HomeMy WebLinkAboutResolution No. 2019-042
2018 WASTEWATER MASTER PLAN UPDATE
Prepared for:
City of The Colony
April 24, 2019
Prepared by:
FREESE AND NICHOLS, INC.
4055 International Plaza, Suite 200
Fort Worth, Texas 76109
817-735-7300
2018 WASTEWATER
MASTER PLAN UPDATE
Prepared for:
City of The Colony
Prepared by:
FREESE AND NICHOLS, INC.
4055 International Plaza, Suite 200
Fort Worth, Texas 76109
817-735-7300
FNI Project Number: COY17543
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TABLE OF CONTENTS
EXECUTIVE SUMMARY ................................................................................................................... ES-1
1.0 INTRODUCTION ....................................................................................................................... 1-1
1.1 Scope of Work ..................................................................................................................................... 1-1
1.2 List of Abbreviations ........................................................................................................................ 1-2
2.0 POPULATION AND WASTEWATER FLOW PROJECTIONS .......................................... 2-1
2.1 Historical Population ....................................................................................................................... 2-1
2.2 Future Population Projections ..................................................................................................... 2-1
2.3 Wastewater Projections ................................................................................................................. 2-8
3.0 WASTEWATER SYSTEM OVERVIEW AND HYDRAULIC ANALYSIS.......................... 3-1
3.1 Wastewater System and Service Area ....................................................................................... 3-1
4.0 HYDRAULIC ANALYSIS .......................................................................................................... 4-1
4.1 GIS and Wastewater Model Update............................................................................................ 4-1
4.2 Wastewater Treatment Plant Capacity Evaluation .............................................................. 4-6
5.0 WASTEWATER SYSTEM CIP ................................................................................................ 5-1
5.1 Previous Wastewater Master Plan ............................................................................................. 5-1
5.2 Current Wastewater CIP ................................................................................................................. 5-3
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List of Figures
Figure 2-1: Geocoded Water Billing Meters ....................................................................................... 2-4
Figure 2-2: Future Developments .......................................................................................................... 2-5
Figure 2-3: Population Projections by Wastewater Sub-Basin ................................................... 2-6
Figure 2-4: Non-Residential Development by Wastewater Sub-Basin .................................... 2-7
Figure 2-5: Historical and Projected Population and Flow ....................................................... 2-10
Figure 3-1 Wastewater System Diameter Summary ..................................................................... 3-1
Figure 3-2: Wastewater Service Area ................................................................................................... 3-2
Figure 3-3: Existing Wastewater System ............................................................................................ 3-3
Figure 4-1: Updated Existing Wastewater System .......................................................................... 4-3
Figure 4-2: Modeled Wastewater System ........................................................................................... 4-4
Figure 4-3: Buildout Flow Depth to Diameter Results ................................................................... 4-5
Figure 4-4: WWTP Capacity and Projected Wastewater Flows ................................................. 4-7
Figure 5-1: Previous (2015) Wastewater CIP Map ......................................................................... 5-2
Figure 5-2: Wastewater System Capital Improvement Plan Map .............................................. 5-5
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List of Tables
Table ES-1: Projected Wastewater Flow Summary ...................................................................... ES-2
Table ES-2: Wastewater CIP Costs ....................................................................................................... ES-3
Table 1-1: Abbreviations.......................................................................................................................... 1-2
Table 2-1: Historical Population ........................................................................................................... 2-1
Table 2-2: Projected Population ........................................................................................................... 2-2
Table 2-3: Summary of Non-Residential Acreage by Wastewater Sub-Basin ..................... 2-3
Table 2-4: Historical WWTP Flows ...................................................................................................... 2-8
Table 2-5: Wastewater Flow Projection Summary ..................................................................... 2-10
Table 5-1: Completed Projects from Previous (2014) Wastewater CIP ................................ 5-1
Table 5-2: Estimated Unit Cost for Wastewater System Construction in 2018 Dollars .. 5-3
Table 5-3: Wastewater System Capital Improvements Plan Costs.......................................... 5-4
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Appendices
Appendix A: Flow Projections
Appendix B: CIP— Opinions of Probable Cost
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EXECUTIVE SUMMARY
1.0 INTRODUCTION
The City of The Colony (City) is a growing community located in the Dallas-Fort Worth Metroplex. Freese
and Nichols, Inc. (FNI) was retained by the City of The Colony to update the Wastewater Master Plan and
Capital Improvements Plan. The previous master plan update was completed in 2014 by FNI. Since then,
population projections and land uses have changed due to recent development. This Wastewater Master
Plan and Capital Improvements Plan Update was performed concurrently with the City’s Water Master
Plan and Capital Improvements Plan Update. Updating the two plans simultaneously allowed for
uniformity of assumptions such as population projections and growth distribution. This report has been
prepared to provide the City of The Colony with a planning tool to serve as a guide for 5-year, 10-year,
and Buildout improvements to wastewater infrastructure.
2.0 POPULATIONS AND WASTEWATER FLOW
Population and land use are important elements in the analysis of wastewater systems. FNI reviewed
historical population data from North Central Texas Council of Governments (NCTCOG), projected
population data from the Texas Water Development Board (TWDB) Region C Plan, and historical flow data
to the City’s wastewater treatment plant (WWTP) which provided the basis for projecting future
wastewater flows. This Wastewater Master Plan Update was prepared in conjunction with the City’s
Water Master Plan Update to maintain consistency with assumptions and methodology where possible.
The City’s population is expected to grow by more than 25,000 people before Buildout conditions are
reached. The spatial distribution of the projected wastewater flows was determined from land use
assumptions and future residential and commercial development information provided by the City.
The projected population, average daily flows, and peak wet weather flows for each planning horizon are
summarized in Table ES-1. Average dry weather flows were projected based on population projections,
future development areas and estimated gallons per capita per day (gpcd) values for each sewer basin. A
2.5 peaking factor was applied to the average dry weather flow rates to determine peak dry weather flow
rates for each sub-basin. Peak wet weather flow was calculated by adding peak inflow and infiltration (I/I)
contribution to the peak dry weather flow. Peak I/I contribution was calculated by applying a flow per
acreage value to the total developed area (residential and commercial) of each sub-basin. To account for
aging system infrastructure and corresponding increases in I/I, the estimated I/I factor was increased from
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ES-2
850 gpd/acre in the existing system (2018) to 900 gpd/acre in the 2023 and 2028 planning years and to
1,000 gpd/acre for Buildout.
Table ES-1: Projected Wastewater Flow Summary
Year Population
Average Dry
Weather Flow
(MGD)
Peak Dry
Weather Flow
(MGD)
Peak Wet
Weather Flow
(MGD)
2018 42,292 3.46 8.64 12.18
2023 48,436 4.02 10.05 14.97
2028 53,477 4.60 11.49 17.58
Buildout 67,600 5.77 14.44 21.68
3.0 WASTEWATER SYSTEM OVERVIEW AND HYDRAULIC ANALYSIS
Since the 2014 Wastewater Master Plan Update, the City has completed seven projects from the previous
Capital Improvements Plan. As part of this update, FNI upgraded the City’s previous H20 Map Sewer
model to InfoSewer by Innovyze® and updated the model to include recent infrastructure improvements
and revised flow projections. A steady-state analysis under peak wet weather flow conditions was
performed for each planning period scenario: 2018 (Existing), 2023, 2028, and Buildout to evaluate system
performance. The model results were used to develop the proposed capital improvement plan.
4.0 UPDATED WASTEWATER SYSTEM CIP
The updated 2018 Wastewater Capital Improvement Plan (CIP) has three planning periods: 2018 to 2023,
2023 to 2028, and 2028 to Buildout. The 5-year planning period (2018-2023) includes six projects. The
new 20-inch Austin Ranch Force Main project and upgrades to the Austin Ranch Lift Station pumps will
expand capacity in the Austin Ranch area to serve future growth. A dewatering upgrade project at the
WWTP is also included in the short-term phase. Extending the collection system to serve the northeast
area of Wynnwood Peninsula (Wynnwood Peninsula Sewer Basin 3, “WP-3”) is included to serve future
expected growth. Upsizing a portion of gravity sewer along Curry Road is needed to eliminate an existing
capacity bottleneck in the system. Finally, an additional gravity sewer extension to serve an area in Austin
Ranch east of the railroad tracks (Indian Creek Sewer Basin 3, IC-3) is included to serve future projected
growth.
The 10-year planning period (2023-2028) includes four projects. An extension of gravity sewer to serve
development in the Austin Ranch area, west of Plano Parkway, is needed due to future projected growth.
A parallel 12-inch force main from the Austin Ranch Lift Station will connect to the proposed 20-inch
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Austin Ranch force main (Project 1). The parallel 12-inch force main will expand capacity of the Austin
Ranch Lift Station needed to convey future projected flows. Rehabilitation of the Wynnwood Lift Station
is also included due to extend the life of the asset. Finally, capacity expansion at the WWTP will be required
to treat future projected flows.
The long-term planning period (2028-Buildout) includes three projects to serve existing and future growth
on the Wynnwood Peninsula.
Table ES-2 summarizes the costs of the updated Wastewater CIP.
Table ES-2: Wastewater CIP Costs
Planning Period Cost
2018-2023 (Short Term) Total $ 25,969,700
2023-2028 (Intermediate) Total $ 44,581,800
2028-Buildout (Long Term) Total $ 2,813,100
CIP Total $ 73,364,600
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1.0 INTRODUCTION
Freese and Nichols, Inc. (FNI) was retained by the City of The Colony to update and evaluate the City’s
existing wastewater collection system and to recommend an updated Capital Improvements Plan (CIP)
through Buildout. The previous master plan update was completed in 2014 by FNI. Since that time,
population projections and distribution have changed due to recent development. The City’s population
is expected to grow by more than 25,000 people before Buildout conditions are reached. The purpose of
this project is to evaluate the proposed collection system and to determine the effect the revised flow
projections have on the capital improvement plan. This Wastewater Master Plan and Capital
Improvements Plan Update was performed concurrently with the City’s Water Master Plan and Capital
Improvements Plan Update. Updating the two plans simultaneously allowed for uniformity of
assumptions such as population projections and growth distribution. This report has been prepared to
provide the City of The Colony with a planning tool to serve as a guide for 5-year, 10-year, and Buildout
improvements to wastewater infrastructure.
1.1 SCOPE OF WORK
The major elements of the scope of this project included:
• Update wastewater flow projections for 5-year, 10-year, and Buildout conditions
• Update the wastewater collection system GIS and hydraulic model
• Hydraulic modeling of existing and future wastewater system
• Update Wastewater Capital Improvement Plan, CIP Schedule, CIP Mapping, and Cost
Estimates
• Prepare Wastewater Master Plan Update Report
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1.2 LIST OF ABBREVIATIONS
Table 1-1 provides a list of abbreviations used in this report.
Table 1-1: Abbreviations
Abbreviation Full Nomenclature
CCN Certificate of Convenience and Necessity
CIP Capital Improvements Plan
ETJ Extraterritorial Jurisdiction
FM Force main
FNI Freese and Nichols, Inc.
GIS Geographic Information System
gpad gallons per acre per day
gpcd gallons per capita per day
gpm gallons per minute
I/I Inflow and Infiltration
LS Lift Station
MGD Million Gallons per Day
NCTCOG North Central Texas Council of Governments
SC Stewart Creek
WP Wynnwood Peninsula
WWTP Wastewater Treatment Plant
TCEQ Texas Commission on Environmental Quality
TWDB Texas Water Development Board
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2-1
2.0 POPULATION AND WASTEWATER FLOW PROJECTIONS
2.1 HISTORICAL POPULATION
Population data from 2011 through 2017 was obtained from the North Central Texas Council of
Governments (NCTCOG). An average population growth rate of 2.15% and a maximum growth rate of
3.39% were observed over the last 7 years. Table 2-1 shows the historical populations for the City of The
Colony.
Table 2-1: Historical Population
Year Population(1) Growth
Rates
2011 36,230 -
2012 36,590 0.99%
2013 37,510 2.51%
2014 38,730 3.25%
2015 39,310 1.50%
2016 39,810 1.27%
2017 41,160 3.39%
Average - 2.15%
Maximum - 3.39%
(1) Based on NCTCOG estimates.
2.2 FUTURE POPULATION PROJECTIONS
Population projections were developed concurrently with the City’s Water Master Plan Update to
maintain uniformity between the two plans. For future population projections, a growth rate of 2.75%,
slightly higher than the historical average, was assumed for the first five-year planning period. After the
initial planning period, the growth rate is expected to decrease to 2.00% and remain constant through
Buildout conditions. The 2016 Region C Water Plan projects that the City will reach a Buildout population
of 67,000 people. For this update, FNI assumed that Buildout conditions would be reached by 2040. Table
2-2 shows the future population projections through Buildout conditions for the City of The Colony.
Planning horizon years for this study were 2018, 2023, 2028, and Buildout.
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Table 2-2: Projected Population
Year Population Growth
Rates
2018 42,292 2.75%
2019 43,455 2.75%
2020 44,650 2.75%
2021 45,878 2.75%
2022 47,139 2.75%
2023 48,436 2.75%
2024 49,405 2.00%
2025 50,393 2.00%
2026 51,400 2.00%
2027 52,428 2.00%
2028 53,477 2.00%
2029 54,547 2.00%
2030 55,637 2.00%
2031 56,750 2.00%
2032 57,885 2.00%
2033 59,043 2.00%
2034 60,224 2.00%
2035 61,428 2.00%
2036 62,657 2.00%
2037 63,910 2.00%
2038 65,188 2.00%
2039 66,492 2.00%
Buildout 67,600 -
FNI utilized geocoded water billing information from July 2017 to proportionally distribute population to
each of the wastewater sub-basins for existing conditions. Of the 13,178 meters received, 99% were able
to be matched to locations within the City limit. Figure 2-1 shows the geocoded water billing meters. The
City provided information on updates to existing land use information and recently constructed new
developments throughout the sewer service area. This information was used to update the residential
and commercial developed area estimates and wastewater flow estimates for each of the sub-basins.
The City also provided input about anticipated future residential and commercial developments. The
anticipated future developments used to update this Master Plan are shown on Figure 2-2. Detailed
population spatial allocation was broken down by wastewater sub-basin and determined based on
residential development information provided by the City. Figure 2-3 shows population distribution by
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2-3
wastewater sub-basin for each planning period. To capture growth related to commercial, retail, office,
institutional, and industrial development, a non-residential acreage for each planning period was
developed for each wastewater sub-basin. Table 2-3 summarizes the projected non-residential acreage
for each wastewater sub-basin. Figure 2-4 presents the projected distribution of non-residential acreages
by planning year. As seen in the figures, much of the growth during the five-year planning period is
expected in the Wynnwood peninsula area, along the Highway 121 corridor, and in the Indian Creek sub-
basin. During the ten-year planning horizon, growth is expected south of Highway 121 in the “Grandscape”
area and southern Indian Creek region.
Table 2-3: Summary of Non-Residential Acreage by Wastewater Sub-Basin
Year
Wynnwood
Peninsula
(acres)
Stewart Creek
(acres)
Indian Creek
(acres)
Total
(acres)
2018 20 1,222 72 1,314
2023 98 1,374 72 1,544
2028 98 1,424 257 1,779
Buildout 109 1,489 299 1,897
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FIGURE 2-1CITY OF THE COLONYWATER BILLING METERS2017 CONSUMPTION
Created by Freese and Nichols, Inc.Job No.: COY17543Location: H:\W_WW_PLANNING\01_DELIVERABLES\00_FINAL_REPORT\02-WASTEWATER\(Figure_2-1)-Water_Billing_Meters_11x17.mxdUpdated: Wednesday, April 3, 2019 2:47:27 PMUser Name: 02499
!I0 3,000
SCALE IN FEET
LEGEND
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27 ac.
25 ac.
17 ac.
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SC-14
WP-4
SC-18
SC-12
SC-15
SC-11
WP-3
WP-2
SC-1
Frisco
Carrollton
Lewisville
Plano
Little Elm
Dallas
Hackberry
HebronMAIN STFM 423S H 1 2 1
F M 5 4 4 TEEL PKWYPLANO PKWY LEGACY DRPARKER RD
KING RD
E HEBR ON PKWY
MARSH LNN C OLONYBLVDMEM OR IA LDR
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DHAVEN PKWYPAIGE RDE ROSEMEADE PKW Y
E S H 1 2 1 B U S BOYDRD
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LEWISVILLE LAKE DAM ROSE LNK ING ARTHURBLVDBAKER DR
FISH HATCHERY RDE HILL PARK RDCHARLES STMIDWAY RD CRIDER RDSTANDRIDGE DRFURNE
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DELWEBBBLVD
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OSAGE PLTITTLE DRDIAMONDPOINTLN
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CHEYENNEDR
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COOKIE LN
LEGEND
LND O W E L L I N G C T
VOYAGER DR
NAVARRO WA Y
W I L D F I R E L N
PAT R I O T D R CANAL STHEADQUARTERSMCCLELLAN DRAUGUS
T
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ROCKWOOD DR
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GLEN HILL DR
SIENNA PL
OVERL A N D D R
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T O W N & C O U N T R Y B L V D
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LINKS DRSAG E RI DGE DR
PALAMEDES STAPRIL H ILL LN
LAKE DISTRICT DR
OAK MOUNT DRREEDER DRKEAN CIRSOMERVILLE DRRUMFORD RDHAMILTON DR
G O L D E N S P U R RIVER TRLTASCATE DRP E R E G R I N E T R L
B L U E R I D G E D R
DELAFORD DR
BOYD RD
MAIN ST
E S H 1 2 1 B U S
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M cWho rterC r e e k
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Created by Freese and Nichols, Inc.Job No.: COY17543Location: H:\W_WW_PLANNING\01_DELIVERABLES\00_FINAL_REPORT\02-WASTEWATER\(Figure_2-2)-Projected_Development_11x17.mxdUpdated: Wednesday, April 3, 2019 2:50:03 PMUser Name: 02499
!I0 3,400
SCALE IN FEET
LEGEND
Projected Development
5-Year Residential
5-Year Commercial
10-Year Residential
10-Year Commercial
Road
Railroad
Stream
Lake
Parcel
USACE Property
The Colony City Limit
ETJ Boundary
Other City Limit
County Boundary
MAJOR BASINS
Indian Creek
Stewart Creek
Wynnwood Peninsula
"m
"m
AACCCCMTTOLL
SRT
AACCCCMTTOLL
S RT
"m
"n
Lake Lewisville DENTON CO.COLLIN CO.DENTON CO.DENTON CO.COLLIN CO.SC-237271,6882,3283,225
IC-21,0372,6102,6107,123
WP-53,6353,6543,6545,187
SC-201,6781,8301,9521,952
SC-91,3941,4901,5671,823
IC-33,2733,5644,5518,394
SC-222,4832,5942,7862,786
IC-11451452,0684,019
SC-212,6243,3013,8453,845
SC-42,0702,1152,1512,320
SC-191,6841,7621,8241,824
WP-12291,4941,4941,494
SC-172,9532,9692,9822,982
SC-51,5941,6391,6751,788 SC-162,1342,1902,2342,234
SC-36477037481,056SC-131,4741,5431,5991,599
SC-2561581596596 SC-101,1211,1721,2121,430
SC-61,1461,1851,2171,217
SC-85,4965,5315,5585,622
SC-7686725756756 SC-149871,0091,0271,152
WP-40494949
SC-18483530568568
SC-12795819839839SC-15531554572572
SC-11547567582658
WP-30000
WP-2155413413413 SC-10101977
Frisco
Carrollton
Lewisville
Plano
Little Elm
Dallas
Hackberry
HebronMAIN STFM 423S H 1 2 1
F M 5 4 4 TEEL PKWYPLANO PKWY LEGACY DRPARKER RD
KING RD
E HEBR ON PKWY
MARSH LNN C O LO NYBLVDMEMORIA L D R
WIN
DHAVEN PKWYPAIGE RDE ROSEMEADE PKW Y
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BOYD RD
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BLVDHONEYBEELN TRINITYDRHIDDENCREEKLNVIRGINIAPINEDREC H O L S DRBRESEE DRDAVIS DRPALACE PL
RALE IGH DR OSAGE PLDIAMONDPOINTLN
DIAMO N D R ID GE DR
CHEYENNEDR ARBORHILLSWAYCOOKIE LN
NEWMAN RD
D O W E L L I N G C T
VOYAGE R DR
NAVARRO WA Y
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S EVILLA DR
CONEYISLA ND DR
PAT R I O T D R CANALSTMCCLELLAN DRAUGUS
T
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PORTER DR
BEACH S T
S IR G A W A IN L NLARIATTRL
LINASTNATIO
N D
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STONEWALL DR HA
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WICK
FRIO WAY
LIMERICK LN
OVERTON ST
PARAGONDRHARBOR SPRINGSDRMORNINGDOVEDRUIDHILLSDR
BRIAR TREE LN
LIVY LNLEWISDRSHERRY LN
CHOCTAW PLREMBRANDT DR
T O W N & C O U N T R Y B L V DHIDDENCOVEPARKKNOTS L N KITE LNR I V E RV I E W D R SHADEWELL STSANDSTONE DR
KURTH DR KE NT S H I RE L NPRESTWICK DRSAFE HARBOR DR
REPUBLIC DR
SCOTT RDKYSER WAYV E R B E N A L N TURNBERRY DRPINEVALLEY DRWINDMILL PTIVY GR EEN R D
ALICE LA BEALE AVE
CANOE WAY
A S P E N L N
DEL MOLIN AVE
CRESTEDGE DRTRAIL VIEW LN
SUN KING LN
CARSON LN
LAKE BLUFF DR
CANE HILL DR
C O L T R D
YA C H T C L U B D R
SIR BEDIVERE LN
D E X T E R L N SOTO LNCARUTH LN
L E G I R O N D R
FLICKER ST
SHADY POINT DRA L CO VE DR
LINKS DRPROSPECT DR
SAG E RI DGE DRWREXHAM STAPRIL H ILL LNREEDER DRSKYLINE DRSOMERVILLE DRRAMBLINGRIDGELNRUMFORD RDKETTLE CREEK DR
MOSS VINE DR
SIR WADE WAY
H A R V A R D LN
G O L D E N S P U R
ALLE GR O D R
P E R E G R I N E T R L
BALL DRMIDWAY RDHW Y 121S
T
O
N
E
B
R
O
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MAIN ST
India n C r eekSte w a r t CreekF urnea
ux
C
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kMidwayBranch
M cWho rterC r e e k
M cWh o r t e rCreekFIGURE 2-3CITY OF THE COLONYPROJECTED POPULATION BYWASTEWATER BASIN
Created by Freese and Nichols, Inc.Job No.: COY17543Location: H:\W_WW_PLANNING\01_DELIVERABLES\00_FINAL_REPORT\02-WASTEWATER\(Figure_2-3)-Pop_Growth_by_Subbasin_11x17.mxdUpdated: Wednesday, April 3, 2019 2:51:26 PMUser Name: 02499
!I
LEGEND
2018 - Buildout Population Growth
Less than 500 People
500 - 1,000 People
Greater than 1,000 People
Major Basin
Indian Creek
Stewart Creek
Wynnwood Peninsula
Road
Railroad
Stream
Lake
Parcel
USACE Property
The Colony City Limit
ETJ Boundary
Other City Limit
County Boundary 0 3,400
SCALE IN FEET
Sub-Basin ID2018 Population (Total 42,292)2023 Population (Total 48,436)2028 Population (Total 53,477)Buildout Population (Total 67,600)
"m
"m
AACCCCMTTOLL
SRT
AACCCCMTTOLL
S RT
"m
"n
Lake Lewisville DENTON CO.COLLIN CO.DENTON CO.DENTON CO.COLLIN CO.IC-2131396115
SC-23296299338364
WP-516181829
IC-300016
IC-15959161169
SC-20159258258258
SC-933333340
SC-22253301301301
SC-21152154154154
SC-410101015
SC-1947474747
WP-10000
SC-177777
SC-516161619 SC-1618182929
SC-311110SC-1350505050
SC-226262626 SC-1088814
SC-634343434
SC-815151517
SC-735353535 SC-140004
WP-42222
SC-1832323232
SC-1213131313SC-1513131313
SC-114446
WP-30686868
WP-22101010 SC-10002
Frisco
Carrollton
Lewisville
Plano
Little Elm
Dallas
Hackberry
HebronMAIN STFM 423S H 1 2 1
F M 5 4 4 TEEL PKWYPLANO PKWY LEGACY DRPARKER RD
KING RD
E HEBR ON PKWY
MARSH LNN C O LO NYBLVDMEMORIA L D R
WIN
DHAVEN PKWYPAIGE RDE ROSEMEADE PKW Y
E S H 1 2 1 B U S
BOYD RD
STON EBROOK PKWYLOBO LNFM 2281LEBANONRD4TH ARMY DRNJOSEYLNMERLINDRLEWISVILLE LAKE DAM ROSE LNK ING ARTHURBLVDBAKER DR
FISH HATCHERY RDE HILL PARK RDCHARLES STMIDWAY RD CRIDER RDSTANDRIDGE DRPOLSER RD
FURNE
A
U
X
LN
RAGANRD
DOZIERRDFOX DR
LAVA CA TR
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H W Y 12 1LONESTARRANCHPKWYPINELNK ELLY B L V D
PROVINCE DRANGEL FALLS DR
H I G H S H O A L S D R
E BRANCH H O L L O W D R
S Q U IR E S D R
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DIAMO N D R ID GE DR
CHEYENNEDR ARBORHILLSWAYCOOKIE LN
NEWMAN RD
D O W E L L I N G C T
VOYAGE R DR
NAVARRO WA Y
W I L D F I R E L N
S EVILLA DR
CONEYISLA ND DR
PAT R I O T D R CANALSTMCCLELLAN DRAUGUS
T
A
D
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T
A
T
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A
N
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N
N
A A
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BEACH S T
S IR G A W A IN L NLARIATTRL
LINASTNATIO
N D
R
STONEWALL DR HA
Y
WICK
FRIO WAY
LIMERICK LN
OVERTON ST
PARAGONDRHARBOR SPRINGSDRMORNINGDOVEDRUIDHILLSDR
BRIAR TREE LN
LIVY LNLEWISDRSHERRY LN
CHOCTAW PLREMBRANDT DR
T O W N & C O U N T R Y B L V DHIDDENCOVEPARKKNOTS L N KITE LNR I V E RV I E W D R SHADEWELL STSANDSTONE DR
KURTH DR KE NT S H I RE L NPRESTWICK DRSAFE HARBOR DR
REPUBLIC DR
SCOTT RDKYSER WAYV E R B E N A L N TURNBERRY DRPINEVALLEY DRWINDMILL PTIVY GR EEN R D
ALICE LA BEALE AVE
CANOE WAY
A S P E N L N
DEL MOLIN AVE
CRESTEDGE DRTRAIL VIEW LN
SUN KING LN
CARSON LN
LAKE BLUFF DR
CANE HILL DR
C O L T R D
YA C H T C L U B D R
SIR BEDIVERE LN
D E X T E R L N SOTO LNCARUTH LN
L E G I R O N D R
FLICKER ST
SHADY POINT DRA L CO VE DR
LINKS DRPROSPECT DR
SAG E RI DGE DRWREXHAM STAPRIL H ILL LNREEDER DRSKYLINE DRSOMERVILLE DRRAMBLINGRIDGELNRUMFORD RDKETTLE CREEK DR
MOSS VINE DR
SIR WADE WAY
H A R V A R D LN
G O L D E N S P U R
ALLE GR O D R
P E R E G R I N E T R L
BALL DRMIDWAY RDHW Y 121S
T
O
N
E
B
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O
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KPKWY LEGACY DRMAIN ST
E S H 1 2 1 B U S
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India n C r eekSte w a r t CreekF urnea
ux
C
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kMidwayBranch
M cWho rterC r e e k
M cWh o r t e rCreekFIGURE 2-4CITY OF THE COLONYPROJECTED NON-RESIDENTIAL ACREAGEBY WASTEWATER BASIN
Created by Freese and Nichols, Inc.Job No.: COY17543Location: H:\W_WW_PLANNING\01_DELIVERABLES\00_FINAL_REPORT\02-WASTEWATER\(Figure_2-4)-NonResAcres_Growth_by_Subbasin_11x17.mxdUpdated: Wednesday, April 3, 2019 2:52:08 PMUser Name: 02499
!I
LEGEND
2018 - Buildout Non-Residential Acreage
Less than 25 Acres
25 - 50 Acres
Greater than 50 Acres
Major Basin
Indian Creek
Stewart Creek
Wynnwood Peninsula
Road
Railroad
Stream
Lake
Parcel
USACE Property
The Colony City Limit
ETJ Boundary
Other City Limit
County Boundary 0 3,400
SCALE IN FEET
Sub-Basin ID2018 Non-Residential Acreage (Total 1,314)2023 Non-Residential Acreage (Total 1,544)2028 Non-Residential Acreage (Total 1,779)Buildout Non-Residential Acreage (Total 1,897)
Wastewater Master Plan Update
City of The Colony
2-8
2.3 WASTEWATER PROJECTIONS
Table 2-4 summarizes the City’s population and historical average daily wastewater flows recorded at the
WWTP. Since 2011, the average daily wastewater flow to the WWTP has been 2.78 MGD which correlates
to an average system-wide per-capita flow of 72 gallons per capita per day (gpcd), including residential
and non-residential contributions. An overall system per capita flow of 72 gpcd is a comparatively low
system-wide per capita which is a good indication of the relatively newer age of the infrastructure, and
also the City’s proactive approach to managing I/I within the collection system.
Table 2-4: Historical WWTP Flows
Year Population
Average Annual
Daily Flow
(MGD)
Average Annual
Daily Flow (1)
(gpcd)
2011 36,230 2.59 71
2012 36,590 2.72 74
2013 37,510 2.76 74
2014 38,730 2.88 74
2015 39,310 2.83 72
2016 39,810 2.72 68
2017 41,160 2.94 71
Average 2.78 72
Maximum 2.94 74
(1) Average Annual System-Wide Flow Factor includes residential and
non-residential flow contributions
In this Master Plan Update, wastewater flows for the sewer service areas were updated based on revised
residential flow factors (gpcd) and commercial wastewater flow rates (gallons per acre per day - gpad).
The City provided recent flow monitoring data for the Austin Ranch Lift Station. Since the Austin Ranch
Lift Station collects flow for the entire Indian Creek sewer basin, this data was used in conjunction with
existing land use information to estimate residential and commercial flow rates in the basin. For the Indian
Creek Basin (flowing to Austin Ranch lift station), residential flow rates were estimated at 82 gpcd and
commercial flow rates were estimated to be 950 gpad. Since flow monitoring data was not available for
the Wynnwood Peninsula and Stewart Creek Basins, residential and commercial flow rates were
estimated using existing land use information in conjunction with historical WWTP flow data and water
billing information. For the Stewart Creek and Wynnwood Peninsula Basins, residential flow rates were
estimated at 65 gpcd and commercial flow rates were estimated to be 450 gpad.
Wastewater Master Plan Update
City of The Colony
2-9
Average dry weather flows were projected based on population projections, development area, and
estimated gpcd values for each sewer basin. A 2.5 peaking factor was applied to the average dry weather
flow rates to determine peak dry weather flow rates for each sub-basin. Peak wet weather flow was
calculated for each sub-basin by adding peak I/I contribution to the peak dry weather flow. Peak I/I
contribution was calculated by applying a flow per acreage to the total developed area (residential and
commercial) of each sub-basin. The Colony currently experiences minimal infiltration and inflow (I/I), but
I/I is generally expected to increase in the future as system infrastructure ages. To account for aging
system infrastructure and corresponding increases in I/I, the estimated I/I factor was increased from 850
gpad in the existing system (2018) to 900 gpad for the 2023 and 2028 planning years, and to 1,000 gpad
for Buildout.
A summary of the updated flow projections is presented in Table 2-5. The complete flow projection tables
including populations and land use by sub-basin are provided in Appendix A. Figure 2-5 graphically
illustrates historical and projected population and flow data.
Wastewater Master Plan Update
City of The Colony
2-10
Table 2-5: Wastewater Flow Projection Summary
Year Population
Wynnwood Peninsula Stewart Creek Indian Creek TOTAL
Average
Dry
Weather
Flow
(MGD)
Peak
Dry
Weather
Flow
(MGD)
Peak
Wet
Weather
Flow
(MGD)
Average
Dry
Weather
Flow
(MGD)
Peak
Dry
Weather
Flow
(MGD)
Peak
Wet
Weather
Flow
(MGD)
Average
Dry
Weather
Flow
(MGD)
Peak
Dry
Weather
Flow
(MGD)
Peak
Wet
Weather
Flow
(MGD)
Average
Dry
Weather
Flow
(MGD)
Peak
Dry
Weather
Flow
(MGD)
Peak
Wet
Weather
Flow
(MGD)
Average
Annual
Daily
Flow
(gpcd)
2018 42,292 0.27 0.68 1.06 2.75 6.87 9.72 0.44 1.10 1.40 3.46 8.64 12.18 82
2023 48,436 0.41 1.02 1.72 3.02 7.54 11.35 0.59 1.48 1.89 4.02 10.05 14.97 83
2028 53,477 0.41 1.02 1.72 3.18 7.94 12.61 1.01 2.53 3.26 4.60 11.49 17.58 86
Build-
out 67,600 0.51 1.28 2.11 3.36 8.39 13.83 1.91 4.76 5.74 5.77 14.44 21.68 85
Figure 2-5: Historical and Projected Population and Flow
0.0
5.0
10.0
15.0
20.0
25.0
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
Wastewater Flow (MGD)PopulationAverage Annual Daily Flow Peak Wet Weather Flow
Average Dry Weather Flow Population
Wastewater Master Plan Update
City of The Colony
3-1
3.0 WASTEWATER SYSTEM OVERVIEW AND HYDRAULIC ANALYSIS
3.1 WASTEWATER SYSTEM AND SERVICE AREA
The City’s wastewater system consists of approximately 206 miles of wastewater lines ranging in diameter
from three inches to 36 inches. The majority of the system is com prised of 8-inch and smaller diameter
lines. Figure 3-1 graphically summarizes the wastewater system by pipe size. The City operates 15 lift
stations to overcome topography, transfer flow between basins, and ultimately convey flows to the
WWTP.
Figure 3-1 Wastewater System Diameter Summary
The service area for the City of The Colony’s wastewater system includes an area of approximately 11
square miles generally bounded by the city limits. The City has three wastewater basins: Wynnwood
Peninsula in the north, Stewart Creek in the central area, and Indian Creek in the area generally south of
Highway 121. Flow from the basins is conveyed to the City’s Wastewater Treatment Plant (WWTP),
located in the Stewart Creek basin, through a system of gravity wastewater lines, lift stations, and force
mains. Figure 3-2 illustrates the City’s wastewater service area and depicts the three sewer basins. A map
of the City’s existing wastewater system is shown on Figure 3-3.
8.0%
0.2%
5.7%
29.5%
36.4%
7.0%
3.7%
2.4%1.6%2.7%
0.3%0.9%0.2%0.9%0.3%0.1%
0%
5%
10%
15%
20%
25%
30%
35%
40%Percentage (By Length)Diameter (inches)
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M cWho rterC r e e k
M cWh o r t e rCreekFIGURE 3-2CITY OF THE COLONYWASTEWATER SERVICE AREA
Created by Freese and Nichols, Inc.Job No.: COY17543Location: H:\W_WW_PLANNING\01_DELIVERABLES\00_FINAL_REPORT\02-WASTEWATER\(Figure_3-2)-Wastewater_Service_Area_11x17.mxdUpdated: Tuesday, April 16, 2019 12:58:08 PMUser Name: 02499
!I0 3,400
SCALE IN FEET
LEGEND
WastewaterService Area
Road
Railroad
Stream
Lake
Parcel
USACE Property
The Colony City Limit
ETJ Boundary
Other City Limit
County Boundary MAJOR BASINS
Indian Creek
Stewart Creek
Wynnwood Peninsula
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Lake Lewisville DENTON CO.COLLIN CO.DENTON CO.DENTON CO.COLLIN CO.The Colony WWTPExisting Capacity: 3.8 MGD
IolaLift Station
B.B. OwensLift Station
EastvaleLift Station
Water EdgeLift Station
CottonwoodLift Station
WynnwoodLift StationExisting Capacity: 1.9 MGD
MasterLift Station 1Existing Capacity: 10.0 MGD
RidgepointLift Station
Old Oak PondOffice Lift Station
Austin RanchLift StationExisting Capacity: 2.7 MGD
Stewart CreekLift Stations
TributeLift Station
2 1"10"18"24"
15"12"27"36"30"1 2 "12"27"15"10"10"1
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Little Elm
Hackberry
Hebron 8"6"
4"6"6"8"8"
8
"
6"
8 "
8
"8"
8"
6"
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6 "
6"
8"6"8"8"6"
8"8"8 "
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8"8"8"8 "
6"
8"
8"8"4"8"8"8
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8"6"
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6"8"8"6"8"6"
8"8"8"8"
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8"8"8"8"8"6"6"8"8"4"
8
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8"
8"8"8 "8"8"8"8"
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FIGURE 3-3CITY OF THE COLONYEXISTING WASTEWATER SYSTEM
Created by Freese and Nichols, Inc.Job No.: COY17543Location: H:\W_WW_PLANNING\01_DELIVERABLES\00_FINAL_REPORT\02-WASTEWATER\(Figure_3-3)_Existing_Wastewater_System_11x17.mxdUpdated: Wednesday, April 24, 2019 4:52:54 PMUser Name: 02499
!I0 3,000
SCALE IN FEET
MAJOR BASINS
Indian Creek
Stewart Creek
Wynnwood Peninsula
LEGENDVäLift Station
TXWWTP Wastewater Treatment Plant
8" and Smaller Wastewater Line
10" and Larger Wastewater Line
Force Main
Road
Railroad
Stream
Lake
Parcel
USACE Property
ETJ Boundary
The Colony City Limit
Other City Limit
County Boundary
Wastewater Master Plan Update
City of The Colony
4-1
4.0 HYDRAULIC ANALYSIS
4.1 GIS AND WASTEWATER MODEL UPDATE
As part of this Wastewater Master Plan Update, FNI reviewed and digitized wastewater infrastructure
from recent development plans. A map of the existing 2018 wastewater system is shown on Figure 4-1.
Recently constructed lines, which have been updated in the City’s GIS data, are shown highlighted in red
on the map.
The City’s previous wastewater model was built in H20Map Sewer software by Innovyze®. Due to the fact
that the H20Map Sewer software is no longer supported, FNI upgraded the City’s previous H20Map Sewer
model to InfoSewer by Innovyze®. FNI also updated the model to include recent infrastructure
improvements and revised flow projections.
A skeletonized version of the City’s wastewater system, generally including gravity lines 10-inches and
larger and five key lift stations and force mains, was modeled. A skeletonized model is used to evaluate
critical infrastructure in the collection system, although the majority of the system (by length) is comprised
of smaller diameter lines. Figure 4-2 illustrates the wastewater lines that were modeled during the current
Wastewater Master Plan Update compared to the existing GIS database.
A steady-state analysis under peak wet weather flow conditions was performed for each planning period
scenario: 2018 (Existing), 2023, 2028, and Buildout to verify that recommended improvements are
appropriately sized. Figure 4-3 illustrates the ratio of flow depth to diameter results for Buildout
conditions. The ratio of flow depth to diameter was 0.9 or less for nearly all Buildout pipes, except for a
few isolated segments. Limited surcharging into the adjacent manholes was noted, but at each location
there was sufficient clearance (9 feet or greater) to the manhole rim that no sanitary sewer overflows
were predicted. Upon closer evaluation, the isolated segments flowing full or nearly full did not indicate
a problem and did not justify new CIP projects. Overall, no additional line improvements were identified
due to current flow projections and flow distribution.
The updated 2018 Wastewater Capital Improvement Plan (CIP) has three planning periods: 2018 to 2023,
2023 to 2028, and 2028 to Buildout. The 5-year planning period (2018-2023) includes six projects. The
new 20-inch Austin Ranch Force Main project and upgrades to the Austin Ranch Lift Station pumps will
expand capacity in the Austin Ranch area to serve future growth. A dewatering upgrade project at the
WWTP is also included in the short-term phase. Extending the collection system to serve the northeast
Wastewater Master Plan Update
City of The Colony
4-2
area of Wynnwood Peninsula (Wynnwood Peninsula Sewer Basin 3, “WP-3”) is included to serve future
expected growth. Upsizing a portion of gravity sewer along Curry Road is needed to eliminate an existing
capacity bottleneck in the system. Finally, an additional gravity sewer extension to serve an area in Austin
Ranch east of the railroad tracks (Indian Creek Sewer Basin 3, IC-3) is included to serve future projected
growth.
The 10-year planning period (2023-2028) includes four projects. An extension of gravity sewer to serve
development in the Austin Ranch area, west of Plano Parkway is needed due to future projected growth.
A parallel 12-inch force main from the Austin Ranch Lift Station will connect to the proposed 20-inch
Austin Ranch force main (Project 1). The parallel 12-inch force main will expand capacity of the Austin
Ranch Lift Station needed to convey future projected flows. Rehabilitation of the Wynnwood Lift Station
is also included to extend the life of the asset. Finally, capacity expansion at the WWTP will be required
to treat future projected flows.
The long-term planning period (2028-Buildout) includes three projects to serve existing and future growth
on the Wynnwood Peninsula.
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Lake Lewisville DENTON CO.COLLIN CO.DENTON CO.DENTON CO.COLLIN CO.The Colony WWTPExisting Capacity: 3.8 MGD
IolaLift Station
B.B. OwensLift Station
EastvaleLift Station
Water EdgeLift Station
CottonwoodLift Station
WynnwoodLift StationExisting Capacity: 1.9 MGD
MasterLift Station 1Existing Capacity: 10.0 MGD
RidgepointLift Station
Old Oak PondOffice Lift Station
Austin RanchLift StationExisting Capacity: 2.7 MGD
TributeLift Station
Stewart CreekLift Stations
8"10"15"12"
4 "
1
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ARDRIFT AVE
RED WOLF LNHACK BERRY CREEK PARK R D
STRAIT LNS IR G A W AINLNCONCORDLN
MIRAVISTA DRLA
R
IA
TTRLAMETHYST LNBO N SAIDRF E A T H E R I N G D R
FRIO WAY
LIMERICK LN
ROUNDT A BLE BLV
DPARAGONDRHARBOR S PRINGSDRDRUIDHILLSDR
MEADOW DRBRIAR TREE LN
ROCKWOOD DR
LI
VYLNDURANGODRKINCAID LNB
E
T
H
P
A
G
E
L
O
O
P
A L IS T E R L N
T O PA Z D R
SA D IE S T
WELLESLEY AVE
T O W N & C O U N T R Y B L V D
H ID D EN COVEP ARK
LINDSAYGDNSCABAZON DRKITE LNJOSEPH IN E STMAPLE DRWHISPERINGLAKEDRSANDSTONE DR
BAY HILL DR
CHEETAH TRLKENTSH I RE LN
SAFE HARBOR DR
REPUBLIC DR
PINEHU
RST DR
VERBE N A L NFIDDLERSGREENRD
ARBOR VISTA DRTURNBERRY DRDAYLIGHT DR
IVY GR EEN R D
CANOE WAY CROWN FOREST DRKADIN LN
TRAIL VIEW LNKINGS VIEW DRCOTLEY DR
BLACKOAKDR
CAN E HILL DR
C O LT R D
YA C H T C L U B D R
C
Y
P
R
E
S
S
P
T
DRY CA NYON DR
SIR BEDIVERE LN
CARUTH LN
L E G I R O N D R
S
A
G
E
M
O
N
T D
R LINKS DRPROSPECT DR
REEDER DRSOMERVILLE DRKETTLE CREEK DR
IV Y D RKINGSLEY LNCLEARFORK TRL
H A R V A R D LN
TUMBLING RIVER DR
G O L D E N S P U R
L U N A V IS T A L N
BALFOUR CTBAIRD ST
MORDRED LNSHIRLEY CT
HW Y 121LEGACY DRE S H 1 2 1 B U S
STONEBROOK PKWY
MIDWAY RDLEBA N O NRD16" F.M.12" F.M.6" F.M.12" F.M.
Frisco
Carrollton
Lewisville
Plano
Little Elm
Hackberry
Hebron 8"6"
4 "
8"8"6"
8
"8"6"8"8"8"6"8
"
6"8"6"8"8"6"8"8"8"8"8 "
8"6"8"8"
8"
8"
8"
6 "8"8"6"
6"
6"
6"8"6"
4"
6"
6"8"8 "8"6"
8"6"8"8"8"8 "8"
8"
6 "
8"8"8"
6"
6"6"
6"
6"8"8"6"8"6"6"8"8"6 "
8 "
8"
8 "
8"6"6"6"6"8"8"6"
6"6"8"
8"8"8"8"8"8"8"8"8"8"
6"
8"8"India n C r e ekS t e w a rtCreekM cWh o r t e r CreekMidwa yBranch
FIGURE 4-1CITY OF THE COLONYUPDATED EXISTING WASTEWATER SYSTEM
Created by Freese and Nichols, Inc.Job No.: COY17543Location: H:\W_WW_PLANNING\01_DELIVERABLES\00_FINAL_REPORT\02-WASTEWATER\(Figure_4-1)_Updated_Existing_Wastewater_System_11x17.mxdUpdated: Wednesday, April 24, 2019 4:41:05 PMUser Name: 02499
!I
LEGENDVäLift Station
TXWWTP Wastewater Treatment Plant
8" and Smaller Wastewater Line
10" and Larger Wastewater Line
Force Main
FNI Added Line
Road
Railroad
Stream
Lake
Parcel
USACE Property
ETJ Boundary
The Colony City Limit
Other City Limit
County Boundary
0 3,000
SCALE IN FEET
MAJOR BASINS
Indian Creek
Stewart Creek
Wynnwood Peninsula
Vä
Vä
Vä
Vä
Vä
Vä
Vä
Vä
Vä
Vä
Vä
VäVäVä
Vä
Vä
TXWWTP
"m
"m
AACCCCMTTOLL
S RT
AACCCCMTTOLL
SRT
"m
"n
Lake Lewisville DENTON CO.COLLIN CO.DENTON CO.DENTON CO.COLLIN CO.The Colony WWTPExisting Capacity: 3.8 MGD
IolaLift Station
B.B. OwensLift Station
EastvaleLift Station
Water EdgeLift Station
CottonwoodLift Station
WynnwoodLift StationExisting Capacity: 1.9 MGD
MasterLift Station 1Existing Capacity: 10.0 MGD
RidgepointLift Station
Old Oak PondOffice Lift Station
Austin RanchLift StationExisting Capacity: 2.7 MGD
Stewart CreekLift Stations
TributeLift Station
10"15"12"
1
8
"36"18"18"
15"15"10"10"
12"15"12"10"
2 1"10"18"24"
15"12"27"30"10"10"12"12"
27"12"12"10"1
0
"
10"
1
8
"10"10"18"15"12"1
0
"
1
8
"18"10 "12"10"
10"15"1 0 "27"15"10"12"18"12"1
0
"10"1 8 "12"10"10"12"12"21"10"10"10"
15"
15"
12"12"10"
10"
18 "
12"
21"18"1 8 "10"12"10"12"10"16" F.M.12" F.M.6" F.M.16" F.M.12" F.M.MAIN STFM 423FM 5 44
PLANO PKWY
PARKER RD
E H EBRON PKWY
S H 1 2 1
N C O L O N Y BLVDLEGACY DRTEEL PKWYW IN D H AVENPKW Y
M E M O R IALDRPAIGE RDMARSH LNSTONEBROOK PKWY
FM 2281LEBANON RD 4TH ARMY DRN JOSEY LNBLAI
ROAKSDR
E S H 1 2 1 B U S
MERLIN DRS CO LONYBLVD
NA SH DR
K IN GARTHURBLVDBAKER DRROSE LNE HILL PARK RDMIDWAY RD
CHARLES STCRIDER RDSTANDRIDGE DRPOLSER RDFISH HATCHERY RDRAGANRD
D
O
ZI
E
R
RDLAVACA TR
LEWISVILLE LAKE DAM
TIMB ER RIDGE DR
H W Y 1 21LONESTARRANCHPKWYANGELFALLSDR
H I G H S H O A L S D R
WITT RD
S Q U IR E S D ROXFORDWLEBANONRD
NORRIS DR
MARE RD
LAKERIDGE RDWSTONE B R O O K PKWY
AVALONDRE B RANC H H O L L O W DR
COTTON GIN RD
FLOWERS DR AVERY LN
CITATION CT
NLEORA LN TWIN FALLS DRL ILA CLNARBORCREEKDRG RE ENVIEWDR SPRINGCREEKPKWYBA N KSIDEETHRIDGE DRRICE DR
LADY OFTHELAKE
BLVD
F
RIS
COLA KESDRM
ARSHR
I
D
G
E
R
DG L E N VIE W LN
I D L E W I L D D R
STONEBRIAR DR
L
A
C
O
S
TADRCOM
P
ASSDROLD
G
ATERDADAMS DR
LIAM DR
ELMSTMEDICAL PKWYSTEINBECK STOAKLAND H I L L S L N
CL
EARWATER TR
DELWEBBBLVD
HIDA L G OLN
CO L U M BIN E W Y TEXAS DRWILCOX DRC R O W NPARK L N
RO C KCREEKPKWYCEDARRANCHRD
PARK RIDGE PLRAWLINS LNSHER M A N DR TRAILSIDE DRBILTMOOREDRE
S
S
E
X B
L
V
DHONEYBEELN
PE A RCESTHIDDENCREEKLN
JOY DRE C H O LS DRBRESEE DRLOBOLNDAVISDR
PROVINCE DRLOM A R DR OSAGE PLH I G H P OINTDRDIAMONDPOINTLN
B RI AR RIDGELN
FURNEAUX LNL A D Y B A N K
DIAMO N D R ID GE D R
CHEYENNEDR
COOKIE LN
LEGEN
D
LNNEWMAN RD
INDIAN TRLDOW E L L IN G C T
VOYAGE R DR
NAVARRO WAY
SEVILLA D R
CONEYISLAN D D R
PAT R I O T D R CANALSTINTERN
A
TIONALPKWYELLIOT CTRUSSELL DRPITKINRD
MESADRDOVER DREREC DRL O N G V U E D ROTIS DRPARADE DR
DEERWOOD LNH E A R T H S T O N E D R
O CEAN SPRAY D R
HIGHCO UNTRYD R
S
T
ARDRIFT AVE
RED WOLF LNHACK BERRY CREEK PARK R D
STRAIT LNS IR G A W AINLNCONCORDLNLA
R
IA
TTRLAMETHYST LNBO N SAIDRF E A T H E R I N G D R
APACHEDRFRIO WAY
LIMERICK LN
ROUNDT A BLE BLV
DPARAGONDRHARBOR S PRINGSDRDRUIDHILLSDR
MEADOW DRBRIAR TREE LN
ROCKWOOD DR
LI
VYLNDURANGODRKINCAID LNB
E
T
H
P
A
G
E
L
O
O
P
A L IS T E R L N
T O PA Z D R
SA D IE S T
WELLESLEY AVE
T O W N & C O U N T R Y B L V D
H ID D EN COVEP ARK
CABAZON DRKITE LNJOSEPH IN E STMAPLE DRWHISPERINGLAKEDRSANDSTONE DR
BAY HILL DR
CHEETAH TRLKENTSH I RE LN
SAFE HARBOR DR
REPUBLIC DR
PINEHU
RST DR
VERBE N A L NFIDDLERSGREENRD
ARBOR VISTA DRTURNBERRY DRDAYLIGHT DR
IVY GR EEN R D
CANOE WAY CROWN FOREST DRKADIN LN
TRAIL VIEW LNKINGS VIEW DRCOTLEY DR
BLACKOAKDR
CAN E HILL DR
C O LT R DTRAMOREYACHT C L U B D R
C
Y
P
R
E
S
S
P
T
DRY CA NYON DR
SIR BEDIVERE LN
CARUTH LN
L E G I R O N D R
S
A
G
E
M
O
N
T D
R LINKS DRSTAGS LEAP DRPROSPECT DR
REEDER DRSOMERVILLE DRKETTLE CREEK DR
IV Y D RKINGSLEY LNCLEARFORK TRL
H A R V A R D LN
TUMBLING RIVER DR
G O L D E N S P U R
L U N A V IS T A L N
BALFOUR CTBAIRD ST
EDEN
MORDRED LNSHIRLEY CT
LEGACY DRHW Y 121STONEBROOK PKWY
LEBA N O NRDMIDWAY RDE S H 1 2 1 B U S
Frisco
Carrollton
Lewisville
Plano
Little Elm
Hackberry
Hebron 8"6"8"8"8
"8"8"8"8"
8"
8"8"8"8"
8"8"8 "8"8"8"8"8"8"6"
4"8"6 "
6"6"8
"8"8"8"4"6"8"6"8"8"6"6"8"6 "
6"6"6"6"8"8"8"
8"
8"8"6"
4"
6 "
6"
8 "
6"8"6"
8"
6"8"8 "8"8"8 "6"6"6"8"8"8"6"8"8 "
8"8"8"8"
8
"
8"
6"
6 "6"8"8"6"8"6"8"6"8"8"8"8"8"6"8"6"8"8"8"8 "6"
8"
8"
8 "8"8"
8"8"8"8"8"6"8"8"8"India n C r e ekS t e w a rtCreekM cWh o r t e r CreekMidwa yBranch
FIGURE 4-2CITY OF THE COLONYMODELED WASTEWATER SYSTEM
Created by Freese and Nichols, Inc.Job No.: COY17543Location: H:\W_WW_PLANNING\01_DELIVERABLES\00_FINAL_REPORT\02-WASTEWATER\(Figure_4-2)_Modeled_Wastewater_System_11x17.mxdUpdated: Wednesday, April 24, 2019 4:44:01 PMUser Name: 02499
!I0 3,000
SCALE IN FEET
MAJOR BASINS
Indian Creek
Stewart Creek
Wynnwood Peninsula
LEGENDVäLift Station
TXWWTP Wastewater Treatment Plant
Modeled Line
8" and Smaller Wastewater Line
10" and Larger Wastewater Line
Force Main
Road
Railroad
Stream
Lake
Parcel
USACE Property
ETJ Boundary
The Colony City Limit
Other City Limit
County Boundary
Vä
Vä
Vä Vä
Vä
Vä
Vä
Vä
Vä
Vä
Vä
Vä
Vä
Vä
Vä
Vä
Vä
VäVäVä
Vä
Vä
TXWWTP 30"
"m
"m
AACCCCMTTOLL
S RT
AACCCCMTTOLL
SRT
"m
"n
Lake Lewisville DENTON CO.COLLIN CO.DENTON CO.DENTON CO.COLLIN CO.Stewart CreekLift Stations
TributeLift Station
The Colony WWTPCapacity: 6.1 MGD
IolaLift Station
B.B. OwensLift Station
EastvaleLift Station
Water EdgeLift Station
CottonwoodLift Station
WynnwoodLift StationCapacity: 2.5 MGD
MasterLift Station 1Capacity: 10.0 MGD
RidgepointLift Station Old Oak PondOffice Lift Station(Abandoned)
Austin RanchLift StationCapacity: 5.8 MGD
4" F.M.
4" F.M.
Proposed Buildout LSCapacity: 0.1 MGD
Proposed 2023 LSCapacity: 0.1 MGD
Proposed 2028 LSCapacity: 0.1 MGD
Proposed 2028 LSCapacity: 0.1 MGD
20" F.M.
4" F.M.4" F.M.27"4" F.M.20" F.M.20" F.M.20" F.M.12" F.M.12" F.M.10"1 0 "10"15"12"
1
8
"36"18 "
12"15"10"15"30"2 1 "10"18"15"12"27"30"18"10"15"10"1 0 "
10"12"27"12"10"1 8 "
1
0
"10
"18"15"10"1
5
"10"10"10"12"10"10"10"
10"27"1 8 "18"18"27"12"15"12"10"
10"10"12"12"
15"
10"
12"12"1
0
"10"10"1
5
"12"21"
10"18"18"18"
2 1"1
0
"10"10"18 "
10"
15"10"12"12"12"10"MAIN STFM 423FM 5 44
PLANO PKWY
PARKER RD
E H EBRON PKWY
S H 1 2 1
N CO L O N Y BLVD LEGACY DRTEEL PKWYWINDHAVEN P KWYMEMORIALDRPAIGE RDMARSH LNSTONEBROOK PKWY
FM 2281LEBANON RD 4TH ARMY DRN JOSEY LNBLAI
ROAKSDR
E S H 1 2 1 B U S
MERLIN DRS COL ONYBLVD
NASH DR
K IN GARTHURBLVDBAKER DRROSE LNE HILL PARK RDMIDWAY RD
CHARLES STCRIDER RDSTANDRIDGE DRPOLSER RDFISH HATCHERY RDRAGANRD
D
O
ZI
E
R
RDF RYERSTLAVACA TR
LEWISVILLE LAKE DAM
TIMB ER RIDGE DR
H W Y 1 21LONESTARRANCHPKWYANGELFALLSDR
H I G H S H O A L S D R
KEYSDR
WITT RD
OXFORDNORRIS DR
MARE RD
LAKERIDGE RDWSTONE B R O O K PKWY
AVALONDRE B RANC H H O L L O W DR
COTTON GIN RD
FLOWERS DR AVERY LN
CITATION CT
MCKAMY TRL
NLEORA LN TWIN FALLS DRL ILA CLNARBORCREEKDRG RE ENVIEWDR SPRINGCREEKPKWYREED D R
BA N KSIDEROBERTS DR
ETHRIDGE DRRICE DR
LADY OFTHELAKE
BLVD
F
RIS
COLA KESDRM
ARSHR
I
D
G
E
R
DW AV E R L Y
I D L E W I L D D R
STONEBRIAR DR
L
A
C
O
S
TADRCOM
P
ASSDROLD
GATERDADAMS DR
LIAM DR
ELMSTMEDICAL PKWYSTEINBECK STOAKLAND H I L L S L N
CL
EARWATER TR
DELWEBBBLVD
HIDA L G OLN
CO L U M BIN E W Y TEXAS DRWILCOX DRC R O W NPARK L N
RO C KCREEKPKWYCEDARRANCHRD
PARK RIDGE PLRAWLINS LNTRAILSIDE DRBILTMOOREDRPRUIT T DR
E
S
S
E
X B
L
V
DHONEYBEELN TRINITYDRPE A RCESTHIDDENCREEKLNECHOLSDR
BRESEE DRLOBOLNDAVISDR
PROVINCE DRLOM A R DR OSAGE PLTITTLE DRH I G H P OINTDRDIAMONDPOINTLN
B RI AR RIDGELN
FURNEAUX LNDIAMO N D R ID GE D R
CHEYENNEDR
COOKIE LN
LEGEN
D
LNNEWMAN RD
INDIAN TRLDOW E L L IN G C T
VOYAGE R DR
NAVARRO WAY
SEVILLA D R
CONEYISLAN D D R
PAT R I O T D R CANALSTINTERN
A
TIONALPKWYELLIOT CTPITKINRDMESADRDOVER DRWINEHARTSTEREC DRL O N G V U E D ROTIS DRPARADE DR
DEERWOOD LNH E A R T H S T O N E D R
O CEAN SPRAY D R
HIGHCO UNTRYD R
S
T
ARDRIFT AVE
RED WOLF LNHACK BERRY CREEK PARK R D
STRAIT LNS IR G A W AINLNCONCORDLNLA
R
IA
TTRLAMETHYST LNBO N SAIDRNATIO
N D
R
F E A T H E R I N G D R
APACHEDRFRIO WAY
LIMERICK LN
ROUNDT A BLE BLV
DPARAGONDRHARBOR S PRINGSDRDRUIDHILLSDR
MEADOW DRHIGHWOOD TRLBRIAR TREE LN
ROCKWOOD DR
LI
VYLNKINCAID LNB
E
T
H
P
A
G
E
L
O
O
P
A LIS T E R LN
T O PA Z D R
SA D IE S T
WELLESLEY AVE
T O W N & C O U N T R Y B L V D
H ID D EN COVEP ARK
LINDSAYGDNSCABAZON DRKITE LNJOSEPH IN E ST
SANDSTONE DR
BAY HILL DR
CHEETAH TRLKENTSH I RE LN
SAFE HARBOR DR
REPUBLIC DR
PINEHU
RST DR
VERBE N A L NFIDDLERSGREENRD
ARBOR VISTA DRTURNBERRY DRDAYLIGHT DR
IVY GR EEN R D
CANOE WAY
TRAIL VIEW LNKINGS VIEW DRCOTLEY DR
BLACKOAKDR
CAN E HILL DR
C O LT R DTRAMOREYACHT C L U B D R
C
Y
P
R
E
S
S
P
T
DRY CA NYON DR
SIR BEDIVERE LN
CARUTH LN
L E G I R O N D R
S
A
G
E
M
O
N
T D
R LINKS DRPROSPECT DR
REEDER DRSOMERVILLE DRIV Y D RKINGSLEY LNCLEARFORK TRL
H A R V A R D LN
TUMBLING RIVER DR
G O L D E N S P U R
L U N A V IS T A L N
BALFOUR CTBAIRD ST
MORDRED LNSHIRLEY CT
STONEBROOK PKWY
LEBANON RD
MIDWAY RDE S H 1 2 1 B U S HW Y 121LEGACY DR16'' F.M.16" F.M.20" F.M.8"6"8"
8"8"8"
8"8"8"
8"8"8"8"6"
6"
8"
8 "
8"
8"
8"
8"
8"
8"
6"
4"8"8"
6"6"6 "
8"8"8"
8"6"8"6 "
6"
6
"8"8"8"8"4"8 "6"6"
8 "
8"
8
"
6"
8 "8"
6"8"8"6"8"8"8"8"8"8"6"6
"
6"
8 "6"8"6"8"8"6"8"8"8"6"6"
8"
8"
8"6"8"6"8"8"8"8"8"6"6 "8"6"
6"
6"
8"
6"6"8 "6"8"8"8"6"
8"
6"6"6"
8"6"6"6"8
"
8
"6"8"
8 "8"8"
8
"8"8"8"8"India n C r e ekS t e w a rtCreekM cWh o r t e r CreekMidwa yBranch
Frisco
Carrollton
Lewisville
Plano
Little Elm
Hackberry
Hebron
FIGURE 4-3CITY OF THE COLONYBUILDOUT FLOW DEPTHTO DIAMETER RESULTS
Created by Freese and Nichols, Inc.Job No.: COY17543Location: H:\W_WW_PLANNING\01_DELIVERABLES\00_FINAL_REPORT\02-WASTEWATER\(Figure_4-3)_Buildout_Flow_d_D_Results_11x17.mxdUpdated: Wednesday, April 24, 2019 4:50:49 PMUser Name: 02499
!I
LEGENDVäLift Station
TXWWTP Wastewater Treatment Plant
8" and Smaller Wastewater Line
10" and Larger Wastewater Line
Force Main
Road
Railroad
Stream
Lake
Parcel
USACE Property
ETJ Boundary
The Colony City Limit
Other City Limit
County Boundary 0 3,000
SCALE IN FEET
MAJOR BASINS
Indian Creek
Stewart Creek
Wynnwood Peninsula
DEPTH TODIAMETER RATIO
0.5 - 0.9
Greater than 0.9
NOTE: All Lift Station Capacities shown are Proposed Buildout Capacities
Wastewater Master Plan Update
City of The Colony
4-6
4.2 WASTEWATER TREATMENT PLANT CAPACITY EVALUATION
The City of The Colony operates a wastewater treatment plant located near the intersection of Main Street
and East Lake Highlands Drive. The wastewater treatment plant receives and treats all flow from each of
the wastewater basins: Wynnwood Peninsula, Stewart Creek, and Indian Creek.
The existing 2018 average day capacity of the City’s WWTP is 3.8 MGD. A capacity expansion project at
the WWTP is currently underway and expected to be completed in 2019. The 2019 upgrade will increase
the WWTP’s average day capacity to 4.5 MGD, with the ability to treat a peak two-hour flow of 15.75
MGD.
The projected average dry weather flow for 2028 is 4.6 MGD. Therefore, additional capacity at the WWTP
will be required by 2028. CIP Project 10 is a proposed expansion of 1.6 MGD, bringing total average day
capacity to 6.1 MGD. This proposed expansion will satisfy WWTP capacity needs through Buildout
conditions. Figure 4-4 summarizes the proposed WWTP expansions compared to projected wastewater
flows.
Wastewater Master Plan Update
City of The Colony
4-7
Figure 4-4: WWTP Capacity and Projected Wastewater Flows
3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
20182019202020212022202320242025202620272028202920302031203220332034203520362037203820392040MGDAverage Day Dry Weather Flow WWTP Capacity 75% Treatment Capacity 90% Treatment Capacity
2019 Expansion (In Progress)= 0.7 MGD
Existing Capacity= 3.8 MGD
TOTAL Capacity= 4.5 MGD
2025 Prop. Expansion= 1.6 MGD
2019 Expansion (In Progress)= 0.7 MGD
Existing Capacity= 3.8 MGD
TOTAL Capacity= 6.1 MGD
Wastewater Master Plan Update
City of The Colony
5-1
5.0 WASTEWATER SYSTEM CIP
5.1 PREVIOUS WASTEWATER MASTER PLAN
Since the 2014 Wastewater Master Plan Update, the City has completed eight projects from the previous
Capital Improvements Plan. Table 5-1 shows the Capital Improvement Plan projects identified in the
previous update (2014) of the Wastewater Master Plan; the completed projects have been highlighted
grey in the table and marked with a strikethrough. Many of these projects were constructed to provide
wastewater service to new areas of growth.
Table 5-1: Completed Projects from Previous (2014) Wastewater CIP
Project
Number Wastewater System Capital Improvement Plan Begin
Engineering
In Service
Date 2015-2020 1 Expand Wastewater Treatment Plant Capacity 2014 2019
2 Nebraska Furniture Mart Wastewater Line 2014 2015
3 Service for Southeast Austin Ranch 2014 2015
4 Serve Growth in Austin Ranch West of Plano Parkway 2014 2015
5 Extend Lines to Serve WP-1 2016 2017
6 Extend Collection System on Wynnwood Peninsula to
WP-2 2016 2017
7 Serve Growth in Austin Ranch East of Plano Parkway 2018 2019
8 Extend Collection System in IC-2 2018 2019
9 Extend Collection System on Wynnwood Peninsula to
serve WP-3 2019 2020
2021-2025 10 Gravity Line along Curry Road 2020 2021
11 Expand Austin Ranch Lift Station Capacity and Extend
Force Main 2020 2021
2026-Buildout 12 Serve New Development in East Austin Ranch in IC-3 2025 2026
13 Lift Station East of Wynnwood Peninsula 2026 2027
14 Lift Station East of Wynnwood Peninsula 2027 2028
15 Lift Station on Northwest Wynnwood Peninsula 2028 2029
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SH 121TeelLebanon
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FIGURE 5-1CITY OF THE COLONYPREVIOUS (2015) WASTEWATER SYSTEMCAPITAL IMPROVEMENT PLAN
Created by Freese and Nichols, Inc.Job No.: COY17543Location: H:\W_WW_PLANNING\01_DELIVERABLES\00_FINAL_REPORT\02-WASTEWATER\(Figure_5-1)_PREVIOUS_2015_Wastewater_CIP.mxdUpdated: Friday, March 8, 2019 3:24:29 PMUser Name: 02499
MAJOR BASINS
Indian Creek
Stewart Creek
Wynnwood Peninsula
!I01,400 2,800
SCALE IN FEET
LEGEND
"C`Meter Station
Vä Existing Lift Station
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Vä 2025 Lift Station
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8" and SmallerWastewater Line
10" and LargerWastewater Line
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Buildout Force Main
2025 Force Main
2025 Wastewater Line
2020 Force Main
2020 Wastewater Line
Road
Railroad
Stream
Lake
Parcel
Subbasin Boundary
U.S. Army Corps Property(Elevation Below 537 Feet)
City Limit
ETJ Boundary
Wastewater Master Plan Update
City of The Colony
5-3
5.2 CURRENT WASTEWATER CIP
The unit costs used to develop and update the opinion of probable project costs for future wastewater
projects are shown in Table 5-2. Unit costs for future projects are in 2018 dollars and based on bid tab
review for similar projects and information provided by the City for projects currently under design.
Construction costs, contingency, and engineering costs are all estimated in the total cost. Special services
such as environmental permitting, land agent costs, and geotechnical investigations are not included in
the estimates. These costs are typically not known before more detailed study of each project is
performed during the preliminary engineering design phase. Construction costs do not include individual
service connections or subdivision internal collectors.
Table 5-2: Estimated Unit Cost for Wastewater System Construction in 2018 Dollars
12” FM 20” Boring and Casing 12” Gate Valve Combination Air Valve
$100 per LF $400 per LF $3,000 Ea. $10,000 Ea.
60” Diameter MH Pavement Repair 18” Pipe 250 HP Pump & Motor
$10,000 Ea. $150 per SY $253 per LF $148,500 Ea.
10” Pipe 12” Pipe 48” Diameter MH 21” Pipe
$138 per LF $161 per LF $8,000 Ea. $299 per LF
4” FM 0.1 MGD Lift Station
$46 per LF $400,000 Ea.
The 2018 Wastewater Capital Improvement Plan (CIP) has three planning periods: 2018 to 2023, 2023 to
2028, and 2028 to Buildout. All the proposed improvements are shown on Figure 5-2. Opinions of
probable cost for all CIP projects are provided in Appendix B. It is recommended that the projects be
constructed generally in the order listed; however, development patterns may drive construction
sequencing in some instances. Table 5-3 summarizes the costs of the updated wastewater CIP.
Wastewater Master Plan Update
City of The Colony
5-4
Table 5-3: Wastewater System Capital Improvements Plan Costs
Project
Number Project Name Cost
Short Term Projects
1 New 20-Inch Austin Ranch Force Main(1) $ 3,797,900
2 Dewatering Upgrade at WWTP(1) $ 17,994,400
3 Austin Ranch Lift Station Pumps Upgrade $ 778,300
4 Extend Collection System on Wynnwood Peninsula to serve WP-3 $ 869,100
5 Gravity Sewer Along Curry Road $ 1,713,200
6 Serve New Development in East Austin Ranch in IC-3 $ 816,800
Short Term Total $ 25,969,700
Intermediate Projects
7 Serve Development in Austin Ranch West of Plano Parkway $ 1,363,800
8 Parallel 12-inch Force Main $ 1,829,900
9 Wynnwood Lift Station Rehabilitation $ 1,388,100
10 WWTP Capacity Expansion(1) $ 40,000,000
Intermediate Total $ 44,581,800
Long Term Projects
11 Lift Station 1 East of Wynnwood Peninsula $ 954,700
12 Lift Station 2 East of Wynnwood Peninsula $ 950,900
13 Lift Station on Northwest Wynnwood Peninsula $ 907,500
Long Term Total $ 2,813,100
CIP Total $ 73,364,600
(1) Cost estimate provided by the City.
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WynnwoodLift StationExisting Capacity: 1.9 MGD2028 Capacity: 2.5 MGD
CottonwoodLift Station
Water EdgeLift Station
EastvaleLift Station B.B. OwensLift Station
IolaLift Station
The Colony WWTPExisting Capacity: 3.8 MGD2019 Capacity: 4.5 MGDDewatering Upgrade2028 Capacity: 6.1 MGD
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Austin RanchLift StationExisting Capacity: 2.7 MGD2023 Capacity: 3.7 MGD2028 Capacity: 5.8 MGD
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Proposed 2028 LSCapacity: 0.1 MGD
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8"6"8"8"6"IndianCreekStew artC r e e k
Of fic e C reekMcWhorterCreek
FurneauxCreekMidwayBranchDudleyBranc h
Fu
rneaux
Cree
kMidwayBranch
Frisco
Carrollton
Lewisville
Plano
Hebron
Little Elm
Hackberry
0 1,400 2,800
SCALE IN FEET
FIGURE 5-2CITY OF THE COLONYWASTEWATER SY STEMCAPITAL IM PROVEMENTS P LAN
Created by Freese and Nichols, Inc.Job No.: COY17543Location: H:\W_WW_PLANNING\01_DELIVERABLES\00_FINAL_REPORT\02-WASTEWATER\(Figure_5-2)_Wastewater_System_CIP_22x34.mxdUpdated: Wednesday, April 24, 2019 4:49:38 PMUser Name: 02499
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MAJOR BASINS
Indian C reek
Stew art Creek
Wynnwood Penins ula
LEGEND
Existing Wastewater System
Vä Lift Station
TXWWTP Wastew ater Treatment Plant
8" and S maller Wastew ater Line
10" and Larger Wastew ater Line
Force Main
Under ConstructionWastewater Line
Road
Railroad
Stream
Lake
Parcel
USACE Property
The Colony City Limit
ET J Boundary
Other City Limit
County Boundary
PROPOSED IMPROVEMENTS
2023 Proposed Improvements
Vä Lift Station
Wastew ater Line
Force Main
2028 Proposed Improvements
Vä Lift Station
Wastew ater Line
Force Main
Buildout Proposed Im provements
Vä Lift Station
Force Main
Wastewater Master Plan Update
City of The Colony
APPENDIX A
Flow Projections
Developed Area
(Acres)Population
Average Day
Domestic Flow
(65 gpcd)1 (MGD)
Peak Dry Weather
Flow (2.5*Avg
Day) (MGD)
Developed Area
(Acres)
Average Day Flow
(450 gpd/acre)2
(MGD)
Peak Flow
(2.5*Avg)
(MGD)
Wynnwood Peninsula
WP-1 73 229 0.01 0.04 0 0.00 0.00 0.01 0.04 0.06 0.10
WP-2 12 155 0.01 0.03 2 0.00 0.00 0.01 0.03 0.01 0.04
WP-3 0 0 0.00 0.00 0 0.00 0.00 0.00 0.00 0.00 0.00
WP-4 4 0 0.00 0.00 2 0.00 0.00 0.00 0.00 0.01 0.01
WP-5 346 3,635 0.24 0.59 16 0.01 0.02 0.24 0.61 0.31 0.92
Total Wynnwood Peninsula 435 4,019 0.26 0.65 20 0.01 0.02 0.27 0.68 0.39 1.06
Stewart Creek
SC-1 0 0 0.00 0.00 0 0.00 0.00 0.00 0.00 0.00 0.00
SC-2 132 561 0.04 0.09 26 0.01 0.03 0.05 0.12 0.13 0.25
SC-3 57 647 0.04 0.11 1 0.00 0.00 0.04 0.11 0.05 0.16
SC-4 178 2,070 0.13 0.34 10 0.00 0.01 0.14 0.35 0.16 0.51
SC-5 131 1,594 0.10 0.26 16 0.01 0.02 0.11 0.28 0.12 0.40
SC-6 73 1,146 0.07 0.19 34 0.02 0.04 0.09 0.22 0.09 0.32
SC-7 64 686 0.04 0.11 35 0.02 0.04 0.06 0.15 0.08 0.24
SC-8 77 5,496 0.36 0.89 15 0.01 0.02 0.36 0.91 0.08 0.99
SC-9 128 1,394 0.09 0.23 33 0.01 0.04 0.11 0.26 0.14 0.40
SC-10 105 1,121 0.07 0.18 8 0.00 0.01 0.08 0.19 0.10 0.29
SC-11 45 547 0.04 0.09 4 0.00 0.00 0.04 0.09 0.04 0.14
SC-12 62 795 0.05 0.13 13 0.01 0.01 0.06 0.14 0.06 0.21
SC-13 123 1,474 0.10 0.24 50 0.02 0.06 0.12 0.30 0.15 0.44
SC-14 113 987 0.06 0.16 0 0.00 0.00 0.06 0.16 0.10 0.26
SC-15 45 531 0.03 0.09 13 0.01 0.01 0.04 0.10 0.05 0.15
SC-16 120 2,134 0.14 0.35 18 0.01 0.02 0.15 0.37 0.12 0.48
SC-17 241 2,953 0.19 0.48 7 0.00 0.01 0.20 0.49 0.21 0.70
SC-18 25 483 0.03 0.08 32 0.01 0.04 0.05 0.11 0.05 0.16
SC-19 158 1,684 0.11 0.27 47 0.02 0.05 0.13 0.33 0.17 0.50
SC-20 98 1,678 0.11 0.27 159 0.07 0.18 0.18 0.45 0.22 0.67
SC-21 26 2,624 0.17 0.43 152 0.07 0.17 0.24 0.60 0.15 0.75
SC-22 126 2,483 0.16 0.40 253 0.11 0.28 0.28 0.69 0.32 1.01
SC-233 0 727 0.05 0.12 296 0.13 0.33 0.18 0.45 0.25 0.70
Total Stewart Creek 2,127 33,818 2.20 5.50 1,222 0.55 1.37 2.75 6.87 2.85 9.72
Indian Creek
IC-1 0 145 0.01 0.03 59 0.06 0.14 0.07 0.17 0.05 0.22
IC-2 136 1,037 0.09 0.22 13 0.01 0.03 0.10 0.25 0.13 0.37
IC-3 150 3,273 0.27 0.68 0 0.00 0.00 0.27 0.68 0.13 0.81
Total Indian Creek 286 4,456 0.37 0.92 72 0.07 0.17 0.44 1.10 0.30 1.40
TOTAL 2,848 42,292 2.83 7.07 1,314 0.63 1.57 3.46 8.64 3.54 12.18
Year 2018
City of The Colony Wastewater Flow Projections
Table A-1
Residential
2. Indian Creek Basin Commercial Flow Factor is 950 gpd/acre
1. Indian Creek Basin Residential Flow Factor is 82 gpcd
Sub-basinBasin
Peak Dry
Weather
Flow (MGD)
Average Dry Weather
Flow
(MGD)
Commercial and Industrial
Peak I/I Allowance
(850 gpd/acre)
(MGD)
Peak Wet
Weather
Flow
(MGD)
3. Sub-basin SC-23 includes Nebraska Furniture Mart
Developed Area
(Acres)Population
Average Day
Domestic Flow
(65 gpcd)1 (MGD)
Peak Dry Weather
Flow (2.5*Avg
Day) (MGD)
Developed Area
(Acres)
Average Day Flow
(450 gpd/acre)2
(MGD)
Peak Flow
(2.5*Avg)
(MGD)
Wynnwood Peninsula
WP-1 265 1,494 0.10 0.24 0 0.00 0.00 0.10 0.24 0.24 0.48
WP-2 54 413 0.03 0.07 10 0.00 0.01 0.03 0.08 0.06 0.14
WP-3 0 0 0.00 0.00 68 0.03 0.08 0.03 0.08 0.06 0.14
WP-4 12 49 0.00 0.01 2 0.00 0.00 0.00 0.01 0.01 0.02
WP-5 349 3,654 0.24 0.59 18 0.01 0.02 0.25 0.61 0.33 0.94
Total Wynnwood Peninsula 680 5,610 0.36 0.91 98 0.04 0.11 0.41 1.02 0.70 1.72
Stewart Creek
SC-1 7 10 0.00 0.00 0 0.00 0.00 0.00 0.00 0.01 0.01
SC-2 145 581 0.04 0.09 26 0.01 0.03 0.05 0.12 0.15 0.28
SC-3 93 703 0.05 0.11 1 0.00 0.00 0.05 0.12 0.08 0.20
SC-4 207 2,115 0.14 0.34 10 0.00 0.01 0.14 0.35 0.20 0.55
SC-5 160 1,639 0.11 0.27 16 0.01 0.02 0.11 0.28 0.16 0.44
SC-6 99 1,185 0.08 0.19 34 0.02 0.04 0.09 0.23 0.12 0.35
SC-7 89 725 0.05 0.12 35 0.02 0.04 0.06 0.16 0.11 0.27
SC-8 99 5,531 0.36 0.90 15 0.01 0.02 0.37 0.92 0.10 1.02
SC-9 190 1,490 0.10 0.24 33 0.01 0.04 0.11 0.28 0.20 0.48
SC-10 138 1,172 0.08 0.19 8 0.00 0.01 0.08 0.20 0.13 0.33
SC-11 58 567 0.04 0.09 4 0.00 0.00 0.04 0.10 0.06 0.15
SC-12 78 819 0.05 0.13 13 0.01 0.01 0.06 0.15 0.08 0.23
SC-13 168 1,543 0.10 0.25 50 0.02 0.06 0.12 0.31 0.20 0.50
SC-14 127 1,009 0.07 0.16 0 0.00 0.00 0.07 0.16 0.11 0.28
SC-15 60 554 0.04 0.09 13 0.01 0.01 0.04 0.10 0.07 0.17
SC-16 156 2,190 0.14 0.36 18 0.01 0.02 0.15 0.38 0.16 0.53
SC-17 251 2,969 0.19 0.48 7 0.00 0.01 0.20 0.49 0.23 0.72
SC-18 56 530 0.03 0.09 32 0.01 0.04 0.05 0.12 0.08 0.20
SC-19 208 1,762 0.11 0.29 47 0.02 0.05 0.14 0.34 0.23 0.57
SC-20 197 1,830 0.12 0.30 258 0.12 0.29 0.23 0.59 0.41 1.00
SC-214 136 3,301 0.21 0.54 154 0.08 0.21 0.30 0.74 0.26 1.00
SC-22 138 2,594 0.17 0.42 301 0.14 0.34 0.30 0.76 0.40 1.16
SC-233 3 1,688 0.11 0.27 299 0.15 0.37 0.26 0.64 0.27 0.91
Total Stewart Creek 2,862 36,506 2.37 5.93 1,374 0.64 1.61 3.02 7.54 3.81 11.35
Indian Creek
IC-1 0 145 0.01 0.03 59 0.06 0.14 0.07 0.17 0.05 0.22
IC-2 209 2,610 0.22 0.54 13 0.01 0.03 0.23 0.57 0.20 0.77
IC-3 177 3,564 0.30 0.74 0 0.00 0.00 0.30 0.74 0.16 0.90
Total Indian Creek 386 6,320 0.52 1.31 72 0.07 0.17 0.59 1.48 0.41 1.89
TOTAL 3,928 48,436 3.26 8.16 1,544 0.76 1.89 4.02 10.05 4.92 14.97
Year 2023
City of The Colony Wastewater Flow Projections
Table A-2
1. Indian Creek Basin Residential Flow Factor is 82 gpcd
2. Indian Creek Basin Commercial Flow Factor is 950 gpd/acre
Commercial and Industrial
Average Dry Weather
Flow
(MGD)
Basin Sub-basin
Residential
3. Sub-basin SC-23 includes Nebraska Furniture Mart, future hotel, and future high-rise apartment development
Peak I/I Allowance
(900 gpd/acre)
(MGD)
Peak Wet
Weather
Flow
(MGD)
Peak Dry
Weather
Flow (MGD)
4. Sub-basin SC-21 includes a future hotel
Developed Area
(Acres)Population
Average Day
Domestic Flow
(65 gpcd)1 (MGD)
Peak Dry Weather
Flow (2.5*Avg
Day) (MGD)
Developed Area
(Acres)
Average Day Flow
(450 gpd/acre)2
(MGD)
Peak Flow
(2.5*Avg)
(MGD)
Wynnwood Peninsula
WP-1 265 1,494 0.10 0.24 0 0.00 0.00 0.10 0.24 0.24 0.48
WP-2 54 413 0.03 0.07 10 0.00 0.01 0.03 0.08 0.06 0.14
WP-3 0 0 0.00 0.00 68 0.03 0.08 0.03 0.08 0.06 0.14
WP-4 12 49 0.00 0.01 2 0.00 0.00 0.00 0.01 0.01 0.02
WP-5 349 3,654 0.24 0.59 18 0.01 0.02 0.25 0.61 0.33 0.94
Total Wynnwood Peninsula 680 5,610 0.36 0.91 98 0.04 0.11 0.41 1.02 0.70 1.72
Stewart Creek
SC-1 13 19 0.00 0.00 0 0.00 0.00 0.00 0.00 0.01 0.02
SC-2 157 596 0.04 0.10 26 0.01 0.03 0.05 0.13 0.17 0.29
SC-3 130 748 0.05 0.12 1 0.00 0.00 0.05 0.12 0.12 0.24
SC-4 237 2,151 0.14 0.35 10 0.00 0.01 0.14 0.36 0.22 0.58
SC-5 189 1,675 0.11 0.27 16 0.01 0.02 0.12 0.29 0.18 0.47
SC-6 124 1,217 0.08 0.20 34 0.02 0.04 0.09 0.24 0.14 0.38
SC-7 114 756 0.05 0.12 35 0.02 0.04 0.06 0.16 0.13 0.30
SC-8 122 5,558 0.36 0.90 15 0.01 0.02 0.37 0.92 0.12 1.04
SC-9 253 1,567 0.10 0.25 33 0.01 0.04 0.12 0.29 0.26 0.55
SC-10 171 1,212 0.08 0.20 8 0.00 0.01 0.08 0.21 0.16 0.37
SC-11 70 582 0.04 0.09 4 0.00 0.00 0.04 0.10 0.07 0.17
SC-12 93 839 0.05 0.14 13 0.01 0.01 0.06 0.15 0.10 0.25
SC-13 213 1,599 0.10 0.26 50 0.02 0.06 0.13 0.32 0.24 0.55
SC-14 142 1,027 0.07 0.17 0 0.00 0.00 0.07 0.17 0.13 0.29
SC-15 74 572 0.04 0.09 13 0.01 0.01 0.04 0.11 0.08 0.19
SC-16 192 2,234 0.15 0.36 29 0.01 0.03 0.16 0.40 0.20 0.59
SC-17 262 2,982 0.19 0.48 7 0.00 0.01 0.20 0.49 0.24 0.73
SC-18 86 568 0.04 0.09 32 0.01 0.04 0.05 0.13 0.11 0.23
SC-19 259 1,824 0.12 0.30 47 0.02 0.05 0.14 0.35 0.28 0.62
SC-20 295 1,952 0.13 0.32 258 0.12 0.29 0.24 0.61 0.50 1.10
SC-214 246 3,845 0.25 0.62 154 0.08 0.21 0.33 0.83 0.36 1.19
SC-22 293 2,786 0.18 0.45 301 0.14 0.34 0.32 0.79 0.53 1.33
SC-233 19 2,328 0.15 0.38 338 0.16 0.41 0.32 0.79 0.32 1.11
Total Stewart Creek 3,755 38,638 2.51 6.28 1,424 0.67 1.67 3.18 7.94 4.66 12.61
Indian Creek
IC-1 111 2,068 0.17 0.43 161 0.15 0.38 0.32 0.81 0.24 1.06
IC-2 209 2,610 0.22 0.54 96 0.09 0.23 0.31 0.77 0.27 1.04
IC-3 234 4,551 0.38 0.94 0 0.00 0.00 0.38 0.94 0.21 1.16
Total Indian Creek 554 9,229 0.77 1.91 257 0.24 0.61 1.01 2.53 0.73 3.26
TOTAL 4,989 53,477 3.64 9.11 1,779 0.95 2.39 4.60 11.49 6.09 17.58
City of The Colony Wastewater Flow Projections
Year 2028
2. Indian Creek Basin Commercial Flow Factor is 950 gpd/acre
4. Sub-basin SC-21 includes a future hotel
Basin Sub-basin
Commercial and Industrial
3. Sub-basin SC-23 includes Nebraska Furniture Mart, future hotel, and future high-rise apartment development
Average Dry Weather
Flow
(MGD)
Peak Dry
Weather
Flow (MGD)
Peak I/I Allowance
(900 gpd/acre)
(MGD)
Peak Wet
Weather
Flow
(MGD)
Residential
1. Indian Creek Basin Residential Flow Factor is 82 gpcd
Table A-3
Developed Area
(Acres)Population
Average Day
Domestic Flow
(65 gpcd)1 (MGD)
Peak Dry Weather
Flow (2.5*Avg
Day) (MGD)
Developed Area
(Acres)
Average Day Flow
(450 gpd/acre)2
(MGD)
Peak Flow
(2.5*Avg)
(MGD)
Wynnwood Peninsula
WP-1 265 1,494 0.10 0.24 0 0.00 0.00 0.10 0.24 0.27 0.51
WP-2 54 413 0.03 0.07 10 0.00 0.01 0.03 0.08 0.06 0.14
WP-3 0 0 0.00 0.00 68 0.03 0.08 0.03 0.08 0.07 0.14
WP-4 12 49 0.00 0.01 2 0.00 0.00 0.00 0.01 0.01 0.02
WP-5 382 5,187 0.34 0.84 29 0.01 0.03 0.35 0.88 0.41 1.29
Total Wynnwood Peninsula 713 7,144 0.46 1.16 109 0.05 0.12 0.51 1.28 0.82 2.11
Stewart Creek
SC-1 18 77 0.00 0.01 2 0.00 0.00 0.01 0.01 0.02 0.03
SC-2 157 596 0.04 0.10 26 0.01 0.03 0.05 0.13 0.18 0.31
SC-3 156 1,056 0.07 0.17 10 0.00 0.01 0.07 0.18 0.17 0.35
SC-4 251 2,320 0.15 0.38 15 0.01 0.02 0.16 0.39 0.27 0.66
SC-5 199 1,788 0.12 0.29 19 0.01 0.02 0.12 0.31 0.22 0.53
SC-6 124 1,217 0.08 0.20 34 0.02 0.04 0.09 0.24 0.16 0.39
SC-7 114 756 0.05 0.12 35 0.02 0.04 0.06 0.16 0.15 0.31
SC-8 127 5,622 0.37 0.91 17 0.01 0.02 0.37 0.93 0.14 1.08
SC-9 275 1,823 0.12 0.30 40 0.02 0.05 0.14 0.34 0.32 0.66
SC-10 190 1,430 0.09 0.23 14 0.01 0.02 0.10 0.25 0.20 0.45
SC-11 77 658 0.04 0.11 6 0.00 0.01 0.05 0.11 0.08 0.20
SC-12 93 839 0.05 0.14 13 0.01 0.01 0.06 0.15 0.11 0.26
SC-13 213 1,599 0.10 0.26 50 0.02 0.06 0.13 0.32 0.26 0.58
SC-14 152 1,152 0.07 0.19 4 0.00 0.00 0.08 0.19 0.16 0.35
SC-15 74 572 0.04 0.09 13 0.01 0.01 0.04 0.11 0.09 0.19
SC-16 192 2,234 0.15 0.36 29 0.01 0.03 0.16 0.40 0.22 0.62
SC-17 262 2,982 0.19 0.48 7 0.00 0.01 0.20 0.49 0.27 0.76
SC-18 86 568 0.04 0.09 32 0.01 0.04 0.05 0.13 0.12 0.25
SC-19 259 1,824 0.12 0.30 47 0.02 0.05 0.14 0.35 0.31 0.65
SC-20 295 1,952 0.13 0.32 258 0.12 0.29 0.24 0.61 0.55 1.16
SC-214 246 3,845 0.25 0.62 154 0.08 0.21 0.33 0.83 0.40 1.23
SC-22 293 2,786 0.18 0.45 301 0.14 0.34 0.32 0.79 0.59 1.39
SC-233 96 3,225 0.21 0.52 364 0.18 0.44 0.39 0.97 0.46 1.43
Total Stewart Creek 3,951 40,921 2.66 6.65 1,489 0.70 1.74 3.36 8.39 5.44 13.83
Indian Creek
IC-1 135 4,019 0.33 0.83 169 0.16 0.40 0.49 1.24 0.30 1.54
IC-2 265 7,123 0.59 1.48 115 0.11 0.27 0.70 1.75 0.38 2.13
IC-3 281 8,394 0.70 1.74 16 0.01 0.04 0.71 1.78 0.30 2.08
Total Indian Creek 681 19,536 1.62 4.05 299 0.28 0.71 1.91 4.76 0.98 5.74
TOTAL 5,345 67,600 4.75 11.86 1,897 1.03 2.57 5.77 14.44 7.24 21.68
Table A-4
Buildout
City of The Colony Wastewater Flow Projections
4. Sub-basin SC-21 includes a future hotel
3. Sub-basin SC-23 includes Nebraska Furniture Mart, future hotel, and future high-rise apartment development
1. Indian Creek Basin Residential Flow Factor is 82 gpcd
2. Indian Creek Basin Commercial Flow Factor is 950 gpd/acre
Residential Commercial and Industrial
Average Dry Weather
Flow
(MGD)
Peak Dry
Weather
Flow (MGD)
Peak Wet
Weather
Flow
(MGD)
Basin Sub-basin
Peak I/I Allowance
(1000 gpd/acre)
(MGD)
Basin Sub-Basin2018 PWWF(Current Study)(MGD)2018 PWWF(1)(2014 WWMP)(MGD)2023 PWWF(Current Study)(MGD)2023 PWWF(1)(2014 WWMP)(MGD)2028 PWWF(Current Study)(MGD)2028 PWWF(1)(2014 WWMP)(MGD)Buildout(Current Study)(MGD)Buildout (2014 WWMP)(MGD)Wynnwood PeninsulaWP-10.10 0.00 0.48 0.02 0.48 0.21 0.51 0.32WP-20.04 0.00 0.14 0.01 0.14 0.07 0.14 0.11WP-30.00 0.07 0.14 0.09 0.14 0.09 0.14 0.09WP-40.01 0.33 0.02 0.39 0.02 0.40 0.02 0.41WP-50.921.260.941.470.941.511.291.54Total Wynnwood Peninsula1.06 1.66 1.72 1.98 1.72 2.28 2.11 2.46Stewart CreekSC-10.00 0.00 0.01 0.00 0.02 0.00 0.03 0.00SC-20.25 0.31 0.28 0.33 0.29 0.34 0.31 0.34SC-30.16 0.21 0.20 0.22 0.24 0.22 0.35 0.22SC-40.51 0.70 0.55 0.71 0.58 0.72 0.66 0.73SC-50.40 0.59 0.44 0.59 0.47 0.60 0.53 0.61SC-60.32 0.40 0.35 0.40 0.38 0.41 0.39 0.41SC-70.24 0.33 0.27 0.33 0.30 0.36 0.31 0.38SC-80.99 0.36 1.02 0.36 1.04 0.37 1.08 0.37SC-90.40 0.58 0.48 0.59 0.55 0.60 0.66 0.61SC-100.29 0.50 0.33 0.51 0.37 0.52 0.45 0.52SC-110.14 0.20 0.15 0.20 0.17 0.20 0.20 0.21SC-120.21 0.31 0.23 0.31 0.25 0.32 0.26 0.32SC-130.44 0.59 0.50 0.60 0.55 0.61 0.58 0.61SC-140.26 0.46 0.28 0.46 0.29 0.47 0.35 0.47SC-150.15 0.20 0.17 0.20 0.19 0.20 0.19 0.21SC-160.48 0.66 0.53 0.67 0.59 0.68 0.62 0.69SC-170.70 1.37 0.72 1.46 0.73 1.48 0.76 1.49SC-180.16 0.25 0.20 0.29 0.23 0.52 0.25 0.66SC-190.50 0.80 0.57 0.81 0.62 0.82 0.65 0.83SC-200.67 0.87 1.00 0.90 1.10 0.91 1.16 0.92SC-210.75 0.44 1.00 0.45 1.19 0.46 1.23 0.47SC-221.01 1.07 1.16 1.08 1.33 1.10 1.39 1.12SC-230.70 0.16 0.91 0.17 1.11 0.17 1.43 0.17Total Stewart Creek9.72 12.51 11.35 13.21 12.61 13.65 13.83 13.92Indian CreekIC-10.22 0.40 0.22 0.43 1.06 0.50 1.54 0.54IC-20.37 1.02 0.77 1.34 1.04 1.36 2.13 1.38IC-30.81 1.49 0.90 1.62 1.16 2.66 2.08 3.29Total Indian Creek1.40 2.91 1.89 3.39 3.26 4.52 5.74 5.22TOTAL SYSTEM12.18 17.08 14.97 18.58 17.59 20.45 21.67 21.60(1) Previous 2015 Watewater Master Plan Update Planning Years were 2015, 2020, 2025 and Buildout. Straight-line interpolation was used to estimate flows for interim years 2018, 2023, and 2028 for comparison to current WWMP Update.City of The Colony: Comparison of Peak Wet Weather Flows- Current Update vs 2015 UpdateTable A-5
0.02.04.06.08.010.012.014.016.020182023202820332038Flow (MGD)Figure A-1Comparison of PWWF Projections (Current Study vs Previous 2015 WWMP) Wynnwood PeninsulaWynnwood Peninsula-prevStewart CreekStewart Creek-prevIndian CreekIndian Creek-prev
Basin Sub-Basin2018 ADDF(Current Study)(MGD)2018 ADDF(1)(2014 WWMP)(MGD)2023 ADDF(Current Study)(MGD)2023 ADDF(1)(2014 WWMP)(MGD)2028 ADDF(Current Study)(MGD)2028 ADDF(1)(2014 WWMP)(MGD)Buildout ADDF(Current Study)(MGD)Buildout ADDF(2014 WWMP)(MGD)Wynnwood PeninsulaWP-10.01 0.00 0.10 0.01 0.10 0.06 0.10 0.10WP-20.01 0.00 0.03 0.00 0.03 0.02 0.03 0.03WP-30.00 0.02 0.03 0.03 0.03 0.03 0.03 0.03WP-40.00 0.08 0.00 0.10 0.00 0.10 0.00 0.10WP-50.24 0.29 0.25 0.35 0.25 0.36 0.35 0.36Total Wynnwood Peninsula0.27 0.39 0.41 0.49 0.41 0.56 0.51 0.61Stewart CreekSC-10.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00SC-20.05 0.09 0.05 0.09 0.05 0.09 0.05 0.09SC-30.04 0.06 0.05 0.07 0.05 0.07 0.07 0.07SC-40.14 0.21 0.14 0.21 0.14 0.21 0.16 0.21SC-50.11 0.18 0.11 0.18 0.12 0.18 0.12 0.18SC-60.09 0.12 0.09 0.12 0.09 0.12 0.09 0.12SC-70.06 0.10 0.06 0.10 0.06 0.10 0.06 0.11SC-80.36 0.11 0.37 0.11 0.37 0.11 0.37 0.11SC-90.11 0.18 0.11 0.18 0.12 0.18 0.14 0.18SC-100.08 0.16 0.08 0.16 0.08 0.16 0.10 0.16SC-110.04 0.06 0.04 0.06 0.04 0.06 0.05 0.06SC-120.06 0.10 0.06 0.10 0.06 0.10 0.06 0.10SC-130.12 0.18 0.12 0.18 0.13 0.18 0.13 0.18SC-140.06 0.14 0.07 0.14 0.07 0.14 0.08 0.14SC-150.04 0.06 0.04 0.06 0.04 0.06 0.04 0.06SC-160.15 0.22 0.15 0.22 0.16 0.22 0.16 0.22SC-170.20 0.45 0.20 0.48 0.20 0.48 0.20 0.48SC-180.05 0.08 0.05 0.09 0.05 0.17 0.05 0.21SC-190.13 0.25 0.14 0.25 0.14 0.25 0.14 0.25SC-200.18 0.26 0.23 0.26 0.24 0.26 0.24 0.26SC-210.24 0.12 0.30 0.12 0.33 0.12 0.33 0.12SC-220.28 0.29 0.30 0.30 0.32 0.30 0.32 0.30SC-230.18 0.04 0.26 0.05 0.32 0.05 0.39 0.05Total Stewart Creek2.75 3.67 3.02 3.83 3.18 3.91 3.36 3.96Indian CreekIC-10.07 0.09 0.07 0.10 0.32 0.11 0.49 0.12IC-20.10 0.29 0.23 0.39 0.31 0.39 0.70 0.39IC-30.27 0.54 0.30 0.59 0.38 0.93 0.71 1.14Total Indian Creek0.44 0.92 0.59 1.08 1.01 1.44 1.91 1.66TOTAL SYSTEM3.46 4.99 4.02 5.40 4.60 5.91 5.77 6.22(1) Previous 2015 Watewater Master Plan Update Planning Years were 2015, 2020, 2025 and Buildout. Straight-line interpolation was used to estimate flows for interim years 2018, 2023, and 2028 for comparison to current WWMP Update.Table A-6City of The Colony: Comparison of Average Day Dry Weather Flows- Current Update vs 2015 Update
0.00.51.01.52.02.53.03.54.04.520182023202820332038Flow (MGD)Figure A-2Comparison of ADDF Projections (Current Study vs Previous 2015 WWMP) Wynnwood PeninsulaWynnwood Peninsula-prevStewart CreekStewart Creek-prevIndian CreekIndian Creek-prev
Wastewater Master Plan Update
City of The Colony
APPENDIX B
CIP— Opinions of Probable Cost
1 short
ITEM QUANTITY UNIT UNIT PRICE TOTAL
1 1 LS 3,452,600$ 3,452,600$
3,452,600$
10%345,300$
3,797,900$
0%-$
3,797,900$
3,797,900$
SUBTOTAL:
Estimated Project Total:
Comments: Cost estimate provided by City. Project is currently at 60% design.
SUBTOTAL:
CONTINGENCY
SUBTOTAL:
ENG/SURVEY
Project Name:New 20-Inch Austin Ranch Force Main
Opinion of Probable Construction Cost
DESCRIPTION
20" Austin Ranch Force Main
Project Description:Vicinity Map
Construct a new 20-inch force main. The force main will start near Plano
Parkway and connect to the future parallel 12-inch force mains. It will run
approximately 7,300 linear feet to connect to the existing 20-inch force main
near South Colony Blvd. The second segment of the Force Main starts near
Medical Plaza West Ditch connected to the existing 20-inch force main and
continues approximately 1,000 linear foot to connect to the junction box near
Miller Drive via existing 20-inch stub-out.
Project Drivers:
The new 20-inch force main section will increase capacity of the Austin Ranch
force main system and allow conveyance of larger flows to accommodate
additional future growth in the Austin Ranch area. This force main will
redirect flows from the Austin Ranch LS to discharge further downstream in
the collection, closer to the WWTP. This will alleviate flow on the existing
Office Creek Interceptor line, which is nearing capacity.
Capital Improvement Cost Estimate Cost Estimate in 2018 Dollars
City of Colony
Construction Project Number:Phase:
B-1
Capital Improvement Cost Estimate Cost Estimate in 2018 Dollars
City of Colony
2 short
ITEM QUANTITY UNIT UNIT PRICE TOTAL
1 1 LS 13,841,716$ 13,841,716$
13,841,800$
30%4,152,600$
17,994,400$
0%-$
17,994,400$
17,994,400$
SUBTOTAL:
Estimated Project Total:
Comments: Cost estimate provided by City. Cost estimate includes engineering and design fees.
SUBTOTAL:
CONTINGENCY
SUBTOTAL:
ENG/SURVEY
Opinion of Probable Construction Cost
DESCRIPTION
Dewatering Upgrade
Project Name:Dewatering Upgrade at WWTP
Project Description:Vicinity Map
This project will upgrade the dewatering equipment at the WWTP.
Project Drivers:
The City has a need to upgrade the dewatering equipment at the WWTP in
the near future.
Construction Project Number:Phase:
B-2
Capital Improvement Cost Estimate Cost Estimate in 2018 Dollars
City of Colony
3 short
ITEM QUANTITY UNIT UNIT PRICE TOTAL
1 3 EA 148,500$ 445,500$
2 1 LS 75,000$ 75,000$
520,500$
30%156,200$
676,700$
15%101,600$
778,300$
778,300$
SUBTOTAL:
Estimated Project Total:
Comments:
SUBTOTAL:
CONTINGENCY
SUBTOTAL:
ENG/SURVEY
Opinion of Probable Construction Cost
DESCRIPTION
250 HP Pump and Motor
Misc. Electrical
Project Name:Austin Ranch Lift Station Pumps Upgrade
Project Description:Vicinity Map
This project includes upgrades to the Austin Ranch Lift Station. The existing
pumps will be replaced to increase the capacity of the Lift Station to 3.7
MGD.
Project Drivers:
Upgrading the Austin Ranch Lift Station will add capacity needed to convey
larger flows from new growth in the Austin Ranch area.
Construction Project Number:Phase:
B-3
Capital Improvement Cost Estimate Cost Estimate in 2018 Dollars
City of Colony
4 short
ITEM QUANTITY UNIT UNIT PRICE TOTAL
1 1 EA 400,000$ 400,000$
2 2,790 LF 46$ 128,340$
3 1 LS 52,900$ 52,900$
581,300$
30%174,400$
755,700$
15%113,400$
869,100$
869,100$
SUBTOTAL:
Estimated Project Total:
Comments:
SUBTOTAL:
CONTINGENCY
SUBTOTAL:
ENG/SURVEY
Mobilization and General Site Preparation
Opinion of Probable Construction Cost
DESCRIPTION
80 gpm (0.115 MGD) Lift Station
4" Force Main
Project Name:Extend Collection System on Wynnwood Peninsula to serve WP-3
Project Description:Vicinity Map
Construct a new 0.1 MGD lift station to serve WP-3.
Project Drivers:
This project will serve new development in the WP-3 sub-basin.
Construction Project Number:Phase:
B-4
Capital Improvement Cost Estimate Cost Estimate in 2018 Dollars
City of Colony
5 short
ITEM QUANTITY UNIT UNIT PRICE TOTAL
1 1,320 LF 360$ 475,200$
2 870 LF 400$ 348,000$
3 6 EA 6,000$ 36,000$
4 1,217 SY 150$ 182,500$
5 1 LS 104,200$ 104,200$
1,145,900$
30%343,800$
1,489,700$
15%223,500$
1,713,200$
1,713,200$
SUBTOTAL:
Estimated Project Total:
Comments:
SUBTOTAL:
CONTINGENCY
SUBTOTAL:
ENG/SURVEY
72" Diameter Manhole
Pavement Repair
Mobilization and General Site Preparation
Opinion of Probable Construction Cost
DESCRIPTION
30" Pipe 8- 16 feet deep
36" Pipe 8- 16 feet deep
Project Name:Gravity Sewer Along Curry Road
Project Description:Vicinity Map
Replace existing gravity sewer with 30" and 36" lines along Curry Road.
Project Drivers:
This project will increase capacity of the Curry Road gravity sewer and
eliminate the existing bottleneck.
Construction Project Number:Phase:
B-5
Capital Improvement Cost Estimate Cost Estimate in 2018 Dollars
City of Colony
6 short
ITEM QUANTITY UNIT UNIT PRICE TOTAL
1 2,680 LF 138$ 369,840$
2 200 LF 400$ 80,000$
3 5 EA 8,000$ 40,000$
4 45 SY 150$ 6,750$
5 1 LS 49,700$ 49,700$
546,300$
30%163,900$
710,200$
15%106,600$
816,800$
816,800$
SUBTOTAL:
Estimated Project Total:
Comments:
SUBTOTAL:
CONTINGENCY
SUBTOTAL:
ENG/SURVEY
48" Diameter Manhole
Pavement Repair
Mobilization and General Site Preparation
Opinion of Probable Construction Cost
DESCRIPTION
10" Pipe 8- 16 feet deep
20" Boring and Casing
Project Name:Serve New Development in East Austin Ranch in IC-3
Project Description:Vicinity Map
Construct a new 10" line from the SW corner of sub-basin IC-3 to the existing
18" in Basin IC-2.
Project Drivers:
This project will serve new development in the east Austin Ranch area.
Construction Project Number:Phase:
B-6
7 intermediate
ITEM QUANTITY UNIT UNIT PRICE TOTAL
1 3,730 LF 138$ 514,740$
2 1,100 LF 161$ 177,100$
3 10 EA 8,000$ 77,280$
4 150 LF 400$ 60,000$
5 1 LS 83,000$ 83,000$
912,200$
30%273,700$
1,185,900$
15%177,900$
1,363,800$
1,363,800$
Capital Improvement Cost Estimate Cost Estimate in 2018 Dollars
City of The Colony
Project Description:Vicinity Map
Construct 10"/12" wastewater lines west of Plano Parkway to Austin
Ranch LS.
Project Drivers:
The project will provide service to new development west of Plano
Parkway.
Construction Project Number:Phase:
Project Name:Serve Development in Austin Ranch West of Plano Parkway
48" Diameter Manhole
20" Boring and Casing
Mobilization and General Site Preparation
Opinion of Probable Construction Cost
DESCRIPTION
10" Pipe 8- 16 feet deep
12" Pipe 8- 16 feet deep
SUBTOTAL:
Estimated Project Total:
Comments:
SUBTOTAL:
CONTINGENCY
SUBTOTAL:
ENG/SURVEY
B-7
Capital Improvement Cost Estimate Cost Estimate in 2018 Dollars
City of The Colony
8 intermediate
ITEM QUANTITY UNIT UNIT PRICE TOTAL
1 1 LS 100,000$ 100,000$
2 8,800 LF 100$ 880,000$
3 500 LF 400$ 200,000$
4 8 EA 3,000$ 24,000$
5 2 EA 10,000$ 20,000$
1,224,000$
30%367,200$
1,591,200$
15%238,700$
1,829,900$
1,829,900$
Construction Project Number:Phase:
Project Name:Parallel 12-inch Force Main
Project Description:Vicinity Map
This project includes construction of a new 12-inch force main running
parallel to the existing 12-inch force main. The 12-inch force main will
start at the Austin Ranch Lift Station and continue approximately 9,000
linear feet to connect to the proposed 20-inch force main (Project 1) near
Project Drivers:
The parallel 12-inch line will increase the capacity of the Austin Ranch LS
and forcemain system to 5.8 MGD. This increased capacity will allow the
conveyance of larger flows as development continues in the Austin Ranch
area.
20" Boring and Casing
12" Gate Valve
Combination Air Valve
Opinion of Probable Construction Cost
DESCRIPTION
Mobilization and General Site Preparation
12" Force Main < 8 feet deep
SUBTOTAL:
Estimated Project Total:
Comments: Cost estimate provided by City.
SUBTOTAL:
CONTINGENCY
SUBTOTAL:
ENG/SURVEY
B-8
Capital Improvement Cost Estimate Cost Estimate in 2018 Dollars
City of The Colony
9 intermediate
ITEM QUANTITY UNIT UNIT PRICE TOTAL
1 1 LS 844,000$ 844,000$
2 1 LS 84,400$ 84,400$
928,400$
30%278,600$
1,207,000$
15%181,100$
1,388,100$
1,388,100$
Construction Project Number:Phase:
Project Name:Wynnwood Lift Station Rehabilitation
Project Description:Vicinity Map
Rehabiliate the Wynnwood Lift Station by replacing pumps, coating wet
well, pipes and valves.
Project Drivers:
This project will rehabilitate the Wynnwood Lift Station and prolong the
life of the asset.
Opinion of Probable Construction Cost
DESCRIPTION
LS Rehabilitation
Mobilization and General Site Preparation
SUBTOTAL:
Estimated Project Total:
Comments:
SUBTOTAL:
CONTINGENCY
SUBTOTAL:
ENG/SURVEY
B-9
Capital Improvement Cost Estimate Cost Estimate in 2018 Dollars
City of The Colony
10 intermediate
ITEM QUANTITY UNIT UNIT PRICE TOTAL
1 1 LS 40,000,000$ 40,000,000$
40,000,000$
0%-$
40,000,000$
0%-$
40,000,000$
40,000,000$
Construction Project Number:Phase:
Project Name:WWTP Capacity Expansion
Project Description:Vicinity Map
Increase capacity at existing WWTP to 6.1 MGD
Project Drivers:
This project will increase capacity of the existing WWTP by 1.6 MGD
(average daily flow), for a total treatment capacity of 6.1 MGD. This
expansion is needed to treat additional flow from projected future growth.
This will expand the City's treatment capacity to meet projected Buildout
conditions.
Opinion of Probable Construction Cost
DESCRIPTION
WWTP Capacity Expansion
SUBTOTAL:
Estimated Project Total:
Comments: Cost estimate provided by City . Engineering costs and contingency are included in LS estimate.
SUBTOTAL:
CONTINGENCY
SUBTOTAL:
ENG/SURVEY
B-10
11 long
ITEM QUANTITY UNIT UNIT PRICE TOTAL
1 1 LS 400,000$ 400,000$
2 3,920 LF 46$ 180,320$
3 1 LS 58,100$ 58,100$
638,500$
30%191,600$
830,100$
15%124,600$
954,700$
954,700$
Capital Improvement Cost Estimate Cost Estimate in 2018 Dollars
City of Colony
Project Description:Vicinity Map
Construct a new 0.1 MGD lift station east of Wynnwood Peninsula and 4"
force main.
Project Drivers:
This new lift station will serve future growth east of the Wynnwood
Peninsula.
Construction Project Number:Phase:
Project Name:Lift Station 1 East of Wynnwood Peninsula
Mobilization and General Site Preparation
Opinion of Probable Construction Cost
DESCRIPTION
80 gpm (0.115 MGD) Lift Station
4" Force Main
SUBTOTAL:
Estimated Project Total:
Comments:
SUBTOTAL:
CONTINGENCY
SUBTOTAL:
ENG/SURVEY
B-11
Capital Improvement Cost Estimate Cost Estimate in 2018 Dollars
City of Colony
12 long
ITEM QUANTITY UNIT UNIT PRICE TOTAL
1 1 EA 400,000$ 400,000$
2 3,870 LF 46$ 178,020$
3 1 LS 57,900$ 57,900$
636,000$
30%190,800$
826,800$
15%124,100$
950,900$
950,900$
Construction Project Number:Phase:
Project Name:Lift Station 2 East of Wynnwood Peninsula
Project Description:Vicinity Map
Construct a new 0.1 MGD lift station east of Wynnwood Peninsula and 4"
force main.
Project Drivers:
This new lift station will serve future growth east of the Wynnwood
Peninsula.
Mobilization and General Site Preparation
Opinion of Probable Construction Cost
DESCRIPTION
80 gpm (0.115 MGD) Lift Station
4" Force Main
SUBTOTAL:
Estimated Project Total:
Comments:
SUBTOTAL:
CONTINGENCY
SUBTOTAL:
ENG/SURVEY
B-12
Capital Improvement Cost Estimate Cost Estimate in 2018 Dollars
City of Colony
13 long
ITEM QUANTITY UNIT UNIT PRICE TOTAL
1 1 EA 400,000$ 400,000$
2 3,300 LF 46$ 151,800$
3 1 LS 55,200$ 55,200$
607,000$
30%182,100$
789,100$
15%118,400$
907,500$
907,500$
Construction Project Number:Phase:
Project Name:Lift Station on Northwest Wynnwood Peninsula
Project Description:Vicinity Map
Construct a new 0.1 MGD lift station on northwest Wynnwood Peninsula
and 4" force main to serve existing homes.
Project Drivers:
This project will serve existing homes on the northwest area of Wynnwood
Peninsula.
Mobilization and General Site Preparation
Opinion of Probable Construction Cost
DESCRIPTION
80 gpm (0.115 MGD) Lift Station
4" Force Main
SUBTOTAL:
Estimated Project Total:
Comments:
SUBTOTAL:
CONTINGENCY
SUBTOTAL:
ENG/SURVEY
B-13