Addendum # 1 Bid No. S-1-18 Chip Seal Project Part II July 28, 2017

Transcription

1 Addendum # 1 Bid No. S-1-18 Chip Seal Project Part II July 28, 2017 The following items have been revised in, or added to, the project bid documents. 1. The construction schedule (Administrative Instruction Section 7.05) shall be phased as follows: a. chip seal preparation including patching shall be completed in 2017, and b. chip seal application can be performed in 2018 as weather permits. 2. The chip seal aggregate shall remain crushed granite. Alternate aggregate sources will not be considered. 3. The bid submittal has been revised to add unit cost only for emulsified asphalt binder, revised bid submittal attached. 4. The Special Provision Chip Seal with Fog Seal in the provided Bid/Contract Documents approved July 19, 2017 shall be replaced with the attached Special Provision Chip, Double Chip, Chip with Overshoot and Geotextile Reinforced Seal.

2 BID NO. S-1-18 Cheyenne Chip Seal Project No. 2 BID SUBMITTAL Date Time TO: City of Cheyenne OWNER 2101 O Neil Avenue ADDRESS Cheyenne, Wyoming CITY/STATE FROM: BIDDER ADDRESS BID SUBMITTAL: CITY/STATE 1. Having become completely familiar with the local conditions affecting the cost of work at the place where work is to be executed, and having carefully examined the site conditions as they currently exist, and having carefully examined the bidding document for the following project: 2017 City of Cheyenne Chip Seal Project No. 2 (Bid No. S-1-18) together with any addenda to such Bidding Documents as listed hereinafter, The undersigned hereby proposes and agrees to provide all labor, materials, plant, equipment, transportation taxes, allowances, and other facilities as necessary and/or required to execute all of the work described for the scope of work required for the Base bid by the aforesaid Bidding Documents for the lump sum consideration of: said amount being hereinafter referred to as the Bid. Dollars ($ ) Bid Schedule PAGE 1

3 Bid Sheet For BID No. S City of Cheyenne Chip Seal Project Part 2: Unit No. Description Units Quantity Cost Extended Cost 1 Bonds & Insurance LS 1 2 Mobilization LS 1 3 Demobilization LS 1 4 Force Account FA 1 $50,000 5 Quality Control Testing LS 1 6 Traffic Control LS 1 7 Chip Seal with Overshoot 1 SY 138,970 8 Double Chip Seal with Overshoot 2 SY 54,929 9 Asphalt Patch 3 SY 2, Additional Asphalt Patch 4 SY/IN 1, Paving Fabric 5 SY 19, Emulsified Asphalt Binder 6 Gallon - - Total Cost: Unit Cost Notes Note 1: To include a single chip seal application on CRS 2 Polymer modified emulsified asphalt binder with Grading C aggregate and overshoot Note 2: To include a double chip seal application on CRS 2 Polymer modified emulsified asphalt binder with Grading C aggregate for the base application of chips and Grading D for the final application and overshoot Note 3: Based on 4 inches of asphalt, 8 of Grading W base course, and subgrade preparation Note 4: For patches requiring asphalt thickness greater the 4. Value to be used as an add or deduct based quantity verified during construction. Note 5: To include deliver and installation, supply and place PG paving asphalt, and cost of manufacturer s representative to be on-site during installation. Note 6: Include unit cost only. Prepared by: Date: Bid Schedule PAGE 2

4 SECTION CHIP, DOUBLE CHIP, CHIP WITH OVERSHOOT AND GEOTEXTILE REINFORCED SEAL PART 1 GENERAL 1.01 SUMMARY A. This section describes the requirements for placing a single or double chip seal, chip seal over pavement fabric and an emulsified overshoot, in accordance with these specifications and in reasonably close conformity with the lines shown on the plans or established by the ENGINEER. B. The Contractor shall furnish all labor, equipment, material, supplies, environmental protection, no parks, raised markers, signage (including no parking zones), traffic control, secondary sweeping and other incidentals necessary to provide a chip seal, double chip seal, chip seal with emulsified overshoot and/or chip seal over pavement fabric on properly prepared existing roadway surfaces RELATED WORK A. Section Aggregates. B. Section Road Mix Bituminous Pavements. C. Section Plant Mix Pavements. D. Section Bituminous Materials REFERENCES A. AASHTO M140: Emulsified Asphalt. B. AASHTO M208: Cationic Emulsified Asphalt. C. AASHTO M226: Table 1, Viscosity-Graded Asphalt Cement. D. AASHTO M81: Cut-Back Asphalt (Rapid Curing Type). E. AASHTO M82: Cut-Back Asphalt (Medium Curing Type) Page 1 of 20

5 F. AASHTO T40: Sampling of Bituminous Materials DEFINITIONS A. Chip Seal. An application of emulsified asphalt followed by an application of aggregate and, when specified, an emulsified asphalt overshoot. B. Double Chip Seal. Double Chip Seal shall consist of one (1) application of emulsified asphalt followed by an application of aggregate followed by a second application of emulsified asphalt and a second application of aggregate. C. Chip Seal over Geotextile Reinforced Pavement Fabric. An application of paving asphalt binder followed by placement of pavement fabric, including a Chip Seal or Double Chip Seal and when specified, an emulsified overshoot SUBMITTALS A. Certificates to be provided no less than 5 days prior to start of construction. 1. Chips (screenings) 2. Pavement Fabric 3. Emulsion B. Field samples 1. Hot Oil 2. Emulsion C. Weigh Tickets to be provided within one (1) day after delivery to the project for emulsified asphalt and aggregate Page 2 of 20

6 PART 2 PRODUCTS 2.01 MATERIALS A. PAVEMENT FABRIC The fabric used for this process shall be a nonwoven, needlepunched, thermally bonded on one side, 100% polypropylene staple fiber fabric that conforms to the following properties: Property Test Method Minimum Average Roll Value Grab Tensile Strength (lbs./kn) ASTM D minimum Grab Tensile Elongation at Break (%) ASTM D minimum Mullen Burst Strength, (PSI) ASTM D minimum Mass Per Unit Area (oz/sy) ASTM D minimum Asphalt Retention (G/SY) ASTM D oz/SY residual minimum * The paving fabric should be installed per the recommendations of the manufacturer and as discussed in Section 3.02-C. A representative of the fabric manufacturer must be on-site when the fabric is installed to verify that the fabric is installed per their recommendations. B. BITUMINOUS MATERIAL 1. The type of bituminous material shall be specified in the Contract Documents. The grade shall be designated and approved by ENGINEER. 2. The bituminous material shall meet the applicable requirements of SECTION 02545, BITUMINOUS MATERIALS. 3. For overshoots, use emulsions SS-1h or CSS-1h, as appropriate. 4. Provide and use a blend of asphalt binder, water, emulsifiers and polymer, if specified. When specified, polymerize using at least 3 percent polymer by weight of the asphalt binder. 5. Ensure that emulsions show no separation, such as a white/milky appearance after mixing in tank, are smooth and homogeneous throughout, and are in accordance with material specifications. Provide pumpable emulsion suitable for application through a distributor without plugging or reducing the flow through filters, piping or nozzles Page 3 of 20

7 C. AGGREGATES 1. Use aggregate that is tough and sound, of uniform quality, and crushed to size, for the type specified. The material shall be accepted based on periodic samples taken at the latest practicable point prior to incorporation into the work. 2. Chip Seal Aggregate. a. The chip seal or cover coat material shall be washed, hard, durable, clean rock and free from coatings or deleterious material. All of the aggregate shall be crushed granite Meeting the requirements given in Table Property Test Method Specification LA Abrasion loss, max., % AASHTO T96 35 Flat and elongated (1:5 ratio), max. (1), % ASTM D4791 (Method A) 10 Fractured Faces, min. (2), % AASHTO T335 95/90 Plasticity Index (3) AASHTO T90 NP (1) Flat and elongated will be tested on coarse aggregate (plus No. 4 [4.75 mm] fraction). (2) Percentage designation such as 95/90 denotes 95 percent of the coarse aggregate has one or more fractured faces and 90 percent has two or more fractured faces. (3) Based on minus No. 4 [4.75 mm] fraction of composite blend. Sieve Size b. Only one source of aggregate shall be used and shall conform to the following gradations. Table Target Value Ranges for Single and Double Course Chip Seal Aggregate Gradation 1 1/2 inch (37.5 mm) 1 inch (25 mm) 100 (1) Percent by Mass Passing Designated Sieve (AASHTO T 27 & AASHTO T 11) Grading Designation A B C D 3/4 inch (19 mm) (3) 100 (1) 1/2 inch (12.5 mm) 0-35 (5) (3) 100 (1) 3/8 inch (9.5 mm) 0-12 (3) 0-35 (5) (3) 100 (1) No. 4 (4.75 mm) 0-12 (3) 0-35 (5) (3) Page 4 of 20

8 No. 8 (2.36 mm) 0-8 (3) 0-23 (4) No. 200 (0.075 mm) (0.5) (0.5) (0.5) (0.5) (1) Statistical Procedures do not apply ( ) The value in the parenthesis is the allowable deviation (+) from the target values. Note: Grading D shall used for single chip seal application. For double chip seal applications, Grading C shall be used for base application and Grading D for surface application. 3. Blotter Aggregate a. Aggregate for Blotter: For blotter material, provide aggregate with a plasticity index of 3 or less and in accordance with the following gradation: Table Blotter Aggregate Gradation Sieve Size % Passing 3/8 inch (9.5 mm) 100 No. 4 (4.75 mm) No. 200 (75 um) 0-10 b. For chip seal applications, provide blotter aggregate with the same color as the chip seal aggregate. c. Ensure emulsion and aggregate are compatible for chip seals. Compatibility is defined as the ability of the aggregate to allow sufficient coating by emulsion residue and resist coating loss from adverse water exposure. Ensure that final retained coating of at least 80 percent. If necessary, change the emulsion type or aggregate source to ensure compatibility. If a polymeremulsion is specified, do not change to a non-polymermodified emulsion. If changes of materials are required to provide compatibility, notify Engineer immediately for approval. PART 3 EXECUTION 3.01 PREPARATION A. The Contractor shall be responsible for all measures required providing a thoroughly clean and dry pavement surface including vegetation removal and sweeping prior to the Chip Seal application. The surface to be treated Page 5 of 20

9 shall be swept clean of all dirt, sand, dust or objectionable matter by means of a power sweeper. Dried mud or other foreign matter which cannot be removed with the power sweeper shall be removed by hand, blade, or other methods. B. Bituminous material shall not be spread until the surface has been cleaned as required and the section to be sealed has been approved by the ENGINEER APPLICATION A. WEATHER LIMITATIONS 1. Place chip coat from June 15 to August 31, unless otherwise approved in writing by the engineer. Place seal only on a dry surface. The Chip Seal shall not be applied when the pavement is moist, or when the weather is or may be detrimental. Detrimental weather is defined as rain showers, cool temperatures, moist pavements, threat of rain showers, or other environmental factors which could affect the performance of the Chip Seal construction. 2. Place the applicable Chip Seal in accordance with the following criteria: a. Ambient air temperature is above 65 F (18 C); b. Surface temperature in the shade is above 60 F (16 C); c. Surface temperature in the sun is below 150 F (66 C); d. Weather is not foggy or rainy; e. Rain or temperatures below 40 F (4 C) are not anticipated for at least 24 hours after application; f. Sustained winds are less than or equal to 10 miles (16 kilometers) per hour; and g. Application is completed at least 2 hours before sunset. B. EQUIPMENT 1. The size and condition of all equipment shall be approved prior to construction. Should equipment be unsatisfactory for whatever Page 6 of 20

10 cause, the Contractor shall remove and replace the equipment without delay or cost. The Contractor shall cease seal coat application if any equipment integral to either the compaction, sweeping or traffic accommodation operations is not available or is not in good working order, as determined by the Engineer. The equipment used by the Contractor shall include, but not be limited to, one or more of the following and shall conform to the following minimum requirements. 2. Asphalt Distributor. The asphalt distributor shall contain suitable mechanical circulating and heating mechanisms to provide a uniform approved temperature of the entire mass of material. The distributor shall be equipped with a radar type sensor used to measure ground speed, and feed a Digital Volumetric Accumulator capable of measuring liters applied and distance traveled. It shall be capable of applying asphalt material in accurately measured quantities at any rate between 0.1 to 2.0 gallons per square yard, of roadway surface, at any length of spray bar up to 16 feet. The uniformity of the distributors shall not vary by more the twohundredths gallons per square yard. The distributor shall be capable of maintaining a uniform rate of distribution of asphalt material regardless of change in grade, width or direction of the road. It shall be equipped with an electronic control for setting asphalt pump discharge rate and on/off switching of spray for nozzles in one (1) foot, increments which shall be located in the truck cab. The distributors shall be equipped with a variable power unit for the pump and full circulation spray bars, which are adjustable laterally and vertically. The spray nozzles and pressure system shall provide a sufficient and uniform fan-shaped spray of asphalt material throughout the entire length of the spray bar at all times while operating. The spray shall completely cover the roadway surface receiving the treatment. The nozzle angle and bar height shall be set to provide one hundred percent of double coverage in a single pass. Where multiple passes will be required to complete the full width, the four inches adjacent to the second pass may be left with fifty percent coverage so that the next pass will complete the full application rate specified. Distributors shall be self-powered and include a computerized application controls, a tachometer, pressure gauges, accurate volume devices, calibrated tank, and a thermometer for measuring temperatures of the emulsion in the tank. The distributor shall maintain two-way radio communication with the aggregate spreader.. 3. Sweeper. A sufficient number of power operated rotary sweepers to adequately broom loose aggregate from all sections of seal Page 7 of 20

11 coated roadway. All power sweepers shall be equipped with a minimum of one yellow rotating warning light. A minimum of two vacuum designed sweepers having only negative air pressure at the road surface capable of removing excess aggregate and debris material shall be used on this project. The body hoppers of the vacuum sweepers shall be a minimum capacity of ten cubic yards, and the negative air pressure at the intake shall be rated at 46 inches of negative water pressure. Sweepers shall meet applicable U.S. Environmental Protection Agency Standards. Any areas adjacent to the project where a vacuum broom cannot access, shall be removed by the use of a blow pack. No mechanical pickup brooms will be allowed on the project. 4. Pneumatic-tire rollers. A minimum of two (2) rollers, with at least one (1) pneumatic tire roller, shall be used on each treated surface immediately after the stone has been applied. Each roller shall have a compacting width of not less than 5 feet and a gross weight of not less than 7 tons. Vibratory rollers having rubber coated drums will be permitted providing they are operated in the static mode only. Wobble wheel type rollers shall not be used. The rollers shall be capable of reversing direction without causing backlash or damage to the Seal Coat. The pneumatic-tired rollers hall have a gross mass of which shall be adjustable to apply two hundred (200) to three hundred-fifty (350) pounds of rolling width as directed. Tire pressure, and contact pressure shall be 80 psi [550 kpa] minimum. Equal air pressure shall be maintained in all tires, plus or minus 5.0 psi. Pneumatic-tired rollers shall be operated at a maximum speed of five (5) miles per hour. Depending on the speed of the Chip Seal operation and the width of coverage, additional rollers may be required. At no time shall the rollers travel more than 10 miles per hour. 5. Aggregate spreader. The aggregate spreader shall be hydrostatically driven and self-propelled supported by at least four (4) wheels equipped with pneumatic tires on two (2) axles. It shall be equipped with a hydraulically controlled variable adjustable head that is capable of providing a uniform application rate of aggregate from five to fifty pounds per square yard in widths from 4.5 to 18 feet in a single pass. The uniformity of this machine shall not vary by more than one pound per square yard. The spreader shall apply the treated stone on the road surface in a manner that ensures that the tires do not contact the road surface until after the stone has been applied. The unit shall be equipped with an electronic radar type sensor used to measure ground speed and will automatically adjust the stone application rate depending on width Page 8 of 20

12 of application and the speed of chip spreader. It shall have the ability to apply stone on any grade from 0-6%. The spreader shall be equipped with an integral hopper with a minimum capacity of 5 tons of treated stone which shall be filled by trucks in a manner which ensures that the truck tires never come in contact with asphalt-treated road surfaces until the stone has been properly applied. It will capable of maintaining positive engagement over irregular terrain. The spreader shall be equipped with the necessary devices to enable it to be attached securely to the aggregate haul truck while in the process of dumping the aggregates into the spreader to maintain constant stone application, stopping the chip spreader. Other types of aggregate spreaders may be used provided they accomplish equivalent results and are approved by the ENGINEER. 6. Trucks. Rear discharge conveyor-fed trucks in sufficient number and size must be used to deliver aggregate to the spreader. C. PAVEMENT FABRIC 1. A representative of the fabric manufacturer should be present on site during initial fabric placement. 2. Where connecting to existing pavement sections or providing a pavement overlay, thoroughly clean the existing surface where pavement is to be placed. Remove all loose dirt, dust, sand, and other foreign matter. 3. Pavement fabric shall be placed by the asphalt distributor into PG paving asphalt binder applied at the rate of.30 to.40 gallons per square yard (G/ SY.). The paving fabric should be uniformly saturated. The amount of paving asphalt used will be determined by the engineer depending upon the estimated absorption of the asphalt into the surface due to the relative percentage of existing cracks, macro texture and estimated porosity of the pavement. If the paving fabric is not uniformly saturated with the asphalt cement after rolling, the chip seal binder application rate should be increased, as directed by the specifying engineer, to provide enough residual asphalt to saturate the paving fabric without reducing the amount of binder available for the chip seal. If fabric is to be placed by a tractor in lieu of the asphalt spreader truck, add.05 G/SY to the spread rate. The fabric shall be immediately rolled using pneumatic rollers weighing at least 8 tons at a speed not to exceed 5 mph until completely embedded into the oil. This may take several passes depending on ambient temperatures Page 9 of 20

13 4. The paving fabric shall be placed onto the asphalt cement with a minimum of wrinkles before the asphalt can cool or lose its tackiness. The paving fabric shall be placed so that the non-heat treated (bearded or fuzzy) side is placed downward, into the sealant, thus providing optimum bond between fabric and pavement during the construction process. As directed by the Engineer, wrinkles severe enough to cause folds shall be slit and laid flat in the direction of paving operations. Brooming the paving fabric will assist it in making intimate contact with the pavement surface. 5. The fabric will be removed from each utility cover plus twelve additional inches all around to allow transition for the chips to lap the fabric edges and connect to the utility. The first layer of chips and binder shall overlap the fabric but remain at least six inches away from the utility. When specified, the second layer of chips shall be placed against the edges of the utility cover. All protective material shall be removed and the covers exposed at the completion of the chip seal. 6. The fabric may be sanded using dry sand applied at a rate of 3 to 5 lbs/sy during rolling or a parting agent may be used on the roller tires. Sanding is mandatory prior to allowing any public traffic on the fabric. Any areas where the binder surfaces excessively through the fabric shall be blotted with sand and pneumatically rolled. This sand shall remain in place until immediately prior to the application of binder for the chips. All loose sand must be swept clean prior this application. Excess pieces of fabric not attached to the binder shall be trimmed off. 7. Longitudinal joints shall be lapped one to three inches with the asphalt cement tack coat extending another 1 to 3 inches beyond the fabric overlap. Transverse joints shall be butt joints with no overlap. Overlapping the fabric will not be permitted in butt joints. Fabric shall be placed within six inches of all edges of pavement abutting concrete gutters unless otherwise directed by the engineer. 7. Minimum air and ground temperature for fabric installation is 60 degrees F and rising. Binder shall not be placed on wet or damp pavement and shall be applied at a temperature of not less than 285 degrees F and not more than 325 degrees F. D. PRODUCTION START-UP PROCEDURES/TEST SECTION Page 10 of 20

14 1. Before full production, conduct a pre-chip seal preparatory phase meeting. On the first day of chip seal placement, construct a test section up to 200- to 500-foot [60 to 150-meter] long or less as approved by the ENGINEER for each type of surface upon which the chip seal is to be placed to establish the following: a. Rates of emulsion and aggregate application to ensure aggregate embedment and coverage; b. Time Frames to complete each phase of the chip sealing operations to meet the requirements for opening the roadway to traffic; and c. Roller Pattern, roller type, and number of passes. Use the roller pattern and type determined as effective during test section placement for the remainder of the chip seal placement. Place another test section when changing roller type and pattern. 2. Construct the control strip using the material, lay-down procedures, and compaction procedures intended for the entire project. Repeat the control strip process until an acceptable control strip is produced. Cease production until the material and the control strip are evaluated and accepted. Acceptable control strips may remain in place and will be accepted as a part of the completed project. Do not continue chip sealing operations until the test section has been in place for 24 hours or as approved by the ENGINEER. 3. Correct unacceptable control strips. Use these start-up procedures when changing construction procedures, when resuming production after a termination of production due to unsatisfactory quality, or the beginning of a new construction season. E. EMULSIFIED ASPHALT APPLICATION 1. For all courses, asphalt binder shall not be applied until the surface has been cleaned as required and the section approved by the ENGINEER. All loose materials shall be removed prior to emulsion application. Minimum air and ground temperatures for the placement of the chip seal shall be in accordance with these Specifications. 2. Calibrate asphalt distributors before the start of project and when directed by the ENGINEER. Calibrate the spray bar height, check Page 11 of 20

15 nozzle angle, and verify longitudinal and transverse application rates according to ASTM D Use a strip of building paper 3 feet [1 m] wide to form a uniform edge at the beginning of each spread. Spread building paper on the pavement surface at the beginning and end of each asphalt application so distributor flow is started and stopped on the paper. Make junctions of spreads to ensure a smooth riding surface. 4. Apply the emulsified asphalt and when specified, overshoot, in accordance with the supplier s recommendations. Apply the emulsion binder and, if specified, the overshoot seal emulsion at the rate shown on the plans. Determine the exact application rates based on approved control test strip(s). The application of the emulsion over the asphalt surface shall be performed by means of a pressure distributor uniformly at the optimum application rate determined from the control strip. Correct deficiencies and areas not covered. Skipped areas shall be corrected by hand spray. The application of asphalt binder shall not precede the application of seal coat aggregate by more than 100 feet [30 metres]. Do not apply more asphalt than can immediately be covered with aggregate. If the texture of the surface allows the emulsified asphalt to penetrate too rapidly, spray the roadway again at a rate specified by the engineer. Avoid delays that could impair retention of the aggregate. The temperature of the emulsion shall be in accordance with Table below. Ensure that longitudinal joints coincide with the specified locations of lane lines, edge lines, or the center of traveled ways. Rapid, Quick Emulsions Page 12 of 20 Table Emulsion Application Temperature Spray Application Temperature Range o F [ o C] Set Grade Unmodified Polymer Modified Medium, Slow RS-1 CQS-1h RS-2, HFRS-1, CRS-1,-2 MS-1, HFMS-1, SS-1, -1h CSS-1, -1h MS-2, HFMS-2, -2h CMS-2, -2h 70 to 140 [20 to 60] 150 to 185 [60 to 85] 70 to 160 [20 to 70] 90 to 185 [30 to 85] 70 to 140 [25 to 60] 160 to 185 [70 to 85] 80 to 160 [25 to 70] 100 to 185 [35 to 85] Note: All emulsions must confirm to the WYDOT (Version 2010) specification Table

16 5. The distributor shall be moving forward at the proper application speed at the time the spray bar is opened. If at any time a nozzle becomes clogged or not spraying a proper pattern, the operation shall be immediately halted until repairs are made. Repairs shall be made immediately after deficiencies are noted and prior to the aggregate placement at all times during construction. 6. The width of the emulsion application shall be no greater than the width of the aggregate spreader except where additional passes are required then the emulsion shall be four inches beyond the aggregate spread at a fifty percent application rate. At no time shall the emulsion be allowed to break, chill, setup, harden, or otherwise impair the aggregate retention before the aggregate has been properly applied and rolled. Asphalt binder shall not be spilled, sprayed or tracked on completed sections of seal coat. Remove and dispose of material spills and associated debris at the end of each shift. 7. Provide a daily log of usage of emulsified asphalt, including documentation of the calibrations and application rates. Submit the log to the ENGINEER no later than the working day following placement. 8. When Fabric is specified, the first chip seal application shall be performed within 72 hours of the placement of the fabric. This emulsion shall be applied at the rate determined from the test strip over the paving fabric, depending on the relative success of complete saturation of the fabric into the paving asphalt (fabric inadequately saturated will need more binder) and the nominal height of the chips used. If the surface temperature is warm enough to cause sticking of the fabric to the tires of the distributor truck, a parting agent may be used on the tires, or, alternatively, an application of 2 to 4 pounds per square yard (lbs. /SY) of 3/8x#6 chips may be placed on the fabric prior to the application of the emulsion. These chips need not be swept off prior to the emulsion application if the chips are evenly placed and kept within this range of coverage. 9. When required by the specifications, the second chip seal shall be placed within 48 hours of the first chip seal. The same emulsion used on the first application will be applied at a rate of 22 to 40 pounds per square yard (12 to 22 kilograms per meter squared). 10. When specified, apply an overshoot after placing the chip seal coat and initial brooming. When using a rapid set emulsion for the overshoot, the material should be diluted by the emulsified asphalt Page 13 of 20

17 supplier at its facility. Overshoot the chip seal at the rate established during the test section production. Do not allow traffic on the surface until the overshoot has sufficiently cured to prevent picking up or tracking. Cover excess quantities with blotter material. 11. The distributor, when not spreading, shall be parked so that the spray bar or mechanism will not drip bituminous materials on any surface. F. AGGREGATE APPLICATION 1. The Contractor, prior to start of work, shall calibrate the aggregate spreader to achieve the design application rate of the cover coat aggregate. Calibrate the longitudinal and transverse spread rates. 2. If necessary, wet the aggregate to eliminate or reduce the dust coating or to improve cohesion. Moistening shall be done the day before the use of aggregates. 3. The application of emulsion shall be followed immediately with the applicable course of aggregate, of the designation and class shown on the plans. Apply the aggregate at a rate of 22 to 40 pounds per square yard (12 to 22 kilograms per meter squared). Determine the exact application rates based on approved control test strip(s). It shall be uniformly spread by means of an approved mechanical spreader. Apply aggregate uniformly at the optimum application rate determined from the approved control strip. Spreading shall be accomplished in such a manner that the tires of the trucks and aggregate spreader never contact the newly applied bituminous material. The width of the aggregate spreader shall be equal to the width of the emulsion spread, except where additional passes are required. For part-width construction, leave an uncovered 6-inch (150-millimeter) wide asphalt strip to permit an overlap of asphalt material. Correct excesses and deficiencies by adding or removing aggregate to achieve a uniform texture before the asphalt cures. Cover excess asphalt with blotter to protect traffic 4. Immediately after the aggregate course is spread, pneumatic tired rollers shall be used to set the chips. A minimum of three coverage s will be required at a maximum roller speed of 5 mph. Sufficient rollers shall be used to complete these required coverage s within one hour of placement of emulsion. Do not allow the aggregate to be displaced by pickup or sticking of material to the tire surface. Roll the surface to uniformly and thoroughly bond the aggregate over the full width. Complete Page 14 of 20

18 rolling within 1 hour after asphalt is applied to the surface. Do not allow traffic to travel over aggregate until rolling is completed. 5. At the end of each day s production, provide the Engineer with documentation for calibrations and application rates. 6. When required by the specifications, the second chip seal shall be placed within 48 hours of the first chip seal. Excessive loose chips will be swept off prior to the application of the emulsion unless the second seal is placed on the same day as the first seal. In this instance, excessive amounts of loose chips shall be removed using vacuum sweepers or air blowers only. Kick brooms and/or gutter brooms shall not be used in this instance. If the first application of chips is damaged (removed) from sweeping, it shall be repaired prior to the second application. The same emulsion used on the first application will be applied. Apply the aggregate at a rate of 12 to 20 pounds per square yard (6 to 11 kilograms per meter squared). Determine the exact application rates based on approved control test strip(s). Rolling shall proceed as described above. G. ROLLING 1. Rolling shall begin immediately after the application of chip seal aggregate. Rollers shall work in tandem and complete a minimum of three (3) passes with a sufficient overlap should be completed over the entire treated area until a smooth, thoroughly compacted surface has been obtained. Rolling should be completed within ¼ hour of chip placement. Do not allow the aggregate to be displaced by pickup on the roller tires. Should the rolling operation be delayed, the aggregate and emulsion spreading shall be halted until the operation regains proper sequencing and timing. Rollers shall be operated at a speed that will not displace aggregate. Do not allow traffic to travel over aggregate until rolling is completed. H. BROOMING 1. Initial Brooming. Between the time period of 4 hours and 6 hours after rolling of each course has been completed or after the initial set of the asphalt, the surface shall be broomed to remove any remaining loose aggregate. Remove excess aggregate. Do not remove imbedded aggregate. 2. Final Brooming. The Contractor shall continue to broom the surface to remove any loose aggregate when required, and as often as required, during a two week period following the final Page 15 of 20

19 application or as directed by the ENGINEER. All intersections municipal roads shall be swept clear of loose aggregate. The Contractor shall use a pickup broom for all brooming in urban and other areas where loose aggregate cannot be swept onto sideslopes or onto ditches. 3. Finishing. a. Loose Gravel signs will be required at the beginning of the work at every entrance. b. Within 24 hours of curing, excess aggregate shall be swept from the roadway and adjacent areas. Excess aggregate that is clean may be stockpiled and re-used in subsequent locations at the discretion of the ENGINEER c. A final sweep removing all loose chips shall take place between one and two weeks following the chip seal, depending on an adequate amount of traffic use to complete chip orientation to their final resting position. Sweeping shall be done after chip seal has properly cured, and care will be taken not to dislodge imbedded aggregate or damage the surface. Steel brooms will not be permitted for sweeping on the finished chip seal. d. Remove signs after the final sweep. I. REPAIR OF IMPROPERLY COVERED AREAS 1. Any areas of either course that have not been properly covered after brooming, shall be treated using hand methods if necessary. J. DOUBLE COURSE CHIP SEAL 1. Apply each asphalt and aggregate layer according to Subsections 3.02.F and 3.02.G. Determine the exact application rates based on approved control test strip(s). When using emulsified asphalt, wait at least 24 hours between applications. When using asphalt binder, no wait is required between applications. Lightly vacuum sweep the first layer to remove loose material. K. TRAFFIC ACCOMMODATIONS AND SIGNING 1. Traffic control is the sole responsibility of the Contractor. A traffic control plan approved by ENGINEER will be required before any Page 16 of 20

20 work commences. The Contractor shall erect and maintain temporary construction signs in accordance with the Traffic Accommodation in Work Zones manual. A Traffic Accommodation Strategy be required for all phases of construction. 2. Unless otherwise specified, the roadway shall be kept open to traffic at all times, with traffic discontinued on the lane being surface treated. The Contractor shall, at his own expense, provide flagmen, pilot vehicles and/or illuminated arrow boards as required. Traffic and construction equipment including aggregate haul trucks shall not travel over uncovered surfaces of fresh asphalt binder. Traffic shall not use the sections of seal coat until after rolling is complete. Traffic convoy, at speeds not exceeding 30 [50 km] per hour, shall commence at the start of seal coat application and shall continue up to six hours after all rolling has been completed as directed by the Consultant. 3. Open roadways as follows: b. Chip Seal With Overshoot. Apply overshoot after a minimum of 24 hours to allow chip seal emulsion to fully cure and within 7 calendar days after chip placement. Do not allow traffic on the chip sealed surface until the blotter is applied and the overshoot has cured. L. INTERIM LANE MARKING 1. The Contractor shall provide interim raised pavement markers or painted lane markings on all newly constructed surfaces once sufficient brooming has been complete, or on tacked surfaces that are to be exposed to traffic overnight. All paint spots shall be 100 mm wide and 300 mm long, shall be applied lengthwise to the road surface, shall be spaced a minimum of 40 foot (15 meter) apart on center in tangent sections and 25 foot (7.5 meter) apart on curves, shall employ the same paint color as the permanent marking and shall be completely covered with glass beads at the time of painting. M. PUBLIC NOTIFICATION 1. The Contractor shall distribute an approved information flyer to all residents adjacent to the project no more than two weeks prior to the anticipated start of construction. A local telephone number will be located on the flyer and manned 24/7 until the contract is Page 17 of 20

21 3.03 PROTECTION completed. No parks are to be provided by the contractor hours prior to the commencement of the work. The cost of public notification shall be included in the unit price of the Chip Seal. A. Areas where bituminous materials would be picked up, or the seal otherwise damaged by traffic, shall be covered by a protective coat of sand. When confined to small areas, the sand coat may be applied by hand spreading and smoothed by sweeping. B. The Contractor shall ensure that all manhole covers, valve boxes, drop inlets, catch basins, curbs and any other structures and appurtenances adjacent to the work are protected from asphalt and/or aggregate contamination. All existing utility appurtenances shall be covered with a protective material prior to the application of any bituminous material REQUIREMENTS FOR ACCEPTANCE A. Requirements for the acceptance of the completed Chip Seal or Double Seal Coat include the following: 1. Materials shall meet all specified requirements; 2. A minimum of 99% chip coverage shall be obtained with no single bare area greater than 0.01 m2 in any one square metre; 3. There shall be no streaking or ravelling; 4. The finished surface shall have a uniform, even texture; 5. No over-rich or bleeding areas shall be evident; 6. No loose aggregate shall be evident. B. If a chip seal ordouble chip sealexperiences chip loss or bleeding within two weeks of placement, shall be repaired or reconstructed to the satisfaction of the ENGINEER. Provide and maintain temporary traffic control required on the project to repair areas of failing seal coat at no additional cost to the CITY PERFORMANCE A. The CITY will not award this contract unless the Contractor furnished satisfactory evidence of his/her ability and experience to perform this work, and that he/she has sufficient capital and equipment to enable Page 18 of 20

22 him/her to prosecute the work successfully and to complete it within the time named in the contract. As part of the bid, the Contractor must submit a list of six similar and successfully completed jobs, whose relevance to the proposed job shall be deemed by the awarding authority. The name, address, and telephone number of a contact person involved with each of these projects must be included so they can be investigated prior to the award of the contract. PART 4 METHOD OF MEASUREMENT AND BASIS OF PAYMENT 4.01 METHOD OF MEASUREMENT A. Chip Seal with Overshoot and Double Chip Seal with Overshoot including aggregate and emulsified asphalt for binder and overshoot shall be measured by the square yard [square meter], based on the length placed and the lessor of the measured or specified width placed. Quantities of water to dilute the emulsified asphalt for application will not be measured and paid for. B. Asphalt Patching shall be measured by the square yard [square meter] based on the length and width placed, including 4 of new asphalt concrete. C. Additional Asphalt Patching shall be measured by the square yard/inch [square meter/cm] placed based on the length, width and depth placed, for asphalt concrete exceeding the 4 depth in Item B above. D. Paving Fabric including paving asphalt shall be measured by the square yard [square meter], based on the length placed and the lessor of the measured or specified width placed BASIS OF PAYMENT A. The accepted quantities of Chip Seal shall be paid for at the contract price per the unit of measurement for the pay items listed in the bid schedule. B. Payment shall be made under: Pay Item Chip Seal with Overshoot Double Chip Seal with Overshoot Asphalt Patch Additional Asphalt Patch Paving Fabric Pay Unit SY SY SY SY/IN SY Page 19 of 20

23 END OF SECTION Page 20 of 20

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25 S Chip Seal, Part 2 Planholders List Date Company Name Contact Name Address Phone Number Address 7/20/17 Knife River Cameron Dustin 4875 S. Industrial Service Rd cameron.dustin@kniferiver.com 7/20/17 BOPU David Cole dcole@cheyennebopu.org Geotec Industrial 600 Bear Pen Road, Kody Pivik 7/20/17 Supply Casper,WY (307) sales@geotecsupply.com 7/20/17 Ayres Associates Darci Hendon ext hendond@ayresassociates.com 7/20/17 Wyoming Plan Service Caroline 104 S. Wolcott Ste 861 (307) helpwpswy@outlook.com 7/20/17 IDAHO AGC Kylie M (509) agc@idahoagc.org 7/20/17 Prime Vendor Bid Clerk (8007) ranju@prime-vendor.com 7/20/17 bid ocean eric po box eric@bidocean.com 7/21/17 Bidnet Kurt Pitzer 15 Britis American Blvd Latham NY (800) gbs@bidnet.com Western States Evan Henninger 4511 S Industrial Road 7/21/17 Asphalt (307) ehenninger@wsasphalt.com 7/21/17 engineering associates karl smith 211 n first street karl@eaengineers.com 7/21/17 deltek chino BidsInbound@deltek.com 7/24/17 4 Quarters Excavation Heather Fauber (307) hfauber@4qexcavation.com 7/24/17 ConstructConnect Kara Pierson 3825 Edwards Rd x 8041 Kara.Pierson@constructconnect.com 7/24/17 Simon Contractors Steve Bastian 4819 South Industrial sbastian@simoncontractors.com 7/27/17 City Nathan Nbeauheim@cheyennecity.org 7/27/17 Terracon Suchan Lamichhane 1505 Old Happy Jack Road suchan.lamichhane@terracon.com Billings Builders 2050 Broadwate Ave Luke Hudson 7/28/17 Exchange Suite A bbx@billingsplanroom.com 7/28/17 Terracon Suchan Lamichhane suchan.lamichhane@terracon.com