HomeMy WebLinkAboutMayo Proposed Permanent Water Solution_20161027Permanent Water Supply Proposal to DEQ - Mayo
Mayo Steam Station
Person County
22 eligible households
Duke Energy has evaluated the feasibility and costs of providing a permanent replacement
water supply to eligible households, as required under G.S. 130A-309.21 1 (cl) of House Bill
630. Households were designated as "eligible" if any portion of a parcel of land crossed the
mile compliance buffer described in HB630 and if the household currently utilized well water or
bottled water (under Duke Energy's bottled water program) as the drinking water source.
Although HB630 indicates that households are to be covered, Duke Energy has included one
(1) business as an eligible location. Undeveloped parcels were identified but were not
considered "eligible" because groundwater wells are not currently utilized as a drinking source.
Dewberry, a respected outside vendor, conducted the Potable Water Programmatic Evaluation
(attached); the evaluation consisted of a survey of eligible households and a preliminary
engineering evaluation, cost estimate and schedule. Dewberry's report, for the most part,
assumes one metered connection per parcel; therefore, multiple homes may be serviced by one
connection. The total count in this proposed plan includes all final connections.
The City of Roxboro indicated that they had water quality concerns with providing water to any
of the eligible households within the'/2 mile boundary due to low water demand and the
residence time of the water in the pipeline, but they would be open to providing water service to
the eight (8) households south of the Steam Station. They indicated that it would not be feasible
to provide potable water to the 14 households north of the station, including those in Virginia.
The closest existing City of Roxboro municipal line is located near the intersection of Boston
Rd/Hwy 501 and Old US Highway 501. The closest household is approximately 3,000 feet (0.6
miles) from the current line. The furthest household is approximately 5,300 feet (1 mile) from
the current line.
The estimated cost to provide a municipal line to the eight (8) households south of the station is
$1,200,000, or $150,000 per household. The Dewberry evaluation includes a project schedule
based on their past experience installing public water systems. The preliminary project
schedule indicates that a permanent water supply could be available through the City of
Roxboro by August 2018.
Based on the results of the Dewberry evaluation, the concerns raised by the City of Roxboro on
water quality, and the overall construction costs, Duke Energy proposes that all 22 households
be offered a water treatment system.
The performance standard for the public water system is the Federal MCLs. The performance
standard for the water treatment system is also the Federal MCLs except for those constituents
identified in 2015 as having potential health concerns: arsenic, hexavalent chromium, cobalt,
iron, lead, manganese, sulfate and vanadium. For these constituents, the performance
(� DUKE
�, ENERGY
Permanent Water Supply Proposal to DEQ - Mayo
standard will be either one-half of the MCL or the appropriate state standard, whichever is more
protective.
Duke Energy is currently evaluating an ion filtration treatment system; this system has been
successfully installed in other parts of the state, and initial results show it performs well in
reducing vanadium and hexavalent chromium, among other constituents. The costs shown
below are for a conceptual ion filtration treatment system. The final water treatment system will
be based upon the results of field studies.
Duke Energy has made efforts to identify all eligible households, but it is anticipated that a
nominal number of additional households will be identified during the initial outreach effort
conducted upon approved of this plan by NCDEQ. If the final number of households results in a
conclusion different than those stated in this preliminary plan, Duke Energy will revise and
submit the new plan to NCDEQ for evaluation and approval. Well owners will be responsible for
making the decision for their parcels. Only households within the'/2 mile boundary and served
by well water at the time of the submittal of this plan will be eligible for a permanent water
supply as part of H13630.
(' DUKE
ENERGY
Permanent Water Supply Proposal to DEQ - Mayo
Ion Filtration Water
Treatment System
Total Number Recommended
22
Water Quality Criteria
Meets applicable water quality
Yes
standards (Federal MCLs)
Completion Schedule
Estimated completion date
12/2017
Contingency factors
N/A
Operational Considerations
Required acceptance level to
achieve consistent water N/A
quality and supply
Required acceptance level to i
achieve targeted cost per N/A
eligible household
(<$35k/household) _
Location of households
relative to existing municipal N/A
water lines
Other considerations
Costs
Total Installation Costs
$154,000 - $220,000
Approximate cost per eligible
$7,000 - $10,000
household
Annual Maintenance Costs
$11,000 - $44,000
$500 - $2,000
Maintenance cost per
household annually
Non -Duke Costs
Total estimated water bills
N/A
monthly
Estimated water bills monthly
N/A
per household
Ongoing municipality costs for
maintenance and flushing due N/A
to low-flow/low-usage
Total Costs
(Duke and Non -Duke)
Total estimated cost for all
eligible neighbors over 10 $264,000 - $660,000
I_
years
Total estimated cost for each
eligible neighbors over 10 $12,000 - $30,000
years
DUKE
ENERGY:.
Dewberry
Mayo Steam Station Phase II
Potable Water Programmatic
Evaluation
Duke Energy
October 27, 2016
SEAL
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SUBMITTED BY:
Dewberry
2610 Wycliff Road
Suite 410
Raleigh, NC 27607
SUBMITTED TO:
Duke Energy
Table of Contents
ExecutiveSummary ...............................................................................................2
1. Introduction and Project Approach..............................................................4
2. Phase II Basis of Design................................................................................6
2.1 Potable Water Connection Mapping..............................................................
6
2.2 Municipal Potable Water Connection Opinion of Probable Cost.................6
3. Site Analysis...................................................................................................7
3.1 Station Mapping and Household Data..........................................................
7
3.2 Field Observations..........................................................................................
7
3.3 Other Considerations.....................................................................................
8
4. Regulatory Permitting....................................................................................9
5. Schedule........................................................................................................10
6. Opinion of Probable Cost............................................................................11
Appendix A: Mayo Station Phase II Mapping
Appendix B: Mayo Station Household Data Spreadsheet
Appendix C: Schedule
Appendix D: Opinion of Probable Cost
9 Dewberry Duke Energy I Mayo Steam Station Phase 11 Potable Water Programmatic Evaluation 11
Executive Summary
This Phase II evaluation is structured to comply with the requirements of North Carolina House Bill 630:
Section 13oA-309.211.(ci) of House Bill 63o requires provision of permanent water supply for each household that has a
drinking water supply well located within a 1/2 mile radius from the established compliance boundary of a coal combustion
residuals impoundment, and is not separated from the impoundment by the mainstem of a river, or other body of water that
would prevent the migration of contaminants through groundwater from the impoundment to a well.
To address the provisions of House Bill 63o, Dewberry performed this Phase II preliminary engineering evaluation to supply
potable water to residents within a 1/2 mile of the compliance boundary. Preparation of this report is intended to comply with
the House Bill 63o requirement to make a report submittal to the North Carolina Department of Environmental Quality (DEQ)
by December 15, 2o16.
On August 18, 2016 a project review meeting was held at the Duke Energy Line and Service Operations Center in Roxboro, NC.
Representatives from Duke Energy, Dewberry, and the City of Roxboro attended the meeting.
Detailed Phase II mapping was developed using Person County, NC and Halifax County, VA property maps that show each
household in the 1/2 mile compliance buffer. Dewberry visually observed the households shown on the Phase II mapping on
August 12, 2o16.
A household database was developed using Person County, NC and Halifax County, VA tax records tied to the GIS shape file
which identifies the property owner and the address for each household within the 1/2 mile compliance buffer.
Based on our site observations and the Phase II mapping, it appears to be technically feasible to install the potable water main
in the public road right of way or along private roads using conventional construction methods. Easements will be required
along one private road (Mullins Lane).
A schedule was prepared in part to show milestone dates needed to comply with House Bill 630 which states the following:
• Report submittal to the North Carolina DEQ no later than December 15, 2016.
• DEQ renders a final decision to approve or disapprove the report no later than January 15, 2017.
• Permanent replacement water supplies are provided no later than October 15, 2o18.
If each of the milestone dates are met, the schedule indicates that project completion can occur in August of 2o18 which meets
the House Bill 630 schedule requirement for permanent replacement water supplies.
An opinion of probable cost was developed to provide potable water service to eight households within the 1/2 mile compliance
buffer. The number of households and the number of waterline connections are the same. The estimated costs are summarized
below:
TODewberry Duke Energy Mayo Steam Station Phase 11 Potable Water Programmatic Evaluation 2
The potable water connection cost estimate includes a 25% contingency which is deemed consistent with a project at the
preliminary engineering level of detail.
According to Roxboro, the water age in the vicinity of the Steam Station is approximately 9 to 12 days. With such a high water
age, the City of Roxboro has water quality concerns related to residual disinfection concentration and disinfection by-product
formation for any water connection within the 1/2 mile compliance buffer. Despite the concerns, Roxboro indicated that they
would be open to providing service to the 8 households south of the Steam Station, but indicated it would not be feasible to
provide service to the 14 households north of the Steam Station. Therefore this evaluation proposes installation of individual
filtration systems for the 14 households.
This report provides additional detail on the Project Approach, Basis of Design, and Site Analysis. Mayo Steam Station
mapping is provided in Appendix A. The household database is provided in Appendix B. The Mayo Steam Station Potable
Water Schedule is provided in Appendix C, and the Opinion of Probable Cost is provided in Appendix D.
TODewberry Duke Energy Mayo Steam Station Phase 11 Potable Water Programmatic Evaluation 3
1. Introduction and Project Approach
PROJECT INTRODUCTION
During the Phase I programmatic potable water evaluation desktop study, concept level mapping was developed showing the
Mayo Steam Station location, the potential potable water tie-in location, and potential pipe routing to residents within a 1/2
mile of the compliance boundary. We used the Phase I mapping to develop a concept level cost estimate with a 40%
contingency. During this Phase II evaluation sufficient preliminary design work has been performed to prepare a cost estimate
with a 25% contingency.
Section 13oA-309.211.(ci) of House Bill 63o requires provision of permanent water supply for each household that has a
drinking water supply well located within a 1/2 mile radius from the established compliance boundary of a coal combustion
residuals impoundment, and is not separated from the impoundment by the mainstem of a river, or other body of water that
would prevent the migration of contaminants through groundwater from the impoundment to a well.
To address the provisions of House Bill 63o referenced above, Dewberry has performed a Phase I screening level evaluation
and this Phase II preliminary engineering evaluation of the technical and economic feasibility to supply municipal potable
water to residents within a 1/2 mile radius of the compliance boundary. Preparation of this report is intended to comply with
the House Bill 63o requirement to make a report submittal to the North Carolina Department of Environmental Quality (DEQ)
by December 15, 2016.
Using publicly available information Dewberry evaluated the following criteria to perform the Phase II Mayo Steam Station
preliminary engineering study:
• Identified public road right-of-way widths and ownership along the pipe route
• Evaluated feasibility to install the proposed water main within the unpaved shoulder of an NC DOT roadway
• Documented approximate location of U.S. waters, including possible wetlands shown in the U.S. Fish & Wildlife Service
National Wetlands Inventory (as applicable)
• Identified potential jurisdictional and permitting authorities to establish permitting needs
• Estimated potential easement acquisition areas (estimated square footage and number of parcels affected)
• Evaluated potential conflicts with known existing utilities
• Estimated the pipeline length and pipe diameter(s) for the water main and the individual service lines
• Evaluated the potential need for a water booster pump station or elevated tank to sustain adequate water pressure
• Evaluated the water age and potential need for supplemental disinfection
• Evaluated the potential need/requirement for fire hydrants and hydrant quantity
• Evaluated potential construction methods and challenges
• Evaluated potential municipal water system future improvements based on published Capital Improvement Plan (CIP) or
published Master Plan
TODewberry Duke Energy Mayo Steam Station Phase 11 Potable Water Programmatic Evaluation 4
PROJECT APPROACH
Dewberry contacted the Duke Energy Community Relations District Manager to discuss the information needed to execute the
Phase II evaluations, and to arrange for a subsequent meeting with the local water purveyor, the City of Roxboro.
On August 18, 2016 a project review meeting was held at the Duke Energy Line and Service Operations Center in Roxboro, NC
to discuss execution of this Phase II preliminary evaluation and subsequent project execution. Representatives from Duke
Energy, Dewberry, and the City of Roxboro attended the meeting. The primary purpose of the meeting was to confirm the
water distribution system tie-in location, system pressure, pipe size, and water quality at the tie -location, capacity limitations,
and whether there are future planned water system projects that could impact the Phase II evaluation. Dewberry also inquired
as to whether any households within a 1/2 mile of the compliance boundary were presently being served by municipal potable
water. Following the meeting, Dewberry performed an initial drive -by observation of the potable water pipe route.
During Phase I Dewberry obtained municipality mapping of the potable water distribution system and then developed draft
maps showing the Mayo Steam Station, the respective potable water distribution system tie-in location, and the water main
pipe routing. We used the Duke Energy Drinking Water Receptor Surveys for Coal-fired Power Stations developed in 2014 to
show compliance boundaries and the water supply wells within a 1/2 mile of the compliance boundary. The maps were
prepared using GIS as the native software.
During Phase II we developed more detailed mapping based on Person County, NC and Halifax County, VA property maps to
identify property owners, property parcels, and household addresses within the 1/2 mile compliance buffer. For the Phase II
analysis property parcels that were wholly or partly within the compliance buffer were included in the evaluation.
Using the Phase II mapping a database of property owners and household locations was developed. Dewberry also contacted
the City of Roxboro to confirm residents along the existing water mains within the compliance buffer who are connected to the
system. This information allowed for identification of residents who were located along the existing water line but not
connected to the water system. We also prepared a project schedule.
Dewberry then developed an opinion of probable cost for the installation of piping infrastructure to the potable water tie-in
location. We used vendor budgetary costs for the primary capital equipment and used cost factors to estimate the installation
costs. We did not obtain contractor installation cost estimates for this evaluation. Dewberry reviewed the cost data with Duke
Energy to obtain concurrence on the methodology and the allowances applied.
TODewberry Duke Energy Mayo Steam Station Phase 11 Potable Water Programmatic Evaluation 5
2. Phase II Basis of Design
The purpose of this section is to document basis of design assumptions that were used to prepare the Mayo Steam Station
mapping, opinion of cost, and schedule.
2.1 POTABLE WATER CONNECTION MAPPING
Key assumptions for the potable water connection mapping are as follows:
Property parcels that crossed the compliance buffer line were included in the evaluation. Homes on these properties were
included to receive potable water regardless of whether the home was physically inside the buffer or not.
Potable water piping is routed along state roads and may use municipality/county existing easements, where possible.
Water main piping in one location will require private easements.
14 households located north of the Mayo Steam Station are recommended to receive individual filtration systems and were
not included in the cost evaluation.
Power transmission line easements will not be used for installation of the potable water piping.
2.2 MUNICIPAL POTABLE WATER CONNECTION OPINION OF
Key assumptions for the potable water connection cost estimates are as follows:
Item 1 on the cost estimate shows 6" Ductile Iron for the potable water main pipe. The 6" diameter is considered a
conservative pipe size to meet the water demand of the households within the compliance buffer and complies with the
City of Roxboro.
The 6" water main pipe is the smallest diameter allowed for fire hydrant connection. The City of Roxboro water system
design standards require fire hydrants be installed.
Items 1 through 7 on the cost estimate show material cost for the piping, valves, and associated fittings. The sum of Items 1
through 7 is shown as a separate line item. A 30% cost factor is then applied to the summed value to estimate the cost to
install the pipe, valves, and fittings. The cost estimate quantities are based on the Mayo Steam Station mapping and
assumptions stated on the cost estimate. The unit costs are based upon vendor budgetary costs and cost data we have from
recent similar projects.
Item 22 on the cost estimate indicates there are 8 potable water connections with 3/4" service taps.
The number of household connections shown in the cost estimate is based upon the Person County, NC property maps,
drive -by observations, and from exclusion of households that are being served with City of Roxboro water.
Items 8 through 17 and items 21 through 25 are installed cost, so a 30% installation cost factor was not applied.
Items 18 through 20 are material cost, so a 30% installation cost factor was applied.
Items 1 through 25 are summed and shown as a SUBTOTAL. Cost factors are then applied to the SUBTOTAL to estimate
the balance of the project costs. We have applied a 25% contingency which is deemed consistent with a preliminary
engineering evaluation.
Additional assumptions that Dewberry used to prepare the cost estimates are provided as foot notes on the cost estimate
Table.
Contractor General Conditions are included for the duration of on -site construction phase activities.
Easement acquisition includes the cost to compensate land owners for water or service lines extended down private roads
and/or across private property.
TODewberry Duke Energy Mayo Steam Station Phase 11 Potable Water Programmatic Evaluation 6
3. Site Analysis
3.1 STATION MAPPING AND HOUSEHOLD DATA
The municipal potable water Phase II overall map in Appendix A shows the proposed tie-in location to the existing City of
Roxboro potable water supply system, indicating that over one mile (~5,600 LF) of new potable water piping is required to
serve households within the 1/2 mile compliance buffer.
The City of Roxboro is planned to manage and own the water supply, O&M, and metering/billing of water use for the new
potable water system and service connections.
The Phase II Site map and sheets in Appendix A were prepared by overlaying Person County, NC and Halifax County, VA
property maps onto the compliance boundaries detailed in the Duke Energy Drinking Water receptor Surveys for Coal-fired
Power Stations developed in 2014. The Appendix A Site map shows the 1/2 mile compliance buffer and seven (7) rectangular
property map sections. Seven sheets were prepared to show the water main route, individual households, and household
service line connections within the 1/2 mile compliance buffer. Dewberry visually observed households shown in the Appendix
B sheet mapping during the August 12, 2016 drive -by.
The database in Appendix B was created from the Person County, NC and Halifax County, NC tax records tied to the GIS shape
file which identifies the property owner and the address for each household within the 1/2 mile compliance buffer, including
parcels of land with no residents (empty lot). The parcel data listed on the spreadsheets also includes Parcel ID, Land Use,
Easement Requirement, and anticipated Water Demand for each property. Engineering judgment was utilized in cases where
homes were located out of sight from the road and/or multiple structures could be seen during an aerial review.
Review of the mapping from Appendix A allowed for estimates of the required private easement areas around the Mayo Steam
Station. The potable water main proposed to serve residents around the Mayo Steam Station will require private easement
acquisition along one private road (Mullins Lane). The typical municipal easement standard was followed around the Mayo
Steam Station, which includes multiplying the length of the water main or service line on private property by 20 feet to obtain
the area. The area was then multiplied by 50% of the average land value (per acre) as indicated by public tax assessment for
properties around the Mayo Steam Station, providing an estimate of the easement cost. Temporary easements were not
included in the calculation.
3.2 FIELD OBSERVATIONS
As shown in Appendix A, the water main piping will be installed along state roads, where possible. During the August 12, 2o16
drive -by Dewberry noticed several areas where large boulders and rock outcroppings exist in the vicinity of the water main
routes. We have included rock excavation within the schedule and cost estimate.
Based on observations in the drive -by as well as the Phase II mapping, it appears to be technically feasible to install the potable
water main in the public road right of way or along the side of the private roads using conventional construction methods, such
as an open trench with pipe bedding material. Approximately three water main road crossings and two service line road
crossings will be required. Road crossings will be performed by subsurface boring to avoid open road cuts, and traffic impacts.
It should be noted that the crossing count could be modified based upon final design and which side of the road the water main
is installed.
TODewberry Duke Energy Mayo Steam Station Phase 11 Potable Water Programmatic Evaluation 7
Dewberry did not observe surface water or apparent wetland infrastructure encroachment impacts. This is consistent with
USGS mapping and the U.S. Fish & Wildlife Service National Wetlands Inventory.
During the drive -by Dewberry did not observe potential conflicts with known existing utilities. At present the 22 households
within the 1/2 mile radius compliance buffer do not have public water or sewer. Natural gas main and fiber optic markers were
not observed during the drive -by, but are typically located within the state road right of way and are typically smaller in
diameter than water piping, therefore the potential impact on construction is not deemed significant. Aboveground electric
was observed and is not considered an impediment to water main installation.
Dewberry observed the public road right-of-way widths and evaluated the feasibility to install the proposed water main within
the unpaved shoulder of NC DOT roadway. In areas that we could not determine right of way status (public or not) or areas
where private property may have been constructed onto right of way, we either provided an allowance for water main or water
service line easement, or the construction impact is accounted for in the cost estimate as a renovation allowance.
3.3 OTHER CONSIDERATIONS
The City of Roxboro operates a relatively large water system throughout Person County where they manage the water supply,
and meter and bill for water use. The City of Roxboro sources their water from City Lake and Lake Roxboro.
The City of Roxboro estimates the pressure in the system around the Mayo Steam Station to range from 50-6o psi. The City has
confirmed they have adequate water flow capacity to serve the residents around the Mayo Station. Therefore based on this
preliminary information, the flow capacity and pressure is deemed adequate to serve the eight proposed household
connections in the 1/2 mile compliance buffer south of the Mayo Steam Station.
Based on discussions with the City of Roxboro, the water age in the vicinity of the Mayo Steam Station ranges from 9-12 days.
The new potable water connections are located at the end of the water distribution system and the residual disinfection
concentration is low. Two common ways to combat loss of disinfection residual are 1.) disinfection boosting, and 2.) systematic
flushing to maintain flow and minimize water age. Roxboro presently conducts regular flushing in the Mayo area to reduce the
water age, maintain a disinfection residual, and prevent disinfection by-product formation.
With such a high water age, the City of Roxboro has water quality concerns stating that a new water main extension coupled
with limited water demand would complicate the disinfection byproduct compliance. Roxboro indicated that they would be
open to providing service to the households south of the Steam Station, but indicated that they would not be able to provide
service to the households north of the Steam Station.
The new water main extension will serve households south of the Steam Station, utilizes the minimum diameter pipe for
service allowed by Roxboro, and incorporates system flushing. The connection to the City of Roxboro system would be to an
existing 12-inch water main that dead -ends at an existing industrial site. Based upon the current City of Roxboro operational
practices and discussions with system operators, disinfection boosting is not proposed for the system.
Due to water quality concerns, low water demand of the households north of the Steam Station, and future maintenance costs,
Roxboro indicated extending their water system north along US Highway 501 North past the existing industrial site would not
be viable. This would also include extending the line into Virginia.
Based on the issues stated above, this evaluation proposes that the 14 households north of the Mayo Steam Station will be
served with individual filtration systems.
TODewberry Duke Energy Mayo Steam Station Phase 11 Potable Water Programmatic Evaluation 8
4. Regulatory Permitting
The water main design will be required to adhere to requirements of the following agencies and permitting authorities. Each
permit will require a separate set of documentation and will be submitted individually to the respective permitting agency. The
timeline for submittal and approval is presented in the Mayo Steam Station Potable Water Schedule detailed in Appendix C.
• NCDOT Right-of-way Encroachment Agreement, Primary and Secondary Roads
• NCDEQ, Division of Land Quality, Erosion and Sedimentation Control Permit
• NCDEQ, Division of Water Resource, Public Water Supply Permit
TODewberry Duke Energy Mayo Steam Station Phase 11 Potable Water Programmatic Evaluation 9
5. Schedule
The Phase II project schedule is provided in Appendix C.
The schedule was prepared in part to show milestone dates needed to comply with House Bill 630 which states the following:
• "No later than December 15, 2016 an impoundment owner shall submit information on permanent replacement water
supplies proposed to be provided to each household"
• "The Department shall evaluate information submitted by the impoundment owner and render a final decision to approve
or disapprove the plan, including written findings of fact no later than January 15, 2017"
• "As soon as practical, but no later than October 15, 2018 the owner of a coal combustion residual surface impoundment
shall establish permanent replacement water supplies"
The schedule indicates DEQ report submittal on December 15, 2016 and DEQ approval by January 15, 2017. The schedule
includes an initial go day negotiation period for development and execution of a Water Authority/Duke memorandum of
understanding (MOU). The schedule is subject to change dependent upon the milestone dates for the MOU, the
approval/comments from DEQ, and the resident input regarding permanent water supply choice.
The balance of the schedule is deemed typical for a municipal design -bid -build water line improvement project and plans for
all households to connect to public potable water. The schedule indicates an end date of August 2018 which meets the October
15, 2018 deadline.
TODewberry Duke Energy Mayo Steam Station Phase 11 Potable Water Programmatic Evaluation 10
6. Opinion of Probable Cost
The Phase II opinion of probable cost is provided in Appendix D. The opinion of probable cost was prepared in accordance
with the basis of design criteria in Section 2.2 of this report.
The opinion of probable cost indicates that the total estimated cost to construct eight new municipal water connections is
approximately $1,200,000, which equates to approximately $150,000 per household. A 25% contingency is included.
The Phase II opinion of probable cost includes individual allocations for the service connection lines and meters (items 18
through 25) that equates to approximately $9,00o per new connection. We arrived at that allocation as follows:
For item 19 the service line lengths were measured for each household using the Phase II sheet mapping. Item 20 is for
miscellaneous fittings associated with the service line connections.
For items 21 and 22 the meter/meter box allowance was developed from vendor quotations and from recent bid
tabulations for similar projects.
Item 23 is for road crossings where the household to be served is on the opposite side of the road from the water main.
Items 24 and 25 represent site costs associated with approximately 2,300 feet of new service line piping.
TODewberry Duke Energy Mayo Steam Station Phase 11 Potable Water Programmatic Evaluation 11
Appendix A: Mayo Station Phase II
Mapping
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October 27, 2016
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Duke Energy
Dewberry Proj. No. 50081778
Proposed
Potable Water Site
Preliminary Evaluation
Mayo Steam Station
Overall
Legend
County Boundary
Proposed Potable Water Line
(Duke)
Compliance Boundary 1/2 Mile Buffer
Compliance Boundary
Existing Potable Water Line
(City of Roxboro)
Wetlands
Duke Energy Plant
Railway
State Route
Stream/Lake
Recommended Individual
Filtration System
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1 in = 2,000 feet
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October 27, 2016
Dewberry -
Duke Energy
Dewberry Proj. No. 50081778
Proposed
Potable Water Site
Preliminary Evaluation
Mayo Steam Station
Sheet 1
Legend
County Boundary
Proposed Potable Water Line
(Duke)
Proposed Service Lines
(Duke)
Compliance Boundary 1/2 Mile Buffer
Compliance Boundary
Existing Potable Water Line
(City of Roxboro)
Wetlands
Duke Energy Plant
Railway
Stream/Lake
Recommended Individual
Filtration System
® Parcel Reference Number
(Refer to spreadsheet for parcel details)
-X+
1 in = 200 feet
0 200 400
Feet
October 27, 2016
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Duke Energy
Dewberry Proj. No. 50081778
Proposed
Potable Water Site
Preliminary Evaluation
Mayo Steam Station
Sheet 2
Legend
County Boundary
Proposed Potable Water Line
(Duke)
Proposed Service Lines
(Duke)
Compliance Boundary 1/2 Mile Buffer
Compliance Boundary
Existing Potable Water Line
(City of Roxboro)
Wetlands
Duke Energy Plant
Railway
Stream/Lake
Recommended Individual
Filtration System
® Parcel Reference Number
(Refer to spreadsheet for parcel details)
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1 in = 200 feet
0 200 400
Feet
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Duke Energy
Dewberry Proj. No. 50081778
Proposed
Potable Water Site
Preliminary Evaluation
Mayo Steam Station
Sheet 3
Legend
County Boundary
Proposed Potable Water Line
(Duke)
Proposed Service Lines
(Duke)
Compliance Boundary 1/2 Mile Buffer
Compliance Boundary
Existing Potable Water Line
(City of Roxboro)
Wetlands
Duke Energy Plant
Railway
Stream/Lake
Recommended Individual
Filtration System
® Parcel Reference Number
(Refer to spreadsheet for parcel details)
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1 in = 200 feet
0 200 400
Feet
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October 27, 2016
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Duke Energy
Dewberry Proj. No. 50081778
Proposed
Potable Water Site
Preliminary Evaluation
Mayo Steam Station
Sheet 4
Legend
County Boundary
Proposed Potable Water Line
(Duke)
Proposed Service Lines
(Duke)
Compliance Boundary 1/2 Mile Buffer
Compliance Boundary
Existing Potable Water Line
(City of Roxboro)
Wetlands
+ Duke Energy Plant
Railway
Stream/Lake
Recommended Individual
Filtration System
® Parcel Reference Number
(Refer to spreadsheet for parcel details)
N
1 in = 200 feet
0 200 400
Feet
October 27, 2016
et' Dewberry -
Duke Energy
Dewberry Proj. No. 50081778
Proposed
Potable Water Site
Preliminary Evaluation
Mayo Steam Station
Sheet 5
Legend
County Boundary
Proposed Potable Water Line
(Duke)
Proposed Service Lines
(Duke)
Compliance Boundary 1/2 Mile Buffer
Compliance Boundary
Existing Potable Water Line
(City of Roxboro)
Wetlands
+ Duke Energy Plant
Railway
Stream/Lake
Recommended Individual
Filtration System
Parcel Reference Number
(Refer to spreadsheet for parcel details)
N
1 in = 200 feet
0 200 400
Feet
October 27, 2016
et' Dewberry -
Duke Energy
Dewberry Proj. No. 50081778
Proposed
Potable Water Site
Preliminary Evaluation
Mayo Steam Station
Sheet 6
Legend
County Boundary
Proposed Potable Water Line
(Duke)
Proposed Service Lines
(Duke)
Compliance Boundary 1/2 Mile Buffer
Compliance Boundary
Existing Potable Water Line
(City of Roxboro)
Wetlands
+ Duke Energy Plant
Railway
Stream/Lake
Recommended Individual
Filtration System
® Parcel Reference Number
(Refer to spreadsheet for parcel details)
N
1 in = 200 feet
0 200 400
Feet
If
�� - }� Ji;fAlr �' a�' 7�'Co-�E' •�...� $ � F t'• ;i. .Yt � "y' _ _ '_ � _, ,.
' -Iwo'
vo
_ :F1 ; 4 ♦ .. - �' ' - _ � � !;ems �
f _
�e
r
01
os
7,
0
w .• { �_•
41
041
October 27, 2016
et' Dewberry -
Duke Energy
Dewberry Proj. No. 50081778
Proposed
Potable Water Site
Preliminary Evaluation
Mayo Steam Station
Sheet 7
Legend
County Boundary
Proposed Potable Water Line
(Duke)
Proposed Service Lines
(Duke)
Compliance Boundary 1/2 Mile Buffer
Compliance Boundary
Existing Potable Water Line
(City of Roxboro)
Wetlands
+ Duke Energy Plant
Railway
Stream/Lake
Recommended Individual
Filtration System
® Parcel Reference Number
(Refer to spreadsheet for parcel details)
1 in = 200 feet
0 200 400
Feet
Appendix B: Mayo Station
Household Data Spreadsheet
www.dewberry.com
Mayo Steam Station Parcel Spreadsheet
Label Parcel ID #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
1738
1746
2742
2787
2815
2881
2882
2883
2937
2952
2953
21470
21473
23621
23622
23623
23624
23625
23626
23627
23628
23629
23630
23631
23632
3365-24410
3365-27009
3365-22883
3365-24411
3375-18624
3365-27033
3365-27032
3365-7856
3365-26196
3365-26194
3365-7855
3365-17400
3366-7808
11969/11939
12015
10475
369
682
582
206
236
209
153
77
12013/12089
2093
12102
3967
1025
1025
11243
11243
11243
1044
1022
11167
Site Address
BOSTON RD
BOSTON RD
MAYO LAKE RD
OLD US 501 HWY
MAYO LAKE RD
BOSTON RD
BOSTON RD
BOSTON RD
BOSTON RD
MULLINS LN
OLD US 501 HWY
OLD US 501 HWY
OLD US 501 HWY
MULLINS LN
MULLINS IN
MULLINS LN
MULLINS LN
MULLINS LN
MULLINS IN
MULLINS LN
MULLINS LN
MULLINS LN
MULLINS LN
MULLINS LN
OLD US 501 HWY
BOSTON RD
BOSTON RD
BOSTON RD
9TH LANE
WOODY LOOP
WOODY LOOP
HUELL MATTHEWS HWY
HUELL MATTHEWS HWY
HUELL MATTHEWS HWY
WOODY LOOP
WOOD LOOP
HUELL MATTHEWS HIGH
39 3366-26301 1022 WOODY LOOP
North of Plant/ City Water
South of Plant
Northern
Northern
Northern
Southern
Northern
Northern
Northern
Northern
Southern yes
Southern
Southern
Southern
Southern
Southern
Southern
Southern
Southern
Southern
Southern
Southern
Southern
Southern
Southern
Southern
Southern
Northern
Northern
Northern
Northern
Northern
Northern
Northern
Northern
Northern
Northern
Northern
Northern
Northern
Northern
Type of Service
Business, Office, Factory
w/o showers
N/A
Residential
N/A
N/A
N/A
N/A
Residential
N/A
Residential
Residential
Residential
N/A
Residential
Residential
N/A
N/A
N/A
N/A
N/A
Residential
Residential
N/A
Residential
N/A
N/A
Residential
Residential
Residential
N/A
N/A
Residential
N/A
Residential
N/A
Residential
N/A
Residential
Residential
EasementRequired
Land Use
Owner
Tax Address
City State
In Use
STARLITES TECHNOLOGY INC
66 LILY MCCOY LN
0
Empty Lot
EASTWOOD HOWARD L & DONNA W
309 EASTWOOD LONG LN
0
In Use
MERRITTJOHN H III
3967 9TH LN
0
Empty Lot
FLORES FELIPE & MARTHA
582 OLD US 501
0
Empty Lot
PEED DOYLE & PEED DURWOOD
428 BETHEL HILL SCHOOL RD
0
Empty Lot
EASTWOOD HOWARD L & DONNA W
309 EASTWOOD LONG LN
0
Empty Lot
EASTWOOD HOWARD L & DONNA W
309 EASTWOOD LONG LN
0
In Use
EASTWOOD HOWARD L & DONNA W
309 EASTWOOD LONG LN
0
In Use
LOUISIANA PACIFIC CORPORATION
10475 BOSTON RD//RICK MILLER
0
In Use
SHEETS CHARLES DAVIS
369 MULLINS LN
Yes
480
In Use
FLORES LENOR & ALFREDO ANAYA
682 OLD US 501
480
In Use
FLORES FELIPE & MARTHA
582 OLD US 501
480
Empty Lot
FLORES FELIPE & MARTHA
582 OLD US 501
0
In Use
CLAYTON KEITH W
206 MULLINS LN
Yes
480
In Use
WOMACK MICHAEL DEAN
236 MULLINS LN
Yes
480
Empty Lot
SEYMOUR MARY LINK
230 LESTERS WAY
Yes
0
Empty Lot
SHEETS CHARLES DAVIS
369 MULLINS LN
Yes
0
Empty Lot
MAILLETJOSEPH &JEAN
841 PAMELA DR
Yes
0
Empty Lot
KEE GWENDOLYN M
4133 NE W 67TH TER
Yes
0
Empty Lot
JONES BONNIE L & LARRY V
4 PAGE MORE CT
Yes
0
In Use
DMG PROPERTIES LLC/Timothy Barwick
119 S MADISON BLVD
Yes
480
In Use
SERRANT WALTER G
153 MULLINS LN
Yes
480
Empty Lot
POOLE EARL D EST
630 PROVIDENCE RD
Yes
0
In Use
JONES MICHAEL D
77 MULLINS LN
Yes
480
Empty Lot
THOMAS EUNICE & CARLTON THOMAS
682 OLD US 501
0
Empty Lot
TINGEN, KEVIN MORTON
P.O.BOX 12580
0
In Use
REAVES, LAURIE S
P 0 BOX 997
0
In Use
SLAUGHTER, LAURIE A
P O BOX 997
0
In Use
TINGEN, KEVIN MORTON
P.O.BOX 12580
0
Empty Lot
MERRITT, JOHN H III
3967 9TH LANE
0
Empty Lot
WOODY, FREDDIE R.
1025 WOODY LOOP
0
In Use
WOODY, MARY B
1025 WOODY LOOP
0
Empty Lot
WILBORN, WILLIAM J SR & BRENDA L
11243 HUELL MATTHEWS HWY
0
In Use
WILBORN, WILLIAM J. SR.
11243 HUELL MATTHEWS HWY
0
Empty Lot
WILBORN, WILLIAM J SR & BRENDA L
11243 HUELL MATTHEWS HWY
0
In Use
JOHNSON, ADDISON JR. & DIANNE G.
P 0 BOX 3463
0
Empty Lot
WILKINS, CHARLES P OR
1022 WOOD LOOP
0
In Use
BROWN, KAY M
11167 HUELL MATTHEWS HIGH
0
In Use
WILKINS, CHARLES P & NELLIE W
1022 WOODY LOOP
0
Req' Daily Flow Other Notes
Recommended Individual
Gallons/shift
Filtration System
#N/A
Gallons/connection
Recommended Individual
Filtration System
#N/A
#N/A
#N/A
#N/A
Gallons/connection
Recommended Individual
Filtration System
#N/A
Gallons/connection
Gallons/connection
Gallons/connection
#N/A
Gallons/connection
Gallons/connection
#N/A
#N/A
#N/A
#N/A
#N/A
Gallons/connection
Gallons/connection
#N/A
Gallons/connection
#N/A
#N/A
Gallons/connection
Recommended Individual
Filtration System
Gallons/connection
Recommended Individual
Filtration System
Gallons/connection
Recommended Individual
Filtration System
#N/A
#N/A
Gallons/connection
Recommended Individual
Filtration System
#N/A
Gallons/connection
Recommended Individual
Filtration System
#N/A
Gallons/connection
(3) Recommended Individual
Filtration System
#N/A
Gallons/connection
(2) Recommended Individual
Filtration System
Gallons/connection
Recommended Individual
Filtration System
Appendix C: Schedule
www.dewberry.com
Name Start Finish ter I4th,Quarter Ilst
2nd, Quarter 13rd ,Quarter 14th ,Quarter 11st
3rd
4th
1
Mayo DEQ Report Submittal & Approval Thu 12/15/16 Sun 1/15/17
Municipality/County Negotiation & Agreement Mon 11/14/16 Fri 2/10/17
Municipality/County Design Agreement Period Mon 11/14/16 Fri 2/10/17
Municipality/County System Design (assuming NTP within 30 days of Mon 2/20/17 Wed 8/23/17
agreement)
Field Work/Survey Mon 2/20/17 Tue 3/21/17
30% Design Development Wed 3/22/17 Fri 4/28/17
Development of 30% Construction Documents Wed 3/22/17 Fri 4/21/17
Review of 30% Design Mon 4/24/17 Fri 4/28/17
30% Design Review Meeting Fri 4/28/17 Fri 4/28/17
60% Design Development Mon 5/1/17 Fri 6/23/17
Development of 60% Construction Documents Mon 5/1/17 Fri 6/9/17
Review of 60% Design Mon 6/12/17 Fri 6/23/17
60% Design Review Meeting Fri 6/23/17 Fri 6/23/17
Final Design Development Mon 6/26/17 Fri 8/4/17
Development of 100% Construction Documents Mon 6/26/17 Tue 7/25/17
Review of 100% Design Wed 7/26/17 Fri 8/4/17
100% Design Review Meeting Fri 8/4/17 Fri 8/4/17
Easement Development Mon 5/1/17 Wed 8/23/17
Deed Research Mon 5/1/17 Tue 5/30/17
Develop Plats Mon 6/26/17 Tue 7/25/17
Easement Acquisition Wed 7/26/17 Wed 8/23/17
Permitting Mon 8/7/17 Fri 11/17/17
NC EM&L E&S Control Permit Mon 8/7/17 Fri 10/6/17
NCDOT Encroachment (State and District) Mon 8/7/17 Fri 10/27/17
Authorization to construct a public water supply Mon 8/7/17 Fri 11/17/17
Advertise, Bidding & Contracting Mon 11/20/17 Fri 2/16/18
NTP Fri 2/16/18 Fri 2/16/18
Construction of Water Main & Services Mon 2/19/18 Fri 7/20/18
Substantial Completion, System Testing, & Certification Mon 7/23/18 Tue 8/21/18
project Completion Tue 8/21/18 Tue 8/21/18
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Project: Mayo Steam Station Manual Summary Rollup
Proposed Schedule
2/16
8/21
Page 1
Appendix D: Opinion of Probable
Cost
www.dewberry.com
FINAL
Opinion of Probable Cost
Mayo Steam Station Potable Water Connection
Item
I Material
Unit
QQt y
Unit Cost
Extended Cost
Main
1
6-inch DI Pipe
LF
5,600
$
15.00
$ 84,000
2
6-inch Tee
EA
2
$
850
$ 1,700
3
6-inch Gate Valve w/Box (assume three at every tee and one per 5,000 LF)
EA
8
$
750
$ 6,000
4
Misc Fittings (Assume 2 fittings per appurtenance plus 1 fitting per 1000 LF pipe times 80# per fitting)
LB
1,800
$
4.00
$ 7,200
5
Automatic Flushing Devices
EA
2
$
8,000
$ 16,000
6
Fire Hydrant
EA
3
$
6,000
$ 18,000
7
1-inch Air Release Valve and Manhole (at highpoints in main)
EA
1
$
2,200
$ 2,200
Subtotal Materials/Equipment:
$ 135,100
Installation (% of Material/Equipment):
30%
$ 40,600
8
Clearing & Grubbing
LF
5,600
$
3.50
$ 19,600
9
Excavation and Backfilling for Trench
LF
5,600
$
18.00
$ 100,800
10
Pipe Bedding Material (#67 Stone - assumed for 25% of pipe)
CY
130
$
35.00
$ 4,600
11
Rock Excavation
CY
519
$
200.00
$ 103,800
12
Railroad Crossing (Casing, Piping, Spiders and Installation)
EA
0
$
50,000
$ -
13
Rural Road Crossing for Main (Casing, Piping, Spiders and Installation)
EA
3
$
20,000
$ 60,000
14
Erosion Control Measures (Silt Fence/Check Dams based on feet of pipe)
LF
5,600
$
4.50
$ 25,200
15
Testing, Disinfection, Clean Up, Seed and Mulch (Assume: 25-ft impacted area)
LF
5,600
$
8.50
$ 47,600
16
Connection to Existing Waterline
EA
1
$
5,000
$ 5,000
17
Traffic Control
LS
1
$
15,000
$ 15,000
Services Connections/Lines
18
2-inch PVC Pipe
LF
0
$
4.75
$ -
19
3/4-inch PVC Pipe
LF
2,300
$
3.00
$ 6,900
20
Misc Fittings for Service Connections (valves, fittings, etc.)
EA
8
$
300
$ 2,400
Subtotal Materials/Equipment:
$ 9,300
Installation (% of Material/Equipment):
30%
$ 2,800
21
2-inch Services Taps, Meters, Meter Boxes and Misc. Connections to Main Line
EA
0
$
6,000
$ -
22
3/4-inch Services Taps, Meters, Meter Boxes and Misc. Connections to Main Line
EA
8
$
3,000
$ 24,000
23
Road Crossing for Services - (Jetting/bore, Casing, and Installation)
EA
2
$
1,500
$ 3,000
24
Excavation and Backfilling for Service Trench
LF
2,300
$
10.00
$ 23,000
25
Flush, Clean Up, Seed and Mulch (Assume: 5-ft impacted area)
LF
2,300
$
4.00
$ 9,200
SUBTOTAL
$ 629,000
Sub -Total
FOB Allowance (% of Material/Equipment):
2%
$ 3,000
Renovation Allowance (% of Material/Equipment):
5%
$ 8,000
Sub -Total
$ 640,000
Contractor Overhead and Profit:
15%
$ 96,000
Contractor General Conditions:
MONTH
6
$
20,000
$ 120,000
Sub -Total:
$ 856,000
Contingency:
25%
$ 214,000
Sub -Total:
$ 1,070,000
Design, Bid Phase, and Construction Phase Engineering Services
10%
$ 107,000
Easements Acquistion (Permanent)
$
20,000.00
$ 20,000
TOTAL ESTIMATED CAPITAL COST:
$ 1,200,000
Notes:
1.) Renovation Allowance to account for private property refurbishment (signs, fences, etc.)
2.) Number of Service Taps taken from field evaluation and property records.
3.) Permanent Easement Acquisition based on 50% of average area property tax value
4.) Temporary easements are not included in this estimate.
5.) No significant water crossings, wetlands, or other abnormal working environment included.
6.) Opinion of Probable Cost dated October 2016; cost may vary depending upon escalation at time of construction.
7.) Piping footage may change with final design.
10/25/2016 FINAL
Dewberry