HomeMy WebLinkAboutItem 17 - Inflow and Infiltration ProjectMEMO TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM: BRUNO RUMBELOW, CITY MANAGER
MEETING DATE: NOVEMBER 20, 2018
SUBJECT: APPROVAL OF CHANGE ORDER NO. 2 — INFLOW AND
INFILTRATION PHASE 3 PROJECT AND APPROPRIATION
ORDINANCE
RECOMMENDATION: City Council to consider Change Order No. 2 to the Inflow and Infiltration
Phase 3 Project with Excel 4 Construction, LLC for sanitary sewer inflow
and infiltration improvements and an ordinance appropriating the funds.
FUNDING SOURCE: Upon approval, funds in the amount of $248,000 will be available in the
Utility Enterprise Capital Fund account 201-48940-534-009-0044SW.
BACKGROUND: On January 16, 2018, the City Council authorized $1,488,847 to Excel 4
Construction, LLC to replace aging sanitary sewer lines, associated
services, and manholes. These lines have been identified to be a source
of groundwater infiltration which puts additional demands on the City's lift
stations and treatment plant. During construction, staff has identified
additional work that needs to be performed. Change Order No. 1 was
authorized by the City Council on July 17, 2018 for $33,000. Change
Order No. 2 is for $203,266 with a 10% contingency, 2% for construction
inspection, and $20,000 in additional materials testing for a total of
$247,657.92 (rounded to $248,000).
This change order includes the following:
- $31,600 to insert new pipe within two failing corrugated metal pipes
crossing Forest Hill and Sheffield.
- $12,880 to re-route a sewer line at the southeast corner of the Marina
Del Rey apartments due to extra depths of manholes and additional boring
to reduce impacts to apartments during construction.
- $106,367 to reroute sewer behind homes southwest of the intersection of
Peninsula Drive and Placid Circle.The existing sewer was to be replaced
during the last I&I project, but was delayed due to negotiations with
property owners. This includes approximately 400 linear feet of new sewer
pipe, nearly half of which will be bored between existing homes, four new
manholes and related appurtenances.
- $37,569 to change the asphalt pavement repair from 3" surface course
to the full 6" of pavement for a longer life for all paving repair.
- $14,850 to repair sanitary sewer lines that were determined to be failing
in the field.
Staff recommends approval
ORDINANCE NO. 2018-086
AN ORDINANCE OF THE CITY COUNCIL OF THE CITY OF
GRAPEVINE, TEXAS, REVISING THE ADOPTED CAPITAL
IMPROVEMENTS BUDGET FOR THE FISCAL YEAR
ENDING IN 2019; PROVIDING FOR $248,000 IN THE
UTILITY ENTERPRISE CAPITAL FUND; DECLARING AN
EMERGENCY AND PROVIDING AN EFFECTIVE DATE
WHEREAS, the City Council of the City of Grapevine is making sanitary sewer
inflow and infiltration improvements; and
WHEREAS, funding for the changes to the inflow and infiltration improvements are
not currently included in the Fiscal Year 2018-2019 Capital Improvements Plan Budget;
and
WHEREAS, Ordinance No. 2018-002 was approved on January 16, 2018
appropriating $1,488,847 and Ordinance No. 2018-061 was approved on July 17, 2018
appropriating $33,000 in the Utility Enterprise Capital Fund; 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
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 $248,000 from
the Utility Enterprise Capital Fund for the inflow and infiltration to the City's sanitary sewer
system.
Section 3. That a copy of the revised Fiscal Year 2018-2019 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 20th day of November, 2018.
APPROVED:
William D. Tate
Mayor
ATTEST:
Tara Brooks
City Secretary
APPROVED AS TO FORM:
City Attorney
Ordinance No. 2018-086 2