Item 4BCITY OF
SOUTHLAK -E
MEMORANDUM
(March 1, 2011)
To: Shana Yelverton, City Manager
From: Robert H. Price, P.E., Director of Public Works
Subject: Approve Change Order No. 8 with North Texas Contracting,
Inc. in the amount of $479,539.00 for additional utility and
drainage improvements associated with the Neighborhood
Sewer Project.
Action
Requested: Approve Change Order No. 8 with North Texas Contracting, Inc. in
the amount of $479,539.00 for additional utility and drainage
improvements associated with the Neighborhood Sewer Project.
Background
Information: The Capital Improvements Program (CIP) includes funds for the
construction of sewer and paving improvements for several
neighborhoods within the City. Cheatham and Associates
completed the final design and prepared contract documents in
October of 2009. The City Council awarded the project on
November 3, 2009 to North Texas Contracting, Inc.
Approximately 9,800 linear feet of 8" and 10" sewer line has been
installed within the Heatherwood, Royal Oaks, and Twin Creeks
neighborhoods as well as along East Dove Road between
Lonesome Dove Road and Kimball Avenue. Manhole and service
line installation is currently in progress. In addition, proposed
drainage improvements along Heatherbrook Court and Creekside
Drive will begin in the next several weeks.
Also included in the project is the reconstruction of the streets
within these neighborhoods which will begin once the work
associated with the sewer line (manholes, service line, testing) as
well as the drainage work along these streets has been completed.
The reconstruction of the neighborhood streets is also anticipated
to begin in the next several weeks.
A 12" water line was also constructed from Lonesome Dove Road
to N. Kimball Avenue which complies with the City's master water
plan. During construction, a connection for the future 8" water line
along N. Kimball Ave. from E. Dove Road to the city limit line was
installed.
The construction along Primrose Lane and Pearson Road has
been completed and that portion of the project closed.
The City Manager approved Change Order No. 1 in the amount of
$6,740.00 on January 14, 2010. This change order consisted of
the relocation of a 12 -inch water line along Carroll at Primrose due
to conflicts with the storm sewer.
On February 22, 2010, the City Manager approved Change Order
No. 2 in the amount of $18,641.00. This work included the
relocation of a 12 -inch water line on Pearson Road partially located
under pavement that was in conflict with the proposed location of
the sewer line.
Change Order No. 3 in the amount of $12,630.00 was approved on
April 6, 2010 by the City Manager. The work consisted of
approximately 285 linear feet of 4 inch under drain to be installed
along the south edge of Primrose Lane to relieve the area of
excess ground water for the purpose of stabilizing the road for
paving activities.
Change Order No. 4 in the amount of $778,949.00 was approved
on May 26, 2010 by City Council and consisted of several revisions
to the design of the sanitary sewer within the Heatherwood Estates,
Royal Oaks Addition, and Twin Creeks Addition neighborhoods as
well as portions of the sewer along East Dove Road. Change
Order No. 4 also included work associated with relocating
approximately 700 linear feet of 12 inch water line from the north
right -of -way into the west bound lane of East Dove Road due to a
conflict with a 4 -inch steel gas line.
On June 3, 2010, the City Manager approved Change Order No. 5
in the amount of $2,454.00. This work included the removal and
replacement of a storm sewer culvert as well as a 24" x 18" reducer
to connect the pipe to a 24 -inch storm drain pipe.
Change Order No. 6 was approved by City Council on September
7, 2010 in the amount of $75,327.00 and included modifying the
construction sequence for the portion of Dove Road between
Sunshine Lane and N. Kimball Ave. and allowed the paving
contractor to place a 2 -inch Type "B" Asphalt binder course on the
roadway immediately after the remixing and compaction of the
subgrade. The purpose of this change was to insure the travelling
public's safety and maintenance of traffic throughout the
construction period. The placement of the 2 -inch asphalt mat
provided both a substantial driving surface as well as a working
surface on which the concrete ribbon curb was constructed. This
work has been completed.
The remaining two inches of asphalt along E. Dove Road will be
applied once the neighborhood streets have been reconstructed to
avoid damage to the top surface of the asphalt from construction
equipment still required to perform the remaining work within the
contract. Any damage to the surface layer of asphalt could
potentially result in repair that would create patches within a newly
paved road which would not be aesthetically pleasing.
On December 14, 2010, the City Manager approved Change Order
No. 7. This change order consisted of contract close out quantity
adjustments for the Primrose Lane and Pearson Road portion of
the project and resulted in a reduction of the total construction
contract price by $15,926.57.
Staff is proposing in Change Order No. 8 to add construction of
approximately 3,600 linear feet of 8" water line along N. Kimball
Ave. from E. Dove Road to the city limit line. The construction of
the 8" water line is required to be constructed by June 30, 2011 per
the interlocal agreement dated July 9, 2009 between the Cities of
Grapevine and Southlake.
Staff is also proposing to remove the remaining guard rail at
Hunter's Creek and E. Dove Road. The original design included
the removal of 5 guard rails located along E. Dove Road from
Lonesome Dove Road to N. Kimball Ave. Staff evaluated the
existing guard rail and determined that in order to remove it
modifications to the existing drainage structure were required.
In order to meet the transportation safety standards requiring a 10
foot clear zone for the design speed along E. Dove Road and at
least a 3:1 slope to allow motorists time for correction, the existing
drainage structure will be enclosed and the grade adjusted to allow
for removal of the existing guard rail. In addition to improving
safety in this area for motorists, the overall aesthetics of E. Dove
Road will be improved by removing the remaining guard rail.
Also included in Change Order No. 8 are adjustments to the
contract quantities identified during construction.
Financial
Considerations: On November 3, 2009, the City Council approved a bid amount of
$3,748,737.54. The previously approved change orders increased
the total contract amount to $4,627,561.97. Staff recommends that
City Council approve Change Order No. 8 in the amount of
$479,539.00 resulting in a total project cost of $5,107.100.97.
Strategic Link: The construction of the water, sewer, and paving improvements
links to the city's strategy map relative to the focus areas of
Infrastructure and Performance Management and Service Delivery.
The specific corporate objectives that are met by the construction
of these improvements include: Providing high quality customer
service and Investing to provide and maintain high quality public
assets.
Citizen Input/
Board Review: N/A
Legal Review: N/A
Alternatives: The City Council may approve Change Order No. 8 or deny it.
Supporting
Documents: Location Map
Change Order No. 8
Staff
Recommendation: Approve Change Order No. 8 with North Texas Contracting, Inc. in
the amount of $479,539.00 for additional utility and drainage
improvements associated with the Neighborhood Sewer Project.
Staff Contact: Robert H. Price, P.E., Public Works Director
Gordon J. Mayer, Jr., P.E., City Engineer
Michelle McCullough, P.E., Civil Engineer
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CHANGE ORDER No. 8
Dated: March 1, 2011
OWNER'S Project No. 08 -031
Project: Neighborhood Sanitary Server Water and Paving Improvements to sei-ve Heather Estate,, Ronal Oaks
Addition, Trvin Creeks Addition, Primrose Lane, Pearson Lane, and East Dove Road
OWNER City o Southlake
Contract for Server, Water, Drainage, and Paving Improvements Contract Date: November 16, 2009
To: North Texas Contracting, Inc.
Contractor
You are directed to make the changes noted below in the subject contract for the dollar amount stated below
including all labor, equipment, materials, overhead, and profit:
Nature of the changes:
The following adjustments to the current quantities of the current
contract line items
shall be made. These changes
reflect additional
work performed during the construction.
in addition, an 8" water line will be installed along the
west side of
Kimball Ave. north of Dove Road as
well as drainage improvements are planned
for the corner of Hunters
Creek and Dove
Road.
Quantity
Revised
Unit
Total
Item No.
Description
Adjustment
Quantity
Unit
Price
Price Chang
Schedule A
EXCAVATE, HAUL OFF, DISPOSE OF FAILED
6
SUBGRADE
1S
440
CY
$9.00
$135.00
10
CONSTAB" WIDE X 5" THICK 3000 PSI CONC.
1,635
9,213
LF
$8.00
$13,080.00
23
CONST. FULL DEPTH SAW CUT W/LOCATIONS
5,387
7,718
LF
$3.00
$16,161.00
24
F &I 18" DIA, CLIII C -76 RCP INCL EXCAVATION
172
749
LF
$50.00
$8,600.00
26
F &I 36" DIA CLIII C -76 RCP INCL EXCAVATION
19
301
LF
$80.00
$1,520.00
28
8" THICK 4000 PSI CONC VALLEY GUTTER
144
615
SF
$20.00
$2,880.00
31
F &I OR CONST. TXDOT SET FOR 24" DIA RCP
1
2
EA
$9DO.o0
$900.00
39
4' DIA SANITARY SEWER MANHOLE
(11
18
EA
$3,000.00
($3,000.00)
40
CONST ADDT'L DEPTH FOR 4'SSMH
(8)
29.5
VF
$190.00
($1,520.00)
45
S'DIA SANITARY SEWER MANHOLE
1
14
EA
$3,500.00
$3,500.00
46
CONST ADDT'L DEPTH FOR 5' SSMH
21
118.3
VF
$270.00
$5,670.00
49
F &I 10" DIA SDR -26 PVC 55 PIPE t12'- 14'►oC
1
24
LF
$190.00
$190.00
55
F &I 10" DfA. SDR -11 HDPE SEWER PIPE, DB
172
1,697
LF
$80.00
$13,760.00
58
BLOCK SOD
1,650
12,650
SY
$3.00
$4,950.00
79
F &I INTERIM COMP. TYPE D HMAC PVMNT REPL
52
2,672
SY
$30.00
$1,560.00
CO 4
CTS BACKFILL FOR MANHOLES
42
322
CY
$64.00
$2,688.00
C04
HAUL OFF SPOILS FOR CTS AT MANHOLES
42
322
CY
$12.00
$504.00
REMOVE EXIST RIBBON CURB
16
16
LF
$5100
$80.00
8" WATER LINE ALONG N. KIMBALL AVE
8" HDPE DR -11 BY DIRECTIONAL DRILL
3,430
3,430
LF
$74.00
$253,820.00
CNCT 8" WATER AT EAST DOVE ROAD
1
1
LS
$2,500.00
$2,500.00
77
8" GATE VALVE
7
15
EA
$1,500.00
$10,500.00
Quantity Revised Unit Total
Page 1 of 3
Item No.
Description
Adiustment
Quantit
Unit
Price
Price Change
FIRE HYDRANT W /6" GV AND 6" LEAD PIPE
7
7
EA
$6,500.00
$45,500.00
70
1" WATER SERVICE
16
45
EA
$700.00
$11,200.00
72
1" BLOW OFF @ LINE END W 18" PLUG
1
3
EA
$3,000.00
$3,000.00
TRAFFIC CONTROL PLAN
1
1
LS
$4,500.00
$4,500.00
29
18" TXDOT PRECAST SET
4
32
EA
$700.00
$2,800.00
13
HMAC PAVEMENT REPAIR
500
1,900
SY
$45.00
$22,500.00
CONCRETE DRIVE REPAIR
1
1
EA
$6,000.00
$6,000.00
CONSTRUCT BERM
225
225
LF
$10.00
$2,250.00
CLEARING & GRUBBING/ TREE RMVL
1
1
LS
$2,500.00
$2,500.00
HUNTER'S CREEK DRAINAGE IMPROVEMENTS
REMOVE EXIST CONCRETE STRUCTURE
1
1
LS
$3,200.00
$3,200.00
REMOVE EXIST METAL GUARD RAIL
75
75
LF
$7.00
$525.00
5'X 2' RCB
6
6
LF
$268.00
$1,608.00
6' X 3' RCB
25
25
LF
$291.00
$7,275.00
36" INVERTED 5£T (INFLOW STRUCTURE)
1
1
EA
$6,100.00
$6,100.00
8'X. 6' JUNCTION BOX
2
2
EA
$7,400.00
$14,800.00
CNCT TO EXIST 18" RCP
1
1
EA
$775.00
$775.00
CNCT TO EXIST 5' X 2' RCB
1
1
EA
$1,650.00
$1,650.00
BACKFILL AND FINE GRADE OVER STORM
1
1
LS
$2,200.00
$2,200.00
TV STORM LINE
59
59
LF
$2.00
$118.00
BARRICADES & TRAFFIC CONTROL
1
1
LS
$2,200.00
$2,200.00
FIBERGLASS STEPS
1
1
L5
$360.00
$360.00
Total $479,539.00
These changes result in the following adjustment of contract price and contract time:
Original Contract Price 3,748,737.54
Contract Price Including Previous Change Orders $ 4,627,561.97
Net Increase Resulting from this Change Order $ 479,539.00
Current Contract Price $ 5,107,100.97
Contract Time Prior to this Change 442 calendar days
(Days or Date)
Pagc 2 of 3
Net Increase Resulting from this Change Order 68 calendar days
(Days)
Current Contract Time Including this Change Order 510 calendar days
(Days or Date)
The above changes are recommended:
City of Southlake
City
By:
Title: Pro 'ect Mana er
Date:
City of Southlake City of Southlake
City City
By: By:
Title: City Engineer Title: Dh- ector- Public Works
Date:
The above changes are approved:
City of Southlake
City
0
Title: Mayor
Date:
2011
North Texas ContmWink, Inc.
Cootracto
By:
Date: ?--Z1 2011
Page 3 of 3