Navy: Hangar One Detailed Cost Estimate

Hangar 1Engineering Evaluation/Cost Analysis

Detailed Cost Estimate

NAS Moffett Field – Hangar 1


• Overview

• Cost Estimating Approach

• Subcontractor and Vendor Cost Data

• Developing Total Project Cost

• Developing Costs for the EE/CA Alternatives

Alternative 4 – Cost Overview


AGENDA


OVERVIEW

• The Navy has spent over 6,500 hours evaluating the alternatives described in the EE/CA

• The Navy has worked with Regulatory Agencies and NASA throughout the process

• Each alternative includes remediation costs plus 30 years to operate and maintain (O&M) the remedy

• This presentations describes the process used to prepare the cost estimate for each alternative


COST ESTIMATING APPROACH

• Developed detailed scopes of work

• Site walks

• Historic pricing

• Vendor quotes

• Tested some coatings for suitability

• Obtained information and visited Akron, OH hangar



• Cost Estimates were initially developed as an actual proposal to the Navy to perform the work

• Site Visits used to develop detailed project approach

• Detailed estimates included input from experienced engineers, construction mangers, and subcontractors

• Walk through the estimate preparation details



• Step 1 – Define the scope in terms of quantities– Review the Navy’s overall objective– Break the work down into distinct pieces using a Work

Breakdown Structure (WBS)– Define the scope for each WBS– Determine quantities for each WBS – feet, labor hours,

tons, etc. – Perform site visits to validate assumptions– Determine crew sizes, material, and equipment required


• Step 2 – Develop unit rates costs– Labor Rates – Professional and Craft– Equipment Costs– Material and Supply Costs– Subcontractor Costs



• Step 3 – Develop Cost Estimate for each WBS– Develop production rates based on crew sizes

• Determines duration for each WBS

– Apply unit rates to the quantities and schedule – Obtain Expert Input – Construction, Engineering,

Schedulers, and Cost Controllers– Obtain subcontractor and vendor bids for specialty

services, materials, and equipment


SUBCONTRACTOR AND VENDOR COST DATA

• Define services or materials to be subcontracted• Identify potential subcontractors and vendors• Develop detailed statements of work• Solicit pricing• Evaluate bids received

– Were any exceptions taken by bidder?– Are all costs included? (i.e., taxes, permits, bonds, etc.)– Does the proposed schedule (work hours and duration) meet

overall schedule requirements– Involve Proposal Team and Specialists (Legal, Procurement,

Regulatory Compliance, H&S, Management, etc.) as necessary


SUBCONTRACTOR AND VENDOR COST DATA

• Address items requiring clarifications– Pricing, terms and conditions, bonds, insurance, and wage rates

often require discussion and clarification

• Verify bidders qualifications• Select pricing to use in estimate

– Lowest responsive, responsible bidder


TOTAL PROJECT COSTS

• Step 4 – Develop the total project cost

– Quantity, resource, and pricing data was input into the WBS tasklevel

– Preliminary Schedule was developed to determine estimated project duration

– Project Support and Management costs determined based upon anticipated durations

– All costs combined to determine total estimated project values


EE/CA ALTERNATIVES

• Same methodologies were utilized in pricing each alternative for the EE/CA

• Initial Detailed estimate was developed, and modified for each EE/CA Alternative

• Same Cost Basis and Markups applied to all Alternatives


DEVELOPING COSTS FOR THE EE/CA ALTERNATIVES

• Followed the steps just outlined in developing costs for each EE/CA alternative

• Multiple subcontractors solicited for pricing

• Subcontractor pricing included site visits for major subcontractors

• Discuss each alternative in following slides


ACTIVITIES COMMON TO ALL ALTERNATIVES

• Mobilization & Site Preparation− Developed Level of Effort (LOE) to support anticipated tasks

− Utilized Engineer’s Estimate for Utility Isolation scope

• Interior Building Abatement and Demolition− Pricing based on subcontractor bids

• Environmental Sampling & Monitoring− Pricing based on subcontractor bids for unit rates

− Validated using past pricing from the site for similar services

• Demobilization− Pricing based on crew size and equipment used


ACTIVITIES COMMON TO ALL ALTERNATIVES (continued)

• Meetings, Project Documents, General Site Requirements− Pricing based on experience with projects of similar nature,

and project management of projects at this location

• O&M (30 years)− Pricing based on subcontractor bids, annualized over 30 yrs

(except no O&M costs for Alternative 11 since building would no longer be present)


ALT 2 – COVER WITH RUBBERIZED MATERIAL

• Exterior and Interior Removal Actions−Rubberized material would be placed over existing siding− Pricing based on subcontractor bids for exterior cover

installation and interior coatings− Structural System Retrofit based on Subcontractor’s

Conceptual Level Cost Estimate


ALT 4 – COAT WITH ACRYLIC COATING

• Exterior and Interior Removal Actions−Acrylic coating would be placed over existing siding

− Pricing based on subcontractor bids for interior & exterior coatings

− Structural System Retrofit based up Subcontractor’s Conceptual Level Cost Estimate


ALT 6 – COVER WITH NEW VISUALLY SIMILAR SIDING

• Exterior and Interior Removal Actions−Visually similar siding would be placed over existing siding− Pricing based up subcontractor bids for interior & exterior

coatings− Structural System Retrofit based on Subcontractor’s

Conceptual Level Cost Estimate


ALT 10 – REMOVE SIDING AND COAT EXPOSED SURFACES

• Interior Building Abatement and Demolition−Validated by preparing independent estimate of crew size

and equipment for structure demolition, sizing, and load-out using input from experienced Construction staff

− Pricing based on subcontractor bids

• Exterior and Interior Removal Actions− Pricing based on subcontractor bids

• Structure Demolition (Siding Removal and Structural Retrofit)− Pricing based on subcontractor bids and Subcontractor’s

Conceptual Level Cost Estimate for Structural Retrofit


ALT 11 – DEMOLISH AND REMOVE HANGAR

• Interior Building Demolition− Pricing based on subcontractor bids

• Waste Management, Transport, and Disposal− Volume based on quantity takeoffs of waste streams developed

from available facility drawings

− Unit rates for disposal based on subcontractor bids

− Crews for load-out & sizing based on TtEC experience

• Structure Demolition− Validated by preparing independent estimate of crew size and

equipment for structure demolition, sizing, and load-out using input from experienced Construction staff

− Pricing based on subcontractor bids


REMOVAL ACTION ALTERNATIVES AND

HISTORIC MITIGATION MEASURES COST SUMMARY1


Notes:1 Cost detail is provided in Appendix C. Summary costs are within the Environmental Protection Agency Guidance Range of –30 percent to +50 percent for study estimates.2 Level I HAER documentation, oral histories of individuals who worked in the hangar during different eras, virtual Hangar 1 interactive CD, and inventory-catalogue of Hangar 1

collections contained in Moffett Historical Museum.3 Includes costs for applying and maintaining an exterior coat that matches the hangar’s original colors.4 Includes costs for covering the hangar structural frame and roof with a siding similar in appearance to the original hangar siding and replacement of windows and access doors.5 Includes costs for preservation of man-cranes.6 Protective coating will be similar in color to the original siding.

Costs are accurate within the EPA Guidance Range of -30% to +50%

$26,680,000$0$26,680,000$350,000$26,330,000Alternative 11 –

Demolish and Remove Hangar

$41,070,000$14,910,0004$26,160,000$350,000$25,810,0006Alternative 10 –

Remove Siding and Coat Exposed Surfaces

$53,030,000$3,370,0003$49,660,000$350,000$49,310,000Alternative 6 –

Cover with New Visually Similar Siding

$48,920,000$0$48,920,000$350,000$48,570,000Alternative 4 –Coat with Acrylic Coating

$53,220,000$3,370,0003$49,850,000$350,000$49,500,000Alternative 2 –

Cover with Rubberized Material

Removal Action, Historic Mitigation, and Other

Historic Mitigation Cost

Other Historic Mitigation

Removal Action and Historic Mitigation2

Cost

Historic2

MitigationRemoval5

Action CostsAlternative



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Navy: Hangar One Detailed Cost Estimate