Item 9AItem 9A
CITY OF
SOUTHLAKE
MEMORANDUM
(February 3, 2015)
To: Shana K. Yelverton, City Manager
From: Robert H. Price, P.E., Director of Public Works
Subject: Approve Change Order No. 2 with Wilson Contractor Services,
LLC for the 2013 CIP Pressure Plane Interconnection Valves
project in an amount not to exceed $100,000
Action
Requested: Approve Change Order No. 2 with Wilson Contractor Services, LLC
for the 2013 CIP Pressure Plane Interconnection Valves project in
an amount not to exceed $100,000.
Background
Information: Neel -Schaffer, Inc. (previously Cheatham & Associates) conducted
a water model computer analysis for the City's water infrastructure
network. The model identified five (5) areas within the high
pressure plane which have marginal capabilities during fire flow
situations. The recommended solution for the system is to install
pressure plane interconnection valves (PRV) which will detect the
changes in pressure between the high pressure and low pressure
planes and electronically adjust the water flow accordingly to
supplement the availability of water during a fire fighting situation.
During the Southlake 2030 Water Master Plan Development, this
project was identified as a Tier 1 project.
City Council awarded the contract to Wilson Contractor Services,
LLC (Contractor) on November 5, 2013 to construct the vaults and
install five (5) PRV's at the vulnerable locations identified in the
computer model as having the most significant pressure reductions
during a heavy water demand event, such as a fire event, when the
water distribution system is required to provide higher flows to fire
hydrants.
The PRV's were installed during the summer of 2014 in
underground concrete vaults and the antennas originally specified
in the contract were erected at all five (5) locations. The Rhome
antenna bases for the SCADA communications system were
recently removed so that less obtrusive alternatives could be
researched. This change order with Wilson Contractor Services is
for the work required to install various appurtenances needed to re -
Page 1 of 3
Item 9A
mount the antennas for the SCADA system
replacements are as follows:
The antenna base
N. Shady Oaks Dr. and Dove Rd.
Install wooden light pole (similar to others in the vicinity)
will be added to the southwest corner of the intersection
and the antenna will be attached to the pole.
$10,809
N. Shady Oaks Dr. and Highland St.
Attach antenna to the existing Shady Oaks lift station,
adjacent to the existing lift station antenna.
$16,124
N. Shady Oaks Dr. at Durham Elementary
Install a series of (up to) 5 box style street lights and
attach antenna to the closest pole to the PRV.
$10,983
Southlake Boulevard and Southridge Lakes Parkway
TxDOT is agreeable to the City to attaching the antenna
to the existing traffic signal pole at FM1709 (Southlake
Blvd.) located adjacent to the PRV.
$48,087
Southlake Boulevard and River Oaks Dr.
Install decorative pole and attach antenna.
$11,038
CHANGE ORDER NO. 2 TOTAL
$97,041
The following costs are also associated with the antenna base
replacements. These items are not part of Change Order No. 2 but
will require payment to complete the above mentioned design
changes.
Neel -Schaffer, Inc. Engineering Services Agreement
Amendment No. 2
$10,838
Tri County Electric Cooperative
Street light (up to 5) installation at Durham Elementary
$30,132
Wooden light pole installation at Dove Rd. & Shady
Oaks
$ 4,976
TOTAL OTHER EXPENSES
$45,946
TOTAL COST FOR ANTENNA BASE REPLACEMENTS
TOTAL J$142,987
Financial
Considerations: Funding is available in the CIP Utility Fund to pay for Change Order
No. 2 and ancillary costs. The existing Pressure Plane
Interconnection Valves project has monies remaining in the budget
to pay for a portion of this change order. The additional funds are
available in the TW King Meter Station project that has been
completed.
Page 2 of 3
Item 9A
Strategic Link: The replacement of the antenna bases links to the city's strategy
map relative to the focus areas of Safety and Security and
Infrastructure by achieving the highest standards of safety and
security, improve performance of delivery & operational processes
and investing to provide and maintain high quality public assets.
The Critical Business Outcome that is met by the construction of
these improvements is C1301: Continue to implement Southlake
2030 Plan by focusing on short-term initiatives.
Citizen Input/
Board Review: N/A
Legal Review: N/A
Supporting
Documents: Location Map
Change Order No. 2
Staff
Recommendation: The City Council may approve, amend or deny Change Order No. 5
with Wilson Contractor Services, LLC for the 2013 CIP Pressure
Plane Interconnection Valves project in an amount not to exceed
$100,000.
Staff Contact: Robert H. Price, P.E., Public Works Director
Cheryl Taylor, P.E., City Engineer
Alejandra Ayala, P.E., Civil Engineer
Page 3 of 3
NEEL-SCHAFFER, INC. 1 CHEATHAM & ASSOCIATES
2501 AVENUE J. SUITE 120
ARLINGTON, TEXAS 76006
Wilson Contractor Services, LLC Request for Change Order:
for
CITY OF SOUTHLAKE
2013 CIP PRESSURE PLANE INTERCONNECTION VALVES - ANTENNA MODIFICATIONS
December, 2014
00.11640.000
Item
No
film Description
Unit
Quantity
Prices In
Figures
Total
N. Shady Oaks Drive & W. Dove Road Antenna Modifications
Unit Cost
1
REMOBILIZATiON
LS
1
$1.750,00
$1,750.00
2
REMOVE AND SALVAGE EXISTING ANTENNA
LS
1
$0.00
$0.00
3
REMOVE EXISTING ROHN TOWER (INCLUDING 4'X4'X4' CONC. FOUNDATION)
LS
1
$950.00
$950.00
4
F & I BACKFILL, SITEGRADE & SOD
LS
1
$500.00
$5o0.60
5
WOOD POLE WILIGHT TO BE INSTALLED BY TRI-COUNTY
LS
1
$0,00
$0.00
6
INSTALL 50' +- 2" RIGID METAL CONDUIT WICOAX
LS
1
$5,359.00
$5,359.00
7
ATTACH ANTENNA TO POLE AT 18' HEIGHT W/COAX CONNECTIONS TO VAULT
LS
1
$840.00
$840.00
8
GENERAL CONTRACT ADMINISTRATION AND OVERHEAD 15%
LS
1
$1,409,85
$1,409.85
SUBTOTAL
$io,808.85
TOTAL FOR N. SHADY OAKS DRIVE & W. DOVE ROAD ANTENNA
MODIFICATIONS
Item
No
Item Description
Unft
Quantity
Prices in
Figures
Total
N. Shady Oaks Drive and Highland Street Antenna Modifications
Unit Cost
1
REMOBILIZATiON
LS
1
$1.750.00
$1.750.00
2
REMOVE AND SALVAGE EXISTING ANTENNA
LS
1
S0.00
$0,00
s
REMOVE EXISTING ROHN TOWER (INCLUDING 4'X4'X4' CONC. FOUNDATION)
LS
1
$950.00
$95a00
4
F & I BACKFILL, SITEGRADE & SOD
LS
1
$1,750.00
$1,750.00
5
F & 1 135' +- 7 RIGID METAL CONDUIT WI COAX FOR ANTENNA
LS
1
$8,280,55
$8,280,55
a
F & 15' POLE EXTENSION to EXISTING ANTENNA MAST
LS
1
$450.00
$450.00
-
ATTACH ANTENNA TO MAST POLE AT 18' HEIGHT WICOAX. TO VAULT
LS
1
$840,00
$840,00
8
GENERAL CONTRACT ADMINISTRATION AND OVERHEAD 15%
LS
1
$2,103,08
$2,103,08
SUBTOTAL
$16,123.63
TOTAL FOR N. SHADY OAKS DRIVE AND HIGHLAND STREET ANTENNA
MODIFICATIONS
Item
No.
Item Description
Unit
Quantity
Prices in
Figures
Total
N. Shady Oaks Drive @ Durham Elementary Antenna Modifications
Unit Cost
1
REMOBILI7AT€ON
LS
1
$1,750,00
$1,760.00
2
REMOVE AND SALVAGE EXISTING ANTENNA
LS
1
$0.00
$0.00
3
REMOVE EXISTING ROHN TOWER (INCLUDING 1&' of 4'X4'X4' CONC. FOUND-)
LS
1
$950.00
$950,00
4
F & I SACKFILL, SITEGRADE & SOD
LS
1
S650.00
$650.00
5
WOOD POLES WILIGHT TO BE INSTALLED BY TRI-COUNTY
LS
1
$0.00
$0.00
6
F & 15U +- 2" RIGID METAL CONDUIT W/ COAX FOR ANTENNA
LS
1
$5,359.90
$5.359,90
7
ATTACH ANTENNA TO POLE AT 18' HEIGHT WICOAX CONNECTIONS TO VAULT
LS
1
$840 00
$840.00
8
GENERAL CONTRACT ADMINISTRATION AND OVERHEAD ( 15%)
LS
1
$1,432,49
$1.432.49
SUBTOTAL
$10,982.39
TOTAL FOR N. SHADY OAKS DRIVE AT DURHAM ELEMENTARY ANTENNA
MODIFICATIONS
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Neel -Schaffer, Inc / Cheatham Associates
Arlington, Tx
1/9/20L5
NEEL-SCHAFFER, INC. I CHEATHAM & ASSOCIATES
2501 AVENUE J, SUITE 120
ARLINGTON. TEXAS 76006
Wilson Contractor Services, LLC Request for Change Order:
for
CITY OF SOUTHLAKE
2013 CIP PRESSURE PLANE INTERCONNECTION VALVES - ANTENNA
MODIFICATIONS
December, 2014
00.11640.000
Item
item Description
Prices in
Unit
quantity
Figures
Total
Item
Item Description
Prices in
No.
Unit
Quantity
Figures
Total
Southiake Boulevard and Southrid a Lakes Parkway Antenna Modifications
Unit Cost
1
REMOBILiZAT€ON
LS
1
$1.750.00
$1.750.00
2
REMOVE AND SALVAGE EXISTING ANTENNA
LS
1
$0.00
$0.00
3
REMOVE EXISTING ROHN TOWER {INCLUDING 4'X4'X4' CONC. FOUNDATION)
LS
1
$950.00
$950.00
INSTALLATION OF 800+ FEET OF ELECTRICAL POWER SERVICE 8Y MEANS
4
OTHER THAN OPEN CUT (BORE)
LS
1
S26,087.75
$26,087.75
5
F d I BACKFILL, SITEGRADE & SOD
LS
1
$900.00
9900.00
6
TRAFFIC CONTROL WHILE INSTALLING COAX IN SIGNAL POLE (Not to Exceed)
LS
1
$3,400,00
$3,400 00
7
F&i 70' +- 1-1 i2" RIGID METAL CONDUIT WITH COAX FOR ANTENNA
LS
1
$7,886.45
$7,886.45
S
INSTALL ANTENNA AND COAX TO TxDOT TRAFFIC SIGNAL POLE PER DETAILS
LS
1
$840.00
S840.OD
9
GENERAL CONTRACT ADMINISTRATION AND OVERHEAD (15%)
LS
1
$6,272.13
$6,272.13
SUBTOTAL
$48,086,33
TOTAL FOR SOUTHLAKE BOULEVARD AND SOUTHRIDGE LAKES PARKWAY
ANTENNA MODIFICATIONS
Item
Item Description
Prices in
Na.
Unit
Quantity
Figures
Total
Southlake Boulevard and River Oaks Drive Antenna Modifications
Unit Cost
1
REM081UZATION
LS
1
$1,450.00
$1.450.00
2
REMOVE AND SALVAGE EXISTING ANTENNA
LS
1
$0.00
$0.00
3
REMOVE EXISTING ROHN TOWER (CONCRETE FOUNDATION TO REMAIN)
LS
1
$300.00
$3DO.00
4
8" TOPSOIL ANO SOD OVER REMAINDER OF FOUNDATION BASE
LS
1
$400.00
WO-00
F & 1 14' CAST ALUMINUM LIGHTING POST, CENTURY OAK PX C012 BY ANTIQUE
STREET LAMPS, OR APPROVED EQUAL. W12" OCTOGON BASE WITH 8" BOLT
5
CIRLCE AND CAP, BLACK, INSTALL 4" 36" REBARS, SIZED TO MATCH BOLT
LS
1
$7.448.00
$7,448.00
HOLES OF BASE, AND EPDXY INTO EXISTING FOUNDATION, PROVIDE
GROUNDING
6
GENERAL CONTRACT ADMINISTRATION AND OVERHEAD Q 15%)
LS
1
$1,439 70
$1,439 70
SUBTOTAL
$11,037,70
TOTAL FOR SOUTHLAKE BOULEVARD AND RIVER OAKS DRIVE ANTENNA
MODIFICATIONS
TOTAL N. SHADY OAKS DRIVE AND W. DOVE ROAD MODIFICATIONS
$10,808.85
TOTAL N. SHADY OAKS DRIVE AND HIGHLAND STREET MODIFICATIONS
$16,123.63
TOTAL N. SHADY OAKS DRIVE AT DURHAM ELEMENTARY MODIFICATIONS
510,982.39
SOUTHLAKE BOULEVARD AND SOUTHRIOGE LAKES PARKWAY MODIFICATIONS
$48,086.33
SOUTHLAKE BOULEVARD AND RIVER OAKS DRIVE MODIFICATIONS
511,037.70
ESTIMATED TOTAL ANTENNA MODIFICATIONS CONSTRUCTION COST
$971038.90
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