Specs.docx

Table of Contents

PART 1 - GENERAL

1.1 SUMMARY

A. Work for this project consists of installation approximately 1200 feet of 6 inch PVC pipe, tied into existing 8 inch wood stave water line, from that point to termination of a natural drainage. The trenching location will be staked prior to start of work by The Government.

1.2 GENERAL SITE CONDITIONS AND WEATHER

Spec. Writer: EDIT paragraph below specific to the site.

A. The elevation of the site is approximately 1,500 feet above mean sea level. Weather conditions at Fenn Ranger station can be very wet. Normal spring weather begins in February and is rainy until the middle or end of June. From July to the end of August is usually dry with occasional thunderstorms or light sprinkles. September thru November can be rainy or moist. Snow does not typically occur until late November or December and lasts until February.

Spec. Writer: edit paragraph below specific to the site. Coordinate blasting permission with section 02300.

B. In-depth soil surveys have not been performed; however, rocks at the ground surface are evident throughout the area. The Contractor should expect to encounter such rock during excavation and grubbing operations. Blasting of rocks will not be permitted.

C. In-depth water table surveys have not been performed; however, if water is encountered during excavation, the Contractor shall perform adequate dewatering (Section 02240) to keep the excavation free from water and dispose of the water without damage to property.

1.3 USE OF PREMISES

spec writer: Delete this Article if Owner places strict limitations on Contractor's use of premises, and use Division 1 Section "Work Restrictions" instead. Expand Article if Owner's restrictions are minor. See the Evaluations in Division 1 Section "Work Restrictions.”

spec writer: Retain paragraph below if Project is on a vacant site or in an unoccupied building being renovated and there are no Owner-occupancy requirements. Revise to suit Project.

A. General: The Contractor shall have use of utilities available on the premises for construction purposes. Contractor's use of utilities is limited only by the Government's right to perform work or to retain other contractors on portions of Project. With approval by the Moose Creek Ranger District, National Forest Service lands may be used by the Contractor to have one fully contained equipment trailer which may remain at this site for security.

B. Contractor shall at all times conduct his operations to ensure the least inconvenience to the public and employees.

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

D. Contractor shall provide adequate signing and barricades and take necessary safety measures to protect the public during all construction operations. Contractor shall minimize disturbance of all undisturbed areas.

E. 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 and 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.

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 known 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.

spec writer Insert additional paragraphs to specify minor restrictions on Contractor's use of premises or to specify minor limitations because of Owner occupancy.

1.4 MEALS AND LODGING

A. Meals and lodging are commercially available in the City of Kooskia within 30 miles of the construction site. Meals or lodging will not be available at Forest Service facilities.

1.2 1.3 1.4

1.5 CAMPING

A. NONE.

1.6 CONSTRUCTION SEQUENCE

A. There is no specified construction sequence or season for this project.

B. Depending on conditions, normal fire restrictions may apply to activities associated with this project.

C. The Contractor may have an option to develop water and/or power utilities in the early stages of construction so they may be used for the remainder of the construction project.

SECTION 01010 SUMMARY OF WORK

1.7 FIELD VERIFICATION

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

1.8 SUBMITTALS

A. Product Data for the following:

1. Pipe and fittings

2. Compression couplings for similar and dissimilar pipes

3. Insect Screen

4. Gradation of Rip-Rap

PART 2 - PRODUCTS (NOT USED) PART 3 - EXECUTION (NOT USED)

SECTION 01010 SUMMARY OF WORK

END OF SECTION 01010

SECTION 01011

MOBILIZATION

1. GENERAL

1.1 SUMMARY

A. This item is intended to compensate the Contractor for operations including, but not limited to, those necessary for the movement of personnel, equipment, supplies, and incidentals to the project site; for payment of premiums for bonds and insurance for the project; and for any other work and operations which must be performed or costs that must be incurred incident to the initiation of meaningful work at the site and for which payment is not otherwise provided for under the contract.

1.2 MEASUREMENT AND PAYMENT

B. The measurement shall be lump sum for mobilization. Payment shall be as follows:

1. Measurement will be made on a lump sum basis.

PART 1 - PRODUCTS (NOT USED)

PART 2 - EXECUTION (NOT USED)

END OF SECTION 01011

SECTION 01011 MOBILIZATION

A. The intent of this section is to explain, in general; what is and what is not included in a bid item; the limits or cut-off points where one bid item ends and another begins; and method of measurements and basis of payment for work items listed in the Bid Item Schedule.

B. Work:

1. Furnishing all labor, materials, equipment, and other incidentals necessary to successfully complete the project or any portion of it, and carrying out all duties and obligations imposed by the contract.

C. Payment:

1. 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, as shown on the drawings, and as staked in the field.

2. Measurement and payment for contract work shall be made only for and under those pay items included in the Schedule of Items. All other work and materials shall be considered incidental or as included in the payment for items shown.

1.2 DETERMINATION OF QUANTITIES

A. The contractor shall perform, or cause to be performed, all measurement of quantities of materials incorporated into the work processes that are to be measured under the provisions of the contract.

B. Quantity Measurements:

1. The Contractor shall make all measurements for computation of quantities for all work items except those specified for payment by Designed Quantity (DQ) or Lump Sum Quantity (LSQ).

2. The contractor shall compute the quantities for periodic progress payments; the Contracting Officer shall compute the quantities for the final payment based on measurements taken by the Contractor.

3. All Contractor measurements are subject to verification.

4. The Contractor shall submit all field notes, calculation sheets, and other data used to determine quantities.

SECTION 01025 DEFINITION OF BID ITEMS AND

MEASUREMENT AND PAYMENT

5. The Contractor shall certify in writing as to the accuracy of the measurements and computations submitted.

C. The following measurements and calculations are used to determine contract quantities.

1. For individual construction items, longitudinal and lateral measurements for area computations shall be made horizontally or corrected to horizontal measurement unless otherwise specified. Measurements for geotextiles, netting and erosion control blankets shall be along slope lines.

2. The average end area method shall be used to compute volumes of excavation or embankment. However, if in the judgment of the Contracting Officer (CO), the average end area method is impractical, measurement shall be made by volume in hauling vehicles or by other three dimensional methods.

3. Structures shall be measured according to neat lines shown on the drawings or as altered by the CO, in writing, to fit field conditions.

4. For items that are measured by the linear foot, such as pipe culverts, fencing, guardrail, and underdrains, measurements shall be made parallel to the base or foundation upon which the structures are placed. Pipes shall be measured along center of invert.

5. For aggregates weighed for payment, the tonnage shall not be adjusted for moisture content, unless otherwise provided for.

6. For standard manufactured items--such as fence, wire, plates, rolled shapes, pipe conduits--identified by gauge, weight, section dimensions, and so forth, such identifications shall be considered the nominal weights or dimensions. Unless controlled by tolerances in cited specifications, manufacturer's tolerances shall be accepted.

1.3 UNITS OF MEASUREMENT

A. Payment shall be by units defined and determined according to U.S. Standard measure and by the following:

B. Cubic Yard: A measurement computed by one of the following methods:

1. Excavation, Embankment, or Borrow. The measurement computed by the average end area method from measurements made longitudinally along a centerline or reference line.

2. Material in Place or Stockpile. The measurement computed using the dimensions of the in-place material.

3. Material in the Delivery Vehicle. The measurement computed using measurements of material in the hauling vehicles at the point of delivery. Vehicles shall be loaded to at least their water level capacity. Leveling of the loads may be required when vehicles arrive at the delivery point.

C. Each: One complete unit, which may consist of one or more parts.

D. Linear Foot: Linear feet measured horizontally.

1.4 DEFINITION OF BID ITEMS

A. Definition of Bid Item No. 01001 MOBILIZATION

1. Description: < Mobilization includes moving personnel, equipment, material, and incidentals to the project sites and performing all work necessary before beginning work at the project sites. Mobilization also includes the obtaining of permits, insurance, and bonds.>

a. Measurement and payment: < Measurement will be made on a lump sum basis > B. Definition Bid Item No. 02316 EXCAVATION, TRENCHING, AND BACKFILLING FOR UTILITIES SYSTEMS

1. Description: <02316 Includes all necessary trenching, excavation, installation of new irrigation line and all work incidental to completion of irrigation water system >

2. Measurements and Payment: Irrigation pipe line trenching/excavation and installation and all work/materials incidental to complete project will be paid on a Linear Foot basis when completed and work approved by the CO, bid item 02316 will be eligible for payment.

PART 2 - METHOD OF MEASUREMENT

2.1 GENERAL

A. One of the following methods of measurement for determining final payment is designated on the Schedule of Items for each pay item:

B. DESIGNED QUANTITIES (DQ)

1. These quantities denote the final number or units to be paid for under the terms of the contract. They are based upon the original design data available prior to advertising the project. Original design data include the preliminary survey information, design assumptions, calculations, drawings, and the presentation in the contract. Changes in the number of units shown in the Schedule of Items may be authorized under any of the following conditions:

a. As a result of changes in the work authorized by the CO.

b. As a result of the CO determining that errors exist in the original design that cause a pay item quantity to change by 15 percent or more.

c. As a result of the Contractor submitting to the CO a written request showing evidence of errors in the original design that cause a pay item quantity to change by 15 percent or more. The evidence must be verifiable and consist of calculations, drawings, or other data that show how the designed quantity is believed to be in error.

C. ACTUAL QUANTITIES (AQ)

1. These estimated quantities which are determined from actual measurements of completed work.

D. LUMP SUM QUANTITIES (LSQ)

1. These quantities denote one complete unit of work as required by or described in the contract, including necessary materials, equipment, and labor to complete the job. They shall not be measured.

PART 3 - EARTHWORK TOLERANCES

3.1 GENERAL

A. Adjustments of horizontal alignment, within the tolerances specified in this contract, or shifts of balance points up to 100 feet shall be made by the contractor as necessary to produce the sections and to balance earthwork. Such adjustments shall not be considered as "Changes."

END OF SECTION 01025

PART 1-GENERAL

1.1 USE OF PREMISES

A. Use of Site: Limit use of premises to work in areas indicated. Do not disturb portions of site beyond areas in which the Work is indicated.

1. Limits: Confine constructions operations to <staked control line>.

2. Government Occupancy: Allow for Government occupancy of site and use by the public.

3. Driveways and Entrances: Keep driveways and entrances serving premises clear and available to Occupants, Government employees, and emergency vehicles at all times. Do not use these areas for parking or storage of materials.

a. Schedule deliveries to minimize use of driveways and entrances.

b. Schedule deliveries to minimize space and time requirements for storage of mate- rials and equipment on-site.

B. Use of Existing Building: Repair damage(s) caused by construction operations. Protect building and its occupants during construction period.

1.2 OCCUPANCY REQUIREMENTS

A. Full Government Occupancy: Government will occupy site and existing buildings during en- tire construction period. Cooperate with Government during construction operations to mini- mize conflicts and facilitate Government usage. Perform the Work so as not to interfere with Government operations.

PART 2- PRODUCTS (NOT USED) PART 3- EXECUTION (NOT USED)

SECTION 01140

WORK RESTRICTIONS

END OF SECTION 01140

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes demolition and removal of the following:

1. Selected portions of a structure.

2. Selected site elements.

3. Repair procedures for selective demolition operations.

1.2 DEFINITIONS

A. Remove: Detach items from existing construction and legally dispose of them off-site, unless indicated to be removed and salvaged or removed and reinstalled.

B. Remove and Salvage: Detach items from existing construction and deliver them to Govern- ment.

C. Remove and Reinstall: Detach items from existing construction, prepare them for reuse, and reinstall them where indicated.

D. Existing to Remain: Existing items of construction that are not to be removed and that are not otherwise indicated to be removed, removed and salvaged, or removed and reinstalled.

1.3 MATERIALS OWNERSHIP

A. Except for items or materials indicated to be reused, salvaged, reinstalled, or otherwise indi- cated to remain Government property, demolished materials shall become Contractor's proper- ty and shall be removed from Project site.

1.4 SUBMITTALS

A. NONE:

1.5 PROJECT CONDITIONS

A. Government will occupy portions of building adjacent to selective demolition area. Conduct selective demolition so Government operations will not be disrupted. Provide not less than 72 hours notice to CO of activities that will affect Government operations.

B. Maintain access to existing walkways, corridors, and other adjacent occupied or used facili- ties.

1. Do not close or obstruct walkways, corridors, or other occupied or used facilities with- out written permission from authorities having jurisdiction.

C. Government assumes no responsibility for condition of areas to be selectively demolished.

1. Conditions existing at time of inspection for bidding purpose will be maintained by Government as far as practical.

D. Hazardous Materials: It is not expected that hazardous materials will be encountered in the Work.

1. If materials suspected of containing hazardous materials are encountered, do not dis- turb; immediately notify Contracting Officer (CO). Hazardous materials will be re- moved by Government under a separate contract.

E. Storage or sale of removed items or materials on-site will not be permitted.

F. Utility Service: Maintain existing utilities indicated to remain in service and protect them against damage during selective demolition operations.

1. Maintain fire-protection facilities in service during selective demolition operations.

2. Electrical: Notify CO in writing 72 hours in advance if service will be interrupted to any buildings or structures.

1.6 WARRANTY

A. Existing Warranties: Remove, replace, patch, and repair materials and surfaces cut or dam- aged during selective demolition, by methods and with materials so as not to void existing warranties.

1. If possible, retain original Installer or fabricator to patch the exposed Work listed below that is damaged during selective demolition. If it is impossible to engage original In- staller or fabricator, engage another recognized experienced and specialized firm.

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 mate- rials that visually match existing adjacent surfaces to the fullest extent possible.

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

PART 3 – EXECUTION

3.1 EXAMINATION

A. Verify that utilities have been disconnected and capped.

B. Survey existing conditions and correlate with requirements indicated to determine extent of selective demolition required.

C. Inventory and record the condition of items to be removed and reinstalled and items to be re- moved and salvaged.

D. When unanticipated mechanical, electrical, or structural elements that conflict with intended function or design are encountered, investigate and measure the nature and extent of conflict. Promptly submit a written report to CO.

3.2 UTILITY SERVICES

A. Existing Utilities: Maintain services and protect them against damage during selective demolition operations.

B. It is not anticipated that underground utilities will be encountered along the proposed routing. However, it is the contractors responsibility to locate, identify, disconnect, and seal or cap off utilities.

C. Do not interrupt existing utilities serving occupied or operating facilities unless authorized in writing by CO and authorities having jurisdiction. Provide temporary services during inter- ruptions to existing utilities, as acceptable to CO and to authorities having jurisdiction.

1. Provide at least 72 hours' notice to CO if shutdown of service is required during changeover.

D. Utility Requirements: Locate, identify, disconnect, and seal or cap off indicated utilities serv- ing areas to be selectively demolished.

1. Arrange to shut off indicated utilities with utility companies.

2. If utility services are required to be removed, relocated, or abandoned, provide tempo- rary utilities before proceeding with selective demolition that bypass area of selective demolition and that maintain continuity of service to other parts of building.

3. Cut off pipe or conduit in walls or partitions to be removed. Cap, valve, or plug and seal remaining portion of pipe or conduit after bypassing.

E. Utility Requirements: Do not start selective demolition work until utility disconnecting and sealing have been completed and verified in writing.

3.3 PREPARATION

A. Site Access and Temporary Controls: Conduct selective demolition and debris-removal op- erations to ensure minimum interference with roads, streets, walks, walkways, and other adja- cent occupied and used facilities.

1. Do not close or obstruct streets, walks, walkways, or other adjacent occupied or used facilities without permission from CO and authorities having jurisdiction. Provide al- ternate routes around closed or obstructed traffic ways if required by governing regula- tions.

2. Erect temporary protection, such as walks, fences, railings, canopies, and covered pas- sageways, where required by authorities having jurisdiction.

3. Protect existing site improvements, appurtenances, and landscaping to remain.

SECTION 01732

SELECTIVE DEMOLITION

B. Temporary Facilities: Provide temporary barricades and other protection required to prevent injury to people and damage to adjacent buildings and facilities to remain.

3.4 POLLUTION CONTROLS

A. Dust Control: Use water mist, temporary enclosures, and other suitable methods to limit spread of dust and dirt. Comply with governing environmental-protection regulations.

3.5 SELECTIVE DEMOLITION

A. General: Demolish and remove existing construction only to the extent required by new con- struction 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 cut- ting 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 con- cealed spaces, such as duct and pipe interiors, verify condition and contents of hidden space before starting flame-cutting operations. Maintain portable fire-suppression de- vices during flame-cutting operations.

B. Removed and Reinstalled Items:

1. Clean and repair items to functional condition adequate for intended reuse. Paint equipment to match new equipment.

C. Existing Items to Remain: Protect construction indicated to remain against damage and soil- ing 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.

3.6 PATCHING AND REPAIRS

A. General: Promptly repair damage to adjacent construction caused by selective demolition op- erations.

B. Repairs: Where repairs to existing surfaces are required, patch to produce surfaces suitable for new materials.

3.7 DISPOSAL OF DEMOLISHED MATERIALS

A. General: Promptly dispose of demolished materials. Do not allow demolished materials to accumulate on-site.

B. Burning: Do not burn demolished materials.

C. Disposal: Transport demolished materials off Government property and legally disposes of them.

END OF SECTION 01732

A. This Section includes the following:

1. Protecting existing trees and vegetation to remain.

2. Removing trees and other vegetation.

3. Clearing and grubbing.

4. Topsoil stripping.

5. Removing above-grade site improvements.

6. Disconnecting, capping or sealing, and abandoning site utilities in place.

7. Disconnecting, capping or sealing, and removing site utilities.

1.2 MATERIALS OWNERSHIP

A. Except for materials indicated to be stockpiled or to remain Government’s property, cleared materials shall become Contractor's property and shall be removed from the site.

1.3 PROJECT CONDITIONS

A. Traffic: Minimize interference with adjoining roads, streets, walks, and other adjacent occupied or used facilities during site-clearing operations.

B. Salvable Improvements: Carefully remove items indicated to be salvaged and store on Government's premises where indicated.

C. Notify utility locator service for area where Project is located before site clearing.

PART 2 - PRODUCTS

2.1 SOIL MATERIALS

A. Satisfactory Soil Materials: As specified in Division 2 Section "Excavating, Trenching, and Backfilling."

1. Obtain approved borrow soil materials off-site when satisfactory soil materials are not available on-site.

PART 3 - EXECUTION

3.1 PREPARATION

SECTION 02230 SITE CLEARING

A. Provide erosion-control measures to prevent soil erosion and discharge of soil-bearing water runoff or airborne dust to adjacent properties and walkways.

B. Vegetation or trees to be removed or felled are flagged. Written approval by the CO is required to fell any trees within the area required to appropriately complete the project.

C. Protect existing site improvements to remain from damage during construction.

1. Restore damaged improvements to their original condition, as acceptable to CO.

3.2 TREE PROTECTION

A. Where excavation for new construction is required within drip line of trees, hand clear and excavate to minimize damage to root systems. Use narrow-tine spading forks, comb soil to expose roots, and cleanly cut roots as close to excavation as possible.

B. Repair trees and vegetation indicated to remain that are damaged by construction operations, in a manner approved by CO.

3.3 UTILITIES

A. Locate, identify, disconnect, and seal or cap off utilities indicated to be removed.

B. Do not interrupt utilities serving facilities occupied by Government or others unless permitted. Arrange to provide temporary utility services.

C. Excavate for and remove underground utilities indicated to be removed.

3.4 CLEARING AND GRUBBING

A. Remove obstructions, trees, shrubs, grass, and other vegetation to permit installation of new construction. Removal includes digging out stumps and obstructions and grubbing roots.

B. Fill depressions caused by clearing and grubbing operations with satisfactory soil ma- terial, unless further excavation or earthwork is indicated.

1. Place fill material in horizontal layers not exceeding 8-inch (200-mm) loose depth, and compact each layer to a density equal to adjacent original ground.

3.5 TOPSOIL STRIPPING

A. Remove sod and grass before stripping topsoil.

B. Strip topsoil to whatever depths are encountered in a manner to prevent intermingling with underlying subsoil or other waste materials.

C. Stockpile topsoil materials away from edge of excavations without intermixing with subsoil. Grade and shape stockpiles to drain surface water. Cover to prevent wind- blown dust.

3.6 SITE IMPROVEMENTS

A. Remove existing above- and below-grade improvements as indicated and as necessary to facilitate new construction.

3.7 DISPOSAL

A. Disposal: Remove surplus soil material, unsuitable topsoil, obstructions, demolished materials, and waste materials, including trash and debris, and legally dispose of them off Government’s property.

END OF SECTION 02230

PART 1 -1GENERAL

A. This Section includes construction dewatering.

1.2 PERFORMANCE REQUIREMENTS

A. Dewatering Performance: Design, furnish, install, test, operate, monitor, and maintain dewatering system of sufficient scope, size, and capacity to control ground-water flow into excavations and permit construction to proceed on dry, stable subgrades.

1.3 QUALITY ASSURANCE

A. Regulatory Requirements: Comply with water disposal requirements of authorities having jurisdiction.

PART 2 - PRODUCTS (NOT USED) PART 3 - EXECUTION

3.1 PREPARATION

A. Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards cre- ated by dewatering operations.

1. Prevent surface water and subsurface or ground water from entering excava- tions, from ponding on prepared subgrades, and from flooding site and sur- rounding area.

2. Protect subgrades and foundation soils from softening and damage by rain or water accumulation.

3.2 INSTALLATION

A. Install dewatering system complete with pump equipment, standby power and pumps, filter material gradation, valves, appurtenances, water disposal, and surface-water controls.

B. Before excavating below ground-water level, place system into operation to lower wa- ter to specified levels. Operate system continuously until dewatering is no longer required.

SECTION 02240 DEWATERING

C. Provide an adequate system to lower and control ground water to permit excavation, construction of structures, and placement of fill materials on dry subgrades. Install sufficient dewatering equipment to drain water-bearing strata above and below bottom of foundations, drains, sewers, and other excavations.

1. Do not permit open-sump pumping that leads to loss of fines, soil piping, sub- grade softening, and slope instability.

D. Reduce hydrostatic head in water-bearing strata below subgrade elevations of founda- tions, drains, sewers, and other excavations.

1. Maintain piezometric water level a minimum of [24 inches (600 mm)] below surface of excavation/trench.

E. Dispose of water removed by dewatering in a manner that avoids endangering public health, property, and portions of work under construction or completed. Dispose of water in a manner that avoids inconvenience to others. Provide sumps, sedimentation tanks, and other flow-control devices as required by authorities having jurisdiction.

F. Provide standby equipment on-site, installed and available for immediate operation, to maintain dewatering on continuous basis if any part of system becomes inadequate or fails. If dewatering requirements are not satisfied due to inadequacy or failure of de- watering system, restore damaged structures and foundation soils at no additional ex- pense to Owner.

1. Remove dewatering system from Project site on completion of dewatering.

G. Damages: Promptly repair damages to adjacent facilities caused by dewatering opera- tions.

END OF SECTION 02240

A. Includes excavating, trenching, backfilling and compacting for the installation of utility lines to the depths and dimensions as staked and approved by the CO.

1.2 PROTECTION

A. Maintain the excavations to guard against and prevent injury to employees and the public. Provide adequate shoring and bracing as required.

B. Protect the excavation from frost action. Compact ground that has frozen and subsequently thawed as specified herein.

C. Prevent water accumulation in excavations. If clay soil becomes saturated, compact after it has dried as specified herein.

D. Minimum depth of soil cover for utility lines (measured from the top of the pipe, conduit, or cable to final construction ground elevation required):

E. Protect existing underground utilities from damage.

1.3 DEGREE OF COMPACTION

A. Degree of compaction shall be expressed as a percentage of the maximum density obtained by the test procedure presented in ASTM D 1557

SECTION 02316

EXCAVATION, TRENCHING, AND BACKFILLING FOR UTILITIES SYSTEMS

1.4 SUBMITTALS

A. The following shall be submitted in accordance with Section “Submittals.”

1. Reports.

a. Field Density Tests. Testing of Backfill Materials

b. Copies of all field test reports within 24 hours of the completion of the test.

1.5 DEFINITIONS

A. Backfill: Soil materials used to fill an excavation.

B. Bedding Course: Layer placed over the excavated subgrade in a trench before laying pipe.

C. Borrow: Satisfactory soil imported from off-site for use as fill or backfill.

D. Drainage Course: Layer supporting slab-on-grade used to minimize capillary flow of pore water.

E. Excavation: Removal of material encountered above subgrade elevations.

1. Additional Excavation: Excavation below subgrade elevations as directed by Contracting Officer (CO). Additional excavation and replacement material will be paid for according to Contract provisions for changes in the Work.

2. Unauthorized Excavation: Excavation below subgrade elevations or beyond indicated dimensions without direction by CO. Unauthorized excavation, as well as remedial work directed by CO, shall be without additional compensation.

F. Fill: Soil materials used to raise existing grades.

G. Subgrade: Surface or elevation remaining after completing excavation, or top surface of a fill or backfill immediately below subbase, drainage fill, or topsoil materials.

H. Utilities include on-site underground pipes, conduits, ducts, and cables, as well as underground services within buildings.

PART 2 – PRODUCTS

2.1 MATERIALS

A. 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 2 inches in any dimension, debris, waste, frozen materials, vegetation, and other deleterious matter. Contents suitable for the intended use.

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. Unsatisfactory materials also include manmade fills, trash, refuse, or backfills from previous construction. Unsatisfactory material also includes material classification as satisfactory, which contains root and other organic matter, frozen material, and stones larger then 3 inches. The (CO) shall be notified of any contaminated materials.

B. Cohesionless and Cohesive materials: Cohesionless materials shall include materials classified in ASTM D 2487 as GW, GP, SW, AND SP. Cohesive materials shall include materials classified as GC, SC, ML, CL, MH, and CH. Materials classified as GM and SM shall be identified as cohesionless only when the fines are nonplastic.

C. Rock (NOT APPLICABLE).

D. Unyielding Material: Unyielding material shall consisting of gravelly soils with stones greater than 3 inches in any dimension or as defined by the pipe; manufacturer, whichever is smaller.

E. Unstable material: Unstable material shall consist of materials too wet to properly support the utility pipe, conduit, or appurtenant structure.

F. Backfill and Fill: Satisfactory soil materials.

G. Subbase: Natural mixture of natural gravel, stone, and natural sand; ASTM D 2940; with at least 90 percent passing a 1-1/2 inch (38 mm) sieve and not more than 12 percent passing a No. 200 (0.75 mm) sieve.

H. Base: Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand; ASTM D 2940; with at least 95 percent passing a 1-1/2 inch (38 mm) sieve and not more than 8 percent passing a No. 200 (0.75 mm) sieve.

I. Bedding: ¾” minus gravel located at O-Hara Bar Gravel Pit.

J. Detectable Warning Tape: Polyethylene film warning tape encasing a metallic core, minimum 6 inches (150 mm) wide and 4 mils (0.1 mm) thick, continuously inscribed with a description of the utility.

PART 3 – EXECUTION

3.1 EXCAVATION

A. Excavation shall be performed to the lines and grades indicated. Excavations shall be unclassified. During excavation, material satisfactory for backfilling shall be stockpiled 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. Excavated material not required or not satisfactory for backfill shall be disposed of off site. The Contractor shall be responsible for disposal of materials. Grading shall be done as may be necessary to prevent surface water from flowing into the excavation, and any water accumulating shall be removed to maintain the stability of the bottom and sides of the excavation. Unauthorized over excavation shall be backfilled in accordance with paragraph BACKFILLING AND COMPACTION at no additional cost to the Government.

B. Trench Excavation requirements: The trench shall be excavated as recommended by the manufacturer of the pipe to be installed. Trench walls below the top of the pipe shall be sloped, or made vertical, and of such width as recommended in the manufacturer’s installation manual. Where no manufacturer’s installation manual is available, trench walls shall be made vertical, Trench walls more than 5 feet high shall be shored, cut back to a stable slope, or provided with equivalent means of protection for employees who may be exposed to moving ground or cave in or as recommended in OSHA Standards 29 CFR. Trench walls, which are cut back, shall be excavated to at least the angle of repose of the soil. Special attention shall be given to slopes, which may be adversely affected by weather or moisture content. The trench width blow the top of pipe shall not exceed 24 inches plus pipe outside diameter (O.D.) for pipes of less than 24 inches inside diameter and shall not exceed 36 inches plus pipe outside diameter for sizes larger than 24 inches inside diameter. Where recommended trench widths are exceeded, redesign, stronger pipe, or special installation procedures shall be utilized by the Contractor. The cost of redesign, stronger pipe, or special installation procedures shall be borne by the Contractor without any additional cost to the Government.

1. Bottom Preparation: The bottom of trenches shall be accurately graded to provide uniform bearing and supported for the bottom quadrant of each section of the pipe. Bell holes shall be excavated to the necessary size at each joint or coupling to eliminate point bearing. Stones of 3 inches or greater in any dimension, or as recommended by the pipe manufacturer, whichever is smaller, shall be removed to avoid point bearing.

2. Removal of Unyielding Material: Where unyielding material is encountered in the bottom of the trench, such material shall be removed 4 inches below the required grade and replaced with suitable materials as provided in paragraph BACKFILLING and COMPACTION.

3. Removal of Unstable Material: Where unstable material is encountered in the bottom of the trench, such material shall be removed to the depth directed and replaced to the proper grade with base material as provided in paragraph BACKFILLING AND COMPACTION. When removal of unstable material is required due to the Contractor’s fault or neglect in performing the work, the resulting material shall be excavated and replaced by the Contractor without additional cost to the Government.

Excavation for Appurtenances: Excavation for manholes, catch basins, inlets, or similar structures shall be of sufficient size to permit the placement and removal of forms for the full length and width of structure footings and foundations as shown. Removal of unstable material shall be as specified above. When concrete or masonry is to be placed in an excavated area, special care shall be taken not to disturb the bottom of the excavation. Excavation to the final grade level shall not be made until just before the concrete or masonry is to be placed.

4. Jacking, Boring, and Tunneling: Unless otherwise indicated, excavation shall be by open cut except that sections of a trench may be jacked, bored, or tunneled if, in the opinion of the Contracting Officer, the pipe, cable, or duct can be safely and properly installed and backfill can be properly compacted in such sections.

C. Stockpiles: Stockpiles of satisfactory materials shall be placed and graded as specified. Stockpiles shall be kept in a neat and well-drained condition, giving due consideration to drainage at all times. The ground surface at stockpile locations shall be cleared, grubbed, and sealed by rubber-tired equipment, excavated satisfactory and unsatisfactory materials shall be separately stockpiled. Stockpiles of satisfactory materials shall be protected from contamination, which may destroy the quality and fitness of the stockpiled material. If the Contractor fails to protect the stockpiles, and any material becomes unsatisfactory, such material shall be removed and replaced with satisfactory material from approved borrow sources at no additional cost to the Government. Locations of stockpiles of satisfactory materials shall be subject to prior approval of the Contracting Officer. The Contractor shall be responsible for obtaining approved borrows materials from sources off site, as required.

3.2 BACKFILL AND COMPACTION

A. Backfill material shall consist of satisfactory material, base material, or backfill material as required. Backfill shall be placed in layers not exceeding 6 inches loose thickness for compaction by hand operated machine compactors, and 8 inches loose thickness for other than hand operated machines, unless otherwise specified. Each layer shall be compacted to full width until there is no visible evidence of further consolidation.

B. Trench Backfill: Trenches shall be backfilled to the grade shown. The trench shall be backfilled to 2 feet above the top of pipe prior to performing the required pressure tests. The joints and couplings shall be left uncovered during the pressure test. The trench shall not be backfilled until all specified tests are performed.

1. Replacement of Unyielding Material: Unyielding material removed from the bottom of the trench shall be replaced with base or backfill material.

2. Replacement of Unstable Material: Unstable material removed from the bottom of the trench or excavation shall be replaced with base material in layers not exceeding 6 inches loose thickness.

3. Bedding Backfill: Bedding shall be of the type as defined and the thickness indicated under 3.3 SPECIAL REQUIREMENTS and on the plans.

4. Backfill material shall be placed and compacted with approved tampers to a height of at least one foot above the utility pipe or conduit. The backfill shall be brought up evenly on both sides of the pipe for the fill length of the pipe. Care shall be taken to ensure through compaction of the fill under the haunches of the pipe.

5. Final Backfill: The remainder of the trench shall be filled with satisfactory material. Backfill material shall be placed and compacted as follows:

Turfed or Seeded areas and Miscellaneous areas: Backfill shall be deposited in layers of a maximum of 12 inch loose thickness, and compacted to 85 percent maximum density for cohesive soils and 90 percent maximum density for cohesionless soils. This requirement shall also apply to all other areas not specifically designated above.

C. Backfill for Appurtenances: After the manhole, catch basin, inlet, or similar structure has been constructed and the concrete has been allowed to cure for 3 days, backfill shall be placed in such a manner that the structure will not be damaged by the shock of falling earth. The backfill material shall be deposited and compacted as specified fore final backfill, and shall be brought up evenly on all sides of the structure to prevent eccentric loading and excessive stress.

3.3 SPECIAL REQUIREMENTS

Special requirements for both excavation and backfill relating to the specific utilities are as follows:

A. Irrigation Lines: Trenches shall be excavated to provide a minimum cover of 36 inches.

B. Bedding Shall provide a minimum 4” thickness around the irrigation pipe.

3.4 TESTING

Testing shall be the responsibility of the Contractor and shall be performed at no additional cost to the Government.

A. Field Tests: Tests shall be performed in sufficient numbers to ensure that the specified density is being obtained. A minimum of one field density test per lift of backfill for every 500 feet of installation shall be performed. Field in-place density shall be determined in accordance with Section 3.2 Part (A). Trenches improperly compacted shall be reopened to the depth directed, then refilled and compacted to the density specified at no additional cost to the Government.

END OF SECTION 02316

A. This Section includes piping and appurtenances for irrigation-water service. This Section also includes flushing, and testing.

1.2 SUBMITTALS

A. Product Data for the following:

1. Pipe and fittings

2. Compression couplings for similar and dissimilar pipes

3. Insect Screen

4. Gradation of Rip-Rap

1.3 QUALITY ASSURANCE

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

1.4 SYSTEM PERFORMANCE REQUIREMENTS

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

1. Water Service: 160 psig.

1.5 PROJECT CONDITIONS

A. Existing Utilities: Do not interrupt utilities serving facilities occupied by Government or others unless permitted under the following conditions and then only after arranging to provide temporary utility services according to requirements indicated:

1. Notify Contracting Officer (CO) not less than two days in advance have pro- posed utility interruptions.

2. Do not proceed with utility interruptions without CO's written permission.

1.6 DELIVERY, STORAGE, AND HANDLING

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, de- bris, 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.

1.7 COORDINATION

A. Coordinate connection to water main with utility company.

B. Coordinate piping materials, sizes, entry locations, and pressure requirements with building water distribution piping.

C. Coordinate with other utility work.

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.

2.2 HIGH DENSITY POLYETHYLENE (HDPE) PIPE

A. Pipe

1. HDPE plastic pipe shall be PE-3408 as defined in ASTM D1248, with a mini- mum 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 equip- ment used in the joining procedures shall be capable of meeting all conditions recommended by the pipe manufacturer, including but not limited to, tempera- ture requirements, alignment, and fusion pressures. Ribbed steel inserts with stainless steel clamps are not approved for HDPE pipe.

5. The HDPE pipe shall be Geo-Flo as manufactured by PW Poly, Hastings, NE, (888) 437-9919 or Cen Fuse Pipe as manufactured by Centennial Plastics LLC, Hastings, NE (866) 851-2227 or approved equal and supplied by Grand Junction Pipe and Supply, Grand Junction, Colorado (970) 243-4604.

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 composi- tions.

4. HDPE elbows, tees and reducers shall be as manufactured by Central Plastics Co., Shawnee, OK, (800) 654-3872 or approved equal, and as supplied by Grand Junction Pipe and Supply, Durango, CO (888) 385-6733.

2.3 PVC, SCHEDULE PIPE

A. PVC, Schedule 40 Pipe:

1. ASTM D 1785.

2. PVC, Schedule 40 Socket Fittings: ASTM D 2466, or as approved by the CO

2.4 COUPLINGS FOR SIMILAR OR DISSIMILAR PIPE

A. Compression type transition fittings for making connections between like and dissimi- lar pipe materials shall be designed to enable a variety of connections between poly- ethylene pipe to various pipes. Fittings shall be Fernco or Field Fabricated or approved equal. Proposed coupling shall be submitted to the CO for written approval

2.5 INSECT SCREEN

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

2.6 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. The stone shall have a specific gravity of at least 2.5. Each piece shall have its greatest dimension not greater than three times its least dimension. Riprap shall be nominal stone size 6” and shall conform to the gradation requirements of CDOT 506.02 6” riprap given in the table below.

Stone Size d50 % of Material Smaller Than Typical Stone Typical Stone Dimensions (Inches) Typical Stone Weight (Pounds)

OR

B. 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. Indi- vidual 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.

2.16 UNDERGROUND DETECTION AND MARKING TAPE

A. WARNING TAPE

1. Warning Tape: Acid- and alkali-resistant polyethylene film warning tape manufactured for marking and identifying underground utilities, 3 inches (75 mm) wide and 4 mils (0.1mm) thick, continuously inscribed with a description of the utility; colored as follows:

2. Detectable Warning Tape: Acid- and alkali-resistant polyethylene film warning tape manufactured for marking and identifying underground utilities, minimum 3 inches (75 mm) 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 (750 mm) deep; colored as follows:

a. Red: Electric.

b. Yellow: Gas, oil, steam, and dangerous materials.

c. Orange: Telephone and other communications

d. Blue: Water systems

e. Green: Sewer systems

2.17 ANCHORAGES

A. Clamps, Straps, and Washers: ASTM A 506, steel.

B. Rods: ASTM A 575, steel.

C. Rod Couplings: ASTM A 197 (ASTM A 197M), malleable iron.

D. Bolts: ASTM A 307, steel.

E. Cast Iron Washers: ASTM A 126, gray iron.

F. Concrete Reaction Backing: Portland cement concrete…