Sunset Avenue, Sunset Lane and Rapid Run Pike Sewer ... · Page 1 of 2 Sunset Avenue, Sunset Lane and Rapid Run Pike Sewer Separation, Project ID 11240010 Date Issued: February 25,

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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

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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 don’t 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



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












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Unit Prices










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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Unit Prices



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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Unit Prices



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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Unit Prices



73 Reinforcing Steel 2250 LBS