ST0301A-AG100810AGENDA REQUEST FORM T H E . ` , T Y . a F DEPT: Engineering
COPPELL DATE: August 10, 2010
k S ITEM #: 8/E
n WORK SESSION n CONSENT 1:1 REGULAR
ITEM TYPE: CONTRACT /BID or PROPOSAL
ITEM CAPTION:
Consider approval of Change Order Number 2 to the Bethel Road IIA (ST 03 -01 A) project in the amount of $98,431.33
for construction of an aerial sewer crossing of Grapevine Creek and minor utility adjustments, as provided for by Water
and Sewer operating revenues; and authorizing the City Manager to sign all necessary documents.
GOAL(S):
EXECUTIVE SUMMARY:
Approval of this change order will allow the city to replace an existing siphon, which is a weekly maintenance issue,
with an aerial crossing.
FINANCIAL COMMENTS:
Funds for this change order will be provided by Water and Sewer operating revenues.
RECOMMENDED ACTION:
ACTION TAKEN BY COUNCIL:
Staff recommends approval of Change Order #2 in the amount of
$98,431.33 and will be present to answer any questions.
APPROVED BY
CITY COUNCIL
ON ABOVE DATE
Motion to Approve
M - Tunnell
S - Hunt
Vote - 7 -0
Libby Ball
2010.08.11
11:10:41
- 05'00'
I #ChgeOrd2l BethelRd. -]A
MEMORANDUM
TO: Mayor Pro Tem and City Council
VIA: Kenneth M. Griffin, P.E., Director of Engineering/Public Works
FROM: Keith R. Marvin, P.E., Project Engineer
DATE: August 10, 2010
RE: Consider approval of Change Order Number 2 to the Bethel Road IIA
(ST 03 -01A) project in the amount of $98,431.33 for construction of
an aerial sewer crossing of Grapevine Creek and minor utility
adjustments, as provided by Water and Sewer operating revenues;
and authorizing the City Manager to sign all necessary documents.
On April 27, 2010 council awarded a contract to JRJ Paving, LP in the amount of
$2,089,019.05 for the reconstruction of Bethel Road from Denton Tap to Penfolds Lane.
This award amount included a $120,000.00 potential bonus set aside for early
completion. Since this award, one previous change order has been approved that
increased the contract amount by $23,505.50.
As discussed in work session at the July 27 City Council Meeting, this change order
allows us to replace a sanitary sewer siphon that conveys sewer across Grapevine Creek
with a new aerial crossing. This siphon was built in the early 1990's and consists of two
smaller diameter pipes with a diversion box on the upstream side of the sewer line.
These small lines are often clogged by rags that enter the sewer system from the
industrial properties along West Bethel Road. When the system becomes clogged, it no
longer works. City staff currently spends many hours every week checking on this
siphon, and cleaning it out on a weekly or semi - weekly basis.
The proposed aerial crossing will be a 12" sewer pipe, and would maintain a constant
grade across the creek. The sewer pipe will be encased in a larger diameter steel pipe
supported by piers, and will be above the normal water level of the creek.
In addition to the aerial crossing this change order includes some miscellaneous utility
adjustments necessary to reconcile the design plans with the field conditions. These
include the bracing of a utility pole, a 24" concrete plug, and demolition of an old aerial
crossing structure.
Approval of this change order will allow the contractor to move forward with the
replacement of this siphon while the bridge is closed and under construction. It's our
opinion that the contractor has provided fair and reasonable pricing for these changes,
and we recommend approval of this change order in the amount of $98,431.33.
Staff will be available to answer any questions at the council meeting.
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CITY OF COPPELL
CHANGE OR EXTRA WORK ORDER
PROJECT: Bethel Road H (ST 03 -01A)
CONTRACTOR: JRJ Paving, L.P.
OWNER: City of Coppell
CHANGE ORDER NO.: Two (2) DATE: August 10, 2010
1. Replace old sanitary sewer siphon with new aerial crossing.
2. Miscellaneous utility adjustments.
Page 1 of 2
Item
Description
Quantity
Unit
Unit Price
Total
ADD: 1.
Demo old aerial
1
LS
$5,491.25
$5,491.25
crossing with piers
2.
30" Drilled shaft
20
LF
$204.00
$4,080.00
3.
30" Formed
20
LF
$306.00
$6,120.00
column
4.
Aerial crossing pier
2
EA
$1,437.50
$2,875.00
cap
5.
Stainless straps
4
EA
$402.50
$1610.00
6.
Concrete anchors
2
EA
$1,173.00
$2,436.00
7.
Concrete pipe
20
LF
$72.45
$1,449.00
encasement
8.
Transition
2
EA
$$448.50
$897.00
couplings
9.
Connect to existing
2
EA
$1,207.50
$2,415.00
10.
12" SDR -35 in
140
LF
$134.55
$18.837.00
casing with spacers
11.
20" coated steel
120
LF
$223.10
$26,772.00
casing
12.
Remove existing
1
LS
$7.820.00
$7,820.00
siphon box
13.
Remove existing
$1,610.00
manhole
14.
Sewer by -pass
1 LS
pumping
15.
De- watering
15.
Testing
16.
24" Concrete plug
17.
Install new blow -off
$4,560.00
assembly
18.
Bracing utility pole
$676.08
Total Additions:
1 LS
$1,610.00
$1,610.00
1 LS
$7,245.00
$7,245.00
1 LS
$2,645.00
$2,645.00
1 LS
$483.00
$483.00
1 EA
$500.00
$500.00
1 EA
$4,560.00
$4,560.00
1 LS
$676.08
$676.08
$98,431.33
Previous contract amount $1,969,019.05
Net increase in contract amount Change Order # 1 $23,505.50
Net increase in contract amount Change Order # 1 $98,431.33
Revised contract amount $ 2,090,955.88
Net increase in contract time of completion 0
Revised Contract time of completion 270 Calendar Days
The contractor hereby accepts this Contract adjustment as a final and complete adjustment in full
accord and satisfaction of all past and future liability originating under any clause in the Contract
by reason of this revision to the Contract.
Recommended by City Engineer Date
Agreed to by Contractor Date
Accepted by City Date