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l,." Mission Creek Box cS1'vert
oject: at Tippecanoe
Folan No. 7098
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Date:
File No.
ENGINEERING DIVISION
DEPARTMENT OF PUBLIC WORKS
CITY OF SAN BERNARDINO, CALIFORNIA
CONTRACT CHANGE ORDER NO. ~
(Change necessitated because of field conditions)
TO:
Bonadiman - McCain, Inc,
P.O. Box 6444
San Bernardino, CA 92412
11-09-87
1.363
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Gentlemen:
You are hereby authorized to perform the following items of
extra work:
Item
1. Install 2 5" ducts
2. Pour Concrete Taper between Decks
3. Install Reflective Siqns on Temporary Railinq
4. Lower Bottom Controls elevations
4.29 CY @ $400/CY per bid item 13
*Copy of Change Order with reflective signs. Santa Fe was to
have started widening adjacent crossing in October, now set
for January. Traffic Engineer recommended reflective warning
markers due to de ay. ,
Total extra work cost added to contract .............................$ 2,763.10
Cost
$ 264.52 L.S.
291. 58 L. S,
491.00 L.S,
1,716.00
Previous Contract Price .............................................$ 233.880.71
Amended Cost Pri ce .................................................. $ 235 ,643 .81
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Additional time to complete contract due to change order ............
CONTRACTOR:
CITY OF SAN BERNARDINO:
By:
By:
Title:
ROGER G. HARDGRAVE
Director of Public Works/City
Accepted Date:
Approved Date:
Engr.
(ij)
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'~ITY OF SAN BE~ARDINO ~ MEMORANDU~.1r
To RAY SCHWEITZER, City Administrator
From JON ROBERTS, Field Engineer
Subject Widening Tippecanoe Avenue at Mission Creek
Date Decent>er 17, 1987
FILE 1.363
Approved
Date
The following is a description of the extra work activities involved with the
proposed Change Orders No. 1 and 2 on the above subject project:
Change Order No. 1
During excavation of the new box-culvert, the soil at the subgrade elevation
was found to be saturated with water. This was due to infiltration of runoff
waters within the Mission Creek. This condition was not reflected in the soils
report data. The saturated soil cannot be compacted and provides an unsatis-
factory foundation. The contractor excavated an additional foot of unsuitable
material and replaced it with 3/4" rock.
Had the contractor been paid for this work under the contract bid items, un-
classified excavation and backfill, as is specified in the standard specifi-
cations, the additional cost would have been approximately $3800. However,
the contractor agreed to do the work for his cost of labor and materials plus
mark-up, for the net cost of $2000.71.
Change Order No.2:
Item 1: Install two 5" Ducts
During construction the contractor installed two 5" diameter ducts within the
bridge deck concrete. These conduits will be available for use by the City
to facilitate any lines which may be required for future construction of City
owned utilities. The contractor installed these ducts for his labor and mate-
rial costs plus standard mark-up for a net cost of $264.52.
Item 2: Pour Concrete Taper between Decks
After removal of the asphalt pavement from the existing bridge deck, it was
discovered that the elevations shown on the plans prepared by Associated Engi-
neers were incorrect. This resulted in a difference in the bridge decks of
approximately 2 inches. The contractor poured a small concrete apron between
the decks in order to protect the new asphalt paving layed over the decks. The
contractor did this work for cost plus mark-up for a net cost of $291.58.
Item 3: Install Reflective Signs on Temporary Railing
The second phase of the widening of Tippecanoe has been delayed awaiting approval
by Santa Fe Railroad. In order to protect traffic from the existing railroad fa-
cilities, temporary concrete barrier rail was placed as an item of work under this
contract. Upon review of the traffic flow by the Assistant Traffic Engineer, it
was recommended that reflective chevron signs be placed at the temporary barrier
rail in accordance with the Cal-Trans Traffic Manual. The contractor installed
these signs for cost plus mark-up for a net cost of $491.00. Both the barrier
rail and the reflective signs can be salvaged and reused by the City after com-
pletion of the widening of Tippecanoe Avenue.
ADDITIONAL INFO ITEM #53
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, C(:ITY OF SAN BEfQARDINO Q. MEMORANDUM
To RAY SCHWEITZER, City Adminstrator
From
JON ROBERTS, Field Enginee
Subject Widening Tippecanoe Avenue at Mission Creek
Date Decerrt>er 17, 1987
(CONT'O)
Approved
Date
Item 4: Lower Bottom Controls
A portion of the work on this project was designed by the County Flood Control
Department, Their plans detailing the construction of concrete bottom controls,
which serve to reduce erosion of the Mission Creek, contained errors in the
elevation of the existing creek bottom. The invert of the bottom controls had
to be lowered to match existing elevations resulting in an increase in the
quantity of concrete over the estimated amount in the bid item.
This bid time is specified as a "final pay quantity" and cannot be increased or
decreased without an approved change order. The contractor poured an extra 4.29
cubic yards in addition to the 20 cubic yards in the original estimate.
The low bid price for this project was $231,880.00. The project funding included
$13,320.00 for construction contingencies. The actual final contract price
including all proposed change orders is $227,941.71, due to a lesser amount of
curb & gutter, sidewalks, driveways and handrailing constructed than the quantities
estimated. The County Flood Control Department is contributing 50% of the cost
of this project and, therefore, will be contributing 50% of the cost of these
change orders.
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