EXHIBIT C – Project Cost Estimate - DTOP

IMPROVEMENTS TO INTERCHANGE BETWEEN PR-18 AND PR-21SAN JUAN, PUERTO RICO 1EXHIBIT C – Project Cost Estimate

IMPROVEMENTS PR-18 & PR-21 INTERCHANGEConstruction Cost Estimate5/29/2013ITEM DESCRIPTION Quantity Unit Unit Price Total AmountIEarthwork1 Clearing and Grubbing 8 Cdas 4,000 32,0002 Unclassified Excavation 86,405 CuM 12.00 1,036,8603 Removal of Unsuitable Material 2,750 CuM 22.00 60,5005 Borrow Class "A" 54,610 CuM 18.00 982,9806 Settlement Gages 18 Each 150.00 2,7007 Removal of Structures & Obstructions 1 Ls 21160.00 21,160Total Earthwork $2,136,200IISoil Erosion and Water Pollution Control8 Construction Entrance / Exit 4 Each 3,500 14,0009 Straw Bales 451 Each 15 6,76510 Silt Fence 850 LnM 10 8,500Total Soil Erosion and WaterPollution Control$29,265III Roadway11 Mobilization 1 Ls 594,760 594,76012 Sub-base Course 15,418 CuM 20 308,36013 Aggregate Base Course 3,265 CuM 36 117,54014 Lean Concrete Base (0.40m) 585 SqM 110 64,35015 Portland Cement Concrete Sidewalk 2,672 SqM 35 93,52016 Concrete Curb, Type "A" 245 LnM 45 11,02517 Concrete Curb, Type "D" 4,293 LnM 55 236,11518 Concrete Curb, Type "F" 217 LnM 60 13,02019 Sodding 675 SqM 12 8,10020 Seeding (With Mulch) 289 Units 145 41,90521 Construction Signs 83 SqM 270 22,41022 Drums 1,035 Each 100 103,50023 Temporary Pavement Marking 14,253 LnM 3 35,63324 Temporary Concrete Barrier 1,807 LnM 110 198,7701 OF 12

IMPROVEMENTS PR-18 & PR-21 INTERCHANGEConstruction Cost Estimate5/29/2013ITEM DESCRIPTION Quantity Unit Unit Price Total Amount25 Furnishing & Placing Loamy Topsoil 3,476 CuM 34 118,18426 Right of Way Marker 35 Each 100 3,50027 Ornamental Fence 145 LnM 110 15,95028 Chain Link Fence, Type "A" 1,050 LnM 90 94,50029 Temporary Chain Link Fence 950 LnM 75 71,25030 Type "A" Barrier 605 LnM 200 121,00031 Mod. Type "B" Barrier 154 LnM 375 57,75032 Type "C" Barrier 2,349 LnM 175 411,07533 Type "D" Barrier 365 LnM 50 18,25034 Jute Mesh 9,444 SqM 4 37,77635 Type "A" CPW 878 SqM 55 48,29036 Type "C" CPW 843 SqM 40 33,72037 Bed Course Material 80 CuM 40 3,20038 Energy Absorption System Type TL-3 1 Each 12,000 12,00039 Singleface Guardrail 1,036 LnM 100 103,60032 Doubleface Guardrail 85 LnM 120 10,20040 Project ID Signs 8 Each 3,000 24,00041 Field Office & Laboratory 36 Mths 5,300 190,800Total Roadway $3,224,053IV42434445VAsphalt PavementsHot Plant-Mix Bituminous Pavement mixS-1 5,293 Tons 120 635,160Hot Plant-Mix Bituminous Pavement mixB-1 13,017 Tons 120 1,562,040Hot Plant-Mix Bituminous Pavement mixL-2 1,626 Tons 120 195,120Cold Milling of Bituminous ConcretePavement 16,342 CuM 130 2,124,460Total Asphalt Pavements $4,516,780Drainage System46 Type "1" Inlet 12 Each 2,800 33,60047 Type "1A" Inlet 2 Each 3,200 6,4002 OF 12

IMPROVEMENTS PR-18 & PR-21 INTERCHANGEConstruction Cost Estimate5/29/2013ITEM DESCRIPTION Quantity Unit Unit Price Total Amount48 Type "A" Manhole 9 Each 7,500 67,50049 Type "4" Inlet 14 Each 3,100 43,40050 Type "4A" Inlet 3 Each 4,500 13,50051 Type "2" Inlet 5 Each 2,520 12,60052 Type "5A" Inlet 4 Each 4,200 16,80053 Type "5" Inlet 12 Each 3,300 39,6005418 inch Reinforced Concrete Pipe,Class III 461 LnM 130 59,9305524 inch Reinforced Concrete Pipe,Class III 1,034 LnM 165 170,6105636 inch Reinforced Concrete Pipe,Class III 160 LnM 260 41,6005742 inch Reinforced Concrete Pipe,Class IV 185 LnM 370 68,4505848 inch Reinforced Concrete Pipe,Class IV 55 LnM 500 27,50059 6" Diam. Perforated Pipe Underdrain 490 LnM 40 19,60060 Trench Excavation, Unclassified 6,161 CuM 18 110,89861 Type "B" Headwall 42" Dia. 1 Each 2,200 2,20062 Existing Inlets/Manholes to be Removed 6 Each 1,000 6,000Inlets/Manholes to be Capped at63 Subgrade 1 Each 1,200 1,20064 Convertion of Inlets/Manholes 1 Each 2,300 2,300VI656667Total Drainage System $743,688Traffic Signing & Pavement MarkingThermoplastic Pavement Marking -White 12,082 LnM 4.00 48,328Thermoplastic Pavement Marking -Yellow 3,897 LnM 4.00 15,588Thermoplastic Pavement Marking -Symbols & Letters 54 Each 90.00 4,86068 Painting Concrete Curb 538 LnM 15 8,07069 Reflective Raised Pavement Markers 690 Each 4.00 2,76070 Existing Signs to be Relocated 36 Each 500 18,00071 Existing Signs to be Removed 29 Each 250 7,25072 Traffic Sign Assembly 1 LS 34,788 34,7883 OF 12

IMPROVEMENTS PR-18 & PR-21 INTERCHANGEConstruction Cost Estimate5/29/2013ITEM DESCRIPTION Quantity Unit Unit Price Total AmountVII737475Total Traffic Signing & PavementMarkingTraffic Signal System$139,644Master/Local Traffic Signal ControllerAssembly 2 Each 12000.00 24,000Standard Traffic Signal Head Type 3-S-V Mast Arm Mounted With LED 14 Each 860.00 12,040Standard Traffic Signal Head Type 3-L-V Mast Arm Mounted With LED 3 Each 785 2,35576 Pedestrian Push Button Detector 14 Each 655 9,17077Pedestrian Signal Head Type P-18-16Countdown LED Configuration 14 Each 1,030 14,42078Video Detection System Program &Software 1 Each 6,000 6,00079 Pedestrian Signal Post 8 feet 4 Each 1,380 5,52080Traffic Signal Support - Single Mast ArmType 30', Steel Galvanized 1 Each 6,280 6,28081Traffic Signal Support - Single Mast ArmType 35', Steel Galvanized 3 Each 7,020 21,06082Traffic Signal Support - Single Mast ArmType 40', Steel Galvanized 1 Each 7,685 7,68583Traffic Signal Support - Double MastArm Type 20'/30', Steel Galvanized 1 Each 10,050 10,05084 PVC Conduit 4" Diameter 350 LnM 45 15,75085 Rigid Conduit 4" Diameter 100 LnM 60 6,00086 Concrete Pull Box 30" x 30" 11 Each 915 10,06587Electrical Conductor No. 14 RHH AWG.3c Stranded For Push Buttons 140 LnM 8 1,12088Electrical Conductor No. 14 RHH AWG.4c For Pedestrian Signal Heads Type P- 140 LnM 8 1,12089Electrical Conductor No. 14 RHH AWG.5c For Traffic Signals 450 LnM 8 3,60090Wireless Video Detection &Communication System 1 Ls 8,760 8,76091Maintenance of Existing Traffic SignalSystem 1 Ls 25,000 25,00092 Video Detection Camera 7 Each 3,000 21,00093Temporary Traffic Signal System(Phase I) 1 Ls 30,000 30,00094Temporary Traffic Signal System(Phase IA) 1 Ls 30,000 30,0004 OF 12

IMPROVEMENTS PR-18 & PR-21 INTERCHANGEConstruction Cost Estimate5/29/2013ITEM DESCRIPTION Quantity Unit Unit Price Total Amount959697Temporary Traffic Signal System(Phase II) 1 Ls 30,000 30,000Temporary Traffic Signal System(Phase IIA) 1 Ls 30,000 30,000Temporary Traffic Signal System(Phase III) 1 Ls 30,000 30,000Total Traffic Signal System $360,995VIIIPREPA Utilities983#6 AWG Alumoweld Strand for OHGround Wire800 LnM 10 8,0001001192 Point 5 kcmil 36-1 ACSR PRSpecial3,400 LnM 75 255,00010165ft Class H6 Concrete Self SupportPole3 Each 7,105 21,31510285ft Galvanized Metal Poles with BasePlate8 Each 60,000 480,000103 Concrete Bases For Tubular Steel Poles 8 Each 28,350 226,800104 PREPA Standard TM2-1 3 Each 220 660105 PREPA Standard TM16-3 3 Each 460 1,380106 PREPA Standard TM16-4 3 Each 3,000 9,000107 PREPA Standard 38-PC-6 8 Each 2,000 16,000108 PREPA Standard 38-PC-8 8 Each 1,900 15,200109 PREPA Standard 38-PC-9 1 Each 1,745 1,745110 PREPA Standard 38-PC-10 6 Each 800 4,800111 PREPA Standard 38-PC-11 1 Each 600 600112 PREPA Standard 13ABS-1 1 Each 500 500113 PREPA Standard TM-14 (3Way Goab) 1 Each 12,000 12,000114 Removal of Exiting Facilities 1 Ls 25,000 25,000Total PREPA Utilities $1,078,000IXLighting System5 OF 12

IMPROVEMENTS PR-18 & PR-21 INTERCHANGEConstruction Cost Estimate5/29/2013ITEM DESCRIPTION Quantity Unit Unit Price Total Amount115116117118119120121Type-N2 40', Aluminum Pole, Nonbreakawaywith 4'-0" Bracket and 200w,240 TypeIII Cutoff Luminaire 49 Each 3,040 148,960Type-N1 40', Aluminum Pole, Nonbreakawaywith 15'-0" Bracket and200w, 240 TypeIII Cutoff Luminaire 13 Each 4,000 52,000Type-N3 40', Aluminum Pole, Nonbreakawaywith 15'-0" Double Bracketand 200w, 240 TypeIII Cutoff Luminaire 14 Each 4,500 63,000Junction Box Per PRHA Standards DwgLS-6 (Type F, 30" x 18" x 24") 166 Each 150 24,900Conductor Cable #2 AWG CopperStranded XLP, 90° C 23,765 LnM 5 118,825Conductor Cable #6 AWG CopperStranded XLP, 90° C 10,140 LnM 3 30,4202" DB-120 PVC Conduit ConcreteEncased 3,350 LnM 35 117,250122 2" DB-120 PVC Conduit Sand Encased 8,411 LnM 18 151,398123 1-1/4" PVC Coated RGC 400 LnM 50 20,000124 New 37.5 kva Substation 4 LnM 16,000 64,000125126127Novara SAL 150w 20ft High Pole with4ft Single Arm 2 Each 15,250 30,500Novara SAL 150w 20ft High Pole with4ft Double Arm 3 Each 15,250 45,750Novara SAL 73w 20ft High Pole with 4ftSingle Arm at Roadway Side & a 150w15ft High Short Arm at Pedestrian Side 72 Each 12,250 882,000128 Novara 150w at Bridge BR-2 16 Each 12,250 196,000129X58w Leccor Light Fixture in Combinationwith Novara SAL Arm Bridge Mounted 16 Each 5,250 84,000Total Lighting System $2,029,003Telecommunication Utilities130 Telephone Manholes (4'x4.5'x7') 4 Each 3,600 14,4004" SCH-40 PVC Conduit Concrete131 Encased (Tel.) 4,504 LnM 30 135,120132 CTV Handholes (30"x48") 6 Each 565 3,3902" SCH-40 PVC Conduit Concrete133 Encased (CATV) 1,385 LnM 35 48,4756 OF 12

IMPROVEMENTS PR-18 & PR-21 INTERCHANGEConstruction Cost Estimate5/29/2013ITEM DESCRIPTION Quantity Unit Unit Price Total AmountTotal Telecommunication Utilities $201,385XIRetaining Wall RW1134 Unclassified Excavation for Structure 278 CuM 22 6,116135Class IV (Gen. Use) Concrete (f'c =4,000 psi) 140 CuM 750 105,000136Reinforcing Steel (Gr. 60, ASTM A615 &A706) 57,189 Lbs. 1.25 71,486137 W 14x176 Sections ASTM A572 Gr. 50 621 LnM 350 217,3501381/2"x4"x12.6" Structural Steel Plates(ASTM A36) 1,229 Lbs. 2.85 3,503139Drainage Geocomposite & ImpermeableMembrane 167 SqM 25 4,175140 4" Diam. Perforated Pipe Underdrain 149 LnM 35 5,215141 Precast Conrete Lagging 207 SqM 170 35,190142 Special Inlet (Top Down Contruction) 1 Each 2700 2,700143 Sheathing 12 CuM 55 660Total Retaining Wall RW1 $451,395XIIRetaining Wall RW2144 Unclassified Excavation for Structure 568 CuM 22 12,496145 Sheathing 55 CuM 55 3,025146Class IV (Gen. Use) Concrete (f'c =4,000 psi) 285 CuM 750 213,750147Reinforcing Steel (Gr. 60, ASTM A615 &A706) 116,135 Lbs. 1.25 145,169148Steel HP14x73 Piling (ASTM A572Gr.50) 157 LnM 145 22,765149 W 14x176 Sections ASTM A572 Gr. 50 665 LnM 350 232,750150 W 14x233 Sections ASTM A572 Gr. 50 376 LnM 460 172,9601511/2"x4"x14" Structural Steel Plates(ASTM A36) 5,971 Lbs. 2.85 17,017152Geocomposite Drain & ImpermeableMembrane 347 SqM 25 8,675153 4" Diam. Perforated Pipe Underdrain 376 LnM 35 13,1607 OF 12

IMPROVEMENTS PR-18 & PR-21 INTERCHANGEConstruction Cost Estimate5/29/2013ITEM DESCRIPTION Quantity Unit Unit Price Total Amount175 Sheating 123 CuM 55 6,765176 Drainage Geocomposite 28 SqM 35 980177 Permanent Erosion Control Blanket 315 SqM 25 7,875178 Coping 78 LnM 300 23,400Total Retaining Wall - RW4 $441,634XV Retaining Wall - RW5179 Mech. Stabilized Earth (MSE) Wall 581 SqM 355 206,255180 MSE Select Granular Backfill Material 6,673 CuM 40 266,920181 Proof Rolling 1,357 SqM 0.75 1,018182 Unclassified Excavation for Structures 4,048 CuM 22 89,056183 Foundation Fill 1,953 CuM 37 72,261184 Mech. Stabilized Earth Slope (RSS) 606 SqM 355 215,130185 6" dia. Perforated Pipe Underdrain 155 LnM 50 7,750186 Sheating 209 CuM 55 11,495187 Permanent Erosion Control Blanket 708 SqM 25 17,700188 Select Borrow Embankment 1,157 CuM 20 23,140189 Coping 106 LnM 300 31,800Total Retaining Wall - RW5 $942,525XVI Retaining Walls - RW6 & RW7190 Mech. Stabilized Earth (MSE) Wall 374 SqM 355 132,770191 MSE Select Granular Backfill Material 1,856 CuM 40 74,240192 Proof Rolling 520 SqM 0.75 390193 Unclassified Excavation for Structures 1,544 CuM 22 33,968194 Foundation Fill 936 CuM 37 34,632195 Class A Concrete (F'c=3.0 ksi) 90 CuM 500 45,000196 Reinforcing Steel (GR 60) 23,024 Lbs 1.25 28,780Total Retaining Walls - RW6 & RW7 $349,7809 OF 12

IMPROVEMENTS PR-18 & PR-21 INTERCHANGEConstruction Cost Estimate5/29/2013ITEM DESCRIPTION Quantity Unit Unit Price Total AmountXVIIRetaining Walls - RW8 & RW9197 Mech. Stabilized Earth (MSE) Wall 231 SqM 355 82,005198 MSE Select Granular Backfill Material 886 CuM 40 35,440199 Proof Rolling 359 SqM 0.75 269200 Unclassified Excavation for Structures 985 CuM 22 21,670201 Foundation Fill 562 CuM 37 20,794Class III (Gen Use) Concrete (F'c=3000202 psi) 40 CuM 580 23,200203 Reinforcing Steel (GR 60) 10,090 Lbs 1.25 12,613204 Coping 30 LnM 300 9,000XVIII205Total Retaining Walls - RW8 & RW9 $204,991Temporary Retaining Wall - TRW-ATemp. Mech. Stabilized Earth (MSE)Wire Wall 429 SqM 355 152,295206 MSE Select Granular Backfill Material 3,202 CuM 40 128,080207 Proof Rolling 587 SqM 0.75 440208 Unclassified Excavation for Structures 1,736 CuM 22 38,192209 Foundation Fill 902 CuM 37 33,374210 6" dia. Perforated Pipe Underdrain 116 LnM 50 5,800211 Sheating 133 CuM 55 7,315Total Temporary Retaining Wall - TRW-A $365,496XIX212213214Bridge BR-1Class V (Bridge Deck) Concrete(F'c=5,000 psi) 336 CuM 750 252,000Class V (Gen Use) Concrete (F'c=5,000psi) 405 CuM 600 243,000Class V (Gen Use) Mass Concrete(F'c=5,000 psi) 89 CuM 600 53,400215 Reinforcing Steel (GR 60) 325,200 Lbs 1.25 406,500216 HP 14x89 (GR 50) Piling 672 LnM 350 235,200217 HP 14x89 (GR 50) Test Piling 48 LnM 525 25,200218 Pile Load Test (Static) 4 Each 12,000 48,00010 OF 12

IMPROVEMENTS PR-18 & PR-21 INTERCHANGEConstruction Cost Estimate5/29/2013ITEM DESCRIPTION Quantity Unit Unit Price Total Amount219 Unclassified Excavation for Structures 539 CuM 22 11,858220 Name Plate 1 Each 1,500 1,500221 Bridge Approach Embankment Material 270 CuM 40 10,800222 Drainage Geocomposite 135 SqM 35 4,725223 6" dia. Perforated Pipe Underdrain 30 LnM 50 1,500Total Bridge BR-1 $1,293,683XXBridge BR-2224 Unclassified Excavation for Structures 1,768 CuM 22 38,896225 Bridge Approach Embankment Material 8,821 CuM 40 352,840226Class V (Bridge Deck) Concrete(F'c=5,000 psi) 362 CuM 750 271,500227Class V (Gen Use) Concrete (F'c=5,000psi) 272 CuM 600 163,200228Class V (Gen Use) Mass Concrete(F'c=5,000 psi) 1,617 CuM 600 970,200229 Reinforcing Steel (GR 60) 589,219 Lbs 1.25 736,524230 HP 14x89 (GR 50) Piling 2,826 LnM 350 989,100231 HP 14x89 (GR 50) Test Piling 60 LnM 525 31,500232 Pile Load Test (Static) 4 Each 12,000 48,00033.03m AASHTO BIV-48 P/S Box Beam233 Girders 23 Each 19,800 455,400234 Precast Fascia Panels (Planters) 107 LnM 170 18,190235 Safety Fence (Jackob Webnet) 84 LnM 2,000 168,000236 Pedestrian Railing 104 LnM 115 11,960237 Traffic Railing 87 LnM 150 13,050238 Precast Panels (MSE) 19 SqM 355 6,745239 Name Plate 1 Each 1,500 1,500240 Drainage Geocomposite 621 SqM 35 21,73511 OF 12

IMPROVEMENTS PR-18 & PR-21 INTERCHANGEConstruction Cost Estimate5/29/2013ITEM DESCRIPTION Quantity Unit Unit Price Total Amount241 6" dia. Perforated Pipe Underdrain 88 LnM 50 4,400242 Sheating 5 LnM 55 275243 Special Manhole 1 LnM 2,700 2,700Total Bridge BR-2 $4,305,715Sub - TotalPermits, Taxes, Contingency (15%)$24,385,205$3,657,781GRAND - TOTAL $28,042,98512 OF 12