Resolution No. 2026-047 A Resolution Approving the Iowa Statewide Transportation Alternatives Set-Aside Program (TA Set-Aside) Application — H-1

ENGINEER'S OPINION OF PROBABLE COSTS 10' Pedestrian Trail Options & Pedestrian Underpass, US 6 Tall Grass Avenue to Roberts Ferry Road Tiffin, IA DATE: 9/16/2026 Estimate Year 2026 MSA PROJECT #: 13603026 Construction Year 2028 Underpass Work West Connection North Connection East Connection Project Total Excavation, wing walls, 1500' of proposed Trail 1000' of proposed Trail 700' of proposed Trail from lighting, proposed Trail from Culvert, west, to from Culvert, east, to Culvert, north, to Redbird Run connections Deerview Avenue Roberts Ferry Road ITEM DESCRIPTION UNIT UNIT PRICE QUANTITY COST QUANTITY COST QUANTITY COST QUANTITY COST QUANTITY TOTAL PRICE NO. 1 Clearing & Grubbing LS $ 10,000.00 - $ - 0.40 $ 4,000 0.30 $ 3,000 0.30 $ 3,000 1 $ 10,000 2 Fill, Contractor Furnished CY $ 22.00 - $ - 1,182 $ 26,100 - $ - - $ - 1,182 $ 26,100 3 Excavation CY $ 10.00 2,900 $ 29,000 717 $ 7,200 246 $ 2,500 1,025 $ 10,300 4,888 $ 49,000 4 PCC Overlay inside underpass (ADA Compliance) SY $ 63.00 210 $ 13,300 - $ - - $ - - $ - 210 $ 13,300 5 PCC Endwalls with Pipe Railing at top EA $ 52,000.00 2 $ 104,000 - $ - - $ - - $ - 2 $ 104,000 6 Storm Sewer for Pedestrian Underpass (based on Oct. 2008 design) LS $ 32,500.00 1 $ 32,500 - $ - - $ - - $ - 1 $ 32,500 7 Drainage (Minor Storm Piping) LF $ 150.00 30 $ 4,500 200 $ 30,000 45 $ 6,800 60 $ 9,000 335 $ 50,300 8 Guardrail LF $ 30.00 200 $ 6,000 - $ - - $ - - $ - 200 $ 6,000 9 Anti-Graffiti Coating LS $ 12,500.00 1 $ 12,500 - $ - - $ - - $ - 1 $ 12,500 10 Underpass Lighting System LS $ 37,000.00 1 $ 37,000 - $ - $ - - $ - 1 $ 37,000 11 Pedestrian Hand Rail LF $ 210.00 475 $ 99,800 - $ - - $ - - $ - 475 $ 99,800 12 Modular Block Retaining Wall (Assume a ~3'-4' wall height average) SF $ 70.00 - $ - 6,000 $ 420,000 - $ - 5,000 $ 350,000 11,000 $ 770,000 13 Poured Concrete Retaining Wall (Assume an 8' 6" max height) CY $ 1,250.00 49 $ 61,250 - $ - - $ - - 49 $ 61,250 14 PCC Trail, 10' Wide, 6" Thickness SY $ 60.00 361 $ 21,660 1,667 $ 100,000 778 $ 46,700 1,111 $ 66,700 3,917 $ 235,060 15 PCC Trail Aggregate Base & Subbgrade Prep, 4" Thickness SY $ 10.00 167 $ 1,670 2,000 $ 20,000 933 $ 9,400 1,333 $ 13,400 4,434 $ 44,470 16 Construction Survey (1%) LS 1% $ 5,000 $ 7,000 $ 1,000 $ 5,000 1 $ 18,000 17 Traffic Control (3%) LS 2% $ 9,000 $ 13,000 $ 2,000 $ 10,000 1 $ 34,000 18 Mobilization (8%) LS 8% $ 35,000 $ 51,000 $ 6,000 $ 38,000 1 $ 130,000 ESTIMATED CONSTRUCTION SUBTOTAL $ 472,180 $ 678,300 $ 77,400 $ 505,400 $ 1,733,280 Contingency 20% $ 94,500 $ 135,700 $ 15,500 $ 101,100 $ 346,800 Inflation 5% per year $ 58,100 $ 83,500 $ 9,600 $ 62,200 $ 213,400 ESTIMATED CONSTRUCTION COST (2028) $ 624,780 $ 897,500 $ 102,500 $ 668,700 $ 2,293,480 Estimated Grant/Loan Administration $ - $ - $ - $ - $ - Estimated Legal Fees $ - $ - $ - $ - $ - Estimated Property Acquisition $ - $ - $ - $ - $ - Estimated Design Engineering 10% $ 62,500 $ 89,800 $ 10,300 $ 66,900 $ 229,500 Estimated Construction Engineering 10% $ 62,500 $ 89,800 $ 10,300 $ 66,900 $ 229,500 TOTAL ESTIMATED PROJECT COST: $ 750,000 $ 1,078,000 $ 124,000 $ 803,000 $ 2,753,000 Disclaimers & Assumptions 1 This opinion of probable cost is approximate. Actual construction bids may vary significantly from this opinion due to timing of bids, constructual schedule restraints, labor rate increases, material increases, or other factors beyond the control of the engineer. 2 Unit prices are based on bids received from similar projects and bid prices from within the past two years from statewide Iowa DOT lettings. 3 Easements are estimations only. Compensation will be adjusted as needed during negotiations. 4 No street lighting or private utility relocation costs included. 5 Existing Culvert is 12' Wide, 8' Tall, 75' long 6 Proposed End Section and Headawall will be 41' long on each side 7 Total length is 157' 8 Rough length of wingwall is 30.5' plus a minimum 4' end section. For space reasons, it is assumed that the wingwall may tie into the poured ramp retaining wall at an approx. height of 5'. This location is west of the underpass and south of the first ramp. G:\13\13603\13603028\_Pedestrian Underpass Hwy 6\TA Set-Aside Grant Application\backup\Attachment E - Itemized Breakdown of Cost Completed By: