The Metropolitan Sewer District of Greater Cincinnati

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1 The Metropolitan Sewer District of Greater Cincinnati Dry Run Area Sewers, Phase 1 and Phase 2 Contract A, Project ID _ Date Issued: 03/25/2010 ADDENDUM NO. 2 This addendum will only be distributed via , but will remain available for viewing on the MSD website at on th e p roject-specific w eb p age. N o h ard c opy w ill fo llow. A ny questions you may have on the information contained in this addendum should be directed to the Project Manager, WWE at NOTE: Please be sure to enter the TOTAL NUMBER of Addenda issued on the Official Bid Form contained in the Bidding Booklet prior to submitting your bid. The attention of all bidders is directed to the following additions and/or deletions to the Contract Documents. ADDED ITEMS ARE UNDERLINED AND DELETED ITEMS ARE STRUCK THROUGH The Contract Documents for the above referenced project are amended and revised as follows: NOTE TO BIDDERS: Bidder MUST submit the bid on the Revised Proposal Bidding Sheets included in this Addendum as noted on Pages ) Detailed Provisions Detailed Provisions, section (Ref. Nos. 7 through 15 [7 through 12]) CONDUITS, STUBS, T- BRANCHES AND CLEANOUTS : CHANGE the 15 th paragraph: The Contractor may utilize an Inserta Tee connector, or equal, in lieu of prefabricated T-Branches for all conduits 21 diameter and greater, other than on Ductile Iron Pipe or Prestressed Concrete Cylinder Pipe. There is no guarantee that an equal is available. The cost for each connector, including all work incidental to its placement, shall be included in the price bid for Item 6 T-Branch of the size specified. Wye connections shall be made at all plastic mainline sewers in place of the T-Branch connection. The cost for six-inch bends, including all work, materials, and equipment incidental to its placement shall be included in the price bid for Item - 6 T-Branch of the size specified. Any caps required for laterals shall be included in this bid item. Page 1 of 4

2 Detailed Provisions, CHANGE the section title (Ref. No. 7 [7]) 6 CONDUIT, TYPE I, LATERALS Detailed Provisions, ADD section (Ref. No. 7a [7a]) 6 CONDUIT, TYPE I, STACKS : This item shall be constructed in accordance with Standard Drawing Acc. No , except as otherwise noted on the plans and in the specifications. Detailed Provisions, section (Ref. No. 9 through 12 [9 through 10]) CONDUIT LEAKAGE TEST : CHANGE the second paragraph: All mainline conduits thirty-six (36) inches and smaller shall be subjected to an air test. This test shall be performed in accordance with the latest ASTM or UNI-BELL PVC Pipe Association requirements for each unique pipe material in effect at the time that bids are submitted. Ductile iron pipe shall meet an air test requirement of 150 psi. Detailed Provisions, CHANGE the section title (Ref. No. 8 & 10 & 12A [8 & 9]) 42, 36, & 27, AND 6 CONDUIT, JACKING AND BORING ADD the following paragraph: Alternate Methods of Sewer Construction: For the 6 Conduit, Type I, Jack & Bore: Directional drilling method of installing highdensity polyethylene (HDPE) gravity sanitary sewer pipe, meeting the specifications below, will be permitted as an alternate to the Jack and Bore Method. The Contractor must ensure that there is no ponding in the lateral by flushing and TVing the line following c onstruction. The C ontractor sh all assu me al l r esponsibility for construction by the Directional drilling method of construction and shall be required to make all repairs, alterations, adjustments to line and grade, or to correct any defects in construction, workmanship, methods, or materials, at no additional cost to MSD. The Directional drilling alternate method will be paid for at the unit price bid for Jack and Bore. No additional payment will be paid for the Directional drilling method. Page 2 of 4

3 HDPE Pipe, shall be hi gher pe rformance, hi gh m olecular w eight, hi gh-density polyethylene pipe, and shall be a nominal DIPS (Ductile Iron Pipe Size). The pipe material shall be a Type III, Class C, Category 5, PE33 material as described in ASTM D Minimum cell classification values of the pipe material shall be ( C) as referenced in ASTM D The SDR shall be as sp ecified, with SDR 11 as a minimum. The fittings supplied under t his s pecification s hall be m olded f rom a polyethylene compound having a cell classification equal to or exceeding the cell classification of the pipe supplied under this specification. Detailed Provisions, section.10 (Ref. No. 7 through 15 [7 through 12]) BACKFILLING : CHANGE the 1 st paragraph: Controlled Density Fill, per City of Cincinnati Supplement to the State of Ohio (ODOT) Construction and Material specifications, Section above the "initial backfill" shall be required for Type "B" conduit and in the following locations: A. Where the trench parallels a road or street pavement and any part of the trench is within two feet of the edge of the pavement, control density fill shall be used and shall extend to the pavement subgrade for the entire width of the trench. B. Where the trench crosses a road or street pavement, control density fill shall be used and shall extend two feet on each side of the pavement at pavement subgrade (and shall extend beyond that point to the top of the initial backfill over the pipe at the angle of repose for bank run gravel). ADD the following text and CHANGE the 3rd paragraph: For Type B and Type C conduit compacted bank run gravel backfill above the initial backfill shall be required for all conduits and trenches under sidewalks, driveway and parking lot pavements, when not within two feet of a road or street pavement and not within the right of way. If within two feet of the road or street pavement or within the right of way, Controlled Density Fill above the initial backfill shall be required for all conduits and trenches under sidewalks, driveway and parking lot pavements. The following is Clarification text to the pipe bedding and initial backfill specifications: The City of Cincinnati Supplement to the ODOT specifications states under.10 Page 3 of 4

4 Backfilling starting in the middle of paragraph 3: Place backfill material below the haunches of the pipe and tamp to the specified density. Place an additional six to eight inch layer on each side of the pipe and compact. Backfill all conduits, except Type E, evenly on both sides of the pipe and to a minimum depth of one foot above the pipe for the full width of the trench with granular material placed in layers and pneumatically tamped. Therefore, the Contractor may use the same material for the bedding and for the initial backfill up to 12 inches above the top of the pipe. Standard Drawing Acc. No states: Class of material and depth of bedding under conduit: 6 inches No. 57 clean washed Type #1 gravel for conduit 27 to 60 inches in diameter. Additionally the granular material may be No. 57 crushed stone. Plan Sheets Sheet No. 4 & 53: ADD the following to the Pipe Alternates NOTE: The HOBAS fiberglass pipe shall have a stiffness of SN 72. The Ductile Iron Pipe class shall be Pressure Class 250 for 42 inch, 150 for 36 inch, and 150 for 27 inch (nominal 30 inch). ADD the following to the Two-way Cleanout NOTE: The invert depth of the pipe at the cleanout shall be 12 feet below grade per the Engineers direction. If stacks are used they should be supported and encased with concrete and installed per Standard Drawing Acc. No ) Manhole bottoms can be either cast-in-place or pre-cast, except that if connecting to existing pipe they must be cast-in-place. (There is no PVC main on the job). 3) Wherever Type C conduit is called out, the specifications for granular apply wherever that segment crosses driveway, parking, sidewalk, or other areas where the specifications require it. Page 4 of 4

5 Dry Run Area Sewers, Phase 1 Contract A Project ID: _ Trade: General This proposal requires the bidder to provide both "UNIT PRICES" and a "BID ITEM TOTAL." In the appropriate columns, bidder shall enter price per unit for labor and materials for every bid item. Therefore, if the ESTIMATED QUANTITY of the bid item is more than one, e.g. 25, the unit price is one of this amount, e.g. 1/25th. The "COMBINED UNIT PRICE" is the sum of "LABOR" and "MATERIALS" as unit prices. The "BID ITEM TOTAL" is the sum of the "COMBINED UNIT PRICE" times the "ESTIMATED QUANTITY" for EACH item. The "UNOFFICIAL TOTAL" is the sum of "BID ITEM TOTAL" for every bid item. SEE "INSTRUCTIONS TO BIDDERS" FOR EXAMPLES AND ILLUSTRATIONS. Ref. No. Spec. No. Item Description Estimated Quantity Unit Prices Labor Materials Combined (L+M) Bid Item Total (Comb. x Est. Quant.) Clearing and Grubbing Special Excavation 25 CY Special Fill Material (Bank Run Gravel) 25 TON Special Fill Material (No. 3 Gravel Bedding) 25 TON Concrete Masonry Cl. "C" 5 CY Concrete Masonry Cl. "C" (Encasement, Cradles, Key Blocks) 10 CY 7 6" Conduit, Type "I", Laterals 620 LF 7a 6" Conduit, "I", Stacks 70 LF 8 6" Conduit, Type "I", Jack & Bore 280 LF 9 42' Conduit, Type "PCCP" 25 LF 10 42" Conduit, Type "Jack & Bore" 381 LF 76

6 Ref. No. Spec. No. Item Description Estimated Quantity Unit Prices Labor Materials Combined (L+M) Bid Item Total (Comb. x Est. Quant.) 11 42" Conduit, Type "C' 3,851 LF 12 36" Conduit, Type "B" 1,124 LF 12a 36" Conduit, Type "Jack & Bore" 145 LF 13 Standard Two Way Cleanout 20 EA 14 6" T-Branches on 42" Conduit, Including Bends 11 EA 15 6" T-Branches on 36" Conduit, Including Bends 9 EA Video Taping of Installed Sewers Standard Type "S" Manhole 3 EA Modified Type "S" Manhole 10 EA Modified Type "S" Manhole, 8' Diameter 1 EA 20 Utility Poles and Lines Relocation or Support Allowance Environmental Compliance (Stormwater Pollution Prevention Plan) Environmental Compliance (Creek Crossing Restoration) 52 LF 23 Environmental Compliance (Silt Fence) 4,000 LF 24 Performance Bond 77

7 Dry Run Area Sewers, Phase 2 Contract A Project ID: Trade: General This proposal requires the bidder to provide both "UNIT PRICES" and a "BID ITEM TOTAL." In the appropriate columns, bidder shall enter price per unit for labor and materials for every bid item. Therefore, if the ESTIMATED QUANTITY of the bid item is more than one, e.g. 25, the unit price is one of this amount, e.g. 1/25th. The "COMBINED UNIT PRICE" is the sum of "LABOR" and "MATERIALS" as unit prices. The "BID ITEM TOTAL" is the sum of the "COMBINED UNIT PRICE" times the "ESTIMATED QUANTITY" for EACH item. The "UNOFFICIAL TOTAL" is the sum of "BID ITEM TOTAL" for every bid item. SEE "INSTRUCTIONS TO BIDDERS" FOR EXAMPLES AND ILLUSTRATIONS. Ref. No. Spec. No. Item Description Estimated Quantity Unit Prices Labor Materials Combined (L+M) Bid Item Total (Comb. x Est. Quant.) Clearing and Grubbing Special Excavation 25 CY Special Fill Material (Bank Run Gravel) 25 TON Special Fill Material (No. 3 Gravel Bedding) 25 TON Concrete Masonry Cl. "C" 5 CY Concrete Masonry Cl. "C" (Encasement, Cradles, Key Blocks) 10 CY 7 6" Conduit, Type "I", Laterals 415 LF 7a 6' Conduit, Type "I", Jack & Bore, Stacks 25 LF 8 6" Conduit, Type "I", Jack & Bore 265 LF 9 27" Conduit, Type "Jack & Bore" 265 LF 10 27" Conduit, Type "C" 983 LF 78

8 Ref. No. Spec. No. Item Description Estimated Quantity Unit Prices Labor Materials Combined (L+M) Bid Item Total (Comb. x Est. Quant.) 11 Standard Two Way Cleanout 13 EA 12 6" T-Branches on 27" Conduit, Including Bends 13 EA Video Taping of Installed Sewers Modified Type "S" Manhole 5 EA 15 Environmental Compliance (Silt Fence) 1,200 LF 16 Performance Bond 79