P MWC ADDENDUM # 2 Issue Date: January 6, 2016

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1 ADDENDUM # 2 Issue Date: January 6, 2016 The Purpose of this Addendum # 2 is to provide the following Items: This Addendum No. 2 consists of: 1. Attachment 1 Updated Schedule of Bid Items (2 Pages) 2. Attachment 2 Cable Concrete Revetment System Specification for General Applications (6 Pages) 3. Attachment 3 Questions and Answers (1 Page) 4. Attachment 4 Pre-Bid Meeting Sign-In Sheet (1 Page) 5. Substantial completion, to allow for commencement of Phase II, must be accomplished by May 27th, All other specifications remain unchanged. All inquiries during the bid and bid evaluation process must be directed to the OSU Purchasing Department at , fax , or purchase@okstate.edu.

2 Addendum 2 - Attachment 1 NORTH INTRAMURAL SOCCER FIELDS, PHASE I SCHEDULE OF BID ITEMS BASE BID ITEM NO. SPEC. NO. ITEM DESCRIPTION UNIT QUANTITY UNIT COST BID AMOUNT 1 202(A) UNCLASSIFIED EXCAVATION CY 70, (D) UNCLASSIFIED BORROW CY (A) TYPE A-SALVAGED TOPSOIL LSUM SWPPP DOCUMENTATION AND MANAGEMENT LSUM (C) TEMPORARY SILT FENCE LF 5, (D) TEMPORARY SEDIMENT FILTER EA (F) TEMPORARY SILT DIKE LF (A) SOLID SLAB SODDING SY 22, (A) SEEDING METHOD A AC (A) AGGREGATE BASE TYPE A CY 1, (D) LIME TON (H) LIME STABILIZED SUBGRADE SY 7, SEPARATOR FABRIC SY 7, (D) CLASS C CONCRETE CY SPECIAL ARTICULATED CONCRETE BLOCK REVETMENT SF 1, (I) FILTER FABRIC (RIPRAP) SY (A) 2'-8" COMBINED CURB & GUTTER (6" BARRIER) LF (A) 4" CONCRETE SIDEWALK SY (B) 6" CONCRETE DRIVEWAY SY (I) TACTILE WARNING DEVICE SF (B) REMOVAL OF FENCE LF 4, MOBILIZATION LSUM (B) CONSTRUCTION STAKING LEVEL II LSUM (B) 1" PVC SCH. 40 PLASTIC CONDUIT TRNCHED LF (A) TRAFFIC STRIPE (PAINT) (4" WIDE) LF (B) TRAFFIC STRIPE (PAINT) (SYMBOL) EA (J) CONSTRUCTION TRAFFIC CONTROL LSUM 1 28 SPECIAL ABANDON EXISTING UTILITY LINES LSUM 1 29 SPECIAL PRE-CAST CONCRETE WHEEL STOP EA (E) 12" CORRUGATED POLYETHYLENE PIPE TYPE "S" LF (E) 24" CORRUGATED POLYETHYLENE PIPE TYPE "S" LF (E) 30" CORRUGATED POLYETHYLENE PIPE TYPE "S" LF (E) 36" CORRUGATED POLYETHYLENE PIPE TYPE "S" LF 127 Page 1 of 2

3 Addendum 2 - Attachment 1 NORTH INTRAMURAL SOCCER FIELDS, PHASE I SCHEDULE OF BID ITEMS BASE BID ITEM NO. SPEC. NO. ITEM DESCRIPTION UNIT QUANTITY UNIT COST BID AMOUNT (E) 42" CORRUGATED POLYETHYLENE PIPE TYPE "S" LF (M) TYPE A6 SLOPED CONCRETE END SECTION EA (M) TYPE C6 SLOPED CONCRETE END SECTION EA 3 37 SPECIAL 30" HDPE END CAP EA 1 38 SPECIAL ADS 18" INSERTA TEE (OR APPROVED EQUAL) EA 1 39 SPECIAL ADS 24" INSERTA TEE (OR APPROVED EQUAL) EA 5 40 SPECIAL ADS 30"X36" REDUCER (OR APPROVED EQUAL) EA 1 41 SPECIAL ADS 36"X42" REDUCER (OR APPROVED EQUAL) EA 1 42 SPECIAL ADS 2'X3' STEL BAR GRATE (OR APPROVED EQUAL) EA 5 43 SPECIAL ADS 2'X2" CURB INLET STANDARD GRATE (OR APPROVED EQUAL) EA ' I.D. MANHOLE EA CONNECTION TO EXISTING MANHOLE EA " PVC PIPE, SDR 26 LF "x4" TEE & RISER EA " STEEL CASING (1/4" WALL THICKNESS)(BORED) LF 38 BASE BID TOTAL Use this form to complete your Base Bid and Record it on Page "Bid 3" of the bid package. Page 2 of 2

4 CABLE CONCRETE REVETMENT SYSTEM SPECIFICATION FOR GENERAL APPLICATIONS PART 1: GENERAL 1.1. Scope of Work The work covered by this Section consists of furnishing all labor, materials, equipment, and incidentals required and of performing all operations in connection with the installation of cable concrete erosion control mats in accordance with the lines, grades, design, and dimensions shown on the Contract Drawings and as specified herein References The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only. A. American Society for Testing and Materials (ASTM) Publications. ASTM C Concrete Aggregates ASTM C B Sampling and Testing Concrete Masonry Units ASTM C Grout for Masonry ASTM D Moisture Density Relationship of Soils B. U.S. Federal Highway Administration (FHWA) and U.S. Bureau of Reclamation (USBR) Report. FHWA-RD Hydraulic Stability of Articulated Concrete Block Revetment Systems During Over-topping Flow Submittal A. Shop Drawings. At least 30 days prior to the start of any installation of the cable concrete mats, the Contractor shall submit to the owner shop drawings for the layout and details of the cable concrete mats. The shop drawings shall include layout, layout sequence, mat junction details, and details for grade change. B. Certificates of Compliance. The Contractor shall furnish the manufacturer's certificates of compliance for cable concrete blocks/mats, revetment cable, and any revetment cable fittings and connectors. The Contractor shall also furnish the manufacturer's specifications, literature, shop drawings for the layout of the mats, and any recommendations, if applicable, that are specifically related to the project. 1 Page 1 of 6

5 C. Alternative materials may be considered. Submittal packages must include, as a minimum, the following: 1. Test results documenting that the revetment system has been tested under controlled flow conditions for hydraulic performance characteristics in accordance with FHWA-RD , utilizing a 2:1 slope in the direction of flow. 2. A list of 5 comparable projects, in terms of size and applications, in the United States, where the results of the specific alternate revetment system used can be verified after a minimum of one (1) year of service life Measurement of Cable Concrete Mattresses The unit of measurement for the cable concrete mattresses shall be by the square foot of cable concrete mattresses placed Payment Payment for acceptable cable concrete mattresses placed will be made at the contract unit price per square foot for Articulated Concrete Block Revetment. Prices shall include all costs for furnishing, hauling, and placing the cable concrete mattresses as specified herein and as shown on the drawings. Cable clamps, clips, anchors, lifting bar rental, mobilization, delivery, and geotextile fabric, shall be included in Articulated Concrete Block Revetment unit price Delivery, Storage, and Handling of Materials A. Delivery and Storage. Materials delivered to the site shall be inspected for damage, unloaded, and stored with the minimum of handling. Materials shall be kept free of dirt and debris. B. Blocks rejected prior to delivery from the point of manufacture shall be replaced at the manufacturer's expense. Blocks rejected at the job site shall be repaired with structural grout or replaced at the expense of the contractor. C. Handling. Materials shall be handled in such a manner as to ensure delivery to the site in sound, undamaged condition. Synthetic geotextiles that are not to be installed immediately shall be protected from the direct sunlight and in accordance with the manufacturer s recommendations. 2 Page 2 of 6

6 PART 2: PRODUCT 2.1. General The cable concrete system shall be made up of 8 wide x 16 length mats placed side by side and clamped together to provide one homogeneous erosion protection system. Irregular mat sizes may be provided depending on project requirements. All mats shall be prefabricated as an assembly of concrete blocks interlocked with integrally poured revetment cables. The cables shall traverse through each block in both longitudinal and lateral directions of the mat system and shall form lifting loops on all sides of the mats. The truncated pyramid-shaped blocks shall have 11.5 square top faces and 15.5 square bottoms. A geotextile fabric shall be installed on the sub base prior to installation of the mats, unless otherwise specified Approved Suppliers A. Cable Concrete shall be manufactured by International Erosion Control Systems (IECS) or an approved IECS manufacturing facility. Contact: Sarah Kellert (918) , sarah@kellertconsulting.com. B. Approved equals. Proposed equals must be approved by the Engineer. The owner or his engineer reserves the right to accept or reject any proposed equal revetment system for reasons including but not limited to previous performance record, appropriate and applicable testing, hydraulic performance characteristics, and qualified technical support. Minimum information required for approved equivalent is specified in Section 1.3.C Materials for Cable Concrete Blocks A. Concrete shall conform to ACI requirements for normal weight concrete and shall have a minimum compressive strength of 4,000 psi at 28 days when tested in accordance with ASTM C B. Concrete shall include air entrainment of 4% to 7%. All ASTM standards shall be met in the production of the concrete. The finished concrete product shall consist of a minimum density of 140 pcf in an average of 3 units. No individual block shall consist of a minimum concrete density lower than 135 pcf. B. Cementitious Materials - Materials shall conform to the following applicable ASTM specifications: 1. ASTM C150 - Specification for Portland Cement 2. ASTM C207 - Specification for Hydrated Lime Types 3. ASTM C595 - Specifications for Blended Hydraulic Cements 4. ASTM C618 - Specifications for Fly Ash and Raw or Calcined Natural Pozzolans for use in Portland Cement 3 Page 3 of 6

7 C. Aggregates shall conform to the following ASTM specifications, except that grading requirements shall not necessarily apply: 1. ASTM C33 - Specification for Concrete Aggregates D. Cable concrete blocks shall be wet cast using concrete as specified herein. E. The cable concrete mat shall have the following minimum requirements: MAT BLOCKS AREA (8 X 16 ) 128 S.F. WEIGHT 4,864 lbs per mat min BLOCKS/ MAT 72 blocks per mat BASE 0.5 TOP 4.5 WEIGHT lbs per block HEIGHT Revetment Cables The revetment cables shall be made of 16 Carrier Diamond Braid, multiplied 1000 denier polyester filament, with a polyester filament core. The cable shall be of type 20mm construction. Cables shall be poured integrally with the concrete block. UV degradation protection must be maintained when polyester cord is used. The mats must be covered, backfilled, or submerged under water to provide the protection Clamps The Aluminum C Clips shall be used to secure loops of adjoining Cable Concrete mats. The standard placement of clips shall be placed on 4 centers interlocking adjoining mats together. In slope applications greater than 2 to 1 where the mats are placed end to end, clip placement interlocking adjoining mats shall be specified by the Design Engineer Certification (Open-Channel Flow) Cable concrete mats will only be accepted when accompanied by documented hydraulic performance characteristics that are derived from tests under controlled flow conditions. Testing guidelines should conform to U.S. Federal Highway Administration and U.S. Bureau of Reclamation Testing Protocol as documented in Minimizing Embankment Damage During Overtopping Flow, Report No. FHWA-RD and all hydraulic performance testing shall be performed in a 2H:1V flume. 4 Page 4 of 6

8 2.7. Geotextile Filter Fabric The geotextile material used on non-specific projects is an 8 oz. needle punched nonwoven fabric. The Engineer shall specify the requirement and the type of geotextile. During all periods of shipment and storage, the filter fabric shall be protected from direct sunlight, ultraviolet rays, and temperatures greater than 140 degrees Fahrenheit. To the extent possible, the fabric shall be maintained wrapped in its protective covering. The geotextile shall not be exposed to sunlight, ultraviolet rays until the installation process begins. PART 3: INSTALLATION 3.1. Foundation Preparation Areas on which filter fabric and cable concrete mattresses are to be placed shall be constructed to the lines and grades shown on the Contract Drawings. The subgrade for the cable concrete mats shall be free of voids, pits, or depressions and shall be proofrolled to a minimum of 90% of the ASTM D 698 density. Voids, pits, or depressions shall be brought to grade by backfilling in accordance with the applicable portions of the project specifications. All obstructions, such as roots and projecting stones larger than 1 inch remaining on the surface, shall be removed. All of the soft or low density pockets of material removed must be filled with selected material and compacted to a minimum of 90% of the ASTM D 698 density. Excavation and preparation for anchor trenches, side trenches, and toe trenches or aprons shall be done in accordance to the lines, grades, and dimensions shown in the Contract Drawings. Immediately prior to placing the filter fabric and cable concrete blocks, the prepared subgrade shall be inspected by the Engineer as well as the Owner's Representative. No fabric or blocks shall be placed until the project site has been approved by each of these parties Placement of Geotextile Filter Fabric The geotextile shall be placed within the limits shown on the Contract Drawings. The geotextile shall be placed directly on the prepared area, in intimate contact with the subgrade, and free of folds or wrinkles. The geotextile filter fabric shall be placed so that the upstream strip of fabric overlaps the downstream strip. The longitudinal and transverse joints shall be overlapped at least two (2) feet. The geotextile shall extend at least one foot beyond the top and bottom revetment termination points. 5 Page 5 of 6

9 3.3. Placement of Cable Concrete Blocks/Mats Cable concrete mats shall be placed within the specified lines and grades shown on the Contract Drawings. The cable concrete mats shall be placed on the filter fabric in such a manner as to produce a smooth plane surface in intimate contact with the filter fabric. If assembled and placed as large mattresses, the cable concrete mats shall be attached to a spreader bar or other approved device to aid in the lifting and placing of the mats in their proper position by the use of a crane or other approved equipment. The equipment used should have adequate capacity to place the mats without bumping, dragging, tearing, or otherwise damaging the underlying fabric. The mats shall be placed side-by-side and/or end-to-end, so that the mats abut up to and are in intimate contact with each other. The maximum space or gap between mattresses shall be 2 inches, except that local wider gaps may be accepted if the length of the gap is less than 2 feet, and the entire gap is grouted. The outside edges of the mat system shall be toed in at least one block with trenches. Anchor trenches and side trenches shall be backfilled and compacted flush with the top of the blocks. Toe trenches shall be backfilled as shown on the Contract Drawings. Backfilling and compaction of trenches shall be completed in a timely fashion. No more than 500 linear feet of placed cable concrete blocks with non-finished toe trenches shall be permitted at any time. If required on the plans, the voids of the cable concrete mats for the limits shown on the Contract Drawings shall be filled with topsoil. The soil shall then be seeded per the Engineer or Owner s Representative. Backfilling and compaction shall be completed in a timely manner so that no more than 500 feet of exposed mats exist at any time On-Site Consultation The manufacturer of the cable concrete blocks/mats shall provide design and construction advice during the design and initial installation phases of the project when required. A manufacturer s representative shall be on site periodically throughout installation as required by the Owner s Representative. 6 Page 6 of 6

10 Attachment 3 Q&A Addendum #2 Questions and Answers 1. Pay Item Note 15 mentions the slurry method of stabilization. This isn t readily available. We have always used the quick lime & add water when mixing for all other OSU projects. Is this an acceptable method for this project? a. Lime Stabilization may be completed by other methods outlined in the Specifications. The contractor will not be restricted to the slurry method. 2. Will the water needed for this project be provided at no cost by OSU? Is there a charge for a meter? a. The contractor will be responsible for providing water needed to construct this project. OSU will not provide free water. 3. Who is responsible for filing the NOI on the storm water? a. The Notice of Intent has been completed for the purposes of obtaining a City of Stillwater permit. However, the Contractor is responsible for submitting to the Oklahoma Department of Environmental Quality. 4. Will OSU furnish and pay for soil testing? a. Testing shall be provided by the contractor and shall be completed by an AMRL Accredited Laboratory in accordance with the Oklahoma Department of Transportation 2009 FAST Guide. Work will not be accepted without evidence of passing tests. 5. Aggregate for parking area calls for Type A base, are we to assume this is 1 1/2 ODOT? a. Replace the Bid Schedule with the attached. Riprap has been replaced by Articulated Concrete Block Revetment. A specification is also attached. Page 1 of 1

11 Addendum 2 - Attachment 4 Page 1 of 1