Item 4CCITY OF
SOUTH LAKE
MEMORANDUM
(September 7, 2010)
To: Shana Yelverton, City Manager
From: Robert H. Price, P.E., Director of Public Works
Subject: Approve Change Order No. 2 with Quality Excavation, Ltd. for
the Quail Creek Neighborhood Sewer in the amount of
$60,977.50.
Action
Requested: Approve Change Order No. 2 with Quality Excavation, Ltd. for the
Quail Creek Neighborhood Sewer in the amount of $60,977.50.
Background
Information: In October 2009, Quality Excavation, Ltd began construction of the
Quail Creek Neighborhood Sewer improvements. Asphalt overlay
of the neighborhood streets was also included in the construction
contract.
Change Order No. 1 was approved in March 2010 by the City
Manager's office. This change order included work within the
existing drainage easement to regrade the swale between 2600
and 2601 Quail Run Court and install ConLock pavers for grade
control and was in the amount of $29,287.20. Also included in this
change order was the installation of a storm sewer pipe and
construction of a grate inlet structure.
Change Order No. 2 includes scope changes to resolve resident
concerns, additional work required because of unexpected or
hidden conditions, and reconciliation of contract quantities.
Examples of the scope changes include the replacement of an
exposed aggregate sidewalk and driveway repairs at one residence
and installation of additional block sod at several locations
throughout the project. Additional drainage pipe and ditch grading
was included to provide a mowable slope for another residence.
Several base failure locations under the existing pavement not
associated with installation of the sewer line were also identified
requiring repair prior to the asphalt overlay. The existing water line
was found to be in conflict with the sewer line in three locations and
had to be lowered.
Change Order No. 2 also includes the reconciliation of the contract
quantities. An example of the reconciliation is that pressure sewer
pipe had to be installed instead of standard sewer pipe in several
locations because of proximity to the water line to conform to TCEQ
regulations. This reduced the quantity of standard SDR -35 pipe,
but increased the quantity of C900 DR -18 pressure pipe.
The sewer line and paving activities have been completed. The
residents will be notified by letter that the sewer is available for
connection beginning September 7, 2010.
Financial
Considerations: The original contract amount awarded to Quality Excavation Ltd
was $630,891.15. Change Order No. 1 was for $29,287.20 to bring
the revised contract amount to $660,178.15. Change Order No. 2
in the amount of $60,977.50 brings the total project contract
amount to $721,155.85. The contract price is within the original
project budget of $982,264.00
Strategic Link: The construction of the sanitary sewer line and associated paving
activities link 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 this construction
project include: Providing high quality customer service and
Investing to provide and maintain high quality public assets.
Citizen Input/
Board Review: None
Legal Review: This is the Change Order form that has been previously reviewed
by the City Attorney.
Alternatives: The City Council may approve Change Order No. 2 or deny it.
Supporting
Documents: Location Map
Change Order No. 2
Staff
Recommendation: Approve Change Order No. 2 with Quality Excavation, Ltd. for the
Quail Creek Neighborhood Sewer in the amount of $60,977.50.
Staff Contact: Robert H. Price, P.E., Director of Public Works
Gordon J. Mayer, Jr., P.E. Deputy Director of Public Works
Michelle McCullough, P.E. Civil Engineer
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CHANGE ORDER No. 2
Dated: August 17, 2010
OWNER'S Project No. 09 -020
Project: Sanitary Sewerlmprovements & StreetOverlay - Quail Creek Estates
OWNER
Contract for Sewer and Paving Iniprovements Contract Date: October 6, 2009
To: Quality Excavation, Ltd.
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:
Unit IA - Quail Creek Estates Sanitary Sewer
1.
Delete 79 LF 8" Dia SDR 35 PVC SS Pipe 6' -8' depth ($40 / LF)
$(3,160.00)
2.
Delete 157 LF - 8" Dia SDR 35 PVC SS Pipe 8' -10' depth ($44 / LF)
(6,908.00)
3.
Delete 16 LF 8" Dia SDR 35 PVC SS Pipe 10' -12' depth ($49 / LF)
(784.00)
4.
Delete 32 LF 8" Dia SDR 35 PVC SS Pipe 12' -14' depth ($56 / LF)
(1,792.00)
5.
Delete 33 LF 8" Dia SDR 35 PVC SS Pipe 14' -16' depth ($61 / LF)
(2,013.00)
6.
Delete 33 LF 8" Dia SDR 35 PVC SS Pipe 16' -18' depth ($62 / LF)
(2,046.00)
7.
Delete 10 LF 8" Dia SDR 35 PVC SS Pipe 18' -29' depth ($76 / LF)
(760.00)
8.
Add 79 LF - 8" Dia C900 DR -18 Water Pipe 6' -8' depth ($45 / LF)
3,555.00
9.
Add 197 LF - 8" Dia C900 DR -18 Water Pipe 8' -10' depth ($50 / LF)
9,850.00
10.
Add 137 LF - 8" Dia 0900 DR -18 Water Pipe 10' -12' depth ($52 / LF)
7,124.00
11.
Add 32 LF - 8" Dia C900 DR -18 Water Pipe 12' -14' depth ($56 / LF)
1,792.00
12.
Add 33 LF - 8" Dia C900 DR -18 Water Pipe 14' -16' depth ($62 / LF)
2,046.00
13.
Add 33 LF - 8" Dia 0900 DR -18 Water Pipe 16' -18' depth ($65 / LF)
2,145.00
14.
Add 10 LF - 8" Dia C900 DR -18 Water Pipe 18' -20' depth ($80 / LF)
800.00
15.
Add 1 EA - 5' diameter SSMH($4,250 / EA)
4,250.00
16.
Add 8 VF - Additional depth for 5' SSMH ($3501 VF)
2,800.00
17.
Add 89 SY - 6" 3000 PSI @ 28 Days ($48 / SY)
4,272.00
18.
Add 20 SY - 6" 3000 PSI @ 28 Days ($45.80 / SY)
916.00
19.
Add 17,520 SF - Block Sod of like grass ($0.40 / SF)
7,008.00
20.
Add 3 EA - 6" water line lowering ($5,000 / EA)
15,000.00
21.
Add 60 LF - 15" / 18" CMP / HDPE Drainage pipe ($64.70 / LF)
3,882.00
22.
Delete 60 LF - Grade and Shape Ditch ($10 / LF)
(600.00)
23.
Delete 90 SF - Block Sod ($0.40 / SF)
(36.00)
24.
Add 1 - 285 SY Road Base Repair ($8,265 I L S)
8,265.00
25.
Add 1 - Remove and replace exposed aggregate sidewalk ($1,800 / LS)
1,800.00
26.
Add 1 - Remove and replace concrete drives ($701.50 / LS)
701.50
27.
Add 1 -Additional Ditch Grading ($2,900 / LS)
2,900.00
28.
Correction to Change Order No 1 total amount
(30.010
Total $60,977.50
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These changes result in the following adjustment of contract price and contract time:
Original Contract Price $ 630,891.15
Contract Price Including Previous Change Orders $ 660,178.35
Net Increase Resulting from this Change Order $ 60,977.50
Current Contract Price Including Change Order #2 S 721,155.85
The above changes are approved: City ofSouthlake
City
li
Title: Mayor ofSouthlake
Date: 2010
Page 2 of 3
Contract Time Prior to this Change 230 calendar days
(Days or Date)
Net Increase Resulting from this Change Order 0 calendar days
(Days)
Current Contract Time Including this Change Order Substantial Completion A ay 15, 2010
(Days or Date)
The above changes are recommended:
City ofSouthlake
City
li
Title: City Engineer
IN
li
City ofSouthlake
City
Title: ProiectAlanager
Date:
Cit� of Southlake
City
By:
Title: Director Public Works
Date:
Quality Excavation, Ltd.
Contractor
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