Item 4DCITY OF
SOUTH LADE
MEMORANDUM
(June 1, 2010)
To: Shana Yelverton, City Manager
From: Robert H. Price, P.E., Director of Public Works
Subject: Approve Change Order No. 4 for the Neighborhood
Improvement Project of Heatherwood Estates, Royal Oaks
Addition, and Twin Creeks Addition for additional sanitary
sewer improvements with North Texas Contracting, Inc. in the
amount of $778,949.00
Action
Requested: Approve Change Order No. 4 for the Neighborhood Improvement
Project of Heatherwood Estates, Royal Oaks Addition, and Twin
Creeks Addition for additional sanitary sewer improvements with
North Texas Contracting, Inc. in the amount of $778,949.00
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 will be
constructed within the Heatherwood, Royal Oaks, and Twin Creeks
neighborhoods as well as along East Dove Road between
Lonesome Dove Road and Kimball Avenue. Once completed, the
sewer line will serve approximately 70 residential and commercial
properties.
Also included in the project is the reconstruction of the streets
within these neighborhoods and East Dove Road between
Lonesome Dove and Kimball Avenue. To comply with the City's
master water plan, a 12" water line will also be constructed along
East Dove Road from Lonesome Dove and Kimball Avenue to
replace the existing substandard 8" water line.
The construction along Primrose Lane included the construction of
a sewer line, replacing the existing water line, minor drainage
improvements, and widening and reconstruction of the road. Sewer
was also installed along Pearson Lane from Johnson Road to Gray
Lane.
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 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 activites.
The current change order in the amount of $778,949.00 consists 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. Currently, the proposed location of the sewer line
along these streets is approximately 5 feet back of curb on the west
side of each street. Although the sewer will still be directionally
bored, there is significant potential for sags or "bellies" to be
created during installation of the sewer line.
The City requires the contractor to repair the "bellies" before the
line is accepted. These are well established neighborhoods with
many large trees located on each lot. In addition, several of these
properties have retaining walls and heavily landscaped areas
located in the proposed alignment of the sewer line. Should a
"belly" exist and require repair, the disruption to the residents'
property can be minimized by placing the sewer line under the
pavement. Moving the proposed sewer into the roadway where
possible will minimize the impact to the property should a "belly"
occur and require repair.
The change order also reroutes the sewer line in Dove Road from
Creekside Lane to connect to the sewer in Royal Oaks. This will
partially relieve the load on the lift station previously proposed on
Creekside and provide sewer service to the Dove Road locations in
a shorter time frame. City Staff is currently evaluating the feasibility
of relocating the lift station to Torian Lane.
This change order also includes 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. Waiting for Atmos Energy to
relocate this 4-inch steel gas line would prove very lengthy and
potentially extremely costly for the city.
A significant portion of the cost of this change order is related to the
requirement for placing Cement Treated Stabilization (CTS) over
underground utility lines when open cutting existing pavement to
ensure a stabilized base material for the flexible pavement surface.
Although the sewer line is to be directionally bored, the contractor
has significant risk of open cutting the pavement to make repairs of
the sag locations. In addition, approximately 2,000 square yards of
sod were needed to establish permanent erosion control along
Primrose Lane to be in compliance with the City's erosion control
ordinance.
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 $3,786,748.54. Staff recommends that
City Council approve Change Order No. 4 in the amount of
$778,949.00 resulting in a total project cost of $4,565,697.54.
Staff recommends funding Change Order No. 4 from the
unencumbered funds in the following existing CIP accounts
budgeted for this project:
503699-598804-S0009 $ 250,000
502699-598804-U0025 $ 686,000
209499-598804-R0038 $ 178, 000
Total Available Budget $ 1,114,000
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. 4 or deny it.
Supporting
Documents: Location Map
Change Order No. 4
Staff
Recommendation: Approve Change Order No. 4 for the Neighborhood Improvement
Project of Heatherwood Estates, Royal Oaks Addition, and Twin
Creeks Addition for additional sanitary sewer improvements with
North Texas Contracting, Inc. in the amount of $778,949.00
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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kk4
North Texas Contracting, Inc.
Job Name: NEIGHBORHOOD SS, WTR, STORM 5/24/2010
Location: SOUTHLAKE, TEXAS 8:05 AM
Bid Date: 20-Oct-09
Bid Time: 10:00:00 AM
Revised 10102
Item
No.
Description
Q
Unit
Bid
Unit
Bid
Amount
SEWER ADJUSTMENTS
PER UPDATED DRAWINGS FURNISHED ON 5.3.10
0.00
0.00
0.00
0.00
38
4" SDR-35 PVC
59
LF
3.00
177.00
39
4' DIA SANITARY SEWER MANHOLE
-1
EA
3,000,00
-3,000.00
40
ADDT'L DEPTH FOR 4' SS MH
29.5
VF
190.00
5,605.00
45
5' DIA SANITARY SEWER MANHOLE
1
EA
3,500.00
3.500.00
46
ADDT'L DEPTH FOR 5' SS MH
12
VF
270.00
3,240.00
47
U DIA SANITARY SEWER DROP MANHOLE
-2
EA
4,500.00
-9,000.00
48
ADDT'L DEPTH FOR DROP MANHOLE
-15:5
VF
270,00
-4,185,00
53
8" SDR-11 HDPE BY DIRECTIONAL BORE
-2903
LF
65.00
-188,695.00
8" SDR-11 HDPE BY DIRECTIONAL BORE UNDER PAVING
1885
LF
113.00
213,005.00
8" SDR-26 PVC OPEN CUT @ 23' DEEP MAX @ HEATHER LN
343
LF
414.00
142,002.00
8" SDR-26 PVC OPEN CUT AT ROYAL OAKS CT AVG 10' DEEP
202
LF
163.00
32,926.00
8" SDR-26 PVC OPEN CUT AT "BORE PITS" AVG 13' DEEP
473
LF
260.00
122,980.00
55
10" SDR-11 HDPE BY DIRECTIONAL BORE
-379
LF
80.00
-30.320.00
10" SDR-11 HDPE BY DIRECTIONAL BORE > 20' DEEP
98
LF
125.00
12,250.00
10" SDR-11 HDPE BY DIRECTIONAL BORE UNDER PAVING
67
LF
124.00
8,308.00
10" SDR-26 PVC (12'-14') OPEN CUT UNDER PAVING
141
LF
266.00
37,506.00
10" SDR-26 PVC (16'-18') OPEN CUT UNDER PAVING
73
LF
289.00
21,097.00
79
2" INTERIM TY D HMAC
1146
SY
30.00
34,380.00
80
TRENCH SAFETY PLAN
1232
LF
1.00
1,232.00
81
TRAFFIC CONTROL PLAN
1
LS
2,500.00
2,500.00
8" SDR-26 PVC BY BORE
103
LF
70.00
7,210.00
CTS BACKFILL FOR MANHOLES MOVED TO STREET
210
CY
64.00
13,440.00
HAUL OFF SPOILS FOR CTS AROUND MANHOLES
210
CY
12.00
2,520.00
0.00
0.00
0,00
0.00
TOTAL CHANGE AMOUNT FOR SEWER ADJUSTMENTS $
428,678.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
North Texas Contracting, Inc.
Job Name: NEIGHBORHOOD SS, WTR, STORM 5/24/2010
Location: SOUTHLAKE, TEXAS 8:05 AM
Bid Date: 20-Oct-09
Bid Time: 10:00:00 AM
.�1�:iir7llya
Item
No.
Description
Qty
Unit
Bid
Unit
Bid
Amount
SEWER ADJUSTMENTS ALONG CREEKSIDE
0.00
0.00
0.00
0.00
39
4' DIA SANITARY SEWER MANHOLE
1
EA
3,000.00
3,000.00
40
ADDT'L DEPTH FOR 4' SS MH
8
VF
190.00
1,520.00
44
ADDT'L DEPTH FOR SPEC MANHOLE
2.5
VF
270.00
675.00
45
5' DIA SANITARY SEWER MANHOLE
1
EA
3,500.00
3,500.00
46
ADDT'L DEPTH FOR 5' SS MH
9
VF
270.00
2,430.00
48
ADDT'L DEPTH FOR DROP MANHOLE
3
VF
270.00
810.00
52
4" SDR-11 HDPE BY DIRECTIONAL BORE
-1314
LF
35.00
-45,990.00
4" SDR-11 HDPE BY DIRECTIONAL BORE UNDER PAVING
1025
LF
62.00
63,550.00
4" FORCE MAIN BY OPEN CUT - UNDER PAVING
300
LF
63.00
18,900.00
53
8" SDR-11 HDPE BY DIRECTIONAL BORE
-2380
LF
65.00
-154,700.00
8" SDR-11 HDPE BY DIRECTIONAL BORE UNDER PAVING
1870
LF
113.00
211,310.00
8" SDR-26 PVC OPEN CUT AT "BORE PITS" AVG 13' DEEP
555
LF
260.00
144,300.00
79
2" INTERIM TY D HMAC
700
SY
30,00
21,000,00
80
TRENCH SAFETY PLAN
855
LF
1.00
855.00
81
TRAFFIC CONTROL PLAN
1
LS
2,500.00
2,500.00
CTS BACKFILL FOR MANHOLES MOVED TO STREET
280
CY
64,00
17,920.00
HAUL OFF SPOILS FOR CTS AROUND MANHOLES
280
CY
12.00
3,360.00
0.00
0.00
SEWER ALONG CREEKSIDE TOTAL CHANGE AMOUNT
$ 294,940.00
0.00
0.00
0.00
0.00
12" WATER
LINE VEERING INTO DOVE RD
0.00
0.00
0.00
0.00
CTS BACKFILL IN STREET
642
CY
64.00
41,088.00
CNCTTO EXIST 12" WTR LINE (SOLID SLEEVE, ETC.)
1
EA
1,463.00
1,463.00
0.00
0.00
12" WATER LINE INTO DOVE RD TOTAL CHANGE AMT
$ 42,551.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0,00
0.00
D.00
0.00
0.00
0.00
0.00
0.00
North Texas Contracting, Inc.
Job Name: NEIGHBORHOOD SS, WTR, STORM 5/2412010
Location: SOUTHLAKE, TEXAS 8:07 AM
Bid Date: 20-Oct-09
Bid Time: 10:00:00 AM
Revised 10102
Item
No.
RMV FIRE HYDRANT & RE-INST,
EAST OF EXISTING LOCATION
Description
LOCATION
U
REMOVE EXIST FIRE HYDRANT & GATE VALVE 1 EA
PLUG EXIST 12" X 6" TEE 1 EA
58 BLOCK SOD OF LIKE GRASS 10 SY
CUT IN 12" X 6" TEE (INCL. 12" SOLID SLEEVE) 1 EA
INSTALL FIRE HYDRANT ASSEMBLY 1 EA
6" GATE VALVE 1 EA
TOTAL IF INSTALLED EAST OF CURRENT LOCATION $ 6,780.00
MISCELANEOUS ITEMS ON PRIMROSE
BLOCK SOD OF LIKE GRASS 2000 SY
MISC ITEMS SUBTOTAL FOR PRIMROSE
$
6,000.00
MAIN SEWER ADJUSTMENTS SUBTOTAL
$
428,678.00
CREEKSIDE SEWER ADJUSTMENTS SUBTOTAL
$
294,940.00
WATERLINE INTO DOVE SUBTOTAL
$
42,551.00
MOVING OF FIRE HYDRANT SUBTOTAL
$
6,780.00
MISC PRIMROSE ITEM SUBTOTAL
$
6,000.00
TOTAL CHANGE ORDER AMOUNT
$
778,949.00
NOTE: FOR ALL PIPE UNDER PAVING - 2 EA - 2' LAYERS OF CTS ONLY
Bid
Unit
Bid
Amount
0.00
0.00
0.00
0.00
0.00
0.00
1,350.00
1,350.00
750.00
750.00
3.00
30.00
3,000.00
3,000.00
1,250.00
1,250.00
400.00
400.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
3.00
6,000.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0,00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0,00
0.00
0.00
0.00
0,00
0.00
0.00
0,00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00