ADDENDUM NUMBER FOUR

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Department of Aviation Airport Office Building 8500 Peňa Boulevard Denver, Colorado (303) 342-2200 www.flydenver.com March 28, 2017 2017 Annual Airfield Pavement Rehabilitation CONTRACT NO.

1 Department of Aviation Airport Office Building 8500 Peňa Boulevard Denver, Colorado (303) March 28, Annual Airfield Pavement Rehabilitation CONTRACT NO ADDENDUM NUMBER FOUR This Addendum Number Four supersedes /or supplements all portions of the Contract Documents with which it conflicts. Bidders must acknowledge receipt of this addendum on page 28 of the Revised Bid Forms. Terry Seifert Digitally signed by Terry Seifert DN: cn=terry Seifert, o, ou=den, m, c=us Date: :47:48-06'00' Terry Seifert Project Manager

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 2017 ANNUAL AIRFIELD PAVEMENT REHABILITATION CONTRACT NO ADDENDUM NUMBER FOUR PART ONE: VOL.1-CONTRACT DOCUMENTS Scope of this Addendum BID SCHEDULE: Change quantity item P-610a from CY to SF in schedule 2&3.. The total number of pages (including cover sheet) contained in this Addendum Number four is ten (10). * * * * * * * End of Addendum Number One.

3 ADDENDUM 04 BID TABS 2017 PAVEMENT REHABILITATION BID FORM SCHEDULE 1 - FEDERAL Item No. Description Price Unit Quantity Unit Price Extension a Mobilization LS 1 ($ )per lump sum a Flaggers ($ )per hour HR 2, b Gate Guard HR 600 ($ )per hour c Gate Guard Shack (Temporary) LS 1 ($ )per lump sum d Traffic Control LS 1 ($ )per lump sum a Cover Sign Panels EA b Cover Elevated Edge Lights EA 30

4 Survey LS 1 ($ )per lump sum P-150a Remove 17-inch Non-Reinforced concrete Pavement P-150c Remove Bituminous Shoulder Pavement Full SY 9030 SY 990 P-150d Demolish L-868B Base Can, 24" Length EA 22 P-150e Demolish L-868B Base Can, 26" Length EA 2 P-150g Grind Existing CTB SY 1,200

5 P-401a Bituminous Base Course (3 INCH) ($ )per ton TN 192 P-401b Bituminous Base Course (7 INCH) ($ )per ton P-403a Asphalt Treated Permeable Base ($ )per ton TN TN P-161a Bondbreaker Fabric SY 9030 P-501a 17-inch Portl Cement Concrete Pavement, Non Reinforced SY 9030 Dollars P-501c SpallRepair ($ )per square foot SF 100 P-501f Concrete Crack Repair ($ )per linear feet LF 100 P-610a Cement Treated Base Repair, with 1,200 psi concrete SF 120 ($ )per square foot

6 D-620a L-108a L-125a Install Pavement Marking ($ )per square foot Install Cable, 1/C #8, 19 str, 5kV, L-824, Type B or C Wire ($ )per linear foot Install L-868B Base Can, 24" Length Ins ($ )per each SF 4000 LF 2300 EA 22 L-125b Install L-868B Base Can, 26" Length Ins ($ )per each EA 2 L-125c Install New Transformer EA 24 L-125d Drill Out Existing Light Can Bolt Rethread Existing Bolt Hole EA 30

7 2017 PAVEMENT REHABILITATION BID FORM SCHEDULE 2 - FEDERAL Item No. Description Price Unit Quantity Unit Price Extension a Flagger HR 380 ($ )per hour b Gate Guard HR 400 ($ )per hour c Guard Shack LS 1 ($ )lump sum d Traffic Control ($ )lump sum LS 1 P-150a Removal 17 inch Non-Reinforced Concrete SY 3352 P-150b Removal 17 inch Reinforced Concrete SY 280 P-150g Grind Existing CTB ($ )per square foot SF 200

8 P-161a Bondbreaker Fabric SY 3632 P-501a 1 7 i n c h Portl Cement Concrete Pavement, Non Reinforced SY 3352 Dollars P-501b 1 7 i n c h Portl Cement Concrete Pavement, Reinforced SY 280 P-501c SpallRepair SF 280 P-501e Full Depth Concrete Repair ($ )per linear foot SY 5 P-501f Concrete Crack Repair ($ )per linear feet LF 150 P-610a Cement Treated Base Repair, with 1,200 psi concrete SF 90 D-620a ($ )per cubic yard Install Pavement Marking ($ )square feet SF 700

9 D-751a Storm Drain re-elevation (2 grate inlets) ($ )oer each 2017 PAVEMENT REHABILITATION BID FORM SCHEDULE 3 - FEDERAL EA 2 Item No. Description Price Unit Quantity Unit Price Extension a Flagger HR 120 ($ )per hour b Gate Guard HR 200 ($ )per hour c Guard Shack LS 1 ($ )lump sum a Cover Sign Panels EA b Cover Elevated Edge Lights EA d Install tie backs EA 2 P-150b Removal 17 inch Reinforced Concrete SY 6

10 P-150d Demolish L-868B Base Can, 20" Length EA 6 P-150e Demolish L-868B Base Can, 24" Length EA 3 P-150g Grind Existing CTB ($ )per square feet SF 20 P-161a Bondbreaker Fabric SY 374 P-501a 17-inch Portl Cement Concrete Pavement, Non Reinforced SY 374 Dollars P-501b 17- i n c h Portl Cement Concrete Pavement, Reinforced SY 6 P-501c SpallRepair ($ )per square feet SF 6 P-501f Concrete Crack Repair ($ )per linear feet LF 50

11 P-610a Cement Treated Base Repair, with 1,200 psi concrete SF 30 D-620a ($ )per cubic yard Install Pavement Marking ($ )pre square foot SF 452 L-108a L-125a Install Cable, 1/C #8, 19 str, 5kV, L-824, Type B or C Wire ($ )per linear foot Install L-868B Base Can, 24" Length Ins ($ )per each LF 350 EA 6 L-125b Install L-868B Base Can, 26" Length Ins ($ )per each EA 3 L-125c Install New Transformer EA 11 L-125d Drill Out Existing Light Can Bolt Rethread Existing Bolt Hole EA 10 L-125e Remove light fixture, install blank, re-install light fixture after paving EA 4

12 2017 PAVEMENT REHABILITATION BID FORM SCHEDULE 4 FEDERAL a a Mobilization ($ )per lump sum Ins Flagger ($ )per hour LS 1 HR 200 P-152 Unclassified Excavation, Export off site Ins ($ )per cubic yard CY 2020 T-901a Seeding ($ )per acre AC 1.50 T-908a Hydrologic -Mulching ($ )per acre AC 1.50 T-905 Topsoilling SY 5066

2019 Annual Airfield Pavement Rehabilitation CONTRACT NO ADDENDUM NUMBER ONE

February 13, 2019 2019 Annual Airfield Pavement Rehabilitation CONTRACT NO. 201947110 ADDENDUM NUMBER ONE This Addendum Number One supersedes and/or supplements all portions of the Contract Documents with