Amendment_0006_-_PRA-NATR_1E10.pdf

Amendment No. 0006

Info Page 1 of 2

U.S. DEPARTMENT OF TRANSPORTATION

FEDERAL HIGHWAY ADMINISTRATION

EASTERN FEDERAL LANDS HIGHWAY DIVISION

Project PRA-NATR 1E10 Natchez Trace Parkway

Little Swan Creek Bridge Replacement Big Swan Creek Bridge Repair

Solicitation: DTFH71-15-B-00005

The purpose of this Amendment is to:

1) Replace the Solicitation B Pages to update pay item quantity for epoxy coated reinforcing steel.

2) Revise the Plans to clarify various sheets for epoxy coated reinforcing steel items.

3) Provide a summary of responses to questions/clarifications asked by potential bidders.

4) Reschedule the bid opening date to May 12, 2015, at 2:00 p.m. EST.

Solicitation B Pages changes

1. Delete the Solicitation Bid Schedule pages B-1 thru B-4, and substitute the amended Bid Schedule pages B-1 thru B-4.

a) Updated quantity for pay item 55401-2000 Reinforcing Steel, Epoxy Coated.

Plans changes

1. Delete Plan Sheets C01, R01, R06, R08, R10, R11, R19, and R22, and substitute the amended Plan Sheets C01, R01, R06, R08, R10, R11, R19, and R22.

a) Sheet C1 (Tabulation of Quantities) updated to increase quantity for reinforcing steel, epoxy coated pay item.

b) Sheet R01 (General Notes) updated to add general notes.

c) Sheet R06 (Abutment 1 Reinforcement) updated to revise bar diameter.

d) Sheet R08 (Abutment 2 Reinforcement) updated to revise bar diameter.

e) Sheet R10 (Wingwall A and B Details) updated to revise bar diameter and add bar label.

f) Sheet R11 (Wingwall C and D Details) updated to add bar label.

g) Sheet R19 (Railing Details - 1) updated to add bar spacing.

h) Sheet R22 (Expansion Joint Details) updated to revise joint setting table.

Info Page 2 of 2

2. Delete Amendment 0004 Plan Sheets R17 and R28, and substitute the Amendment 0006 Plan Sheets R17 and R28.

a) Sheet R17 (Deck Panels) updated to add detail, revise bar label and table, and add longitudinal overhang bar.

b) Sheet R28 (Abutment 2 Reinforcement) updated to add closure pours rebar.

B - 1

Amendment Item No. Pay Item No. Description Quantity Unit Unit Price Amount

A1000 15101-0000 MOBILIZATION

ALL LPSM $___LPSM_____ $____________

A1005 15201-0000 CONSTRUCTION SURVEY AND STAKING

ALL LPSM $___LPSM_____ $____________

A1010 15401-0000 CONTRACTOR TESTING

ALL LPSM $___LPSM_____ $____________

A1015 15705-0100 SOIL EROSION CONTROL, SILT FENCE

1,200 LNFT $____________ $____________

A1020 15705-2000 SOIL EROSION CONTROL, TURBIDITY BARRIER

100 LNFT $____________ $____________

A1025 15706-0200 SOIL EROSION CONTROL, CHECK DAM

2 EACH $____________ $____________

A1030 15706-1600 SOIL EROSION CONTROL, STABILIZED CONSTRUCTION ENTRANCE

1 EACH $____________ $____________

A1035 20301-0400 REMOVAL OF BRIDGE

1 EACH $____________ $____________

A1040 20315-0000 SAWCUTTING PAVEMENT

45 LNFT $____________ $____________

A1045 20401-0000 ROADWAY EXCAVATION

310 CUYD $____________ $____________

A1050 20701-0800 EARTHWORK GEOTEXTILE, TYPE II-B

1,250 SQYD $____________ $____________

A1055 20801-0000 STRUCTURE EXCAVATION

2,000 CUYD $____________ $____________

A1060 25101-3000 PLACED RIPRAP, CLASS 3

15 CUYD $____________ $____________

A1065 30101-4000 AGGREGATE BASE GRADING C OR D

650 TON $____________ $____________

B - 2

A1070 30501-0000 AGGREGATE-TOPSOIL COURSE

170 TON $____________ $____________

A1075 40101-0600 SUPERPAVE PAVEMENT, 1/2-INCH NOMINAL MAXIMUM SIZE AGGREGATE,

0.3 TO <3 MILLION ESAL (2-INCH BRIDGE ASPHALT BASE)

115 TON $____________ $____________

A1080 40101-0600 SUPERPAVE PAVEMENT, 1/2-INCH NOMINAL MAXIMUM SIZE AGGREGATE,

0.3 TO <3 MILLION ESAL (TYPE IV PAVEMENT ROUGHNESS, DETOUR

REPAIR)

160 TON $____________ $____________

A1085 40101-0600 SUPERPAVE PAVEMENT, 1/2-INCH NOMINAL MAXIMUM SIZE AGGREGATE,

0.3 TO <3 MILLION ESAL (TYPE IV PAVEMENT ROUGHNESS)

160 TON $____________ $____________

A1090 40101-1000 SUPERPAVE PAVEMENT, 3/4-INCH NOMINAL MAXIMUM SIZE AGGREGATE,

0.3 TO <3 MILLION ESAL

230 TON $____________ $____________

A1095 55101-0600 PRECAST PRESTRESSED CONCRETE PILES, 14-INCH X 14-INCH, IN PLACE

350 LNFT $____________ $____________

A1100 55201-0200 STRUCTURAL CONCRETE, CLASS A (AE)

450 CUYD $____________ $____________

A1105 55201-0800 STRUCTURAL CONCRETE, CLASS D (AE)

335 CUYD $____________ $____________

A1110 55202-1000 STRUCTURAL CONCRETE, CLASS D (AE), FOR APPROACH SLABS, TYPE 1

120 SQYD $____________ $____________

A1115 55220-0000 EXPANSION JOINTS

80 LNFT $____________ $____________

A1120 55302-1900 PRECAST, PRESTRESSED CONCRETE BULB TEE GIRDERS, 63"

1,200 LNFT $____________ $____________

B - 3

A1125 55401-1000 REINFORCING STEEL

85,550 LB $____________ $____________

0006 A1130 55401-2000 REINFORCING STEEL, EPOXY COATED

80,100 LB $____________ $____________

A1135 55601-0700 BRIDGE RAILING, CONCRETE, NATCHEZ TRACE RAIL

605 LNFT $____________ $____________

A1140 55901-0000 MEMBRANE WATERPROOFING (SPRAY APPLIED)

940 SQYD $____________ $____________

A1145 56401-1000 BEARING DEVICE, ELASTOMERIC

20 EACH $____________ $____________

A1150 60103-0080 CONCRETE, HEADWALL FOR 15-INCH PIPE CULVERT

1 EACH $____________ $____________

A1155 60201-0500 15-INCH PIPE CULVERT

50 LNFT $____________ $____________

A1160 60403-1300 INLET, TYPE 5A MODIFIED

1 EACH $____________ $____________

A1165 62402-0300 FURNISHING AND PLACING TOPSOIL, 4-INCH DEPTH

0.5 ACRE $____________ $____________

A1170 62501-0000 TURF ESTABLISHMENT

0.60 ACRE $____________ $____________

A1175 63308-3000 OBJECT MARKER, TYPE 3

4 EACH $____________ $____________

A1180 63316-1000 REMOVE AND RESET SIGN

3 EACH $____________ $____________

A1185 63401-1500 PAVEMENT MARKINGS, TYPE H, SOLID

3,050 LNFT $____________ $____________

A1190 63406-0400 RAISED PAVEMENT MARKER TYPE D

210 EACH $____________ $____________

B - 4

A1195 63501-0000 TEMPORARY TRAFFIC CONTROL

ALL LPSM $___LPSM_____ $____________

A1200 63503-0900 TEMPORARY TRAFFIC CONTROL, SNOW FENCE

250 LNFT $____________ $____________

A1205 63701-0000 FIELD OFFICE

1 EACH $____________ $____________

Submitted by:____________________________________ Schedule Total:____________

Questions/Clarifications

Questions / Clarifications

The following questions and issues were submitted to EFLHD at eflhd.contracts@dot.gov. The Government response or clarification is provided. Due to the repetitive nature of several questions and issues, the wording of the questions may have been revised and some questions have not been included. The Government’s direct response to the sender may also have been updated below for better clarity.

1. Amendment No.1, 3 & 4 all address the load restrictions in the Q&A, but still limit the mobilization of construction equipment to the project to 66,000 lbs. GVW. Due to the specified construction methods, the crane that will be required can only be broken down to approximately 100,000 lbs., not including the weight of the truck and trailer. Can the weight restrictions be waived for the mobilization/demobilization of ALL construction equipment to the project site?

It is understood the load restrictions on the Natchez Parkway will be waived for the hauling of the Little Swan Creek Bridge precast units and that the hauling of all other materials must be as per specification 104.05. Will the hauling restrictions be waived in order to mobilize construction equipment (300 ton crane as an example) to the project sites? Even stripped down the crane components will exceed the load restrictions of specification 104.05.

Response: The mobilization and demobilization of equipment needed for constructing / erecting the precast units are included in the weight restrictions that were waived.

Please be reminded that the restrictions for daily traffic that would be going to and from the project (i.e. riprap, concrete, steel, etc.) have not been lifted.

2. Subsection 552.11(b)(6) requires the same precast plant to fabricate all of the precast elements products used in the bridge system. Does this include the driven piles?

Response: Piles are not included in the requirements of Subsection 552.11(b)(6).

3. No cross-sections are shown for the 6” transverse joint between deck panels nor the 3’-9” (2 x 1’-10 ½’) wide joint over centerline of the pier on sheet R17. Provide a cross section detail for those joints? (Attached detail of a similar type closure is provided for review)?

Response: Please see amended Plan Sheet R17 (Deck Panels) for details on deck transverse closure pours and for closure pour over the pier.

4. For epoxy steel in the precast units, is the epoxy steel quantity included in the 55,000.00 LBS bid quantity? The precast units look to have more than 55,000.00 Lbs.

Response: Additional quantities for pay item 55401-2000 Reinforcing Steel, Epoxy Coated have been included by amendment.

Note that quantities shown on the Plans and Bid Schedule are estimated and all items are bid and paid for on a unit price basis. The Contractor will be paid for the amount of work ordered by the CO, completed and accepted according to the specifications. Also note all quantities of work must be ordered by the CO; if the Contractor performs work not ordered, the Government will not pay for it. See the last paragraph of Subsection 109.05 of the FP (standard specifications).

5. Sheet R17 section A-A, some of the bar marks for the abutment and wing precast units are conflicting from elevation view to plan view or from plan view. This will affect the total quantity and will also impact the size of the Splice Sleeve which is a subsidiary item and cost. Can you review and advise?

Response: Please see amended Plan Sheet R17 (Deck Panels) for revisions to the bar labels.

6. For the deck panels, is there a minimum or maximum height above the girders (Haunch) that needs to be met? If so can, provide a detail for deck panel support and haunch buildup prior to the application of the UHPC? This will be needed in order to provide a profiled deck section prior to final paving.

Response: Panels need to be leveled to reach the final deck elevations as shown on the deck elevation on Plan Sheet R15 (Deck Elevation). The haunch will vary.

7. For the bridge railing:

a. Is all the steel shown on sheet R19 to be included with the bid item for bridge railing or are the bars embedded in the overhang or wing walls to be included with the epoxy steel bid item?

Response: All steel on Plan Sheet R19 (Railing Details -1) is included in the bridge railing pay item.

b. Bar # 5CE2 in the deck and curb does not have a spacing given. What is the spacing of this bar?

Response: Please see amended Plan Sheet R19 (Railing Details -1) which includes the revised 12-inch spacing for bar #5CE2.

c. Bar # 3RE7 in the interior section on sheet R19 does not show how many equal spaces should be between the posts. Can you provide?

Response: Please see amended Plan Sheet R19 (Railing Details -1) which includes the revised spacing between the posts for bar #3RE7.

8. Constructability issue regarding the Grouted Splice Couplers associated with the Pier construction. Sheets R12 and R13 call for a vertical grouted splice connector to join battered reinforcing steel. The tolerances are such that we believe this will not work even if we upsize to the largest splice connector available. The red-line sketch provided with the 4/14/2015 email demonstrates the conflict. Please advise how this splice connection will be accomplished?

Response: Reinforcement needs to be bent at the end section to come out straight.

9. All of our suppliers are telling us that Ultra High Performance Concrete is not sold in the United States. Please provide a supplier for this product? If unable to provide a supplier, please provide an alternate material that is available and acceptable?

Response: Lafarge North America Inc. is a supplier of ultra high performance concrete (UHPC). The product is called Ductal UHPC and it comes in bags or “super sacks” to be mixed. Please see the contact information below:

UHPC / Ductal® Lafarge North America Inc.

8700 W Bryn Mawr Ave., Suite 300 Chicago, IL USA 60631 E-Mail: ductal@lafarge.com Phone: (773) 355-4526 Website: www.ductal.com

10. Section 107, will any tree protection be required?

Response: Please refer to SCR Subsection 107.02 for tree protection requirements. If tree protection is needed, there is no direct payment for this work. Please see FP Subsection

109.05 for further information regarding scope of payment for direct and indirect work.

Bidders will have to determine where they account for indirect work.

11. Section 551, driven piles:

a. What depth will be required for the prebore?

Response: Please refer to FP Subsection 551.07 for preboring requirements which states “In compacted embankments more than 5 feet deep, prebore the pile hole to natural ground.” Also Plan Sheet R29 (Boring Location Plan and Subsurface profile) and the posted Report 5_Soils and Foundation (Geotechnical Report) which indicate fill exists to a depth of 37.4 feet below existing site grade at the location of boring B-1.

Below the fill at this location, natural ground was encountered in the form of limestone rock. Preboring should extend to rock (natural ground).

Please also see FP Subsection 551.07 which states “For piles end-bearing on rock or hardpan, preboring may extend to the surface of the rock or hardpan. Seat the pile into the end-bearing strata.” The Geotechnical Report indicates end-bearing on rock conditions.

b. If the prebore extends to rock, is a dynamic analysis still required?

Response: Yes. Please see Plan Sheet R04 (Foundation Layout) for the location of two test piles.

12. Section 552 Structural Concrete:

a. The precast abutment sections will weigh as much as 185,000.00 lbs. and according to our inquiries the Federal Bridge Gross Weight Formula will require tractor trailer lengths to be approximately 160 feet long in order to haul these precast concrete units to the project site.

Are additional horizontal or vertical construction joints allowed in order to lower the weight of the individual precast units?

Response: Additional horizontal joints are allowed, but no vertical joints are permitted.

b. Will the grouted splice coupler detail, as shown on Sheets No. R05 and R12, be allowed at all horizontal construction joint locations of the substructure? Please provide a detail for joining precast to precast?

Response: Yes. The grouted splice coupler detail shown on Plan Sheets R05 (Abutment 1 Layout) and R12 (Precast Pier Layout) is for all the horizontal joints of the substructure.

c. Sheet No. R23 states “see Abutment 1 Reinforcement and Abutment 2 reinforcement sheet for details” of the dowels that connect the Approach Slabs to the backwalls but no details are provided. Please provide dowels connection detail for the Approach Slabs connection to the backwalls?

Response: Embedment of this dowel into the backwall is 12 inches. No additional detail will be provided.

13. Section 619, Fences, Gates, and Cattle Guards:

a. Provide a detail for the farm gate? Is this a subsidiary cost to traffic control?

Response: Material specifications for a fence gate can be found in FP Subsection 619.02 which will then refer you to Subsection 710.05. Also refer to FP and SCR Subsection

619.03 for further information. The Contractor will have to provide a detail to the CO for approval. No additional detail will be provided.

If a farm gate is needed, it is included as part of the lump sum traffic control pay item described in SCR Subsection 635.03(j).

b. Provide a detail for the snow fence?

Response: Material specifications for the temporary plastic fence can be found in FP Subsection 619.02, which will then refer you to Subsection 710.11. No additional detail will be provided.

14. Section 552, Structural Concrete, Schedule B:

a. Sheet No. R35 includes a Full Depth Repair Detail and Procedure but no quantity is set up in the bid schedule. Do you anticipate any full depth repair?

Response: The quantities provided for pay item 55205-0000 Repair Concrete (Bottom Deck Repair) are an estimate based on a visual inspection. The Contractor will need to do further investigation in order to determine if full depth repair is needed and subject to the approval of the CO during construction. Please see the second paragraph of the response for Question 4 for discussion on plan quantities vs. actual quantities.

b. Sheet No. R35 includes a detail for Overhead Concrete Repair that conditions High Early strength concrete material shall be used for the patch. Will you allow core drilling through the deck in order to place the concrete?

Response: Core drilling will not be allowed.

c. If core drilling through the deck is not allowed, then is a full depth repair allowed instead of an overhead concrete repair?

Response: If full depth repair is not necessary due to the sound condition of the concrete, full depth repair will not be allowed.

d. Will there be a need to provide one separate field office for Schedule A and one separate field office for schedule B or will one field office suffice?

Response: There is only one physical field office required for Schedules A and B. One physical field office would need to be installed and maintained for the duration of the project no matter if one or both schedules are awarded.

15. Section 108, Prosecution and Progress, if both Schedule A (Base contract) and Schedule B (Government Option 1) are not awarded at the same time, will the Government give an option to award Schedule B at any time during which Schedule A is under contract?

Response: As stated in the B Pages - Bid Schedule Instructions, if the funding for Schedule B is received after the award of Schedule A, the Government has the right to exercise Schedule B at the unit prices bid no later than the contract completion date of Schedule A.

It cannot be determined at this time when or if Schedule B will be awarded.