HomeMy WebLinkAboutOrdinance No. 2025-2635CITY OF THE COLONY
ORDINANCE NO. 2025- 2(035
AN ORDINANCE OF THE CITY COUNCIL OF THE CITY OF THE
COLONY, TEXAS, AMENDING CHAPTER 8, ARTICLE II, ENTITLED
"IMPACT FEES" BY AMENDING SECTION 8-52 OF THE CODE OF
ORDINANCES, ENTITLED "DEFINITIONS" BY REDEFINING THE
TERM "OFFICE CREEK DRAINAGE CAPITAL IMPROVEMENTS
PLAN"; AMENDING CHAPTER 8, SECTION 8-64 (B) OF THE CODE OF
ORDINANCES, ENTITLED "OFFICE CREEK DRAINAGE IMPACT
FEES" BY UPDATING THE OFFICE CREEK DRAINAGE IMPACT FEES
FOR DRAINAGE FACILITIES BASED UPON AN AMENDED LAND USE
ASSUMPTIONS, AND CAPITAL IMPROVEMENTS PLAN; PROVIDING
A SEVERABILITY CLAUSE; PROVIDING A REPEALER CLAUSE; AND
PROVIDING FOR AN EFFECTIVE DATE.
WHEREAS, Chapter 395 of the Texas Local Government Code authorizes the imposition
and collection of drainage impact fees for eligible capital improvements and facilities; and
WHEREAS, the City of The Colony, Texas, has previously adopted land use assumptions,
capital improvements plan for drainage impact fees; and
WHEREAS, Section 395.052 of the Texas Local Government Code requires the City of
The Colony, Texas, to conduct a periodic update of the land use assumptions and capital
improvements plan; and
WHEREAS, the City of The Colony (hereinafter referred to as the "City") contracted with
Kimley Horn and Associates, Inc., to perform an Office Creek Drainage Impact Fee Update, a
copy of which is attached hereto and incorporated herein as Exhibit A, as amended, which is
attached hereto and incorporated herein for all purposes; and
WHEREAS, in accordance with Chapter 395 of the Texas Local Government Code, as
amended, notices have been published, public hearings have been held and the written
recommendations received concerning land use assumptions and drainage impact fees, which is
identical to the capital improvements plan prepared by a qualified professional engineer; and
WHEREAS, the City Council finds that it is in the best interest of the citizens of the City
to adopt such land use assumptions and drainage impact fees established herein.
NOW, THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY
OF THE COLONY, TEXAS:
SECTION 1. That the findings set forth above are found to be true and correct and are
hereby incorporated into the body of this Ordinance for all purposes as if fully set forth herein.
SECTION 2. That Chapter 8, Section 8-52 of the Code of Ordinances of the City of The
Colony, Texas, entitled "Definitions," is hereby amended as follows:
"See. 8-52. Definitions.
Office Creek Drainage Capital Improvements Plan means a plan contemplated by this article that
identifies Office Creek Drainage Capital Improvements or facility expansions for which storm
water, drainage, and flood control impact fees may be assessed. The said plan is dated September
2025, and entitled "Office Creek Drainage Impact Fee Update," as prepared by Kimley-Horn and
Associates, Inc., and on file in the office of the city secretary.
SECTION 3. That Chapter 8, Section 8-64 of the Code of Ordinances of the City of The
Colony, Texas, entitled "Amount of impact fees," is hereby amended by adding a new subsection
(c), entitled "Office Creek Drainage Impact Fees" which shall read as follows:
"(c) Office Creek drainage impact fees.
(1) The land use assumptions ("LUA") and the Office Creek drainage impact fee update,
which is identical to the capital improvements plan ("CIP"), prepared by Kimley Horn and
Associates, Inc., dated September 2025, which is attached hereto and incorporated herein for all
purposes as Exhibit A, together with all its amendments, exhibits and appendices, are hereby
approved. Exhibit is not set out herein but is on file and shall be maintained in the office of the
city secretary and available for inspection. The LUA and drainage impact fee established herein
shall be reviewed and updated at least every five (5) years.
(2) Schedule of Office Creek drainage impact fees:
(A) The fees established in this section are based on the calculation of the inventory of
lots and tracts, having taken into consideration the size and impervious area on the
benefited property. The city establishes the following rates:
Residential unit.
Each residential single-family unit, town home,
duplex, or manufactured home: $154.87 per service unit
(B) There is hereby established an equivalency unit (hereinafter "ERU") for non-
residential property which is based on an average impervious area of 3,406 square feet per
single-family residential unit, which is as follows:
Non-residential unit:
Each multi -family or non-residential unit: $154.87 per ERU:
An ERU is an equivalent residential unit and is equal to 3,406 square feet of
impervious area."
SECTION 4. An Office Creek drainage impact fee, as provided in Exhibit A and as
authorized by Chapter 395 of the Texas Local Government Code, as amended, is hereby imposed.
The maximum amount of the drainage impact fee that could be assessed within the Service Area
will be determined as provided in ExhibitA. The actual amount of impact fees assessed within the
service area will be determined as provided by in ExhibitA.
SECTION 5. The methodology for drainage impact fees, including the service area,
service units, cost per service unit, and service unit calculation shall be provided in Chapter III of
ExhibitA.
SECTION 6. Drainage impact fee calculations, which shall include maximum assessable
impact fee per service unit, plan for awarding the drainage impact fee credit shall be as provided
in Chapter IV of Exhibit A, as amended.
SECTION 7. This section is adopted pursuant to Chapter 395 of the Texas Local Government
Code, as amended. The provisions of this section shall not be construed to limit the power of the City
to utilize other methods authorized under State law or pursuant to other City powers to accomplish
the purposes set forth herein, either in substitution or in conjunction with this section. Guidelines may
be developed by City Council resolution or otherwise to implement and administer this section.
SECTION 8. It is hereby declared to be the intention of the City Council that the words,
phrases, clauses, sentences, paragraphs and sections of this Ordinance are severable, and if any word,
phrase, clause, sentence, paragraph or section of this Ordinance shall be declared unconstitutional
by the valid judgment or decree of any court of competent jurisdiction, such unconstitutionality shall
not affect any of the remaining words, phrases, clauses, sentences, paragraphs and sections of this
Ordinance, since the same would have been enacted by the City Council without the incorporation of
this Ordinance of any such unconstitutional word, phrase, clause, sentence, paragraph or section.
SECTION 9. Any provision of any prior ordinance of the City, whether codified or
uncodified, which is in conflict with any provision of this Ordinance, is hereby repealed to the extent
of the conflict, but all other provisions of the ordinances of the City, whether codified or uncodified,
which are not in conflict with the provisions of this Ordinance shall remain in full force and effect.
SECTION 10. This Ordinance shall become effective immediately from and after its
passage and publication as required by law.
PASSED AND APPROVED BY THE CITY COUNCIL OF THE CITY OF THE COLONY,
TEXAS, THIS 16" DAY OF DECEMBER 2025.
ATT
Tina Stewart, TRMC, CMC, City Secretary
APPROVED AS TO FORM:
Richard Boyer, Mayor
City of The Colony, Texas
Exhibit A
Office Creek Drainage Impact Fee Update
The Colony, Texas
2025 Office Creek Drainage Impact Fee Update
September 2025
0(ii.nlvv
Prepared for:
The Colony
Prepared by:
Kimley)))Horn
Kimley-Horn and Associates, Inc.
12750 Merit Drive, Suite 1000
Dallas, TX 75240
Phone: 972 7701300
TBPE Firm Registration Number: F-928
Project Number: 061117031
NWFFIW, Office Creek Drainage Impact Fee Update Tl iE
The Colony, Texas COLONY
2025 �� � � �
Table of Contents
Page No.
Executive Summary ...............................................
I. Introduction..........................................................................................................................
II. Drainage Impact Fee Calculation Inputs.............................................................................
2
A. Land Use Assumptions.-.. ................................................................................................................_...
2
B. Capital Improvement Plan......................................................................................................................
4
III. Methodology for Drainage Impact Fees..............................................................................6
A. Service Areas.........................................................................................................................................6
B. Service Units...........................................................................................................................................6
C. Cost Per Service Unit.............................................................................................................................8
D. Cost of the CIP.......................................................................................................................................
8
E. Service Unit Calculation.......................................................................................................................10
IV. Drainage Impact Fee Calculation......................................................................................12
A. Maximum Assessable Impact Fee Per Service Unit...........................................................................12
B. Plan for Awarding the Drainage Impact Fee Credit............................................................................12
V. Sample Calculations..........................................................................................................14
VI. Conclusion.........................................................................................................................15
APPENDICES..........................................................................................................................16
A. Service Area Mapping
B. Conceptual Level Project Cost Projections
C. Hydrologic Modeling Parameters
D. Hydrologic Modeling Output
E. Actual Impact Fees to be Assessed by Land Use
F. Digital Files
Kimley>>)Horn i
Office Creek Drainage Impact Fee Update Tt-i�
The Colony, Texas CC3�.ONY
2025 t � �
List of Tables
Table 1. Capital Improvements Projects............................................................................... 4-5
Table2. Service Unit Calculation..............................................................................................7
Table 3. Capital Improvements Projects — Costs......................................................................9
Table 4. Capital Improvements Projects — Design Flows.......................................................10
Table 5. Maximum Assessable Drainage Impact Fee...........................................................13
List of Examples
Example 1: Development Type - One (1) Unit of Single -Family Housing .............................14
Example 2: Development Type — 5 Acre Commercial Development....................................14
Kimley>>)Horn ii
Executive Summary
Office Creek Drainage Impact Fee UpdateA THE
The Colony, Texas IC( LONY
2025 r+�
Impact Fees are a mechanism for funding the public infrastructure necessitated by new development. They originated
and evolved in Florida, California and other fast-growing municipalities and counties, primarily in the Southern and
Western United States. Across the country, they are used to fund police and fire facilities, parks, schools, roads, and
utilities. In Texas, the legislature has allowed their use for water, wastewater, roadway, and drainage facilities. Impact
Fees are currently being used to fund public drainage, water and wastewater improvements as well as funding roadway
infrastructure in the City of The Colony (City).
In the most basic terms, impact fees are meant to recover the incremental cost of each new unit of development in
terms of new infrastructure needs. In the case of drainage impact fees, the infrastructure need is increased capacity of
drainage facilities to serve future development. The purpose of this Impact Fee Study Update is to identify the fee per
unit of new development necessary to fund these improvements in accordance with the enabling legislation, Chapter
395 of the Texas Local Government Code.
Impact Fees are a one-time fee and are charged only against new development. They are based on the cost of the
capacity improvements necessary to accommodate new growth. For drainage impact fee purposes the City has one
(1) service area for the Office Creek watershed. A service area is a geographic area within which a unique maximum
impact fee is determined. All fees collected within the service area must be spent on eligible improvements within that
same service area.
Impact fees are assessed when a final plat is recorded. The assessment defines the impact of each unit at the time of
platting, according to land use, and may not exceed the maximum impact fee allowed by law. Impact fees are collected
when a building permit is issued. Therefore, funds are not collected until development impacts are introduced to the
City's drainage system. Funds collected within a service area can be used only within the same service area. Finally,
fees must be utilized within 10 years of collection or must be refunded with interest.
Chapter 395 of the Texas Local Government Code stipulates a specific process for the adoption of Impact Fees. An
Advisory Committee is required to review the Land Use Assumptions and CIP used in calculating the maximum fee,
and to provide its findings for consideration by the City Council. The City Council must then conduct a public hearing
on the Land Use Assumptions and CIP before considering an Impact Fee ordinance.
The Impact Fee ordinance is considered separately from the Land Use Assumptions and CIP. The Advisory Committee
must review the Impact Fee ordinance and provide its findings to the City Council. Following receipt of the report by
the Advisory Committee, the City Council is required to conduct at least one public hearing on the Impact Fee ordinance
prior to adoption.
This report includes details of the impact fee calculation methodology in accordance with Chapter 395, the applicable
Land Use Assumptions, and the development of the CIP.
The 2025 maximum assessable drainage impact fee calculated in this report is $154.87 per service unit. This is an
$76.65 decrease from the 2016 fee, which was $231.52.
Kimley>))Horn ;;;
Office Creek Drainage Impact Fee Update THE
The Colony, Texas COLONY
2025 .,, ►��
I. Introduction
Chapter 395 of the Texas Local Government Code (Chapter 395) describes the procedures and regulations that Texas
cities must follow in order to create and implement impact fees within a political subdivision. In 2001, Senate Bill 243
(SB 243) was enacted, redefining the Impact Fee according to Chapter 395 as "a charge or assessment imposed by a
political subdivision against a new development in order to generate revenue for funding or recouping the costs of
capital improvements or facility expansions necessitated by and attributable to the new development."
Chapter 395 mandates that such impact fees be reviewed and updated due to changes in Land Use Assumptions and
Capital Improvements Plan (CIP). Accordingly, updated Land Use Assumptions were prepared by Kimley-Horn and
the City has developed its CIP with which to update the City's Office Creek drainage impact fees. The City has retained
Kimley-Horn to provide professional engineering services for the 2025 update of the Office Creek Drainage Impact Fee
calculation methodology in accordance with Chapter 395 and SB 243. Associated revisions to the Land Use
Assumptions and the City's hydrologic modeling of the watershed have been performed by Kimley-Horn and included
as appendices to this report. The Capital Improvements Plan within the impact fee service area has also been
established with this update.
This report consists of a detailed discussion of the methodology used for the computation of the Office Creek drainage
impact fee. The discussion addresses each of the following components as well as modifications required for the 2025
update:
■ Existing and Fully -Built Out Growth Projections
■ Service Areas
■ Service Units
■ Cost per Service Unit
■ Cost of the Capital Improvements Plan
■ Service Unit Calculation
■ Maximum Assessable Impact Fee per Service Unit
The report also includes a section outlining a plan for awarding the Office Creek drainage impact fee credit. This plan
details the maximum assessable impact fee per service unit that the City may apply under Chapter 395.
Kimley>))Horn
Office Creek Drainage Impact Fee Update �j THE
The Colony, Texas ■■ C( LOONY
2025
II. Drainage Impact Fee Calculation Inputs
A. Land Use Assumptions
Purpose and Overview
In order to assess the drainage impact fee, Land Use Assumptions must be developed to provide a basis for growth
projections within a political subdivision. As defined by Chapter 395, these assumptions include a description of
changes in land use, densities, intensities, and populations within the service area. These assumptions are also useful
to the City in determining the need and timing of capital improvements to serve future development.
Chapter 395 states that the Drainage Impact Fee and Capital Improvements Plan must contain specific enumeration
of "...the projected demand for capital improvements or facility expansions required by new service units projected
over a reasonable period of time, not to exceed 10 years. In the case of the Drainage Impact Fee, this demand is
measured by comparing the existing discharge rates at the location of each improvement with those projected in the
10 -year growth and ultimate conditions. The City anticipates the Office Creek watershed will be fully -built out by the
year 2035.
In accordance with Chapter 395, information from the following sources was compiled: the City of The Colony
Comprehensive Plan — July 2007, the North Central Texas Council of Governments (NCTCOG), and consultation with
City staff.
Kimley-Horn prepared land use assumptions and hydrologic modeling for existing (2025) and fully -built out (2035)
conditions of the watershed.
2. Methodology
Existing and fully -built out land use assumptions were included in the "Roadway Impact Fee Update" study performed
by Kimley-Horn in June 2025. Minor modifications were made to the "Roadway Impact Fee Update" study's land uses
to representthe hydrologic conditions of the Existing and Ultimate development scenarios. These land use assumptions
were used to determine the amount of runoff that is generated in the Office Creek Service Area. Exhibits showing the
existing (2025) and fully -built out (2035) land uses are located in Appendix A.
3. Impact Fee Service Areas
The geographic boundary of the existing impact fee service areas for drainage facilities is shown in Appendix A as
the Office Creek watershed. Portions of the City outside of this service area will not have a Drainage Impact Fee
assessed for new development in the Office Creek watershed and were not considered in this analysis.
Kimley»)Horn
Office Creek Drainage Impact Fee Update THE
The Colony, Texas OLONY
2025
4. Hydrologic Modeling
Kimley-Horn obtained hydrologic modeling of the Office Creek from the previous 2016 Drainage Impact Fee project.
The model included 2016 development conditions and ultimate development conditions in 2026. Kimley-Horn prepared
an existing hydrologic model by revising the City effective modeling's 2016 drainage area delineations, time of
concentrations values, and Curve Numbers based on current development conditions. Kimley-Horn prepared a 2035
(Fully -Built Out) condition model by revising the City effective modeling's ultimate times of concentration values and
Curve Numbers based on fully -built out land use assumptions based on the land use information from the "Roadway
Impact Fee Update" (Kimley-Horn, August 2025).
5. Summary
The Office Creek watershed is projected to be fully built -out within the next ten years, with development consisting of
primarily non-residential land uses and a mixed use areas. The change in development conditions from 2025 to 2035
is not as significant as the 2016 Drainage Impact Fee due to the basin being close to fully -built out conditions in 2025
conditions. A summary of the land use information and hydrologic parameters for the existing and fully -built out
development conditions are been included in Appendix C of this report. Output from the hydrologic modeling is
included in Appendix D of this report. This output summarizes discharge rates in the watershed in existing and fully -
built out conditions. The existing and fully -built out drainage area maps and land use maps can be found in Appendix
A.
Kimley>»Horn
NVIFOF'"'.
B. Capital Improvement Plan
Office Creek Drainage Impact Fee Update THE
The Colony, Texas ® C( LONY
2025
Chapter 395 of the Texas Local Government Code dictates that impact fees "may be imposed only to pay the costs of
constructing capital improvements or facility expansions" within the subject service area. A capital improvement, or a
storm water, drainage, or flood control facility that is owned and operated by the political subdivision, must be listed
within the Capital Improvements Plan in order to be assessed the appropriate drainage impact fee. The City Colony
has identified the City -funded drainage infrastructure improvements that have been constructed or are needed in order
to accommodate ultimate conditions within the Office Creek watershed. The Capital Improvements Plan (CIP) is a list
of these projects. It should be noted that the CIP is a listing of both proposed improvements and existing infrastructure
with available capacity.
The CIP for the Office Creek Drainage Impact Fee compiled for the 2025 Drainage Impact Fee update is shown in
Table 1. This table shows the location and size of each project within the watershed. The CIP was developed with
information from the currently adopted Master Drainage Plan, discussions with City staff, and available information on
existing or under -construction drainage infrastructure. Locations of each Capital Improvement are shown on Figure 4
in Appendix A. Project 21 is included to cover the fee for the development of the CIP and this impact fee study.
Table 1— Capital Improvements Projects
Project Number
Location of
Location of
Length of Improved
Status
Improvement
Crossing
Channel
Morning Star Drive
1
Office Creek
to South Colony
1,350 Linear Feet
Constructed
Channel
Boulevard
Office Creek
Memorial Drive to
2
Upstream Face of
1,950 Linear Feet
Constructed
Channel
Pai a Road
Office Creek
Downstream Face
3
of Paige Road to
1,950 Linear Feet
Constructed
Channel
Memorial Drive
Office Creek
Between Memorial
4
Drive and Blair
350 Linear Feet
Constructed
Channel
Oaks Drive
Channel Excavation
5
Tributary Channel
at Horizon Water
850 Linear Feet
Constructed
Park
Upstream Face of
_
6
Office Creek
South Colony Blvd.
700 Linear Feet
Constructed
Channel
to eastern Sonoma
Grande boundary
Kimley)»Horn
Office Creek Drainage Impact Fee Update
The Colony, Texas
2025
Table 1— Capital Improvements Projects (continued)
CTHE
OLONY
rix � � ►,ate
Project Number
Location of
Location of
Size of Improved
of
Status
Im rovement
Crossing
7
South Colony
At Office Creek
2 - 7'x6' RCB's
Constructed
Boulevard
Crossing
8
Paige Road
North of Memorial
5 - 8'x8' RCB's
Constructed
Drive
Approximately 550'
9
Paige Road
South of Memorial
3 - 60" RCP's
Constructed
Drive
_
Approximately 300'
10
Blair Oaks Drive
South of Cougar
4 -10'x10' RCB's
Constructed
Alley
Constructed
11
Memorial Drive
At Worley Drive
3 - 7'x6' RCB's
12
Memorial Drive
Approximately 1000'
4 - 9'x6' RCB's
Constructed
East of Paige Road
Approximately 100'
13
Memorial Drive
East of Blair Oaks
2 - 8'x5' RCB's
Constructed
Drive
14
Paige/121 Addition
NWC of Paige Road
4 - 8'x4' RCB's
Not Constructed
-- Chevron, USA
and SH 121
Varies
Not Constructed
15
Detention Outfall
Upstream of Blair
Oaks Drive
16
Paige Road
At Office Creek
Varies
Not Constructed
Crossing
17
Memorial Drive
At Office Creek
3 - 7'x6' RCB's
Constructed
Crossin
18
Blair Oaks Drive
At Office Creek
1 -10' x 10' RCB
Constructed
Crossing
19
Impact Fee Study
--
--
Completed
Kimley>»Horn
Office Creek Drainage Impact Fee Update THE
The Colony, TexasC(: LONY MFOO'"
2025 �,h.
III. Methodology for Drainage Impact Fees
A. Service Areas
The service area used in the 2025 Drainage Impact Fee update is shown on Figure 1 in Appendix A and represents
the watershed boundary of Office Creek. This area covers only a portion of the corporate boundary of the City of The
Colony, and also includes areas from the City of Lewisville and the Town of Hebron. While there are portions of the
service area within these other jurisdictions, contributing areas from those municipalities will not be assessed an impact
fee. However, they must be included in the service area as they generate runoff that is conveyed through the facilities
in the Capital Improvements Plan.
B. Service Units
The service unit is a measure of use of the Capital Improvement facilities within the service area or watershed boundary.
For the purposes of the Drainage Impact Fee, it is a measure of the development that occurs within the watershed
compared to the additional drainage infrastructure capacity (in cubic feet per second) necessitated by this development.
The total number of service units within the Office Creek watershed was calculated by totaling the amount of additional
impervious area proposed to be constructed within the next 10 years. The increase in runoff anticipated in the next
ten years is directly attributable to the increase in impervious area, and that increase can be measured with each
proposed development, allowing an equitable application of the impact fee.
The area for a service unit will be defined as the average impervious area for a single family residential lot in the City
of the Colony, approximately 3,406 square feet. Each single family residential property developed will be considered
a service unit, while all other development will be assessed the impact fee for a service unit with each 3,406 square
feet of impervious area proposed.
Table 2 shows the calculation of the total increase in impervious area anticipated per subbasin in the watershed. The
last row of Table 2 shows the calculation for the total number of service units in the service area.
Kimley)))Horn
Office Creek Drainage Impact Fee Update
The Colony, Texas
2025
Table 2 - Service Unit Calculation
�i
COLONY
Subbasin
Area
(ac.)
31.4
%
Impervious
Existing
62
%
Impervious
2035
70
Additional
Impervious
Area ac.)
0001
2.51
00O2
68.5
49
64
10.27
00O3
22.7
35
51
3.63
0004
13.4
76
76
0.00
0005
41.9
61
61
0.00
0006A
33.1
67
67
0.00
0006B
51.4
84
84
0.00
0007
45.8
97
97
0.00
0008
63.7
41
78
23.57
0009
65.3
60
61
0.65
OC10
11.9
43
43
0.00
OC11
11.9
65
65
0.00
OC12
34.4
63
63
0.00
OC13
8.3
37
37
0.00
OC14
2.8
85
85
0.00
OC15
15.6
19
19
0.00
OC16
2.6
69
69
0.00
OC17A
22.4
74
74
0.00
OC17B
79.2
77
79
1.59
OC19
18.8
74
83
1.69
OC20
31.8
67
67
0.00
OC21
14.6
12
12
0.00
OC22
10.2
58
68
1.02
OC23
42.8
24
24
0.00
OC24
34.6
50
60
3.46
OC25
34.7
99
99
0.00
OC26A
10.6
66
66
0.00
OC26B
14.7
62
62
0.00
OC27
18.8
52
72
3.76
OC28
29.1
69
72
0.87
OC29
25.2
64
72
2.01
OC30
39.1
71
1 71
0.00
_
Total Additional Impervious Area (ac.) =
55.03
3,406 square feet impervious area =1 Service Unit
Total Service Units =
703.8
Kimley>»Horn
Office Creek Drainage Impact Fee Update THE
The Colony, Texas A �LoNy
2025 �.
C. Cost Per Service Unit
A critical step in the Drainage Impact Fee process is to establish a cost for each service unit within the watershed. This
cost per service unit reflects the amount paid by a developer per additional impervious area to help fund the
construction of drainage infrastructure within the watershed. In the case of the Drainage Impact Fee, this fee is
calculated so that each developer pays an amount consistent with the infrastructure necessitated by development of
their property.
D. Cost of the CIP
The costs that may be included in the cost per service unit calculation are all of the implementation costs of the Impact
Fee update, as well as project costs for channel, structural, or other drainage infrastructure outlined in the Capital
Improvements Plan. Chapter 395 of the Texas Local Government Code specifies that the allowable costs are
"...including and limited to the:
1. Construction contract price;
2. Surveying and engineering fees;
3. Land acquisition costs, including land purchases, court awards and costs, attorney's fees, and expert witness
fees; and
4. Fees actually paid or contracted to be paid to an independent qualified engineer or financial consultant
preparing or updating the capital improvements plan who is not an employee of the political subdivision."
For projects outlined in the CIP that have already been constructed, the total project cost has been determined through
evaluation of final bid tabs for each respective project. Cost information was obtained from City of The Colony staff and
available cost data associated with projects designed by Kimley-Horn. For proposed improvements within the Office
Creek watershed, opinions of probable cost reflect only conceptual -level opinions or assumptions regarding the future
cost to implement the CIP. Actual costs of construction are likely to change with time, and the engineer cannot
guarantee that proposals, bids, or construction costs will not vary from these opinions. Costs for materials and
equipment are dependent on market and economic conditions that cannot be precisely predicted at this time. In
addition to the costs for the projects in the CIP, a cost has been added for the fees paid for the preparation of the CIP
and drainage impact fee update. A summary of the costs for projects within the Office Creek watershed is shown in
Table 3. Project cost sheets for each individual project has been included in Appendix B of this report.
Kimley>>)Horn
Office Creek Drainage Impact Fee Update
The Colony, Texas
2025
Table 3 — Capital Improvements Projects — Costs
�j Car THE
Project
Location of
Location of Crossing
Length of
Status
Total Construction
Number
Improvement
Improved Channel
Cost
1
Office Creek
Morning Star Drive to South
1350 Linear Feet
Constructed
$708,115
Channel
Colony Boulevard
2
Office Creek
Memorial Drive to Upstream
1950 Linear Feet
Constructed
$340,153
Channel
Face of Paige Road
3 Office Creek
Downstream Face of Paige
1950 Linear Feet
Constructed
$483,269
Channel
Road to Memorial Drive
4
Office Creek
Between Memorial Drive
350 Linear Feet
Constructed
$214,466
Channel
and Blair Oaks Drive
5
Tributary Channel
Channel Excavation at
850 Linear Feet
Constructed
$159,535
Horizon Water Park
Upstream Face of South
6
Office Creek
Colony Blvd. to eastern
700 Linear Feet
Constructed
$122,717
Channel
Sonoma Grande boundary
7
South Colony
At Office Creek Crossing
2 - 7'x6' RCB's
Constructed
$191,340
Boulevard
8
Paige Road
Immediately North of
5 - 8'x8' RCB's
Constructed $439,199
Memorial Drive
9
Paige Road
Approximately 550' South of'3
- 60" RCP's
Constructed
$143,840
Memorial Drive
10
Blair Oaks Drive
Approximately 300' South of
4 -10'x10' RCB's
Constructed
$562,232
Cougar Alley
11
Memorial Drive
At Worley Drive
3 - 7'x6' RCB's
Constructed
$171,668
12
Memorial Drive
Approximately 1000' East of
4 - 9'x6' RCB's
Constructed
$212,928
Paige Road
13
Memorial Drive
Approximately 100' East of
2 - 8'x5' RCB's
Constructed
$80,560
Blair Oaks Drive
14
Paige/121 Addition -
NWC of Paige Road and SH
4 - 8'x4' RCB's
Not Constructed
$5,390,700
- Chevron, USA
121
15
Detention Outfall
Upstream of Blair Oaks
Varies
Not Constructed
$434,900
Drive
16
Paige Road
At Office Creek Crossing
Varies
Not Constructed
$222,400
17
Memorial Drive
At Office Creek Crossing
3 - 7'x6' RCB's
Constructed
$369,123
18
Blair Oaks Drive
At Office Creek Crossing
1 -10'x10' RCB
Constructed
$344,047
19
Impact Fee Study
I --
I Completed
$39,330
Kimley>Morn
Office Creek Drainage Impact Fee Update ATI -IE
The Colony, Texas ;OLONY
2025
E. Service Unit Calculation
The basic service unit for the computation of the City's Drainage Impact Fees is dependent upon the amount of area
that will be converted from a pervious to an impervious surface and the amount of runoff that additional impervious
area will produce over existing conditions. To determine the cost per service unit, it is necessary to project the growth
in development within the watershed for the 10 -year growth period and to estimate the future increase in impervious
surface as discussed earlier in this report.
Kimley-Horn used the land use assumptions and anticipated impervious areas to develop hydrologic models for existing
and ultimate (build -out) conditions based on the City -provided modeling. As described earlier in this report, those
models were used to calculate 100 -year design flows at various locations throughout the service area.
Using the hydrologic models created for each development condition, discharge rates were established at the location
of each improvement outlined in the CIP. Table 4 shows these discharge rates (in cubic feet per second) in each of
the two development scenarios at each of the CIP project locations.
Table 4 - Capital Improvement Projects - Design Flows
Project
Number
1
Hydrologic Model Existing (2025)
Combination Point Condition Flow
0001 244.8
Fully -Built Out (2035)
Condition Flow
247.7
Percent Attributable
to 10 -Year Growth
1.13%
2
Junction -5
2422.5
] 2509.6
3.47%
3
Junction -6.5
3053.8
3164.4
3.50%
4
Junction -9
4477.2
4613.6
2.96%
5
0009
507.2
507.9
0.14%
6
Junction -1
677.0
691.2
1.94%
7
Junction -2
677.0
691.2
1.94%
8
Junction -6.5
3053.8
3164.4
3.50%
9
OC19
129.7
151.1
14.16%
10
Junction -10
5425.0
5565.0
2.51%
11
Junction -4
837.1
854.4
2.02%
12
Junction -14
1200.0
1263.4
5.02%
13
Junction -19
546.3
550.0
0.67%
14
Junction -1613
600.7
602.3
0.27%
15
Junction -12
6117.8
6343.5
3.56%
16
Junction -6.5
3053.8
3164.4
3.50%
17
Junction -14
1200.0
1263.4
5.02%
18
Junction -10
5425.0
5565.0
2.51%
Kimley>»Horn 10
Office Creek Drainage Impact Fee Update THE
}-� s The Colony, Texas OLONY
2025
The assessable impact fee portion of each project is based on the percentage of the capital improvement capacity that
will be necessitated by development within the 10 -year growth period. The 10 -year condition flow is assumed to be
equal to fully -built out condition flow. This percentage, known as Percent of Capacity Attributable to Growth, has been
calculated using the following equation;
Percent Attributable to Fully -Built Out Condition Flow - Existing Condition Flow
10 -Year Growth = Fully -Built Out Condition Flow
In addition to the discharge rates for each development condition, Table 4 also shows the Percent Attributable to
Growth calculated using the equation above. This percentage represents the portion of the respective capital
improvement that can be assessed the drainage impact fee. When the total construction cost of each improvement is
multiplied by this percentage, the total construction cost attributable to growth is established. The sum of these costs
for each project outlined in the CIP yields the total construction cost attributable to growth for the watershed, and was
calculated for the Office Creek watershed to be approximately $217,998. A breakdown of these costs is shown in
Appendix B.
Kimley»)Horn 11
Office Creek Drainage Impact Fee Update THE
The Colony, Texas CdLONY
2025 4,b,-,-"-
IV.
,b,-,-
IV. Drainage Impact Fee Calculation
A. Maximum Assessable Impact Fee Per Service Unit
This section presents the maximum assessable impact fee rate calculated for developments within the Office Creek
watershed. The maximum assessable fee is the allowable cost of the CIP for drainage infrastructure divided by the
total number of service units representing growth attributable to development within the 10 -year period. Many of the
components of this calculation have been presented in previous sections of this report. The purpose of this section is
to outline the computation of the impact fee and demonstrate the guidelines of Chapter 395.
The calculations described in Section III of this report have been performed for every improvement within the Drainage
Impact Fee service area (the Office Creek watershed) and the sum of the all of the Construction Costs Attributable to
Growth have been calculated to determine the total cost of the CIP within the service area. Following this calculation,
the Cost Per Service Unit and the Maximum Assessable Impact Fee Rate is calculated. Table 5 illustrates the steps of
this computation:
LINE 1 in Table 5 is the Total Construction Costs Attributable to Growth within the Office Creek watershed, and is
taken from Figure 4. LINE 2 is the Total Number of Service Units within the basin, and is taken from Table 3. LINE 3,
the Cost Per Service Unit Attributable to Growth, is then calculated by dividing LINE 1 by LINE 2.
B. Plan for Awarding the Drainage Impact Fee Credit
Chapter 395 of the Texas Local Government Code requires the Capital Improvements Plan for Drainage Impact Fees
to contain specific enumeration of a plan for awarding the impact fee credit. Section 395.014 of the Code states:
°(7) A plan for awarding:
(A) a credit for the portion of ad valorem tax and utility service revenues generated by new service
units during the program period that is used for the payment of improvements, including the
payment of debt, that are included in the capital improvements plan; or
(B) In the alternative, a credit equal to 50 percent of the total projected cost of implementing the capital
improvements plan..."
The City has determined that the maximum assessable impact fee per service unit shall be 50% of the total projected
cost of implementing the capital improvements plan. Therefore, LINE 4 of Table 5, the Percent of Fee Recoverable is
equal to 50%. LINE 4 is then multiplied by LINE 3 to yield the Maximum Assessable Impact Fee Per Service Unit (LINE
5), which has been calculated at $154.87.
Kimley*Horn 12
Office Creek Drainage Impact Fee Update
The Colony, Texas
2025
Table 5 — Maximum Assessable Drainage Impact Fee
THE
■� COLONY
,a, -
LINE 1
Total Construction Costs Attributable to Growth
$217'998
From Figure 4 of Appendix A)
LINE 2
Total Number of Service Units*
703.8
(From Table 2
Cost of CIP per Service Unit Attributable to Growth
$309.74
LINE 3
= LINE 1/LINE 2
LINE 4
Percent of Fee Recoverable
50%
(From Chapter 395 of Texas Local Government Code
LINE 5
Maximum Assessable Fee per Service Unit
$154.87
= (LINE 3 * LINE 4)
*Note: One Service Unit is 3,406 square feet of impervious area.
Kimley»)Horn 13
V. Sample Calculations
Office Creek Drainage Impact Fee Update THE
The Colony, Texas `OLONY
2025 za,, �
The following section details two (2) examples of maximum assessable Drainage Impact Fee calculations.
Example 1—
Development Type - One (1) Unit of Single -Family Housing
Drainage Impact Fee Calculation Steps — Example 1
Determine Development Unit and Impervious Area
Step Development Type: 1 Dwelling Unit of Single -Family Detached Housing
1
Number of Service Units:1 Service Unit
Determine Maximum Assessable Impact Fee Per Service Unit
Office Creek Watershed: $154.87
Determine Maximum Assessable Impact Fee
Step Impact Fee = # of Service Units' Max. Fee Per Service Unit
3 Impact Fee =1 * $154.87
Maximum Assessable Impact Fee = $154.87
Example 2 —
Development Type — 5 Acre Commercial Development
Drainage Impact Fee Calculation Steps — Example 2
Determine Development Unit and Impervious Area
Step Development Type: Commercial Development
1 Impervious Area (from plat) —178,596 square feet (82% of 5 acre development)
Number of Service Units = Impervious Area 13,406 square feet
Service Units = 178,596 / 3,406 = 52.4
Step
2
Determine Maximum Assessable Impact Fee Per Service Unit
Office Creek Watershed: $154.87
Determine Maximum Assessable Impact Fee
Step Impact Fee = # of Service Units * Max. Fee Per Service Unit
3 Impact Fee = 52.4 * $154.87
Maximum Assessable Impact Fee = $8,115.19
Kimley>»Horn 14
Office Creek Drainage Impact Fee Update THE
The Colony, Texas OLONY
2025 u. :
VI. Conclusion
The City of the Colony has established a process the City has utilized to implement the assessment and collection of
drainage impact fees in the Office Creek watershed through the adoption of an impact fee ordinance that is consistent
with Chapter 395 of the Texas Local Government Code.
This report establishes the maximum allowable drainage impact fee that could be assessed by the City within the Office
Creek watershed upstream of Main Street. It is intended to serve as a guide to the assessment of drainage impact
fees pertaining to future development and the City's need for drainage improvements to accommodate that growth.
Following the public hearing process, the City Council may establish an amount to be assessed (if any) up to the
maximum established within this report and update the Drainage Impact Fee Ordinance accordingly.
In conclusion, it is our opinion that the data and methodology used in this update are appropriate and consistent with
Chapter 395 of the Texas Local Government Code. That information, as well as the proposed Capital Improvements
Plan, are appropriately incorporated into the process.
Kimley>»Horn 15
APPENDICES
A. Service Area Mapping
Office Creek Drainage Impact Fee Update THE
The Colony, Texas A �;OLO Y
2025 ��� �
B. Conceptual Level Project Cost Projections
C. Hydrologic Modeling Parameters
D. Hydrologic Modeling Output
E. Actual Impact Fees to be Assessed by Land Use
F. Digital Files
Kimley>>)Horn 16
WWFO,Pp�
A. Service Area Mapping
Kimley»)Horn
Office Creek Drainage Impact Fee Update
The Colony, Texas
2025
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The Colony, Texas
2025
B. Conceptual Level Project Cost Projections
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City of The Colony Kimley-Horn and Associates, Inc.
2025 Office Creek Drainage Impact Fee Update Updated: 7/6/2010
Final Construction Cost
Project Information:
Description: Project No. 1
Name:
Office Creek Channel
This project consisted of the construction of
Limits:
Morning Star Drive to South
approximately 1350 linear feet of channel
Percent of Construction Cost +/- : 10%
Colony Boulevard
between Morning Star Drive and South Colony
Improvement Type:
Channel
Boulevard. Construction was completed and paid
Channel Length:
1350 Linear Feet
for by Flournoy Development Company, LLC in
Status:
Constructed
2004. Costs below reflect actual costs paid by
Cost Source:
A
Flournoy Development Company to complete the
LS
$ 14,210
channel improvements.
Notes.
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided
herein are based on the information known to Engineer at this time and represent only the Engineer's
judgment as a design professional familiar with the construction industry. The Engineer cannot and does not
guarantee that proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
Project•
Item Description
Notes:
Final Construction
Cost
Percent of Construction Cost +/- : 10%
$
$
$
466,050
177,665
64,400
Project Cost TOTAL:
No.
Item Description
Quantity
Unit
I Unit Price
Item Cost
100
Pilot Channel
1
LS
$ 14,210
$
14,210
200
Excavation
1
LS
$327,980
$
327,980
300
Temporary Construction Entrance
1
LS
$ 2,000
$
2,000
400
Construction Staking
1
LS
$ 10,000
$
10,000
500
Curlex Erosion Control
1
LS
$ 64,720
$
64,720
600
Weir Structure
1
LS
$ 11,000
$
11,000
700
Channel Bottom Rip Rap
1
LS
$ 28,300
$
28,300
800
Water Line Relocation
1
LS
$ 7,840
$
7,840
Construction Cost Subtotal -I
$
466,050
rige
OrderNo.
Item Description Notes
lQuantityl
Unit i
Unit Price
Item Cost
110
Weir Redesign
1
LS
$ 5,470
$
5,470
120
Sewer Line Encasement
1
LS
$ 5,400
$
5,400
130
Water Line Encasement
1
LS
$ 1,500
$
1,500
140
Additional Rip Rap
1
LS
$ 23,275
$
23,275
150
Traffic Wall
1
LS
$ 17,900
$
17,900
160
Canal Redesign
1
LS
$104,048
$
104,048
170
Reseeding
1
LS
$ 20,072
$
20,072
Change Order Subtotal:1
$
177,665
Notes.
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided
herein are based on the information known to Engineer at this time and represent only the Engineer's
judgment as a design professional familiar with the construction industry. The Engineer cannot and does not
guarantee that proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
Project•
Item Description
Notes:
Item Cost
Construction:
Change Order Items:
Estimated Engineering Fees:
Percent of Construction Cost +/- : 10%
$
$
$
466,050
177,665
64,400
Project Cost TOTAL:
$
708,115
Notes.
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided
herein are based on the information known to Engineer at this time and represent only the Engineer's
judgment as a design professional familiar with the construction industry. The Engineer cannot and does not
guarantee that proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
City of The Colony Kimley-Horn and Associates, Inc.
2025 Office Creek Drainage Impact Fee Update Updated: 7/6/2010
Final Construction Cost
Name: Office Creek Channel This project consisted of the construction of
Limits: Memorial Drive to Upstream approximately 1950 linear feet of channel east of Paige
Face of Paige Road Road between the upstream face of Paige Road and
Improvement Type: Channel the downstream face of Memorial Drive. Construction
Length: 1950 Linear Feet was completed on this project in 2004. Construction
Status: Constructed costs below represent final construction costs paid by
Cost Source: C the developer and the City.
Total Project Cost Summary
Item Description
Notes:
Item Cost
Construction:
$
205,454
Final Construction
Cost
$
32,100
Engineering/Surveying Fees:
25% JNC Total — See Reimbursement Request
$
102,599
No.
Item Description
I Quantity
I Unit
I
Unit Price I
$
Item Cost
100
Mobilization
1
LS
$
12,500
$
12,500
200
Channel Excavation
18,945
CY
$
3.00
$
56,835
400
Pilot Channel
557
LF
$
27.00
$
15,039
500
Rock Rip Rap
82
CY
$
35.00
$
2,870
600
Gabion Drop Structure
1,040
SY
$
44.00
$
45,760
700
Erosion Control
1
LS
$
31,250
$
31,250
800
Erosion Control Matting
300
SY
$
4.00
$
1,200
900
Hvdromulching
8
1 AC
$
5,000
$
40,000
Construction Cost Subtotal:
$
205,454
Total Project Cost Summary
Item Description
Notes:
Item Cost
Construction:
$
205,454
Project Management Fees:
25% JNC Total — See Reimbursement Request
$
32,100
Engineering/Surveying Fees:
25% JNC Total — See Reimbursement Request
$
102,599
Project Cost TOTAL:
$
340,153
Notes:
1. Cost for Mobilization calculated as one-third of the total cost shown on Sheet 2 of Cost Source C.
2. Costs for Channel Excavation calculated using total costs for Channels B and C Excavation on Sheet 2
of Cost Source C and cost for Channel C Excavation on Sheet 3 of Cost Source C.
3. Cost for Rock Rip Rap, Gabion Drop Structure, and Hydrolmulching have been calculated using total
costs shown on Sheet 2 of Cost Source C.
4. Cost for Erosion Control has been calculated as 50% of the total cost shown on Sheet 3 of Cost Source C.
5. Cost for Erosion Control Matting has been calculated using total costs shown on Sheets 2 and 3 of Cost
Source C.
6. Project Management Fees have been included as 25% of the total cost of Project Management reported
in the JNC Reimbursement Request (February, 2005).
7. Engineering/Surveying Fees have been included as 25% of the total cost of Engineering/Surveying
Services reported in the JNC Reimbursement Request (February, 2005).
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided herein
are based on the information known to Engineer at this time and represent only the Engineer's judgment as a
design professional familiar with the construction industry. The Engineer cannot and does not guarantee that
proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
City of The Colony Kimley-Horn and Associates, Inc.
2025 Office Creek Drainage Impact Fee Update Updated: 7/6/2010
Final Construction Cost
Project Information:
Description' Project No. 3
Name:
Office Creek Channel
This project consisted of the construction of
Limits:
Downstream Face of Paige
approximately 1950 linear feet of channel west of Paige
Cost
Item Description
Road to Memorial Drive
Road between the downstream face of Paige Road and
Improvement Type:
Channel
the upstream face of Memorial Drive. Construction was
Length:
1950 Linear Feet
completed on this project in 2004. Construction costs
Status:
Constructed
below represent final construction costs paid by the
Cost Source:
C
developer and the City.
Notes:
1. Cost for Channel Excavation has been calculated as 85% of the total cost shown on Sheet 1 of Cost Source C,
and 85% of the costs shown for Channel A Excavation on Sheets 2 and 3.
2. Cost for Clearing and Grubbing has been calculated as 85% of the total cost shown on Sheet 1 of Cost Source
3. Cost for Erosion Control has been calculated as one-third of the cost shown on Sheet 2 of Cost Source C.
and 42.5% of the costs shown on Sheet 3 of Cost Source C.
4. Costs for Pilot Channel, Rock Rip Rap and Hydromulching have been calculated as 85% of the costs shown
on Sheet 3 of Cost Source C.
5. Cost for Mobilization has been calculated as one-third of the cost shown on Sheet 2 of Cost Source C.
6. Project Management Fees have been included as 25% of the total cost of Project Management reported
in the JNC Reimbursement Request (February, 2005).
7. Engineering/Surveying Fees have been included as 25% of the total cost of Engineering/Surveying
Services reported in the JNC Reimbursement Request (February, 2005).
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided herein
are based on the information known to Engineer at this time and represent only the Engineer's judgment as a
design professional familiar with the construction industry. The Engineer cannot and does not guarantee that
proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
Total Project Cost Summary
Item Description
Notes:
Item Cost
Final Construction
No.
Cost
Item Description
Quantity
I Unit
Unit Price
$
Item Cost
100
Mobilization
1
LS
$
12,500
$
12,500
200
Channel Excavation
24,083
CY
$
2.95
$
71,045
300
Channel Excavation
7,293
CY
$
5.06
$
36,903
400
Channel Excavation
24,083
CY
$
2.06
$
49,611
500
Clearing and Grubbing
6.62
AC
$
1,610
$
10,658
600
Pilot Channel
1,752
LF
$
60
$
105,120
700
Erosion Control
1
LS
$
28,933
$
28,933
800
Rock Rip Rap
202
CY
$
100
$
20,200
900
H dromulching
6.8
AC
$
2,000
$
13,600
Construction Cost Subtotal:
$
348,570
Notes:
1. Cost for Channel Excavation has been calculated as 85% of the total cost shown on Sheet 1 of Cost Source C,
and 85% of the costs shown for Channel A Excavation on Sheets 2 and 3.
2. Cost for Clearing and Grubbing has been calculated as 85% of the total cost shown on Sheet 1 of Cost Source
3. Cost for Erosion Control has been calculated as one-third of the cost shown on Sheet 2 of Cost Source C.
and 42.5% of the costs shown on Sheet 3 of Cost Source C.
4. Costs for Pilot Channel, Rock Rip Rap and Hydromulching have been calculated as 85% of the costs shown
on Sheet 3 of Cost Source C.
5. Cost for Mobilization has been calculated as one-third of the cost shown on Sheet 2 of Cost Source C.
6. Project Management Fees have been included as 25% of the total cost of Project Management reported
in the JNC Reimbursement Request (February, 2005).
7. Engineering/Surveying Fees have been included as 25% of the total cost of Engineering/Surveying
Services reported in the JNC Reimbursement Request (February, 2005).
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided herein
are based on the information known to Engineer at this time and represent only the Engineer's judgment as a
design professional familiar with the construction industry. The Engineer cannot and does not guarantee that
proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
Total Project Cost Summary
Item Description
Notes:
Item Cost
Construction:
Project Management Fees:
Engineering/Surveying Fees:
25% JNC Total — See Reimbursement Request
25% JNC Total — See Reimbursement Request
$
$
$
348,570
32,100
102,599
Project Cost TOTAL:
$
483,269
Notes:
1. Cost for Channel Excavation has been calculated as 85% of the total cost shown on Sheet 1 of Cost Source C,
and 85% of the costs shown for Channel A Excavation on Sheets 2 and 3.
2. Cost for Clearing and Grubbing has been calculated as 85% of the total cost shown on Sheet 1 of Cost Source
3. Cost for Erosion Control has been calculated as one-third of the cost shown on Sheet 2 of Cost Source C.
and 42.5% of the costs shown on Sheet 3 of Cost Source C.
4. Costs for Pilot Channel, Rock Rip Rap and Hydromulching have been calculated as 85% of the costs shown
on Sheet 3 of Cost Source C.
5. Cost for Mobilization has been calculated as one-third of the cost shown on Sheet 2 of Cost Source C.
6. Project Management Fees have been included as 25% of the total cost of Project Management reported
in the JNC Reimbursement Request (February, 2005).
7. Engineering/Surveying Fees have been included as 25% of the total cost of Engineering/Surveying
Services reported in the JNC Reimbursement Request (February, 2005).
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided herein
are based on the information known to Engineer at this time and represent only the Engineer's judgment as a
design professional familiar with the construction industry. The Engineer cannot and does not guarantee that
proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
City of The Colony Kimley-Horn and Associates, Inc.
2025 Office Creek Drainage Impact Fee Update Updated: 7/6/2010
Final Construction Cost
Project Information'.
Description: Project No. 4
Name:
Office Creek Channel
This project consisted of the construction of
Limits:
Between Memorial Drive
approximately 350 linear feet of channel immediately
Cost
and Blair Oaks Drive
downstream of Memorial Drive between Memorial Drive
Improvement Type:
Channel
and Blair Oaks Drive. Construction was completed on
Length:
350 Linear Feet
this project in 2004. Construction costs below represent
Status:
Constructed
final construction costs paid by the developer and the
Cost Source:
C
City.
Notes:
1. Cost for Channel Excavation has been calculated as 15% of cost shown on Sheet 1 of Cost Source C
and 15% of the total costs shown for Channel A Excavation on Sheets 2 and 3.
2. Cost for Erosion Control has been calculated as one-third of the cost shown on Sheet 2 of Cost Source C
and 7.5% of the cost shown on Sheet 3 of Cost Source C.
3. Cost for Clearing and Grubbing has been calculated as 15% of the cost shown on Sheet 1 of Cost Source C.
4. Costs for Pilot Channel, Rock Rip Rap and Hydromulching have been calculated as 15% of the costs shown
on Sheet 3 of Cost Source C.
5. Cost for Mobilization has been calculated as one-third of the cost shown on Sheet 2 of Cost Source C.
6. Project Management Fees have been included as 25% of the total cost of Project Management reported
in the JNC Reimbursement Request (February, 2005).
7. Engineering/Surveying Fees have been included as 25% of the total cost of Engineering/Surveying
Services reported in the JNC Reimbursement Request (February, 2005).
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided herein
are based on the information known to Engineer at this time and represent only the Engineer's judgment as a
design professional familiar with the construction industry. The Engineer cannot and does not guarantee that
proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
Total Project Cost Summary
Item Description
Notes:
Item Cost
Final Construction
Cost
$
$
$
79,767
32,100
102,599
Project Cost TOTAL:
$
214,466
No.
Item Description
I Quantity I
Unit
I
nit Price
Item Cost
100
Mobilization
1
LS
$
12,500
$
12,500
200
Channel Excavation
4,317
CY
$
2.06
$
8,893
300
Channel Excavation
4,317
CY
$
2.95
$
12,735
400
Channel Excavation
1,307
CY
$
5.06
$
6,613
500
Pilot Channel
314
LF
$
60
$
18,840
600
Clearing and Grubbing
1.19
AC
$
1,610
$
1,916
700
Erosion Control
1
LS
$
12,170
$
12,170
800
Rock Rip Rap
36
SY
$
100
$
3,600
900
1.25
AC
I $
2,000
$
2,500
-Hydromulching
Construction Cost Subtotal:
$
79,767
Notes:
1. Cost for Channel Excavation has been calculated as 15% of cost shown on Sheet 1 of Cost Source C
and 15% of the total costs shown for Channel A Excavation on Sheets 2 and 3.
2. Cost for Erosion Control has been calculated as one-third of the cost shown on Sheet 2 of Cost Source C
and 7.5% of the cost shown on Sheet 3 of Cost Source C.
3. Cost for Clearing and Grubbing has been calculated as 15% of the cost shown on Sheet 1 of Cost Source C.
4. Costs for Pilot Channel, Rock Rip Rap and Hydromulching have been calculated as 15% of the costs shown
on Sheet 3 of Cost Source C.
5. Cost for Mobilization has been calculated as one-third of the cost shown on Sheet 2 of Cost Source C.
6. Project Management Fees have been included as 25% of the total cost of Project Management reported
in the JNC Reimbursement Request (February, 2005).
7. Engineering/Surveying Fees have been included as 25% of the total cost of Engineering/Surveying
Services reported in the JNC Reimbursement Request (February, 2005).
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided herein
are based on the information known to Engineer at this time and represent only the Engineer's judgment as a
design professional familiar with the construction industry. The Engineer cannot and does not guarantee that
proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
Total Project Cost Summary
Item Description
Notes:
Item Cost
Construction:
Project Management Fees:
Engineering/Surveying Fees:
25% JNC Total — See Reimbursement Request
250/- JNC Total — See Reimbursement Request
$
$
$
79,767
32,100
102,599
Project Cost TOTAL:
$
214,466
Notes:
1. Cost for Channel Excavation has been calculated as 15% of cost shown on Sheet 1 of Cost Source C
and 15% of the total costs shown for Channel A Excavation on Sheets 2 and 3.
2. Cost for Erosion Control has been calculated as one-third of the cost shown on Sheet 2 of Cost Source C
and 7.5% of the cost shown on Sheet 3 of Cost Source C.
3. Cost for Clearing and Grubbing has been calculated as 15% of the cost shown on Sheet 1 of Cost Source C.
4. Costs for Pilot Channel, Rock Rip Rap and Hydromulching have been calculated as 15% of the costs shown
on Sheet 3 of Cost Source C.
5. Cost for Mobilization has been calculated as one-third of the cost shown on Sheet 2 of Cost Source C.
6. Project Management Fees have been included as 25% of the total cost of Project Management reported
in the JNC Reimbursement Request (February, 2005).
7. Engineering/Surveying Fees have been included as 25% of the total cost of Engineering/Surveying
Services reported in the JNC Reimbursement Request (February, 2005).
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided herein
are based on the information known to Engineer at this time and represent only the Engineer's judgment as a
design professional familiar with the construction industry. The Engineer cannot and does not guarantee that
proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
City of The Colony
2025 Office Creek Drainage Impact Fee Update
Final Construction Cost
Kimley-Horn and Associates, Inc.
Updated: 7/6/2010
Name:
Tributary Channel
This project consisted of the construction of an .40
Limits:
Channel Excavation at
additional channel immediately west of the Horizon
Rock Berm
Horizon Water Park
Water Park. The channel is located along the eastern
Improvement Type:
Channel
side of Paige Road and flows under the 9'x6' RCB
Length:
850 Linear Feet
culvert crossing at the water park. This Improvement
Status:
Constructed
was designed by Halff Associates In 2004 and provides
Cost Source:
E
additional detention volume to the Office Creek
10,274
SY
watershad-
FinalConstruction Cost
No. Item Description
I Quantity
I Unit
Unit Price
$ 145,035
$ 14,500
Item Cost
Rock Berm
67
LF
$
40.00
$
2,680
4" Topsoil
10,274
SY
$
0.75
$
7,706
Hydromulching
10,274
SY
$
0.50
$
5,137
Turf Reinforcement Mat
7,920
SY
$
2.00
$
15,840
Unclassified Channel Excavation
10,864
CY
$
2.00
$
21,728
Concrete Pilot Channel
921.00
SY
$
30.00
$
27,630
Reinforced Concrete Weir
1
LS
$
21,000
$
21,000
Reinforced Concrete Rip Rap
494
SY
$
45.00
$
22,230
Geotextile for Gabion Mattress
402
SY
$
2.00
$
804
Gabion Mattress
338.00
SY
$
60.00
1 $
20,280
Construction Cost Subtotal:
$
145,035
Total• -Cost Summary
Item Description Notes:
Item Cost
Construction:
Engineering/Surveying Fees:
Percent of Construction Cost (+/-): 10%
$ 145,035
$ 14,500
Project Cost TOTAL:J
$ 159,535
Notes:
1. Items 6 & 7 from Cost Source E not included in the calculation above. The subject items are not considered
part of the Impact Fee CIP and cannot be considered in the drainage impact fee calculation.
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided
herein are based on the information known to Engineer at this time and represent only the Engineer's judgment
as a design professional familiar with the construction industry. The Engineer cannot and does not guarantee
that proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
City of The Colony Kimley-Horn and Associates, Inc.
2025 Office Creek Drainage Impact Fee Update Updated: 6/7/2016
Final Construction Cost
Project Information:
Cost
Description., Project No. 6
Name:
Office Creek Channel
This project consisted of the construction of a
No.
Item Description
weir structure, regrading of approximately 700
Limits:
Upstream Face of South Colony
linear feet of channel between South Colony
Blvd. to eastern Sonoma
Boulevard and the eastern edge of Sonoma
$ 3.66
Grande boundary
Grande. Construction was completed and paid
Improvement Type:
Channel
for by Flournoy Development Company, LLC in
Length:
700 Linear Feet
2006. Costs below reflect actual costs paid by
Status:
Constructed
Flournoy Development Company to complete the
Cost Source:
Actual
channel improvements.
Final Construction
Cost
No.
Item Description
Quantit Unit
Unit Price
Item Cost
Concrete Pilot Channel
7,010 SF
$ 3.66
$
25,657
Riprap at Structure
782 SF
1
$ 60
$
46,920
Channel Cut
7,470 CY
$ 2
$
14,940
Weir Structure
1 EA
$ 24,000
$
24,000
Construction Cost
Subtotal:
$
111,517
'Project Cost Summary
Item Description
Notes:
Item Cost
Construction:
$
111,517
Engineering/Survey Fees:
Percent of Construction Cost (+/- : 10%
$
11,200
Project Cost TOTAL:
$
122,717
City of The Colony Kimley-Horn and Associates, Inc.
2025 Office Creek Drainage Impact Fee Update Updated: 7/6/2010
Final Construction Cost
Project Information: Description: Project No. 7
Name: South Colony Boulevard This project consisted of the construction of two 7'x6'
Limits: At Office Creek Crossing Reinforced Concrete Box (RCB) culverts under South
Improvement Type: Structural Colony Boulevard.
Size: 2 - 7'x6' RCB's
Status: Constructed
Cost Source: Actual
Project Cost Summary
Item Description Notes: Allowance
Item Cost
Construction: N/A
$ 173,940
Engineering/Survey Fees: Percent of Construction Cost (+/-): 10%
$ 17,400
Project Cost TOTAL:
$ 191,340
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided herein
are based on the information known to Engineer at this time and represent only the Engineer's judgment as a
design professional familiar with the construction industry. The Engineer cannot and does not guarantee that
proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
City of The Colony Kimley-Horn and Associates, Inc.
2025 Office Creek Drainage Impact Fee Update Updated: 7/6/2010
Final Construction Cost
Project Information:
Quantity I
Description: Project No.
Name:
Paige Road
—8
This project consisted of the construction of five (5) -
Limits:
Immediately North of
8'x8' Reinforced Concrete Box (RCB) culverts under
LF
Memorial Drive
Paige Road. Construction was completed on this
Improvement Type:
Structural
project In 2004. Construction costs below represent
Size:
5 - 8'x8' RCB's
final construction costs paid by the developer to
Status:
Constructed
construct the improvements.
Cost Source:
C
LF
Final Construction Cost
No. Item Description
Quantity I
Unit
I
Unit Price
I
tem Cost
5 - 8'x 8' RCB's
500
LF
$
355
$
177,500
MCW-P Headwall
2
EA
$
25,000
$
50,000
Metal Beam Guard Fence
250
LF
$
31.40
$
7,850
Structural Excavation
3,000
CY
$
6.00
$
18,000
Roadway Demolition
120
CY
$
50
$
6,000
8" Reinforced Concrete Pavement
800
SY
$
39.50
$
31,600
Water Main Relocation
86
LF
$
50
$
4,300
Traffic Control
1
LS
1 $
9,250
1 $
9,250
Construction Cost Subtotal:
$
304,500
Total Project Cost Summary
Item Description
Notes:
Item Cost
Construction:
$
304,500
Project Management Fees:
25% JNC Total — See Reimbursement Request
$
32,100
Engineering/Surveying Fees:
25% JNC Total — See Reimbursement Request
$
102,599
Project Cost TOTAL:
$
439,199
Notes:
1. Items shown on Cost Source C not included in the above calculations have been applied to Projects
3, 4, and 5.
2. Project Management Fees have been included as 25% of the total cost of Project Management reported
in the JNC Reimbursement Request (February, 2005).
3. Engineering/Surveying Fees have been included as 25% of the total cost of Engineering/Surveying
Services reported in the JNC Reimbursement Request (February, 2005).
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided
herein are based on the information known to Engineer at this time and represent only the Engineer's judgment
as a design professional familiar with the construction industry. The Engineer cannot and does not guarantee
that proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
City of The Colony Kimley-Horn and Associates, Inc.
2025 Office Creek Drainage Impact Fee Update Updated: 7/6/2010
Final Construction Cost
Description:Project Information:
Name: Paige Road This project consisted of the construction of three (3)
Limits: Approximately 550' South existing 60" Reinforced Concrete Pipes located
of Memorial Drive approximately 550 feet south of Memorial Drive.
Improvement Type: Structural
Size: 3 - 60" RCP's
Status: Constructed
Cost Source: Actual
Final Construction Cost
No. Item Description
I Quantity I
Unit
IUnit
Price
Item Cost
3 - 60" RCP's
390
LF
$
250
$
97,500
Flared Wingwall
2
EA
$
8,000
$
16,000
Grouted Rock Rip Rap
150
SY
$
60.00
$
9,000
Metal Beam Guard Fence
60
LF
$
30.00
$
1,800
Bridge Rail
100
LF
$
50.00
$
5,000
Unclassified Excavation
360
CY
$
4.00
$
1,440
Construction Cost Subtotal:
$
130,740
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided herein
are based on the information known to Engineer at this time and represent only the Engineer's judgment as a
design professional familiar with the construction industry. The Engineer cannot and does not guarantee that
proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
City of The Colony Kimley-Horn and Associates, Inc.
2025 Office Creek Drainage Impact Fee Update Updated: 7/6/2010
Final Construction Cost
Project Information: Description: Project No. i
Name: Blair Oaks Drive This project consisted of the construction of four (4) -
Limits: Approximately 300' South 10'x10' Reinforced Concrete Box (RCB) culverts under
of Cougar Alley Paige Road. Construction was completed on this project
Improvement Type: Structural In 2004.
Size: 4 - 10'x10' RCB's
Status: Constructed
Cost Source: D
Final Construction Cost
No. Item Description I
Quantity 1
Unit
Unit Price
Percent of Construction Cost (+/-):
Item Cost
4 - 10'x 10' RCB's
300
LF
$
400
$
120,000
Pavement Removal
343
SY
$
10.00
$
3,430
Roadway Grading
57
CY
$
20.00
$
1,140
Structural Excavation
2,446
CY
$
3.00
$
7,338
Unclassified Channel Excavation
13,164
CY
$
3.00
$
39,492
Erosion Control
1
LS
$
6,300
$
6,300
Traffic Control
1
LF
$
50,000
$
50,000
Mobilization
1
LS
$
20,000
$
20,000
TxDOT Parallel Wing Headwall
2
EA
$
66,000
$
132,000
TxDOT Traffic Rail
654
LF
$
70.00
$
45,780
Filter Fabric
771
SY
$
2.00
$
1,542
18" Gabion Mattresses
684
SY
$
61.00
$
41,724
Gabion Basket Toewall
309
LF
$
37.00
$
11,433
Cudex Quickgrass Erosion Control
261
SY
$
3.00
$
783
8"Reinforced Concrete Pavement
342
SY
$
35.00
$
11,970
Hydromulch
1
AC
$
1,250
$
1,250
3" Caliper Trees
22
EA
$
225
$
4,950
Tree Removal
1
LS
$
8,500
$
8,500
Traffic Buttons and Striping
1
LS
$
3,500 1
$
3,500
Construction Cost Subtotal:
$
511,132
Total Project Cost Summary
Item Description
Notes:
Item Cost
Construction:
Engineering/Surveying Fees:
Percent of Construction Cost (+/-):
10%
$ 511,132
$ 51,100
Project Cost TOTAL:
$ 562,232
Notes:
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided herein
are based on the information known to Engineer at this time and represent only the Engineer's judgment as a
design professional familiar with the construction industry. The Engineer cannot and does not guarantee that
proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
City of The Colony Kimley-Horn and Associates, Inc.
2025 Office Creek Drainage Impact Fee Update Updated: 7/6/2010
Final Construction Cost
Project Information: Description: Project No. 11
Name: Memorial Drive This project consisted of the construction of three
Limits: At Worley Drive (3) Tx6' Reinforced Concrete Box culverts
Improvement Type: Structural immediately west of the Intersection of Memorial
Size: 3 - 7'x6' RCB's Drive with Worley Drive.
Status: Constructed
Cost Source: B
Final Construction Cost
No. Item Description
Quantity I
Unit
I Unit Price
Item Cost
7'x6' Reinforced Concrete Box
160
LF
$ 661.50
$
105,840
Sloped Headwalls
2
EA
$ 21,000.00
$
42,000
Construction Staking
1
LS
$ 2,290.00
$
2,290
Silt Fence
795
LF
$ 1.75
$
1,391
Channel Excavation
500
CY
$ 8.66
$
4,330
Sheeting, Shoring, and Bracing
207
LF
$ 1.05
$
217
Construction Cost Subtotal:
$
156,068
Project Cost Summary
Item Description
Notes:
Allowance
Item Cost
Construction:
N/A I
$
156,068
Engineering/Survey Fees:
Percent of Construction Cost (+/-):
10%
$
15,600
Project Cost TOTAL:
$
171,668
Notes:
1. Cost for Construction Staking and Silt Fence are one-third of total costs shown on Cost Source B.
2. Cost for Sheeting, Shoring, and Benching is 50% of total cost shown on Cost Source B.
3. Cost for Channel Excavation calculated using 500 CY of Channel Excavation from total shown on Cost
Source B.
4. Items 1, 2, 4 through 8, and 14 through 16 from Cost Source B not included with Project 12.
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided herein
are based on the information known to Engineer at this time and represent only the Engineer's judgment as a
design professional familiar with the construction industry. The Engineer cannot and does not guarantee that
proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
City of The Colony Kimley-Horn and Associates, Inc.
2025 Office Creek Drainage Impact Fee Update Updated: 7/6/2010
Final Construction Cost
Description:Project Information:
Name: Memorial Drive This project consisted of the construction of four
Limits: Approximately 1000' East of (4) 9'x6' Reinforced Concrete Box culverts located
Paige Road approximately 1000 feet east of the intersection of
Improvement Type: Structural Memorial Drive and Paige Road. Construction of
Size: 4 - 9'x6' RCB's this improvement has not been completed.
Status: Constructed
Cost Source: B
Final Construction Cost
No. Item Description
Quantity 1 Unit
I Unit Price
Item Cost
9'x6' Reinforced Concrete Box Culverts
136 LF
$ 976.50
$
132,804
Sloped Headwalls
2 EA
$26,250.00
$
52,500
Construction Staking
1 LS
$ 2,289.00
$
2,289
Silt Fence
793 LF
$ 1.75
$
1,388
Channel Excavation
500 CY
$ 8.66
$
4,330
Sheeting, Shoring, and Bracing
207 LF
$ 1.05
$
217
Construction Cost Subtotal:1
$
193,528
Project Cost Summary
Description Notes:
Allowance
Item Cost
Construction:
N/A 1
$
193,528
Engineering/Survey Fees: Percent of Construction Cost +/- :
10%
$
19,400
Project Cost TOTAL:
$
212,928
Notes:
1. Cost for Construction Staking and Silt Fence are one-third of total costs shown on Cost Source B.
2. Cost for Sheeting, Shoring, and Benching is 50% of total cost shown on Cost Source B.
3. Cost for Channel Excavation calculated using 500 CY of Channel Excavation from total shown on Cost
Source B.
4. Items 1, 2, 4 through 8, and 14 through 16 from Cost Source B not included with Project 13.
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided herein
are based on the information known to Engineer at this time and represent only the Engineer's judgment as a
design professional familiar with the construction industry. The Engineer cannot and does not guarantee that
proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
City of The Colony Kimley-Horn and Associates, Inc.
2025 Office Creek Drainage Impact Fee Update Updated: 7/6/2010
Final Construction Cost
Information:
Description:Project
Name:
Memorial Drive
This project consisted of construction of two (2)
Limits:
Approximately 100' East of Blair 8'x5' Reinforced Concrete Box (RCB) culverts on
Quantity
Oaks Drive
Memorial Drive approximately 100' East of Blair
Improvement Type:
Structural
Oaks Drive. Construction of the project was
Size:
2 - 8'x5' RCB's
completed In 2004.
Status:
Constructed
25
Cost Source:
D
Final Construction Cost
No. Item Description
Quantity
I Unit
Unit Price
Item Cost
Metal Beam Guard Fence
75
LF
$
25
$
1,875
SGT Railing End Section
1
EA
$
2,300
$
2,300
TAS Railing End Section
1
EA
$
500
$
500
2 - 8'x 5' RCB's
101
LF
$
475
$
47,975
Parallel Wingwall
1
LS
$
11,000
$
11,000
Flared Wingwall
1
LS
$
5,000
$
5,000
Grouted Rock Rip Rap
125
SY
$
65
$
8,125
Erosion Control
1
LS
1 $
1,160
$
1,160
Construction Cost Subtotal:
$
73,260
Project Cost Summary
Item Description
Notes:
Allowance
Item Cost
Construction:
N/A
$
73,260
Engineering/Survey Fees:
Percent of Construction
Cost (+/-):
10%
$
7,300
Project Cost TOTAL:
$
80,560
Notes:
1. Cost for Metal Beam Guard Fence is one-third of total cost shown on Cost Source D.
2. Costs for SGT and TAS Railings are one-third of total cost shown on Cost Source D.
3. Cost for Erosion Control is one-third of total cost shown on Cost Source D.
4. Cost for Grouted Rock Rip Rap is one-third of total cost shown on Cost Source D.
5. Cost for 8'x5' RCB's are 50% of the total cost shown on Cost Source D.
6. Items shown on Cost Source D not included in Projects 11 and 14 through 16 apply to
associated paving improvements and cannot be included in drainage impact fee
calculations.
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided herein
are based on the information known to Engineer at this time and represent only the Engineer's judgment as a
design professional familiar with the construction industry. The Engineer cannot and does not guarantee that
proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
City of The Colony Kimley-Horn and Associates, Inc.
2025 Office Creek Drainage Impact Fee Update Updated: 8/18/2025
Project Cost Projection
nit
Information:
Item Cost
Description:Project
Name:
Paige/121 Addition — Chevron,
This project consists of replacing the existing 8'x'4
$ 600
USA
Reinforced Concrete Box culvert under the Paige/121
Limits:
NWC of Paige Road and SH 121
Addition (Chevron Station) with four (4) 8'x4' RCBs. The
Improvement Type:
Structural
crossing at SH 121 will be constructed by TxDOT, while
Size:
4 - 8'x4' RCB's
improvements downstream shall be constructed in
Status:
Not Constructed
future phases of development by the City of The Colony.
Cost Source:
Projected
Construction
Cost Projection
Item Description Quantity 11
nit
Unit Price
Item Cost
No.
Project Cost TOTAL:
8' x4' RCB 2,970
LF
$ 600
$ 1,782,000
Remove Existing Concrete Pavement 2,500
SY
$ 18
$ 45,000
Grading and Subgrade Preparation 400
CY
$ 50
$ 20,000
Structural Excavation and Soil Export/Haul off 4,200
CY
$ 60
$ 252,000
Remove and Replace with CIP Junction Box 1
LS
$ 400,000
$ 400,000
Remove and Replace Flared Wingwall 1
EA
$ 300,000
$ 300,000
Place Reinforced Conc. Pvmt + Flex Base 2,500
SY
$ 80
$ 200,000
Grouted Rip Rap at Headwall 140
CY
$ 320
$ 44,800
Construction
Cost Subtotal:
$ 3,043,800
�.Jor ConstructionComponent _
No. item Description Notes Allowance Item Cost
Mobilization +/-
10%
$ 304,400
Traffic Control +/-
10%
$ 304,400
Erosion Control +/-
5%
$ 152,200
Utility Relocation +/-
15%
$ 456,600
Allowance Subtotal:
$ 1,217,600
Construction and Allowance Subtotal:
$ 4,261,400
Construction Contingency (+/-); 1 15%
$ 639,200
Construction Cost TOTAL:
$ 4,900,600
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided herein are
based on the information known to Engineer at this time and represent only the Engineer's judgment as a design
professional familiar with the construction industry. The Engineer cannot and does not guarantee that proposals, bids, or
actual construction costs will not vary from its opinions of probable costs.
Item Cost
Project Cost Summary
Item Description Notes: Allowance
Construction:
Engineering/Surveying Fees: Percent of Construction Cost (+/-):
N/A
10%
$ 4,900,600
$ 490,100
Project Cost TOTAL:
$ 5,390,700
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided herein are
based on the information known to Engineer at this time and represent only the Engineer's judgment as a design
professional familiar with the construction industry. The Engineer cannot and does not guarantee that proposals, bids, or
actual construction costs will not vary from its opinions of probable costs.
City of The Colony Kimley-Horn and Associates, Inc.
2025 Office Creek Drainage Impact Fee Update Updated: 8118/2025
Project Cost Projection
Project Information: Description: Project No. 15
Name: Detention Outfalls This project consists of the construction of flow
Limits: Upstream of Blair Oaks Drive restrictor devices upstream of Blair Oaks Drive and
Improvement Type: Structural along Office Creek to take advantage of available
Size: Varies volume in the channel for detention.
Status: Not Constructed
Cost Source: Projected
Construction Cost Projection
I
Item Cost
Construction: N/A
$ 362,400
No. I Item Description
I Quantity 1 Unit Unit Price 1
Item Cost
Blair Oaks Drive Structure
1 1 LS $ 225,000 1
$
225,000
Construction Cost Subtotal:J
$
225,000
No. Item Description
Notes Allowance
Item Cost
Mobilization
+1- 20%
$
45,000
Erosion Control
+/- 5%
$
11,300
Traffic Control
+/_ 5%
$
11,300
Utility Relocation
+/- 10%
$
22,500
Allowance Subtotal:
$
90,100
Construction and Allowance Subtotal:
$
315,100
Construction Contingency (+/-): 15°Ib
$
47,300
Construction Cost TOTAL:
$
362,400
Project Cost Summary
Item Description Notes: Allowance
I
Item Cost
Construction: N/A
$ 362,400
Engineering/Surveying Fees: Percent of Construction Cost (+/-): 20%
$ 72,500
Project Cost TOTAL:
$ 434,900
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided herein
are based on the information known to Engineer at this time and represent only the Engineer's judgment as a
design professional familiar with the construction industry. The Engineer cannot and does not guarantee that
proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
City of The Colony Kimley-Horn and Associates, Inc.
2025 Office Creek Drainage Impact Fee Update Updated: 8/18/2025
Project Cost Projection
Project Information: - Description. Project No. 16
Name: Paige Road This project consists of upgrading an Inline
Limits: At Office Creek Crossing stepped weir at the intersection of office Creek and
Improvement Type: Structural Paige Road for low flow events.
Size: Varies
Status: Not Constructed
Cost Source: Projected
The Engineer has no control over the cost of labor, materials, equipment, or over the Contractor's methods of
determining prices or over competitive bidding or market conditions. Opinions of probable costs provided herein
are based on the information known to Engineer at this time and represent only the Engineer's judgment as a
design professional familiar with the construction industry. The Engineer cannot and does not guarantee that
proposals, bids, or actual construction costs will not vary from its opinions of probable costs.
City of The Colony Kimley-Horn and Associates, Inc.
2025 Office Creek Drainage Impact Fee Update Updated: 8/2512025
Project Cost Projection
Description:Project Information:
Name: Memorial Drive This project consisted of the construction of 3 -
Limits: At Office Creek Crossing rxS' Reinforced Concrete Box (RCB) culverts at
Improvement Type: Structural the Intersection of Office Creek and Memorial
Size: 3 - 7'x6' RCB's Drive to serve the Memorial Drive Expansion.
Status: Constructed
Cost Source: G
Notes:
1. Cost for Construction Staking is 20% of total costs shown on Cost Source G.
2. Cost for Mobilization & Site Preparation includes 2 of the 17 stations shown on Cost Source G.
3. Cost for trench safety for storm drain pipe is calculated using 110 LF.
Construction
Cost Projection
No.
Item Description I
Quantity
Unit
1 Unit Price
Item Cost
IA -1
Construction Staking
1
EA
$
2,500
$
2,500
IA -2
Mobilization & General Site Preparation
2
STA
$
3,755
$
7,510
IA -3
Trench Safety for Storm Drain Lines
110
LF
$
5
$
550
IA -6
Stabilized Construction Entrance
1
EA
$
2,500
$
2,500
IA -8
Solid Sod
6,020
SY
$
9.20
$
55,384
IA -9
Rock Check Dam
40
LF
$
67
$
2,680
IA -10
Hydromulch Seeding
9,784
SY
$
4.70
$
45,985
IA -11
Soil Retention Blanket
7,403
SY
$
1.20
$
8,884
IA -16
Remove Existing Headwall
1
EA
$
1,600
$
1,600
IA -19
Removal and Disposal of Unsuitable Material; Replace
100
CY
$
83
$
8,300
IA -30
3 - Tx 6' RCB
110
LF
$
1,120
$
123,200
IA -32
Concrete Headwall w/ Flared Wings for 3 - 7'x 6' RCBs
1
EA
$
41,200
$
41,200
IA -33
2.4" Grouted Rip Rap
271
Cy
$
130
$
35,230
Construction Cost Subtotal:
$
335,523
Total Project
Cost Summary
Item Description Notes:
Item Cost
Construction:
$
335,523
Engineering/Surveying Fees: Percent of Construction Cost (+1-):
10%
$
33,600
Project Cost TOTAL:
$
369,123
Notes:
1. Cost for Construction Staking is 20% of total costs shown on Cost Source G.
2. Cost for Mobilization & Site Preparation includes 2 of the 17 stations shown on Cost Source G.
3. Cost for trench safety for storm drain pipe is calculated using 110 LF.
City of The Colony Kimley-Horn and Associates, Inc.
2025 Office Creek Drainage Impact Fee Update Updated: 8/18/2025
Final Construction Cost
Description:
,Project Information: Name: Blair Oaks Drive This project consisted of replacing the existing 2 -
Limits: At Office Creek Crossing 84" CMPs and existing headwalls with 1 -10' x 10'
Improvement Type: Structural RCB and installing parallel headwalls.
Size: 1 -10'x10' RCB
Status: Constructed
Cost Source: F
Final Construction
No.
Cost
Item Description
I Quantity I
Unit
I Unit Price
I
Item Cost
IA -01
Construction Staking
1
EA
$
6,400
$
6,400
IA -02
Mobilization & General Site Preparation
1
EA
$
30,000
$
30,000
IA -03
Trench Safety for Storm Drain Lines
84
LF
$
1.50
$
126
IA -13
Sawcut and Remove EX. Conc Pvmt.
9,767
SF
$
0.80
$
7,814
IA -15
Remove Existing Headwall
2
EA
$
1,545
$
3,090
IA -16
Remove Existing Storm Drainage Pipe
225
LF
$
21
$
4,759
IA -19
Channel Excavation
805
CY
$
20
$
16,100
IA -32
10'x 10' RCB
84
LF
$
1,115
$
93,660
IA -36
Parallel Headwall PW -1
2
EA
$
50,000
$
100,000
IA -37
Remove Existing Metal Beam Guard Fence
200
LF
$
17
$
3,400
IA -39
24" Grouted Rip Rap
491
CY
I $
78
1 $
38,298
Construction Cost Subtotal:
I $
303,647
Total Project Cost Summary
Item Description Notes:
Item Cost
Construction:
Engineering/Surveying Fees:
Percent of Construction Cost (+/-):
10%
$ 303,647
$ 30,400
Project Cost TOTAL:
$ 334,047
Notes:
1. Cost for Construction Staking, Mobilization & Site Preparation are one-third of total costs shown on Cost Source F.
2. Cost for trench safety for storm drain pipe is calculated using 84 LF from Feb. 2019 record drawings.
3. Cost for sawcut and remove existing concrete pavement is calculated using 9,767 SF from Feb. 2019 record drawings.
4.Cost for removal of existing storm drainage pipe is calculated using 225 LF from Feb. 2019 record drawings.
5.Cost for removal of existing metal beam guard fence is calculated using 200 LF from Feb. 2019 record drawings.
1�
Office Creek Drainage Impact Fee Update
The Colony, Texas
2025
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wvppp,pp� Office Creek Drainage Impact Fee Update
The Colony, Texas
2025
D. Hydrologic Modeling Output
Kimley>>)Horn
COLONY
2025 (Existing) Conditions Hydrologic Madel Output
rola is Model Output
100-YCSrEvent
100 -Year Event
Hydrologic Element
Drainage Area (so mi) I
Peak Discharge (cfs
Junction -1
0.1561
677.7
Junction -10
1.3108
5425.0
Junction -ll
1.3856
5741.2
Junclion,12
1.4861
6117.8
Junction -l3
0.2036
784.1
Junc60r}.14
0.3031
1200.0
Junctior,15
0.0863
391.8
Junction -16
0.1881
727.1
Junction -16B
0.1587
600.7
Junction -17
0.2464
976.0
Jundon-18
0.1083
498.9
Junction -19
0.1249
546.3
Juncuon-2
0.1561
677.7
Junctlon-a
0.1915 1
837.1
Junction -5
0.5809
2422.5
Juncllon5
0.5994
2509.3
Junction -6.5
0.7200
3053.8
Junction -7
0.7737
3201.2
Junction -7.5
0.8111
3359.0
Jundon-8
1.0575
4318.6
Jundtlon-9
1.0962
4477.2
OCOt
0.0491
244.8
00O2
0.1070
454.7
00O3
0.0354
159.9
0004
0.0209
106.4
0005
0.0654
292.3
0006A
0.0517
246.9
0006B
0.0804
361.0
0007
0.0715
348.2
0005
0.0995
416.3
0009
0.1020
507.2
OC10
0.0186
73.8
OC11
0.0185
92.7
OC12
0.0537
190.4
OC13
0.0130
52.4
OC14
0.0044
20.4
OC15
0.0244
114.0
OC16
0.0041
20.7
OC17A
0.0350
168.1
OC17B
0.1237
549.7
OC19
0.0294
129.7
OC20
0.0498
241.2
OC21
1 0.0228
91.4
OC22
0.0159
69.2
OC23
0.0668
314.6
OC24
0.0540
229.8
OC25
0.0543
285.4
OC26A
0.0166
79.1
OCM
0.0229
106.0
OC27
0.0294
129.6
OC28
0.0454
192.6
OC29
0.0394
128.9
OC30
0.0611
308.7
P -0006A
0.0517
163.6
P-OC17A
0.0350
73.5
P-OC26A
0.0166
60.3
R -0006A
0.0517
163.6
R-OC17A
0.0350
1 73.5
R-OC17B
0.1587600.7
602.3
R-OC26A
0.0166
60.3
2035 (Fully Built Out) Conditions H
rola is Model Output
100 -Year Event
Hydrologic Element
Drainage Area Isq mi Peak Discharge cfs
Junction -1
0.1561
691.2
Junction -10
1.3108
5565.0
Junction -11
1.3856
5891.8
Junction -12
1.4 861
6343.5
Junction -13
0.2036
784.1
Junction -14
0.3031
1263.4
Ju 15
0.0863
391.8
Junction -16
0.1881
718.3
Junction -16B
0.1587
602.3
Junction -17
0.2464
975.0
Junction -16
0.1083
502.5
Junction -19
0.1249
550.0
Junction -2
0.1561
691.2
Junction4
0.1915
854.4
Junction -5
0.5809
2509.6
Junctions
0.5994
2596.4
Junction -6.5
0.7200
3164.4
Junction -7
0.7737
3304.2
Junction -7.5
0.8111
3473.4
Junction -8
1.0575
4444.5
Junction -9
1.0962
4613.6
OCO1
0.0491
247.7
00O2
0.1070
465.1
00O3
0.0354
164.1
0004
0.0209
106.4
0005
0.0654
292.3
0006A
0.0517
246.9
0006B
0.0804
361.0
0007
0.0715
348.2
0008
0.0995
489.8
0009
0.1020
507.9
OC1O
0.0186
90.2
OC11
0.0185
92.7
2C12
0.0537
190.4
OC13
0.0130
62.5
OC14
0.0044
20.4
OC15
0.0244
114.0
OC16
0.0041
20.7
OC17A
0.0350
168.1
OC17B
0.1237
551.4
OC19
0.0294
151.1
OC20
0.0498
241.2
0021
0.0228
105.4
OC22
0.0159
70.2
OC23
0.0668
314.6
OC24
0.0540
233.3
OC25
0.0543
285.4
OC26A
0.0166
79.1
OC26B
0.0229
106.0
OC27
0.0294
148.8
OC28
0.0454
193.5
OC29
0.0394
167.9
OC30
0.0611
308.7
P -0006A
0.0517
163.6
P-OC17A
0.0350
73.5
P-OC26A
0.0166
60.3
R -0006A
0.0517
163.6
R-OC17A
0.0350
73.5
R-OC17B
0.1587
602.3
R-OC26A
0.0166
60.3
Office Creek Drainage Impact Fee Update Tr-rr.:
The Colony, Texas COLONY
2025
E. Actual Impact Fees to be Assessed by Land Use (As
Adopted by Ordinance # }
Kimley)>)Horn
F. Digital Files
Kimley»)Horn
Office Creek Drainage Impact Fee Update
The Colony, Texas
2025
THE