STRATFORD WATER TOWER REPLACEMENT

STRATFORD WATER TOWER REPLACEMENT

Tank Alternatives Memorandum

B&V PROJECT NO. 402979 B&V FILE NO. 40.1000

PREPARED FOR

Lawrence, Kansas

26 NOVEMBER 2019

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Lawrence, Kansas | STRATFORD WATER TOWER REPLACEMENT – TANK ALTERNATIVES MEMORANDUM

BLACK & VEATCH | Table of Contents i

Table of Contents 1.0 Introduction .............................................................................................................................................. 1

1.1 Background ................................................................................................................................................. 1

1.2 New Tank Location ................................................................................................................................... 2

2.0 Evaluation of Tank Alternatives ........................................................................................................ 3

2.1 Elevated Tank Alternatives and Materials...................................................................................... 3

2.1.1 Materials and Methods of Construction ....................................................................... 3

2.1.2 Evaluation Criteria................................................................................................................. 4

2.2 Cost Considerations ................................................................................................................................. 5

2.2.1 Life-Cycle Cost Analysis ....................................................................................................... 5

2.2.2 Criteria Ranking ...................................................................................................................... 7

2.2.3 Total Construction Costs ..................................................................................................... 8

3.0 Recommendations .................................................................................................................................. 9

3.1 Tank Alternative ........................................................................................................................................ 9

3.2 Tank Size ....................................................................................................................................................... 9

Appendix A. Figures ...................................................................................................................................... A-1

Appendix B. Estimating Guide for Surface Areas of Water Tanks ................................................ B-1

Appendix C. Fabricator Quotations ......................................................................................................... C-1

Appendix D. Life-Cycle Cost Analysis Calculations ............................................................................. D-1

LIST OF TABLES Table 2-1 Tank Dimensions....................................................................................................................................... 5

Table 2-2 Life-Cycle Cost Analysis - 0.5 MG ........................................................................................................ 6

Table 2-3 Life-Cycle Cost Per Gallon - 0.5 MG .................................................................................................... 6

Table 2-4 Life-Cycle Cost Analysis – 0.75 MG .................................................................................................... 7

Table 2-5 Life-Cycle Cost Per Gallon – 0.75 MG ................................................................................................ 7

Table 2-6 Tank Alternative Selection Matrix – 0.5 MG .................................................................................. 7

Table 2-7 Tank Alternative Selection Matrix – 0.75 MG ................................................................................ 8

Table 2-8 Preliminary OPCC .................................................................................................................................... 8

LIST OF FIGURES Figure 1-1 Existing Stratford Tank ......................................................................................................................... 1

Figure 1-2 Stratford Park Plan ................................................................................................................................... 2


BLACK & VEATCH | Introduction 1

1.0 Introduction

1.1 BACKGROUND The existing Stratford Water Tower was constructed in 1954 and provides 500,000 gallons of storage and is shown in Figure 1-1 below. The height of overflow on the tank is 132 feet above grade (EL 1174). The Stratford tank is located in the West Hills service area and has a large influence on the pressure within the vicinity of the tank. There is currently equipment from three cellular providers as well as the Douglas County Emergency Services (EMS) mounted on the tank.

Figure 1-1 Existing Stratford Tank

The Stratford Preliminary Alternatives Evaluation Report completed in December 2014 evaluated construction of a new tank as well as rehabilitation of the existing tank. The evaluation found that, at a minimum, major structural and coating repairs were needed to keep the existing tank in service for an additional 20 years. Other necessary upgrades included an OSHA-compliant ladder and climbing system. The tank was initially coated with lead-based paint and has subsequently been encapsulated with another coating system. An economic evaluation determined that the total net present value of performing the repairs and re-coating the tank was similar in life-cycle cost to constructing a new tank. It was also recognized that the process of removing the lead-based paints, in close proximity to the adjoining neighborhood was undesirable. Therefore, it was decided that it


BLACK & VEATCH | Introduction 2

was in the best interest of the City to move forward with replacement of the tank. This memorandum provides a technical review and life-cycle cost evaluation of the various tank styles available for the project.

1.2 NEW TANK LOCATION The current tank is located in the northwest corner of the park as shown on Figure 1-2 below. All of the buildings for the telecommunications equipment are located within a fenced area around the current tank. The southwest corner of the park has several mature trees and playground equipment. The southeast corner of the park includes a small ballfield and backstop. The preferred location for the new tank is the northeast corner of the park which is the least utilized at this time. If the decision is made to move the telecommunications equipment onto a monopole structure rather than the new tank, then the northwest corner of the park is a viable option for the monopole location. Construction of the tank in another location in the park will allow for demolition of the existing tank after the new tank is placed in service. Input from the public is anticipated with regard to the location of the new tank before detailed design commences.

Figure 1-2 Stratford Park Plan

CITY

PROPERTY

STRATFORD

WATER TOWER


BLACK & VEATCH | Evaluation of Tank Alternatives 3

2.0 Evaluation of Tank Alternatives Four elevated tank styles are available for the current Stratford tank volume of 0.5 million gallons (MG): spheroid, hydropillar, composite, and multi-column (similar to the existing). A limited number of manufacturers fabricate elevated tanks at this capacity and some tank styles are only produced by a single manufacturer. This memorandum evaluates the four alternatives of tanks in two volumes (0.5 MG and 0.75 MG) and their associated life-cycle costs. It is assumed a separate monopole will be constructed for the cellular providers; the Douglas County EMS equipment will be relocated to the new tank.

2.1 ELEVATED TANK ALTERNATIVES AND MATERIALS The following criteria were evaluated for each tank:

◼ Materials of Construction

◼ Methods of Construction

◼ Tank Fabricators

◼ Maintenance

◼ Secondary Uses

◼ Bidding Competitiveness of Alternatives

2.1.1 Materials and Methods of Construction

2.1.1.1 Spheroid

The spheroid elevated tank is an all steel structure with a single column supporting a reservoir at the top. The column is the access tube and encloses the ladder and piping to the reservoir above. The base is a flared cone section which distributes the load and allows room for basic controls, electrical panels, and valves. Access to the reservoir is through a lockable manway in the cone base. Figure 1 in Appendix A shows an isometric view of a typical spheroid elevated tank.

The all steel tank requires interior and exterior coating systems. Compared to the hydropillar and composite alternatives, the spheroid requires a slightly smaller foundation footprint. It is our understanding that McDermott, Caldwell, and Landmark are qualified under the Black & Veatch specification standards to fabricate spheroid tanks capable of storing 0.5 and 0.75 MG.

2.1.1.2 Hydropillar

The hydropillar is an all steel structure with a large diameter column supporting a reservoir at the top. The column is fluted to provide additional structural support. The access ladder, piping, electrical, and controls are all housed inside of the column. The all steel tank requires interior and exterior coating systems.

Figure 2 in Appendix A shows an isometric view of a typical hydropillar elevated tank.

It is our understanding that only McDermott and Caldwell Tanks are qualified under the Black & Veatch specification standards to fabricate hydropillars capable of storing 0.5 and 0.75 MG.



2.1.1.3 Composite

The composite elevated tank is similar to a hydropillar elevated tank, but utilizes a reinforced concrete column. The exterior of the concrete column generally has an architectural finish achieved by using form liners. The steel reservoir is coated on the interior and exterior. Figure 3 in Appendix A illustrates a typical composite elevated tank.

Currently, only McDermott, Caldwell Tanks, and Landmark Structures are qualified under the Black & Veatch specification standards to fabricate composite tanks capable of storing 0.5 and 0.75 MG.

Landmark Structures and McDermott construct the column by pouring sections, whereas Caldwell Tanks uses a rigid steel jump-form system that utilizes a series of three rings of 4-foot forms. Any slight color variations in Landmark or McDermott columns appear as blocks, where color variations in Caldwell columns appear as a spiral. To minimize the spiral pattern in the concrete, Caldwell Tanks has modified their construction methods to require two concrete trucks unloading at the same time.

2.1.1.4 Multi-Column

The multi-column tank matches the current style of the Stratford tank. The all steel tank requires interior and exterior coating systems. The multi-column tank requires the largest overall tank footprint when compared to the other alternatives.

Our research indicates that, at this time, only Caldwell Tanks offers multi-column tanks capable of storing 0.5 and 0.75 MG.

2.1.2 Evaluation Criteria

2.1.2.1 Coating Maintenance

With a greater amount of coated surface area, the cost associated with maintenance and re-coating of the multi-column, hydropillar, and spheroid tanks is greater than the composite tank. The hydropillar has the most surface area. Composite tanks only require maintenance and re-coating on the interior and exterior of the steel reservoir. Refer to Section 2.2.1.3 below for additional information on surface areas for the different types of tanks.

2.1.2.2 Secondary Uses

Hydropillars and composite tanks have nearly identical secondary uses due to their large diameter columns; an overhead door can be installed, and the interior areas can be used to house control panels such as programmable logic controllers (PLCs), and other operational equipment which is much preferred from an O&M perspective. They also can be finished for use as maintenance shops, offices, or general storage. Windows and an additional level above the first floor may also be installed. Due to the limited usable area in the cone base of the spheroid tank, overhead doors and finished areas are not available.

2.1.2.3 Tank Dimensions and Foundations

For this analysis, the existing Stratford tank overflow height of 132 ft was used to determine costs. Benefits regarding changes in tank elevation will be assessed during subsequent phases of design. Approximate tank dimensions are summarized in Table 2-1 (on the following page), but will vary slightly with the tank type and fabricator. Tank surface area estimations can be found in Appendix B.



Table 2-1 Tank Dimensions

COMPOSITE SPHEROID HYDROPILLAR MULTI-COLUMN

0.5 MG

Tank Diameter 50 56 50 50

Base Diameter 30 28 30 64

0.75 MG

Tank Diameter 69 66 64 60

Base Diameter 32 30 42 60

While the column supporting the spheroid tank has a smaller diameter, the cone base is nearly the same diameter as the hydropillar and composite bases. Therefore, the foundation system will be very similar and thus cost savings for the spheroid alternative are negligible.

Regardless of the tank selection, a continuous ring footing foundation system is anticipated based on the allowable bearing pressure. The specific foundation system will be developed during detailed design.

2.1.2.4 Bidding Competitiveness of Alternatives

◼ Spheroid Tank – 3 fabricators (McDermott, Caldwell Tanks, and Landmark Structures)

◼ Hydropillar Tank – 2 fabricators (McDermott and Caldwell Tanks)

◼ Composite Tank – 3 fabricators (McDermott, Caldwell Tanks, and Landmark Structures)

◼ Multi-Column Tank – 1 fabricator (Caldwell Tanks)

Because the multi-column tank is only fabricated by one company, selecting this alternative would effectively sole source the tank with no opportunity for competitive bidding. Selecting the spheroid, hydropillar, or composite alternative includes multiple manufacturers, which should result in a competitive bidding environment for the City.

2.2 COST CONSIDERATIONS

2.2.1 Life-Cycle Cost Analysis

The life-cycle cost analysis (LCCA) combines the upfront tank construction cost and future maintenance costs for each alternative to evaluate and understand which provides the most cost-effective solution.

The LCCA is based on the present value of future tank maintenance costs. The analysis applies a discount factor to future maintenance costs, depending on when they are scheduled to occur in the future, to give like terms comparison between alternatives. In simplest terms, the present value of a future cost is the amount of money needed in an interest-bearing account at a certain real interest rate (the discount rate).

2.2.1.1 Discount Rate

The analysis used a discount rate of 1.5%, which corresponds to the interest rate less the inflation rate obtained from the Federal Office of Management and Budget (M-19-05, November, 2018). Note



that the assumed discount rate is a key component to the calculation and given a different inflation or interest rate, the calculation would yield a different result.

2.2.1.2 Analysis Period

To develop the LCCA, the evaluation period was assumed to be 60 years, which includes scheduled maintenance at 20 years and 40 years.

2.2.1.3 Maintenance Cost Development

The re-coating costs were developed based on an average cost per square foot value observation of several recent projects. Recent bid tabulations for tank re-coating projects were evaluated for cost per square foot and averaged. Service life of the coating systems was assumed to last 20 years. The surface areas required to be coated were taken from the Estimating Guide for Surface Areas of Water Tanks by Tnemec Company (Appendix B).

As the regulatory trends continue to attempt to reduce environmental and health effects of sandblasting and spraying elevated tanks, the potential cost impacts for more stringent future regulations should be considered. Since the composite tank has the least amount of coated area, it would be least impacted by future rising coating maintenance costs caused by increased regulation.

2.2.1.4 Capital Cost

Three fabricators were contacted to obtain budget costs associated with the tank and foundation system for the respective styles of tanks they offer at storage capacities of 0.5 and 0.75 MG. The submitted costs were evaluated and modified to ensure equal comparison. Quotes and modifications can be found in Appendix C. The scope for each tank includes tank construction, field coatings, foundation, and basic electrical work. All site modifications that would be similar for each alternative (piping, grading, fence, etc.) have been excluded to provide a more direct comparison of the tank alternatives. Each tank alternative analysis utilizes the average of the submitted budgetary quotes, including a 10% contingency.

2.2.1.5 Results & Analysis

The full LCCA can be found in Appendix D and is summarized in Tables 2-2 through 2-5 below.

Table 2-2 Life-Cycle Cost Analysis - 0.5 MG


Capital Cost $1,554,000 $1,665,000 $2,200,000 $1,226,000

NPV of Maintenance (60 YR) $258,000 $283,000 $537,000 $333,000

Total $1,811,000 $1,948,000 $2,737,000 $1,560,000

Table 2-3 Life-Cycle Cost Per Gallon - 0.5 MG


Reservoir Cost/Gallon $3.11 $3.33 $4.40 $2.45

Maintenance Cost/Gallon $0.52 $0.57 $1.07 $0.67

Total NPV Cost/Gallon $3.62 $3.90 $5.47 $3.12



Table 2-4 Life-Cycle Cost Analysis – 0.75 MG


Capital Cost $1,843,000 $2,048,000 $2,585,000 $1,595,000

NPV of Maintenance (60 YR) $339,000 $376,000 $789,000 $490,000

Total $2,182,000 $2,424,000 $3,374,000 $2,085,000

Table 2-5 Life-Cycle Cost Per Gallon – 0.75 MG


Reservoir Cost/Gallon $2.46 $2.73 $3.45 $2.13

Maintenance Cost/Gallon $0.45 $0.50 $1.05 $0.65

Total NPV Cost/Gallon $2.91 $3.23 $4.50 $2.78

All tank alternatives, across the three manufacturers, resulted in a similar reduction in capital cost in relation to capacity as reflected by the similar values in costs per gallon. The hydropillar alternative realized similar cost reductions but was still the highest. For the multi-column tank, the costs were the lowest of the alternatives. Because Caldwell is the only manufacturer that is qualified to manufacturer this style of tank, there is added risk in choosing this tank alternative due to lack of competition. The composite and spheroid costs were very similar in comparison, but the spheroid style tank has a higher maintenance cost due to the higher surface area requiring re-coating.

2.2.2 Criteria Ranking

Based on the previously listed criteria, including the LCCA, Tank Alternative Selection Matrices (Table 2-6 and 2-7) have been developed. Each criterion is rated on a scale of 1 to 4 with 1 being most desirable and 4 being least desirable.

Table 2-6 Tank Alternative Selection Matrix – 0.5 MG

0.5 MG COMPOSITE SPHEROID HYDROPILLAR MULTI-COLUMN

Capital Cost 2 3 4 1

Life Cycle Cost 2 3 4 1

Maintenance 1 2 4 3

Interior Space/Secondary Use 1 3 1 4

Bidding Competition 1 1 3 4

Total 7 12 16 13



Table 2-7 Tank Alternative Selection Matrix – 0.75 MG

0.75 MG COMPOSITE SPHEROID HYDROPILLAR MULTI-COLUMN

Capital Cost 2 3 4 1

Life Cycle Cost 2 3 4 1

Maintenance 1 2 4 3

Interior Space/Secondary Use 1 3 1 4

Bidding Competition 1 1 3 4

Total 7 12 16 13

The analysis for both 0.5 and 0.75 MG tanks indicate that the composite tank is the most desirable.

2.2.3 Total Construction Costs

Although site layout has not been completed, a preliminary opinion of probable construction cost (OPCC) has been provided to give a rudimentary overall estimate of the total project construction cost. The OPCC is based on providing a new drive, pipe from the tank to distribution, fencing, existing tank demolition, site electrical, instrumentation, and various other sitework. A 20% contingency was added to this portion of the work. A summary of the preliminary OPCC for 0.5 and 0.75 MG new composite tanks is shown in Table 2-8.

Table 2-8 Preliminary OPCC

0.5 MG 0.75 MG

Elevated Tank (Composite) $1,554,000 $1,843,000

General Requirements 12% $186,000 $221,000

Sitework $87,000 $93,000

Piping $195,000 $216,000

Electrical & Instrumentation

$81,000 $81,000

Existing Tank Demolition $125,000 $125,000

Tank Add-ons $99,000 $99,000

Subtotal $2,327,000 $2,678,000

Contingency 20% $465,000 $536,000

Total $2,792,000 $3,214,000

Other costs included and assumptions:

• Douglas County EMS equipment relocation; cost of monopole for cellular providers has not been included.


BLACK & VEATCH | Recommendations 9

• Completion of the lower level of the tank column for storage/maintenance, including overhead door, windows, and HVAC provisions.

• Connection to the existing 12” distribution line in the southwest corner of the site.

• Replacement of 12” transite pipe along the west side of the site.

• Connection to storm sewer for the tank overflow.

• Connection to sanitary sewer for the storage area/maintenance drain.

• PAX mixer.

• Minor park improvements including new pedestrian trail.

3.0 Recommendations

3.1 TANK ALTERNATIVE The LCCA shows that the capital cost of the multi-column tank is the lowest, although it requires high maintenance costs. Because Caldwell is the only manufacturer that is qualified to manufacturer this style of tank, there is added risk in choosing this tank alternative due to the lack of competition. The difference in net present value between both a 0.5 and a 0.75 MG composite tank and spheroid tank is negligible. A spheroid tank requires higher maintenance costs and does not have the added benefit of the secondary uses including storage.

The alternative selection matrices resulted in the composite tank alternative receiving the best score in both volumes. Compared to other tank alternatives, composite tanks have the best provisions for mounting cellular antennae. The composite tank alternative ensures the most competitive bidding market, allows for various secondary uses, and is the least exposed to risk of future increases in regulation of maintenance procedures. Based on this information, a composite tank is recommended, regardless of the size selected.

3.2 TANK SIZE As indicated in Tables 2-3 and 2-5, the net present value in cost per gallon for the 0.5 MG and 0.75 MG composite tank alternatives is $3.62 and $2.91, respectively. Based on capital costs, the City could pay 19% more and gain 50% more volume if a 0.75 MG tank is chosen. The water model will be analyzed based on demand scenarios and surrounding infrastructure. This analysis will further indicate advantages of increasing tank volume. Based on cost efficiency, a tank capacity of 0.75 MG is recommended.


A-1

Appendix A. Figures

FIGURE 1 SPHEROID

FIGURE 2 HYDROPILLAR

FIGURE 3 COMPOSITE


B-1

Appendix B. Estimating Guide for Surface Areas of Water Tanks


C-1

Appendix C. Fabricator Quotations

CB&I Storage Tank Solutions™ 14105 S. Route 59 Plainfield, IL 60544

USA Tel: 815-439-4008 Fax: 815-439-3130

[email protected]

CB&I Storage Tank Solutions™

September 3, 2019 To: Steven Nagrich

Black &Veatch 8400 Ward Parkway Kansas City, MO 64114

RE: Elevated Budgetary Estimate

Lawrence, KS 500 MG Elevated Tank Budgets

Dear Eric:

Per your request, I have developed preliminary budget pricing for the elevated water storage tank opportunity located Lawrence. The present-day budgetary estimate for the tank capacity and height as listed below is as follows: 500 MG x 132’ TCL Waterspheroid® - $1,700,000 (37.5’ Head Range) 500 MG x 132’ TCL Composite (CET) - $2,000,000 (37.5’ Head Range) 500 MG x 132’ TCL Hydropillar® - $2,100,000 (38’ Head Range) Budget Pricing Includes: Site/Project Specific Items Not Included: AWWA D100-11 Tank Cathodic Protection Shop Prime Paint (as noted below) Telemetry Field Finish Paint (as noted below) Piping Outside the Foundation Spread Footing Foundation Altitude Valves Basic Electrical Valve Vault Anchor Bolts Site Work Ladders w/ safety climb Prevailing Wages CS Inlet (304L SS - CET) Pile / Pier Foundation (< 4000 psf soil) CS Overflow to Grade (304L SS - CET) Containment for Blasting and Painting Block Lettering

In reviewing the budget, please note that the estimated cost for the tank foundation is based on 4000 psf allowable bearing pressure and a shallow spread footing design. We have not accounted for any special design considerations due to seismic and wind conditions that would be specific for the site. The actual foundation design will depend upon the findings of the GeoTech for the site being considered for the tank. I have included a $100,000 budget for the Electrical Work on this project based on recent projects, which require SCADA systems with the Tank. The paint system provided in this budget includes a polyamidoamine epoxy interior coating system and a fluoropolymer exterior coating system. Shop prime coatings for the interior and exterior portions of the tank shall be compatible with the appropriate field coating system.

2


The global steel market has stabilized in recent months. However, due to the fluctuations in the market conditions, it is difficult to predict the stability of the market over the next several months. As a result the budget estimate offered herein is based on present day pricing and availability of materials. Please be sure to add for any site or project specific items that I have excluded above. If you should have any questions please contact me at (815) 439-4008. As requested, I have also attached a life cycle cost analysis based on the three (3) tanks styles budgeted for this project. The life cycle analysis is done for both the 500 MG and the 750 MG tanks sizes. Please note that life cycle analysis does not include for any maintenance associated with the concrete pedestal furnished with the composite tank. In some cases, the Owner may wish to have the concrete support sealed to protect the concrete from the environment. In those cases, the life cycle cost for the composite tank will be increased from that shown in the attached analysis. Thank you once again for your interest in CB&I Storage Tank Solutions. Very Truly Yours, CB&I

Jack Currie Jack Currie, PE Business Development Manager

CB&I Storage Tank Solutions™ 14105 S. Route 59 Plainfield, IL 60544

USA Tel: 815-439-4008 Fax: 815-439-3130

[email protected]


September 3, 2019 To: Steven Nagrich

Black &Veatch 8400 Ward Parkway Kansas City, MO 64114

RE: Elevated Budgetary Estimate

Lawrence, KS 750 MG Elevated Tank Budgets

Dear Eric:

Per your request, I have developed preliminary budget pricing for the elevated water storage tank opportunity located Lawrence. The present day budgetary estimate for the tank capacity and height as listed below is as follows: 750 MG x 132’ TCL Waterspheroid® - $2,000,000 (40’ Head Range) 750 MG x 132’ TCL Composite (CET) - $2,200,000 (40’ Head Range) 750 MG x 132’ TCL Hydropillar® - $2,400,000 (40’ Head Range) Budget Pricing Includes: Site/Project Specific Items Not Included: AWWA D100-11 Tank Cathodic Protection Shop Prime Paint (as noted below) Telemetry Field Finish Paint (as noted below) Piping Outside the Foundation Spread Footing Foundation Altitude Valves Basic Electrical Valve Vault Anchor Bolts Site Work Ladders w/ safety climb Prevailing Wages CS Inlet (304L SS - CET) Pile / Pier Foundation (< 4000 psf soil) CS Overflow to Grade (304L SS - CET) Containment for Blasting and Painting Block Lettering

In reviewing the budget, please note that the estimated cost for the tank foundation is based on 4000 psf allowable bearing pressure and a shallow spread footing design. We have not accounted for any special design considerations due to seismic and wind conditions that would be specific for the site. The actual foundation design will depend upon the findings of the GeoTech for the site being considered for the tank. I have included a $100,000 budget for the Electrical Work on this project based on recent projects, which require SCADA systems with the Tank. The paint system provided in this budget includes a polyamidoamine epoxy interior coating system and a fluoropolymer exterior coating system. Shop prime coatings for the interior and exterior portions of the tank shall be compatible with the appropriate field coating system.

2


The global steel market has stabilized in recent months. However, due to the fluctuations in the market conditions, it is difficult to predict the stability of the market over the next several months. As a result the budget estimate offered herein is based on present day pricing and availability of materials. Please be sure to add for any site or project specific items that I have excluded above. If you should have any questions please contact me at (815) 439-4008. As requested, I have also attached a life cycle cost analysis based on the three (3) tanks styles budgeted for this project. The life cycle analysis is done for both the 500 MG and the 750 MG tanks sizes. Please note that life cycle analysis does not include for any maintenance associated with the concrete pedestal furnished with the composite tank. In some cases, the Owner may wish to have the concrete support sealed to protect the concrete from the environment. In those cases, the life cycle cost for the composite tank will be increased from that shown in the attached analysis. Thank you once again for your interest in CB&I Storage Tank Solutions. Very Truly Yours, CB&I

Jack Currie Jack Currie, PE Business Development Manager

Elevated Water Storage Tank

Landmark Structures - Fort Worth Texas, USA

Budget Pricing 9/9/2019

Landmark is pleased to provide the following budget pricing for the elevated water storage tank and related

work for the following project:

Lawrence, KS – Stratford Tank


Design Parameters

Height to HWL 132 Feet

Head Range Standard

Design & Load Basis AWWA D100

Scope of Work and Budget Price

500,000 gallon Spheroid Elevated Tank $ 1,400,000

750,000 gallon Spheroid Elevated Tank $ 1,650,000

Foundation – Shallow foundation at 6 ft. depth assumed

Appurtenances - standard requirements per AWWA D-100

Carbon steel ladders and access platforms

Steel plate mandoor (Spheroids only)

Carbon steel inlet/outlet and overflow piping

Steel tank coatings – 2-coat epoxy interior, 3-coat epoxy polyurethane exterior

Disinfection and commissioning

Suitable access from public road within 50 feet

Allowances

The following have been included in the above budget; however they may need to be modified per the specific requirements of the project and the site conditions.

Basic yard piping for single inlet/outlet water main (common range is $15k to $200k+) $ 15,000

Basic chain link fencing and single gate (common range is $10k to $25k) $ 10,000

Basic electrical (common range is $25k to $150k+) $ 30,000


Landmark Structures - Fort Worth Texas, USA

Ancillary Works Not Included in Budget

Soil conditions requiring mat or deep foundations (Commonly adds $50k to $300k)

Electrical, controls and power service, cathodic protection (Commonly adds $15k to $150k)

Site works – grading, fencing, landscaping, roadwork, water and drainage piping

Testing and inspection – concrete, welding, coatings

Control valves and related piping, tank mixing systems, pipe insulation

Building and FAA permits

Control room within pedestal c/w heating & lighting

Allowances for small site constraints or containment of coatings operations

Prevailing wage rates (Commonly adds $50k to $150k)

Project:

Lawrence, KS ‐ Stratford Tank

0.50 MG Composite Elevated Tank

Notes:

1. Budgets provided at pre‐design stage are typically based on an incomplete understanding of all project details.

2. Budget refinements are required as additional project information and details become available.

3. Note the list of options and exclusions. Budget should be adjusted accordingly.

4. Budget good for 12 months, please contact us to update if needed.

Composite Elevated Tank 1,300,000$

Inclusions:

The following have been included in the above budget:

Design Standards and Codes

AWWA D107 ‐ Composite Elevated Tanks for Water Storage included

CET Configuration and Elevations

Total Storage Volume 500,000 gallons included

Height to HWL 132.00 feet included

Head Range 35.00 feet included

Foundation

Shallow raft / ring at 8 ft depth (4000 psf allowable soil bearing) included

Concrete Support Structure

AWWA D107 standard support wall 24.00 feet (dia) included

Architectural concrete with exterior rustication pattern included

Steel Tank

AWWA D107 standard 53.00 feet (dia) included

Steel Tank Coatings

Interior ‐ zinc‐rich urethane + single coat 100% solids epoxy included

Exterior ‐ zinc‐rich urethane + epoxy + aliphatic urethane included

Disinfection included

Piping and Mechanical

Inlet / Outlet (single) ‐ Type 304L SS 12 inch included

Overflow with Flap Valve ‐ Type 304L 8 inch included

Page 1 of 4 KS 0221 - Lawrence Budget Date: 9/9/2019

Accessories

AWWA D‐107 (Section 8) standard accessories included

Galvanized ladders and rest seats included

Safety climb system with 3 pc. harness / lanyard included

Overhead Vehicle Door included

Ventilation ‐ steel tank and concrete pedestal included

Steel tank roof handrail included

Steel tank floor manhole and 2 pc. roof hatch included

Slab on grade within pedestal included

Electrical and Lighting

AWWA D‐107 (Section 8) requirements 25,000$ allowance included

Site Work

Administrative

Bonds and Insurance included

Commissioning included

Exclusions and Options:The following have not been included in the above budget:

Probable requirements for this project are highlighted

Budget cost range (typical) for the following items. Low High

Foundation

Shallow foundation ‐ additional due to lower allowable bearing 10,000$ 50,000$ not included

Deep foundations 50,000$ 150,000$ not included


Special Configuration / Design / Exterior Aesthetic Treatment 25,000$ 200,000$ not included

Steel Tank

Special Configuration / Design / Shape 25,000$ 250,000$ not included

Corrosion Allowance (not recommended) 10,000$ 25,000$ not included

Steel Tank Coatings

Exterior ‐ zinc‐rich urethane + aliphatic urethane + fluorourethane not included

Interior ‐ 100% solids aromatic urethane (not recommended) 20,000$ 25,000$ not included

Logo and special colors 10,000$ 50,000$ not included

Environmental controls during coatings operations 10,000$ 75,000$ not included



Inlet / Outlet control valve and bypass not included

Tank Drain ‐ inlet / overflow crossover not included

Separate inlet and outlet plus associated pipe and valves 25,000$ 75,000$ not included

Control Valves & related piping 5,000$ 50,000$ not included

Large diameter inlet, outlet, overflow or valve chamber 5,000$ 20,000$ not included

High pressure pipe rating (exceed AWWA D107 requirement) 5,000$ 20,000$ not included

Specialty pipe materials ‐ Type 316 SS 5,000$ 20,000$ not included

Specialty pipe coatings ‐ Fusion bonded epoxy 5,000$ 20,000$ not included

Pipe Insulation & Jacketing 5,000$ 15,000$ not included

Accessories

Landings ‐ intermediate (in place of rest seats) 5,000$ 10,000$ not included

Specialty ladder and landing materials (aluminum / stainless) 5,000$ 10,000$ not included

Pedestal access ‐ double mandoor only (4,000)$ (10,000)$ not included

Overhead Vehicle Door ‐ oversized 5,000$ 15,000$ not included

Control room within pedestal c/w heating & lighting 10,000$ 50,000$ not included

Rescue equipment 10,000$ 20,000$ not included

Tank Mixing System 20,000$ 75,000$ not included


Electrical service (typically Owner provided) 10,000$ 50,000$ not included

Electrical and Lighting (beyond AWWA D107 requirements) 10,000$ 150,000$ not included

Obstruction lighting 10,000$ 25,000$ not included

Site lighting 10,000$ 25,000$ not included

Logo lighting 20,000$ 40,000$ not included

Controls and Instrumentation 15,000$ 150,000$ not included

Security and Surveillance 15,000$ 75,000$ not included

Communications

Antenna provisions ‐ roof mounted cellular / microwave 15,000$ 50,000$ not included

Antenna provisions ‐ pedestal mounted cellular 10,000$ 20,000$ not included


Site Work

Yard piping ‐ minor not included

Site grading and access road ‐ minor not included

Fencing ‐ chain link not included

Watermain, valves and valve chambers (beyond budgeted allowance) ‐$ 100,000$ not included

Overflow catch basin and associated yard piping 10,000$ 30,000$ not included

Storm water piping and drainage structures 10,000$ 50,000$ not included

Site grading, retainage ponds, etc. 10,000$ 100,000$ not included

Sanitary piping 10,000$ 20,000$ not included

Access road and parking ‐ aggregate 20,000$ 40,000$ not included

Access road and parking ‐ concrete or asphalt 30,000$ 60,000$ not included

Landscaping 10,000$ 50,000$ not included

Fencing ‐ ornamental 30,000$ 100,000$ not included

Clearing ‐$ 25,000$ not included

Demolition of existing tank 15,000$ 50,000$ not included

Interior Finishes

Structural intermediate floor, with stair access and lighting 50,000$ 75,000$ not included

Ceiling in Pedestal 10,000$ 20,000$ not included

Coatings ‐ floor, walls, masonry 2,500$ 20,000$ not included

Testing and Inspection ‐ 3rd party

Soils / Foundation 1,000$ 10,000$ not included

Concrete 3,000$ 5,000$ not included

Welding 3,000$ 5,000$ not included

Coatings 3,000$ 10,000$ not included

Administrative

Prevailing wage rates ‐$ ‐$ not included

Local labor agreements ‐$ ‐$ not included

Permits and related fees ‐$ ‐$ not included

Other

Schedule compression ‐$ ‐$ not included

Site constraints and noise restrictions ‐$ ‐$ not included

Contingencies ‐$ ‐$ not included


Project:

Lawrence, KS ‐ Stratford Tank

0.75 MG Composite Elevated Tank

Notes:

1. Budgets provided at pre‐design stage are typically based on an incomplete understanding of all project details.

2. Budget refinements are required as additional project information and details become available.

3. Note the list of options and exclusions. Budget should be adjusted accordingly.

4. Budget good for 12 months, please contact us to update if needed.

Composite Elevated Tank 1,500,000$

Inclusions:

The following have been included in the above budget:

Design Standards and Codes

AWWA D107 ‐ Composite Elevated Tanks for Water Storage included

CET Configuration and Elevations

Total Storage Volume 750,000 gallons included

Height to HWL 132.00 feet included

Head Range 40.00 feet included

Foundation

Shallow raft / ring at 8 ft depth (4000 psf allowable soil bearing) included


AWWA D107 standard support wall 28.00 feet (dia) included

Architectural concrete with exterior rustication pattern included

Steel Tank

AWWA D107 standard 62.00 feet (dia) included

Steel Tank Coatings

Interior ‐ zinc‐rich urethane + single coat 100% solids epoxy included

Exterior ‐ zinc‐rich urethane + epoxy + aliphatic urethane included

Disinfection included


Inlet / Outlet (single) ‐ Type 304L SS 12 inch included

Overflow with Flap Valve ‐ Type 304L 8 inch included


Accessories

AWWA D‐107 (Section 8) standard accessories included

Galvanized ladders and rest seats included

Safety climb system with 3 pc. harness / lanyard included

Overhead Vehicle Door included

Ventilation ‐ steel tank and concrete pedestal included

Steel tank roof handrail included

Steel tank floor manhole and 2 pc. roof hatch included

Slab on grade within pedestal included


AWWA D‐107 (Section 8) requirements 25,000$ allowance included

Site Work

Administrative

Bonds and Insurance included

Commissioning included

Exclusions and Options:The following have not been included in the above budget:

Probable requirements for this project are highlighted

Budget cost range (typical) for the following items. Low High

Foundation

Shallow foundation ‐ additional due to lower allowable bearing 10,000$ 50,000$ not included

Deep foundations 50,000$ 150,000$ not included


Special Configuration / Design / Exterior Aesthetic Treatment 25,000$ 200,000$ not included

Steel Tank

Special Configuration / Design / Shape 25,000$ 250,000$ not included

Corrosion Allowance (not recommended) 10,000$ 25,000$ not included

Steel Tank Coatings

Exterior ‐ zinc‐rich urethane + aliphatic urethane + fluorourethane not included

Interior ‐ 100% solids aromatic urethane (not recommended) 20,000$ 25,000$ not included

Logo and special colors 10,000$ 50,000$ not included

Environmental controls during coatings operations 10,000$ 75,000$ not included



Inlet / Outlet control valve and bypass not included

Tank Drain ‐ inlet / overflow crossover not included

Separate inlet and outlet plus associated pipe and valves 25,000$ 75,000$ not included

Control Valves & related piping 5,000$ 50,000$ not included

Large diameter inlet, outlet, overflow or valve chamber 5,000$ 20,000$ not included

High pressure pipe rating (exceed AWWA D107 requirement) 5,000$ 20,000$ not included

Specialty pipe materials ‐ Type 316 SS 5,000$ 20,000$ not included

Specialty pipe coatings ‐ Fusion bonded epoxy 5,000$ 20,000$ not included

Pipe Insulation & Jacketing 5,000$ 15,000$ not included

Accessories

Landings ‐ intermediate (in place of rest seats) 5,000$ 10,000$ not included

Specialty ladder and landing materials (aluminum / stainless) 5,000$ 10,000$ not included

Pedestal access ‐ double mandoor only (4,000)$ (10,000)$ not included

Overhead Vehicle Door ‐ oversized 5,000$ 15,000$ not included

Control room within pedestal c/w heating & lighting 10,000$ 50,000$ not included

Rescue equipment 10,000$ 20,000$ not included

Tank Mixing System 20,000$ 75,000$ not included


Electrical service (typically Owner provided) 10,000$ 50,000$ not included

Electrical and Lighting (beyond AWWA D107 requirements) 10,000$ 150,000$ not included

Obstruction lighting 10,000$ 25,000$ not included

Site lighting 10,000$ 25,000$ not included

Logo lighting 20,000$ 40,000$ not included

Controls and Instrumentation 15,000$ 150,000$ not included

Security and Surveillance 15,000$ 75,000$ not included

Communications

Antenna provisions ‐ roof mounted cellular / microwave 15,000$ 50,000$ not included

Antenna provisions ‐ pedestal mounted cellular 10,000$ 20,000$ not included


Site Work

Yard piping ‐ minor not included

Site grading and access road ‐ minor not included

Fencing ‐ chain link not included

Watermain, valves and valve chambers (beyond budgeted allowance) ‐$ 100,000$ not included

Overflow catch basin and associated yard piping 10,000$ 30,000$ not included

Storm water piping and drainage structures 10,000$ 50,000$ not included

Site grading, retainage ponds, etc. 10,000$ 100,000$ not included

Sanitary piping 10,000$ 20,000$ not included

Access road and parking ‐ aggregate 20,000$ 40,000$ not included

Access road and parking ‐ concrete or asphalt 30,000$ 60,000$ not included

Landscaping 10,000$ 50,000$ not included

Fencing ‐ ornamental 30,000$ 100,000$ not included

Clearing ‐$ 25,000$ not included

Demolition of existing tank 15,000$ 50,000$ not included

Interior Finishes

Structural intermediate floor, with stair access and lighting 50,000$ 75,000$ not included

Ceiling in Pedestal 15,000$ 25,000$ not included

Coatings ‐ floor, walls, masonry 2,500$ 20,000$ not included

Testing and Inspection ‐ 3rd party

Soils / Foundation 1,000$ 10,000$ not included

Concrete 3,000$ 5,000$ not included

Welding 3,000$ 5,000$ not included

Coatings 3,000$ 10,000$ not included

Administrative

Prevailing wage rates ‐$ ‐$ not included

Local labor agreements ‐$ ‐$ not included

Permits and related fees ‐$ ‐$ not included

Other

Schedule compression ‐$ ‐$ not included

Site constraints and noise restrictions ‐$ ‐$ not included

Contingencies ‐$ ‐$ not included


1

Nagrich, Steven N.

From: Carter Spoelstra <[email protected]>

Sent: Thursday, September 05, 2019 6:23 PM

To: Nagrich, Steven N.

Cc: Carter Spoelstra

Subject: RE: Lawrence - Stratford Water Tower Replacement

Attachments: CTI Tank Brochure (email).pdf; CTI CET Brochure (email).pdf; Lawrence-KS NPV for 20,

40, 60, & 120 years - 500M TB, PED, CET, & FLC.pdf; Lawrence-KS NPV for 20, 40, 60, &

120 years - 750M TB, PED, CET, & FLC.pdf

Steve,

Thank you again for contacting Caldwell Tanks for your budgetary needs. Please see budget pricing below

regarding the planned Elevated Water Storage Tank project for the City of Lawrence, KS.

The following budget pricing includes a shallow foundation system, tank fabricated/erected, shop primed and

field painted:

500,000 Gallon Multi-Column Elevated Tank with a high water elevation of 132.0’.

Designed per AWWA D100 with standard accessories.

The tank diameter will be 50.0' with an operating head range of 37.00'

60'' diameter wet riser and 6 peripheral support legs with a top of foundation anchor bolt circle of

approximately 63.42' diameter.

Budget Price: $1,115,000

500,000 Gallon Pedesphere Tank with a high water elevation of 132.0’.



10'-0 diameter support shaft and a top of foundation anchor bolt circle of approximately 27'-6 diameter.


500,000 Gallon Composite Elevated Tank with a high water elevation of 132.0’.



30'-0 diameter concrete support shaft.


500,000 Gallon Fluted Column Elevated Tank with a high water elevation of 132.0’.



30'-0 diameter steel support column.


750,000 Gallon Multi-Column Elevated Tank with a high water elevation of 132.0’.



2

60'' diameter wet riser and 8 peripheral support legs with a top of foundation anchor bolt circle of

approximately 60.00' diameter.


750,000 Gallon Pedesphere Tank with a high water elevation of 132.0’.



11'-8 diameter support shaft and a top of foundation anchor bolt circle of approximately 30'-0 diameter.


750,000 Gallon Composite Elevated Tank with a high water elevation of 132.0’.



36'-0 diameter concrete support shaft.


750,000 Gallon Fluted Column Elevated Tank with a high water elevation of 132.0’.



42'-0 diameter steel support column.


The big unknown on budgets is always the foundation. The above is based on a shallow spread footing

without rock excavation. Deep pile foundation system pricing can vary greatly depending on the specific pile

type that is utilized as well as the required depth. The range would likely be an additional $150,000 -

$300,000.

Please add money to cover any additional scope such as: high prevailing wages, deep foundation system, valve

vaults, altitude valves, yard piping, site work, fencing, electrical, SCADA, cellular antenna provisions, cathodic

protection, containment (shrouding) during the blasting and painting operation, Fluorourethane paint, mixing

systems, dewatering, rock excavation, etc. Budget price quotes are good for 60 calendar days.

Caldwell will be happy to assist your soil lab with the writing of foundation recommendations by providing all

tank and foundation loads. The analysis also includes wind and seismic considerations. If interested, please

provide me with the tank location (Longitude and Latitude), tank capacity, style, and height as measured from

grade level to the high water elevation and we can provide our soil investigation requirements along with the

tank and foundation loads

Please also find the attached life cycle, net present value analysis that was requested for each capacity of tank.

I also wanted to point out that Caldwell Tanks, Inc. has developed a forming system specifically for the

construction of composite elevated tanks that utilizes locking rigid steel form panels. Our system is made

up of three rings of 4’ form panels that provides a 12’ high form system, however, only 4’ of concrete is

poured per lift therefore eliminating the use of through wall form ties, temporary bulkheads, and drop

chutes or tremies. This allows us to blend two or more concrete trucks when pumping concrete into place,

minimizing pour lines and concrete shading. Our form system provides a well-constructed shaft in full

accordance with the tolerances required in the ACI 371R Guide for the Analysis, Design and Construction of

Concrete-Pedestal Water Towers and AWWA D107. Certain tank contractors push their specifications that

3

attempt to restrict means and methods so they can limit competition in the marketplace by placing a form

height minimum of 6’-0. These requirements do not affect the quality or aesthetics of the concrete pedestal

and ultimately make the water rate-payers fund the premium. Caldwell’s CET’s reflect an attractive

architectural concrete product that is just as good as, or better, than our competitors. Our concrete

pedestal has a uniform consistent appearance with the absence of shading and discoloration, no patched

form tie holes and no grout leakage streaks. We had previously sent John Bertrand a CET binder back in

2014 when we first discussed this project, however, I would be happy to send you our CET binder with

supporting material for your review that goes into great detail of our forming system and CET construction

methods if John no longer has it.

Caldwell’s main focus is safety in the work place and particularly construction sites. We strongly suggest the

wording below to be added to your standard tank specifications to ensure the Owner that only safe and

qualified tank contractors are considered for your project.

“As providing a safe work environment is critical for this project, other contractors, and the community, to

be approved to bid on this project, given the complexity, and risk associated with the work, all tank

contractors are required to have an Experience Modification Rate (EMR) below 0.65 a Total Recordable

Incident Rate (TRIR) below 2.5 for the last three (3) years. Bidders are required to verify the above

requirement by providing with their proposal a statement from their insurance carrier confirming the EMR

requirement, and their last three (3) years of OSHA 300 Logs to confirm the TRIR requirement.”

Also, for standard specifications and background drawings, please

visit: http://www.caldwellwatertanks.com/water-tank-specs-drawings.html

Once you have determined the tank site, please file your request for the FAA permit. The permitting process

can take up to six months and can delay the project if the permit is not obtained by the time filed construction

starts. Here is the link to the FAA website: https://oeaaa.faa.gov/oeaaa/external/portal.jsp

Please feel free to contact me at any time if you have questions or need additional information.

Have a great day,

Carter Spoelstra | Sales Manager - Water

Caldwell Tanks, Inc | 2570 106th Street | Suite C | Urbandale, IA 50322 o: (502) 964-3361 | c: (515) 238-8206 | f: (502) 966-8732 _________________________________________________________

From: Nagrich, Steven N. <[email protected]>

Sent: Wednesday, August 28, 2019 11:08 AM

To: Carter Spoelstra <[email protected]>

Subject: Lawrence - Stratford Water Tower Replacement

Carter,


D-1

Appendix D. Life-Cycle Cost Analysis Calculations


D-2

ELEVATED TANK LIFE COST COMPARATIVE ANALYSIS CALCULATIONS – 0.5 MG

Project Location: Lawrence, KS - 0.5 MG

Life Cycle Evaluation Period (Yrs): 60 30YR Interest Rate (%) 3.6

Contingency (Tank Capital Cost Only): 10% Inflation Rate (%) 1.8

Discount Rate (%)* 1.5

Coatings Schedule Coating Life (Yrs)

Original Repaint

Exterior 20 20

Interior Wet 20 20

Interior Dry 20 20

Tank Alternative Composite Spheroid Hydropillar Multi-Column

Capacity (gallons) 500,000

Height to HWL (ft) 132

Head Range (ft) 37.5

Elevated Tank Capital Cost $1,553,750 $1,664,667 $2,200,000 $1,226,500

Coating Area (sf)

Exterior 9,410 12,750 19,300 19,600

Interior Wet 12,360 9,000 12,000 10,000

Interior Dry - 5,500 17,500 -

Total 21,770 27,250 48,800 29,600

Coating Cost ($/sf) Repaint Repaint Repaint Repaint

Exterior $14.00 $15.00 $14.00 $14.00

Interior Wet $10.00 $10.00 $10.00 $10.00

Interior Dry - $3.50 $8.00 -

Net Present Value Cost Summary

Composite Spheroid Hydropillar Multi-Column


D-3

Future Coatings

Exterior $97,813 $141,997 $200,616 $203,734

Interior Wet $159,905 $116,436 $155,248 $129,373

Interior Dry - $24,904 $181,123 -

Total Coatings $257,718 $283,338 $536,986 $333,107

Total Cost (NPV) $1,811,468 $1,948,004 $2,736,986 $1,559,607

Unit Cost ($/Gallon)

Tank $3.11 $3.33 $4.40 $2.45

Maint $0.52 $0.57 $1.07 $0.67

Total $3.62 $3.90 $5.47 $3.12

*Discount rate is "Real Interest Rate" based on 30-yr interest rate from 2015 Federal OMB report. This is the nominal interest rate less the inflation premium.


D-4

Base LCCA Calculations - 0.5 MG

Tank Type Composite Spheroid Fluted Column Multi-Column

Exterior

Year Repaint

20 x $97,813 $141,997 $200,616 $203,734

Total $97,813 $141,997 $200,616 $203,734

Interior Wet

Year Repaint

20 x $91,769 $66,822 $89,096 $74,247

40 x $68,136 $49,614 $66,151 $55,126

Total $159,905 $116,436 $155,248 $129,373

Interior Dry

Year Repaint

20 x $14,293 $103,946

40 x $10,612 $77,177

Total $24,904 $181,123

Total NPV $257,718 $283,338 $536,986 $333,107


D-5

ELEVATED TANK LIFE COST COMPARATIVE ANALYSIS CALCULATIONS - 0.75 MG

Project Location: Lawrence, KS - 0.75 MG

Life Cycle Evaluation Period (Yrs): 60 30YR Interest Rate (%) 3.6

Contingency (Tank Capital Cost Only): 10% Inflation Rate (%) 1.8

Discount Rate (%)* 1.5

Coatings Schedule Coating Life (Yrs)

Original Repaint

Exterior 20 20

Interior Wet 20 20

Interior Dry 20 20

Tank Alternative Composite Spheroid Hydropillar Multi-Column

Capacity (gallons) 750,000

Height to HWL (ft) 132

Head Range (ft) 40

Elevated Tank Capital Cost $1,843,000 $2,048,000 $2,585,000 $1,595,000

Coating Area (sf)

Exterior 12,270 16,500 27,675 29,100

Interior Wet 15,715 11,750 15,900 13,600

Interior Dry - 7,100 26,750 -

Total 27,985 35,350 70,325 42,700

Coating Cost ($/sf) Repaint Repaint Repaint Repaint

Exterior $14.00 $15.00 $14.00 $14.00

Interior Wet $10.00 $10.00 $10.00 $10.00

Interior Dry - $3.50 $8.00 -

Net Present Value Cost Summary

Composite Spheroid Hydropillar Multi-Column

Future Coatings


D-6

Exterior $130,000 $187,000 $293,000 $309,000

Interior Wet $209,000 $156,000 $211,000 $181,000

Interior Dry - $33,000 $285,000 -

Total Coatings $339,000 $376,000 $789,000 $490,000

Total Cost (NPV) $2,182,000 $2,424,000 $3,374,000 $2,085,000

Unit Cost ($/Gallon)

Tank $2.46 $2.73 $3.45 $2.13

Maint $0.45 $0.50 $1.05 $0.65

Total $2.91 $3.23 $4.50 $2.78

*Discount rate is "Real Interest Rate" based on 30-yr interest rate from 2015 Federal OMB report. This is the nominal interest rate less the inflation premium.


D-7

Base LCCA Calculations - 0.75 MG

Tank Type Composite Spheroid Fluted Column Multi-Column

Exterior

Year Repaint

20 x $130,000 $187,000 $293,000 $309,000

Total $130,000 $187,000 $293,000 $309,000

Interior Wet

Year Repaint

20 x $119,000 $89,000 $120,000 $103,000

40 x $90,000 $67,000 $91,000 $78,000

Total $209,000 $156,000 $211,000 $181,000

Interior Dry

Year Repaint

20 x $19,000 $162,000

40 x $14,000 $123,000

Total $33,000 $285,000

Total NPV $339,000 $376,000 $789,000 $490,000

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STRATFORD WATER TOWER REPLACEMENT

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