Item 8BAGENDA ITEM # 8B
JUNE 28, 2010
CITY OF ATLANTIC BEACH
CITY COMMISSION MEETING
STAFF REPORT
AGENDA ITEM: Proposed Change Order No. 8 to Royal Palms Drainage Rehabilitation
Project (PW0905)
SUBMITTED BY: Rick Carper, P.E., Public Works Director ~ ~,
DATE: June 21, 2010
BACKGROUND: At the July 27~', 2009 meeting, the Commission approved the award of a
contract to R.B. Baker Construction, Inc. for construction of the Royal Palms Drainage
Rehabilitation Project (PW0905) in the amount of $3,197,823.46 for the base bid and
selected additive alternates and a contingency of 10% of the base bid.
Change Order No. 8 includes several design changes to account for existing field conditions,
such as substituting elliptical pipe for round to get more coverage over the new pipes, with
the bulk of the change order required to add additional quantities of temporary pavement
repair and concrete curb and gutter and driveway replacement. Quantities have increased
because of changes to the design to avoid existing utilities. Some changes moved new
storm sewer piping further into the roads requiring removal of more existing pavement and
curb and gutter than was in the original bid document. Changes include a modification to
move new storm sewer piping along the south side of Plaza Drive from under the sidewalk at
the edge of the right of way into the roadway to avoid removal of a number of mature oak
and other hardwood trees. Additionally, for uniformity, the city has authorized replacement of
a number of driveways from the curb to the right of way line, rather than the smaller saw cut
segment near the road called for in the plans.
The project contingency amount at inception was $257,067; current contingency balance is
$184,944. Change order 8 is for $136,598.61. Because this change order will significantly
deplete the contingency balance for the Royal Palms project with actual construction at the
50% point, Staff recommends withdrawing approval to construct Additive Alternate K, Wahoo
Drive Storm Sewer replacement, and adding the $30,003.62 price of Alt. K to the project
contingency.
Because of the design change on Plaza Drive, the maintenance of traffic (MOT) plan to support
this piping installation will require closing one lane of traffic on Plaza Drive and detouring
traffic around construction. The proposed plan is to divert most traffic to Atlantic Blvd at
Sailfish Drive and Mayport Road and for local traffic to use Sailfish Drive North. Storm sewer
construction on Plaza Drive is scheduled to begin in July and be completed in August.
RECOMMENDATION: Authorize the City Manager to execute Change Order No. 8 to the R.B.
Baker Construction contract.
BUDGET: This project is funded from the Stormwater Fund, Account No.
470-0000-538-6300. The total contract price with this change order will remain
$3,197,823.46, including contingency.
ATTACHMENT: (1) Proposed Change Order No. 8
REVIEWED BY CITY MANAGER:
AGENDA ITEM # 8B
JUNE 28, 2010
CHANGE ORDER NO. B
Contractor: RB. Baker Construction, Inc. Owner: City of Atlantic Beach
Parkway
32095 Date: April 15, 2010
Attention: Chuck Chaon City Bid No.: 0809-08
Project: Royal Palms Drainage Rehabilitation Project
You are hereby requested to comply with the following changes in the Contract Documents:
1. Revised Scope of Work
DECREASE
IN INCREASE IN
UNIT CONTRACT CONTRACT
ITEM NO. DESCRIPTION QTY UNIT PRICE $ PRICE $ PRICE $
1 Concrete Driveway 5" 400 SY $32.76 $13,104.00
ase epalr ,
Miami Curb an
3 Gutter 2,000 LF $14.61 $29,220.00
Co Patch Asph t
4 Credit -3,921 SY $6.90 -$27,054.90
ew ur et
ew et x
ew o e ~ ,
uct -
- .
uct -
- ,
uct $1,855.20
Ditch Pavement -17 SY $48.04 -
36" Endwall -1 EA $2,509.04 -
36" RCP -58 LF $68.85 -
Connect to Existing -1 EA $1,392.07 -
-$38,324.8 $174,923,50
NET CHANGE IN CONTRACT PRICE $136,598.61
The above Revised Scope of Work will be added to the existing Purchase Order for the project. 10
days will be added to the Contract Completion Date. Revised Project Completion Date is October
3rd, 2010.
Accepted
BY~ Date:
Contractor
Approved
BY~ Date:
Owner