SS9901-AG030610* HE - ° I * . - ° P DEPT: Engineering /Public Works
AGENDA REQUEST FORM COPPELL DATE: June 10 2003
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* ^ a ITEM #: 9/B
ITEM CAPTION:
Consider approval of amending the contract with Turner Collie and Braden, Inc. for the design of Deforest Road
and Sandy Lake Road Lift Stations and Force Main Improvements in an amount of $70,365 as provided for in
water /sewer CIP funds; and authorizing the City Manager to sign.
CITY COUNCIL
GOAL(S): ' IL
EXECUTIVE SUMMARY:
010
Motion to Approve
M - York
S - Peters
Vote - 6 -0
Tunnel] absent
a�
This agreement will allow the redesign of the force main to provide an alternate bid to tunnel/bore the majority of
MacArthur Blvd. from Deforest Rd. to Sandy Lake Rd. This should preserve the majority of the existing trees and
landscaping within the median from Deforest Rd. to Sandy Lake Rd. This revision could also result in a less
expensive construction cost when compared with open cutting the median and replacing all irrigation, landscaping
and trees.
Staff recommends approval of this amendment to the contract and will be available to answer any questions at the
Council meeting.
FINANCIAL COMMENTS: Funds have been allocated in the water /sewer self funded CIP accounts.
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Agenda Request Form - Revised 09/02 Document Name: #LiftStationl -AR
TurnerCollieOBraden Inc.
Engineers • Planners • Project Managers
June 3, 2003
17300 Dallas Parkway
Suite 1010
Dallas, Texas 75248
Tel (9721735 -3000
Fax: (972) 735 -3001
TCB Job No. 052131124.0001.00020.Al23
Deforest & Sandy Lake LS Improvements
Mr. Kenneth M. Griffin, P.E.
Director of Engineering & Public Works
City of Coppell
255 Parkway Boulevard
P.O. Box 478
Coppell, Texas 75019 -4409
RE: DeForest and Sandy Lake Wastewater Lift Stations and Force Main Improvements
Supplemental Agreement No. 2
Dear Mr. Griffin:
After execution of this Supplemental Agreement No. 2, the Engineering Services Contract
between the City of Coppell and Turner Collie & Braden Inc. for the DeForest and Sandy Lake
Wastewater Lift Stations and Force Main Improvements will be modified as follows:
The Engineering Services Contract is revised to increase the compensation from
$415,289 to 5485,654, an increase of $70,365. This increase in compensation is
requested due to additions to the Scope of Services as described in Exhibit A and Exhibit
B attached hereto. Compensation for these services will be in accordance with the
original Engineering Services Contract dated March 7, 2001, Section 3A - Compensation.
All other terms and conditions of the Engineering Services Contract dated March 7, 2001 are
unchanged and remain in full force and effect.
Turner Collie & Braden Inc.
City of Coppell
By; By:
obert C. Reac , E.
Senior Vice resident
Date: J" 3� 2.o03
F�Idblished in 1946
Engineering Excellence for Over One -Half Century
4' A 1 ( M Q"mrnw
MEMORANDUM
FROM THE
DEPARTMENT OF ENGINEERING
To: Mayor and City Council
From: Kenneth M. Griffin, P.E., Director of Engineering/Public Works
Date: June 10, 2003
RE: Consider approval of amending the contract with Turner, Collie and Braden,
Inc. for the design of Deforest Road and Sandy Lake Road Lift Stations and
Force Main Improvements in an amount of $70,365 as provided for in
water /sewer CIP funds; and authorizing the City Manager to sign.
In June 2000, the City of Coppell entered into a design contract with Turner, Collie and Braden
in the amount of $405,863 for the design of a new lift station at Deforest Road, a modification of
the existing lift station on Sandy Lake Road, the design of a new force main along MacArthur
Blvd. from the Deforest Rd. Lift Station to the Sandy Lake Rd. Lift Station, and the design of an
additional force main from the Sandy Lake Rd. Lift Station south to Belt Line Road. During the
design phase, the City of Coppell tried to be sensitive to the existing trees and landscaping within
the median of MacArthur Blvd. from Deforest Rd. to Sandy Lake Rd. However, the only
corridor available to install a force main is within the existing median. A force main does not
have to be a gravity flow system, so therefore it can be installed shallower than a normal gravity
sewer system. With the existing utilities in MacArthur Blvd., both along the roadway and
crossing the roadway, the design is such that there are numerous bends within the proposed force
main to go either over or under existing utilities. Also, in an attempt to save numerous trees
along the area, we have instructed the design consultant to specify boring in numerous locations
along MacArthur Blvd. We have also included numerous bends in the design to go around
existing trees and improvements.
The design of the original project is nearing completion. In discussions with the consultant, it
has been noted several times that we are concerned with the design of the force main because of
its impact on existing improvements and if there are there any other options available. The
consultant has researched various options and is recommending that the City explore the
possibility of using directional drilling on this project. Directional drilling is a technique that you
see throughout the City of Coppell utilized by the various utility companies to install their
conduit. It is a technique that has evolved expeditio i n the last few years so that there is
greater control over the drilling both in depth and in location.
We have visited with a contractor and reviewed the equipment and the operation and we have
visited with a vendor to review the type of material that would be utilized in a directional- boring
concept. Using directional boring on this project allows us the opportunity to bore beneath long
sections of MacArthur Blvd. without disturbing the surface area. The line would be
approximately 20 -25 feet deep. The pipe material is a polyethylene and should not need
maintenance, therefore, the depth is not a concern.
"CITY OF COPPELL ENGINEERING - EXCELLENCE BY DESIGN"
The concept of directional boring intrigues me and quite possibly gives the City the opportunity
to construct this project without the removal of large amounts of trees, landscaping and
irrigation. To utilize the concept of directional boring, the construction plans need to be revised.
The original concept is nearing completion, therefore, to change the construction concept prior to
the bidding of the project requires a redesign of the project. Approximately 40 sheets of the
construction plans need to be revised to show the concept of directional boring as opposed to
open cut.
If this amendment to the contract is approved, then we have instructed Turner, Collie and
Braden, Inc. to retain the original design, create an alternate design with the directional boring
and then bid both designs. This will give us the opportunity to compare cost differentials
between the two concepts. The consultant has estimated that the directional boring construction
could potentially be several hundred thousand dollars less expensive than the open cut concept.
The majority of this estimated cost savings is associated with labor, and replacement of existing
trees, irrigation, landscaping, etc. The actual material utilized in the directional boring is higher
priced on a per /foot basis as opposed to the material that would be utilized in an open cut
method.
Bidding both concepts will give a true representation of the cost differential. Even if the
directional boring does bid slightly higher than the open cut, I would probably still recommend
that directional boring concept because of the opportunity to preserve the existing irrigation, trees
and landscaping along the median of MacArthur Blvd.
Staff recommends approval of the amendment to the contract with the consultant in the amount
of $70,365 . Staff will be available to answer any questions at the Council meeting.
"CITY OF COPPELL ENGINEERING - EXCELLENCE BY DESIGN"
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DEFOREST ROAD
LIFT STATION IMPROVEMENTS
FORCE MAIN LINE D
CONSTRUCTION COST ESTIMATE
Option 1 - DI Pipe by Open Cut wNertical Pipe Loop (bore under trees)
Item No.
Description
Unit
Quantity
Unit Price
Total
1
30" DI Force Main by open cut (cement - lined, poly - wrapped, restrained)
LF
5879
$125
$734,875
2
30" DI Force Main by bore with 48" steel encasement
LF
2856
$550
$1,570,800
3
Ductile Iron Fittings
TN
32.86
$3,000
$262,840
4
Vertical pipe loop (30" DI pipe, 20 ft tall w /concrete base)
LS
1
$15,000
$15,000
5
4" Combination A/V Valve
EA
11
$3,000
$33,000
6
Precast MH (5' diameter, approx. 5 -10 ft deep)
EA
10
$5 jw
$58,000
7
Sod (assume 10' trench width)
SY
4936
$4.00
$19,744
8
Replace /relocate irrigation lines, other underground utilities
LS
1
$25,000.00
$25,000
9
Traffic Control
LS
1
5`5,000
$5,000
10
Storm Water Pollution Prevention
LS
1
$11,500
$11,500
Sub -Total
$2,735,759
10%
Contingency
$273,576
Estimated Construction Duration: 300 calendar days
Total
$3,009,335
City of Coppell Coppel Line D- Construction Estimate 04 -25 -03
Line D April 25, 2003
DEFOREST ROAD
LIFT STATION IMPROVEMENTS
FORCE MAIN LINE D
CONSTRUCTION COST ESTIMATE
Option 5 - HPDE Pipe (Directional Drilling)
Item No.
Description
Unit
Quantity
Unit Price
Total
1
30" HDPE Force Main by directional drilling
Material (30" DIPS DR 17)
LF
7752
$465,120
Installation
LF
7752
$150
$1,162,800
2
Excavation /backfill of access pits
EA
12
$15,000
$180,000
3
30" HDPE Force Main by open cut (SDR 21)
LF
914
$160
$146,240
4
HDPE Fittings
30" 45 deg Elbow
EA
4
53,900
$15,600
30" x 18" Branch Saddle
EA
5
$4,500
$22,500
30" Flange Adapter w/ Back -up Ring
EA
2
S3,200
$6,400
18" Flange Adapter w/ Back -up Ring
EA
5
52,700
$13,500
5
Hydrostatic testing of HDPE piping
LS
1
$15,000
$15,000
6
4" Combination A/V Valve
EA
5
$3,000
$15,000
7
Precast MH (6' diameter, approx. 10 ft deep)
EA
5
$7,000
$35,000
8
Sod
SY
1680
$4
$6,720
9
Traffic Control
LS
1
$5,000
$5,000
10
Storm Water Pollution Prevention ($2500 for plan, $1.50 /LF silt fence)
LS
1
$10,000
$10,000
Sub -Total
$2,098,880
10% Contingency
$209,888
Estimated Construction Duration: 150 calendar days
Total
$2,308,768
City of Coppell Coppel Line D- Construction Estimate 04 -25 -03
Line D April 25, 2003
EXHIBIT A
SUPPLEMENTAL AGREEMENT NO.2
SCOPE OF SERVICES
DEFOREST AND SANDY LAKE LIFT STATIONS AND FORE MAIN IMPROVEMENTS
0.0 GENERAL
0.1. Project Description
The additional services to be provided for this project consist of the re- design of the 20"
force Main Line "A" and "B" and the 30" Force Main Line "D" to allow for the use of
polyethylene pipe and directional drilling to help minimize the disruption to the median
along Macarthur Boulevard.
The new design of the proposed force mains will be advertised as an alternate bid to the
original design using ductile iron pipe.
2.0 FINAL DESIGN
• Add general notes related to the installation of PE pipe and the installation method of
directional drilling.
• Update quantity sheets for the new alignments.
• Update the project layout sheets to show the design changes.
• Modify horizontal and vertical alignment on the plan and profile sheets for the
installation of PE pipe using directional drilling.
• Provide details required for PE pipe and directional drilling.
• Provide specifications required for PE pipe and directional drilling.
• Provide new bid tabulation
• Prepare bid documents for bid of original design and alternate bid of PE pipe.
4.1 SURVEYING
• Provide meets and bounds for one (1) Easement
4.2 GEOTECHNICAL SERVICES
• Provide fifteen (15) — thirty (30) feet deep bores along proposed force main
alignments. Approximately one(1) bore every 1000 feet.
EXHIBIT B
City of Coppell, Texas 05/22/03
DeForest and Sandy Lake Wastewater
Lift Stations and Force Main Improvements
SUPPLEMENTAL AGREEMENT NUMBER 2
oraaw ooR V woo
TASK LISTING
Pr
ana e
Magce r
En Prgi e ne e r
ie
staff
En weer
Senior Technician
Technician
�
Clerical
TOTAL
$ 224
Reproduction (Reports)
Deliveries
15 - 30; Bores on Alignment
$50
Postage
$50
Mileage
1 Easement
750
Computer Use
218 hours CADD $10 /hr
$2,180
Line A & B
15.00%
$544
NON -LABOR TOTAL 11
11
$4, 168
General Notes
2
1
1
$245
Quantities
8
12,550
1
0
$815
Project Layout (2)
2
4
$410
Line A - Plan & Profiles (11) 1
22
66
1
66
$12,760
Line B - Plan & Profiles (2)
2
6
6
$1160
Details (1)
2
4
$410
Line D
7
$665
Quantities
16
2
$1,630
Project Layout (4)
Line D - Plan & Profiles (20)
40
4
120
6
120
$710
$23,200
Specifications
Bid Tabulaiton
4
2
20
12
8
4
$2,860
$1,620
Alternate Bid
8
40
8
$5,280
TOTAL HOURS
78
305
1
1
218
12
613
LABOR EXPENSE TOTALS
$10,140
1 $28,975
1
1
$11,990
$660
$51,765
r�
1 �.ao rvvn -�novn �
Task
$1,120
Plotting
40 sheets x $7 /sheet x 4 submittals
Subcontract
I Expense
Reproduction (Plans)
40 sheets x 8 sets x $0.701sheet
$ 224
Reproduction (Reports)
Deliveries
15 - 30; Bores on Alignment
$50
Postage
$50
Mileage
1 Easement
750
Computer Use
218 hours CADD $10 /hr
$2,180
Administrative
15.00%
$544
NON -LABOR TOTAL 11
11
$4, 168
JU�V V IY 1 RNV 1 VM1 JLM1 V r✓�✓ r+�✓ n ✓,�,rr�•
Subcontractor
Task
Lab
& Ex p.
Admin.
15.110%4
s
contracts
Subcontract
I Expense
Terra -Mar
15 - 30; Bores on Alignment
11,800
1,770
Survcon
1 Easement
750
113
:� 863
TOTALS
12,550
1,883
0
$14.433
TOTAL ESTIMATE $70,365
DEFOREST ROAD
LIFT STATION IMPROVEMENTS
FORCE MAIN LINE D
CONSTRUCTION COST ESTIMATE
Option 1 - DI Pipe by Open Cut wNertical Pipe Loop (bore under trees)
Item No.
Description
Unit
Quantity
Unit Price
Total
1
30" DI Force Main by open cut (cement - lined, poly- wrapped, restrained)
LF
5879
$125
$734,875
2
30" DI Force Main by bore with 48" steel encasement
LF
2856
$550
$1,570,800
3
Ductile Iron Fittings
TN
32.86
58,000
$262,840
4
Vertical pipe loop (30" DI pipe, 20 ft tall w /concrete base)
LS
1
$15,000
$15,000
5
4" Combination AN Valve
EA
11
53,000
$33,000
6
Precast MH (5' diameter, approx. 5 -10 ft deep)
EA
10
S5,800
$58,000
7
Sod (assume 10' trench width)
SY
4936
$4.00
$19,744
8
Replace /relocate irrigation lines, other underground utilities
LS
1
$25,000.00
$25,000
9
Traffic Control
LS
1
$5,000
$5,000
10
Storm Water Pollution Prevention
LS
1
$11,500
$11,500
Sub -Total
$2,735,759
10%
Contingency
$273,576
Estimated Construction Duration: 300 calendar days
Total
$3,009,335
City of Coppell Coppel Line D- Construction Estimate 04 -25 -03
Line D Page 1 of 5 April 25, 2003
DEFOREST ROAD
LIFT STATION IMPROVEMENTS
FORCE MAIN LINE D
CONSTRUCTION COST ESTIMATE
Option 2 - DI Pipe by Open Cut w/Vertical Pipe Loop (replace trees)
Item No.
Description
Unit
Quantity
Unit Price
Total
1
30" DI Force Main by open cut (cement - lined, poly- wrapped, restrained)
LF
6629
$125
$828,625
2
30" DI Force Main by bore with 48" steel encasement
LF
2106
$550
$1,158,300
3
Ductile Iron Fittings
TN
32.86
58,000
$262,840
4
Vertical pipe loop (30" DI pipe, 20 ft tall w /concrete base)
LS
1
$15,000
$15,000
5
4" Combination A/V Valve
EA
11
53,000
$33,000
6
Precast MH (5' diameter, approx. 5 -10 ft deep)
EA
10
55,800
$58,000
7
Replace trees
EA
25
$750
$18,750
8
Replace /relocate irrigation lines, other underground utilities
LS
1
$25,000.00
$25,000
9
Sod (assume 10' trench width)
SY
5770
$4.00
$23,080
10
Traffic Control
LS
1
55,000
$5,000
11
Storm Water Pollution Prevention
LS
1
$12,500
$12,500
Sub -Total
$2,440,095
10%
Contingency
$244,010
Estimated Construction Duration: 300 calendar days
Total
$2,684,105
City of Coppell Coppel Line D- Construction Estimate 04 -25 -03
Line D Page 2 of 5 April 25, 2003
DEFOREST ROAD
LIFT STATION IMPROVEMENTS
FORCE MAIN LINE D
CONSTRUCTION COST ESTIMATE
Option 3 - HPDE Pipe by Open Cut (bore under trees)
Item No.
Description
Unit
Quantity
Unit Price
Total
1
30" HDPE Force Main by open cut (SDR 21)
LF
5879
5160
$940,640
2
30" HDPE Force Main by bore (no encasement)
LF
2856
5500
$1,428,000
3
HDPE Fittings
30" 45 deg Elbow
EA
11
53,900
$42,900
30" 30 deg Elbow
EA
2
53,400
$6,800
30" 22.5 deg Elbow
EA
8
53,300
$26,400
30 "11.25 deg Elbow
EA
13
;,3,000
$39,000
30" x 18" Branch Saddle
EA
11
;;4,500
$49,500
30" Flange Adapter w/ Back -up Ring
EA
2
;,3,200
$6,400
18" Flange Adapter w/ Back -up Ring
EA
11
$2,700
$29,700
4
4" Combination A/V Valve
EA
11
$3,000
$33,000
5
Precast MH (5' diameter, approx. 5 -10 ft deep)
EA
10
55,800
$58,000
6
Replace /relocate irrigation lines, other underground utilities
LS
1
$25,000.00
$25,000
7
Sod (assume 10' trench width)
SY
4936
$4.00
$19,744
8
Traffic Control
LS
1
S5,000
$5,000
9
Storm Water Pollution Prevention ($2500 for plan, $1.50 /LF silt fence)
LS
1
$1 1,500
$11,500
Estimated Construction Durations 300 calendar days
City of Coppell
Line D Page 3 of 5
Sub -Total $2,721,584
10% Contingency $272,158
Total $2,993,742
Coppel Line D- Construction Estimate 04 -25 -03
April 25, 2003
DEFOREST ROAD
LIFT STATION IMPROVEMENTS
FORCE MAIN LINE D
CONSTRUCTION COST ESTIMATE
Option 4 - HPDE Pipe by Open Cut (replace trees)
Item No.
Description
Unit
Quantity
Unit Price
Total
1
30" HDPE Force Main by open cut (SDR 21)
LF
6629
$160
$1,060,640
2
30" HDPE Force Main by bore (no encasement)
LF
2106
$500
$1,053,000
3
HDPE Fittings
30" 45 deg Elbow
EA
11
53,900
$42,900
30" 30 deg Elbow
EA
2
53,400
$6,800
30" 22.5 deg Elbow
EA
8
53,:',00
$26,400
30 "11.25 deg Elbow
EA
13
S3,00o
$39,000
30" x 18" Branch Saddle
EA
11
54,500
$49,500
30" Flange Adapter w/ Back -up Ring
EA
2
53,200
$6,400
18" Flange Adapter w/ Back -up Ring
EA
11
$2,700
$29,700
4
4" Combination A/V Valve
EA
11
:,3,000
$33,000
5
Precast MH (5' diameter, approx. 5 -10 ft deep)
EA
10
55,800
$58,000
6
Replace Trees
EA
25
5750
$18,750
7
Replace /relocate irrigation lines, other underground utilities
LS
1
$25,000.00
$25,000
8
Sod
SY
5770
$4
$23,080
9
Traffic Control
LS
1
5)5,000
$5,000
10
Storm Water Pollution Prevention ($2500 for plan, $1.50 /LF silt fence)
LS
1
512,500
$12,500
Sub -Total
$2,489,670
10%
Contingency
$248,967
Estimated Construction Duration: 300 calendar days
Total
$2,738,637
City of Coppell Coppel Line D- Construction Estimate 04 -25 -03
Line D Page 4 of 5 April 25, 2003
DEFOREST ROAD
LIFT STATION IMPROVEMENTS
FORCE MAIN LINE D
CONSTRUCTION COST ESTIMATE
Option 5 - HPDE Pipe (Directional Drilling)
Item No.
Description
Unit
Quantity
Unit Price
Total
1
30" HDPE Force Main by directional drilling
Material (30" DIPS DR 17)
LF
7752
$465,120
Installation
LF
7752
$150
$1,162,800
2
Excavation /backfill of access pits
EA
12
$15,000
$180,000
3
30" HDPE Force Main by open cut (SDR 21)
LF
914
$160
$146,240
4
HDPE Fittings
30" 45 deg Elbow
EA
4
53,900
$15,600
30" x 18" Branch Saddle
EA
5
44,500
$22,500
30" Flange Adapter w/ Back -up Ring
EA
2
53,200
$6,400
18" Flange Adapter w/ Back -up Ring
EA
5
$2,700
$13,500
5
Hydrostatic testing of HDPE piping
LS
1
$15,000
$15,000
6
4" Combination AIV Valve
EA
5
$3,000
$15,000
7
Precast M (6' diameter, approx. 10 ft deep)
EA
5
$7,000
$35,000
8
Sod
SY
1680
$4
$6,720
9
Traffic Control
LS
1
$5,000
$5,000
10
Storm Water Pollution Prevention ($2500 for plan, $1.50 /LF silt fence)
LS
1
$10,000
$10,000
Sub -Total
$2,098,880
10%
Contingency
$209,888
Estimated Construction Duration: 150 calendar days
Total
$2,308,768
City of Coppell Coppel Line D- Construction Estimate 04 -25 -03
Line D Page 5 of 5 April 25, 2003
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