HomeMy WebLinkAbout4.03 Village Pkwy Accpt WorkSTAFF REPORT CITY CLERK
DUBLIN CITY COUNCIL File # ❑®0❑ 0❑ -3❑®
DATE: April 19, 2011
TO: Honorable Mayor and City Councilmembers
FROM: Joni Pattillo, City Manager
SUBJEC . Acceptance of Work — Contract No. 10-08, Village Parkway Stormwater Treatment
Improvements
Prepared By: Mark Lander, City Engineer
EXECUTIVE SUMMARY:
On September 21, 2010 the City Council awarded Contract No. 10-08, Village Parkway
Stormwater Treatment Improvements (CIP No. 960009), to Gradetech, Inc. The project included
installation of two structural treatment units and one vegetated treatment swale to treat storm
runoff originating from Village Parkway. The project improvements are complete and ready for
acceptance, although the maintenance of planted material will continue to be subject to a
maintenance period.
FINANCIAL IMPACT:
The total appropriations for this project are $567,800. The project budget consists of $94,723
allocated for design, inspection, and project coordination, and $473,077 for improvements. The
amount of the base contract awarded September 21, 2010 was $294,112.50 (including an
allowance for change orders and contingencies which increased the total to $323,523.75). The
final costs for the contract are within the budget. The project is funded entirely by a State grant.
Gradetech
Funding Source
Budget For
Agreement With
Actual
Improvements
10% Contingency
Stormwater Fund (#2321) — State Grant
$ 473,077.00
$323,523.75
$318,664.80
TOTAL: Improvements
Future maintenance costs are estimated at $4,000 per year. Caltrans has provided funds in the
amount of $80,000, estimated to be adequate to fund maintenance for 20 years, which has
been set aside in a reserve account for this purpose.
RECOMMENDATION:
Staff recommends that the City Council accept the improvements under Contract No. 10-08,
Village Parkway Stormwater Treatment Improvements, authorize staff to file a Notice of
Completion, and authorize the release of retention after 35 days if there are no subcontractor
claims.
Page 1 of 2 ITEM NO. -T• 3
Submitted By
Public Works Director
DESCRIPTION:
&J
Reviewed By
Administrative Services Director
Revi d By
Assistant City Manager
On June 22, 2010, the City Council approved the Five -Year Capital Improvement Program (CIP)
for Fiscal Years 2010-2015, which included the Village Parkway Stormwater Treatment Project
(CIP No. 969009). The treatment measures will remove trash, sediment, oil, and other
pollutants in storm runoff from a catchment area of 60 acres (Attachment 1), and will assist the
City in meeting requirements of the new Municipal Regional Permit for Stormwater issued by
the San Francisco Bay Regional Water Quality Control Board.
The total project budget for the 2009-2010 and 2010-2011 Fiscal Years is $567,800. Funding
was provided by Caltrans under a cooperative agreement. The total project will be completed
for less than the total grant authorization. The improvements constructed by Gradetech, Inc. in
accordance with the contract awarded September 21, 2010 are now complete. The total costs
including the maintenance period costs will be $318,664.80. This is $4,858.95 less than the
awarded contract and improvement contingency.
In addition to the project cost, Caltrans has provided a grant of $80,000 to off -set future
maintenance costs which the City has recorded in a separate stormwater management fund
#2324. Future maintenance expenditures for these improvements will also be made from this
fund.
NOTICING REQUIREMENTS/PUBLIC OUTREACH: None
ATTACHMENTS: 1. Location Map
G:1NPDESIVillage Pkwy AVB Treatment Units (Caltrans)IStaff Report Acceptance 4-19-11.doc
Page 2 of 2
ATTACHMENT -1
o00 500 2,000 ' t inch equals 150 feet
0 250 500
CITY
OF
DUBLI N
r'�<1FOP:a�
Stormwater
Treatment
Project
January
2008
Freeways
School
Parks
• Public Street
• Private Residential
— Recreational/Bike Trail
Mains < 20"
— Mains 20" to 42"
— Mains 45" - 96"
— PIPE, Size Unknown
•.. STUBS
- BOX CULVERT
- CULVERT
- CHANNEL
CATCH BASIN
INLET
• HEADWALL
Treatment Projects
LII Location I
Catchment Area
❑ Location 2
Catchment Area
Unit #1
Unit #2
Location 3
Location 4 Bioswale
in�State
�Right of Way
ATTACHP
4ENT 1