2013 ANNUAL AIRFIELD PAVEMENT REHABILITATION CONTRACT NO ADDENDUM NUMBER TWO. Scope of this Addendum

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2 D E N V E R I N T E R N A T I O N A L A I R P O R T CONTRACT NO ADDENDUM NUMBER TWO Scope of this Addendum Addendum Number Two includes modifications to the following Contract Documents issued February 21, These modifications are deemed necessary by the City and County of Denver. PART ONE, VOL. 1 - CONTRACT DOCUMENTS Bid Forms Revisions: o Remove Bid Form dated 2/06/2013 and replace with attached Bid Form. The following bid items were added: P-150g Remove Asphalt Pavement (10 Depth) P-150h Remove Concrete Curb and Gutter P-610b Install Concrete Curb and Gutter Project Requirements: o o SC-5 CONTRACTOR PERFORMANCE; SUBCONTRACTING With respect to General Condition 501, no more than 40% of the work may be subcontracted. o This percentage was increased from 30%. PART TWO, VOL. 2 TECHNICAL SPECIFICATIONS Division II - Technical Specifications Revisions o Remove Appendix A dated January 2013 and replace with attached Appendix A dated February 28, 2013 o Remove Appendix B dated January 2013 and replace with attached Appendix B dated February 28, 2013 The total number of pages (including cover sheet) contained in this Addendum Number Two is Thirty Three (33). * * * * * * * End of Addendum Number Two

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9 P-150 DEMOLITION PART 4 METHOD OF MEASUREMENT 4.01 Removal of pavement shall be measured per square yard based on the area shown on the plans. Any pavement removed outside the designed limits of removal because the pavement was damaged by negligence on the part of the Contractor shall not be included in the measurement for payment. The thickness of the existing material to be removed is approximate only and the Contractor will not be reimbursed for areas that may be thicker than shown on the plans. Removal of pavement shall include all sawcutting of pavement necessary to facilitate removal Pavement marking removal shall be measured per square foot Removal of base cans, surface sensor, light fixtures, detector loops, or headwalls/wingwalls shall be measured per each. The removal of taxiway edge lights and includes all conduit and cable. The removal of the detector loops shall include all sawcutting of pavement necessary to facilitate removal Removal of area drains and pipe shall be measured per linear foot. PART 5 BASIS OF PAYMENT 5.01 Payment shall be made at the contract unit price per square yard for each type of pavement material removed. This price shall be full compensation for furnishing all materials, and for all labor, equipment, tools, and incidentals necessary to complete the item Payment shall be made at the contract unit price per square foot for pavement marking removal. This price shall be full compensation for furnishing all materials, and for all labor, equipment, tools, and incidentals necessary to complete the item Payment shall be made at the contract unit price per each for base cans or headwall/wingwall removed. This price shall be full compensation for furnishing all materials, and for all labor, equipment, tools, and incidentals necessary to complete the item Payment shall be made at the contract unit price per linear foot for removal of area drains and pipe. This price shall be full compensation for furnishing all materials, and for all labor, equipment, tools, and incidentals necessary to complete the item. Payment shall be made under: P-150a Remove 17-Inch Reinforced Concrete Pavement... per square yard P-150b Remove 17-Inch Non-Reinforced Concrete Pavement... per square yard - 1

10 P-150c Pavement Marking Removal... per square foot P-150d Demolish L-868B Base Can, 22 Length... per each P-150e Demolish L-868C Base Can, 26 Length... per each P-150f Remove and Cap Area Drains and Pipe... per linear foot P-150g Remove Asphalt Pavement... per square yard P-150h Remove Concrete Curb and Gutter... per linear foot - 2

11 P-151 CLEARING AND GRUBBING PART 3 METHOD OF MEASUREMENT 3.01 Clearing and grubbing will not be measured for payment, but shall be considered incidental to Item P-152, Excavation and Embankment. PART 4 BASIS OF PAYMENT 4.01 Clearing and grubbing shall be considered incidental to Item P-152, Excavation and Embankment. No direct payment shall be made for clearing and grubbing. - 3

12 P-152 EXCAVATION AND EMBANKMENT PART 4 METHOD OF MEASUREMENT 4.01 The quantity of topsoil removal, stockpile, and replacement will be measured in its final place, per square yard The quantity of excavation to be paid for shall be the number of cubic yards measured in place by field survey. Measurement for excavation shall be to a vertical plane at the horizontal distances shown on the plans. Quantities for all excavations shall be computed by the average end area method in cross-sections taken at maximum 100 foot intervals. Measurement shall be based on the elevations of ground surface after stripping, between neat lines shown on the Contract Drawings The quantity of common and select embankments to be paid for shall be the number of cubic yards measured in place by field survey. No measurement shall be made due to foundation or embankment settlement. Measurement for select embankment shall be to a vertical plane at the horizontal distances shown on the plans. Any select embankment outside of the vertical slope or below the plan thickness shall be measured and paid for as common embankment. Quantities for all embankments shall be computed by the average end area method in cross-sections taken at maximum 100 foot intervals. Measurement shall be based on the elevations of ground surface after stripping, between neat lines shown on the Contract Drawings. No payment will be made due to over excavation. PART 5 BASIS OF PAYMENT 5.01 For "Unclassified Excavation, Export Off Site payment shall be made at the Contract unit price per cubic yard. This price shall be full compensation for furnishing all materials, labor, equipment, tools, and incidentals necessary to complete the item. It includes clearing and grubbing, excavating, hauling, haul roads, stockpiling, preparation of the embankment area, placing, spreading, shaping, maintaining ditches, disposing of unsuitable material, and conditioning and compacting of embankment materials. The volume will be determined based on 4.02 and Section 01025, paragraph 1.02C, Measurement by Volume For "DIA Upper Select Fill Borrow Embankment" payment shall be made at the Contract unit price per cubic yard. This price shall be full compensation for furnishing all materials, labor, equipment, tools, and incidentals necessary to complete the item. It includes excavating, hauling, haul roads, stockpiling, preparation of the embankment area, placing, spreading, conditioning, compacting, also includes clearing and grubbing, borrow area topsoil removal and replacement, blending, and all other operations required for the select material borrow areas. The scarifying, moisture conditioning, recompaction, and retesting of the top 8 of existing surfaces, or as shown on the drawings, shall be included in the unit price for DIA Upper Select Fill Borrow Embankment. - 4

13 Payment shall be made under: P-152a Unclassified Excavation, Export Off Site... per cubic yard P-152b DIA Upper Select Fill Borrow Embankment... per cubic yard P-152c Milling Existing Cement Treated Base..per square yard - 5

14 P-153 WATERING PART 4 METHOD OF MEASUREMENT 4.01 There shall be no direct measurement or payment for water required in the construction of this project. The work under this item shall be considered subsidiary to other items of work. PART 5 BASIS OF PAYMENT 5.01 Water shall be considered incidental to the project. No direct payment shall be made for water. - 6

15 P-161 GEOTEXTILE PART 4 METHOD OF MEASUREMENT 4.01 Bondbreaker fabric used in conjunction with pavement construction shall be measured by the number of square yards in-place based on the neat lines shown on the Drawings. No allowance will be made for materials in laps, seams, or for waste trimmed. PART 5 BASIS OF PAYMENT 5.01 Payment will be made at the contract unit price per square yard for bondbreaker fabric. The price shall be full compensation for furnishing and placing all material and for all labor, equipment, tools, and incidentals necessary to complete the work prescribed in this item. Payment shall be made under: P-161a Bondbreaker Fabric... per square yard - 7

16 P-162 CONTROLLED LOW-STRENGTH MATERIAL (CLSM) PART 4 METHOD OF MEASUREMENT 4.01 The quantity of CLSM shall be measured by number of cubic yards of completed and accepted base course. PART 5 BASIS OF PAYMENT 5.01 Payment shall be made at the contract unit price per cubic yard for CLSM base course. This price shall be full compensation for utilizing existing materials and for all preparation, delivering, placing and mixing of these materials; and for all labor, equipment, tools, and incidentals necessary to complete the work prescribed in this item. P-162a Repair Soil Cement Base with CLSM (Flowable Fill)... per cubic yard - 8

17 P-301 SOIL-CEMENT BASE COURSE PART 6 METHOD OF MEASUREMENT 6.01 The quantity of soil-cement base course shall be measured by number of square yards of completed and accepted base course The quantity of hydrated cement shall be measured by the ton. Weigh tickets or similar documentation shall be used to determine the actual amount of cement used. PART 7 BASIS OF PAYMENT 7.01 Payment shall be made at the contract unit price per square yard for soil-cement base course. This price shall be full compensation for utilizing existing materials (expect portland cement) and for all preparation, delivering, placing and mixing of these materials; and for all labor, equipment, tools, and incidentals necessary to complete the work prescribed in this item. The soil consists of the existing upper most twelve inches of in-place select embankment material. Pavement shall include only the cost of reprocessing/mixing the in-place select embankment material. Payment shall be made under: P-301a Soil-Cement Base Course (8-Inch)... per square yard - 9

18 P-401 PLANT MIX BITUMINOUS PAVEMENTS PART 7 METHOD OF MEASUREMENT 7.01 Plant mix bituminous pavement shall be measured per ton per the specified depth of bituminous mixture to be used in the accepted work. Recorded batch weights or truck scale weight will be used to determine the bases for the tonnage. PART 8 BASIS OF PAYMENT 8.01 Payment for accepted plant mix bituminous pavement shall be made at the contract unit price per ton adjusted in accordance with paragraph A. Payment shall be made under: P-401a Bituminous Surface Course (3-Inch)... per ton P-401b Bituminous Base Course (7-Inch)... per ton - 10

19 P-403 ASPHALT-TREATED PERMEABLE BASE PART 6 METHOD OF MEASUREMENT 6.01 Asphalt Treated Permeable Base (ATPB) shall be measured by the number of square yards as specified in-place, complete and accepted by the DIA Project Manager. PART 7 BASIS OF PAYMENT 7.01 Payment for an accepted Asphalt Treated Permeable Base (ATPB) shall be made at the full or adjusted contract unit price per square yard. This price shall be full compensation for furnishing all materials, for all preparation, mixing, and placing of these materials, and for all labor, equipment, tools, and incidentals necessary to complete the item. Payment shall be made under: P-403a Asphalt-Treated Permeable Base Course (5-Inch to 7-Inch)... per square yard - 11

20 P-501 PORTLAND CEMENT CONCRETE PAVEMENT PART 7 METHOD OF MEASUREMENT 7.01 Portland cement concrete pavement shall be measured by the number of square yards of either plain or reinforced pavement as specified in-place, complete and accepted by the DIA Project Manager. Portland cement concrete pavement transition areas from 17 to 21 shall be measured as 17 Portland cement concrete pavement, either plain or reinforced. Saw cutting for joints, dowel and tie-bar placement, steel reinforcement, and sealants as detailed in the drawings and specifications, shall be considered incidental, and shall not be measured separately Spall repair shall be measured by the number of square feet of spall repair as specified in-place, completed and accepted by the DIA Project Manager. Sawcutting, removal of existing pavement including chipping, sandblasting, rebar, and sealants as detailed in the drawings and specifications, shall be considered incidental, and shall not be measured separately Concrete blockouts shall be measured per each blockout installed and accepted by the DIA Project Manager. Rebar, reinforcing, and sealant as detailed in the drawings and specifications, shall be considered incidental, and shall not be measured separately Full depth repair shall be measured by the number of cubic yards of PCC repaired as specified inplace, completed and accepted by the DIA Project Manager. Sawcutting, removal of existing pavement including chipping, sandblasting, rebar, and sealants as detailed in the drawings and specifications, shall be considered incidental, and shall not be measured separately. PART 8 BASIS OF PAYMENT 8.01 Payment for accepted concrete pavement shall be made at the contract unit price per square yard adjusted in accordance with paragraph A Payment for spall repair shall be made at the contract unit price per square foot. This price shall be full compensation for furnishing all materials, for all preparation, mixing, and placing of these materials, and for all labor, equipment, tools, and incidentals necessary to complete the item Payment for concrete blockouts shall be made at the contract unit price per each. This price shall be full compensation for furnishing all materials, for all preparation, mixing, and placing of these - 12

21 materials, and for all labor, equipment, tools, and incidentals necessary to complete the item Payment for full depth repair shall be made at the contract unit price per cubic foot. This price shall be full compensation for furnishing all materials, for all preparation, mixing, and placing of these materials, and for all labor, equipment, tools, and incidentals necessary to complete the item. Payment shall be made under: P-501a 17-inch Portland Cement Concrete Pavement, Plain... per square yard P-501b 17-inch Portland Cement Concrete Pavement, Reinforced... per square yard P-501c Concrete Blockout... per each P-501d Spall Repair Around Light Can... per square foot P-501e Spall Repair... per square foot P-501f Full Depth PCC Pavement Repair... per cubic yard - 13

22 P-603 BITUMINUOUS TACK COAT PART 4 METHOD OF MEASUREMENT 4.01 There shall be no direct measurement or payment for tack coat. The work under this item shall be considered subsidiary to other items of work. PART 5 BASIS OF PAYMENT 5.01 Bituminous tack coat shall be considered incidental to the project. No payment shall be made for bituminous tack coat. - 14

23 P-604A PREFORMED EXPANSION JOINT COMPRESSION SEALS PART 6 METHOD OF MEASUREMENT 6.01 There shall be no direct measurement or payment for preformed expansion joint compression seals. The work under this item shall be considered subsidiary to other items of work. PART 7 BASIS OF PAYMENT 7.01 Preformed expansion joint compression seals shall be considered incidental to the project. No payment shall be made for preformed expansion joint compression seals. - 15

24 P-605 JOINT SEALING FILLER PART 6 METHOD OF MEASUREMENT 6.01 There shall be no direct measurement or payment for joint sealing filler. The work under this item shall be considered subsidiary to other items of work. PART 7 BASIS OF PAYMENT 7.01 Joint sealing filler shall be considered incidental to the project. No payment shall be made for joint sealing filler. - 16

25 P-610 STRUCTURAL PORTLAND CEMENT CONCRETE PART 4 METHOD OF MEASUREMENT 4.01 In general, and unless listed in the proposal as a separate payment item, structural concrete will not be measured for payment, but shall be incidental to those proposed items constructed of concrete Cement Treated Base (CTB) repair shall be measured per square yard including existing cement treated base milling and structural concrete installation Concrete Curb and Gutter shall be measured per linear foot. PART 5 BASIS OF PAYMENT 5.01 Structural concrete shall be considered incidental to the project. No payment shall be made for structural concrete, unless listed in the proposal as a separate payment item Payment for Cement Treated Base Repair shall be made at the contract unit price per square yard. This price shall be full compensation for furnishing all labor, material, equipment, tools, and incidentals necessary to complete the item Payment for Concrete Curb and Gutter shall be made at the contract unit price per linear foot. Concrete Curb and Gutter shall meet CDOT Specifications, Section 609, Curb and Gutter. This price shall be full compensation for furnishing all labor, material, equipment, tools, and incidentals necessary to complete the item. Payment shall be made under: P-610a Repair Cement Treated Base with 1,200psi concrete... per square yard P-610b Install Concrete Curb and Gutter... per linear foot - 17

26 P-620 RUNWAY AND TAXIWAY PAINTING AND SIGNAGE PART 4 METHOD OF MEASUREMENT 4.01 The quantity of taxiways pavement markings to be paid for shall be the number of square feet of painting performed in accordance with the specifications and accepted by the Project Manager. PART 5 BASIS OF PAYMENT 5.01 Payment for pavement marking shall be made at the contract unit price per square foot. This price shall be full compensation for furnishing all materials, for all preparation, mixing, and placing of these materials, and for all labor, equipment, tools, and incidentals necessary to complete the item. Payment shall be made under: P-620a Pavement Marking... per square foot - 18

27 D-751 MANHOLES, CATCH BASINS, INLETS AND INSPECTION HOLES PART 5 METHOD OF MEASUREMENT 5.01 Repair and reconstruction of manholes and utilities shall be measured per each, in-place, complete and accepted by the DIA Project Manager. PART 6 BASIS OF PAYMENT 6.01 Payment for repair and reconstruction of manholes and utilities shall be made at the contract unit price per each, complete and in-place. This price shall be full compensation for furnishing all materials and for all preparation, dewatering, excavation, backfilling and placing of the materials; furnishing and installation of such special connections to pipes and other structures as may be required to complete the item shown on the plans; and for all labor, equipment, tools and incidentals necessary to complete the item. Payment shall be made under: D-751a Adjustment to Gate Elevation of Existing 4-Grate Inlet... per each - 19

28 L-100 LIGHTING AND ELECTRICAL WORK PART 4 METHOD OF MEASUREMENT 4.01 There shall be no separate measurement made for items in L-100. PART 5 BASIS OF PAYMENT 5.01 All work required by Item L-100 shall be included in the prices for installation of the respective electrical items. Each pay item listed in other sections of these specifications lists the major components of work and material to be installed. In no way shall the omission of any reference to work or material implied by the drawings or specifications release the Contractor from performing or providing a complete and functional installation for the contract price as agreed upon at the time of contract award If the Contractor can identify work not included as part of other pay items, payment in L-100 shall be made under the following conditions. The work identified must not be described or shown on the plans, not listed as part of other pay items as identified in these specifications, and must be required to complete the work and provide a complete and functional installation. If this pay item is submitted upon, the contractor shall submit a list clearly identifying and describing each item claimed not to be part of the other pay items. This list shall be reviewing by the DIA Project Manager for approval. - 20

29 L-108 UNDERGROUND POWER CABLE FOR AIRPORTS PART 4 METHOD OF MEASUREMENT 4.01 Cable installed in conduit shall be measured by the number of linear feet of cable installed in conduit, including L-823 connector kits, vinyl electrical tape, rubber electrical tape, heat shrink tubing and cable tags in place, completed, ready for operation, and accepted as satisfactory Counterpoise wire and all exothermic welds shall be incidental to either each base can installed or the linear feet of conduit installed Temporary jumper cable shall be measured by the number of linear feet of cable installed in conduit, including counterpoise, ground rods and connectors, trench and backfill, conduit, saw kerfs and sealant, or other projection, installed and removed. PART 5 BASIS OF PAYMENT 5.01 Payment will be made at the contract unit price for cable installed in conduit measured from centerto-center of lights or splice cans along the conduit path including cable slack and loops as measured and accepted by the DIA Project Manager. This price shall be full compensation for furnishing all materials and for all preparation and installation of these materials, and for all labor, equipment, tools, and incidentals necessary to complete this item Payment will be made at the contract unit price for cable installed in conduit measured from one end of the closed circuit to the other along the low profile barricades at the perimeter of the closure. This price shall be full compensation for furnishing all materials and for all preparation and installation of these materials, and for all labor, equipment, tools, and incidentals necessary to complete this item. Payment will be made under: L-108a Install Cable, 1/C #8, 19 Strand, 5kV, L-824, Type B... per linear foot L-108b Install Cable, 2/C #8, 19 Strand, 5kV, L-824, Type B, Temporary Jumper... per linear foot - 21

30 L-110 AIRPORT UNDERGROUND ELECTRICAL DUCT BANKS AND CONDUITS PART 4 METHOD OF MEASUREMENT 4.01 Underground duct shall be measured by the linear feet of duct installed, including trenching, excavation, removal of excavated material, conduit chairs, conduit couplings, adhesives, concrete encasement, backfill, compaction, all measured in place, completed, and accepted as satisfactory. PART 5 BASIS OF PAYMENT 5.01 Payment will be made at the contract unit price per linear foot for each type and size of duct completed and accepted by the DIA Project Manager. This price shall be full compensation for furnishing all materials and for all preparation, assembly, and installation of these materials, and for all labor, equipment, tools, and incidentals necessary to complete this item. Payment will be made under: L-110a Install 1-way, 2-inch PVC Concrete Encased Duct... per linear foot L-110b Remove 1-way, 2-inch PVC Concrete Encased Duct per linear foot - 22

31 L-125 AIRPORT LIGHTING SYSTEMS PART 4 METHOD OF MEASUREMENT 4.01 The quantity of airfield lighting units to be paid for under this item shall be the number of each type installed, complete and in place, ready for operation, and accepted by the DIA Project Manager. It shall also include the safeguarding of existing lights and isolation transformers, the reconnection to existing conduits and counterpoise wire. When installing an existing fixture on an existing base can, incidental to the pay Item shall be spacer ring(s), concrete dam, stainless steel bolts, two piece lock washers, adhesive, and sealant. When installing a new base can, incidental to the pay Item shall be a new epoxy coated spacer ring(s), epoxy coated concrete dam, rubber grommets, rubber o-ring, end bells, stainless steel bolts, two piece lock washers, rebar, concrete, adhesive, exothermic welds, conduit, counterpoise and sealant. Each airfield lighting unit shall include the installation of identification brass marker(s) as detailed in the drawings. When installing a new 26 deep base can, incidental to the pay Item shall be a new epoxy coated spacer ring(s), epoxy coated concrete dam, rubber grommets, rubber o-ring, end bells, stainless steel bolts, two piece lock washers, rebar, concrete, trenching of existing conduit, new conduit, P- 610 dyed red, 1,200 psi P-610 structural concrete, adhesive, and sealant. Each airfield lighting unit shall include the installation of identification brass marker(s) as detailed in the drawings. When installing a new fixture, incidental to the pay Item shall be an L-830 isolation transformer Adjustment of base cans and lights shall be measured per each, in-place, complete and accepted by the DIA Project Manager Removal and reinstallation of light fixture shall include the installation of a metal cover plate, which is to remain in place during construction. Once construction is complete, the metal cover plate shall be removed and the existing fixture shall be reinstalled. New gaskets and bolts shall be installed prior to final reinstallation of existing fixture. PART 5 BASIS OF PAYMENT 5.01 Payment will be made at the contract unit price for each item completed in accordance with the plans and specifications that is installed by the Contractor and accepted by the DIA Project Manager. This price shall be full compensation for furnishing all materials and for all preparation, assembly, and installation of these materials, and for all labor, equipment, tools, and incidentals necessary to complete this item. Payment shall be made under: - 23

32 L-125a Remove and Reinstall Light Fixture... per each L-125b Install New Transformer, 65W... per each L-125c Install New L-868B Base Can, 22 Length... per each L-125d Install New L-868B Base Can, 26 Length... per each L-125e Install New L-852C, Bi-directional, NB Taxiway Centerline Light on Base Can... per each L-125f Drill Out Existing Light Can Bolt and Rethread Existing Bolt Hole... per each L-125g Install New L-852D, Bi-directional, WB Taxiway Centerline Light on Base Can, Quartz... per each L-125g Install New L-852D, Uni-directional, WB Taxiway Centerline Light on Base Can, Quartz... per each - 24

33 VOLUME 1 TECHNICAL SPECIFICATIONS DIVISION 2 AIRFIELD STANDARDS APPENDIX B RECYCLE YARD CONTRACT NO PART 1 DESCRIPTION APPENDIX B RECYCLE YARD 1.01 The costs for utilizing the DIA Recycle Yard are as follows: Incoming Recyclable Rubble: Pre-Break, Size, Clean & Stockpile Weigh & Inspect Incoming Rubble $0.47 per Ton <24" Rubble Size $2.25 per Ton >24" Rubble Size $5.89 per Ton Structural Reinforced Rubble $13.61 per Ton Reinforced Concrete Pipe $9.16 per Linear Foot Outgoing Recyclable Material: Class 6-CDOT Recycled Concrete Base $5.32 per Ton Class 6-CDOT Recycled Asphalt Base $5.22 per Ton Class 5-CDOT Recycled Concrete Base $5.32 per Ton Class 5-CDOT Recycled Asphalt Base $5.22 per Ton Class 1-CDOT Structural Fill $4.57 per Ton 2" x 3/4" Concrete Dry Screened Stone $11.77 per Ton 4" x 2" Concrete Dry Screened Stone $10.80 per Ton ASTM (#57/#67) Concrete Dry Screened Stone $15.55 per Ton DIA Stone (6" & 12") $16.47 per Ton 3/8" Fines $3.23 per Ton DIA Stone (Landscaping Runway Slabs) $21.59 per Ton Load Recycled Materials (Out-Going) $0.81 per Ton Weigh Recycled Materials (Out-Going) $0.47 per Ton END OF APPENDIX B Revision No Airfield Standard Rev 1 modified APPENDIX B-1