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    Sunset Avenue, Sunset Lane and Rapid Run Pike Sewer Separation, Project ID 11240010

    Date Issued: February 25, 2015

    ADDENDUM NO. 9

    This addendum will only be distributed via e-mail, but will remain available for viewing on the MSDGC website at www.MSDGC.org on the project-specific web page. No hard copy will follow. NOTE: Please be sure to enter the TOTAL NUMBER of Addenda issued on the Official Bid Form contained in the Bid Document 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:

    INVITATION TO BID BOOKLET: REPLACE the previously issued Unit Price Sheet (in Addendum 5)

    with the revised Unit Price Sheet, Bid Item #35 (attached below).

    Questions:

    1) Do the type P manholes require a rubber gasket for the inlet and outlet pipe connections as per standard drawing #49056? Typically storm manholes do not require rubber gaskets for the pipe connections. Answer: Rubber gaskets will be required for all inlet and outlet pipe connections.

    2) In the plans you give a size for the manhole. But a lot of them are not the correct size required for the size pipe being used or because of the angle of deflection. For example there are 6 108 manholes but

    http://www.msdgc.org/

  • Page 2 of 2

    not one makes a 108 manhole. It will have to be a 120. How will these issues be handled? Please clarify. Answer: The bidder can either cast a 108 manhole or provide a 120 precast manhole at no extra cost to the project.

    3) There are 2 manhole located on each side of the water quality structure that I dont believe you have accounted for in for bid item quantities. Answer: A revised bid item list is attached. One ODOT Type 3 Manhole was added.

    4) Proposed headwall SL-12.2 on page 33/73 there is no detail for this structure. Standard drawing #49030 states 30 & over requires a special design. Can detail be provided? Answer: ODOT HW-1 can be used in lieu of the SMU 49030 headwall. See attached drawing.

    5) I am requesting information to design an alternate water quality unit.

    In order to design accordingly i am asking for the following information. The engineer on record should have this information. Water Quality Flow (cfs)= Design Storm Flow (cfs)- Design Storm Interval (cfs) Contributing Acres = Percent Impervious =

    Answer:

    Water Quality Flow (cfs) = 51 cfs

    Design Storm Flow (cfs) = 277.66 cfs (10 yr) and 390.6 cfs (25 yr)

    Design Storm Interval (cfs) = See Design Storm Flow above for interval

    Contributing Acres = 465 acres +/-

    Percent Impervious = 25% +/-

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    Sunset Avenue, Sunset Lane and Rapid Run Pike Sewer Separation

    Project ID: 11240010

    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. Item Description Estimated Quantity Unit Prices

    Labor Materials Combined (L+M)

    Bid Item Total (Comb. X Est. Quant)

    1 Clearing and Grubbing 1 LS

    2 Abandon Manhole 4 EA

    3 Remove Drainage Structure 28 EA

    4 Special Excavation 500 CY

    5 Special Fill Material (Bank Run Gravel) 10 TON

    6 Special Fill Material (No. 2 Gravel Bedding)

    10 TON

    7 Concrete Masonry CI."C" 10 CY

    8 Concrete Masonry CI. "C" (Encasement, Cradles, Key Blocks & Collars)

    10 CY

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    Ref. No. Item Description Estimated Quantity

    Unit Prices

    Labor Materials Combined (L+M)

    Bid Item Total (Comb. X Est. Quant)

    9 Seal and Abandon Existing Sewer (Less than 12")

    1 LS

    10 Fill, Seal & Abandon Existing Sewer (12" and Larger)

    193 CY

    11 6" Conduit, Type I 220 LF

    12 12" Conduit, Type B 1378 LF

    13 12" Conduit, Type C 406 LF

    14 15" Conduit, Type B 84 LF

    15 15" Conduit, Type C 28 LF

    16 18" Conduit, Type B 248 LF

    17 18" Conduit, Type C 132 LF

    18 24" Conduit, Type B 133 LF

    19 24" Conduit, Type C 44 LF

    20 30" Conduit, Type B 663 LF

    21 30" Conduit, Type C 576 LF

    22 36" Conduit, Type B 2179 LF

    23 36" Conduit, Type C 365 LF

    24 42" Conduit, Type B 91 LF

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    Ref. No. Item Description Estimated Quantity

    Unit Prices

    Labor Materials Combined (L+M)

    Bid Item Total (Comb. X Est. Quant)

    25 42" Conduit, Type C 202 LF

    26 48" Conduit, Type B 580 LF

    27 48" Conduit, Type C 23 LF

    28 54" Conduit, Type B 102 LF

    29 60" Conduit, Type B 3019 LF

    30 66" Conduit, Type B 280 LF

    31 72" Conduit, Type B 136 LF

    32 Video Taping of Installed Sewers 1 LS

    33 Standard Manhole on Storm Conduits 42" and Under (Type "P")

    25 EA

    34 Precast Storm Vault 1 EA

    35 ODOT No. 3 Manhole, 72", 84", 96" and 108" Diameter

    37 EA

    36 ODOT No. 3 Manhole, 72" & 96" Diameter with Silica Fume Base

    3 EA

    37 ODOT No. 5 Manhole, 144" Diameter 1 Ea

    38 Standard Combination Inlet Manhole (CIMH)

    19 EA

    39 Standard Combination Inlet (CI) 18 EA

    40 Standard Double Ditch Inlet (DDI) 8 EA

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    Ref. No. Item Description Estimated Quantity

    Unit Prices

    Labor Materials Combined (L+M)

    Bid Item Total (Comb. X Est. Quant)

    41 Standard Double Valley Inlet (DVI) 10 EA

    42 Standard Ditch Inlet Manhole Type B (DIMH)

    3 EA

    43 Standard Ditch Inlet Manhole Type B Modified (DIMH-MOD)

    1 EA

    44 Typical Headwall 3 EA

    45 4" Unclassified Underdrains 707.31 178 LF

    46 Detention Basin Seeding and Final Restoration

    3400 SY

    47 Sodding Staked 750 SY

    48 Asphalt Paved Ditch 580 SF

    49 Connect to Existing Structure 11 EA

    50 Connect to Existing Sewer 12 EA

    51 Furnishing and Laying 8" Ductile Iron Pipe and Fittings

    255 LF

    52 Furnishing and Laying 16" Ductile Iron Pipe and Fittings

    378 LF

    53 Detention Basin Excavation (including benching)

    1 LS

    54 Detention Basin Embankment 1 LS

    55 Detention Basin Outlet Structure 1 EA

    56 Gabion Baskets 14 CY

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    Ref. No. Item Description Estimated Quantity

    Unit Prices

    Labor Materials Combined (L+M)

    Bid Item Total (Comb. X Est. Quant)

    57 Environmental Compliance (Mitigative Measures and Erosion Control Plan)

    1 LS

    58 Storm Water Pollution Prevention Plan - SWPPP, NOI, NOT

    1 LS

    59 Project Sign 4 EA

    60 Performance Bond 1 LS

    61 Water Quality Unit 1 EA

    62 Detention Basin Liner (12" Clay Liner) 1095 SY

    63 Fill, Seal & Abandon Structure 28 EA

    64 Diversion Vault 1 EA

    65 Furnishing and Installing 18" Steel Casing

    10 LF

    66 Concrete, Class "C" 8 CY

    67 Additional Excavation 10 CY

    68 Exploratory Excavation 10 CY

    69 Changing 8" and Under Pipe Sewer 10 LF

    70 Changing 10" Thru 24" Pipe Sewer 10 LF

    71 Reconnecting Existing 3/4" Service Branch

    3 EACH

    72 Furnishing and Installing Curb and Roadway Box (Reconnect)

    3 EACH

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    Ref. No. Item Description Estimated Quantity

    Unit Prices

    Labor Materials Combined (L+M)

    Bid Item Total (Comb. X Est. Quant)

    73 Reinforcing Steel 2250 LBS

  • AddendumTemplate11240010adden9_11240010_unit price sheetODOT HW-18-1-1963-0016-1-1965-002

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