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Home My WebLink About109-83 RESOLUTION• RESOLUTION NO. 109-83 A RESOLUTION AUTHORIZING A CHANGE ORDER IN THE CITY'S CONTRACT WITH BRAUN EXCAVATING COMPANY FOR SANITARY SEWER SYSTEM REHABILITATION AND RECONSTRUCTION TO PROVIDE FOR THE REROUTING OF A SEWER LINE SFGMFNT AT EASTC.,LAFAYETTE STREET AND'DOGWOOD LANE. 4 4 BE IT RESOLVED BY THE BOARD OF DIRECTORS OF THE CITY OF FAYETTEVILLE, ARKANSA•S: ' •• That the Mayor and City 'Clerk are hereby authorized and directed to execute the' change order.'attached hereto, marked .-Exhibit ',A" and made a part hereof. PASSED AND APPROVED this 20th day of September , 1983. r. M=.f "t!k .j:Nx r• '. By: ST: • APPROVED: By:�/C1ea / giZtA Mayor Change Order No,..2 SANITARY SEWER SYSTEM REHABILITATION AND RECONSTRUCTION Minisystems 2, 4, 7, 8, 11 and 16 City of Fayetteville, Arkansas Plans No. Fy-116 Dated April, 1983 The contract dated June 29, 1983, between the City of Fayetteville, Arkansas, and Braun Excavating Company of Seymour, Missouri, is hereby changed as follows: 1. Change the alignmentand grade on Segment 2-9 from that shown on the original plans to the alignment and grade shown on the attached plan and profile (Attachment No. 1). 2. Construct two new manholes at the locations and to the depths shown on the attached plan and profile. The manhole specification is attached (Attachment No. 2). Manholes 2/3/1 and PS6/Creek/1 (Mainlines Requiring Plugging of Overflows - Rehab Code 1) are hereby deleted from the contract. 4. Provide and place native stone riprap an aid to erosion control as required at the unit price set out below for Engineer to be hauled in and placed. along Segments 16-2, 2-2 and 2-4 as Payment for this item will be made native stone as required by the 5. The contract shall be extended six (6) calendar days,changing the date of completion of construction to October 17, 1983. 6. Change estimated quantities for Bid Items No. 2, 10, 18 and 19 and add Bid Items No. 25 (construct new manhole 0'-6' in depth) and 26 (native stone riprap) to the contract as follows: Bid Item No. 2. ADD 12 L.F. 6" Ductile Iron Pipe Sewer @ $21.58/L.F. ... 10. DEDUCT 2 Each Plug Sewer Overflow or Bypass Line @ $53.30/Each 18. ADD 15 Tons SB -2 Crushed Stone Backfill @ $9-.00/Ton 19. ADD 60 S.Y. HMAC Pavement Repair @ $27.00/S.Y. 25. ADD 2 Each Manholes 0'-6' @ $700.00/Ea 26. ADD 90 S.Y. Native Stone Riprap @ $13.50/S.Y Net Addition, This Change Order $ 258.96 (106.60) 135.00 1,620.00 1,400.00 1,215.00 $ 4,522.36 Total Contract Price, Including Change Orders No. EXHIBIT A 1 and No. 2 $206,266.06 All other provisions of the contract remain in force. Approved this T / R.k day of `-S7" "`.k..l , 1983. ENGINEER: McGoodwin, Williams and Yates, Inc. Jer chards Pro3 nager lir CONTRACTOR: Braun Excavating Company, Inc. d Braun 'resident APPROVED: City of Fayetteville, Arkansas .01kwaie Donald R., Bunn, City Engineer e) — PFW bhp, M ,. tfi;:i , \ f 2e'ut h;A • o+27-Cot417T. i pew MAUHOLb Gxicir I5° RGP �� u�v�6r_P OT x eKI°Tr, 1.4-1 2/140 5T3, 2+00 TI E 5/1. 4c ;xl'ir. Mi. 7 5ECMEMT ?-c, 4414-e I" F:K. FY, 1o1 f2(4`.7. 7.33 STh • I+02 -COW•411 �? N MANHOLE.: .17 -rt r7"Dt,P � C�nl=k ` ,- C #- I Jr -4. 10 0 .._ - .. Oho__ ______- IO 100 400 t00 McGoodwin, Williams and Yates, Inc. Consulting Engineers nLLacl,menC NO. G Section 150 Manholes CAST -IN-PLACE MANHOLES 150-A. GENERAL. The work to be included under this section of the specifications shall consist of providing all materials, labor, equipment, tools, supplies, and incidentals necessary for the construction of standard and drop cast -in-place manholes. The work shall include every item of construction necessary for a complete and acceptable installation as shown on the Plans and hereinafter specified. Precast, brick, masonry, or vitrified clay radial block manholes are not approved for use on this project. 150-B. MATERIALS. 1. Concrete. Concrete used in the construction of standard and drop cast -in-place manholes shall be in conformance with the Concrete Section of these. Specifications. 2. Mortar and Grout. Mortar or grout used in the construction of manholes shall be mixed in the proportion of one part of Portland cement and two parts mortar sand as defined in the Concrete Section of these Specifications. The mixture shall be dry -mixed until it has a uniform color, after which water shall be added or the mixing continues until the mortar has a consistency such that it can be easily handled and spread with a trowel. Mortar or grout that has not been used within 30 minutes after water has been added shall not be used. 3. Manhole Rings and Lids. All castings for manhole frames, covers and other purposes must be of tough gray iron, free from cracks, holes, swells and cold shuts, shall be of workmanlike finish, and shall conform to the Plans. The quality shall be such that a blow from a hammer will produce an indentation on a rectangular edge of the casting without flaking the metal. Before leaving the foundry, all castings shall be thoroughly cleaned and subjected to a hammer inspection. Manhole rings and lids shall have a combined weight of not less than 350 pounds and shall be in accordance with the dimensions shown on the Plans. The manhole lids shall be of solid construction without any openings of_any type except two pick holes which shall be located on directly opposite sides of the manhole lid. The pick holes shall be of such design that when the lid is in place, there is not a clear opening into the manhole. Manholes Steps. Steps shall be 10 inches wide and shall be constructed of steel reinforced fiberglass. Manhole steps shall be equal and similar in design to Perma-Step Model 100-2 as manufactured by Utility Products, Inc., or equal. 150-C. MANHOLE CONSTRUCTION. 1. Excavation for Manholes. Excavation for manholes will be made of such dimension and depth as to allow the construction of the manhole as 150-1 • • nL LeleautLL P40. L Section 150 Manholes shown on the Plans. No extra payment shall be made for manhole excavation, and all surface removal shall be in accordance with Section 095 of these Specifications. 2. Base. The concrete base shall have a minimum thickness of 8 inches and shall be poured on undisturbed earth. The base shall be poured so that the top of the base is a minimum of 2 inches and a maximum of 4 inches below the lowest pipe inside the manhole, except when the lowest pipe can be laid continuously through the manhole, the base may be poured to a point 2 inches below the centerline of the pipe, providing this point is not above invert of other pipes entering the manhole. The base shall have a minimum diameter of 8 inches greater than the outside diameter of the finished manhole barrel. 3. Connections to Manholes. Pipe connections to manholes are a constant source of potential trouble. In order to ensure that pipe will not break immediately adjacent to the manhole, care shall be taken that excavation for the manhole bottom is limited to the area to be filled with concrete. The Contractor shall support pipe entering the manhole ALL OF THE WAY to solid bedding by backfilling under the pipe and up to mid-springline with concrete. 4. Invert. The invert of the manhole shall be hand -placed and shaped using grout as specified. The base and barrel of the manhole shall be cleaned thoroughly prior to placement of the invert. The invert shall be shaped and smoothed so that the manhole will be self-cleaning and free of areas where solids may be deposited as sewage flows through the manhole. The entire diameter of each pipe entering the manhole barrel shall be cut smooth with the inside edge of the manhole barrel and the invert shaped throughout from all inlet pipes to the outlet pipe. 5. Manhole Barrels. The barrel forms may be set as soon as the concrete base has cured enough to support the forms. The manhole barrel shall be of such construction so that the finished manhole will have an inside diameter of 4 feet 0 inches, plus or minus one-half inch. Prior to setting the forms in place, any water that may have accumulated in the excavated area shall be pumped out and the concrete base thoroughly cleaned, if required, of dirt and debris. Before pouring of the concrete begins, a 2 inch layer of grout mixture shall be placed in the bottom of the forms. The forms shall be removedafter the initial set of the concrete so that holes may be cut in the manhole barrel for the installation of pipes which are to enter the manhole at points other than adjacent to the manhole base. After these pipes have been put in place, the barrel shall be repaired using a grout mixture. If honeycombing of the barrel is found to be present after removal of the forms, they shall be repaired as directed by the Engineer. 150-2 nLLOCIWltllll. INU. G• Section 150 Manholes 6. Manhole Steps. Manhole steps are required in all manholes 4 feet deep or more. During the construction of each manhole, steps shall be set in place on the inside of the manhole, beginning 2 feet above the bottom and placed not more than 18 inches below the top of the manhole. These steps areto be built to the dimensions shown on the Plans. The ends shall be firmly built into the wall, allowing the steps to project 5 inches from the inside of the manhole. 7.. Manhole Heights. Manholes are to be built to the existing ground, surface unless otherwise noted on the Plans or directed by the Engineer. When manholes are constructed in streets, the top of the poured manhole shall be left at such an elevation so that two rings of standard brick are required to bring the manhole ring to the finished elevation. A 3 inch wide by 2: inch deep keyway shall be left in the top of the poured manhole to hold the mortar for the first ring of bricks. All brick or block shall have full mortar joints on the bottom and sides. Every joint shall be formed at one operation by placing sufficient mortar on the bed and forcing the brick or block into it. Horizontal joints shall not exceed 3/8 inch and the vertical points on the inside of the manhole shall not exceed 1/4 inch. The brick shall be plastered on both the inside and outside with 1/2 inch of cement mortar. The plaster shall be smoothly laid, and on the inside of the manhole all rough projections shall be removed. Details for the construction of manholes are shown on the standard detail sheet of the Plans. 8. Drop Manholes. Drop manholes, unless otherwise shown on the Plans, shall be constructed at all manholes where the difference in invert elevation between incoming and outgoingsewer is 2.5 feet or more. Drop manholes shall be constructed of the same material and dimensions as are standard manholes, the only difference being in the inlet arrangements as shown on the standard detail sheet. Curing. Curing compounds or covers may or may 'not be used at the option of the Contractor. However, it will be the responsibility of the Contractor to protect the concrete to prevent cracking during the curing process and to protect the manhole during freezing temperatures. The Engineer shall, at hisdiscretion, prohibit pouring concrete during periods of extreme cold or inclement weather. 10. Backfilling. The manhole shall be backfilled evenly around its perimeter no less than 12 hours after the forms have been removed. Extra care shall be taken to compact all .backfill to the top of the highest pipe entering the manhole. All backfilling shall be in accordance with Section 146 of these Specifications.. 150-3