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-CITY OF. SAN SBRORDINO - RBQUESTnttiFi6cOUNCIL ACTION
Approval of Change Order No. TWO-
Subject: Rehabilitation of Pavement on
South "E" Street, per Plan No.
7609 FONTANA PAVING, INC.
From: ROGER G. HARDGRAVE
Dept: Public Works/Engineering
Date: 9-20-90
Synopsis of Previous Council action:
June, 1988 Allocation of $676,800 approved in the 1988/89
Street Construction Fund Budget, under Account
No. 242-362-57688.
04-17-89 Plans approved and authorization granted to
advertise for bids.
06-19-89 Resolution No. 89...219 adopted authorizing
execution of Program Supplement No. 54.
10-02-89 Resolution No. 89-394 adopted, awarding a contract
for the low bid price of $354,998.50. ~ ~
05-07-90 Change Order No. One approved, authorizing ~'lan (")
increase of $14,100.00 in price, from $354,998i-;S0~
to $369,098.50. -0
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Recommended motion:
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That Change Order No. Two to the contract for. the Rehabiliati?n:;:'
of Pavement on South "E" Street, in' accordance with Plan NQ.' J
7609, be approved, to authorize extra work cons~sting of
removal of unsuitable material, and installation of additional
asphalt concrete, at an increase in the contract price of
$49,741.12, from $369,098.50 to $418,839.62.
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cc: Shauna Edwins
Andy Green
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Contact penon:
Supporting data atta..hed:
Roger G. Hardgrave
Staff Report, Contract
Change Order No. Two
Phone:
5025
Ward:
FUNDING REQUIREMENTS:
Amount: $49.741.12
Source: IAcct. No.!
242-362-57668
IAcct. DescriDtionl
South "E" Street Pavement
Finance: ~ D~
Rehabilitation.
Council Notes:
75--0262
Agenda Item NO~
CITY OF SAN BERtGRDINO - REQUEST ~R COUNCIL ACTION
STAFF REPORT
The soil borings performed prior to final design of this
project revealed the existence of an old concrete street beneath
the existing asphalt surface. The project design directed the
removal of portions of this concrete street which were higher
than the new street grade.
During construction, a second concrete street was
uncovered beneath the first concrete street. Due to trapped
moisture between the slabs, the soil was unstable and unable to
handle the traffic loads for which the new street was designed.
The existing soil had an R-value of less than 20, rather than
the R-value of 70 used in the design. Based upon recommenda-
tions from the Soils Engineer, the saturated soil was removed
and the excavation was backfilled with grindings from the
existing asphalt concrete. Also, due to the instability of the
soil encountered beneath the road surface, the limits of the
pavement reinforcing fabric was extended to include all areas to
be rehabilitated, and the asphalt concrete pavement thickness
was increased by 1/2 inch.
The cost to perform this additional work is $49,741.12.
All items of work performed were done at the unit bid prices. A
price reduction was applied to all items exceeding 125% of their
original bid quantity, as provided in the Standard Specifica-
tions.
Change Order No. Two increases the contract price by
$49,741.12, from $369,098.50 to $418,839.62. Caltrans has
reviewed the change order and concurs with this extra work.
Therefore, Federal-Aid funds can be used to finance 86% of the
cost of this extra work. The total estimated project cost con-
tained an amount of $60,285.13 for contingencies. The total
amount of Change Orders No. One and Two is $63,841.12. However,
the low bid of $354,998.50 was 33.8% under the Engineer's Esti-
mate of $536,553.00, which leaves ample funds to finance the
cost overrun.
We recommend that Change Order No. Two be approved.
9-20-9.0
75-0264
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SOUTH
CONTIACT CHANG' OGU NO
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7609
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1. Overexcavate unsuitable subgrade material and backfill with .
A.C. grindings:
STA 30+25 to STA 32+50 10' wide x 12" deep
STA 40+00 to STA 46+25 34' wide x 12" deep
STA 55+50 to STA 57+25 34' wide x 18" de.ep
2. Overexcavate unsuitable subgrade material & backfill wi th base:
STA 44+25 to STA 44+75 10' wide 36" deep
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3. Remove concrete slab & backfill with A.C. grindings:
STA 51+50 to STA 52+50 22' wide x 0.44' Thick
4. Over-cold plane unsuitable existing pavement & pave with A.C.
pavement:
STA 62+38 to STA 63+38 (EAST & WEST) 2ea x 48"wide x 3" deep
Increase Contract Items at Contract Prices:
Item No.6, Planing A.C. Pavement
1,173 S.Y. (6.51) . $1.00/SY . $ 1,173.00
Item No.8. Roadway Excavatlon
1.292 C.Y. (1081) @ $8.36/CY . 10.801.12
Item No. 9. Placement of A.C. Grindfngs as Base
2.221 Tons (1151 ) . $5.50/Ton . 12.215.50
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5. Increase thicknes~ of A.C. pavement 'by i inch.
6. Install pavement reinforcing fabric and pavement binder on
entire project surface. .
Increase Contract Items at Contract Prices:
Item No. 11, Asphalt Concrete Pavement
740 Tons (151) @ $27.40/Ton .. $20,276.00
Item No. 12, Paving Asphalt Binder
10 Tons (621) @ $200.00/Ton .. 2,000.00
Item No. 13, Pavement Reinforcing Fabric
B625 S.Y. (481) @ $0.75/SY .. 6,468.75
~ustment of Compensation at Agreed Unit Price
Item No.8, Roadway Excavation --- $1.00 decrease per C.Y.
992 Tons @ $1.00/Ton .. (992.00)
Item No.9, Placement of A.C. Grindfngs as Base
$0.50 decrease per Ton
1740 Tons @ $0.50/Ton .. (870.00)
Item No. 12, Asphalt Concrete Binder --- $50.00 decrease/Ton
6 Tons @ $50.00/Ton .". (300.00)
Item No. 13, Pavement Reinforcing Fabric $0.25 decrease per S.Y.
4125 S.Y. @ $0.25/SY .. (1,031.25)
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49,741.12
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53 Workin
Time Extension
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