'West Ramp' Parking Lot Repair

9. SCOPE OF WORK. The Big Bear Municipal Water District is requesting bids from qualified companies for a parking lot repair project consisting of the following: SITE: Duane Boyer- West Ramp Parking Lot Repair- 38925 North Shore Drive, Fawnskin, CA 92333: The Big Bear Municipal Water District is requesting proposals from qualified firms for new asphalt, asphalt repair and replacement (where necessary) and repair of damaged curbs, improve drainage to flow west, seal, and stripe services (“Services”), which shall be provided under the general direction of the General Manager or his or her designee. The following describes the specific scope of services as it relates to each task. The District is currently seeking to improve and repair the West Ramp parking lot and driveways by performing the work detailed below. Facility map and striping layout can be seen on our website at https://www.bbmwd.com/requests-for-proposals-environmental-notices-projects . Site Preparation for Cracks 1. Site preparation requirements vary according to the sealing or filling method and materials chosen for the project. The following describes site preparation in further detail. a) When routing or sawing is incorporated, cracks need to be cleaned and dried prior to application of the filler or sealant. When pavements are cracked extensively, routing or sawing of cracks may not be appropriate. Crack cutting becomes especially important in climates where crack movement is very high. Crack cutting allows more filler to be used and provides better control of the crack channel shape. Secondary cracks along the primary crack are not usually routed. Routing is generally not used in HMA or PCC pavements in California. Crack cutting and routing equipment includes vertical spindle routers, rotary impact routers, and random crack saws. Damage to the pavement should be kept to a minimum by clean cutting. The use of carbide bits improves the quality of cutting and typically produces clean reservoir cuts. The following methods should be followed based on crack size defined below: i. Cracks 1/8 to ¼ inch shall be flush filled; 3350’ estimated. ii. Cracks ¼ to 1 inch shall be filled using a combination reservoir with Band- Aid fill method. Backer Rods or sand fill may need to be used on larger deep cracks (where necessary). 6700’ estimated. iii. Cracks larger than 1 inch shall be repaired using the method of ‘open v-shape cuts’ 24” x 4” deep and repave with hot mix asphalt. 100’ estimated. b) Debris left in a crack, resulting from sawing, routing, or pavement use will affect the adhesion of the sealant or filler. Debris also contaminates the sealing or filling material and reduces cohesion. Reduced adhesion or cohesion normally results in early failures. To avoid these contamination-related failures, sawed or routed cracks must be cleaned prior to being treated. Several cleaning methods can be used, including: 1. Air blasting 2. Hot air blasting 3. Sand blasting 4. Wire brushing a. Air blasting involves directing a concentrated stream of air into the crack or joint to blow it clean. Air blasting equipment is effective and efficient for cleaning cracks. Air blasting is not efficient for drying cracks. Should a crack require drying, hot air blasting should be used. Air pressure should be a minimum of 670 kPa (97 psi) with a flow of 0.07 m3 /s (2.5 ft3 /s). Air blasting equipment must be equipped with moisture and oil traps. Hot air blasting is done using a hot compressed air heat lance. While cleaning and drying the crack, hot air blasting also promotes enhanced bonding associated with the crack edges being warmed. Care must be taken to ensure that the pavement is not overheated or heated for excessive periods of time as this will result in unnecessary hardening of the asphalt binder in the pavement adjacent to the crack. b. Sand blasting involves directing a stream of sand entrained in compressed air into the crack. The abrasive nature of the sand cleans the crack or joint. Sandblasting, which is used for cleaning cracks in PCC pavements by many states, is an effective treatment. However, sandblasting is messy and typically requires a two-phase operation. The first operation is cleaning the joint surface; the second cleans the sand from the joint and its surroundings. On new PCC pavements, sand blasting is required to clean the surface prior to applying the sealant. c. Wire brushing or brooming involves the use of a wire broom stock or stiff standard broom to brush out the crack or joint. Wire brushing can be an effective cleaning method. Wire brushing may be done manually or using power driven brushes. 2. If the contractor should damage the edges of the specified area he/she will be required to expand the paving area at no expense to BBMWD. All edges of the specified repair shall be coated with SS1H tack oil. Asphalt must be finished to provide a smooth area. Finish paving must ride “smoothly” and to the satisfaction of the BBMWD representative. Existing edges of the specified areas are to remain free of all new asphalt. a. Power-edge all vegetation away from edges of asphalt. b. Thoroughly clean all asphalt areas to be seal coated so they are free of all dirt and debris. c. Block off work areas while conducting their work, the night before so staff of the district know where to park the following business day as to not disrupt the construction schedule. 3. Seal Coating a. Apply commercial grade asphalt tar emulsion or equivalent which meets or exceeds all the requirements of Federal Government Specification RP-355E along with 2-5 lbs. of sand per gallon of sealer along with a modified latex hardening agent. b. All seal coating work must be performed Monday through Friday ONLY 7AM – 6PM 4. Striping a. Restripe parking lot according to existing layout as seen on exhibits on https://www.bbmwd.com/requests-for-proposals-environmental-notices-projects , after sufficient curing time; minimum five (5) days, maximum thirty (30) days. b. Striping shall be two (2) coated commercial grade acrylic traffic paint in the existing striping on the lot. Approximately 60,160 sq. ft. Contractor to provide exact amounts in bid documents. c. All work must be performed Monday through Friday 7AM – 3:30PM. 5. New asphalt a. New asphalt to be in accordance with 2024 Greenbook section 203 practices including but not limited to; material, installation of aggregate base, tack coat, asphalt concrete pavement, seal coat, compaction, striping and markers. b. New asphalt grade to be returned to original elevation to address existing Cal-Trans culvert drainage issues which will need to be diverted to the west. c. Estimated new asphalt work 4,862 sq ft. Contractor to provide exact amounts in bid documents. 6. Tree Trimming & Removal a. Tree trimming will be required along the designated northwest perimeter of the parking lot; to include disposal. b. Removal of non-native trees will be required during the discard of the west island; to include disposal.