HomeMy WebLinkAboutItem 18 - Water Treatment Plant LagoonMEMO TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM: BRUNO RUMBELOW, CITY MANAGER \I
MEETING DATE: FEBRUARY 17, 2015
SUBJECT: AWARD OF CONSTRUCTION CONTRACT — WATER
TREATMENT PLANT LAGOON AND MISC. IMPROVEMENTS
RECOMMENDATION
City Council consider awarding the construction contract for the Water Treatment Plant
Lagoon and miscellaneous improvements to C. Green Scaping, LP. in the amount of
$126,093.00, authorize staff to execute said contract, and take any necessary action.
FUNDING:
Funds are programmed in the Water Permanent Capital Maintenance Fund (PCMF)
Account 200-43360-534-0.
BACKGROUND:
The Grapevine Water Treatment Plant utilizes a lagoon to store water from backwashing
the filters until the backwash can be pumped to the Wastewater Plant. The bottom and
walls of the lagoon were constructed of gunite that has deteriorated over the last 25 years
(Constructed during the 1989 plant expansion). Over the last four years, gunite pieces
have broken off, causing damage to the two pumps.
Over time, the surface drainage around the lagoon has been affected by siltation. This has
caused drainage water to spill into the lagoon increasing both the volume of water pumped
to the waste water plant and the pumping costs. To avoid this, the site will be re -graded to
divert surface drainage away from the lagoon.
One bid was received and opened on January 22, 2015 from C. Green Scaping, LP in the
amount of $126,093.00.
Plans and specifications were distributed to two plan rooms and 12 contractors. The one
bid received is well within the $200,000.00 estimated by engineering staff and budgeted for
this project. City staff contacted several of the plan holders and were informed that most
choose not to bid due to the short time frame on the project and conflicts with other
projects they were committed to.
City staff has contacted references, reviewed the bid and recommends that the City award
the contract to C. Green Scaping, LP.
RAAgenda\2015\02-17-15\Lagoon Constr Award.doc
The contract schedule for the project establishes a construction time of 90 calendar days
for substantial completion. This relatively short time schedule is due to the project needing
to be complete prior to the large water demand of the summer months.
Staff recommends approval.
RAAgenda\2015\02-17-15\Lagoon Constr Award.doc
Water Treatment Plant Lagoon
Lagoon Area Feet
0 25 50 100 150 200 2/9/2015