B08_Solicitation_Attach_1_SPEC_.pdf

BLACK CANYON

OF THE

GUNNISON

NATIONAL PARK

Repair Electrical RV Site Hook-ups at South Rim Campground

PMIS NO. 249319

PROJECT SPECIFICATIONS

NATIONAL PARK SERVICE

INTERMOUNTAIN REGION

May 2024

TABLE OF CONTENTS

DIVISION 02 – EXISTING CONDITIONS

024119 Selective Demolition

DIVISION 26 – ELECTRICAL

0260500 Electrical Materials and Methods

DIVISION 31 – EARTHWORK

311000 Site Clearing

312000 Earth Moving 312317 Trenching, Bedding and Backfill for Utilities

313216 Magnesium Chloride

DIVISION 32 – EXTERIOR IMPROVEMENTS

321313 Concrete Paving

BLCA 249319

3 3 2 4 2 24931

024119-1

SELECTIVE DEMOLITION

SECTION 024119 - SELECTIVE DEMOLITION

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Demolition and removal of selected site elements.

2. Salvage of existing items to be reused or recycled.

1.2 MATERIALS OWNERSHIP

A. Unless otherwise indicated, demolition waste becomes property of Contractor.

B. Historic items, relics, antiques, and similar objects including, but not limited to, cornerstones and their contents, commemorative plaques and tablets, and other items of interest or value to

Owner that may be uncovered during demolition remain the property of Owner.

1. Carefully salvage in a manner to prevent damage and promptly return to Owner.

1.3 PREINSTALLATION MEETINGS

A. Predemolition Conference: Conduct conference at Project site.

1.4 INFORMATIONAL SUBMITTALS

A. Proposed Protection Measures: Submit report, including Drawings, that indicates the measures proposed for protecting individuals and property, for environmental protection, for dust control and, for noise control. Indicate proposed locations and construction of barriers.

B. Schedule of selective demolition activities with starting and ending dates for each activity.

C. Predemolition photographs or video.

1.5 CLOSEOUT SUBMITTALS

A. Inventory of items that have been removed and salvaged.

1.6 FIELD CONDITIONS

A. Owner and Park Visitors will occupy portions of area immediately adjacent to selective demolition area. Conduct selective demolition so operations will not be disrupted.

024119-2

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

C. Notify Architect of discrepancies between existing conditions and Drawings before proceeding with selective demolition.

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

Work.

1. If suspected hazardous materials are encountered, do not disturb; immediately notify

Architect and Owner. Hazardous materials will be removed by Owner under a separate contract.

D. Storage or sale of removed items or materials on-site is not permitted.

E. 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.

F. Arrange selective demolition schedule so as not to interfere with Owner's operations.

1.7 WARRANTY

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

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. Regulatory Requirements: Comply with governing EPA notification regulations before beginning selective demolition. Comply with hauling and disposal regulations of authorities having jurisdiction.

B. Standards: Comply with ASSE A10.6 and NFPA 241.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Verify that utilities have been disconnected and capped before starting selective demolition operations.

B. Inventory and record the condition of items to be removed and salvaged.

024119-3

3.2 UTILITY SERVICES AND MECHANICAL/ELECTRICAL SYSTEMS

A. Existing Services/Systems to Remain: Maintain services/systems indicated to remain and protect them against damage.

B. Existing Services/Systems to Be Removed, Relocated, or Abandoned: Locate, identify, disconnect, and seal or cap off utility services and mechanical/electrical systems serving areas to be selectively demolished.

1. Arrange to shut off utilities with utility companies.

2. If services/systems are required to be removed, relocated, or abandoned, provide temporary services/systems that bypass area of selective demolition and that maintain continuity of services/systems to other parts of building.

3.3 PROTECTION

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

B. Temporary Shoring: Design, provide, and maintain shoring, bracing, and structural supports as required to preserve stability and prevent movement, settlement, or collapse of construction and finishes to remain, and to prevent unexpected or uncontrolled movement or collapse of construction being demolished.

C. Remove temporary barricades and protections where hazards no longer exist.

3.4 SELECTIVE DEMOLITION

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

1. Neatly cut openings and holes plumb, square, and true to dimensions required. Use cutting methods least likely to damage construction to remain or adjoining construction.

Use hand tools or small power tools designed for sawing or grinding, not hammering and chopping. Temporarily cover openings to remain.

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

3. Locate selective demolition equipment and remove debris and materials so as not to impose excessive loads on supporting walls, floors, or framing.

4. Dispose of demolished items and materials promptly. Comply with requirements in

Section 010000 "General Requirements."

B. Site Access and Temporary Controls: Conduct selective demolition and debris-removal operations to ensure minimum interference with roads, streets, walks, walkways, and other adjacent occupied and used facilities.

C. Removed and Salvaged Items:

024119-4

1. Clean salvaged items.

2. Pack or crate items after cleaning. Identify contents of containers.

3. Store items in a secure area until delivery to Owner.

4. Transport items to Owner's storage area designated by Owner.

5. Protect items from damage during transport and storage.

D. Removed and Reinstalled Items:

1. Clean and repair items to functional condition adequate for intended reuse.

2. Pack or crate items after cleaning and repairing. Identify contents of containers.

3. Protect items from damage during transport and storage.

4. Reinstall items in locations indicated. Comply with installation requirements for new materials and equipment. Provide connections, supports, and miscellaneous materials necessary to make item functional for use indicated.

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

3.5 CLEANING

A. Remove demolition waste materials from Project site and dispose of them in an EPA-approved construction and demolition waste landfill acceptable to authorities having jurisdiction and recycle or dispose of them according to Section 010000 "General Requirements."

1. Do not allow demolished materials to accumulate on-site.

2. Remove and transport debris in a manner that will prevent spillage on adjacent surfaces and areas.

3. Comply with requirements specified in Section 010000 "General Requirements."

4. Burning: Do not burn demolished materials.

B. Clean adjacent structures and improvements of dust, dirt, and debris caused by selective demolition operations. Return adjacent areas to condition existing before selective demolition operations began.

END OF SECTION 024119

260500 – 1

ELECTRICAL MATERIALS AND METHODS BLCA 249319

SECTION 260500 - ELECTRICAL MATERIALS AND METHODS

A. This Section includes electrical materials for a complete electrical system including the following:

1. Raceways.

2. Building wire and connectors.

3. Grounding.

4. Supporting devices for electrical components.

5. RV pedestals.

6. Circuit breakers.

1.2 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary

Conditions and Division 1 Specifications, apply to Division 26 Sections.

1.3 QUALITY ASSURANCE

A. Worker's Qualifications: All electrical work shall be performed by licensed electricians or under the direct supervision of a licensed electrician licensed in the state of Utah.

B. Codes and Regulations:

1. All work shall meet requirements of governing codes and regulations, NFPA 70-2020

(NEC), and NESC.

2. Comply with the State of Utah requirements for electrical installations.

3. Advise the Contracting Officer of conflicting codes or conflicts between codes drawings, and specifications.

4. When the requirements of specifications or drawings are more stringent than the codes, regulations, or standards, the specifications or drawings shall prevail.

5. The electrical installation shall meet the requirements of NECA Standard of

Installation, except where otherwise specified.

C. UL Listing:

1. All electrical materials and equipment shall meet requirements of the applicable standards of UL if UL standards exist for such materials and equipment.

2. The UL authorized listing mark is acceptable as evidence that the materials meet this requirement.

3. Install materials and equipment only for their intended operational purpose.

D. Standard Products: Provide only new electrical equipment of current standard design.

E. Electrical Components, Devices, and Accessories: Listed and labeled under UL 467 as defined in NFPA 70.

260500 – 2

F. UL Compliance: Applicable requirements of UL Standards Nos. 467, “Electrical Grounding and Bonding Equipment,” and 869, “Electrical Service Equipment,” pertaining to grounding and bonding of systems, circuits, and equipment. In addition, compliance with UL Standard

486A, “Wire Connectors.”

G. IEEE Compliance: Applicable requirements and recommended installation practices of IEEE

Standards pertaining to grounding and bonding of systems, circuits, and equipment.

1.4 INTENT OF CONSTRUCTION DRAWINGS

A. Electrical drawings do not attempt to show complete details of construction that affect installation. Diagrams are schematic only and do not necessarily show physical arrangement of equipment. Refer to drawings of other trades for additional details that affect work.

B. Conduit, conductor and ground connections are shown diagrammatically only. Layout does not necessarily show total number of conduits or conductors for circuits required and should not be used for obtaining quantities for linear runs of conduits or wires. Provide additional conduits and wire wherever needed to complete installation of specific equipment furnished.

C. Locations of electrical devices on drawings are approximate and may be distorted for clarity in representation.

D. Changes such as offsetting conduit runs, moving outlets, or other minor changes necessary to facilitate installation shall be made at no additional expense to the Government.

1.5 SUBMITTALS

A. As specified in Division 01 Section, “General Requirements” Submittals.

1. Product Submittals: Submit manufacturer’s product literature for the following items:

a. Conduit, raceways, and fittings.

b. Wire and cable.

c. Ground rods.

d. RV pedestals.

e. Circuit Breakers.

PART 2 – PRODUCTS

2.1 RACEWAYS

A. Metal Conduit:

1. RMC: UL 6 rigid metal conduit; hot dipped galvanized rigid steel; ANSI C80.1 with threaded fittings.

2. Fittings and Conduit Bodies: ANSI/NEMA FB 1; material to match conduit.

B. RNC: Rigid nonmetallic conduit; NEMA TC 2, Schedule 80 PVC. UL-listed for exposure to sunlight where utilized above ground.

260500 – 3

1. Fittings and Conduit Bodies: NEMA TC 3.

C. Bushings: Insulated type bushings designed to prevent abrasion of wires without impairing the continuity of the conduit grounding system comprised of rigid steel conduit. Provide lock-ing type grounding bushings with a feed-through compression lug.

D. Expansion Fittings: Rigid hot-dipped galvanized steel or malleable iron with factory-installed packing and grounding ring.

1. Rigid non-metallic conduit expansion fittings: Provide short type for runs 25 feet or less and long type in runs 26 to 80 feet.

a. Short Type: On-piece coupling with O ring providing 2 inches of total move-ment range in 1/2-inch to 2-inch conduit sizes.

b. Long Type: Two-piece barrel and piston joint providing 6 inches of total move-ment range in 1/2-inch to 6-inch conduit sizes.

E. Sealing Fittings: Threaded, zinc or cadmium coated, cast or malleable iron type for steel con-duits. Provide continuous drain type when fittings are used to prevent passage of water vapor.

2.2 WIRE AND CABLE

A. Feeders and Branch Circuits: Copper, stranded conductor, 600-volt insulation, Type THHN/THWN or URD depending on application.

2.3 GROUNDING

A. Grounding Electrode Conductors: Stranded copper cable, without splice throughout its length;

bare or green insulated wire is acceptable.

B. Equipment Grounding Conductors: Copper, insulated with green-colored insulation. Use same type as other wires in the circuit.

C. Ground Rods: One piece, copper or copper-clad steel rod, 3/4 inches by 96 inches.

D. Underground Conductors: Bare, tinned, stranded, unless otherwise indicated.

E. Bonding Jumpers: Bare copper tape or tinned-copper tape, braided copper conductors, terminated with copper ferrules.

F. Ground Bus: Bare, annealed copper bars of rectangular cross section with insulated spacer.

G. Connectors: Comply with IEEE 837 and UL 467; listed for use for specific types, sizes, and combinations of conductors and connected items.

1. Exothermic-Welded Type: Kit form selected per manufacturer’s written instructions.

2.4 SUPPORTING DEVICES

A. Material: Cold-formed steel, with corrosion-resistant coating.

B. Metal Items for Use Outdoors or in Damp Locations: Hot-dip galvanized steel.

260500 – 4

2.5 RV PEDESTAL

A. Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to the manufacturers speci-fied:

1. Midwest Electric Products, Inc.

2. Square D.

B. General: UL-listed, 16 gauge galvanized zinc coated, steel pedestal consisting of post, circuit breakers, power outlets, welded flange and surface mounting base plate. NEMA 3R construc-tion, suitable for underground services. Terminals rated for copper or aluminum wire. All surfaces powder coated gray finish. Tamper proof seals. 120/240 volt single phase, 120 Amp.

C. Post: Factory wired from loop-feed lugs and twin 2-250 MCM terminals per phase, suitable for Cu/Al. Provide with surface mounted bracket.

Power Outlets: Commercial quality 50/30/20 amp receptacles with 20 amp GFI outlet.

2.6 OUTLET, PULL, AND JUNCTION BOXES

A. Outdoor and Wet Locations: Weatherproof, cast metal, threaded hub.

B. Buried or Subject to Constant Moisture: Watertight.

2.7 DEVICE PLATES AND COVERS

A. Single and combination types to match corresponding wiring devices.

1. Plate-Securing Screws: Metal with head color to match plate finish.

2. Material for Wet Locations: Listed and labeled for use in “wet locations,” gasketed and weatherproof, with cast aluminum cover plates for junction boxes.

2.8 CIRCUIT BREAKERS

A. Molded-Case Circuit Breaker: NEMA AB 1, with interrupting capacity to meet available fault currents. Inverse time-current element for low-level overloads, and instantaneous magnetic trip element for short circuits. Heavy-duty, bolt-on, quick make, quick break type. Minimum interrupting rating of 10,000 amperes symmetrical at 240 volts, unless otherwise noted on drawings.

1. Multiple Pole Circuit Breakers: Thermal-magnetic type with common type handle.

Minimum 100-ampere frame and through 100-ampere trip sizes shall take up same pole spacing.

2. Application Listing: Appropriate for application.

2.9 ELECTRICAL IDENTIFICATION

A. Identification Device Colors: Use those prescribed by ANSI A13.1, NFPA 70, and these

Specifications.

260500 – 5

B. Colored Adhesive Marking Tape for Raceways, Wires, and Cables: Self-adhesive vinyl tape, not less than 1 inch wide by 3 mils thick.

C. Tape Markers for Conductors: Vinyl or vinyl-cloth, self-adhesive, wraparound type with preprinted numbers and letters.

D. Color-Coding Cable Ties: Type 6/6 nylon, self-locking type. Colors to suit coding scheme.

PART 3 – EXECUTION

A. Field verify circuiting arrangements and all existing conditions prior to beginning work.

Report discrepancies to Contracting Officer before disturbing existing installation.

3.2

UNDERGROUNG POWER INSTALLATION

A. Excavating, trenching, backfilling, and warning tape: Comply with Division 31 section, “Trenching, Bedding, and Backfill for Utilities.”

3.3

ELECTRICAL EQUIPMENT INSTALLATION

A. Materials and Components: Install level, plumb, and parallel and perpendicular to other building systems and components, unless otherwise indicated.

B. Equipment: Install to facilitate service, maintenance, and repair or replacement of components. Connect for ease of disconnecting, with minimum interference with other installations.

3.4

RACEWAY APPLICATION

A. Underground Installations: Schedule 80 RNC.

B. Wet and Damp Locations: RMC.

C. Outdoor Locations, Above Grade: RMC or Schedule 80 RNC.

3.5

RACEWAY INSTALLATION

A. Install raceways in accordance with NECA “Standard of Installation” and manufacturer’s recommendations.

B. Run raceway plumb, level, and in a direct line, with long sweeping bends and offsets. Make changes in direction of raceway with symmetrical bends or metal fittings.

C. Keep legs of raceway bends in the same plane and keep straight legs of offsets parallel.

D. Use conduit hubs or sealing locknuts to fasten conduit to sheet metal boxes and cast boxes in damp and wet locations.

260500 – 6

E. Install no more than equivalent of four 90-degree bends between boxes. Use conduit bodies to make sharp changes in direction.

F. Underground Conduit:

1. Install minimum depth to top of underground conduit in accordance with NEC unless otherwise indicated.

2. Install underground conduit with watertight joints.

3.6 WIRE AND CABLE METHODS

A. Conductor Size: Meet requirements of NFPA 70 or the sizes shown on the drawings if larger.

B. Wire and Cable Application: Use wiring and cabling methods specified below to the extent permitted by applicable codes.

1. Exterior Locations: Wire in raceways.

3.7 WIRE AND CABLE INSTALLATION

A. Taps and Splices:

1. Permitted only in junction or outlet boxes.

2. Make splices and taps that are compatible with conductor material and that possess equivalent or better mechanical strength and insulation ratings than unspliced conductors.

B. Place an equal number of conductors for each phase of a circuit in same raceway or cable.

Pull all conductors into a raceway at the same time.

C. Cable Installation:

1. Do not use cable as flexible connection to motors or other vibrating equipment.

2. Run concealed cable parallel and perpendicular to building elements at right angles.

Run parallel cable runs together. Run high and tight to structure.

3. Support cable every four feet and within 12 inches of every outlet box, junction box, cabinet, of fitting.

3.8 GROUNDING

A. Size and install grounding system and grounding electrode conductors in accordance with

NEC.

B. Make exothermic welded connections where grounding conductors connect to underground grounding conductors and to underground grounding electrodes, and for bonding to steel. Ex-othermic weld all underground connections.

C. Provide a corrosion-resistant finish to field connections, buried metallic bonding products, and where factory applied protective coatings have been destroyed, where subject to corrosive ac-tion.

260500 – 7

D. Route grounding connections, conductors to ground, and grounding conductors to protective devices in the shortest and straightest paths possible to minimize transient voltage rises.

E. Install equipment-grounding conductor in feeder and branch circuits. Route to equipment, and panels. Ground as required by NEC. Terminate each ground conductor to the bushing and ground lug.

F. Install an equipment-grounding conductor in non-metallic and flexible metallic conduits.

G. Connections: Make connections so galvanic action or electrolysis possibility is minimized.

Select connectors, connection hardware, conductors, and connection methods so metals in direct contact are galvanically compatible.

1. Equipment Grounding Conductor Terminations:

a. No. 8 AWG and larger: Use pressure-type, such as setscrew or hydraulic compression, grounding lugs.

b. No. 10 AWG and smaller: Terminate with winged pressure-type connectors.

2. Non-contact Metal Raceway Terminations: If metallic raceways terminate at metal housings without mechanical and electrical connection to housing, terminate each conduit with a grounding bushing. Connect grounding bushings with a bare grounding conductor to grounding bus or terminal in housing. Bond electrically non-continuous conduits at entrances and exits with grounding bushings and bare grounding conductors, unless otherwise indicated.

3. Tighten screws and bolts for grounding and bonding connectors and terminals according to manufacturer’s published torque-tightening values. Use values specified in UL 486A if manufacturer’s torque values are not indicated.

4. Moisture Protection: If insulated grounding conductors are connected to ground rods or grounding buses, insulate entire area of connection and seal against moisture penetration of insulation and cable.

3.9 ELECTRICAL SUPPORTING DEVICE APPLICATION

A. Damp Locations and Outdoors: Use hot-dip galvanized materials or nonmetallic, slotted channel system components.

B. Strength of Supports: Adequate to carry present and future loads, times a safety factor of at least four with, 200-lb minimum design load for each support element.

C. Clean cuts and welds. Coat unpainted surfaces with cold application zinc galvanizing. Coat cuts and welds on painted surfaces with zinc chromate primer and finish to match existing paint.

3.10 SUPPORT INSTALLATION

A. Support raceways with clamps.

B. Do not support conduit with wire or perforated pipe straps.

260500 – 8

C. Secure electrical items and their supports to building structure, using the following methods unless other fastening methods are indicated:

1. Wood: Wood screws or screw-type nails.

2. Fasteners for Damp, Wet, or Weather-Exposed Locations: Stainless steel.

3. Fasteners: Select so load applied to each fastener does not exceed 25 percent of its proof-test load.

3.11 IDENTIFICATION MATERIALS AND DEVICES

A. Install at locations for most convenient viewing without interference with operation and maintenance of equipment.

B. Coordinate names, abbreviations, colors, and other designations used for electrical identification with corresponding designations indicated in the Contract Documents or required by codes and standards. Use consistent designations throughout Project.

C. Self-Adhesive Identification Products: Clean surfaces before applying.

D. Nameplates: Identify panels, motor starters, control points, and disconnect switches.

E. Wire Markers: Install at each end of each wire interconnecting between such items as control panels, sensors, and control devices. Wire markers shall correspond to control wire numbers on schematic diagrams.

3.12 CIRCUIT BREAKERS

A. Field verify panel prior to ordering circuit breakers.

B. Install filler plates in unused protective device spaces.

C. Label panel directory with circuit number and equipment served.

3.13 FIELD QUALITY CONTROL

A. Notify Contracting Officer at least 48 hours before inspection or testing. Perform tests in the presence of the Contracting Officer.

B. Inspections and Testing: After installing circuit breakers and after electrical circuits have been energized, demonstrate product capability and compliance with requirements. Make internal and external inspections and perform tests, including the following:

1. Inspect for freedom from physical damage, proper unit rating, mechanical condition, enclosure integrity, cover operation, unit anchorage, clearances, and tightness of electrical connections. If a loose electrical connection is observed on any unit, check each electrical connection for each switch and circuit breaker with a torque wrench for compliance with manufacturer's torquing instructions.

2. Inspect Circuit Breakers for proper frame, trip, and fault current interrupting rating.

3. Inspect wiring, components, connections and equipment installation.

4. Test continuity of each circuit.

260500 – 9

C. Correct defective and malfunctioning units on-site, where possible, and re-inspect and retest to demonstrate compliance; otherwise, remove and replace with new units and retest.

D. Prepare test and inspection reports. Include notation of deficiencies detected, remedial action taken, and observations after remedial action.

END OF SECTION 260500

311000-1

SITE CLEARING

SECTION 311000 - SITE CLEARING

1. Protecting existing vegetation to remain.

2. Removing existing vegetation.

3. Clearing and grubbing.

4. Stripping and stockpiling topsoil.

5. Removing above- and below-grade site improvements.

6. Disconnecting, capping, or sealing site utilities.

7. Temporary erosion and sedimentation control.

1.2 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct conference at Project site

1.3 MATERIAL OWNERSHIP

A. Except for materials indicated to be stockpiled or otherwise remain Owner's property, cleared materials shall become Contractor's property and shall be removed from Project site.

1.4 FIELD CONDITIONS

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

1. Do not close or obstruct streets, walks, or other adjacent occupied or used facilities without permission from Owner and authorities having jurisdiction.

2. Provide alternate routes around closed or obstructed trafficways if required by Owner or authorities having jurisdiction.

B. Utility Locator Service: Notify utility locator service for area where Project is located before site clearing.

C. Do not commence site clearing operations until temporary erosion- and sedimentation-control and plant-protection measures are in place.

D. Tree- and Plant-Protection Zones: Protect according to requirements in Section 010000

"General Requirements”.

311000-2

2.1 MATERIALS

A. Satisfactory Soil Material: Requirements for satisfactory soil material are specified in Section

312000 "Earth Moving."

1. Obtain approved borrow soil material off-site when satisfactory soil material is not available on-site.

3.1 PREPARATION

A. Protect and maintain benchmarks and survey control points from disturbance during construction.

B. Verify that trees, shrubs, and other vegetation to remain or to be relocated have been flagged and that protection zones have been identified and enclosed according to requirements in

Section 010000 "General Requirements”.

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

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

3.2 TEMPORARY EROSION AND SEDIMENTATION CONTROL

A. Provide temporary erosion- and sedimentation-control measures to prevent soil erosion and discharge of soil-bearing water runoff or airborne dust to adjacent properties and walkways, according to requirements specified in Section 010000 "General Requirements”.

B. Verify that flows of water redirected from construction areas or generated by construction activity do not enter or cross protection zones.

C. Inspect, maintain, and repair erosion- and sedimentation-control measures during construction until permanent vegetation has been established.

D. Remove erosion and sedimentation controls and restore and stabilize areas disturbed during removal.

3.3 TREE AND PLANT PROTECTION

A. Protect trees and plants remaining on-site according to requirements in Section 010000

"General Requirements”.

311000-3

B. Repair or replace trees, shrubs, and other vegetation indicated to remain or be relocated that are damaged by construction operations according to requirements in Section 010000 "General

Requirements”.

3.4 EXISTING UTILITIES

A. Locate, identify, disconnect, and seal or cap utilities indicated to be removed or abandoned in place.

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

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

1. Notify Architect not less than two days in advance of proposed utility interruptions.

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

3.5 CLEARING AND GRUBBING

C. Remove obstructions, shrubs, and other vegetation to permit installation of new construction.

1. Grind down stumps and remove roots larger than 3 inches in diameter, obstructions, and debris to a depth of 18 inches below exposed subgrade.

2. Use only hand methods or air spade for grubbing within protection zones.

D. Fill depressions caused by clearing and grubbing operations with satisfactory soil material unless further excavation or earthwork is indicated.

1. Place fill material in horizontal layers not exceeding a loose depth of 8 inches 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 depth of 6 inches in a manner to prevent intermingling with underlying subsoil or other waste materials.

C. Stockpile topsoil away from edge of excavations without intermixing with subsoil or other materials. Grade and shape stockpiles to drain surface water. Cover to prevent windblown dust and erosion by water.

3.6 SITE IMPROVEMENTS

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

311000-4

3.7 DISPOSAL OF SURPLUS AND WASTE MATERIALS

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

B. Separate recyclable materials produced during site clearing from other nonrecyclable materials.

Store or stockpile without intermixing with other materials and transport them to recycling facilities. Do not interfere with other Project work.

END OF SECTION 311000

312000 - 1

EARTH MOVING

SECTION 312000 - EARTH MOVING

1.1 RELATED DOCUMENTS

A. The work of this section consists of site excavation and grading and earthwork not included in

Section 312317 Trenching, Bedding and Backfill for Utilities.

1.2 SUMMARY

1. Excavating and filling for rough grading the Site.

2. Preparing subgrades for concrete paving on grade and crusher fines trail.

3. Drainage course for concrete slabs-on-grade.

4. Subbase course for concrete pavements.

5. Bedding course for culverts.

1.3 DEFINITIONS

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

1. Initial Backfill: Backfill placed beside and over pipe in a trench, including haunches to support sides of pipe.

2. Final Backfill: Backfill placed over initial backfill to fill a trench.

B. Base Course: Aggregate layer placed between the subbase course and paving or crushed fines trail surface.

C. Bedding Course: Aggregate layer placed over the excavated subgrade in a trench before laying culvert pipe.

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

E. Drainage Course: Aggregate layer supporting the slab-on-grade that also minimizes upward capillary flow of pore water.

F. Excavation: Removal of material encountered above subgrade elevations and to lines and dimensions indicated.

1. Authorized Additional Excavation: Excavation below subgrade elevations or beyond indicated lines and dimensions as directed by Architect. Authorized additional excavation and replacement material will be paid for according to Contract provisions for changes in the Work.

312000 - 2

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

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

H. Structures: Buildings, footings, foundations, retaining walls, slabs, tanks, curbs, mechanical and electrical appurtenances, or other man-made stationary features constructed above or below the ground surface.

I. Subbase Course: Aggregate layer placed between the subgrade and a cement concrete pavement or a cement concrete walk.

J. Subgrade: Uppermost surface of an excavation or the top surface of a fill or backfill immediately below subbase, drainage fill, drainage course, or topsoil materials.

K. Utilities: On-site underground pipes, conduits, ducts, and cables as well as underground services within buildings.

1.4 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct pre-excavation conference at Project site.

1.5 SUBMITTALS

A. Material test reports.

B. Material sample of all rock materials representative of color and size to be used on project.

1.6 FIELD CONDITIONS

A. Utility Locator Service: Notify utility locator service for area where Project is located before beginning earth-moving operations.

B. Do not commence earth-moving operations until plant-protection measures specified in

Section 010000 “General Requirements” are in place.

2.1 SOIL MATERIALS

A. General: Provide borrow soil materials when sufficient satisfactory soil materials are not available from excavations.

B. Satisfactory Soils: Soil Classification Groups A-1, A-2-4, A-2-5, and A-3 according to

AASHTO M 145, or a combination of these groups; free of rock or gravel larger than 3 inches

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(75 mm) in any dimension, debris, waste, frozen materials, vegetation, and other deleterious matter.

C. Unsatisfactory Soils: Soil Classification Groups A-2-6, A-2-7, A-4, A-5, A-6, and A-7 according to AASHTO M 145, or a combination of these groups.

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

D. Subbase Material: Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand; ASTM D2940/D2940M; with at least 90 percent passing a 1-

1/2-inch (37.5-mm) sieve and not more than 12 percent passing a No. 200 (0.075-mm) sieve.

E. Base Course: Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand; ASTM D2940/D2940M; ASTM grading size 57 with at least

95 percent passing a 3/4-inch (.19-mm) sieve and not more than 8 percent passing a No. 200

(0.075-mm) sieve. (Class 2 Aggregate base)

F. Bedding Course: Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand; ASTM D2940/D2940M; except with 100 percent passing a

1-inch (25-mm) sieve and not more than 8 percent passing a No. 200 (0.075-mm) sieve.

G. Drainage Course: Narrowly graded mixture of washed crushed stone, or crushed or uncrushed gravel; ASTM D448; coarse-aggregate grading ASTM Size 7; with 100 percent passing a 3/4-inch (.19-mm) sieve and zero to 5 percent passing a No. 8 (2.36-mm) sieve.

H. Rip Rap: Well graded dense angular stone resistant to weathering conforming to UDOT specifications for the size(s) indicated. Use colors to match native soil color.

2.2 ACCESSORIES

A. Detectable Warning Tape: Acid- and alkali-resistant, polyethylene film warning tape manufactured for marking and identifying underground utilities, a minimum of 3 inches wide and 4 mils thick, continuously inscribed with a description of the utility, with metallic core encased in a protective jacket for corrosion protection, detectable by metal detector when tape is buried up to 30 inches deep; colored to comply with local practice or requirements of authorities having jurisdiction.

A. Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by earth-moving

B. Protect and maintain erosion and sedimentation controls during earth-moving operations.

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C. Protect subgrades and foundation soils from freezing temperatures and frost. Remove temporary protection before placing subsequent materials.

3.2 EXCAVATION, GENERAL

A. Unclassified Excavation: Excavate to subgrade elevations regardless of the character of surface and subsurface conditions encountered. Unclassified excavated materials may include rock, soil materials, and obstructions. No changes in the Contract Sum or the Contract Time will be authorized for rock excavation or removal of obstructions.

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

3.3 EXCAVATION FOR WALKS AND PAVEMENTS

A. Excavate surfaces under walks and pavements to indicated lines, cross sections, elevations, and subgrades.

B. Trenches in Tree- and Plant-Protection Zones:

1. Hand-excavate to indicated lines, cross sections, elevations, and subgrades. Use narrow-tine spading forks to comb soil and expose roots. Do not break, tear, or chop exposed roots. Do not use mechanical equipment that rips, tears, or pulls roots.

2. Do not cut main lateral roots or taproots; cut only smaller roots that interfere with installation of utilities.

3. Cut and protect roots according to requirements in Section 010000 "General

Requirements".

3.4 SUBGRADE INSPECTION

A. Compact subgrade below slabs, walkways and pavements with a vibratory plate to identify soft pockets and areas of excess yielding. Do not compact wet or saturated subgrades.

B. Reconstruct subgrades damaged by freezing temperatures, frost, rain, accumulated water, or construction activities, as directed by Architect, without additional compensation.

3.5 UNAUTHORIZED EXCAVATION

A. Fill unauthorized excavation under foundations or wall footings by extending bottom elevation of concrete foundation or footing to excavation bottom, without altering top elevation. Lean concrete fill, with 28-day compressive strength of 2500 psi (17.2 MPa), may be used when approved by Architect.

1. Fill unauthorized excavations under other construction, pipe, or conduit as directed by

Architect.

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3.6 STORAGE OF SOIL MATERIALS

A. Stockpile borrow soil materials and excavated satisfactory soil materials without intermixing.

Place, grade, and shape stockpiles to drain surface water. Cover to prevent windblown dust or water runoff during a rain event.

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

3.7 SOIL FILL

A. Plow, scarify, bench, or break up sloped surfaces steeper than 1 vertical to 4 horizontal so fill material will bond with existing material.

B. Place and compact fill material in layers to required elevations as follows:

1. Under grass and planted areas, use satisfactory soil material.

2. Under walks and pavements, use satisfactory soil material.

C. Place soil full on subgrades free of mud, frost or ice.

3.8 SOIL MOISTURE CONTROL

A. Uniformly moisten or aerate subgrade and each subsequent fill or backfill soil layer before compaction to within 2 percent of optimum moisture content.

1. Do not place backfill or fill soil material on surfaces that are muddy, frozen, or contain frost or ice.

2. Remove and replace, or scarify and air dry, otherwise satisfactory soil material that exceeds optimum moisture content by 2 percent and is too wet to compact to specified dry unit weight.

3.9 COMPACTION OF SOIL BACKFILLS AND FILLS

A. Place backfill and fill soil materials in layers not more than n 4 inches (100 mm) in loose depth for material compacted by hand-operated tampers.

B. Place backfill and fill soil materials evenly on all sides of structures to required elevations and uniformly along the full length of each structure.

C. Compact soil materials to not less than the following percentages of maximum dry unit weight according to ASTM D698, ASTM D1557:

1. Under structures, building slabs, steps, and pavements, scarify and recompact top 12 inches (300 mm) of existing subgrade and each layer of backfill or fill soil material at 95 percent.

2. Under walkways and trail scarify and recompact top 6 inches (150 mm) below subgrade and compact each layer of backfill or fill soil material at 95 percent.

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3. Under turf or unpaved areas, scarify and recompact top 6 inches (150 mm) below subgrade and compact each layer of backfill or fill soil material at 85 percent.

3.10 GRADING

A. General: Uniformly grade areas to a smooth surface, free of irregular surface changes. Comply with compaction requirements and grade to cross sections, lines, and elevations indicated.

B. Site Rough Grading: Slope grades to direct water away from buildings and to prevent ponding.

Finish subgrades to elevations required to achieve indicated finish elevations, within the following subgrade tolerances:

1. Turf or Unpaved Areas: Plus or minus 1 inch (25 mm).

2. Walks: Plus or minus 1 inch (25 mm).

3. Pavements: Plus or minus 1/2 inch (13 mm).

4. Accessible surfaces: ¼” max

C. Grading inside Building Lines: Finish subgrade to a tolerance of 1/2 inch (13 mm) when tested with a 10-foot (3-m) straightedge.

3.11 SUBBASE AND BASE COURSES UNDER PAVEMENTS, WALKS AND CRUSHED

FINES TRAIL

A. Place subbase course and base course on subgrades free of mud, frost, snow, or ice.

B. On prepared subgrade, place subbase course and base course under pavements, walks as follows:

1. Shape subbase course and base course to required crown elevations and cross-slope grades.

2. Place subbase course and base course that exceeds 6 inches (150 mm) in compacted thickness in layers of equal thickness, with no compacted layer more than 6 inches (150

mm) thick or less than 3 inches (75 mm) thick.

3. Compact subbase course and base course at optimum moisture content to required grades, lines, cross sections, and thickness to not less than 95 percent of maximum dry unit weight according to ASTM D698, ASTM D1557.

3.12 DRAINAGE COURSE UNDER CONCRETE SLABS-ON-GRADE

A. Place drainage course on subgrades free of mud, frost, snow, or ice.

B. On prepared subgrade, place and compact drainage course under cast-in-place concrete slabs-on-grade as follows:

1. Place drainage course that exceeds 6 inches (150 mm) in compacted thickness in layers of equal thickness, with no compacted layer more than 6 inches (150 mm) thick or less than

3 inches (75 mm) thick.

2. Compact each layer of drainage course to required cross sections and thicknesses to not less than 95 percent of maximum dry unit weight according to ASTM D698.

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3.13 FIELD QUALITY CONTROL

A. Special Inspections: Contractor will engage a qualified special inspector to perform inspections:

B. Testing Agency: Contractor will engage a qualified geotechnical engineering testing agency to perform tests and inspections.

C. Allow testing agency to inspect and test subgrades and each fill or backfill layer. Proceed with subsequent earth moving only after test results for previously completed work comply with requirements.

D. Footing Subgrade: At footing subgrades, at least one test of each soil stratum will be performed to verify design bearing capacities. Subsequent verification and approval of other footing subgrades may be based on a visual comparison of subgrade with tested subgrade when approved by Architect.

E. When testing agency reports that subgrades, fills, or backfills have not achieved degree of compaction specified, scarify and moisten or aerate, or remove and replace soil materials to depth required; recompact and retest until specified compaction is obtained.

3.14 PROTECTION

A. Protecting Graded Areas: Protect newly graded areas from traffic, freezing, and erosion. Keep free of trash and debris.

B. Repair and reestablish grades to specified tolerances where completed or partially completed surfaces become eroded, rutted, settled, or where they lose compaction due to subsequent construction operations or weather conditions.

C. Where settling occurs before Project correction period elapses, remove finished surfacing, backfill with additional soil material, compact, and reconstruct surfacing.

1. Restore appearance, quality, and condition of finished surfacing to match adjacent work, and eliminate evidence of restoration to greatest extent possible.

3.15 DISPOSAL OF SURPLUS AND WASTE MATERIALS

A. Remove surplus satisfactory soil and waste materials, including unsatisfactory soil, trash, and debris, and legally dispose of them off Owner's property.

END OF SECTION 312000

312317 – 1

TRENCHING, BEDDING AND BACKFILL FOR UTILITIES BLCA 249319

SECTION 312317 - TRENCHING, BEDDING AND BACKFILL FOR UTILITIES

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

1.2 QUALITY ASSURANCE

A. Conduct compaction tests as necessary to monitor the installation procedure and assure the quality of the work.

B. Perform all trench excavation in accordance with minimum requirements of OSHA

Regulations. Provide shoring, bracing and tight sheeting to prevent caving and to protect workers in accordance with OSHA requirements and to protect adjacent property and structures.

C. Direct dewatering operations to natural drainages or storm sewers as appropriate. Perform discharge from dewatering operations in accordance with rules and regulations established by the Utah Department of Public Health and Environment.

1.3 SUBMITTALS

A. As specified in Division 1 Section, “General Requirements” Submittals.

1. Submit the source of bedding and backfill materials and certified sieve analysis.

2. Product Data: Provide manufacturer’s literature for the following:

a. Warning tape.

1.4 PROJECT CONDITIONS

A. The type, size and location of known underground utilities have been shown on the drawings;

however, no guarantee is made as to the true location of such utilities.

B. Verify the existence and location of all underground utilities at the project site. Notify ‘One-

Call’ at 811 at least three business days prior to any excavation work so local utility companies can locate their lines.

1.5 DEFINITIONS

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

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

1. Initial Backfill: Backfill placed beside and over pipe in a trench, including haunches to support sides of pipe.

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2. Subsequent Backfill: Backfill placed over initial backfill to fill a trench.

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

D. Unclassified excavation: Excavation and disposal of all material encountered in the work, including excavation obtained from borrow source.

E. Rock excavation: Removal and disposal of igneous, metamorphic, and sedimentary rock which cannot be excavated without blasting or using rippers, and all boulders or other detached stones each having a volume of one-half cubic yard or more.

F. Muck excavation: Removal and disposal of saturated organic mixtures of soils or organic matter which requires additional work or equipment which would not normally be required for unclassified excavation.

2.1 BEDDING

A. Mixture of natural or crushed gravel, crushed stone, and natural or crushed sand, ASTM D

2940, except with 100 percent passing a ½- inch sieve and not more than 8 percent passing a

No. 200 sieve. On site materials may not be used.

2.2

BACKFILL AND FILL

A. Initial Backfill: Mixture of natural or crushed gravel, crushed stone, and natural or crushed sand, ASTM D 2940, except with 100 percent passing a ½- inch sieve and not more than 8 percent passing a No. 200 sieve. On site materials may not be used.

B. Subsequent Backfill: Excavated material or borrow material, free from rock larger than 6 inches in the greatest dimension, frozen material, clods, debris, or organic material.

2.3

WARNING TAPE

A. Detectable Warning Tape: Acid- and alkali-resistant polyethylene film warning tape manufactured for marking and identifying underground utilities, minimum 3 inches wide and

4 mils (0.1 mm) thick, continuously inscribed with a description of utility, with metallic core encased in a protective jacket for corrosion protection, detectable by metal detector when tape is buried up to 30 inches deep, colored as follows:

1. Red: Electric.

3.1 ALIGNMENT AND GRADE

A. Stake out and establish grades for the location of pipelines and utility structures. Obtain

Contracting Officer approval before starting excavation.

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3.2 PREPARATION

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

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

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

3.3 DEWATERING

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

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

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

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

3.4 EXPLOSIVES

A. Do not use explosives.

3.5…