Attachment_A_-_Specifications.pdf

3433 Oakwood Hills Parkway Eau Claire, WI 54701‐7698

715.834.3161 • Fax: 715.831.7500 www.AyresAssociates.com

Ayres Associates Project No.26‐1078.00

SPECIFICATIONS

FOR

WAUPEE DAM REPAIRS

USDA FOREST SERVICE ‐ (R9) REGION NINE

CHEQUAMEGON‐NICOLET NATIONAL FOREST

OCONTO COUNTY, WISCONSIN

MAY 15, 2019

WAUPEE DAM REPAIRS

USDA FOREST SERVICE - (R9) REGION NINE

CHEQUAMEGON-NICOLET NATIONAL FOREST

OCONTO COUNTY, WISCONSIN

TABLE OF CONTENTS

Title No. of Pages

Title Page Table of Contents

SPECIFICATIONS

DIVISION 01 - GENERAL REQUIREMENTS

01 01 00 General Requirements 01 57 19 Temporary Environmental Controls 01 57 60 Construction Dewatering

DIVISION 02 – EXISTING CONDITIONS

02 41 00 Demolition

DIVISION 03 – CONCRETE

03 30 00 Cast-in-Place Concrete

DIVISION 05 – METALS

05 50 00 Metal Fabrications 05 53 04 Steel Gratings

DIVISION 31 - EARTHWORK

31 05 10 Site Preparation 31 20 00 Earth Moving 31 37 00 Riprap 31 41 22 Steel Sheet Piling

DIVISION 32 - EXTERIOR IMPROVEMENTS

32 92 00 Turf and Grasses

DIVISION 33 – UTILITIES

33 41 66 Filter Diaphragm 33 42 12 Drainage Piping

DIVISION 35 – WATERWAY AND MARINE CONSTRUCTION

35 20 82 Timber Stop Logs

APPENDICES

A Permits B WDNR Technical Standards C Amphibian and Reptile Exclusion Fencing Protocols

Specifications

01 01 00-1

SECTION 01 01 00

GENERAL REQUIREMENTS

1.01 PROJECT DESCRIPTION

A. In general, the project consists of:

1. Removal and replacement of drop inlet structure and wingwalls.

2. Removal and replacement of concrete pipe and apron.

3. Repair of the auxiliary spillway.

1.02 WORK SEQUENCE

A. The work shall be performed in accordance with general sequence or phasing outlined below. Contractor shall be responsible of the specific sequence of work within this general outline.

1. Repair of auxiliary spillway.

2. Installation of temporary cofferdam and bypass pump.

3. Removal of existing drop inlet structure and concrete pipe.

4. Installation of new drop inlet structure and concrete pipe.

B. If any Heritage site is discovered during work, stop and contact the Forest Archeologist. No work in that area will resume until the Forest Archeologist has cleared the area.

1.03 PROJECT MEETINGS

A. A preconstruction conference will be scheduled after award of contract and prior to beginning work. This meeting shall be attended by CO, Owner, and an authorized representative of Contractor.

B. Periodic progress meetings will be held at project site at times designated by Owner or CO.

A responsible representative of Contractor who can bind Contractor to decisions shall attend.

1.04 WORK HOURS

A. Work shall be conducted between the hours of 7:00 a.m. to 6:00 p.m. on normal work days, unless approved for unusual circumstances.

B. Give written notice to CO whenever it is desired to perform work at night, or on a Saturday, Sunday, or holiday, or to vary period of hours during which work is carried on each day. If approved, such work shall be subject to requirements furnished in writing by CO, and no extra compensation will be allowed.

1.05 SUBMITTALS

A. Submit items for review as listed below and as indicated in individual specification sections.

Unless otherwise indicated, submit the following quantities for each type of submittal:

1. Construction Schedule: PDF electronic file or 2 paper copies.

2. Schedule of Values (if required): PDF electronic file or 2 paper copies.

01 01 00‐2

3. Shop Drawings: PDF electronic file or minimum 3 paper copies (2 retained, 1 returned).

4. Product Data: PDF electronic file or minimum 3 paper copies (2 retained, 1 returned).

5. Certificates of Compliance: PDF electronic file or 2 paper copies.

6. Permits and Approvals: PDF electronic file or 1 paper copy.

7. Test Reports: PDF electronic file or 2 paper copies.

8. Operation and Maintenance (O/M) Manuals: PDF electronic file and 2 paper copies.

9. Warranties: PDF electronic file or 2 paper copies.

B. Shop drawing and product data submittals shall bear the stamp of approval of Contractor as evidence of accuracy, compatibility, and conformance with contract requirements.

Drawings and product data not so stamped will be returned without being examined.

Where manufacturer's standard literature includes multiple products or options, identify the specific products and options as required for this project. Specific written notice shall be given of each variation that shop drawings and product data may have from requirements of the Contract Documents.

C. Products subject to shop drawing, product data, or sample review shall not be used in the work until submittals have been reviewed and bear the stamp and signature of CO.

Submittals will only be reviewed for general conformance with the design concept of the project and general compliance with the information given in the Contract Documents.

Contractor shall be responsible for confirming and correlating all quantities and dimensions, selecting fabrication processes and the means and methods of construction, coordinating its work with that of all other trades, and performing all work in a safe and satisfactory manner.

Corrections or comments made on submittals shall not relieve Contractor from compliance with requirements of Drawings and Specifications and shall not be considered an order for extra work.

1.06 PERMITS AND CODES

A. Owner will obtain the following permits, licenses, and approvals:

1. WDNR Plan Approval and Permit.

B. Contractor shall comply with the requirements of the above permits, licenses, and approvals. If a copy of a permit, license, or approval is not available for review prior to the Bid Deadline, and if it contains a requirement not covered by the Contract Documents, such a requirement will be considered extra work if Contractor makes a claim under the terms of the General Conditions. Work shall not begin on items applicable to the above until the required permit, license, or approval is received.

C. Contractor shall provide all other necessary permits and licenses and pay all fees, taxes, and royalties, unless otherwise indicated.

D. Comply with local and municipal ordinances and applicable state and national codes.

1.07 TEMPORARY UTILITIES

A. Contractor shall be responsible for providing temporary electric power as required for construction purposes. Provide portable power supply or make arrangements with local utility company.

01 01 00-3

B. Contractor shall be responsible for obtaining water for its needs. Pay cost of water used and meter rental, if applicable.

C. Contractor shall provide temporary outside toilets sufficient for construction workers.

Toilets shall be self-contained chemical type and shall comply with applicable Codes.

Maintain sanitary facilities in a clean and sanitary condition; supply toilet paper until completion of project.

1.08 PROTECTION

A. Furnish and maintain proper barricades, fences, signal lights, warning signs, and personnel as required to properly protect and safeguard the work, persons, animals, and property against injury.

B. All earth moving equipment must be inspected by the Forest Service prior to entering the site. This is to ensure it is weed free, therefore preventing the spread of invasive species.

C. All equipment must be washed before entering Forest Service lands and when leaving infested areas to help reduce the spread of invasive species.

1.09 ENVIRONMENTAL CONTROLS

A. See Section 01 57 19.

1.10 TRAFFIC CONTROL

A. Conduct operations to ensure minimum interference with streets, walks, and adjacent facilities not part of construction project.

B. Do not close or obstruct streets, walks, or other occupied or used facilities without permission from authorities having jurisdiction. Provide alternate routes around closed or obstructed traffic ways if required by governing regulations.

1.11 PRODUCT REQUIREMENTS

A. General: Provide new products manufactured and conditioned for the particular application as recommended by manufacturer, unless otherwise noted. Transport, handle, store, and protect products as specified and in accordance with manufacturer's recommendations.

B. Acceptable Manufacturers: Products, materials, and equipment identified by reference to a manufacturer's name, catalog number, or model are identified for the purpose of establishing a standard of type, function, appearance, and quality. Unless otherwise noted, any other product, material, or equipment which will perform adequately the duties imposed by the general design will be considered for substitution in accordance with the provisions below.

C. Substitution Procedures: Requests for substitution of alternate products or use of "or equal" items shall be submitted with complete references to manufacturer's product identification and product data indicating composition, guarantee, availability, applicable standards or agency approvals met or exceeded, restrictions imposed on product, and manufacturer's recommended method of application or installation. A substitution or an "or equal" item will be considered acceptable if the product will perform adequately the duties imposed by the general design and, in opinion of CO, is of equal substance, quality, 01 01 00-4 appearance, and function, unless the named item is necessary for interchangeability or if the named product has been demonstrated to be most cost-effective.

1.12 SURVEYS, STAKING, LINE AND GRADE

A. Owner will provide baseline reference points and benchmarks as indicated on Drawings.

Contractor shall provide all other survey staking and layout as required to complete the Work.

1.13 FIELD MEASUREMENTS AND INSPECTION OF SURFACES

A. Contractor shall layout its Work based on reference points furnished by Owner and shall be solely responsible for the accuracy of its measurements. Verify grades, lines, levels, locations, and dimensions as shown on Drawings, and inspect surfaces that are to receive work before proceeding with fabricating, assembling, fitting, or erecting. Notify CO in writing in case of unsuitable conditions, defective substrates, or discrepancies in Contract Documents. Starting of work shall imply acceptance of conditions.

B. Correct any errors or defects due to faulty measurements, improper layout, or failure to report discrepancies.

1.14 CUTTING AND PATCHING

A. Cut new openings in existing construction as required. Employ skilled workers.

B. Restore surfaces to match adjacent finish. Waterproof and insulate holes in exterior walls.

Backfill and properly compact earthwork needed to perform cutting and patching.

1.15 CONSTRUCTION CLEANING

A. Keep work area free of accumulations of surplus materials, rubbish, and debris.

1.16 PUNCH LIST

A. A "punch list" will be prepared and distributed to Contractor at Substantial Completion.

Items on punch list shall be completed within 30 days. Required submittals (see below) shall be completed prior to or when requesting final payment.

1.17 CLOSEOUT SUBMITTALS

A. Submit the following items to CO prior to or with final Application for Payment:

1. Project record drawings marked to show all changes made during construction.

Dimension underground and concealed work and utilities from permanent reference points; record vertical distances. Make and record measurements to the nearest 0.5 ft on a clean drawing set.

1.18 DEFINITIONS

A. Dimensions on drawings and details are subject to field measurements.

B. The term "working days" shall exclude weekends (Saturday and Sunday) and holidays.

C. References to "WDNR" shall mean Wisconsin Department of Natural Resources.

D. References to "Contracting Officer" or "CO" shall mean United States Forest Service.

01 01 00-5

E. References to "Owner" shall mean United States Forest Service.

END OF SECTION

01 57 19-1

SECTION 01 57 19

TEMPORARY ENVIRONMENTAL CONTROLS

PART 1 GENERAL

1.01 SUMMARY

A. Provide temporary environmental controls as shown and as specified.

1.02 RELATED SECTIONS

Appendix B – WDNR Technical Standards: For copies of the WDNR standards referenced in this section.

1.03 DEFINITIONS

A. References to "WDNR Technical Standards" shall mean Wisconsin Department of Natural Resources Conservation Practice Standards (available on the WDNR web site at http://dnr.wi.gov/topic/stormwater/standards/const_standards.html).

1.04 SUBMITTALS

A. Inspection Reports: Submit one copy of weekly inspection reports for erosion and sediment controls.

PART 2 PRODUCTS

2.01 SILT FENCE

A. Geotextile fabric and support system complying with the requirements of WDNR Technical Standard 1056-Silt Fence.

2.02 SMALL ANIMAL EXCLUSION FENCING

A. If required due to construction dates of project (see "Exclusion Fencing Installation" article, below), exclusion fencing shall meet the requirements of WDNR Amphibian and Reptile Exclusion Fencing Protocols (see Appendix C).

B. Provide up to six small animal turn arounds as directed by CO. Turn arounds shall be incorporated into the silt fence.

2.03 EROSION BALES

A. Straw or weed-free hay, in good condition, with rectangular surfaces, tightly bound with twine (not wire) and nominal dimensions of 30 in. x 18 in. x 14 in.

2.04 SEDIMENT LOGS

A. Sediment logs shall comply with the requirements of WDNR Technical Standard 1071- Interim Manufactured Perimeter Control and Slope Interception Products.

http://dnr.wi.gov/topic/stormwater/standards/const_standards.html

01 57 19-2

2.05 SAND BAGS

A. Bags made of canvas, burlap, nylon, or other CO-approved material filled with concrete sand or other CO-approved granular material.

2.06 INLET PROTECTION DEVICES

A. Devices complying with the requirements of WDNR Technical Standard 1060-Storm Drain Inlet Protection for Construction Sites.

2.07 TRACKOUT CONTROL MATERIALS

A. Manufactured trackout control device or constructed tracking pad complying with WDNR Technical Standard 1057-Trackout Control Practices.

B. If furnishing manufactured trackout control devices, use aggregate as recommended by pad manufacturer. If furnishing stone tracking pads, use Technical Standard 1057, Table 1, stone for tracking pads.

2.08 TURBIDITY BARRIERS

A. Turbidity barriers shall conform to the WDNR Technical Standard 1069-Turbidity Barrier.

2.09 TEMPORARY SEED

A. Temporary seed mixture complying with requirements of WDNR Technical Standard 1059- Seeding for Construction Site Erosion Control.

2.10 PERMANENT SEED

A. See Section 32 92 00.

2.11 EROSION MAT

A. See Section 32 92 00.

PART 3 EXECUTION

3.01 EROSION CONTROL

A. General: Maintain erosion control measures to protect the project site and prevent sediment pollution of adjacent water courses and properties. At a minimum, provide erosion control measures as indicated on the Drawings.

B. Applicable Standards: Unless otherwise shown or specified, erosion control measures shall comply with:

1. "General Permit to Discharge Under the Wisconsin Pollutant Discharge Elimination System (WPDES)" for storm water discharges associated with construction activities.

2. WDNR Technical Standards.

C. Time Period: Install erosion control measures prior to start of construction and maintain them until 70% of vegetation is reestablished. Unless otherwise instructed, remove temporary erosion control measures prior to final application for payment.

01 57 19-3

D. Stripping: Strive to limit stripping of sod and vegetation to a period that will expose bare soil to the least possibility of erosion that construction requirements will allow.

E. Diversions: Construct and maintain dams, channels, flumes, sumps, surface roughening, and other temporary diversion and protective works to divert streamflow and other surface water through or around construction site and away from work while construction is in progress. Unless otherwise specified, a diversion must discharge into the same natural drainageway in which its head waters are located.

F. Sediment Barriers: Construct and maintain one or more sediment barriers to receive runoff leaving site.

1. Affix silt fence to ground and maintain in suitable structural condition to last until vegetation establishes.

2. Affix sediment logs to ground, either by wood stakes (recommended method) or by equivalent anchorage if frozen winter subgrade prevents driving stakes. Equivalent anchorages include using steel posts (removed after vegetation establishes) or erosion bales spaced at same intervals as planned stakes or other approved equivalent method.

G. Storm Drain Protection: Protect storm drain inlets by using inlet protection of the type shown on the Drawings. If not shown, use inlet protection fabric, silt fence barriers, erosion bale barriers, or equivalent.

H. Trackout Control: Prevent tracking of soils and sediments onto public and private streets by constructing and maintaining stabilized work surfaces and trackout controls in accordance with WDNR Technical Standards. Check dual tire vehicles for picked up tracking pad materials prior to leaving site. Refresh and loosen tracking pad as needed to allow stones to contact full tire tread (at least up to start of sidewall) of exiting vehicles. If a vehicle or tire washing station is established, water from washing shall drain into a suitable sediment trap or settling device. Remove at the end of each work day soils and sediment reaching public and private streets not part of the construction site.

I. Re-establishment of Vegetation: Re-establish temporary or permanent vegetation on disturbed areas within the time limits allowed by applicable standards.

J. Sediment Deposits: Remove and dispose of sediment deposits when deposits reach one-half the volume capacity of sediment barrier, unless otherwise indicated.

3.02 TURBIDITY BARRIER INSTALLATION AND MAINTENANCE

A. Turbidity barrier shall be installed, operated, and maintained in accordance with WDNR Technical Standard 1069-Turbidity Barrier. Do not remove turbidity barrier until water behind barrier has equal or greater clarity than waterway.

3.03 EROSION CONTROL MONITORING AND REPORTING

A. Contractor shall conduct the following inspections:

1. Weekly inspections of implemented erosion and sediment controls.

2. Inspections of erosion and sediment controls within 24 hours after a precipitation event that produces 0.5 in. of rain or more during a 24 hour period.

01 57 19-4

B. Contractor shall prepare weekly written reports of all inspections that include:

1. Date, time, and exact place of inspection.

2. Name of individual who performed inspection.

3. An assessment of condition of erosion and sediment controls.

4. A description of any erosion and sediment control implementation and maintenance performed.

5. A description of the present phase of construction at site.

3.04 EXCLUSION FENCING INSTALLATION

A. Project work is seasonally limited to October 1 to March 3. If outside that timeframe, the project requires a clearance survey by a U.S. Forest Service biologist prior to commencing work and J-hook turtle exclusion fencing on both ends of the outlet facilities.

B. If required, project area exclusion fencing shall follow the Wisconsin Department of Natural Resources Amphibian and Reptile Exclusion Fencing Protocols and the document entitled Wood Turtle Culvert Fencing Design (Appendix C). References to Wisconsin Department of Natural Resources Endangered Resources review should be ignored, and instead the Contractor shall consult with and notify U.S. Forest Service Wildlife Biologist Todd Trapp at todd.trapp@usda.gov or (715) 674-4481, ext. 6228 regarding any questions and prior to installation of exclusion fencing. Upon completion of installation of amphibian and reptile exclusion fencing and prior to commencement of project activities, a clearance survey of the project area by a U.S. Forest Service biologist is required. The Contractor shall contact Todd Trapp to coordinate a clearance survey.

3.05 DUST CONTROL

A. Minimize dispersion of dust from construction operations by application of water or other dust control materials. Controls shall confine dust and dirt within the immediate area of project. Masonry and debris shall be thoroughly soaked during demolition and loading operations.

3.06 NOISE CONTROL

A. Provide noise control measures to limit the amount of noise and prevent nuisance. Properly equip all equipment with mufflers. Limit construction activities generating significant noise to normal working hours.

3.07 MATERIAL HANDLING AND SPILL PREVENTION

A. Hazardous materials shall be handled and stored in accordance with the recommendations of the manufacturer and Material Safety Data Sheets (MSDS). Containers or equipment leaking any contaminants shall be repaired, removed from the site, or utilize drip pans for containment purposes.

B. Spills of any contaminants shall be immediately reported to the WDNR Hazardous Waste Substance Spill Hotline at 800.943.0003. Contractor shall maintain an emergency spill kit at the project site containing contaminant containment products and absorbent materials (inlet socks, dry absorbent materials, and similar products).

mailto:todd.trapp@usda.gov

01 57 19-5

3.08 HAZARDOUS ENVIRONMENTAL CONDITIONS

A. If underground petroleum storage tanks, petroleum contaminated soils, or other hazardous environmental conditions are encountered, and are not identified to be part of the work, Contractor shall immediately stop all work in connection with the hazardous condition and shall notify CO. (See the General Conditions of the Contract for specific procedures that may apply.)

01 57 60-1

SECTION 01 57 60

CONSTRUCTION DEWATERING

1.01 SUMMARY

A. Provide construction dewatering as shown and as specified.

B. Work under this Section shall consist of removal of surface water and ground water as necessary to perform required work, including:

1. Building and maintaining temporary impounding works, channels, and diversions.

2. Furnishing, installing, and operating pumps, piping, and other facilities and equipment.

3. Removing temporary works and equipment when no longer required.

C. Contractor shall be responsible for design of dewatering system as specified below.

1.02 SUBMITTALS

A. Cofferdam Cross Section: Submit cross section showing minimum and maximum cofferdam height, minimum and maximum grades near cofferdam, and distance from cofferdam section to nearest dam structure. Top elevations of cofferdams shown on the Drawings are to be considered minimum and may not be reduced unless Contractor obtains CO permission and Contractor accepts all liability for workmanship lost and damages due to premature overtopping of cofferdam.

B. Location Map: Submit phased dewatering plan showing all stages and sequences of cofferdam construction and removal with adequate descriptions so that CO can evaluate possible reductions to flood capacity of dam.

C. Letter of Cofferdam’s Manufacturer Certification or Cofferdam Drawing Bearing Professional Engineering Stamp:

1. If a Contractor plans to use an approved manufactured dewatering system as listed in Part 2 of this Section, then a PE stamp is not required on Contractor’s cofferdam drawing. Submit manufacturer installation drawings (dewatering system dimensions and elevations, construction installation directions/diagrams, and flood water surface elevations) and manufacturer certification that the design meets factors of safety that conform to industry-accepted standards.

2. All other systems require an installation drawing bearing the stamp of a professional engineer who is registered in the state where the cofferdam is to be located. Stamped drawing(s) shall include height and depth of cofferdam, width of cofferdam materials (sheet size or base width), and minimum grade elevations near cofferdam. CO approval of Contractor cofferdam drawing shall be considered only as review in conformance with dewatering intent and not considered as a full structural review or confirmation that cofferdam is suitable for intended purpose.

1.03 PERMITS

A. Project Permit: Rehabilitation of the dam, including cofferdams and diversions, shall be in accordance with Wisconsin Department of Natural Resources (WDNR) permit issued for

01 57 60-2 project. The work is subject to inspection, review, and approval by this agency. Refer to Appendix A for permits.

B. Cofferdam Shown on The Drawings: If cofferdam is shown on the Drawings, then cofferdam structure type, height, location, and sequence have been approved in project permit and cannot be changed without CO permission and possibly a permit modification.

1. Other than a possible dewatering permit, no additional cofferdam permits are necessary if cofferdam type, height, and location are substantially the same as shown in Owner’s approved-permit drawings.

C. Cofferdam Not Shown on the Drawings or Contractor's Design Differs: If cofferdam is not shown on the Drawings or if Contractor wishes to use a cofferdam that differs substantially in location and structure type from that shown on the Drawings, then a permit modification or new permit must be obtained.

1. Contractor shall submit proposed changes to the Drawings for cofferdam structure type, height, and location to CO for determination if differences are substantial enough to warrant a permit modification or new cofferdam permit.

2. If a cofferdam is not shown on the Drawings, any cofferdam that 1) prevents dam from passing design flood flow or 2) discharges earth fill into a water body or wetland will require Contractor to submit and obtain a cofferdam dewatering permit.

3. For bidding purposes, Contractor shall assume that an earthen cofferdam is not permissible unless already shown on the Drawings.

4. Required permits shall be obtained at Contractor’s cost and no additional schedule allowance will be given to accommodate the permit review period.

D. Dewatering Permit: Contractor’s method of accommodating seepage may require a high capacity dewatering permit, a pit trench dewatering permit, or similar permit. Contact WDNR for more details. Required dewatering permit(s) shall be obtained at Contractor’s cost and no additional schedule allowance will be given to accommodate the permit review period.

E. Permit Compliance: Should Contractor's actions or construction not be in compliance with applicable permits, Contractor shall remedy situation as directed by Owner, and all costs associated with those actions shall be borne by Contractor.

1.04 SITE CONDITIONS

A. Information on flood flows at the dam and discharge capacity is presented on the Drawings.

B. Owner will maintain control and operation of dam during construction. Owner will cooperate and coordinate with Contractor in maintaining reservoir levels, providing for reservoir drawdown, and controlling releases.

PART 2 PRODUCTS

2.01 DESIGN REQUIREMENTS

A. Contractor shall be responsible for:

1. Protection of work area and safely passing stream flow for duration of construction.

01 57 60-3

2. Means and methods for dewatering work areas, including the actual dimensions, configurations, stability, and dewatering capacity of cofferdams and protective works.

3. All safety precautions and programs related to the work.

B. Design dewatering system for the conditions indicated.

2.02 MATERIALS

A. Contractor shall furnish all materials for and shall construct and maintain, as it deems necessary, all cofferdams, channels, drains, sumps, and protective works for protection of work areas.

B. Contractor may select whatever materials it wishes for use in cofferdam, subject to permit requirements and the following:

1. No earthen cofferdams are allowed.

2. Sheet piling may not be used within 10 ft of any permanent structure due to potential vibration damage.

2.03 APPROVED MANUFACTURED DEWATERING SYSTEMS

A. Approved manufactured dewatering systems for this project are:

1. Big Bags USA, www.bigbagsusa.com

2. AquaDam, www.aquadam.net

3. PortaDam, www.portadam.com

B. Other manufactured systems will be considered if submitted for approval in accordance with the Instructions to Bidders and Section 01 01 00.

PART 3 EXECUTION

3.01 DIVERTING SURFACE WATER

A. Construct, maintain, and operate cofferdams, channels, flumes, sumps, and other temporary diversion and protective works to divert streamflow and other surface water through or around construction site and away from work while construction is in progress.

Unless otherwise specified, diversions must discharge into the same natural drainageway in which its headwaters are located.

B. Surface water diversion procedures shall not create a condition where erosion or deposition of materials occurs in stream. Riprap or other means of protection shall be provided for erosion protection adjacent to all cofferdams where flows could occur.

C. Diversion works which are moved out of position by any cause during installation shall be righted or enlarged so as to provide necessary clearance.

D. As work area is dewatered, diversion works that are not watertight shall be plugged or sealed as much as practical to reduce infiltration of water into work area.

E. No shoring will be permitted in diversion works which will induce stress, shock, or vibration in permanent structure.

http://www.bigbagsusa.com/ http://www.aquadam.net/ http://www.portadam.com/

01 57 60-4

3.02 DEWATERING EXCAVATIONS AND WORK AREAS

A. Foundations, cutoff trenches, and other parts of construction site shall be dewatered and kept free of standing water or excessively muddy conditions for proper execution of construction work. Furnish, install, operate, and maintain wells, drains, sumps, pumps, and other equipment needed to perform dewatering as specified. Dewatering methods that cause loss of fines from foundation materials will not be permitted.

B. Maintain pumping operations to keep work area dry until all materials, equipment, and debris have been removed and diversion works is to be removed.

3.03 REMOVAL OF TEMPORARY WORKS

A. Remove temporary works when no longer required; level and grade earth as required to restore appearance and to prevent obstruction to flow or any other interference with operation of or access to permanent works.

B. Unless otherwise noted, pipes and casings shall be removed from temporary wells and wells shall be filled to adjacent ground level with gravel or other approved material.

C. Construction dewatering material shall be removed from site and properly disposed of.

D. Contractor shall make its own arrangements for a disposal site and shall pay all costs involved.

3.04 REPAIR OF DAMAGES

A. Contractor shall repair, at its expense, any damage to foundations, structures, or other improvements caused by failure of any part of cofferdams or protective works.

02 41 00-1

SECTION 02 41 00

DEMOLITION

1.01 SUMMARY

A. Provide demolition work as shown and as specified.

1.02 SUBMITTALS

A. Work Sequence: Submit sequence of operation for demolition and removal work for CO's information.

B. Make submittals in accordance with Division 01.

1.03 EXISTING CONDITIONS

A. Prior to bidding, thoroughly inspect existing conditions.

B. Conditions existing at time of inspection for bidding purposes will be maintained by Owner in so far as practicable. However, variations within facilities may occur by Owner's removal and salvage operations prior to start of demolition work.

1.04 KNOWN ASBESTOS CONTAINING MATERIALS AND OTHER SUBSTANCES

A. No asbestos containing materials (ACM) are anticipated during demolition work.

1.05 EXPLOSIVES

A. Use of explosives will not be permitted.

PART 2 (NOT USED)

PART 3 EXECUTION

3.01 PROTECTION OF EXISTING IMPROVEMENTS

A. Comply with requirements of governing regulations.

B. Conduct operations to prevent damage to adjacent facilities. Provide interior and exterior shoring, bracing, or support to prevent movement, settlement, or collapse of adjacent facilities to remain and to prevent premature collapse of structures to be demolished.

Maintain work and site in orderly condition to prevent accidents.

3.02 SALVAGE

A. Items designated for salvage to Owner shall be removed in a workmanlike manner and neatly stored on-site. Items not designated for salvage to Owner shall become property of Contractor and shall be removed from site.

B. Salvaged items capable of disassembly shall be dismantled into individual components or subsections.

02 41 00-2

C. Structural components shall be neatly matchmarked with paint prior to disassembly. All pins, nuts, bolts, washers, plates, and other loose parts shall be marked or tagged to indicate their proper locations and shall be fastened to appropriate member or packed in suitable containers.

3.03 DEMOLITION

A. See Drawings for specific areas, depths, and limits of demolition, removal, salvage, and disposal. Restrict demolition activities to project limits.

B. Provide controls to confine dust and dirt within immediate area of demolition. Thoroughly soak masonry and debris during demolition and loading operations.

3.04 DISPOSAL OF DEMOLISHED MATERIALS

A. Remove from site and legally dispose of all debris, rubbish, and other materials resulting from demolition operations. Storage or sale of removed materials will not be permitted on site. Keep all haul roads clean and free of debris. Take measures to avoid littering waste materials.

3.05 RESTORATION

A. Repair adjacent improvements damaged by demolition operations. Clean adjacent areas of dust, dirt, and debris caused by demolition operations. Return adjacent areas to condition existing prior to start of work.

B. Topsoil, fertilize, seed, and mulch exposed soils in accordance with Section 32 99 10, except areas designated to receive new construction.

3.06 CLOSEOUT

A. Deliver to Owner all designated salvage items; obtain receipts from Owner for materials delivered.

03 30 00-1

SECTION 03 30 00

CAST-IN-PLACE CONCRETE

1.01 SUMMARY

A. Provide cast-in-place concrete work as shown and as specified.

1.02 SUBMITTALS

A. Shop Drawings: Submit shop drawings for fabrication, bending, and placement of concrete reinforcement. Comply with ACI 315.

B. Product Data: Submit product data for each product specified.

C. Mix Designs: Submit proposed mix designs to CO ten days prior to beginning concrete work.

Do not begin concrete production until mixes have been reviewed.

D. Delivery Tickets: Submit delivery ticket to CO for each load of concrete delivered to project.

E. Test Reports: Testing agency shall submit copy of field and laboratory reports to CO.

F. Make submittals in accordance with Division 01.

1.03 QUALITY ASSURANCE

A. Give CO two working days notification of all planned concrete pours so that appropriate construction observation can be present at the project site.

B. Prior to placing concrete, request review of reinforcement steel by CO.

1.04 CODES AND STANDARDS

A. Comply with the following codes and standards, except as otherwise designated:

1. ACI 301 Specifications for Structural Concrete.

2. ACI 304 Guide for Measuring, Mixing, Transporting and Placing Concrete.

3. ACI SP-2 Manual of Concrete Inspection.

1.05 TESTING

A. Contractor shall arrange and pay for services of a qualified testing agency acceptable to Owner and independent of Contractor.

B. Testing agency shall test concrete to measure slump, entrained-air content, temperature, and compressive strength to determine compliance with specifications. Furnish test apparatus and cylinders, perform on-site sampling and testing, submit samples, and perform laboratory tests.

C. On-site tests shall be performed under observation of CO unless waived.

D. Perform slump, air content, and temperature tests prior to concrete placement each day, whenever there is a change in consistency of concrete, and when concrete cylinders are

03 30 00-2 prepared. If measured slump, air content, or temperature falls outside specified limits, immediately check another portion of same batch. In event of a second failure, concrete shall be rejected.

E. During progress of work, prepare one set of test cylinders per 50 cu yd or fraction thereof for each class of concrete placed each day. Identify samples, moist cure in accordance with ASTM C31, and ship samples to testing laboratory.

1. If 6x12 in. cylinders are used, a set shall include three cylinders for laboratory curing.

Obtain one 7-day and two 28-day compressive strength tests.

2. If 4x8 in. cylinders are used, a set shall include four cylinders for laboratory curing.

Obtain one 7-day and three 28-day compressive strength tests.

3. If the requirements specified in the "Cold Weather Placing" article below apply, in addition to the above laboratory cylinders, a set shall also include two extra 6x12 in. or three extra 4x8 in. cylinders for field curing and laboratory testing. Obtain 28-day compressive strength tests on field cured samples.

F. Test procedures shall be in accordance with ASTM C31, C39, C143, C172, C231, and C1064.

G. Cost of tests, including materials and transportation, shall be paid by Contractor and shall be considered incidental to the various items of concrete work.

PART 2 PRODUCTS

2.01 CEMENTITIOUS MATERIAL

A. Cement: Portland cement, ASTM C150, Type I.

B. Fly Ash: ASTM C618, Class C.

2.02 AGGREGATES

A. Fine and coarse aggregates, ASTM C33, consisting of clean, hard, durable sand and crushed rock, crushed gravel, or gravel. Coarse aggregate shall meet grading requirements for size number 67, 57, or 467. Maximum coarse aggregate size for each class of concrete shall be as indicated in Part 4 Schedules. Ratio of coarse aggregate to fine aggregate shall not be less than 1:1 nor more than 2:1.

2.03 WATER

A. Mixing water shall be potable, free of oil, acid, excessive alkalinity, organic matter, and salts.

2.04 ADMIXTURES

A. Air-entrained admixture shall conform to ASTM C260.

B. Other admixtures which do not adversely affect strength and durability of concrete may be used with permission of CO, if used in strict accordance with manufacturer's instructions.

Care shall be exercised to assure that the admixture does not increase or decrease air content outside of allowable limits. Do not use salt or chemical anti-freeze admixtures.

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2.05 FORMWORK

A. Forms for Exposed Finish Concrete: Construct forms for exposed concrete surfaces with water-resistant plywood, metal, metal-framed plywood-faced, or other acceptable panel type materials, to provide continuous, straight, smooth, exposed surfaces. Furnish in largest practicable sizes to minimize number of joints and to conform to joint system if shown.

Provide form material with sufficient thickness to withstand pressure of newly placed concrete without bow or deflection. Rust-stained steel forms are not acceptable.

B. Forms for Unexposed Finish Concrete: Construct forms for concrete surfaces which will be unexposed in finished structure with plywood, lumber, metal, or other acceptable material.

Provide lumber that is dressed on at least one side and two edges for tight fit.

2.06 REINFORCING STEEL

A. ASTM A615, Grade 60, new billet steel bars.

B. Provide metal chairs, stirrups, spacers, and hangers to support reinforcement and insure against displacement during placement of concrete. All supports shall be plastic protected (Concrete Reinforcing Steel Institute [CRSI], Class 1) or stainless steel protected (CRSI, Class 2).

2.07 WELDED WIRE FABRIC

A. ASTM A1064, welded steel wire fabric.

2.08 REINFORCING ADHESIVE

A. General: Diameter and embedment depth of adhesive anchors shall be as indicated on the Drawings. Embedment depth into sound concrete shall develop the yield strength of reinforcing bar.

B. Epoxy Adhesive: Hilti “HIT-RE 500-V3”, Powers Fasteners “Pure110+”, Red Head C6+, Simpson “SET-XP”, or approved equal.

C. Acrylic Adhesive: Hilti “HIT-HY 200”, Powers Fasteners “AC100+ Gold”, Red Head A7+, Simpson “AT-XP”, or approved equal.

2.09 WATERSTOP

A. PVC Waterstop: PVC 6 in. x 1/4 in., split bulb, ribbed type, unless otherwise shown. Use poly (vinyl chloride) with no reclaimed material. Provide factory-fabricated corners, intersections, and directional changes.

B. Hydrophilic Waterstop: Coiled, rope-like, cold joint waterstop impregnated with sodium bentonite which swells upon contact with water; CETCO/Volclay "Waterstop RX", Effective Building Products "Waterstop-Plus", Sika Greenstreak "Swellstop", or approved equal.

2.10 BENCHMARK MARKER

A. Brass or aluminum, 3-1/4 in. diameter, standard monument marker for embedding in cast-in-place concrete.

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2.11 MOISTURE-RETAINING COVER

A. Waterproof paper, polyethylene film, or polyethylene-coated burlap complying with ASTM C171.

2.12 CURING COMPOUND

A. White, waterborne, membrane-forming curing compound, ASTM C309, Type 2, Class B, dissipating.

2.13 CONCRETE MIXTURES

A. Conform to minimum standards for class and usage in Part 4 Schedules.

B. Prepare design mixes for each type of concrete on the basis of compressive strength by methods recommended in ACI 301. Use an independent materials laboratory for preparing and reporting proposed mix designs.

PART 3 EXECUTION

3.01 FORMWORK INSTALLATION

A. Design, construct, erect, brace, and maintain formwork according to ACI 301.

B. Form 3/4 in. chamfers at corners to produce uniformly straight lines and tight edge joints.

Extend terminal edges to required limit and miter chamfer strips at changes in direction.

Unexposed corners may be formed either square or chamfered.

C. Coat contact surfaces of forms with form-release agent, according to manufacturer's written instructions, before placing reinforcement.

3.02 EMBEDDED ITEM INSTALLATION

A. Place and secure anchorage devices and other embedded items required for adjoining work that is attached to or supported by cast-in-place concrete. Use setting drawings, templates, diagrams, instructions, and directions furnished with items to be embedded.

B. Adhesive for reinforcing bars shall not be installed into concrete that is less than 21 days old.

3.03 SLAB SUBGRADE PREPARATION

A. Sprinkle subgrade with water.

3.04 STEEL REINFORCEMENT INSTALLATION

A. Comply with CRSI's "Manual of Standard Practice" for fabricating, placing, and supporting reinforcement.

B. Clean reinforcement of loose rust and mill scale, earth, ice, and other foreign materials that reduce bond to concrete.

C. Position reinforcement steel to provide minimum concrete cover as indicated on the Drawings. Unless otherwise specified on Drawings, minimum reinforcement cover shall be 3 in.

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3.05 JOINTS

A. General: Construct joints true to line with faces perpendicular to surface plane of concrete.

B. Construction Joints: Install construction joints so that strength and appearance of concrete is not impaired, at locations shown or as approved by CO.

C. Contraction Joints in Slabs: Provide contraction (control) joints in slabs-on-grade to form panels of patterns as shown. If joint pattern is not shown, provide joints not exceeding 15 ft in either direction and located to conform to bay spacing wherever possible (at column centerlines, half bays, third-bays).

1. Form contraction joints by inserting 1/4 in. x 1/4 slab depth premolded plastic, hardboard, or fiberboard strip into fresh concrete until top surface of strip is flush with slab surface. Tool slab edges round on each side of insert. After concrete has cured, remove inserts and clean groove of loose debris.

2. Contraction joints in unexposed slabs may be formed by 1/8 in. x 1/4 slab depth saw cuts. Saw joints prior to formation of shrinkage cracks; achieve an even crisp joint.

D. Contraction Joints in Walls: Provide contraction (control) joints in walls as shown. If not shown, provide a contraction joint within 10 to 15 ft of wall corner and at a maximum spacing of 25 ft thereafter.

1. Total depth of inside and outside contraction joints shall be 1/4 of wall thickness.

3.06 WATERSTOP INSTALLATION

A. PVC Waterstop: Provide continuous waterstop where shown on the Drawings and anywhere non-horizontal concrete joints extend upstream to downstream. Splice PVC waterstops by heat sealing adjacent surfaces in accordance with manufacturer's recommendations. Do not expose waterstop to a direct flame which could cause charring.

Lap splices are not permitted. Embed approximately half of the waterstop on each side of joint. Support and protect waterstop during construction and repair or replace damaged waterstop.

B. Hydrophilic Waterstop: Provide hydrophilic waterstop where shown on the Drawings.

Install waterstop in accordance with manufacturer's recommendations. Place joint material to water side of reinforcement; comply with minimum cover requirements.

3.07 MIXING CONCRETE

A. "Ready-mix" concrete shall be produced, delivered and handled in accordance with ASTM C94. Concrete shall be deposited at job site within one hour after introduction of water in mix. Care shall be taken in transferring concrete from truck or mixer to avoid segregation of aggregates in mixture.

3.08 CONCRETE PLACEMENT, GENERAL

A. Place concrete as specified and in accordance with ACI 301. Maintain reinforcing steel in proper position.

B. Deposit concrete continuously or in layers of such thickness that no concrete will be placed on concrete which has hardened sufficiently to cause formation of seams or planes of weakness. If a section cannot be placed continuously, provide construction joints. Deposit

03 30 00-6 concrete as near as practicable to final location to avoid segregation from rehandling or flowing. Do not subject concrete to any procedure which will cause segregation.

C. Screed concrete to proper level to avoid excessive skimming or grouting.

D. Do not use concrete which becomes non-plastic and unworkable, or does not meet required quality control limits, or which has been contaminated by foreign materials. Do not use retempered concrete. Remove rejected concrete from project site.

E. Concrete shall not be placed around castings, frames, joints, and other embedded items until they have been accurately adjusted and set to required alignment and grade. Prior to placing of concrete, castings, frames, and embedded metal fixtures shall be painted on their contact surface with a heavy coat of asphaltic mastic or separated with expansion joint filler.

3.09 PLACING CONCRETE INTO FORMS

A. Deposit concrete in forms in horizontal layers not deeper than 18 in. and in a manner to avoid inclined construction joints.

B. Remove temporary spreaders in forms when concrete placing reaches elevation of spreaders.

C. Consolidate concrete in forms by mechanical vibrating equipment and supplement by hand-spading, rodding or tamping. Use vibrators designed to operate at a speed of not less than 6000 impulses per minute when submerged in concrete. Vibration of forms and reinforcing will not be permitted.

D. Do not use vibrators to move concrete inside forms. Insert and withdraw vibrators vertically at uniformly spaced locations not farther than visibly effective. Do not insert vibrators into lower layers of concrete that have begun to set. At each insertion, limit duration of vibration to time necessary to consolidate concrete and complete embedment of reinforcement and other items without segregation of mix.

3.10 PLACING CONCRETE SLABS

A. Deposit and consolidate concrete slabs in a continuous operation, within limits of construction joints, until panel or section is complete.

B. Consolidate concrete during placing operations using mechanical vibrating equipment.

Thoroughly work concrete around reinforcement and other embedded items and into corners. Consolidate concrete placed in beams and girders of supported slabs, and against bulkheads of slabs on ground, as specified for formed concrete structures. Consolidate concrete in remainder of slabs by vibrating bridge screeds, roller pipe screeds, or other acceptable methods. Limit time of vibrating consolidation to prevent bringing an excess of fine aggregate to surface.

C. Bring slab surfaces to correct level with straight edge and strike off. Use bull floats or darbies to smooth surface, leaving it free of humps or hollows. Do not sprinkle water on concrete surface while in plastic state. Do not disturb slab surfaces prior to beginning finishing operations.

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3.11 COLD WEATHER PLACING

A. Protect concrete work from physical damage or reduced strength caused by frost, freezing actions, or low temperatures, in compliance with ACI 306 and as specified below.

1. When air temperature falls to or is expected to fall below 40 deg F, uniformly heat water and aggregates before mixing to obtain a concrete mixture temperature of not less than 60 deg F (50 deg F for sections thicker than 31 in.) and not more than 90 deg F at point of delivery.

2. Do not use frozen materials or materials containing ice or snow. Do not place concrete on frozen subgrade or on subgrade containing frozen materials. Ascertain that forms, reinforcing steel, and adjacent concrete surfaces are entirely free of frost, snow and ice before placing concrete.

3. During seasons when atmospheric temperature may be expected to drop below 40 deg F, concrete shall be protected by covering with impermeable paper and insulated blankets. Retain covering for seven days.

4. During seasons when atmospheric temperature may be expected to drop below 40 deg F, prepare extra concrete cylinders for field curing in accordance with “Testing” article above. Store field-cured cylinders in a location specified by CO and in accordance with ACI 318 Section 26.5.3.2.

3.12 HOT WEATHER PLACING

A. When hot weather conditions exist that would seriously impair quality and strength of concrete, place concrete in compliance with ACI 305 and as specified below.

1. Cool ingredients before mixing to maintain concrete temperature at time of placement below 80 deg F. Mixing water may be chilled, or chopped ice may be used to control temperature provided water equivalent of ice is calculated in total amount of mixing water.

2. Cover reinforcing steel with water-soaked burlap if it becomes too hot, so that steel temperature will not exceed the ambient air temperature immediately before embedment in concrete.

3. Spray forms, reinforcing steel, and subgrade just before concrete is placed.

4. Do not use set-control admixtures, unless approved by CO.

3.13 FINISHING FORMED SURFACES

A. Provide standard rough finish to formed surfaces to be concealed in finish work or by other construction, unless otherwise designated. Standard rough form finish shall be the concrete surface having texture imparted by form facing material, with defective areas repaired and patched and fins and other projections exceeding 1/4 in. in height rubbed down with wood blocks.

B. Provide standard smooth finish for formed surfaces exposed-to-view or to receive a covering applied directly or bonded to concrete, such as…