Irving Interchange A Major DesignBidBuild Project in Dallas

Irving Interchange A Major Design-Bid-Build Project in Dallas County PLEASE MUTE YOUR PHONES Irving Interchange April 23, 2020

Introductions Brenan Honey, P. E. Director of Construction Tx. DOT - Dallas District Irving Interchange Dereje Tesemma, P. E. Construction Project Manager Tx. DOT - Dallas District April 23, 2020 2

Project Overview Irving Interchange April 23, 2020

Construction Organizational Chart Dereje Tesemma Project Manager Recordkeeping Deputy Project Manager Consultant Tx. DOT In-House Laboratory Consultant Crew 1 Crew 2 Chief Inspector Scheduler Tx. DOT In-House Consultant Crew 3 Crew 4 *Images courtesy of www. freepik. com Irving Interchange April 23, 2020 4

ITEMS OF DISCUSSION Staging at Old Texas Stadium Coordination w/stakeholders Irving Signature Bridge A+B bidding and Milestone Joint Bid Utilities City of Irving Contract Time & –TCP Old Texas Stadium Irving Signature Bridge Project Structures on the project Irving Interchange April 23, 2020 5

Building the ultimate phase Irving Signature bridge Irving Interchange 2 Detention Ponds at SH 183 and SH 114 4 phases of construction April 23, 2020 6

Stakeholders & Utilities Involved Texas Legacy Irving Interchange April 23, 2020 7

Irving Interchange • Right of Entry agreement • Safety Training • Lightrail training • Coordination Other Businesses • Lease agreement • Regular coordination for water/sewer relocations • Meetings DART City of Irving Stakeholders & Utilities • Coordination with Fed. EX for 48” waterline • Coordination with CAT-HOLT for bridge flyover (#26) • Other coordination as needed April 23, 2020 8

Traffic & Safety Considerations Lane rental fees and liquidated damages for lane closures Time periods established in the contract for various volumes of traffic Time Period A = peak hour/highest volume of traffic Time Period B = not peak hour but heavier volumes than overnight hours Time Period C/D = lowest traffic volumes (typically overnight) 7 -day work week 24 -hour work day A+B Bidding Method Irving Interchange April 23, 2020 9

Example of Lane Rental Fee Details The contractor shall maintain a minimum of three lanes open to motorists in each direction of Loop 12 at all times, except when approved by the Engineer. Lane Closure Assessment Fees will apply whenever fewer than three lanes are available to motorists in either direction of Loop 12 Northbound or Southbound – Hourly Lane Closure Assessment Fees – Main Lanes or Express Lanes Time Period A Irving Interchange B C 1 Lane Closed $ 1, 000 $0 $0 2 Lane Closed $ 75, 000 $ 10, 000 $ 200 3 or More Lanes Closed (Full Main Lane Closure) $ 125, 000 $ 40, 000 $ 15, 000 April 23, 2020 10

Use of Traffic & Safety Considerations A+B Bidding Method * 1 2 3 4 A combination of criteria for selecting the winning bid for a construction project. A = Traditional Bid Cost B = # of Bid Days Irving Interchange Engineer’s Estimate A = $XX B = YY days RUC = $ZZ per day Engineer’s Estimate Calculation = $XX + (YY days x $ZZ per day) Bid Value = A + (B x Road User Cost) * Refer to Tx. DOT 2014 Bid awarded to the lowest bid value Irving Interchange Specifications Manual item 2. 11. 5. 1 April 23, 2020 11

Contract Time & TCP • 90 -day delay • 48 barricade months Begin Project Phase 0 • Water/sewer relocations • Toll gantry • Construct detours • Temporary pavement • Line 1 on Loop 12 • Permanent pavement, bridge, and drainage structures along SH 114, SS 482 and SH 183 Phase 1 Phase 2 • Temporary pavement • Construct permanent pavement, bridge and drainage structures along SL 12, SH 183. • Construct bridge bent structures at SH 183 and SL 12 frontage road box. • All DC’s at SH 183 and SL 12 will be open for traffic • Construct permanent pavement, bridge and drainage structures along Loop 12. • Complete EB SH 183 ML bridge widening. End Construction • Complete remaining work • Cleanup/punch list Phase 3 Contract Time Irving Interchange April 23, 2020 12

STRUCTURE FACTS Structure Type Proposed Bridges Bridge Removals Irving Interchange Number TOTAL = 32 Direct Connectors = 10 Over/Underpass Bridges = 22 Total = 7 Loop 12 = 2 SH 183 = 3 SH 114 = 2 Structure Type Quantity RC Slab 1, 200, 000 SF TX-40 GIRDER 12, 000 LF TX-46 GIRDER 3, 000 LF TX-54 GIRDER 112, 000 LF TX-62 GIRDER 7, 500 LF TX-70 GIRDER 17, 500 LF STL PLATE GIRDER 2, 800, 000 LB April 23, 2020 13

STRUCTURE FACTS Structure Type Number TOTAL = 41 Proposed Retaining Walls Irving Interchange Loop 12 – 15 SH 183 – 15 SH 114 – 7 Spur 482 – 4 Structure Type Quantity Retaining Wall (MSE) 252, 000 SF Retaining Wall (Soil. Nail) 43, 000 SF Retaining Wall (CIP) 16, 000 SF April 23, 2020 14

Construction Challenges Line 1 and Culvert 2 • Line 1 – north of Sh 183, crossing Loop 12 • Culvert 2 – crossing SH 114 • Need to be constructed early since 70% of water in project drains to these structures SH 114 Bridge 08 • DC from EB SH 114 to EB SH 183 • Steel structure • Bent 5 – 2 phase post tensioning Loop 12 Bridge 24 • DC from WB SH 183 to SB Loop 12 • Beam hanging to impact Frontage road at Loop 12 and SH 183 managed lanes • Detour in place to reduce to 1 lane of traffic Loop 12 Bridge 24 & 41 • Bridge 41 – Loop 12 NBFR underpass at SH 183 • TCP phase 2 stage 2 step 4 • Straddle bent 17 for bridge 23 & Straddle bent 5 for bridge 24 • Loop 12 proposed grade is about 10 ft below existing grade Irving Interchange April 23, 2020 15

Construction Challenges Loop 12 Bridge 29 • TCP phase 3 stage 1 step 2 • EB Loop 12 Overpass at SH 183, bridge widening • Bridge widening cannot begin until Loop 12 is lowered due to low vertical clearance Loop 12 Bridge 42 • Loop 12 SBFR at SH 183 • Vertical clearance is limited for bridge spans 7 -11 beneath the existing bridge Retaining Wall DH • NB Loop 12 at SH 183 • TCP phase 2 Stage 1 Step 5 • Challenges to construct wall around old and proposed drilled shafts • Tight construction area for abutment riprap removal Irving Interchange April 23, 2020 16

COST COMPARISON OF PROJECT ITEMS Bridge Structures 35% Other Misc Items 25% Pavement Structures 14% Retaining Walls Drainage Structures water/sewer TCP ITS Irving Interchange 8% 4% 4% % OF TOTAL COST NOTE: DBE Goal = 9% 3% 2% April 23, 2020 17

GOALS WHILE BUILDING THE PROJECT Actively engage stakeholders throughout the project Complete the project on-time and onbudget Ensure SAFETY as the #1 priority for traveling public and workers Carry out best quality project Deliver best quality product Irving Interchange April 23, 2020 18

Contacts Brenan Honey, P. E. Dereje Tesemma, P. E. Director of Construction Project Manager Assistant Director of Construction Brenan. honey@txdot. gov (214) 320 -6182 Dereje. Tesemma@txdot. gov (214) 320 -6424 William. fuller@txdot. gov (214) 320 -4449 William Fuller, P. E. Submit questions as shown in the General Notes, Sheet 88 A. Thank You! Irving Interchange April 23, 2020 19