03.12.24 Town Council Meeting Presentation Work SessionWelcome to the March 12, 2024,
Prosper Town Council Work Session
Call to Order/Roll Call
Executive Session
Section 551.087 – To discuss and consider economic development incentives and all
matters incident and related thereto.
Section 551.072 – To discuss and consider purchase, exchange, lease or value of real
property for municipal purposes and all matters incident and related thereto.
Section 551.074 – To discuss and consider personnel matters and all matters incident and
related thereto.
Section 551.071 – Consultation with the Town Attorney to discuss legal issues associated
with any agenda item.
Section 551.071 – To consult with the Town Attorney regarding Chapter 42 of the Texas
Local Government Code and Extraterritorial Jurisdiction land use and development
issues, and all matters incident and related thereto.
Section 551.074 - To discuss and consider personnel matters, including the annual
evaluation of the Town Manager, Town Attorney and the Municipal Judge, and all matters
incident and related thereto.
The Town Council will reconvene after Executive
Session.
Reconvene into Work Session
Agenda Item 1.
Discussion regarding the Upper Trinity Regional Water District
(UTRWD) Doe Branch Water Reclamation Plant expansion. (CE)
Expansion of the Doe Branch Water
Reclamation Plant
Little Elm, Texas
Current Capacity – 4 MGD
Permitted to 20 MGD
Doe Branch Water Reclamation Plant (WRP)
Projects Included in Agreement
•Doe Branch Plant Expansion to 8 MGD
•Estimated Cost $209,892,554
•Prosper share $104,946,277
•Doe Branch Interceptor Line
•Estimated Cost $30,000,000
•Prosper share $15,000,000
Doe Branch WRP Flows & Trends
0
2
4
6
8
10
12
N-16A-17S-17F-18J-18D-18M-19O-19M-20A-20J-21J-21N-21A-22S-22F-23J-23D-23M-24O-24M-25A-25J-26J-26N-26A-27S-27F-28J-28D-28M-29O-29M-30A-30J-31Flow (mgd)Permitted Plant Capacity
Phase 3 Operational
TCEQ Notice of Violation
issued for flow exceeding
capacity
Doe Branch WRP - - Prosper Flows
Phase 2 Operational
(Nov. 2021)
Phase 3 Preliminary
Engineering Started
(Sept. 2022)
Final Design
Contract
Awarded
(Feb. 2023)
CMAR
Selected
(June 2023)
Doe Branch WRP expansion budget estimates
Description
Conceptual
Estimate
(8.0 mgd)
CMAR 30%
(8.0 mgd)
CMAR 30%
Phase 3A
(8.0 mgd phased)
CMAR 30%
Phase 3B
(8.0 mgd phased)
AACE Estimate Class 4 3 3 3
Direct costs $ 74,524,302 $ 136,284,270 $ 105,651,332 $ 44,050,577
Indirect costs $ 72,237,174 $ 50,162,138 $ 38,887,075 $ 16,213,691
Estimated
construction cost
$ 146,761,476 $ 186,446,408 $ 144,538,407 $ 60,264,268
Engineering & PM -$23,446,146 $30,949,584
Total Cost (8.0 MGD)-$209,892,554 $235,752,259
Notes:
1)OPCC is before design and without plans and specs
2)Based on 30% design plans
Key factors impacting project cost
•Higher waste load - - Flow is not the only factor.
•Building new facilities next to existing. Not modifying existing.
•Engineer’s estimates differ from CMAR cost estimates.
•Construction costs continue to escalate
Conceptual Estimate 30% CMAR Estimate
•Based on historical Information
•Lags approximately 8-12 months
from current conditions
•Industry indexes (averages)
•Based on general concepts -- not
detailed design
•Current market conditions
•Estimates based on active projects
and recent bids
•Real time local escalation
•Based on detailed design -- 30%
Design Drawings
Wastewater Treatment Construction Costs
Project Estimate or
Award Date
Construction
Cost ($)
Design/
Expansion
capacity (mgd,
AADF)
Unit
construction
cost ($ /
gallon)
Comments
Bids
The Colony Stewart Creek
WWTP Expansion Ph. 1 + 2A
2015
2020
$30,329,266
($17,797,000
+$12,532,226)
0.9 $ 33.70 Expand from 3.6 mgd to 4.5 mgd
and new dewatering facility in
phases
NTMWD Sister Grove WWRF 2020 $368,192,252 16 $ 23.01 CMAR including fees, EBPR
process similar to DB
Celina Legacy Hills WRF 2023 $33,051,795 0.95 $ 34.79 SBR does not have clarifiers
Estimates
Hutto WWTP 2023 $143,654,226 6 $ 23.94 90% CMAR cost model
UTRWD Doe Branch WRF Ph. 3 2023 $186,446,408 8 $ 23.31 CMAR 30% including fees, New
plant with dewatering
UTRWD Doe Branch WRF Ph. 3A 2023 $144,538,407 4 $ 36.13 Similar outcome as the Colony,
overall cost increases
Current Financing Plan
•Approximately $6.1M transferred
•Plant Expansion - Issue $55M in CO’s over next two years
•Doe Branch Interceptor - Issue $7.4M in CO’s over next two years
•Remainder based on final costs
•Will work with UTRWD on financing options
•Projections/Impact Fee Study completed by the end of the year.
•Amended Agreement – 26 March 2024
•Recommend subscribing to 3.125 MGD (Total 4.125 MGD)
•3 MGD Additional Capacity
•.125 MGD Existing Capacity
•1 MGD Unsubscribed Capacity
Adjourn