12-109.00 Spokane Rock Products: 2012 Street Preservationa
CHANGE ORDER TO CONSTRUCTION CONTRACT NO: .12! PIT r.
DEPARTMENT.OF PUBLIC WORKS
PROJECT: 2012 Street Preservation Project - Phase 1 CONTRACT DATE:
CONTRACTOR: Spokane Rock Products, Inc CHANGE ORDER NO: 4
CAPITAL IMPROVEMENT PROJECT NO 0160
BID NO.: 12 -017
DESCRIPTION OF CHANGES
This Change Order pays to Install a. 24 Inch wide concrete traffic Island on the south side of the Dlshman -Mica Road / 16th Ave. intersection.
The trafffic Island was removed to allow temporary traffic control to transition during grinding and paving operations,
See attached CO exhlblt. It also pays for electrical mobilization for additional loop Install at NB LT lane at Schafer Rd intersection.
Item No Description uantl Unit Price Total
Bch C - 40 CONCRETE TRAFFIC ISLAND MOBILIZATION LS 1 $500.00 $500.00
Bch C : 41 ISLAND TEMP TRAFFIC CONTROL LS 1 $320.00 $320.00
Bch C - 42 CONCRETE TRAFFIC ISLAND BY 44 $105,00 $4,620.00
Bch C - 43 ADD. ELEC. MOB FOR NB LT TURN LANE LOOP INSTALL LS 1 $250.00 $250,00
Total Amount of this Change Order ( Incl. Tax): $5,690.00
SUBSTANTIAL COMPLETION
Original Date: 812412012 Prior to this Change Order. 8/27/2012 Including this Change Order: 8/28/2012
Ortglnal Working Day 25 .... Woiklrg Uays..Added.t : this.CO:
1. .::V1/dfking Day, Inc1tf$ng thIkCO: 27
THESE CHANGES RESULT IN THE FOLLOWING ADJUSTMENTS OF TOTAL CONTRACT PRICE:
ORIGINAL TOTAL CONTRACT AMOUNT .
- » 630 76 $3
» . $•.. _
TOTAL PRIOR CONTRACT CHANGE ORDER AMOUNT 66;735.26
» »» »... , ».n» .�..... »."» »,:, »,
TOTAL CONTRACT PRICE PRIOR TO THIS CHANGE ORDER , _ » » w - 687,634.73
NET THIS CHANGE ORDER
b;690 00
TOTAL CONTRACT,AMOUNT,INCLUDING THIS CHANGE ORDER $ .... " _ ..693.2.24.73
CONTRACTOR ACCEPTANCE:
The contractor hereby accepts this adjustment u
RECOMMENDED BY:
APPROVED BY:
APPROVED BY:
terms of the orlgtnal contract for all work performed,
DATE:
DATE :
DATE:
neTF•
ORIGINALS T0: Contractor, City of Spokane Valley Clerk's Office, PW Project File
. '.:.;.
G`OPIE3To:! PW Prd a fnd P: PubicW6 :ksiPutdaingfCO(dP2812C07
C01'Z-10q
ALIGN EDGE
WITH WEST FACE
OF EXISTING
ISLAND 1"R.
4"
EXISTING
GRADE
d'
PAVEMENT —I 6
2'
16" /, 4
#4 REBAR CONTINUOUS.
PLACE ON TRAFFIC SIDE
OF CURB OLD ISLAND
FOOTPRINT
N
4"
NOTES: "- #4 BAR AT 4' O.C.
1. CEMENT CONCRETE SHALL BE AIR - ENTRAINED CLASS 4000 IN
ACCORDANCE WITH SEC 6 -02.
2. EXPANSION JOINTS SHALL LINE UP WITH REBAR AT 4' O.C.
CONCRETE TRAFFIC ISLAND CURB
N TS
a
SECTION 8 -101 TRAFFIC ISLANDS
8 -101.1 Description
This work shall consist of constructing traffic islands or median curbs to line and detail as shown
on the Plans or as directed by the Engineer.
8 -101.2 Materials
Reinforced doweled curb shall be constructed with air - entrained concrete Class 4000
conforming to the requirements of Sections 6 -02 and 8 -04 and the plans.
Island nosings shall be constructed of Class 4000 air - entrained cement concrete and in
accordance with Section 6 -02 and with the plans.
Exposed aggregate concrete shall be 6 sack commercial concrete or an alternate Engineer -
approved mix provided that the coarse aggregate gradation shall be 100 percent minus 3/4-
inch.
If specified, precast traffic curb shall conform to the requirements of Section 8 -07.
Traffic island fill, where shown on the plans, shall be a crushed surfacing top course meeting the
requirements of Section 9- 03.9(3).
8 -101.3 Construction Requirements
Section 8 -101.3 is supplemented with the following:
In locations where a delineator is shown on the median, the contractor may place a 3"
(inside) diameter PVC sleeve prior to pouring concrete to ensure the delineator can be
installed without damaging the rebar.
8- 101.3(1) General
The area between the curbs of the islands shall be backfilled with crushed surfacing top course
and covered with 4 inches of exposed aggregate concrete. Crushed surfacing shall be
thoroughly compacted. Two inch diameter holes shall be drilled through the existing pavement
into the subgrade at the low points in the island or as directed by the Engineer to allow the
moisture that may accumulate to drain away. The backfill inside the island shall be graded to
effect a slope of 1 -inch per foot for the concrete surface, to facilitate drainage, and shall be at a
level such that the surface of the exposed aggregate is even with the top of the curb.
The surface of the concrete shall be both floated and trowelled. The aggregate shall be exposed
by simultaneously brushing and flushing with water or by use of a retarder on the surface. Care
shall be taken in exposing the aggregate in order that bond will be maintained with the particles.
Depth of exposure shall be a maximum of 3/16 -inch. A sealant, Tri -Kote Concrete Treatment or
approved substitute shall be placed on the finished surface prior to the acceptance of the work.
The finished median curb and island shall conform to line, grade, and cross - section. The
horizontal variance shall not be greater than 1/4 -inch when checked with a 10 -foot straight
edge, nor greater than 1/8 -inch in a 5 -foot distance or less. The vertical variance shall not be
2012 St Preservation Project — Phase 1 CO 4 Specifications
2
greater than 1/4 -inch when checked against plan elevation. The cross - section dimension
variance shall not be greater than 1/4 -inch.
8- 101.3(2) Special Considerations
Restrictions for Clearance. Occasionally situations arise wherein the island curbs become so
close together as to make it extremely difficult to form them separately. In order to
accommodate this situation in a consistent manner, areas of the traffic island where the curbs
are closer than 24- inches measured from outside face to outside face shall be formed
monolithically of cement concrete, with NO exposed aggregate concrete used in the space
between.
Special Requirements for Cross Walks. When shown on the plans, traffic islands must
accommodate pedestrian traffic. Consequently, special consideration must be made for the
pedestrians' safe passage.
Pedestrian ways may take the form of either a pass- through or a normal wheelchair ramp and
sidewalk, as provided for below.
1. Pass - throughs shall be created by dividing a single traffic island as necessary to
create two or more smaller traffic islands. The pass - throughs shall be a
minimum of 6 -foot in width. The surface of the HMA or PCCP shall be finished in
a manner that will allow water to drain out of and away from the pass- through.
2. For islands of sufficient size, curb ramps shall be used. A minimum 5 -foot length
landing is required between ramps. The ramps shall be connected with 5 -foot
wide City standard sidewalk with a broom finish. The sidewalk area shall be
separated from the exposed aggregate island surfacing with expansion joints. All
other sidewalk standards apply including lateral expansion and contraction joints.
The Contractor may choose to construct the island surface in one phase, provided there is an
expansion joint between the sidewalk portion of the surface and the exposed aggregate portion
of the surface. The Contractor may elect to construct the island surface in two phases, in order
to make it easier to achieve the required surface treatments. In this case, there will be no extra
compensation made for constructing the surface in multiple phases.
It shall be noted that utilization of the standard doweled island curb does not allow for ramp
thickness where the plane of the ramp intersects the plane of the pavement. In order to address
this, the Contractor shall chip or saw the pavement to a 4 -inch depth and remove the required
amount of pavement as to allow for full thickness of the ramp concrete. The edge of the
chipped area which coincides with the normal face of curb shall be vertical and neat in
appearance, so that when the ramp concrete is poured against it, the resulting work will present
a uniform line. In this case, the work to chip or saw and then remove the required portion of
pavement shall be considered incidental to the work and there shall be no extra payment made.
2012 St Preservation Project — Phase 1 CO 4 Specifications
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8 -101.4 Measurement
"Concrete Traffic Island " will be per square yard as measured from face of curb. Curbs
forming the exterior edge of Traffic Islands shall be included in square yard cost of "Concrete
Traffic Island ".
8 -101.5 Payment
Payment will be made in accordance with Section 1 -04.1 for each of the following bid items that
are included in the proposal:
"Concrete Traffic Island ", per square yard; shall be full payment for the tools, labor,
equipment, and materials required or necessary to construct traffic island(s) in accordance with
the Plans and Specifications. The work shall include cost to drill holes in the newly constructed
pavement, furnish and install dowels, and place the Concrete Traffic Island to the width and
length shown on the plans.
2012 St Preservation Project — Phase 1 CO 4 Specifications