Page 1 of 1 ITB-SW-13-02 - Re-Bid Three Sisters Water Control Structure

ADDENDUM NO. 5

ITB-SW-13-02 Re-Bid Three Sisters Water Control Structure ISSUE DATE: December 11, 2012

DUE DATE: December 21, 2012 @ 2:00pm

SUBJECT: Questions & Answers ___________________________________________________________________________________________________________ INTENT: This addendum is issued prior to the date bids are due in order to incorporate the

following clarifications, additions, omissions, deletions, or changes into the Contract Documents.

Except as hereinafter specified, the work shall be in accordance with the drawings and

specifications. Bidders are to use the changed quantities of the items listed in this addendum in their

proposals, and it shall become a part of the Contract Documents when construction is executed.

Bidders are reminded that this addendum must be noted on the “Official City Acknowledgment Form” when they submit their proposal. A signed copy of the addendum must also be included with the bid submittal. ___________________________________________________________________________________________________________

1. Question: There doesn’t appear to be a bid bond form included in the bid package. Does the City have a preferred bid bond form that we should use? Answer: The City does not have a preferred Bid Bond so any one will do.

2. Question: The Direct Purchase of Materials form lists both the Contech risers and the Golden Harvest

gates, but the Contech quote states that Contech’s price includes the cost of the gates. Are we to subtract the amount quoted by Golden Harvest from Contech’s quote for this form? Answer: Contech’s price includes the purchase of the gates for installation in the riser. Use Contech’s net total price of $82,120.00 This price also includes the cost of the commissioning and field service for all three gates on the same day.

3. Question: Should we include the cost of the field service visit on the Direct Purchase form? Answer: The cost of the field service is already included in Contechs net total price of $82,120.00.

4. Please note: Included in this addendum are the vinyl sheet pile weir and bulkhead specifications.

5. Please note: Included in this addendum is AWC, Inc.’s specifications for the gate control system.

6. Please note: Funding for this project is contingent upon the City of Palm Coast City Council’s approval of the Stormwater budget.

Acknowledgment:

________________________________________ Signature and Date

________________________________________ Printed Name and Title

________________________________________ Company Name

END OF ADDENDUM NO. 5

*Eighteen pages to follow.

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Three Sisters Weir Structures – I-1, I-4 & I-6

Vinyl Sheet Pile Weir and Bulkhead Specification

Contractor to construct a vinyl sheet pile weir system as noted in the bid documents. Final design is to be signed and sealed by a Florida registered professional engineer experienced with the design of vinyl sheet pile bulkheads and weirs. Requirements presented herein are for bidding purposes and are minimum requirements. City reserves the right to accept or reject any proposal based on price/cost, technical merit, schedule, performance, or owner’s risk.

Materials Vinyl Sheet Piling –

Sheet pile profile shall be manufactured with an interlocking feature that ensures adjacent panels maintain alignment. The sheeting shall be co-extruded with a virgin capstock and high quality reground substrate. The sheet pile shall be free from visible cracks and other injurious defects. The manufacturer’s extrusion facility shall have at least 10 years experience with the manufacturing of vinyl sheet piling and 25 years experience with the manufacturing of other PVC parts. Approved supplier of the vinyl sheet piling is Everlast Synthetic Products, LLC, 1000 Wyngate Parkway, Suite 100, Woodstock, GA 30189, 800-687-0036/770-241-6195(cell)

Substrate – shall be a high grade homopolymer vinyl compound having the following minimum properties:

Color Unspecified --------------- Specific Gravity 1.43 ASTM D-792 Cell Class 13344 ASTM D-1784

Capstock – shall be comprised of virgin capstock homopolymer vinyl compound having the minimum following properties:

Color Light Grey or Clay --------------- Thickness 10 mils Specific Gravity 1.43 ASTM D-792 Standard Industrial Code(SIC#)

3084 --------------

Cell Class 143354311122 ASTM D-4216 ESP Vinyl Sheet Pile Material Properties:

Tensile Yield 6,300 psi ASTM D-638 Tensile Modulus 380,000 psi ASTM D-638 Creep Stress 5,000 psi (<4.5% strain)

4,000 psi (<3.0% strain) ASTM D-5262 A

Interface Direct Shear 20° (SM Soil) ASTM D-5321 B

Interlock Flow Rate 2.01x10 -4 (57 psf) C 6.93x10 -4 (365 psf) C

GRI Certified Lab D

Dynamic Modulus 332,136 psi (32°F) 266,144 psi (100°F)

ASTM D-4065 E

A Contractor shall provide a minimum of 10,000 hrs. of creep data on finished vinyl sheet pile part with a sample thickness of 0.25 inches by a GRI certified lab B Contractor shall provide interface direct shear data on a finished sheet pile part. C Units for interlock flow rate are in cubic feet per second / ft. of interlock / LF of wall.

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D Contractor shall provide interlock flow rate data from a lab certified by the Geosynthetics Research Institute (GRI). E Contractor shall provide dynamic modulus data from an ISO certified laboratory.

ESP Vinyl Sheet Pile Geometric Properties: ESP 8.5:

Profile Width 18 inches (max. width) Interlock to Interlock Profile Depth 10 inches (max. depth) Outside to outside

flange I (moment of inertia) 155.0 in4 /ft --------------- Z (section modulus) 31.0 in3/ft --------------- Rg (radius of gyration) 4.0 in (major axis)

10.5 in (minor axis) ---------------

Thickness 0.46 inches ---------------

ESP 4.1: Profile Width 20 inches (max. width) Interlock to Interlock Profile Depth 8 inches (max. depth) Outside to outside

flange I (moment of inertia) 62.3 in4 /ft --------------- Z (section modulus) 15.6 in3/ft --------------- Rg (radius of gyration) 3.1 in (major axis)

6.1 in (minor axis) ---------------

Thickness 0.30 inches ---------------

Reinforced Concrete for Cap and Deadmen: C.I.P. Concrete cap as noted in the cap details C.I.P. Deadmen as designed by Engineer of Record Rebar to be grade 60 Rebar cover is 3 inches Concrete to have a minimum 28 day compressive strength of 4,000 psi and maximum w/c

ratio of 0.5 Expansion and construction joints to be provided (cap only) to allow temperature

movement of the cap Contractor to provide line item cost for concrete deadmen in the event soil variations

dictate additional anchorage Earth Anchors

Shall be ductile iron and hot dip galvanized per ASTM A123 Shall be of sufficient size, embedment, and overburden to develop the required proof load Contractor provide line item cost for earth anchor placement in the event soil variations

require additional anchors

Tie Rods and Miscellaneous Hardware: All steel not entirely encased in concrete shall be ASTM F1554 (or approved equal) Hot dip galvanized per ASTM A136 steel

Sealant – sealant used for interlocks to be used in weir structures only, shall be one of the following:

Prime Flex 900 XLV

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DeNeef Swell Seal

Weep Holes/Drains – to be EverDrains Backfill

Backfill material placed behind the sheeting shall be free-draining and restricted to GW, GP, SW or SP per ASTM D2487

Backfill shall be compacted to a minimum of 95% per ASTM D-698

Weir Structure (I-1, I-4, and I-6) requirements : Sheet Pile shall be ESP 8.5 and 22 feet long Sealant shall be applied into the sheet pile interlocks prior to driving sheets Sheet pile shall have a reinforced concrete cap based on the detail provided Downstream face shall have coquina rip rap in area as noted on bid plans. Bottom limits

shall be a minimum of three (3) feet below pipe invert elevation(s) and extend horizontally a minimum of five (5) feet beyond the end of the pipe.

Top limits of coquina rip rap to start just under concrete cap and project at a 2:1 grade until it intersects 3:1 maximum grade of compacted structural sand fill

Compacted structural sand fill shall project at a 3:1 maximum slope from the coquina rip rap until it reaches the bottom of the basin at Elevation +12.0

Transition Bulkhead (tie into weir structures at 90º and transition top elevation from EL. +25 to +17):

Sheet Pile shall be ESP 8.5 and 18 feet long No sealing of interlocks will be permitted, and drains are required at a minimum spacing of

five (5) feet, and located 0.5 feet above NWL of the basin Sheet pile shall have a reinforced concrete cap based on the detail provided Compacted structural sand fill shall be placed or graded at a maximum slope of 3:1 to

ensure the exposed height of sheet pile bulkhead is no greater than six (6) feet and projects to the basin bottom at EL. +12.0

Tie back system shall be based on a maximum spacing of six (6) feet Steel hot dip galvanized tie-rod for tie back system shall have a minimum diameter of ¾

inches and extend a minimum horizontal distance behind the sheets of nineteen (19) feet Anchor for tie-back shall be either reinforced concrete (4,000 psi concrete for foundation

use) or driven HDG earth anchors with a required proof load of 12,000 pounds per anchor Level Bulkhead Wall (where Cap is at constant EL +17.0)

Sheet Pile shall be ESP 4.1 and 14 feet long Use transition corner (adapter) piece to connect interlocks of ESP 8.5 sheet to ESP 4.1

sheet No sealing of interlocks will be permitted, and drains are required at a minimum spacing of

five (5) feet, and located just above NWL of the basin Sheet pile shall have a reinforced concrete cap based on the detail provided Tie back system shall be based on a maximum spacing of five (5) feet Steel hot dip galvanized tie-rod for tie back system shall have a minimum diameter of ¾

inches and extend a minimum horizontal distance behind the sheets of nineteen (19) feet Anchor for tie-back shall be either reinforced concrete (4,000 psi concrete for foundation

use) or driven HDG earth anchors with a required proof load of 6,000 pounds per anchor

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Boat Ramp – sheet pile walls (two rows) in boat ramp: Removal of embankment and replacement with a compacted fill to be required for the boat

ramp area Sheet Pile shall be ESP 8.5 and 18 feet long No sealing of interlocks will be permitted, and drains are required at a minimum spacing of

five (5) feet, and located 0.5 feet above NWL of the basin Sheet pile shall have a reinforced concrete cap based on the detail provided For exterior sheet pile wall, compacted structural sand fill shall be placed or graded at a

maximum slope of 3:1 to ensure the exposed height of sheet pile bulkhead is no greater than six (6) feet and projects to the basin bottom at EL. +12.0

Tie back system shall be based on a maximum spacing of six (6) feet and be HDG steel with a minimum diameter of ¾ inch

Tie back rods for exterior and inner walls shall be staggered so to avoid conflict and be approximately 3’ apart

Tie rod anchoring exterior sheet pile wall shall extend under articulating block and extend by means of a mechanical connection through the inner wall and a minimum horizontal distance of fifteen (15) feet

Tie rod anchoring inner sheet pile wall shall extend a minimum of nineteen (19) feet behind the wall

Steel hot dip galvanized tie-rod for tie back system shall have a minimum diameter of ¾ inches

Anchor for tie-back shall be either reinforced concrete (4,000 psi concrete for foundation use) or driven HDG earth anchors with a required proof load of 12,000 pounds per anchor

Delivery and Storage Upon delivery of materials to site, contractor shall visually inspect all materials for defects or damage. If serious defect or damage is detected, contractor shall notify engineer immediately. Store bundled sheet piling on a relatively level surface with a slight pitch to allow water to drain. Contractor should not break bundled sheets until ready for immediate installation. Submittals with Bid

Contractor is to provide vinyl sheet pile submittals as noted above with initial bid package. Complete descriptions of sheet piling driving equipment including hammers, extractors,

protection caps and other installation appurtenances Describe the order and sequence for construction Provide line item pricing for potential variations in cost (e.g. sheet lengths, earth anchors,

concrete deadman, coquina rip rap, excavation, and embankment, etc.) Bid packages without the indicated submittals will be rejected

Installation – General Sequence For each location contractor is to determine the proper sequence as well as “means and methods” of construction and submit description as noted above.

Install earth anchors Install driving guide, template or wale system to aid in driving a straight and plumb wall Drive sheet piling (preferably in pairs for ESP 8.5 or singles for ESP 4.1) with a small

vibratory hammer (preferred). Contractor shall monitor noise and vibration to ensure damage to adjacent homes does not occur

Mandrel, helmet or drive shoes may be required if driving through hard soil strata or obstructions. Water jetting shall not be allowed

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Under no circumstances shall the contractor cut-off or install shorter sheets without review and written authorization from engineer and the owner

Adequate precautions shall be taken to ensure that piles are driven plumb. Sheet piling shall not be driven more than ½ inch per foot out of plumb in the plane of the wall, nor more than 1/16 inch per foot “out” of plumb perpendicular to the plane of the wall, nor more than 1 inch per foot “in” of plumb perpendicular to the plane of the wall.

Piles driven out of interlock with adjacent piles or otherwise damaged shall be removed and replaced by new piles at the contractor’s expense

Connect tie-rods from anchors with all thread to double channel assembly within the cap Install drainage system and weep holes (as required). Backfill behind sheet pile in level compacted lifts (12” max. lift thickness). Compaction of

backfill shall be 95% based on ASTM D698. Testing of compaction shall be taken a minimum of three feet behind the wall. Maintain heavy equipment at least three feet from back of sheeting.

Form, place rebar, and pour concrete cap to encase steel

Payment Payment for vinyl sheet pile wall shall be as noted in the bid documents.

Mike Brennan Stormwater Manager City of Palm Coast 160 Cypress Point Parkway, Suite B106 Palm Coast, FL 32164 Re: Palm Coast SCADA for the Iroquois, North Ulysses and the South Ulysses Canals. Dear Mr. Brennan The City of Palm Coast notified us to provide a system to operate their canal gates using our instruments and controls. The City would like the system to operate in automatic; they would also like to perform adjustments from their office while in automatic. The third request was to operate the gate in manual while visiting the sites. Process Description: AWC, Inc has the experience and expertise to design a system to accommodate the above requirements. We can use the Pulsar Ultrasonic meter to measure the level in the canals, the Mission SCADA equipment, and the ABB controller can operate the process in manual/automatic. The Pulsar analog output 4-20 MA goes into the Mission SCADA and the ABB Controller. We can set the Controller set point to 21.0 feet of water. Then if the water level increases above 21.0 feet the controller will open the Valve actuator to allow water out of the valve until it reaches the set-point. This is the automatic operation. The controller also has manual operation on the local display. The SCADA (Mission) operation will be primarily automatic. Although adjustments can be performed while in the office using the Mission WEB page. Palm Coast personnel can open and close the valve, with 0 to 100% span.

Equipment Supplied: Below is a list of equipment needed for the Canal Gate Level Control Project. The following Mission, ABB and Pulsar equipment is for I-1 Iroquois Waterway Canal.

1. Part M803C Real Time Streaming Data for $ 1,995. 2. Part 275 Rainfall Monitoring System, cost $ 903. 3. Part 550 new account setup fee, one time charge, and $ 250. 4. Part 580 Data Service Fee for 2 years, cost $ 1,126.80. 5. Part 581 Single Expansion board 2 year fee $120.00. 6. Part 459 Analog output option board, cost $ 495.00 7. Start up and training, one time fee 1,500.00. 8. Pulsar transducer part db100300100000, 98 feet of cable cost $ 845.00. 9. Pulsar Ultra 3 Series Controller with 4-20 MA output, part 17111100004-

XOP cost $ 1,610.00 10. Hinged transducer mounting bracket $ 255. 11. ABB Commander 310 Controller, part C3120/01/1/1/STD wall mount. Power

is 115 VAC with RS 485 MODBUS. Cost is $ 1,500. 12. NEMA 12X 5R Fiberglass panel part AM24208RL, Back panel part PA 2420

with a locked latch. $ 700. 13. Shipping $200.00

The below information is included for the I-4 North Ulysses Waterway canal.

14. Part M803C Real Time Streaming Data for $ 1,995. 15. Part 580 Data Service Fee for 2 years, cost $ 1,126.80. 16. Part 581 Single Expansion board 2 year fee $120.00. 17. Part 459 Analog output option board, cost $ 495.00 18. Pulsar transducer part db100300100000, 98 feet of cable cost $ 845.00. 19. Pulsar Ultra 3 Series Controller with 4-20 MA output, part 17111100004-

XOP cost $ 1,610.00 20. ABB Commander 310 Controller, part C3120/01/1/1/STD wall mount. Power

is 115 VAC with RS 485 MODBUS. Cost is 1,500. 21. Hinged transducer mounting bracket $ 255. 22. NEMA 12X 5R Fiberglass panel part AM24208RL, Back panel part PA 2420

with a locked latch. $ 700. 23. Shipping $200.00

The below information is for the I-6 South Ulysses Waterway Canal.

24. Part M803C Real Time Streaming Data for $ 1,995. 25. Part 580 Data Service Fee for 2 years, cost $ 1,126.80. 26. Part 581 Single Expansion board 2 year fee $120.00. 27. Part 459 Analog output option board, cost $ 495.00 28. Pulsar transducer part db100300100000, 98 feet of cable cost $ 845.00. 29. Pulsar Ultra 3 Series Controller with 4-20 MA output, part C3120/01/1/1/STD

wall mount. Power is 115 VAC with RS 485 MODBUS. Cost is $ 1,610. 30. Hinged transducer mounting bracket $ 255. 31. ABB Commander 310 Controller, part C3120/01/1/1/STD wall mount. Power

is 115 VAC with RS 485 MODBUS. Cost is $ 1,500. 32. NEMA 12X 5R Fiberglass panel part AM24208RL, Back panel part PA 2420

with a locked latch. $ 700. 33. Shipping $200.00

Total cost is $29,193.40. Project Needs.

1. Each Panel will need 120 VAC power for the Mission Unit, ABB Controller and the Pulsar Transmitter.

2. Each Pulsar Transducer will need a minimum 1 inch conduit. Nothing else can run in the conduit.

3. We will need a conduit at the valve actuator for 2 Beldon cables. These cables will have 20 gauge twisted pair wires, and be shielded with a ground.

4. These cables are for the Feedback percent 0 to 100%, and the 4-20 MA input to modulate the actuator.

5. The contractor is responsible for mounting the panel, installing the equipment inside the panel, and running the wires to and from the Valve actuator. Also mounting the transducer bracket and the transducer and pulling the wire inside the panel.

6. AWC will terminate the wires inside the panel.

Thank you for your confidence in our ability to serve you. We welcome the opportunity to assist you in your business and look forward to a continuing relationship which will be profitable to all concerned. Our staff is available to you. Should the need arise, please give us a call.