Addendum No. 3 Page 1 of 2 ADDENDUM NO. 3 June 14, 2013 PROJECT: Repair of Independence Mill Dam Independence, Wisconsin ISSUED BY: Aubian Engineering Inc. 619 Menomonie Street Eau Claire, WI 54703 715-864-9900 This addendum forms part of the Contract Documents and modifies, explains, or corrects the original Bidding Documents as noted below. Please attach this addendum to the documents now in your possession. Acknowledge receipt of this addendum in the space provided on the Bid Form. CHANGES TO PROJECT MANUAL Item 3-1. TABLE OF CONTENTS . Delete Page 2 of the Table of Contents and substitute revised Page 2 attached. Appendix D – WDNR Plan Approval has been added. CHANGES TO BIDDING REQUIREMENTS Item 3-2. BID FORM . Delete Page 1 of the Bid Form and substitute revised Page 1 attached. The steel sheet piling quantity has been revised. CHANGES TO SPECIFICATIONS Item 3-3. 01500 Construction Dewatering/1.13 Field Offices . Add the following paragraphs: B. Field offices and Contractor’s staging area shall be located on the empty lot between the Post Office and Arcadia State Bank/NAPA just south of Cedar Street on the north side of Elk Creek River. Refer to the attached sketch, Dam-Staging Area. C. Staging area shall be restored to original condition after removal of contractor’s field offices, equipment and materials. Item 3-4. 03360 Flowable Fill . Delete the Section in its entirety and replace with the attached revised Section. Section revised to add additional acceptable materials for mix and Contractor options for the mix. CHANGES TO APPENDICES Item 3-5. APPENDIX D . Add the attached Wisconsin Department of Natural Resources Plan Approval. Note requirement for submittal of proposed cofferdam before proceeding with construction.
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Addendum No. 3
Page 1 of 2
ADDENDUM NO. 3
June 14, 2013 PROJECT: Repair of Independence Mill Dam Independence, Wisconsin ISSUED BY: Aubian Engineering Inc. 619 Menomonie Street Eau Claire, WI 54703 715-864-9900 This addendum forms part of the Contract Documents and modifies, explains, or corrects the original Bidding Documents as noted below. Please attach this addendum to the documents now in your possession. Acknowledge receipt of this addendum in the space provided on the Bid Form. CHANGES TO PROJECT MANUAL Item 3-1. TABLE OF CONTENTS. Delete Page 2 of the Table of Contents and substitute
revised Page 2 attached. Appendix D – WDNR Plan Approval has been added. CHANGES TO BIDDING REQUIREMENTS Item 3-2. BID FORM. Delete Page 1 of the Bid Form and substitute revised Page 1
attached. The steel sheet piling quantity has been revised. CHANGES TO SPECIFICATIONS Item 3-3. 01500 Construction Dewatering/1.13 Field Offices. Add the following
paragraphs:
B. Field offices and Contractor’s staging area shall be located on the empty lot between the Post Office and Arcadia State Bank/NAPA just south of Cedar Street on the north side of Elk Creek River. Refer to the attached sketch, Dam-Staging Area. C. Staging area shall be restored to original condition after removal of contractor’s field offices, equipment and materials.
Item 3-4. 03360 Flowable Fill. Delete the Section in its entirety and replace with the
attached revised Section. Section revised to add additional acceptable materials for mix and Contractor options for the mix.
CHANGES TO APPENDICES Item 3-5. APPENDIX D. Add the attached Wisconsin Department of Natural Resources
Plan Approval. Note requirement for submittal of proposed cofferdam before proceeding with construction.
Addendum No. 3
Page 2 of 2
ATTACHMENTS Table of Contents, Page 2 of 2 (Revised) Bid Form, Page 1 of 4 (Revised) Section 01500 – Temporary Facilities and Controls, Added Sketch – Dam Staging Areas Section 03360 – Flowable Fill (Revised) (4 pages) Appendix D – WDNR Plan Approval (4 Pages) ***
A-101 Dam Plan and Sections A-102 Roller Gate Bay & Details
APPENDICES
A Hydrologic and Hydraulic Data B Underwater Inspection Report C Informational Project Drawings D WDNR Plan Approval
***
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Page 1 of 4 (Revised – Add3)
BID FORM
PROJECT: Independence Mill Dam Repair Independence, Wisconsin BID DEADLINE: June 20, 2013 2:00 P.M., Local Time We (Name of Bidder) acknowledge that we have received the Contract Documents prepared by Aubian Engineering Inc. that are listed in the Project Manual Table of Contents. We hereby agree to provide all labor, materials, equipment, and services required to complete the work in strict accordance with the Contract Documents for the following stated amount(s). BASE BID All work required to fully complete the project in accordance with the Contract Documents, including the following unit quantities: 15 Cubic Yards of Concrete - Masonry Piers and Walls 34 Cubic Yards of Concrete - Flowable Fill 1210 Square Feet of Steel Sheet Piling 25 Tons of Supplemental Riprap Total Amount for Base Bid shall be Dollars ($ ) UNIT PRICES Unit Prices shall be given and, if included in the Contract, will be used for additions to or deletions from amount of work required under the Contract. Final payment for all Unit Price bid items will be based on actual quantities, determined as provided in the Contract Documents. Bidder acknowledges that each Unit Price includes an amount considered by Bidder to be adequate to cover Contractor’s overhead and profit for each separately identified item. Item No. Description Unit Unit Price 1 Concrete - Masonry Piers and Walls C.Y. 2 Concrete - Flowable Fill C.Y. 3 Steel Sheet Piling S.F. 4 Supplemental Riprap Ton AWARD A single prime contract will be awarded on the basis of lowest responsible base bid amount in the Owner’s best interests.
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Contractor’s Staging Area
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03360-1 (Revised - Add3)
SECTION 03360
FLOWABLE FILL PART 1 - GENERAL 1.01 Summary A. Flowable fill will be used to backfill scour holes and voids beneath the spillway stilling basin apron as shown on the drawings. 1.02 Related Sections:
Section 02220 – Demolition Section 02315 – Excavating and Filling
1.03 References A. ASTM International:
1. ASTM C33 - Standard Specification for Concrete Aggregates. 2. ASTM C94/C94M - Standard Specification for Ready-Mixed Concrete. 3. ASTM C150 - Standard Specification for Portland Cement. 4. ASTM C260 - Standard Specification for Air-Entraining Admixtures for Concrete. 5. ASTM C403/C403M - Standard Test Method for Time of Setting of Concrete
Mixtures by Penetration Resistance. 6. ASTM C494/C494M - Standard Specification for Chemical Admixtures for
Concrete. 7. ASTM C618 - Standard Specification for Coal Fly Ash and Raw or Calcined Natural
Pozzolan for Use as a Mineral Admixture in Concrete. 8. ASTM C1017/C1017M - Standard Specification for Chemical Admixtures for Use in
Producing Flowing Concrete. 9. ASTM D 4832: Standard Test Method for Preparation and Testing of Controlled
Low Strength Testing Materials (CLSM) Test Cylinders. 10. ASTM D 6023 - Standard Test Method for nit Weight, Yield and Air Content
(Gravimetric) of Controlled Low Strength Material. 11. ASTM D 6103 – Standard Test Method for Flow Consistency of Controlled Low
Strength Material. 1.04 Submittals A. Provide a Flowable Fill Plan containing the following information:
1. Submit the name(s) of flowable fill materials suppliers intended for use. Provide a Manufacturer's Certificate indicating that products meet or exceed specified requirements.
2. A schematic of pumps and piping used to place Flowable Fill. 3. Submit flowable fill mix design for specified strength. Submit separate mix designs
when admixtures are required for the following: a. Flowable fill work during hot and cold weather. b. Air entrained flowable fill work.
4. Identify design mix ingredients, proportions, properties, admixtures, and tests. 5. Submit test results to certify flowable fill mix design properties meet or exceed
specified requirements.
03360-2 (Revised - Add3)
B. Submit delivery tickets indicating actual materials delivered to Project site.
C. Approval by Engineer of Contactor submittals shall not alleviate Contractor’s responsibilities for completing the work as specified. 1.05 Quality Requirements A. Flowable Fill Plan shall require approval of the Engineer before delivery and placement of flowable fill. B. Do not install flowable fill during inclement weather or when ambient temperature is less than 40 degrees F. C. Defective Flowable Fill: Fill delivered without proper documentation shall be rejected and replaced at the direction of Engineer.
1.06 Qualifications A. The proposed company specializing in manufacturing the products specified in this section shall have a minimum of three years documented experience in providing flowable fill mixes comparable to the specifications herein.
1.07 Definitions A. Flowable Fill: Lean cement concrete fill used where future excavation is not anticipated such as to fill lower portions of demolished structures and voids beneath concrete slabs. PART 2 - PRODUCTS 2.01 General A. Contractor shall be responsible for calculation of required volumes of flowable fill based on Drawings, consultations with Engineer, estimates of wastage during delivery, and placement, experience with similar materials, and other factors as identified by Contractor.
B. Contractor shall be responsible for all costs associated with delays or material quantity shortfalls due to volume miscalculations, or required rework resulting from not meeting material or placement specifications.
2.02 Cement A. ASTM C150, Type I or II, low-alkali containing less than 0.60 alkalies.
2.03 Pozzolan A. ASTM C618, Class F, fly ash having the following properties:
1. Loss on ignition limited to a maximum of 2.5 percent. 2. Contain less than 4 percent sulfur trioxide by weight.
B. Pozzolan shall be furnished from the same source and supplier for all flowable fill and that used in the submitted mix designs. Pozzolan from another source other than that used in approved mix designs shall be rejected.
2.04 Water A. Clean, potable and free from oil, salt, acid, alkali, organic matter, or other deleterious substances.
03360-3 (Revised - Add3)
2.05 Fine Aggregate A. Hard, dense durable particles of either sand or crushed stone regularly graded from coarse to fine, free from loam, clay, lumps and foreign material. Maximum size aggregate for fine aggregate Flowable Fill shall pass a 3/8-inch sieve.
B. Conform to ASTM C33. Local aggregates not complying with ASTM C33 but which have shown by test and actual service to produce concrete of adequate strength and durability may be submitted for approval.
C. The fineness modulus of the fine aggregate shall not be less than 2.3 or more than 3.1, nor vary by more than 0.20 from the value assumed in selecting proportions of the flowable fill.
D. Aggregates for all flowable fill shall be from the same source quarry used to develop flowable fill mixes.
2.06 Admixtures A. Air Entrainment: Conform to ASTM C260 and be compatible with water reducing and any other admixture. If air-entraining cement is used, any additional air-entraining admixture shall be of the same type as that in the cement.
2.07 Mixes A. Provide Flowable Fill containing cement and water. At the Contractor’s option, Flowable Fill may also contain fly ash, fine aggregate or chemical admixtures in any proportions such that the final product meets the strength and flow consistency requirements include in this specification.
B. Mix and deliver flowable fill in accordance with ASTM C94/C94M, Option C.
C. Flowable Fill Design Mix:
ITEM REQUIREMENT
Cement Content 50 - 125 pcy
Fly Ash Content 150 - 600 pcy
Water Content 325 - 600 pcy
Fine Aggregate None to 3000 pcy
Flowability (ASTM D6103) Minimum of 8 inches
28 Day Compressive Strength Minimum 125 psi;
Air Entrainment 5-15 percent
Unit Mass (Wet) 100-125 pcf
D. Provide water content in design mix to produce self-leveling, flowable fill material at time of placement.
E. Design mix air entrainment and unit mass are for laboratory design mix and source quality control only.
03360-4 (Revised - Add3)
2.04 Source Quality Control A. Prepare delivery tickets containing the following information:
1. Project Designation. 2. Date and time. 3. Class and Quantity of flowable fill. 4. Actual batch proportions.
PART 3 - EXECUTION
3.01 Examination A. Verify structure or excavation is dry and free of debris and ready to be filled.
3.02 Preparation A. If necessary, dry excavation and remove debris.
B. Block any openings that would allow flowable fill to extend into areas not to be backfilled.
3.03 Protection A. Protect reservoir, creek and wetlands from any and all materials used during fill process, including fill, admixtures, oil and grease, loose debris, and chemicals.
3.04 Field Quality Control A. Ensure that batch tickets match approved design mixture.
3.05 Placement A. Place flowable fill by chute, pumping or other methods as approved by Engineer.
B. If needed, place flowable fill in lifts to allow inspection of placement after each lift.
C. Place flowable fill to ensure filling of corners, areas around existing columns or other features.
D. Place flowable fill to elevations indicated on Drawings without vibration or other means of consolidation.
3.06 Cleaning A. Remove spilled and excess flowable fill from Project site.
B. Restore facilities and site areas damaged or contaminated by flowable fill installation to existing condition before installation.
