Full Text
May 27, 2014 Park St Water Main Replacement Bid No. 2014-022 Bid Date: 6/10/14 ADDENDUM NO 1 Please make the following changes to the Specifications: ADD attached Pre-Bid Meeting Minutes END Department of Public Works • 103 Adams Ave • Lewiston, ME • 04240 • Voice Tel. [PHONE REDACTED] • Fax [PHONE REDACTED] • TTY/TDD [PHONE REDACTED] – www.lewistonmaine.gov Department of Public Works David A. Jones, P.E. Director ---PAGE BREAK--- 1 Date: 5/21/14 Park St Water Main Replacement, Bid 2014-022 Mandatory Pre-Bid Meeting Time & Location: Lewiston Public Works, 10:00 AM Name Title Company Tel. FAX E-Mail Jeff Beaule Project Engineer Lewiston 513-3003 784-5647 [EMAIL REDACTED] Adam Longchamps Longchamps 353-2349 353-5841 [EMAIL REDACTED] John Gendron V.P. Gendron & Gendron 782-7372 782-7308 [EMAIL REDACTED] Steve Piela Estimator Glidden 856-9990 856-9998 [EMAIL REDACTED] Bruce Britton W. Walsh Co. [PHONE REDACTED] [PHONE REDACTED] [EMAIL REDACTED] Bill Haines Dir. of Engineering Vari-Tech LLC [PHONE REDACTED] [PHONE REDACTED] [EMAIL REDACTED] Bob Pelletier Sales EJ Prescott 632-0385 [EMAIL REDACTED] Ryan Barnes Project Eng. Lewiston 513-3003 784-5647 [EMAIL REDACTED] Gary St. Laurent Owner St. Laurent & Sons 784-7944 784-6592 [EMAIL REDACTED] Shawn Thibodeau Operations Ted Berry Co. 897-3348 897-3627 [EMAIL REDACTED] [EMAIL REDACTED] Butch Boucher Capt. Proj. Sup. Lewiston W&S 513-3003 784-0376 [EMAIL REDACTED] Ray Poirier President LP Poirier 782-3617 777-3911 [EMAIL REDACTED] Lauren Shaw Admin. Asst. Lewiston 513-3003 784-5647 [EMAIL REDACTED] Project Engineer: Jeff Beaule 1. Introductions 2. Overall scope Pipebursting was chosen for speed and due to existing utilities in the street to cross. Fusible PVC was chosen over HDPE for minimal wall thickness and DIPS in order to make future repairs and connections with MJ fittings, and to lessen the impact to businesses along the project route. There is a 10” existing pipe which is approximately 100 years old. 1550 LF PVC in 4 separate pulls 260 LF Chestnut 310 LF 6” services/hydrant leads 1350 LF 6” temporary main, a few smaller service connections Most lines to buildings are 6” – some with sprinkler systems. Fire protection connections must be supplied to various buildings during project. The City will supply all permanent materials, except PVC. City will supply 2” poly main for Chestnut. Contractor to supply all temporary materials and fittings ---PAGE BREAK--- 2 3. Sequence of Construction The project includes 4 sections. Install pipe/pits as necessary for connection of temporary mains. The 4 sections may be broken up however the contractor would like. Services are to be replaced to back of walk except as noted. The layout allows fusing of pipes without blocking intersections and side streets. Main Street: Currently has 24” cast iron that has been cleaned and lines, but is 120 years old. The 8” ductile iron crossing Main St will be connected with a 24x8 tapping sleeve. Install a 24” tapping sleeve, cap 10” and we will shut down the 24”. Work will have to be done on Sunday when the least amount of traffic flows through the area. One lane of traffic can be closed after 9:00 a.m. to prep and pave. Park Street: in 2000, new sewer and storm pipes were put in. Some sewer and gas services have been abandoned in the middle. Temporaries to be run from the pits at each end with no services in the middle of the block. There is one point that runs through an old, brick telephone manhole. Fairpoint is willing to work with the contractor in this area, and try to pull wires out of the ay as much as possible. The plan is to dig a pit on each side of this manhole, remove the cast iron pipe, chip out more bricks, and then pull new pvc through where the old line was. If possible, a contractor can pull the 8” pipe through that short section without removing the cast iron main. However, it is believed that there is only about 5 ½” of clearance in existing pipe. The new pipe cannot be pulled through the old along the entire project in case of leaks later. There will most likely be a Fairpoint representative on site at the manhole while work is being done there. There is also a question of the integrity of the wall around that manhole. After connections are made at the manhole, it is preferred that brick and mortar be rebuilt around the pipe, rather than poured concrete. Contractor to install tapping sleeves, City will do the tap. There is an 8” on Ash and a 10” on Park. Cut and cap at intersection pit just past Ash – keep previous block live. There is also a gas line in the area of the pit that may need to be cut out temporarily. Post Office services are on Ash St. If services are found on Park St., then they are abandoned. Sewer services appear to be run through the alley, so they should not be in the way. Maintain as much parking as possible for City hall. Also, a lane of traffic must be maintained at all times on Park St. since it is a one-way street. No night work is to be done in the area of the retirement apartment building (Oak/Park). TEMPORARY MAIN: This will be a 6” main, material to be chosen by the contractor. A complete plan with layout, materials, valves, connection and feed details are to be submitted for approval. The contractor will have flexibility with suggesting a plan for temporaries as long as fire supply is maintained. Need to minimize potential for damage/vandalism and contractor is responsible for repairs 24 hrs/day. ---PAGE BREAK--- 3 Contractor is responsible for all temporary pipe and fittings to connect to the feed end and the services. He/she is also responsible for restraining the feed pipe/connections as necessary to prevent blowoffs. In the first section of Park St., there are retirement apartments with a 6” domestic and a 6” sprinkler line. The block between Oak and Ash is not being done. There is a gate just past Oak. Need to leave one end live at all times to run temps off of. For the 6” temporary main, the material is up to the contractor. The contractor must provide a plan of connections, feed, and materials. BURSTING: Details in Div 10 and 702. The pit locations shown were chosen to minimize traffic impacts and to maximize the connections that can be made in one pit. They are suggested but alternatives may be considered. This layout allows for fusing a whole block without crossing a side street. Qualifications apply to the operator of the pipebursting equipment, not necessarily the bidder. Pits: Pay item for pits includes excavation, backfill to subgrade, shoring, set up of equipment AND connections of the permanent main. PVC main and service/hydrant pipe within the pit will be paid under those items per LF. 8” or 12” DI main and fittings within the pit will not be paid separately. After pulling the main through and before testing, service tees need to be cut in. The plan is to use flanged tees with flange adapters so that there will be no unrestrained couplings on the new main. A tapping gate will be attached to the tee, MJ fittings from there on. Making a straight cut in the PVC will be critical. 702: This section contains the details on the fusible pvc and fusing requirements. This section has the submittal requirements for the pvc pipe and bursting plan (pre and post). The pipe has to be purchased from Underground Solutions and fused by someone certified by them. Chestnut St: 2” DR11 poly main is to be pulled through the 4” to Lisbon St. (not burst). There is only one service and a pit can be dug on the other side of Lisbon St, keeping Lisbon St. open to traffic. Utility crossings: Test pits need to be dug at all utility crossing locations. Known locations are shown on the plans but there may be more. These are to be excavated by potholing to minimize the time and size of the hole. The hole needs to stay open and plated to relieve pressure on the utility when the expander head goes by. Expect to find cobblestones under the pavement set in weak concrete. This layer may need to be broken up by jackhammer before vacuum excavation. Stones remain the property of the City. Holes to be backfilled with flowable fill under the utility. As far as we can tell, all sewer services go to the back alley. ---PAGE BREAK--- 4 Traffic: Need a detailed traffic plan, see spec for Main St. crossing. One lane on Park, Ash and Pine needs to stay open all the time. Some short closures may be allowed for some of the crossings on Park St., after business hours may be required depending on the location. Chestnut can be closed at one end or the other for the bursting operation. Need to let people get to Simones. Emergency vehicles must be able to get through. There is no plan for uniformed officers on Main St. Other: Division 10 and section 702 include the pipebursting specs. The locations chosen are to maximize the connection in the pit with the least impact to traffic. After pulling the main through, and before testing, the T’s need to be cut in. The City wants flange T’s used with a flange connector. Then attach tapping gate to the service side. The main will be flushed, tested, and chlorinated before it is connected to services. Section 702 includes the specs on fusible pvc, bursting plan, pre and post submittals, fusing plan and quality control results. Completion date is September 30, 2014. If any of the meeting participants feel that the above is not an accurate representation of what was discussed at the meeting, they should contact Jeff Beaule, Project Engineer at 513-3003, Ext. 3416.