Res. No. 080-99-10704RESOLUTION NO.
30-99-10704
A RESOLUTION OF THE MAYOR AND CITY
COMMISSION OF THE CITY OF SOUTH MIAMI,
FLORIDA,RELATING TO CONTRACTS,
CONCERNING DRAINAGE,AUTHORIZING THE
CITY MANAGER TO ENTER INTO A CONTRACT
WITH MIRI CONSTRUCTION INC.,TO
CONSTRUCT THE 78 STREET AND 63 AVENUE
IMPROVEMENTS,AT A COST NOT TO EXCEED
$30,000.00,AND CHARGING THE DISBURSEMENT
TO "STORMWATER TRUST FUND --
MAINTENANCE AND REPAIR OF STREETS AND
PARKWAYS"ACCOUNT NO.111-1730-541.4640.
WHEREAS,the Mayor andCity Commission of theCity of South Miami have identified
theintersection of SW78StreetandSW 63r Avenueasneeding stormwater drainageandother
roadway improvements,and;
WHEREAS,Miri Construction,Inc.has been pre-approved bythe City of South Miami
for roadway construction work through Resolution No.33-99-10657 which adopted thefee
structure from a City of Coral Gables competitive bid contract.
NOW,THEREFORE,BE IT RESOLVED BY THE MAYOR AND CITY
COMMISSION OF THE CITY OF SOUTH MIAMI,FLORIDA:
Section 1.The City Manager is hereby authorized to enter intoa contract withMiri
Construction,Inc.,to construct the 63rd Avenue &78th Street improvements.
Section 2.The contract with Miri Construction,Inc.isnotto exceed $30,000.00.
PASSED AND ADOPTED this 13th day of April,1999.
ATTEST:
TH
CITY CLERK
READ AND APPROVED AS TO FORM:
CITY ATTORNEY ~~'
APPROVED:
MAYOR
COMMISSION VOTE:5-0
Mayor Robai na :Yea
Vice Mayor Oliveros:Yea
Commissioner Feliu:Yea
Commissioner Bethel:Yea
Commissioner Russell:Yea
CITY OF SOUTH MIAMI
INTER-OFFICE MEMORANDUM
TO:Mayor and Commission DATE:April 13,1999
FROM:Charles D.Scurr SUBJECT:Agenda Item #f+
City Manager ^)Commission Meeting,
April 13,1999
AUTHORIZATION OF THE CITY
MANAGER TO ENTER INTO A
CONTRACT WITH MIRI
CONSTRUCTION
CORPORATION TO CONSTRUCT
THE63rdAVENUE/78™
STREET DRAINAGE PROJECT
AT A COST NOT TO EXCEED
$30,000.00,FOR FISCAL YEAR
1998/99.
The attached resolution seeks approval to allow the City Manager to enter into a contract with
Min Construction Corporation to perform the improvements outlined in the attached plans.In
brief,the proposed project will add drainage,fully reconstruct the street,install a turf drainage
system (described further below),andaddstreet trees.
This particular project involves addressing a number ofchallenging issues.First and foremost is
an exceptionally poor drainage situation.Stormwater from several hundred linear feet of
pavement all drains to this intersection,an intersection with inadequate drainage capabilities.
The drainage situation is further aggravated by sediment transport in the stormwater runoff from
the unpaved parking areas adjacent to the street.These sediments clog the existing drain,
exacerbating the flooding problem.As a result of the street flooding,there has been pavement
deterioration and the formation of potholes,a traffic hazard.The overall consequence of these
interrelated problems has been the creation ofan unsafe,unhealthy,an unaesthetic public street.
One other contributing factor to the above described situation is the presence of numerous utility
cuts through the roadway.The utility work appears to have been largely unregulated,and has
resulted in a poorly patchworked pavement.Moreover,the position of the underground utilities
greatly complicates the installation of new drainage systems.Virtually every utility is present:
gas lines,multiple water lines,multiple sewer mains,underground telephone conduit,and
overhead electric lines.Working around these utilities makes the project more hazardous and
more costly.
/continued...
o
.^t«W«W^»^<ifcj^r-^iy.,-
Mayorand City Commission
78 Street &63rd Avenue Project
April 13,1999
Page 2 of2
A traditional solution to the sediment runoff and drainage problem would be to convert all the
unpaved areas in the right-of-way to an asphalt surface,andadd several storm drains This
option,however,is not aesthetically desirable considering the residential character of the
surrounding area.Therefore,another design solution was sought.
The proposed solution is to install a 'turf system"that will provide rapid drainage,decrease
runoff volume,prevent sediment transport,prevent surface soil compaction,and create a grass
lawn appearance for the roadway swales.The GrassPave system (see attached product
information)appears to address all of these concerns,and shall be used to augment a
traditional"drainage system consisting ofa catch basin with 80 linear feet ofexfiltration trench.
In addition,street trees are proposed along 78th Street in order to further improve aesthetics
However,because ofthe overhead electric lines,the choices are greatly limited.The ERPB has
approved a row of alternating Silver Buttonwood and Firebush trees based upon the
recommendation of Public Works.
Miri Construction has been approved by the City Commission for general roadway work through
Resolution No.33-99-10657 which adopted a competitive bid contract this firm has with the City
of Coral Gables.J
The contract with is not to exceed $30,000.00 (base bid of $25,600.00 plus a contingency)and
shall cover the basic services stipulated in the RFP,as well as any pre-approved "change order"
services (i.e.,contingency)specifically authorized by the Public Works Department
The total expenditure would not exceed $30,000.00,and the disbursement would come from
account No.111-1730-541.4640 entitled "Stormwater Trust Fund -Maintenance and Repair of
LZtn ayS"'™S account currently ha*a balance of $45,461 remaining for fiscalyear1998/99.
Attachments
Drawn by:DKG
Reviewed by:FJR
Dale:4-5-99
"City of Pleasant Living1
'&Drainage Plans
\venue &SW 78 St
South Miami,Florida
o
BSU
northJ
1"=30'
•EGNED
SewerManhole
WaterValve
UtilityPole
FireHydrant
OverheadElectric
UndergroundTelephone
Unpaved/Grass/GraveI
e—
Sidewalk
Swale
y3Hte«;rf»:fv>i<c-iirt*r^^^^
UnpavedParkingArea
Sidewalk|
Right-of-wayLine
I
!S
Ia
!-5
CO
ICO
Paving&DrainagePlans
SW63AvenuekSW78Street
SouthMiami,Florida
ProposedExcavationArea
SW78Street
ExistingSHEET
C-2
1 01 ^!'!Cp0!.it:(l ^1 I <•:I T(t^-^
i S i I vci Uut tonw^vj..,'•I;obu:.,h
M I'M 'KJI IfKJ '!U .ii;.«.j..i<.if kj
80 'of F'rench Drain
\
140 'x 5 'Cru/J'rivf;/one \
\
Pav ing I.imils-
o1"=30'
LEGNED
O Sewer Manhole
~Water Valve
•UtilityPole
V Fire Hydrant
<£Overhead Fleetr ic
BST=Underground Telephone
-**•'Unpaved /Grass /Grave I"Z^C*Proposed FI ow Direct ion
psS^j Match Existing Elevation
HMJ Proposed Elevation
.9-1 Exist ing Elevation
20 'of French Drain ^
(Infiltration Gal lery)f!
100 'x15 'GrassPave Zone
4 'Diameter Vaul t with F-3 Inlet,
or USF#464 1/6492 Ditch Inlet
ocacled in GrassPave Zone
SW 78 Street
Paving Limits
THE CITY OF SOUTH MIAM
"City of Pleasant Living"
Paving k Drainage Plans
SW 63 Avenue k SW 78 Street
South Miami,Florida
Proposed
Construction
SHEET
C-3
Cily of South Miami
b 130 Sunset Drive.South Miami.Florida .33 143
TO:
FROM:
CITY OF SOUTH MIAMI PUBLIC WORKS DEPARTMENT
MEMORANDUM
Deem Snare/
MiriConstruction
David K.(iuodio-/
Engineering Inspecu^"
DATE:March 4.1999
SUBJECT:Request tor Pmp,i«,.i
78lh Street &63rd Ave.
Paving &Drainage Project
80 If of French Drain
20 If of French Drain (infiltration gallerv)
4 diameter sump catch basin w/baffle "
r-3 Inlet OR USF#4641/6492 Ditch Inlet
i!K:S-SSiSrmction (repair sub8radc &base p-DC *->
An'nies^sol0^5^6 Wrf SySt6m (S6e ^^pr°dUCt info>w'8**.-x«ilc "»<*
Hand-dig around all utilities where necessary
Orade all areas as shown,remove ail excess material
nKStf!*8 in^luding barricades for road closure durins Pr°ie«'^construction and 1-year Maintenance Bond
Lert.ficat.on of final elevations are in substantial compliance with plans
/continued ...
"City ofPleasant Living"
Miri ('(instruction
78«"Street Sc 63rd Ave Project
March 4,1999
Page 2 of 2
JE :»ct 3°3rsr sss.t"*ii t •?brucr ,o ins,an -«***«•*««•»cos.UiOerence.so .ha.wo ca^c^££1 eonsST ""^""^-*
••lease inspec.U,project location,and provide me wi.h a"no,.0 exceed"cos,„o«proposal.
Call me if you have any questions at (305)663-6350.
Miri Construction,Inc.
y^Engineering Contractors
Date:March 24.1999
To:David Goodin,City of South Miami
From:Dion Suarez,MiriConstruction,Inc.
Subject:Paving and Drainage Improvements atSW63Ave.andSW78Street.
PROPOSAL
7340 S.W.121 :
Miami,Fla.331
Tel.:233-5266
Our price for material,labor and equipment to complete the work as shown on plan
sheet C-1 (dated 3/4/99)is$25,600.Thebreakdownisasfollows:
Itcm#
(I)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(II)
French drain80IfX$55/lf $4,400.00
Infiltration gallery 201f X$45/lf 900.00
4'$CB w/F-3 frame &cover 1X$1500 1,500.00
Road reconstruction 450syX $12/sy 5,400.00
I 1/2"asphalt overlay 450syX $3/sy 1,350.00
Grass Pave2200sfX$4/sf 8,800.00
Sod 2500 sf X $0.30 750.00
Sidewalkreplacement 500.00
MOT 1,000.00
Construction &maintenance bond 500.00
Asbuiltdrawing 500,00
$25,600.00
Notes:
Item #1 -15"perforated pipeina3 foot trench.
Item #2-Nopipeincluded.
Item#3-Cost of F-3CB or ditchinletissame.
Item #4 -Existing limerock base tobe repaired as needed.
Item #6 -We do not have any experience working with Grass Pave therefore price
could be lower,to be negotiated later.(Price includes material).
Item #8 -Sidewalk needs tobe replaced if F-3 CB used.
Price does not include stripping after asphalt overlay.
Please call me sowe can discuss the prices in more detail.
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Firelanes
OurlongandweUestablishedhistoryofprovidingsafe,wellcon
structedfirelanesbeganin1982withourfirstjobinSnowmass,
Colorado,nearAspenSkiResort.Sincethenwehavefirmly
establishedourexpertiseinthisareawithtestshavingbeendone
byseveralfiredepartments,beginningrighthereinAurora,
Colorado.SeetheLabCompressionlestResultsonPage7.An
Irving,CA,FireDepartmenttestcanbeseenonPage11.
p,e™ntethatthesedetailsareschematicinnature.Designershallspec^
anddesignofedgetreatments.Spacingwillvarywithturftype,slope,andfire
departmentrequirements.
g)^hy^^
GroundedcobblesonleftandprecastFlushconcretecurbingshownonleftand
concreteorbrickpaversonrightraisedconcretecurbonright(heightvaries).
Visitourwebsiteforupdatednewsonthisapplicationof
Grasspave2.YouwillalsofindourCD-ROMdiskhelpfulwhen
designingfirelanes.Electronicspecificationsareincludedaswell
asCADdrawingssimilartotheonesshownhere.Strengthis
requiredinthebasecoursedesigntoholduptheseheavyvehicles.
Primarilywhatwouldbeusedunderasphaltpavingissimilar
tothatrequiredunderGrasspave2.Designverticalcontoursin
accordancewithlongaxlespacing.Submityourplanstoyour
applicablefiredepartmenttoobtainapproval.Wecanassistwith
supportivedocumentation.
Strength When Installed
5,700 pounds per square inch (psi)can be exerted on sand-filled
rings without deflection or compromise to safety,when resting
upon a base course thick enough and compacted to 95%Proctor.
The ring form is the strongest shape for grass paving in that it
has no weak corners.Supporting heavy loads with the rings
allows us to use less plastic in
the product,hence a 92%void
area-for root development,com
bined with unbelievable
strength!Lessplasticmeans
lower cost to you.
120 psi Maximum on Public
Highways!
Even empty,Grasspave2 will
support 2,100 psi (14,470 kPa)
-well over the 120 psi high
esttrucktirepressure allowed
on public highways.Thisisa
safety factor of17 times.When
Grasspave2 is filled withsand
forpartoftherootzonemedi
um,thestrength increases to
5,700 psi (39,273 kPa).The
safety factor increases from 17x
to 47x.The heavier a vehicle,
themoreaxlesandtiresit
needs to support the load being
carried.Grasspave2 willmeet
and exceed all loading criteria.
Vehicle Loading Examples:
Auto tires:40psi
Truck tires:110 psi
DC-10 tires:250 psi
F-16 tires:350 psi
Fire truck with outriggers:81
psi(70,000lb.truck distrib
uted to four outrigger pads=
Base Strength Is Critical
All grass paving reinforcement structures are designed for two
primary functions -transfer loads through the walls of the prod-M
uct to prevent compaction,and provide small cellular confine
ment areas for optimal growth,stability,and protection of the
grass root zone.Arigid base below all grass paving products is
required to receive and spread
Lab Compression Test Results
Load-bearing capacity of sand-filled Grasspave2 rings vs
concrete,and vehicle loading examples
Runoff ComparisonChart
Runoff coefficients,Grasspave2 and sandy gravel base
overvarioussoiltypes.
23 4 56789 10
Inches ofRain During 24 Hours
17,500 lbs.each with 12"X18"surface contact with Grasspave2)
All these vehicles are well within our 5,700 psi loading capa
bility.Be sure your base course design is sturdy enough,and our
rings will easily do the job under all conditions.Also plan to
strengthen concrete sidewalks and curbing that will be mounted
bv fire trucks.
loads that aretransferred
throughthestructure.Some
load spreading exists onthe
bottom ofour products,but
shouldnotbefactoredinto
design calculations.The upper
layerofpavement cross-sec
tions,whetherasphaltor
grass,is appropriately called
the"wearing course"and func
tionsto transfer loadstothe
base course.
WaterRunoff Concerns
Parkon grass!It will be afford
able as compared to asphalt
and will provide the porosity
necessaryforstormwatercol
lection,which isa major con
cerninmanycommunities.
Detention basins,manholes,
and underground piping will
notbe necessary in most situa
tions.Also many existing trees
canbesaved,andnewtrees
plantedtofurtherassistin
reducing runoff.Pleasereferto
ourrunoffchartfor coefficients
over various soil types.You'll see
that Grasspave2 with sand fill
can totally absorb upto 5"of
rainfall ina 24-hour period and
the rates are excellent up to 12"
in a 24-hour period.The runoff for asphalt is 95%for any amount.
Drainage of Base
Be careful not to create a bath tub effect if subsoils are not porous.A
Install Draincore^underground drainage mats to move water
away.Having a sandy gravel base directly beneath Grasspave2
(continued on page 11)
m
^rgerollssayeinstallationdollan-h^thifasttstgrasspayingsysteml^
applytoGrasspavei,Gravelpavt*,DralnconiandStopetamei.Customrollsizes
availablebyrequest
InvisibleStructures—StandardProductRoilSizes
WidthLengthDiameterAren
Model
1020
qpw..
1620
-riMo*
m
If^JJ
13.3
ISE
10S2J
ft»
MM
2065.6
60164
1.54.9
JM5&WJ3S1
2065.6
0.82.7
...iiJJm»
0.82.7
J&eE
_10._'108
20215
30323
CWi20q-
56123
•RollcutnariudwithuttrUnihouldbeintulWb»liftiMmMhi~,i-am-»inL
*»*•"**••*•-,•
77
(continuedfrompage7)
providesforgooddrainageatthesurfaceandmakesthefirelaneor
parkingareanotonlysaferbutmoredurable.Doasiteinspection
whenthebaseisinstalledtoensurethedepthsareaccurateand
drainageiseffective.
BaseCourseDesign
Calculatingthedepthandcompositionofmaterialsforthebase
courseincorporatesthesamedesigncriteriaasforotherpavements:
•loadbearingcapacityofnative(orfill)subsoil
•plasticityorimpactofmoistureon
strengthandlongevity
•frostheavepotential
•trafficload,frequencyand/orduration.
SampleBaseCourseDepths
Pleaseconsultwithasoilsengineer
forsite-specificbaserequirements.
Generally,thedepththatisusedunder
asphaltwillbetherequirementunder
Grasspave2.Golfcartsandpedestrian
trafficmayrequirenothingoversandy
gravelsoils,andjust2"to4"(5-10cm)
oververyweaksoils.Carsusuallyneed
4"to8"(10-20cm).Buses,trucks,andfire
truckscaneasilyrequire8"to12"(20-30
cm)ormore.Theuseofgeotextiles,
thoughnotrequired,belowthebasewill
preventintegrationwithsubsoilsandis
stronglyadvisedinareasofclayorsilt
soilsandfrostheave.
FillingGrasspave2withTopsoil
IsUnwise
Rememberthatwearebuildingaroad
waywithgrassasthesurface.Maintainingporosityforairand
watermovementisveryimportant.Whenorganic,clayorsilt
particlesareintherings,compactioncantakeplacewithinthe
smallcells,defeatingthestructure,andrestrictingaccessbyair
andwatertoroots.Growinggrassinsandoverasandygravel
roadbaseismoredifficulttogetestablished,buthorticulturally
andstructurallyitworks!Ifrutsshouldappearinafinished
installation,topsoilhasbeenusedeitherundertheringsorwithin
therings,contrarytoourinstallationinstructions.
SeedingGrasspave*isPopular
InCaliforniaandothertemperateclimatezonesmanyofour
installationsareseeded.Waitingforaperiodoftwomowingswill
ensurethattherootsystemiswellestablished.Seedingallows
totalcustomizationofplantselectionandeliminatespossiblecon
taminationoftherootzonefromclaybasedorhighpeatcontent(
sod,bothproblemswithhighuseareas.
92%RootAreaand100%GrassCoverage
Ourinstallationsarehardtofindbecausetheyareinvisible!
Withsolittleplasticnearthecrownofthegrass,thebladesof
grassarenotsmashedbyproduct.Rootdevelopmentisnotinter
ruptedfromspreadinglaterally.Theringsarestrongandrigid,
keepinggrassrootsystemsprotected
fromharm.Therootsgrowdirectly
downwardanddeeplyintothesandy
gravelbasecourse.Grasspave2by
InvisibleStructuresis,byfar,thebest
possible"living*'pavingsurface
designedbyalandscapearchitect.
Grasspave*Uniqueness
•Largerollsforfastinstallation-10
to125m2
•92%rootareaforbestgrassgrowth
•Strongrigidringsthatconformto
undulatingterrainwith•
flexiblegridbetweenrings
•100%recycledpost-consumerplastic
•Hydrogrow-polymer,fertilizer,soil
amendmentprovidedfree
•Rollscanbecutandshapedwith
pruningshears
DupontCenter,Irvine,CA—Firedepartmenttestingof
Grasspave*withsand-filledringstodeterminestabilityof
outriggerswhenladderwasextended.Below:Firelane
shownyeanlater.Grassenhancedthelandscapingand
softenedtheappearanceofthisbuilding.
CSIGrantsSpecificationNumber
02795PorousPaving-RecognitionbyCSI
hashelpedestablishlegitimacytothe
porous(grassandgravel)pavingindus
tries.Nowwecanallagreeon02795!Asdesignersexpandtheir
useandacceptanceofporouspaving,theindustrywillgrow.
CreativityWithHardSurfacePavers
Ideasinclude:CombineGrasspave2withflushpaths,padsormark
ersofconcreteinafirelaneforpedestriantraffic,designelements
ordelineation;usebrickpathwaysthroughthegrass;filltherings
withotherplantmaterialssuchasdaisiesandgroundcovers;lay
stripsofconcretetodefineparkingareas,especiallyhandicapped
parking;checkerboardsofgrassandpaversorotherpatternsto
beenjoyedfromhigh-riseoffices;designofcompanylogosinthe
parkinglotsorfirelaneswithpolymer-boundcoloredstone;narrow
residentialstreetswithguestparkingongrassshoulders.