MAJOR REHABILITATION REPORT: BASELINE COST ESTIMATE FOR RECOMMENDED PLAN

Transcription

1 MAJOR REHABILITATION REPORT: BASELINE COST ESTIMATE FOR RECOMMENDED PLAN BOLIVAR DAM SANDY CREEK OF THE TUSCARAWAS RIVER, OHIO PREPARED BY: COST ENGINEERING SECTION, USACE, HUNTINGTON DISTRICT AUGUST 2008

2 MAJOR REHABILITATION REPORT: BASELINE COST ESTIMATE FOR RECOMMENDED PLAN BOLIVAR DAM SANDY CREEK OF THE TUSCARAWAS RIVER, OHIO AUGUST 2008

3 Bolivar Dam Major Rehabilitation Report August 2008 TABLE OF CONTENTS 1 INTRODUCTION PROJECT DESCRIPTION METHODOLOGY Cost Methodology General Direct Costs Labor-Wage Determination Equipment Rates Overtime Vendor Quotes Sales Tax Crews Quantities Indirect Costs Construction Contractor Field Strategy Prime Contractor Subcontractors Escalation Contingency PROJECT FEATURE ACCOUNTS (01) Lands and Damages (04) Dams (18) Cultural Resources (19) Buildings, Grounds, and Utilities (22) Feasibility Studies (30) Planning, Engineering, And Design (31) Supervision And Administration COST ESTIMATE REPORTS MII Cost Estimate Reports Direct Cost Cost to Prime Project Cost TAB A MII Report Appendix D: Baseline Cost Estimate for Recommended Plan i

4 Bolivar Dam Major Rehabilitation Report August 2008 LIST OF TABLES Table 1. Contractor Markups... 3 Table 2. OMB Factors... 5 Table 3. Base Year Contingencies... 6 Table 4. Non-Fully Funded & Fully Funded Project Costs... 9 Appendix D: Baseline Cost Estimate for Recommended Plan ii

5 Bolivar Dam Major Rehabilitation Report August INTRODUCTION The Bolivar Dam Major Rehabilitation project is proposed to be implemented by the Huntington District. This report describes in detail fully-funded project costs and schedule execution for all appropriate feature accounts. 2 PROJECT DESCRIPTION Bolivar Dam is located on Sandy Creek of the Tuscarawas River, miles above the mouth of the Muskingum River, located in Stark and Tuscarawas Counties of Ohio. The Dam has an impervious core with a cut-off trench and is flanked by pervious zones. The embankment has a maximum height of 87 feet, a crest length of 6300 feet, and a crest width of 25 feet. Constructed primarily for flood control, the maximum flood control pool level of elevation feet would encompass 6500 surface acres. 3 METHODOLOGY 3.1 COST METHODOLOGY General The feasibility cost estimate has been prepared to an equivalent FY08 price level. The preparation of this cost estimate is in accordance with guidelines and policies included in ER Cost Engineering Policy and General Requirements, (26 March 1993) and ER Civil Works Cost Engineering, (31 March 1994). The estimate was completed using the latest guidance from OCE concerning implementation of the Civil Works Breakdown Structure (CWBS) and Chart of Accounts. The estimate was prepared using the MCACES 2nd Generation MII Version 2.3 cost estimating software developed by Project Time and Cost, Atlanta, Georgia. The MII estimating software was used to develop the estimate by developing a construction sequence for each item of work and applying detailed line items and crews to perform the work. Crews were developed that correspond to the work being performed. Material prices were obtained through telephone solicitations with vendors, Internet suppliers, MII Cost Book, recent similar projects, and R.S. Means Cost data references Direct Costs Direct costs are based on anticipated equipment, labor, and materials necessary to construct the project as scoped. Local material quotes were obtained for most of the material items. Direct costs were calculated independent of the contractor assigned to perform the tasks. Following formulation of the direct cost, a determination was made as to whether the work would be performed by the prime contractor or a subcontractor. Appendix D: Baseline Cost Estimate for Recommended Plan Page 1

6 Bolivar Dam Major Rehabilitation Report August Labor-Wage Determination Current Tuscarawas County, Ohio, Davis-Bacon wage rates (General Decision Number: OH /04/2008 OH2) as provided by the Department of Labor, were used for all craft labor. The total labor rate was developed using the base wage, fringe benefits, FICA, FUTA, and Workman s Compensation rates for each craft. The base wage rate and fringe were entered into MII and applied accordingly. Additional labor burdens are computed by MII based on the state, which in this case is Ohio Equipment Rates The 2007 Equipment database, based on EP , Construction Equipment Ownership and Operation Expense Schedule, Region II, was used and adjusted for current fuel costs Overtime The estimator assumed that the contractor would work various overtime shifts dependent on the season and type of work being performed Vendor Quotes Vendor quotes have been acquired and documented for the material prices associated with significant features of work Sales Tax Ohio sales tax was included at a rate of 7% on material Crews Project specific crews have been developed for use in estimating the direct costs of construction for those items not estimated using quotes or historical cost information. Crew members consist of selected complements of labor classifications and equipment pieces assembled to perform specific tasks. Productivity has been assigned to each crew reflective of the expected output per unit of measure for the specific activities listed in the cost estimate Quantities The quantity takeoffs were developed and provided by the Project Development Team (PDT) members. Other associated sub-quantities were developed by the estimator. Appendix D: Baseline Cost Estimate for Recommended Plan Page 2

7 Bolivar Dam Major Rehabilitation Report August Indirect Costs Construction Contractor Field Strategy The contractor field strategy assumed that one prime contractor would perform most of the work associated with the concrete cutoff wall, impervious blanket, and downstream seepage blanket. Estimator assumed that this prime contractor would subcontract out various earthwork items, clearing and grubbing, seeding, paving, mechanical/electrical work, radial grouting, and work associated with the relief wells and instrumentation. A separate prime contractor was assumed to construct the RE office and subcontract out the fencing and paving construction. Table 1. Contractor Markups Contractor Prime Contractor Clearing/seeding subcontractor Paving subcontractor Mechanical/electrical subcontractor Radial grouting subcontractor Relief well/instrumentation subcontractor Drilling subcontractor Building Contractor Fencing subcontractor Paving subcontractor Items of Work Concrete cutoff wall, impervious blanket, downstream seepage blanket All work associated with seeding and clearing/grubbing Demolition/construction of paved roadway Gate work and hoisting equipment Radial grouting Relief wells and instrumentation Radial grouting Construction of RE office Installation of fence/swing gate Pavement of parking lot Prime Contractor Field Office Overhead (FOOH) The indirect costs for Field Office Overhead (FOOH) are included as a percentage of the direct costs. For this project, 15% has been used for FOOH on both the prime and subcontracted work. This value represents the anticipated prime contractor field overhead costs for such items as project supervision, contractor quality control, contractor field office supplies, personal protective equipment, field engineering, and other incidental field overhead costs. Appendix D: Baseline Cost Estimate for Recommended Plan Page 3

8 Bolivar Dam Major Rehabilitation Report August Home Office Overhead (HOOH) For Home Office Overhead (HOOH) expense, the cost estimate includes an allowance applied as percentage of direct cost plus field overhead. HOOH includes items such as office rental/ownership costs, utilities, office equipment ownership/maintenance, office staff (managers, accountants, clerical, etc.), insurance, and miscellaneous. In reality, the range of home office overhead can be quite broad and depends largely on the contractor s annual volume of work and the type of work that is generally performed by the contractor. In this case, a value of 6% has been used for HOOH on both the prime and subcontracted work Profit Profit has been calculated using the profit weighted guidelines as described in ER (31 March 1994) Bond Bond was included as a running percentage of 1% (own work and subcontracted work) B&O Tax B&O tax was not included Subcontractors Field Office Overhead (FOOH) All subcontractor overhead costs are set to 15% (own work and subcontracted work) of direct cost to account for such items as project supervision, contractor quality control, contractor field office supplies, personal protective equipment, field engineering, and other incidental field overhead costs. The exception is where the subcontractor has provided a quoted price including overhead. In that case, no additional markups have been included for subcontractor s overhead. Appendix D: Baseline Cost Estimate for Recommended Plan Page 4

9 Bolivar Dam Major Rehabilitation Report August Home Office Overhead (HOOH) The cost estimate includes an allowance applied as percentage of direct cost plus field overhead for HOOH. HOOH includes such items as office rental/ownership costs, utilities, office equipment ownership/maintenance, office staff (managers, accountants, clerical, etc.), insurance, and miscellaneous. In reality, the range of HOOH can be quite broad and depends largely on the contractor s annual volume of work and the type of work that is generally performed by the contractor. In this case, a value of 6% was assumed for the subcontractor (own work and subcontracted work) Profit Profit has been included as a percentage. In this case, a value of 10% was assumed for the subcontractor (own work and subcontracted work) Bond Bond was included as a running percentage of 1% (own work and subcontracted work) B&O Tax B&O tax was not included Escalation Escalation has not been included in the MII cost estimate. It is included in the Fully Funded Cost Estimate in Appendix G. The fully funded table distributes the base level cost estimate across the appropriate years according to the schedule. The yearly totals are inflated by OMB cost factors as shown in Table 2, which vary by feature account. These inflated yearly totals are summed to yield a total fully funded project cost. Table 2. OMB Factors OMB PRIOR FY 08 FY 09 FY 10 FY 11 FY 12 FY 13 FY 14 FY 15 Class I Class II Appendix D: Baseline Cost Estimate for Recommended Plan Page 5

10 Bolivar Dam Major Rehabilitation Report August Contingency A Cost and Schedule Risk Analysis (CSRA) was performed on this project to identify the 80% confidence level project cost and contingencies. A summary of these contingencies be feature account can be found in Table 3 below. Additional information concerning the risk analysis can be found in Appendix G. The CSRA identified the following factors as major impacts for both the cost and schedule: Funding The current fully-funded cost requires approximately $39M for FY12, $53M for FY13, and $59M for FY 14. If funding is capped and the project schedule is pushed out, costs will increase due to the longer construction schedule, escalation, and additional E&D & S&A. Contract Acquisition Currently only a handful of contractors are capable of performing this type of construction in the United States. If the project is not competitively bid, or if there are not many bidders, project costs will increase due to a non-competitive market. Scope Growth The current cost estimate is based on the current known conditions and quantities. Further engineering analysis may result in additional scope and increase costs. Table 3. Base Year Contingencies Feature Account % Contingency 01 Lands & Damages 12.8% 04 Dams 32.4% 18 Cultural Resource Preservation 161.1% 19 Buildings, Grounds, & Utilities 24.1% 22 Feasibility Studies 0.0% 30 Planning, Engineering, & Design 41.6% 31 Supervision & Administration 36.4% Total Project Contingency 33.0% Appendix D: Baseline Cost Estimate for Recommended Plan Page 6

11 Bolivar Dam Major Rehabilitation Report August PROJECT FEATURE ACCOUNTS 4.1 (01) LANDS AND DAMAGES The land and damages feature account includes costs for both permanent and temporary acquisitions. The Government owns all the land and no acquisitions are anticipated for this project. Only administrative costs have been included in this account for investigations. 4.2 (04) DAMS This cost account includes the construction of the Bolivar DSA measures, which includes the following: Impervious blanket, Partial cutoff wall along the upstream toe, Abutment cutoff wall, Downstream seepage blanket, Rehabilitation of relief wells, Instrumentation, and Mechanical/electrical upgrades. 4.3 (18) CULTURAL RESOURCES This cost account includes costs for archaeological investigations. 4.4 (19) BUILDINGS, GROUNDS, AND UTILITIES This cost account includes the construction of the resident engineer s building that would be required as part of the implementation of this project. 4.5 (22) FEASIBILITY STUDIES This cost account includes all costs expended for the purpose of preparing the feasibility report. 4.6 (30) PLANNING, ENGINEERING, AND DESIGN The work covered under this account includes project management, project planning, preliminary design, final design, geotechnical and HTRW investigations, hydraulic modeling, preparation of plans, preparation of specifications, engineering during construction, contract advertisement, opening of bids, and contract award. The cost for this account was estimated by the PDT and is included for each major project feature. Appendix D: Baseline Cost Estimate for Recommended Plan Page 7

12 Bolivar Dam Major Rehabilitation Report August (31) SUPERVISION AND ADMINISTRATION The work covered under this account includes contract supervision, contract administration, construction administration, technical management activities, and District office supervision and administration costs. The cost for this account has been estimated based on a historical factor of 7.5% of the total construction cost accounts. Appendix D: Baseline Cost Estimate for Recommended Plan Page 8

13 Bolivar Dam Major Rehabilitation Report August COST ESTIMATE REPORTS 5.1 MII COST ESTIMATE REPORTS Total project cost prior to fully-funding is $138,437,000 at FY08 price level. The total fully-funded project cost is $165,006,000. Table 4 below summarizes these costs broken out by feature account. Table 4. Non-Fully Funded & Fully Funded Project Costs Direct Cost Direct costs are defined as bare costs that are marked up for productivity adjustments, overtime, taxes, and/or other miscellaneous adjustments Cost to Prime Cost to prime is defined as direct costs with markups applied for PTI and any allowances such as small tools for the subcontractor work. The subcontractor markup for job office overhead (JOOH), home office overhead (HOOH), profit, bond, and excise tax and/or any miscellaneous adjustment is also included. This is in effect the cost to the performing contractor. Appendix D: Baseline Cost Estimate for Recommended Plan Page 9

14 Bolivar Dam Major Rehabilitation Report August Project Cost The project cost takes the cost to owner and then adds any escalation, contingencies, SIOH (supervision, inspection, and overhead), and/or any miscellaneous owner costs. It should be noted that escalation factors are applied in the fully funded spreadsheet calculations and not using escalation functions in the MII cost estimating software. Appendix D: Baseline Cost Estimate for Recommended Plan Page 10

15 Bolivar Dam Major Rehabilitation Report August 2008 TAB A MII REPORT Appendix D: Baseline Cost Estimate for Recommended Plan Page 11

16 MII Independent Government Estimate Title Page Estimated by CELRH-EC-TC Designed by U.S. Army Corps of Engineers Prepared by Dustin Sawyers Preparation Date 8/29/2008 Effective Date of Pricing 10/1/2007 Estimated Construction Time Days This report is not copyrighted, but the information contained herein is For Official Use Only.

17 MII Independent Government Estimate Table of Contents Library Properties... i Project Notes... ii Markup Properties...iii Direct Costs...1 Construction Costs...1 Associated Costs...17 Indirect Costs...19 Construction Costs...19 Associated Costs...19 Owner Costs...20 Construction Costs...20 Associated Costs...20 Crew Summary...21 Labor Rates...28 Equipment Rates...29

18 MII Independent Government Estimate Library Properties Page i Library Properties Designed by Design Document U.S. Army Corps of Engineers Document Date 8/29/2008 Estimated by District Huntington District CELRH-EC-TC Contact Dustin L. (304) Prepared by Budget Year 2008 Dustin Sawyers UOM System Original Direct Costs Timeline/Currency LaborCost Preparation Date 8/29/2008 EQCost Escalation Date 8/29/2008 MatlCost Eff. Pricing Date 10/1/2007 SubBidCost Estimated Duration 0 Day(s) Allowance Currency US dollars Exchange Rate Costbook CB04aEB: MII English Cost Book 2004b Final Labor Rates LaborCost1 LaborCost2 LaborCost3 LaborCost4 Labor LB04NatFD: Bolivar Dam Labor Rates Note: Davis-Bacon General Decision Number: OH /01/2006 OH2 Equipment EP07R02: MII Equipment Region 2r 2007 Note: Fuel prices updated on August 17, 2008 from for the state of Ohio. Electricity rates updated from 02 MIDEAST Fuel Shipping Rates Sales Tax 7.00 Electricity Over 0 CWT 7.31 Working Hours per Year 1,450 Gas Over 240 CWT 7.32 Labor Adjustment Factor 1.07 Diesel Off-Road Over 300 CWT 6.32 Cost of Money 5.25 Diesel On-Road Over 400 CWT 5.97 Cost of Money Discount Over 500 CWT 3.56 Tire Recap Cost Factor 1.50 Over 700 CWT 3.56 Tire Recap Wear Factor 1.80 Over 800 CWT 4.88 Tire Repair Factor 0.15 Equipment Cost Factor 1.00 Standby Depreciation Factor 0.50

19 Project Notes Print Date Wed 27 August 2008 U.S. Army Corps of Engineers Time 16:10:47 MII Independent Government Estimate Project Notes Page ii Date Author Note

20 MII Independent Government Estimate Markup Properties Page iii Markup Properties Direct Cost Markups Category Method Productivity Productivity Productivity Overtime 6-12s Overtime Overtime Days/Week Hours/Shift Shifts/Day 1st Shift 2nd Shift 3rd Shift Standard Actual Day OT Factor Working OT Percent FCCM Percent Monday 1.50 Yes (44.44) Tuesday 1.50 Yes Wednesday 1.50 Yes Thursday 1.50 Yes Friday 1.50 Yes Saturday 1.50 Yes Sunday 2.00 No Overtime 2-shifts Overtime Overtime Days/Week Hours/Shift Shifts/Day 1st Shift 2nd Shift 3rd Shift Standard Actual Day OT Factor Working OT Percent FCCM Percent Monday 1.50 Yes (69.70) Tuesday 1.50 Yes Wednesday 1.50 Yes Thursday 1.50 Yes Friday 1.50 Yes Saturday 1.50 Yes Sunday 2.00 No Supervision/Foreman TaxAdj Running % on Selected Costs LaborCost Show up time MiscDirect Running % on Selected Costs LaborCost Small Tools TaxAdj Running % on Selected Costs LaborCost Sales Tax TaxAdj Running % on Selected Costs MatlCost Contractor Markups Category Method JOOH JOOH Running % HOOH HOOH Running % Prime's Profit Profit Profit Weighted Guidelines Guideline Value Weight Percentage Risk Difficulty Size Period Invest (Contractor's) Assist (Assistance by) SubContracting Total Sub's Profit Allowance Running % B&O Tax Allowance Running % Bond Bond Running % Weather Delays Allowance Running % Contract Mods/Claims Allowance Running %

21 MII Independent Government Estimate Markup Properties Page iv Owner Markups Category Method Contingency Contingency Running %

22 MII Independent Government Estimate Direct Costs Page 1 Description Quantity UOM CrewTag Duration DirectLabor DirectEQ DirectMatl DirectSubBid DirectCost Direct Costs 58, ,549,619 18,340,613 16,890,068 9,696,743 76,407,145 58, ,549, ,340, ,890, ,696, ,137, Construction Costs 1.00 EA 58, ,549,619 18,340,613 16,890,068 9,696,743 58,137,043 58, ,542, ,338, ,871, ,444, ,756, Dams , ,542,182 18,338,078 16,871,210 9,444,743 57,756, , , Mobilization/Demobilization , ,000 USR Mob/demob 1.00 LS , ,000 (Note: Allow $800k based upon recent budgetary quote received from Inquip Associates for mob/demob at Mohawk Dam for same type of work.) Impervious Blanket 128, CY 1, , ,351 3,207, ,349, Impervious Material Fill 128, ECY 1, , ,926 3,181, ,075, USR Placement of impervious fill 188, LCY CREW-37 1, , , ,711 (Note: Assume 1.47 LCY/ECY.) USR Impervious fill, material only 276, TON ,181, ,181,536 (Note: Assume 1.4 TON/LCY (CAT Handbook Ed.31, page 28-4 for natural bed clay), 1.47 LCY/ECY, and 5% waste. Quote on 3/12/2008 by Keith B. Kimble of Kimble Clay & (330) for $10.75/TON.) USR Testing 1.00 LS ,000 (Note: Allow $50k.) ' Stripping 33, BCY ,872 52, , USR Strip topsoil & stockpile on site 33, BCY CREW ,872 52, ,722 (Note: Assumed material would be stripped and stockpiled nearby (no hauling required).) ' Topsoil 33, ECY ,476 74, , USR Spread & compact topsoil from stockpile 33, BCY CREW ,476 74, ,698 (Note: Assumed stripped material would be placed over blanket.) , , Seeding ACR ,704 13,353 25, , , , USR Seeding ACR CREW ,704 13,353 25, ,959 (Note: Referenced 2008 RS Means Heavy Construction, page 282, ) Partial Cuttoff Wall 620, SF 53, ,402,191 17,001,905 7,498,412 4,158,980 40,561,488 (Note: 141' Deep (135' deep + 5' impervious fill + 1' above impervious fill) x 4400 LF = 620,400 SF) Upstream Toe Cuttoff Wall 620, SF 53, ,402,191 17,001,905 7,498,412 4,158,980 40,561,

23 MII Independent Government Estimate Direct Costs Page 2 Description Quantity UOM CrewTag Duration DirectLabor DirectEQ DirectMatl DirectSubBid DirectCost 3.2 Excavation for 3' Wide Cuttoff Wall, Earth 68, BCY 35, ,958,219 14,598,001 1,891,024 4,036,500 27,483, Guidewall Excavation 620, SF 7, ,849 1,063, ,846, USR Excavation of guidewall 7, HR CREW-17 7, ,849 1,063, ,846,500 (Note: Hydromill excavation duration is 14,046 HR (see folder below) with two 12-HR shifts. Assumming excavation of guidewall takes place only during one 12-HR shift results in a duration of 7023 HR.) Hydromill Excavation 620, SF 14, ,236, , ,645,000 6,169, , , USR Setup time EA CREW-22 3, ,904 88, ,716 (Note: Referencing Mississinewa Final Report dated June 13, 2007, allow 10' panels with 1' of the secondary panels notching into the primary panels on each side. This results in 28' of wall for 3 panels; 4400 LF / 28' = 157 sections of 3 panels. 157 sections x 3 panels/section equals 471 panels.) USR Soil excavation w/ hydromill 620, SF CREW-22 8, ,348, , ,548,079 (Note: Referencing Mississinewa Final Report dated June 13, 2007, soil Excavation productivity is SF/HR.) USR Maintenance and repairs 620, SF CREW-23 1, , ,384 (Note: Referencing Mississinewa Final Report dated June 13, 2007, maintenance and repairs is 2,788 HR. Assume ¾ of time was due to rock and ¼ time was for soil since rock is more difficult to excavate. 2,788 HR x 25% = 697 HR; 330,806 SF of Mississinewa overburden/ 697 HR maintenance & repairs in overburden = 474 SF/HR for maintenance & repairs.) USR Standby 620, SF CREW , ,528 (Note: Referencing Mississinewa Final Report dated June 13, 2007, standby time is 1,065 HR. Assume ¾ of time was due to rock and ¼ time was for soil since rock is more difficult to excavate. 1,065 HR x 25% = 266 HR; 330,806 SF of Mississinewa overburden/ 266 HR standby in overburden = 1,242 SF/HR for standby.) , , USR Bauer BC32 hydromill with cutter and operator, rental per month MO ,645,000 3,645,000 (Note: Rental rate is $135,000/MO. Assume WK/MO x 6 DAY/WK x 10 HR/DAY = 260 HR/MO per shift; 14,046 HR / (260 HR/MO x 2 shifts) = 27 MO.) Bentonite Slurry 620, SF ,557, ,557,077 (Note: Referencing Wolf Creek Dam, the slurry mix weighs 70 LB/CF and takes approximately 22.6 LB of bentonite per CF of slurry. There is 22.6 LB/CF = LB of bentonite per CY. Assume bentonite can be recycled three times, therefore 610.2/3 = lbs of bentonite required per CY of excavation.) USR Bentonite, material only 154, CWT ,557, ,557,077 (Note: Referenced Wolf Creek estimate received in January 2007 for $8.40/CWT. Allow $10/CWT due to inflation. No quotes were obtained in time for completion of the baseline cost estimate.) Desanding Plant 68, SF , ,500 (Note: Treatment plant consists of two BE 250 and one GS 500 complete with fitting material. Total capacity is 132,000 gallon per hour. Installed power 190 HP. Voltage, Option 1 is 3 phase, 220V/60 Hz and Option 2 is 3 phase, 380V/50Hz. Weight is 14,500 kg. Rental rate is $14,500/MO. Consumption is 75 gallons per hour.) , , USR Desanding plant, rental per month MO , ,500 (Note: Rental rate is $14,500/MO. Assume WK/MO x 6 DAY/WK x 10 HR/DAY = 260 HR/MO per shift; 14,046 HR / (260 HR/MO x 2 shifts) = 27 MO.) Support Crew 68, SF 14, ,010,271 13,245,910 66, ,322, , , USR Support crew 12, HR CREW-20 12, ,622,575 13,153, ,776,112 (Note: This crew will support the desanding plant and pumping of material during the excavation operation. Hydromill excavation duration is 14,046 HR with 12,237 HR operating and 1,809 HR on standby for maintenance, repairs, and standby time.) USR Support crew (equipment on standby) 1, HR CREW-21 1, ,696 92, ,068 (Note: This crew will support the desanding plant and pumping of material during the excavation operation. Hydromill excavation duration is 14,046 HR with 12,237 HR operating and 1,809 HR on standby for maintenance, repairs, and standby time.)

24 MII Independent Government Estimate Direct Costs Page 3 Description Quantity UOM CrewTag Duration DirectLabor DirectEQ DirectMatl DirectSubBid DirectCost USR 6" perforated pipe, material only 9, LF , ,447 (Note: Estimator assumed one line would be used for bringing in the bentonite slurry and another line would be used for removing the excavated material (pump is included in support crew). Referenced 2008 RS Means Heavy Construction, page 316, for material cost. Total lenght of wall is 4400 LF x 2 lines = 8800 LF; use 9,000 LF. Setup and moving of pipe will be performed by the support crew as needed. This quantity was assumed to cover costs for broken/damaged lines that may occur during construction.) Repairs/Down-Time to Hydromill 1.00 LS , ,500 USR Material allowance for repairs 1.00 LS , ,500 (Note: Upon discussions with Bob Bowles, Nashville District, repairs to the hydromill teeth can occur often during project construction and be costly ($250,000 for Mississinewa). Allow $250,000 for repairs.) Geologist 1.00 LS , , USR Geologist 14, HR , ,832 (Note: Due to the complexity of the excavation process, estimator assumed a geologist would be on-site full-time for monitoring. Hourly rate used from Contract W D-0011, Bid Item #7, as obtained from EC-GG.) Concrete for 3' Wide Cuttoff Wall 69, CY 7, ,078,101 1,104,182 5,607, ,789, USR Concrete, material only 80, CY ,607, ,607,388 (Note: Assume 5% waste and 11.11% for extra material when the secondary panels are notched into the primary panels.) USR Tremie placement 7, HR CREW-39 7, ,078,101 1,104, ,182,284 (Note: Hydromill excavation duration is 14,046 HR with two 12-HR shifts. Assumming excavation of guidewall takes place only during one 12-HR shift results in a duration of 7,023 HR.) Excavation Spoil (Swell Factor = 1.2) 82, LCY 11, ,365,871 1,299, ,665,592 (Note: Currently, SF/HR x 3 FT wide x 24 HR/DAY results in 196 CY of material being excavated per day. These crews are assumed to work only 10 hours per day and not be on-site during the 2nd shift of work. The duration for the cutoff wall is 14,046 HR working 24-hour shifts or 7,023 HR for a 12-hour shift. Converting this to 10-hour shift results in 5,852.5 hours (7,023/12 * 10). Loading will be performed by the FE loader with the hydromill support crew. Hauling crew Dump truck w/ driver Spreading & compaction crew at spoil area (½ working/ ½ standby) Dozer w/ operator Roller w/ operator Water truck w/ driver Oiler (assist with loading/hauling and spreading/compaction)) USR Haul cuttings to spoil area 5, HR CREW-18 5, , , ,578 (Note: Loading is being performed by FE loader on hydromill support crew. Excavated material will be transported to the spoil area (remains of old quarry) located below the downstream right abutment.) USR Spread and compact cuttings at spoil area 5, HR CREW-35 5, ,110, , ,027, Verification Drilling LF , , , , USR Mob and Demob (Confined Space) 1.00 EA ,300 2,300 (Note: Referenced from drilling contract W D-0011, Bid Item #36, as obtained from EC-GG.) USR 4" Core Drilling, 4" wireline LF ,450 86,450 (Note: Referenced from drilling contract W D-0011, Bid Item #26, as obtained from EC-GG.) USR Hydraulic Pressure Testing EA ,480 25,480 (Note: Referenced from drilling contract W D-0011, Bid Item #28, as obtained from EC-GG. Cost includes pressure testing, grout, and placement of grout.) USR Inspector DAY ,250 8,250 (Note: Referenced from drilling contract W D-0011, Bid Item #9, as obtained from EC-GG. Each hole is about 50' in depth, therefore 906.4/50 = 19 holes. Assuming two holes can be completed in a 10-HR day, this equates to 19 holes / 2 holes per day = say 10 days.) * Test Section 1.00 LS ,000

25 MII Independent Government Estimate Direct Costs Page 4 Description Quantity UOM CrewTag Duration DirectLabor DirectEQ DirectMatl DirectSubBid DirectCost USR Test section allowance 1.00 LS ,000 (Note: Allow $500k. Test section will become part of permanent wall therefore labor/equipment/materials are included in folders above. This allowance is for the testing/waiting/approval by and for the contractor's work. Assume 1-month additional time required on project schedule.) Abutment Cutoff Wall 48, SF ,007 24,176 99,619 1,670,020 1,844, , , , , Clearing/Grubbing 0.50 ACR ,910 2, , , , , USR Clearing & Grubbing 0.50 ACR CREW ,910 2, , , , USR Tree allowance 0.50 ACR (Note: Allow $1,000/ACR for the cost of trees reimbursable to the Government.) Abutment Cuttoff Wall 48, SF ,440,000 1,440, USR Construction of cement/bentontite slurry wall 48, SF ,440,000 1,440,000 (Note: No details are available at this stage as to what the cement/bentonite mixture is, only that it will not be a full concrete cutoff wall. Cost referenced from drilling data received from Jim Rose on April 22, 2008 for similar contract currently being performed in Jacksonville District. Cost is $27.40/SF which includes excavation into earth/rock, cement/bentonite material and placement, and spoil of material. Use $30/SF.) , , , , Seeding 0.50 ACR ,391 1, , , , , , USR Seeding 0.50 ACR CREW ,391 1, ,469 (Note: Referenced 2008 RS Means Heavy Construction, page 282, ) Remove and Replace Culvert, 12" CMP LF , USR Trench excavation with backhoe 6.00 BCY CREW USR Demo 12" CMP pipe LF CREW USR Bank run sand, material only 2.20 TON (Note: Quote on 3/12/2008 by Keith B. Kimble of Kimble Clay & (330) for $9.00/TON.) USR Place & compact sand 1.50 ECY CREW USR 12" BCCMP pipe LF CREW ,166 (Note: Referenced 2008 RS Means Heavy Construction, page 310, ) USR Backfill & compaction 4.10 LCY CREW USR Haul material to spoil, 12 CY truck, 2 mile round trip 3.20 LCY CREW , , , Remove and Replace Flag Pole 1.00 EA , , ,

26 MII Independent Government Estimate Direct Costs Page 5 Description Quantity UOM CrewTag Duration DirectLabor DirectEQ DirectMatl DirectSubBid DirectCost USR Demo flagpole 1.00 EA CREW , , USR Flagpole foundation, 40' to 50' high, includes excavation & concrete 1.00 EA CREW , ,562 (Note: Referenced 2008 RS Means Building Construction, page 334, ) , , USR Flagpoles, steel, direct imbedded installation, 50' high 1.00 EA CREW , ,225 (Note: Referenced 2008 RS Means Building Construction, page 334, ) , Remove and Replace Monument ,000 USR Remove and replace monuments 1.00 LS ,000 (Note: Allow $10k.) Remove and Replace Chain Link Fence LF , , , USR Remove existing fence, includes hauling LF CREW USR Chain link fence, industrial, aluminized steel, in concrete, 6 ga. wire, 2-1/2" 10' OC, 8' high, includes excavation (Note: Referenced 2008 RS Means Heavy Construction, page 269, ) LF CREW , , , , , Remove and Replace Light Pole 1.00 EA , , , USR Demo lightpole 1.00 EA CREW , , USR Light pole, aluminum, 40' high w/ 1 bracket arm 1.00 EA CREW , ,502 (Note: Referenced 2008 RS Means Heavy Construction, page 197, /3800.) , , USR Lightpole foundation, 40' to 50' high, includes excavation & concrete 1.00 EA CREW , ,562 (Note: Referenced 2008 RS Means Building Construction, page 334, ) Demolish Roadway 1, SY ,076 9,651 18, , USR Demo bituminous pavement, 4" to 6" thick (includes loading and hauling) 1, SY CREW ,076 9, ,727 (Note: Referenced 2008 RS Means Heavy Construction, page 23, Allow 40 hours.) USR Disposal fees TON , ,864 (Note: Quote on 4/8/08 from Countywide Recycling and Disposal Facility for Construction & Demolition material (C&D) material is $30/TON with an additional $1.06/TON for EPA fees. Assume 6" thick asphalt and 110 LB/SY per inch thickness.) Roadway Replacement 1, SY ,453 8,743 64,780 8,600 95, Prepare & Roll Subbase 1, SY ,505 1, , USR Prepare and roll sub-base 1, SY CREW ,505 1, ,595 (Note: Allow 10 HR.) Filter Fabric 1, SY , , ,368

27 MII Independent Government Estimate Direct Costs Page 6 Description Quantity UOM CrewTag Duration DirectLabor DirectEQ DirectMatl DirectSubBid DirectCost USR Filter fabric installation 1, SY CREW , ,667 (Note: Allow 10 HR.) USR Filter fabric, Mirafi HP 665, material only 1, SY , ,701 (Note: Quote referenced from recent project at Minersville, OH. Quote on 12/14/2006 by Glenn Dupilka of JMD (412) for $2.95/SY. Assume 5% overlap.) " Aggregate Class I ECY ,482 3,364 11, , USR 8" aggregate, Class I, material only TON , ,714 (Note: Assume 1.5 TON/LCY and 1.14 LCY/ECY. Quote on 3/12/2008 by Keith B. Kimble of Kimble Clay & (330) for $16.75/TON.) USR Placement of aggregate CY CREW ,482 3, ,846 (Note: Allow 10 HR.) /2" Intermediate Course CY ,820 1,618 13, , USR Asphaltic concrete pavement, 2-1/2" intermediate course TON CREW ,820 1,618 13, ,730 (Note: Cost referenced from 2008 RS Means Heavy Construction, page 261, Assume 2 TON/CY. Allow 5 HR.) /2" Top Course CY ,820 1,618 14, , USR Asphaltic concrete pavement, 2-1/2" top course TON CREW ,820 1,618 14, ,497 (Note: Cost referenced from 2008 RS Means Heavy Construction, page 261, Assume 2 TON/CY. Allow 5 HR.) Tack Coat 1, SY , , USR Tack coat, 0.10 gal per SY 1, SY CREW , ,945 (Note: Cost referenced from 2008 RS Means Heavy Construction, page 254, ) Prime Coat 1, SY , , USR Prime coat, 4 oz per SY 1, SY CREW , ,930 (Note: Cost referenced from 2008 RS Means Heavy Construction, page 254, ) Guardrail (remove and replace) LF , ,162 8,600 27, USR Remove Guardrail LF ,600 8, USR Install guardrail LF CREW , , ,351 (Note: Referenced 2008 RS Means Heavy Construction, page 340, Allow 10 HR.) Storm Drain, 4" PVC LF

28 MII Independent Government Estimate Direct Costs Page 7 Description Quantity UOM CrewTag Duration DirectLabor DirectEQ DirectMatl DirectSubBid DirectCost USR Trench excavation with backhoe 3.00 BCY CREW USR Place & compact sand 1.00 ECY CREW USR Bank run sand, material only 1.10 TON (Note: Quote on 3/12/2008 by Keith B. Kimble of Kimble Clay & (330) for $9.00/TON.) USR 4" SDR 35 PVC Pipe LF CREW (Note: Referenced 2008 RS Means Heavy Construction, page 308, ) USR Backfill & compaction 3.00 LCY CREW USR Haul material to spoil, 12 CY truck, 2 mile round trip 1.00 LCY CREW Temporary Relocate/ Replace Sewer Line, 4" PVC LF , , Remove Existing Sewer Line, 4" PVC LF USR Trench excavation with backhoe 3.00 BCY CREW USR Demo and remove existing pipe LF CREW USR Backfill & compaction 4.00 LCY CREW Install Temporary Sewer Line, 4" PVC LF USR Trench excavation with backhoe 3.00 BCY CREW USR Place & compact sand 1.00 ECY CREW USR Bank run sand, material only 1.10 TON (Note: Quote on 3/12/2008 by Keith B. Kimble of Kimble Clay & (330) for $9.00/TON.) USR 4" SDR 35 PVC Pipe LF CREW (Note: Referenced 2008 RS Means Heavy Construction, page 308, ) USR Backfill & compaction 3.00 LCY CREW USR Haul material to spoil, 12 CY truck, 2 mile round trip 1.00 LCY CREW Remove Temporary Sewer Line, 4" PVC LF USR Trench excavation with backhoe 3.00 BCY CREW USR Demo and remove existing pipe LF CREW

29 MII Independent Government Estimate Direct Costs Page 8 Description Quantity UOM CrewTag Duration DirectLabor DirectEQ DirectMatl DirectSubBid DirectCost USR Backfill & compaction 4.00 LCY CREW Install Permanent Sewer Line, 4" PVC LF USR Trench excavation with backhoe 3.00 BCY CREW USR Place & compact sand 1.00 ECY CREW USR Bank run sand, material only 1.10 TON (Note: Quote on 3/12/2008 by Keith B. Kimble of Kimble Clay & (330) for $9.00/TON.) USR 4" SDR 35 PVC Pipe LF CREW (Note: Referenced 2008 RS Means Heavy Construction, page 308, ) USR Backfill & compaction 3.00 LCY CREW USR Haul material to spoil, 12 CY truck, 2 mile round trip 1.00 LCY CREW Temporary Relocate/ Replace Water Line, 1" PE LF , , Remove Existing Water Line, 1" PE LF USR Trench excavation with backhoe, expose pipe 3.00 BCY CREW USR Demo and remove existing pipe LF CREW USR Backfill & compaction 4.00 LCY CREW Install Temporary Water Line, 1" PE LF USR Trench excavation with backhoe, expose pipe 3.00 BCY CREW USR Place & compact sand 1.00 ECY CREW USR Bank run sand, material only 1.10 TON (Note: Quote on 3/12/2008 by Keith B. Kimble of Kimble Clay & (330) for $9.00/TON.) USR 1" polyethylene pipe, C901, 160 PSI LF CREW (Note: Referenced 2008 RS Means Heavy Construction, page 298, ) USR Haul material to spoil, 12 CY truck, 2 mile round trip 1.00 LCY CREW USR Backfill & compaction 3.00 LCY CREW

30 MII Independent Government Estimate Direct Costs Page 9 Description Quantity UOM CrewTag Duration DirectLabor DirectEQ DirectMatl DirectSubBid DirectCost Remove Temporary Water Line, 1" PE LF USR Trench excavation with backhoe, expose pipe 3.00 BCY CREW USR Demo and remove existing pipe LF CREW USR Backfill & compaction 4.00 LCY CREW Install Permanent Water Line, 1" PE LF USR Trench excavation with backhoe 3.00 BCY CREW USR Place & compact sand 1.00 ECY CREW USR Bank run sand, material only 1.10 TON (Note: Quote on 3/12/2008 by Keith B. Kimble of Kimble Clay & (330) for $9.00/TON.) USR 1" polyethylene pipe, C901, 160 PSI LF CREW (Note: Referenced 2008 RS Means Heavy Construction, page 298, ) USR Backfill & compaction 3.00 LCY CREW USR Haul material to spoil, 12 CY truck, 2 mile round trip 1.00 LCY CREW Temporary Relocate/ Replace UG Electric to Office LF , , Remove Existing UG Electric to Office LF USR Trench excavation with backhoe 3.00 BCY CREW USR Backfill & compaction 4.00 LCY CREW USR Demo and remove existing pipe LF CREW USR Removal current connections 1.00 HR CREW (Note: Allow 1 hour.) Install Temporary UG Electric to Office LF USR Trench excavation with backhoe 3.00 BCY CREW USR Place & compact sand 1.00 ECY CREW USR Bank run sand, material only 1.10 TON (Note: Quote on 3/12/2008 by Keith B. Kimble of Kimble Clay & (330) for $9.00/TON.)

31 MII Independent Government Estimate Direct Costs Page 10 Description Quantity UOM CrewTag Duration DirectLabor DirectEQ DirectMatl DirectSubBid DirectCost USR 2" PVC Conduit, 2" diameter LF CREW (Note: Referenced 2008 RS Means Heavy Construction, page 329, ) USR Underground cable, #6, type USE LF CREW (Note: Referenced 2006 MII English Cost Book, Source Tag ) USR Backfill & compaction 3.00 LCY CREW USR Testing 1.00 HR CREW (Note: Allow 1 hour.) Remove Temporary UG Electric to Office LF USR Trench excavation with backhoe 3.00 BCY CREW USR Backfill & compaction 4.00 LCY CREW USR Demo and remove existing pipe LF CREW USR Removal current connections 1.00 HR CREW (Note: Allow 1 hour.) Install Permanent UG Electric to Office LF USR Trench excavation with backhoe 3.00 BCY CREW USR Place & compact sand 1.00 ECY CREW USR Bank run sand, material only 1.10 TON (Note: Quote on 3/12/2008 by Keith B. Kimble of Kimble Clay & (330) for $9.00/TON.) USR 2" RGS Conduit, 2" diameter LF CREW (Note: Referenced 2008 RS Means Heavy Construction, page 329, ) USR Backfill & compaction 3.00 LCY CREW USR Underground cable, #6, type USE LF CREW (Note: Referenced 2006 MII English Cost Book, Source Tag ) USR Testing 1.00 HR CREW (Note: Allow 1 hour.) Temporary Relocate/ Replace UG Telephone to Intake LF , , Remove Existing UG Telephone to Intake LF