HomeMy WebLinkAboutItem 17 - Waste Water Treatment PlantMEMO TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM: BRUNO RUMBELOW, CITY MANAGER
MEETING DATE: JULY 3, 2018
SUBJECT: APPROVAL OF ENGINEERING SERVICES CONTRACT AMENDMENT —
WASTEWATER TREATMENT PLANT DEWATERING IMPROVEMENTS
AND APPROPRIATION ORDINANCE
RECOMMENDATION: City Council to consider an amendment to the Engineering Services
Contract with Garver LLC for the design of a second dewatering screw
press at the Wastewater Treatment Plant and process improvements at
the Hilton Lift Station and consider an ordinance appropriating funds for
engineering services.
FUNDING SOURCE: Upon approval, funds in the amount of $111,740 will be available in the
Utility Enterprise Capital Fund Account 201-48940-534-000-170001-2.
BACKGROUND: On November 7, 2017 the City Council authorized an engineering services
agreement with Garver LLC, to design a new dewatering screw press and
retain the existing belt filter press as an emergency backup. Dewatering is
a necessary treatment process to allow landfilling of solids generated from
the treatment process.
During the design, it was concluded that the existing belt press could not
be accommodated in the building due to space constraints. As such, staff
recommends adding a second screw press to be included in the project.
The second screw press and the redundancy provided are important
because the system is an integral part of the treatment process and the
process is hard on the equipment which makes a backup necessary.
In addition, Garver LLC will also provide analysis and recommendations
for treating the effluent waste water from the Hilton Force Lift Station into
the 3 1/2 mile long 24" force main. Due to the long holding times of the
wastewater within the force main, the waste becomes corrosive and
impacts the dewatering process.
The additional engineering services includes the design for the second
screw press, associated construction phasing plans, and the
reccomendations associated with the Hilton Lift Station.
Staff expects to bring a construction contract to the Clty Council this
November for consideration with the project operational in December of
2019.
Staff recommends approval
ORDINANCE NO. 2018-056
AN ORDINANCE OF THE CITY COUNCIL OF THE CITY OF
GRAPEVINE, TEXAS, REVISING THE ADOPTED CAPITAL
IMPROVEMENTS BUDGET FOR THE FISCAL YEAR
ENDING IN 2018; APPROPRIATING FUNDS FROM THE
UTILITY ENTERPRISE CAPITAL FUND; DECLARING AN
EMERGENCY AND PROVIDING AN EFFECTIVE DATE
WHEREAS, the City Council of the City of Grapevine desires to install a dewatering
screw press at the Wastewater Treatment Plant; and
WHEREAS, funding for the design phase services forthe dewatering improvements
is not currently included in the Fiscal Year 2017-2018 Capital Improvements Plan Budget;
and
WHEREAS, all constitutional and statutory prerequisites for the approval of this
ordinance have been met, including but not limited to the Open Meetings Act and Chapter
211 of the Local Government Code; and
WHEREAS, the City Council deems the adoption of this ordinance to be in the best
interests of the health, safety, and welfare of the public.
NOW THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF
GRAPEVINE, TEXAS:
Section 1. That all matters stated hereinabove are found to be true and correct
and are incorporated herein by reference as if copied in their entirety.
Section 2. That the City Council hereby authorizes an amount of $111,740 be
appropriated from the Utility Enterprise Capital Fund for dewatering improvements and
design services associated with installation of a screw press at the wastewater treatment
plant.
Section 3. That a copy of the revised Fiscal Year 2017-2018 Capital
Improvements Plan budget document shall be kept on file in the office of the City Secretary
and on the City of Grapevine website.
Section 4. That the terms and provisions of this ordinance shall be deemed to be
severable, and that if the validity of any section, subsection, word, sentence or phrase
shall be held to be invalid, it shall not affect the remaining part of this ordinance.
Section 5. That the fact that the present ordinances and regulations of the City of
Grapevine, Texas, are inadequate to properly safeguard the health, safety, morals, peace
and general welfare of the inhabitants of the City of Grapevine, Texas, creates an
emergency for the immediate preservation of the public business, property, health, safety
and general welfare of the public which requires that this ordinance shall become effective
from and after the date of its final passage, and it is accordingly so ordained.
PASSED AND APPROVED BY THE CITY COUNCIL OF THE CITY OF
GRAPEVINE, TEXAS on this the 3rd day of July, 2018.
APPROVED:
William D. Tate
Mayor
ATTEST:
Tara Brooks
City Secretary
APPROVED AS TO FORM:
City Attorney
Ordinance No. 2018-056 2