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HomeMy WebLinkAboutSPECIAL PROVISIONS - 20-00182 - BYU-Idaho Long Term Parking Expansion Special Provisions 1 of 19 SPECIAL PROVISIONS LONG TERM PARKING LOT EXPANSION BRIGHAM YOUNG UNIVERSITY - IDAHO PROJECT DESCRIPTION AND SCOPE OF WORK This project encompasses constructing a new parking lot in the area northeast of the Center Street / 7th South intersection on the campus of BYU-Idaho in Rexburg, Idaho. The proposed new facility is an expansion of an existing long term parking lot constructed immediately adjacent to the north and east sides of the new parking lot site. Work includes site clearing and demolition of some exiting features; installation of a storm drainage system; concrete curb, gutter, and sidewalk construction; parking lot construction; preparatory landscaping work; excavation and backfill to assist with the installation of a lighting system; erosion control; and allowances for rock excavation and miscellaneous work. The Drawings show the installation of a lighting system but that work will be done by University personnel with the exception of excavation and backfill for the lighting conduit and pole foundations which is to be done by the Contractor as part of the Base Bid. Likewise, the University will be furnishing and installing landscaping components such as sod, trees, and washed river rock around the perimeter and in the islands of the new parking lot; but this will be accomplished after the Contractor prepares the landscape areas by initial excavation and grading as part of the Base Bid. There are not any alternates for this project. This contract will be administered by representatives of the Facility Planning and Construction office of BYU-Idaho, who is the Owner for this project. The Dyer Group, LLC (208-390-9700) will serve as Engineer of Record for the project and as a representative of the Owner. Engineering design, surveying and construction staking, and construction observation will be provided by the Engineer. The Owner will periodically visit the site and provide quality control and materials testing to assure adherence to plans, specifications, and design concepts. GENERAL PROVISIONS Water for Construction: The University will make water available from existing facilities wherever possible, at no cost to the contractor, provided suitable precautions are taken to prevent cross- connections and possible contamination of the water supply. Coordinate with University personnel whenever drawing from University water supplies, or coordinate with the City of Rexburg if using City water. Water used for any purpose on this project is considered incidental to other items. Incidental Items: Any item of work not specifically listed in the Form of Proposal, will not be paid for separately but is to be considered incidental to and absorbed in other items of the contract. Access and Safety: At all times conduct work so as to insure to the greatest possible degree the uninterrupted convenience and safety of the general public and access to areas adjacent to the work. Special Provisions 2 of 19 Noise Impact: To minimize noise impacts on campus, do not conduct construction activities between the hours of 10:00 p.m. to 7:00 a.m., unless approved otherwise by the Owner. Submittals: Furnish shop drawings, equipment or materials catalog cuts, and other similar information to the Engineer for review and approval of all equipment and materials proposed for use on this project prior to beginning work. Engineer will respond to submittals within five days of receipt. Promptly correct and resubmit any submittals deemed unsatisfactory by the Engineer. Testing: The Owner will furnish certified third party quality control testing necessary to assure the workmanship and materials are in accordance with specified compaction requirements as defined later in these Special Provisions. Respond to the tester’s direction given through the Engineer to correct deficiencies identified by the testing and/or to replace defective materials and construction as appropriate to meet the specifications. Surveying: The Engineer will provide general control including benchmarks, and will provide construction staking for the storm drain system, light pole bases, curb and gutter, sidewalk areas, and parking lot construction. An AutoCAD grading model can be provided upon request. The contractor will be responsible to lay out the work from the provided staking as incidental to other items. Note that parking lot striping is not included in the project; the University will lay out and paint the parking area after construction. Traffic Control: Furnish all necessary pedestrian and traffic control for this project in accordance with the Standard Specifications and the Manual on Uniform Traffic Control Devices (MUTCD). It will be necessary to set up to restrict parking and pedestrian circulation in areas around the work perimeter. All pedestrian and traffic control required on this project is considered incidental to other items. Project Schedule: The EPA General Permit Waiver obtained for this project prohibits the start of construction prior to May 1. It is intended to award a contract immediately after bid, start construction as soon as possible after May 1, and to complete the project construction within 60 calendar days of project start. STANDARD SPECIFICATIONS AND DRAWINGS Specifications for this project will follow the Idaho Standard Specifications for Public Works Construction, 2017 edition. Standard Specifications applicable to this project are: Section No. Description 201 Clearing and Grubbing and Removal of Obstructions 202 Excavation and Embankment 204 Structural Excavation and Compacting Backfill 301 Trench Excavation 303 Exploratory Excavation 305 Pipe Bedding 306 Trench Backfill 307 Street Cuts and Surface Repairs 601 Culvert, Storm Drain and Gravity Irrigation Pipe 602 Storm Drain Inlets, Catch basins, Manholes, and Gravity Special Provisions 3 of 19 Irrigation Structures 701 Concrete Formwork 702 Concrete Reinforcement 703 Cast in Place Concrete 706 Other Concrete Construction 801 Uncrushed Aggregates 802 Crushed Aggregates 803 Plant Mix Aggregates 805 Asphalt 810 Plant Mix Pavement 1103 Construction Traffic Control 2050 Construction Geotextiles Standard Drawings applicable to this project are: Section No. Description SD-301 Typical Trench SD-302 Typical Pipe Bedding Section SD-303 Street Cuts and Surface Repair Details SD-612 Standard Manhole – Type A SD-1000 Idaho DEQ Catalog of Storm Water BMP’s PROJECT SPECIFIC CHANGES OR CLARIFICATIONS TO THE STANDARD SPECIFICATIONS The following special provisions amend, modify, change, or clarify Standard Specifications as necessary for this project: 1) Section 202 Excavation and Embankment: Do not scarify the subgrade but do coordinate with the Engineer concerning uniformity prior to placing separator fabric. Use Class A compaction for all backfill. See Specifications herein for compaction requirements. 2) Section 204 Structural Excavation and Compacting Backfill: Make extra effort and provide suitable equipment to properly and thoroughly compact around catch basins, manholes, and light pole bases. 3) Section 305 Pipe Bedding: Use Type I pipe bedding sorted from available excavated material and use Class A-1 Bedding System. 4) Section 306 Trench Backfill: Use Type A-1 trench backfill and compaction (mechanical) in all areas in lifts not to exceed 9”. 5) Section 307 Street Cuts and Surface Repairs: Use the paving section detailed on the Drawings for the parking lot area in repairing trench cuts across existing asphalt areas. Special Provisions 4 of 19 6) Section 703 Cast in Place Concrete: Use Class 4000A or 4000AF (4000 psi) for all concrete on this project. Do not exceed 35% of the total cementitious material for fly ash, if used. Place ½” expansion joint next to existing concrete or structures. See Special Provisions for additional information on placing, jointing, finishing, and curing concrete. 7) Section 801 Uncrushed Aggregate: Clarification is given that this specification refers to uncrushed aggregates, sometimes referred to in these contract documents as granular borrow or pit run gravel. Use 6” gradation or finer and provide proctor for material. See Specifications herein for compaction requirements. 8) Section 802 Crushed Aggregate: Use Type I (3/4” crushed material) gradation and provide proctor for material. See Specifications herein for compaction requirements. 9) Section 803 Plant Mix Aggregates: Use ½” size gradation (commercial mix) and provide Marshall Mix design or equivalent. 10) Section 805 Asphalt: Use PG 58-28 asphaltic concrete for parking lot and asphalt repair pavement. 11) Section 810 Plant Mix Pavement: See Specifications herein for compaction requirements. 12) Section 2050 Construction Geotextiles: Use Type I - moderate survivability, non-woven subgrade separation geotextile for paving section. Provide submittals prior to ordering material. BASE BID SPECIFICATIONS – PARKING LOT CONSTRUCTION SITEWORK AND DEMOLITION (Item 1) General: It is required to prepare the site for construction of the parking lot by performing site work and demolition activities. Required site work consists of removing designated existing landscaping and vegetation; locating, retaining, and protecting designated existing utilities; and clearing and grubbing the new parking lot area. Demolition work consists of cutting and removing existing concrete curb and existing parking lot asphalt in the entrance areas to the new parking lot, cutting and removing existing parking lot asphalt in an area where a buried powerline to the new lighting system is to be installed, and removing two sections of existing wrought iron fencing and corresponding ribbon curb to accommodate a new sidewalk. Materials: Not used. Workmanship: Provide all necessary pedestrian and traffic control for the construction area in accordance with the MUTCD. It is desired to restrict parking and pedestrian access to areas around the north and east perimeters of the worksite, but the northerly vehicular access to the existing parking area should remain open for access to the remainder of the existing parking lot. Retain and protect the existing adjacent parking lot and components such as curbs and gutters, lighting system, landscaping, storm drain facilities, etc. that are outside of the designated Special Provisions 5 of 19 construction area. Remove and replace any areas of curb, gutter, and parking lot to remain that are damaged by construction, at no additional cost to the Owner. Utilities: existing utilities on the site include a buried high voltage power line, buried storm drainage piping, and buried sprinkler piping including valves and controls. The locations of the known existing utilities (other than buried sprinkler lines) are depicted on the Demolition Plan in the Drawings (Sheet 3). The buried high-voltage power line is 12,000 V and consists of conductors inside conduits that have been encased in a dark red colored lean concrete for identification and some degree of mechanical protection. The high-voltage power line crosses under the work area as shown on the Drawings and is reported to be about 3 feet deep to the top of the concrete. The buried high-voltage power line is to be retained and protected. The high-voltage line will be marked by the University prior to, and if necessary, during construction to facilitate protection of the facility. Prior to beginning any excavation or grading, conduct non-destructive exploratory excavation at 3 locations along the high-voltage line to confirm the location and depth. Conduct construction operations to retain and protect the high-voltage line in all instances. The Drawings also show existing storm drainage facilities associated with the existing adjacent parking lot. In particular, there is an underground storm drainage detention facility with large diameter pipes and concrete vaults at each end that has been constructed under the existing bushes along the north side of the new construction area. Retain and protect the buried storm drain piping and structures except as needed to connect the new storm drain system to the existing westerly storm drain vault as detailed elsewhere in these Special Provisions. The University will cut off and cap the water supply piping to the existing sprinkler systems at appropriate locations, and may salvage other equipment such as controls, valves, and valve boxes as they deem appropriate. Otherwise the remaining piping and components of the existing sprinkler systems in the work area will be abandoned in place and can be removed with excavation and grading work as needed. Clearing and Grubbing: the University will cut and remove the existing sod from the majority of the work area, as well as any existing trees in conflict. Perform clearing and grubbing operations on the worksite to the limits of the project footprint, following the Standard Specifications. Remove and dispose of any sod in this area remaining after the University’s sod removal operations. Clean soil and sod removed from the site can be disposed of at an excess materials source owned by the University on University Boulevard, 0.6 road miles distant from the construction site. Otherwise, properly dispose of all vegetation and demolition materials at an approved excess materials site. Demolition: retain and protect the existing improvements around the perimeter of the site outside the construction area. This includes the existing curbs and parking lot pavement on the north and east (except as marked for removal for the entrances to the new facility), the existing landscaped areas on the west and south, and the existing sidewalks on the west and south. The Engineer will delineate areas of the existing curb and gutter and asphalt pavement to be Special Provisions 6 of 19 removed in order to accommodate the entrances to the new facility. These are shown on the Demolition Plan in the Drawings (Sheet 3). Saw cut the existing pavement to full depth and do not begin disruption or removal of the asphalt pavement until the saw cutting has been completed. Likewise saw cut through the existing curb and gutter section at appropriate locations as required to facilitate curb and gutter removal without damage to sections to remain. Similarly, the Electrical Plan (Sheet 8) shows an area where the existing pavement will need to be saw cut and removed for a trench to contain an electrical conduit for extension of the power system to lighting for the new parking lot. Carefully remove concrete curb and gutter by first pushing away from the existing pavement and remaining existing curb before picking up sections. Likewise carefully remove the saw cut portion of the existing pavement in a manner to not damage the existing pavement to remain. Remove the demolished materials from the worksite and dispose of them at an approved materials disposal site. Lastly, it will be necessary to remove two sections of the existing wrought iron fence along the west side of the work area to accommodate a new sidewalk connection. Carefully disconnect the existing fencing from the adjacent support posts and salvage the removed fencing to the Owner’s storage facilities on campus as directed. The University will provide any required touchup painting or other remediation of the remaining fencing and posts. Remove the intermediate fence post that is no longer needed, and then saw cut and remove the corresponding concrete ribbon curb from under the removed fencing segments. Measurement and Payment: A brief, nonexclusive outline of the principal work items intended to be addressed by this specification is as follows: 1) Sitework and Demolition: Payment for site and demolition work for preparing the site for parking lot construction will be made at the lump sum price stated in the Form of Proposal. Payment is to include: S providing pedestrian and traffic control S retaining and protecting existing utilities and existing improvements and landscaping in adjacent areas S exploratory excavation of the high-voltage line S clearing and grubbing of the work area S demolition of designated existing concrete curb and gutter and asphalt pay areas S removing two sections of wrought iron fencing in the west fence line S proper disposal of removed or demolished materials, and S all other work necessary for complete and workable site work and demolition of existing site components STORM DRAINAGE SYSTEM (Item 2) General: it is required to construct a storm drainage system within the new parking lot area to properly collect and dispose of storm water runoff from the new parking lot area. This work includes installation of catch basins and inlets, storm drain piping, and connection of the new storm drainage system to an existing storm water detention facility. Materials: use the following materials: • ASTM D-3034 SDR 26 PVC pipe for storm drain Special Provisions 7 of 19 • ASTM C-858 precast reinforced concrete boxes for catch basins • Flexible, watertight pipe-to-catch basin boot connections, Press-Seal PSX or Kor-N-Seal 106 • Heavy duty cast iron curb inlets with vane style inlet grates, Neenah R-3067-L (only!) • ASTM C-478 precast reinforced concrete manhole sections for manhole • Non-shrink grout for grouting pipe connection to existing detention structure as described herein Workmanship: The Engineer will provide construction staking for the catch basin, pipeline, and manhole locations. Further lay out the work for storm drain system construction as required from the control and staking provided. Install the storm drainage system piping, catch basins, and connecting manhole in accordance with the Standard Specifications. Install catch basins to required elevations, which will then control the elevation and grade of the connecting storm drain pipe between them. Furnish and place the required inlet grates, adjusting them to proper grade (0.10 ft. below finished gutter grade) by using shims or concrete grade rings as required, and fill all voids with non-shrink grout. Install the connecting manhole at the north end of the new system in accordance with the Standard Specifications. Upon completion of construction and final grading, adjust the ring and cover of the connecting manhole to final finished grade, shimming to match the slope as required, and grouting between the manhole ring and concrete cone section or grade ring to fill all voids with non-shrink grout. As directed, core drill a hole in the side of the existing concrete detention structure to receive the 12” pipeline from the new system, and then connect the pipeline to the detention structure using a grouted connection constructed as described below. Before inserting the connecting PVC pipe to the detention structure, treat the area on the pipe that will be grouted in the wall as follows. Apply PVC primer on the exterior of the PVC pipe that will be in the grout area. Then coat the primed area with PVC cement. Then sprinkle clean silica or Ottawa sand on the PVC cement, allowing the application to cure for a minimum of 15 minutes before placing the pipe in the wall of the structure and applying non-shrink grout. This will assure a secure and watertight bond between the PVC pipe and the concrete grout. Thoroughly compact backfill in the pipe trenches and especially around new catch basins and manhole to 96% of maximum density. The Owner will furnish the services of a certified testing laboratory to establish maximum density targets (proctors) for trench backfill, to conduct compaction testing, and to prepare and furnish materials testing reports. Re-compact and re-test any areas not meeting compaction specifications until acceptable results are obtained, without additional cost to the Owner. Low pressure air test the installed storm drain pipe lines as per the Standard Specifications to demonstrate the acceptability of the completed installation. Investigate and properly repair any failing segments. Clean and flush the completed storm drain system, collecting and properly disposing of all removed materials and leaving catch basins and structures clean of any debris. Measurement and Payment: A brief, nonexclusive outline of the principal work items intended to be addressed by this specification is as follows: Special Provisions 8 of 19 2) Storm Drainage System: Payment for the storm drainage system will be made at the lump sum price stated in the Form of Proposal. Payment is to include: S excavation, backfill, and compaction S furnishing and installing storm drain catch basins including curb inlets and grates S furnishing and installing the connection manhole S furnishing and placing 12” PVC storm drain pipe S connecting new pipe to the new structures S core drilling and connecting storm drain piping to the existing detention structure S cleaning and testing of the completed storm drain piping and structures, and S all other related work for complete and workable storm drainage system PARKING LOT CONSTRUCTION (Item 3) General: It is required to construct the new parking lot as detailed on the Drawings. Work includes excavation and grading to proper subgrade, placement of separator fabric and base gravels, and plant mix paving. Construction of the associated perimeter and island concrete curb and gutter is a separate Special Provision and pay item but is mentioned herein as part of the parking lot construction sequence. Materials: Use Type I – moderate survivability non-woven subgrade separation and drainage geotextile fabric on top of the subgrade, 6” minus material or finer for granular borrow (uncrushed aggregate) above the fabric, ¾” minus crushed gravel for road base (crushed aggregate) above the granular borrow, and ½” minus crushed aggregate for plant mix pavement with PG 58-28 asphaltic concrete above the crushed gravel for parking lot pavement and asphalt repairs (commercial mix). Furnish material properties, gradations, proctors, and mix designs for the materials proposed for use. Workmanship: Restrict traffic and pedestrian access to the work area. The Engineer will provide general boundaries, elevation control, and grade stakes where appropriate such as at grade breaks (curb and gutter staking will also be provided as noted under the “Curb and Gutter” section of these Special Provisions). An AutoCAD terrain model of the parking lot area is available from the Engineer upon request. Lay out the work from there, including determining proper subgrade elevations and grades, especially in tip-out curb areas. Follow the provisions in applicable sections of the Standard Specifications for excavation, embankment, gravel material furnishing and placement, and paving. Excavate the existing parking lot construction area to the required subgrade elevation for the new construction, removing and properly disposing of any sprinkler system components encountered. Clean soil and gravels removed from the site can be disposed of at an excess materials source owned by the University on University Boulevard, 0.6 road miles distant from the construction site. Otherwise, properly dispose of all excavated materials at an approved excess materials site. Excavation of the landscape areas within the islands and outside the perimeter curb is covered under the “Landscape Preparation” section of these Special Provisions and is a separate pay item. The Engineer and Owner will inspect the subgrade to determine suitability. Subexcavate and Special Provisions 9 of 19 remove material from areas deemed to be unacceptable as directed by the Engineer and replace with suitable material placed in accordance with the Standard Specifications for embankment and compacted to 95% of optimum density. Removal and replacement of any unsuitable subgrade material will be additional to the contract under the Miscellaneous Work item. Upon approval of the subgrade materials and condition, shape and compact the subgrade to 95% of optimum density as determined from a proctor taken and prepared by the University’s independent testing laboratory. Compaction tests will be conducted by the University throughout the overall fill footprint area and electronic copies of certified results of the compaction testing will be provided to the contractor. Promptly rework and correct any areas determined to have insufficient compaction until such areas achieve the required compaction as demonstrated by additional compaction testing. After Engineer’s field review and acceptance of the subgrade, furnish and place the geotextile separator fabric assuring proper overlap of joints, full coverage under base gravels, and lap up the sides of the excavation. Then furnish, place, and compact the pit run material in accordance with the Standard Specifications, taking care not to disturb or damage the separator fabric (place gravel from above or to the side). Compact to 96% of optimum density as verified by University-provided compaction testing. Re-compact and re-test any areas not meeting compaction specifications until acceptable results are obtained, at no additional cost to the Owner. Once the base gravel has been placed, lay out and construct the concrete perimeter and island curbs in accordance with the “Curb and Gutter” section of these Special Provisions (separate pay item). Placement by curb extrusion from a laydown machine is permissible. Place joints, finish, and cure the curbing in accordance with the “Curb and Gutter” Special Provision, including protecting concrete until properly and sufficiently set to avoid damage from vandalism, pedestrians, vehicles, etc. Then furnish, place, and compact the ¾” crushed gravel material and the plant mix pavement in accordance with the Standard Specifications. Compact the gravel to 96% of maximum density and the plant mix pavement to 95% of target density as established by a Marshall Mix design (or equivalent). Use a straight edge or string line to assure uniform grade and no humps or “bird baths” in the finished asphalt pavement surface. The University will provide the compaction testing. Re-compact and re-test any areas not meeting compaction specifications until acceptable results are obtained and do so without additional cost to the Owner. Layout and painting of pavement markings is not a part of this contract (Owner will provide). Measurement and Payment: A brief, nonexclusive outline of the principal work items intended to be addressed by this specification is as follows: 3) Parking Lot Construction: Payment for the parking lot construction will be made at the lump sum price stated in the Form of Proposal. Payment is to include: S providing traffic and pedestrian control S retaining and protecting existing utilities, fences, adjacent improvements, etc. Special Provisions 10 of 19 S excavation of the site and removal of remaining materials down to the lines and grades necessary for new construction S shaping and compacting the subgrade after excavation and prior to placement of geotextile separator fabric S furnishing and placing geotextile separator fabric on the prepared subgrade S furnishing, placing, and compacting 12” of pit run gravel material S furnishing, placing, and compacting 4" of ¾” crushed gravel material S furnishing, placing, and compacting 2½” of plant mix pavement, and S all other related work for complete and workable construction of the new parking lot CURB AND GUTTER (Item 4) General: It is required to construct curb and gutter around the parking lot perimeter, around the parking lot islands, and along the entryways as shown on the Drawings. Work includes grading and subgrade compaction, furnishing and placing crushed gravel aggregate, constructing concrete curb and gutter as detailed on the Drawings (both regular and tip-out styles), and finishing and curing the concrete in accordance with this Special Provision. Materials: Use ¾” (Type I) crushed aggregate for crushed gravel under the sidewalk, ASTM A-615 Grade 60 reinforcing steel (where required), and Class 4000A or 4000AF concrete. Furnish material properties, gradations, proctors, and mix designs for the materials proposed for use. Use 3”x3”x3” precast concrete dobie blocks to support steel reinforcement. Use monomolecular evaporation reducer on freshly placed concrete, Confilm as manufactured by BASF or E-CON manufactured by L & M Construction Chemicals, Inc., or Owner approved equal. Use resin and water based curing compound on finished concrete, 1100 Clear as manufactured by W. R. Meadows, or Owner approved equal. Use WR Meadows polyurethane NS Sealant, limestone color, for sealing the top of completed expansion joints. Workmanship: Construct the new parking lot gravel section through and under the curb and gutter areas. Furnish, place, and compact the required 6” crushed gravel base layer under the new curb and gutter section to 96% of maximum density. The University will provide compaction testing. Follow the provisions of the Standard Specifications in constructing the new concrete curb and gutter. Match the dimensions shown for the curb and gutter on the Drawings (note both tip-in and tip-out styles are used, depending on location). Match into existing curb and gutter elevations and profile where tying into existing curb and gutter. Place premolded joint filler at the beginning and end of the construction area, at the corners where curb radii begin and end, and where tying into existing curb and gutter. The University will provide concrete testing including slump and entrained air content from the first truckload of delivered concrete and then again after placement of every 50 yd.³ of concrete placed. One set of three concrete test cylinders will be taken for every 50 yd.³ of concrete and tested for compressive strength, one at seven days and the remaining two at 28 days. Copies of concrete quality and strength reports will be provided to the Contractor. Construct contraction joints in the curb and gutter at 10 foot intervals, tooling the edges of the joints and taking care to make sure no "humps" associated with constructing the joints are left in the gutter flowline. Check the flowline and for proper drainage with a string line and level. Special Provisions 11 of 19 After placement, consolidation, and screeding of the concrete; immediately apply the specified monomolecular evaporation reducer in accordance with the manufacturer’s directions and float the constructed curb and gutter section with a wood or magnesium float – do not use steel finishing tools and do not trowel new concrete surfaces. Apply a light broom finish, parallel to the length of the curb. Then immediately after brooming, apply the specified curing compound in accordance with the manufacturer’s directions, thoroughly covering all surfaces including the vertical faces of the curb base (immediately after form removal if need be). Furnish a laborer to stay with the newly placed and finished concrete for a minimum of 4 hours after placement of the curing compound to assure protection of the curb and gutter and curing compound from vandalism and/or trespass by humans or animals. Promptly remove and replace any newly constructed concrete that is damaged at no additional cost to the Owner. Measurement and Payment: A brief, nonexclusive outline of the principal work items intended to be addressed by this specification is as follows: 4) Curb and Gutter: Payment for concrete curb and gutter will be made at the unit price per lineal foot stated in the Form of Proposal. Payment is to include: S retention and protection of any adjacent curbing and pavement S furnishing, placing, and compacting crushed gravel base S forming, furnishing, placing, jointing, finishing, and curing concrete for the curb and gutter S protection of concrete until properly and sufficiently set, and S all other related work for a complete and workable concrete curb and gutter construction 6” CONCRETE SIDEWALK (Item 5) General: It is required to construct new reinforced concrete sidewalks on the west and north sides of the new parking lot, including connections to existing sidewalks, as shown and detailed on the Drawings. Work includes grading and subgrade compaction, furnishing and placing crushed gravel base aggregate, constructing reinforced concrete sidewalk as detailed on the Drawings, and finishing and curing the concrete in accordance with this Special Provision. Note that one connecting sidewalk contains two steps. Materials: Use ¾” (Type I) crushed aggregate for crushed gravel under the sidewalk, ASTM A-615 Grade 60 reinforcing steel, and Class 4000A or 4000AF concrete. Furnish material properties, gradations, proctors, and mix designs for the materials proposed for use. Use 3”x3”x3” precast concrete dobie blocks to support steel reinforcement. Use monomolecular evaporation reducer on freshly placed concrete, Confilm as manufactured by BASF or E-CON manufactured by L & M Construction Chemicals, Inc., or Owner approved equal. Use resin and water based curing compound on finished concrete, 1100 Clear as manufactured by W. R. Meadows, or Owner approved equal. Use WR Meadows polyurethane NS Sealant, limestone color, for sealing the top of completed expansion joints. Special Provisions 12 of 19 Workmanship: Provide pedestrian and traffic control as appropriate to restrict access to the work area where new sidewalks tie into existing sidewalks. Assure the new concrete areas have been excavated and/or filled to the required subgrade depths and grades necessary to accommodate the base gravel and concrete construction. Furnish, place, and compact the required crushed gravel base layer under the concrete sections. Compact the crushed gravel to 96% of optimum density. The University will furnish the services of a qualified materials tester and take compaction tests along the length of the crushed gravel base section under the sidewalk areas. Copies of the test reports will be provided to the contractor. Promptly re-work any areas of the compacted crushed gravel base that do not meet compaction requirements. Follow the provisions of the Standard Specifications in constructing the new concrete sidewalks – matching the dimensions and specifications shown on the Drawings which constitutes the University standard for sidewalk construction in order to accommodate snow removal tractors and other light vehicles that will frequently travel over the completed sidewalks. Place premolded joint filler next to any existing concrete, at the corners where curb radii begin and end, and otherwise at maximum 40 ft. intervals. In constructing the new sidewalk, assure a smooth and uniform transition to any existing sidewalk and that expansion joint material does not protrude above the sidewalk surface in any location. Furnish and place the reinforcing steel grid in the new concrete sidewalk areas as shown on the Drawings, using wired dobies (not chairs) to support the rebar grid sufficient to assure the reinforcement remains up in the middle of concrete section and cannot be depressed to the bottom during construction. Note that reinforcement goes through expansion joints as shown on the Drawings. Construct full width, tooled contraction control joints with rounded edges in the sidewalk at 5 foot intervals. Take special precaution to place additional control joints at any re-entrant corners or penetrations of the new sidewalk such as any light pole foundations, electrical boxes, utility covers, etc. to address the likely cracking that will occur at such areas without proper additional jointing. The University will provide concrete testing including slump and entrained air content from the first truckload of delivered concrete and then again after placement of every 50 yd.³ of concrete placed. One set of three concrete test cylinders will be taken for every 50 yd.³ of concrete and tested for compressive strength, one at seven days and the remaining two at 28 days. Copies of concrete quality and strength reports will be provided to the Contractor. Do not add additional water to the sidewalk concrete mix in the delivery trucks without the express knowledge and approval of the Engineer. Do not “soup up” the concrete mix to aid in or facilitate placement and finishing. Similarly, the use of concrete tampers or other similar devices to force aggregate away from the concrete surface to facilitate finishing is strictly prohibited. Place new concrete and consolidate with concrete vibrators operated in a vertical direction – do not use vibrators to move or “flow” new concrete to areas away from initial placement. Screed concrete to the required lines and grades after placement and consolidation of the concrete. Special Provisions 13 of 19 Immediately after placement, consolidation, and screeding of the concrete, apply the specified monomolecular evaporation reducer in accordance with the manufacturer’s directions and float the constructed sidewalk section with a magnesium float – do not use steel finishing tools and do not trowel new concrete surfaces. Take particular care in changing directions of the float at the front and back of the sidewalk to avoid inadvertently creating humps or dips in the sidewalk surface. Apply a light broom finish, perpendicular to the long axis of the sidewalk. Then immediately after brooming, apply the specified curing compound in accordance with the manufacturer’s directions, thoroughly covering all surfaces, including the vertical faces of the placed concrete immediately after form removal. Provide construction candles and string out construction warning tape to keep pedestrians and vehicles well away from and out of the newly constructed sidewalk and driveway areas. Furnish a laborer to stay with the newly placed and finished concrete for a minimum of 4 hours after placement of the curing compound to assure protection of the concrete and curing compound from vandalism and/or trespass by humans or animals. Promptly remove and replace any newly constructed concrete that is damaged, at no additional cost to the Owner. Measurement and Payment: A brief, nonexclusive outline of the principal work items intended to be addressed by this specification is as follows: 5) 6” Concrete Sidewalk: Payment for concrete sidewalk will be made at the unit price per square yard stated in the Form of Proposal. Payment is to include: S required traffic and pedestrian control S retention and protection of adjacent improvements S excavation to, and shaping and compaction of subgrade S furnishing, placing, and compacting crushed gravel base S furnishing and placing steel reinforcement and grid support S forming, furnishing, placing, jointing, finishing, and curing concrete for the sidewalk to the lines and grades indicated on the Drawings S protection of concrete until properly and sufficiently set, and S all other related and necessary work for a complete and workable concrete sidewalk construction LANDSCAPING PREPARATION (Item 6) General: It is necessary to prepare the areas shown to be landscaped on the Drawings. The Contractor will provide the preparation work as described herein and the Owner will provide and install the landscaping materials and improvements. Contractor work includes installation of PVC sleeves for irrigation or other piping under the parking lot and sidewalk areas, and excavating the landscape areas in preparation for placing the washed river rock, topsoil, sod, and trees that will be furnished and installed by the University. Materials: Use 4” ASTM D-1785 Schedule 40 PVC pipe for sleeves. Workmanship: Coordinate with University personnel on the sleeve placement and excavation of areas to be landscaped. Special Provisions 14 of 19 Install 2 each 4” diameter PVC sleeves under the sidewalks and driveways at each of the areas indicated on the Drawings. Excavate and install to a depth of 18” deep from finished grade. Temporarily cap the ends and backfill and compact in landscape areas to the subgrade elevation. Use a tool (University-provided) to stamp each edge of the fresh concrete sidewalk or curb where the conduit actually passes under to permanently mark the location for future reference. In areas where washed river rock will be installed as landscaping, excavate and remove material to a depth of 6” below finished grade (or top back of curb). Excavate areas where topsoil and sod will be installed to a depth of 12” below finished grade. These areas are designated on the Landscaping Plan (Sheet 7) of the Drawings. As with excavation for the parking area as previously noted, clean excavated soil materials can be taken to the University excess material site. Otherwise dispose of excavated materials at an approved excess material site. The University will furnish and install separator fabric and washed river rock in the areas to receive the river rock; and will furnish topsoil and install sod in other areas so designated. Additionally, the University will install sprinkler systems where appropriate and plant trees where desired. Measurement and Payment: A brief, nonexclusive outline of the principal work items intended to be addressed by this specification is as follows: 6) Landscaping Preparation: Payment for landscaping preparation work will be made at the lump sum price stated in the Form of Proposal. Payment is to include: S coordinating with University personnel as needed for proper installation of planned landscaping and contractor’s associated work S providing traffic and pedestrian control S furnishing and installing PVC sleeves under parking lot and sidewalk areas as shown on the Drawings; including excavation, backfill, and compaction S excavating and removing material from areas designated to be landscaped, and S all other related and necessary work for complete and workable landscaping preparatory work in the areas to be landscaped (final grading, tree planting, sod placement, sprinkler systems, and washed rock placement will be by Owner) LIGHTING PREPARATION (Item 7) General: It is required to assist the Owner in preparing for construction of the lighting system for the parking lot by performing excavation and backfill work. Work is to include excavation and backfill for the concrete light pole foundations detailed on the Drawings, and also excavation and backfill for the installation of all conduits for the lighting system electrical power supply. The University will provide the concrete and construct the light pole foundations, and will also provide and install the electrical conduit and wiring after contractor excavation and prior to contractor backfilling and compaction. The University will also provide and install the poles, fixtures, and controls for the new lot lighting system. Materials: Not required (University will provide and install). Special Provisions 15 of 19 Workmanship: Coordinate with University personnel on the layout and needed underground installations for the lighting system, including excavation and backfill requirements and locations for light pole bases and locations for conduit runs. The Engineer will stake the light pole foundation locations. Place offsets as may be required to reestablish the center of the light pole foundation after excavation is made. Excavate to the required elevation to accommodate the light pole foundation design as detailed on the Drawings. After construction of the pole foundation by the University, carefully and thoroughly backfill and compact around the light pole foundation to the required subgrade elevation. Excavate trenches for accommodating the electrical conduit necessary to supply power to each of the pole locations. Generally follow the layout depicted on the Electrical Plan (Sheet 8) in the Drawings, but coordinate closely with University personnel for exact location and placement. Excavate to a depth of 18” below finished grade. Note this also includes a short run across the existing parking lot where connection to existing power will be made. After the University has furnished and placed the electrical conduits, carefully and thoroughly backfill and compact the conduit trenches to 96% of maximum density of the material. The University will provide the services of a certified materials testing laboratory to conduct the compaction testing and will provide reports to the Contractor. Measurement and Payment: A brief, nonexclusive outline of the principal work items intended to be addressed by this specification is as follows: 7) Lighting Preparation: Payment for lighting preparation work will be made at the lump sum price stated in the Form of Proposal. Payment is to include: S coordinating with University personnel as needed for proper installation of the light pole foundations and conduit for the lighting system S excavating the light pole foundation areas and then compacting backfill around them after construction of the pole foundations by Owner S excavating trenches for the lighting system conduit from the power source and throughout the lighting system as indicated on the Drawings; and then backfilling and compacting the conduit trenches after conduit placement by the Owner, and S all other related and necessary work for a complete and workable excavation and backfill work for the lighting system (furnishing and installing the lighting system including foundations, conduits, conductors, poles, and light fixtures will be by the Owner) EROSION CONTROL (Item 8) General: Although the area of disturbance is 1.6 acres, an exemption from the EPA General Permit has been obtained for this project through the Low Erosivity Waiver Certification which recognizes limited precipitation in certain months and therefore reduced potential for significant runoff. Therefore the General Permit and its notice of intent and stormwater pollution prevention plan requirements do not apply to this project if construction is started after May 1 and completed before September 30. However, for proper environmental stewardship it is required to implement stormwater best management practices (BMP's) to mitigate stormwater runoff from the site and potential erosion/sedimentation. Special Provisions 16 of 19 Materials: Stormwater management materials and practices will follow the “Catalog of Stormwater Best Management Practices for Cities and Counties” document as published by the Idaho Department of Environmental Quality, latest edition. The Catalog presents and describes various stormwater management practices. Those applicable to this project are identified by following the same identification numbers shown in the DEQ Catalog in the “Erosion and Sediment Controls” section: No. Description 1 Timing of Construction 3 Preservation of Existing Vegetation 5 Stabilization of Construction Entrance/Exit 7 Dust Control 10 Spill Prevention and Control 13 Concrete Waste Management 31 Inlet Protection 35 Fiber Roll 36 Silt Fence Workmanship: Conduct work and maintain the work area to minimize disturbance and potential for stormwater runoff. Employ best management practices (BMP’s) for erosion control, maintaining and improving erosion control measures as necessary throughout the duration of the project until final vegetation is established. Likewise control dust produced during construction by limiting disturbed areas to the minimum needed, watering disturbed and fill areas to minimize dust production, and otherwise employing best management practices associated with dust prevention/reduction. Sheet 10 of the Drawings shows the erosion control BMP’s proposed for this project. The applicable stormwater BMP's are identified in the legend and their proposed locations are shown on the Erosion Control Drawing. The items selected and their proposed locations are to be considered a minimum acceptable approach to erosion control, however the Contractor is free to develop and submit to the Engineer and Owner for approval an alternate erosion control approach which may contain other justifiable BMP's and/or adjust component locations to facilitate construction without reducing runoff control. Follow the guidelines and information in the DEQ Catalog for implementation of the erosion control BMP’s. This includes specifications regarding materials and methods to be used, and likewise follow the standard detail drawings that have been prepared to describe proper implementation of the various stormwater BMP's. Also follow the provisions of the DEQ Catalog with regard to inspection, maintenance, and updating of the stormwater BMP's. This includes regular observation of the installed BMP's to assure their proper condition and appropriate function. Inspection after each precipitation or runoff event is critical to verify that the stormwater BMP's are properly functioning and to identify any maintenance or repairs necessary to keep them in proper working condition. Special Provisions 17 of 19 Upon completion of the landscaping element of the project, disturbed surfaces will be vegetated or otherwise stabilized which will provide permanent erosion control. In any other disturbed areas outside the project landscape area, remove any accumulated refuse or debris, grade and smooth the surface, and coordinate with the University with regard to surface restoration. Throughout the duration of the project, periodic inspections of the erosion control BMP's will be made by the Owner and Engineer. Promptly respond to all directives they may give concerning the maintenance and function of the erosion control BMP's. Measurement and Payment: A brief, nonexclusive outline of the principal work items intended to be addressed by this specification is as follows: 8) Erosion Control: Payment for erosion control BMP’s will be made at the lump sum price stated in the Form of Proposal. Payment is to include: S becoming familiar with the BMP requirements as set forth in the DEQ Catalog S furnishing and installing the erosion control BMP materials in accordance with requirements in the DEQ Catalog S maintaining the site to minimize runoff potential and associated impacts S keeping a clean work area and providing dust control S regularly monitoring the BMP’s for condition and performance, and providing maintenance or upgrading as needed and appropriate S restoring areas disturbed by construction upon project completion, and S all other related and necessary work for complete and workable erosion control measures for the project and worksite ROCK EXCAVATION (Item 9) General: Lava rock is generally encountered within 3-5 feet below the ground surface at the project site. While the project has been designed to be able to avoid lava rock to the extent possible, there may potentially be a need to excavate and remove conflicting lava rock to accommodate the needed construction. This could occur with deeper installations such as the light pole foundations and catch basins. Accordingly, a contingency amount of rock excavation has been included in the contract to provide for rock excavation and removal should the need arise. Work includes blasting or hammering conflicting rock to break it up and then removing the rock from the site to allow necessary project elements to be properly located and constructed. Work also includes backfilling and compacting the remaining area of the rock excavation with suitable material to fill remaining voids. Materials: Not applicable. Workmanship: If lava rock is found to be in conflict with proposed construction components, immediately contact the Engineer for consultation. The Engineer will determine if rock excavation is required and will obtain specific approval of the Owner to authorize needed rock excavation. Rock excavation may be needed for deeper installations such as light pole bases, catch basins, and perhaps storm drain piping. However, rock encountered under the parking lot area may not need to be excavated, depending on its depth and the amount of gravel surfacing section that can be installed above it. Special Provisions 18 of 19 Follow the provisions of the Standard Specifications in providing for rock excavation. Rock may be loosened and broken by blasting or hammering. If blasting measures are employed, follow industry standards and best practices to maximize safety associated with controlled blasting. Furnish equipment and labor necessary to excavate the broken rock and remove it from the construction site. The University has an excess material site 0.6 miles distant from the project location that can accept clean excavated rock. Otherwise dispose of excavated rock material at an approved excess material site. After installation of the corresponding project component in the excavated rock area; furnish, place, and compact pit run gravel or other Engineer approved material in the area between the component and the remaining edges of the rock excavation area to fill the void as part of the backfilling process. Measurement and Payment: A brief, nonexclusive outline of the principal work items intended to be addressed by this specification is as follows: 9) Rock Excavation: Payment for required and authorized rock excavation will be made at the unit price per cubic yard stated in the Form of Proposal. Payment is to include: S notifying and coordinating with the Engineer when conflicting rock is encountered S obtaining specific approval for rock excavation prior to beginning rock excavation work S furnishing necessary equipment to break up, excavate, and remove conflicting rock – disposing of it at an approved location S backfilling and compacting the rock excavation area with appropriate material after the project element has been constructed, and S all other related and necessary work for complete rock excavation and removal as determined to be necessary Contractor is advised this is a contingency item that may not be used at all or may substantially vary from the estimated quantity given in the Form of Proposal. MISCELLANEOUS WORK (Item 10) General: Work in areas such as this project site can result in unforeseen conditions that may be encountered, or the need to make modifications to the work at specific locations from what has been represented on the Drawings. A contingency amount of miscellaneous work has been included in the contract to provide greater flexibility in approaching such situations. Materials: As required for the negotiated and approved miscellaneous work. Workmanship: Coordinate with Engineer on miscellaneous work required to properly address unforeseen conditions or situations encountered during construction that may represent a change of conditions, or that may be requested by the Owner. Provide justification and documentation to the Owner for associated costs of the needed miscellaneous work. Furnish all materials, equipment, and labor necessary to properly install or construct the approved miscellaneous work. Perform work in accordance with the Standard Specifications, the Special Provisions (as applicable), and/or industry-standards as directed by the Owner or Engineer. Special Provisions 19 of 19 Measurement and Payment: As noted in the Form of Proposal, the unit price for Miscellaneous Work is fixed and the final pay quantity will be computed and adjusted as required to pay the negotiated and approved total amount for approved miscellaneous work. 10) Miscellaneous Work: Payment for miscellaneous work required on the project as directed and approved by the Owner to be performed will be made at the unit price of $1.00 as stated in the Form of Proposal. Pay units will be computed to cover authorized and negotiated costs for miscellaneous work required on any portion of the Base Bid work. Payment is to include: S coordinating with the Owner or Engineer on required extra work S justifying and documenting costs to Owner for approval and authorization prior to actual construction of any miscellaneous work S furnishing materials, labor, and equipment required to conduct the approved miscellaneous work, and S all other related work for complete and workable miscellaneous work necessary to complete the contract that is requested and approved by the Owner for incorporation into the final product Contractor is advised this is a contingency item that may not be used at all or may vary substantially from the estimated quantity given in the Form of Proposal. -- End of Special Provisions --