATION VALVES

A. All isolation valves shall be in new condition with the size, manufacturer and features shown.

B. Valves ½” through 2 ½” may be ball or gate valves while those larger shall be operated by butterfly valves.

3.04 CONTROLLERS

A. All controllers shall be in new condition with the size, manufacturer and features shown.

B. All controllers shall be approved for use in the mounting location selected.

3.05 WIRE

A. All power and control wiring and its associated components shall conform to any local code.

B. All wire shall be sized and specified per Section 2.07 above.

C. Line voltage wire shall be installed by a certified electrician with the requisite qualifications.

D. Approved multi-conductor control wire may be used if it is specifically manufactured for use as

SECTION-04000-6

direct burial irrigation wire.

E. White wire shall only and always be used as the common wire.

F. All connectors shall be approved for watertight application and assembled according to manufacturer’s recommendations.

G. No wire smaller than 18 gage shall be used

3.06 BACKFLOW PREVENTION DEVICES

A. All backflow prevention devices shall be in new condition with the size, manufacturer and features shown.

B. All devices used must be approved for the application and must meet or exceed the local plumbing requirements.

3.07 PIPE – POLYETHYLENE (PE)

A. All pipe shall be in new condition, extruded from virgin materials and continuously and permanently marked with manufactures name, material, size and pressure rating.

B. All pipe must be Series rated for pressure equal to 100 PSI minimum.

3.08 FITTINGS

A. Fittings for PE pipe may be compression style or insert fittings with strength at least equal to the pipe used complete with all stainless-steel clamps.

B. PE barb fittings and marlex street ells are acceptable for use with ½” swing pipe or triple joint assemblies

3.09 VALVE BOXES

A. All valve boxes shall be in new condition with the size, manufacturer and features shown.

3.10 SLEEVING

A. Sleeving material shall be Series 160 PVC unless the circumstances of its installation require a stronger material to ensure its survival during ongoing construction.

SECTION-04000-7

B. Sleeving shall be sized to be twice the size of pipe being protected if lateral line and three times the size if main line

3.11 HYDRAULIC CONTROLS

A. Hydraulic control lines and the associated water filtration equipment shall be as recommended by the manufacturer of the control devices being used.

PART 4: INSTALLATION

4.01 EXCAVATION AND BACKFILL

A. Minimum burial to finish grade is 12” in landscaped areas and 24” when sleeved under roadways except for:

a. All irrigation main lines that share common trenching with potable water lines will defer to the minimum depth for potable water line burial (24”).

B. All trenches shall be as straight as possible with a level, uniform slope to the bottom.

C. Backfill trenches to the level of the surrounding area, ensuring that the material is free of rocks and/or other unsuitable materials which could damage the pipe or create unusual settlement problems.

D. Backfill material around the swing joints and under the heads shall be of a suitable type so as to allow appropriate movement under impact.

E. Trenches shall be at least 12” away from paving stone or other hard surfaces to avoid undermining such surface or its edge retention.

4.02 PIPE

A. Visually inspect each pipe prior to installation, removing any dimpled or otherwise damaged sections.

B. Lay the pipe in a straight line between fittings, placing it on firm soil at all points in the trench.

C. Multiple pipes may occupy the same trench provided that a minimum of 2” horizontal clearance can be maintained and the pipes are all on the same plane.

SECTION-04000-8

D. All polyethylene (PE) insert fittings in 1 ½” and 2” sizes shall be double clamped.

E. As the pipe layout in the design is diagrammatic, care must be taken during the installation to size the pipe to keep velocity of flow at 5 feet per second or less.

4.03 VALVES AND VALVE BOXES

A. All valve boxes shall be installed flush with finished grade and located in areas away from well-traveled areas, RV pull-ins, etc. to limit tampering by the recreating public.

B. All valves shall be installed vertically and centered in the box so as to be easily accessible for servicing.

C. All valve boxes shall be installed with adequate clearance above the pipe and on a firm base so as not to contact the pipe with settlement or upon being depressed.

D. Valve boxes shall be supported and of a type of material such as to be able to support the weight of expected traffic.

E. Minimum valve box sizes will be approved by Contracting Officer’s Representative prior to installation.

4.04 SPRINKLERS

A. All pop-up sprinklers shall be connected to the pipe by an adjustable swing joint assembly that is sized to meet the flow requirements of the sprinkler.

B. A swing joint assembly shall be a polyethylene (PE) swing pipe with a barb by pipe thread elbow at each end; the end that connects to the base of the sprinkler must have an extra threaded street elbow.

C. All sprinklers with an inlet size larger than ¾” shall use a pre-assembled swing joint only.

D. Swing joint assemblies for valve-in-head sprinklers shall have Acme threads and an O ring sealing mechanism.

E. The minimum length of polyethylene tubing for swing joint assemblies shall be 12”.

F. All pop-up sprinklers shall be installed flush and level with the finished grade and not higher than any adjoining hard surface from which there must be at least a 2” separation to allow for edging.

SECTION-04000-9

G. All piping must be thoroughly flushed prior to the installation of sprinklers and nozzles.

4.05 WIRE

A. All wiring shall be installed to meet local electrical codes.

B. All wiring shall be protected by being bundled and taped at 10 foot intervals and installed beneath the irrigation piping or in appropriately sized conduit if run independently.

C. All wire splices must be contained in a valve box.

D. Sufficient extra wire shall be left in each valve box such that the splice may be lifted 12” above grade. Extra wire to be neatly coiled.

E. White wire shall only be used as the common wire and other colors used shall be consistent from valve to controller.

4.06 BACKFLOW PREVENTION

A. Backflow prevention assemblies shall be installed according to the local plumbing code.

B. All cross-connection control devices installed must be sized to accommodate the flow requirements present, and successfully tested after installation by a certified Backflow Prevention Tester.

4.07 CONTROLLER

A. The controller shall be firmly mounted at approximate eye level with all the wiring done in the controller or an approved junction box.

B. Zones shall be wired in a logical sequence and unless they can be clearly described, a scaled site plan shall be mounted next to the controller with each zone clearly outlined.

4.08 SLEEVING AND BORING

A. Boring shall be used to route pipe, wiring or both under concrete or asphalt structures such as walks or curbs where trenching is impractical. Sleeves shall be installed in all bored holes.

SECTION-04000-10

B. Boring shall be accomplished by drill, auger, water jet, or any other instrument approved by the Contracting Officer’s Representative capable of producing a precise hole. Boring shall not disturb overlaying structures or cause settlement and damage to those structures.

C. All sleeving in soil shall be installed and backfilled with the same considerations for protection of the material as if it were water pipe. Compaction shall be to the same standard as the adjoining undisturbed soil and sleeves shall project at least 12” on either side of the hard surface being crossed.

D. Sleeving being installed across roads or driveways for later use shall have the necessary pipe installed at the same time with each end elbowing at least 36” above grade.

E. When it is not possible to install sleeving, the water pipe shall be Series 160 Polyethylene.

4.09 SITE MAINTENANCE

A. The job site shall be kept in a neat, clean and orderly condition at all times during the installation process.

B. All scrap and excess materials are to be regularly removed from the site and not buried in trenches.

C. Trenching, laying pipe and backfilling shall be contiguous so that the amount of open trench at the end of each work-day is minimized. As per section 5.02, all pipe will be pressure tested before backfilling. Any open trench or other excavations shall be barricaded and marked with high visibility flagging tape.

PART 5: INSPECTION AND TESTING

5.01 INSPECTION

A. Upon completion of the irrigation system installation, all pressure regulation, arcs, distances of throw, sprinkler locations and height, controller zones, etc., must be adjusted so as to optimize the operation of the system and make it ready for inspection and testing.

B. Inspection will be carried out by the Contracting Officer’s Representative to ensure that the work has been done in a neat and workmanlike fashion and meets the intent of the installation standards previously agreed upon, in all important aspects.

5.02 TESTING

A. The contractor will furnish all necessary testing equipment and personnel.

SECTION-04000-11

B. Before backfill, all lines will be pressure tested at the maximum operating pressure for a minimum of 1 hr, per MT-02665, 3.03 B.

C. Correct all leaks and retest until accepted by the Contracting Officer’s Representative.

D. Final testing will demonstrate the entire completed system operation to the Contracting Officer’s

Representative, proving the system is properly adjusted for radius and arc of coverage and the system is fully operational.

PART 6: MEASUREMENT AND PAYMENT

6.0 METHOD OF MEASUREMENT:

A. Units: No payment shall be made until all pressure tests have been completed and approved.

1. Payment will be made based on sq-ft of system installed (total coverage area).

6.01 BASIS OF PAYMENT:

A. Payment: Prices and payment listed below will be full compensation for the work described in this section. Payment will be made under:

Pay Item Pay Unit

04000 (1) Devil’s Elbow Irrigation System ................................................... ACRE

04000 (2) Clark’s Bay Irrigation System ..............................................