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CONSTRUCTION
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April 16, 2015 52g via E-Mail/
Mr. Joe Wilson
City of Tybee Island
403 Butler Ave
P.O. Box 2749
Tybee Island,GA 31328
RE: Jones Avenue Alternates (REVISED)
Mr.Jones,
Please find below alternate pricing as discussed on Monday, April 13, 2015 during our on-site meeting.
This proposal consists of two alternates to improve the overall condition, cross slope and smoothness of
Jones Avenue. As we discussed, placement of 1.5" over the existing condition will not substantially
improve the smoothness and the existing pavement cracks will reflect back through in a short period of
time.Also included is some information on Open Graded Interlayer which has demonstrated the ability to
mitigate bottom up cracking on several GDOT Projects.
General Assumptions, clarifications and Conditions:
o All furnished materials and work performed shall be in accordance with Georgia Department of
Transportation Standard Specifications for Roads and Bridges.
o In both alternates pricing reflects the use of a Georgia Department of Transportation 9.5mm
SuperpaveR mix at 135 lbs/yd2 for final surface in lieu of the 12.5mm mixture at 165 lbs/yd2.
• This proposal is a lump sum price addition to existing contract and is valid through May 31,
2015, after which R.B. Baker Construction reserves the right to revise prices based on escalation
of raw materials and fuel.
• These conditions must be included as an integral part of any contract entered into with R.:. aker
Construction and shall precedence over any terms of the prime contract or project documents.
Speeiine Exclusions:
o Guarantees and Warranties regarding reflective cracking of new asphalt caused by underlying
pavement cracks or subsurface failure.
Alternate"A": Revise/Change 165 lbs/yd2 of 12.5mm surface mix to 135 lbs/yd2 of 9.5mm TPI mixture
for the final surface. Use the remaining 30 lbs./yd2 or—235 tons +35 tons leveling(as bid) for a total of
—270 tons of leveling to improve cross-section and profile while creating a layer on which the 135 lbs/yd2
of 9.5mm surface can be placed smoother. Additionally a bituminous tack application will be applied to
the existing surface at a rate of.04 gal/yd2 prior to the placement of the leveling course. This bituminous
tack application will facilitate filling of existing surface cracks as a moisture permeation deterrent. A
second bituminous tack application will be made after placement of the leveling to create a bonded
100 Morgan Industrial Blvd. • Garden City,GA 31408 •912.964.6513 •Fax 912.964.6531 • www.rbbaker.com
"A Division of Reeves Construction Company"
Anril 13,2015
City of Tybee Island
Jones Avenue Resurfacing
Job#10168562
Page 2 of 2
interface between the leveling and final surface.
To ^^. °form this alternate scope,we propose a lump sum price increase of$7,500.00 equaling a total
contract price of $163,653.35 to cover the additional material cost of the bituminous tack coot
application of DSO gallons and the add'anal labor and equipment cost iciated with =o
processes.
Alternate "13": Revise/Change 165 lbs/yd2 of 12.5mm surface mix to 135 lbs/yd2 of 9.5mm TPI mixture
for the final surface.Use the remaining 30 lbs/yd2 or—235 tons+35 tons(as bid)+an additional 130 tons
for a total of—400 tons. This 400 tons of mix will be a 9.5mm Open Graded Interlayer. Open Graded
Interlayer(OGI)has been successfully used on many projects as a bottom-up crack mitigation layer while
also providing leveling characteristics. The OGI has a unit weight of 91 lbs/yd2 per inch in depth.
Therefore the 400 tons will provide a crack mitigation layer of—'/Z" in depth. In this process a bituminous
tack application will be applied to the existing surface at a rate of.06 gal/yd2 prior to the placement of the
OGI. This bituminous tack application will further facilitate filling of existing surface cracks as a
moisture permeation deterrent while the OGI layer will serve as a crack mitigation layer. A second
bituminous tack application of .04 gal/yd2 will be applied after placement of the OGI creating a bonded
interface between the two layers.
To perform this alternate scope, we propose a lump sum price increase of $19,500.00 equalling a
total contract price of $175,653.35 to cover the additional material cost of the Open Graded
Interlayeir mixture, bituminous tack coot application of ro1020 gallons and the additional labor and
equipment cost associated with two processes.
We hope this alternate proposal satisfies your request for pricing and we welcome the opportunity to
discuss this proposal in detail or answer any questions relative to this proposal with you. I can be
contacted at(912)964-6513.
Sincerely,
R.B. Baker Construction,a ivision of Reeves Construction Company
Neal Andrews,Asphalt Operations Manager
A;!.chments