HomeMy WebLinkAboutHydraulic Model of Sheldon Rd Tank Distribution System 7.17.2006.PDFT G.. MtrLLER P.C.
Engineers and Surveyors
Allen T" Fulkerson, L.S.
David A. Herrick, p.E.
Lee Dresser, L.S.
Frank L. Santeili, P.E.
Andrew J. Sciarabba, p.E.
Darrin A. Brock, L.S.
July 17, 200G
Brent A. Cross, p.E"
Superintendent of public Works
Village of Cayuga Heights
l\4archam Hall
i336 Hanshaw Road
Ithaca, New York 14850
lRe: Hydraulic Model of sheldon Road rank Distribution system
Dear Mr. Cross:
We are pleased to provide this letter report summarizing our results of the hydraulic modelingprroject together with recommendations for physicat impiovements to that portion on the villagevvater distribution sysfe.m served by the sn6tobn Road storage Tank. An extensive fire flowtresting program was initiated by th-e Village of cayuga i"igl',t. Fire Department in september21005 with assistance from the Sor.rthern cayuga [a[e Inteimunicipal water Commission (BoltonF'oint)' Data collected from this program gave iise to concerns that customary hydrant flows werenot achievable in all.segments of the present piping network. Thus, il " Viii"g" Trustees retainedT'G' Miller, P'C' to develop an updated hydraulic riodel of the distribution system, analyzealternatives for improving fire flow conditions and offer a conceptual plan for implementation.
The Sheldon Road Tank service area is bound on the east by Triphammer Road (south of UplandRoad) and The Parkway and Highgate_Road (northr or Upiand Road). lt extends to the north andsouth Village Boundaries and west to Remingion Road. The majority of the land area within theTank grid is zoned'Residence District'and iJcharacterized printipait/"i .ingr" family homes.Exceptions include the. C..aYuoa Herights Elementary scnoot and a'relatively iiratt area zoned'ti4ultiple Housing District' located south of Kline Road and oak Hill Road.
In general, the piping ngtwork is comprised of three distinct zones. A robust, large diameter mainn;nning in an east-west direction along the Upland Road corridor, which delivers high flows; anetwork south of the Upland Road corridor comprised of medium to small diameter pipes wherehltdrant flows are limited by lateral size; and a network north of tne uptano noao corridorcctnsisting of small diameter pipes where hydrant flows are significanily reoucld.
The hydraulic modelfor the Tank grid was developed with Haestad Methods,waterCADcomputer software using. base data provided initially by the Town of lthaca EngineeringDepartment. Additional information lncluding tne geometric conrigur;il;;, pil sizes and theoperational parameters were provicled by the Bolton point DistrioJtion G;;;;r. Additionalhydrant flow tests were completed during January ano ienruary of 2006 to s"upport this exercise.Friction factors for the piping. were adjusted to caiibrate the base model utilizing the results fromallflow test programg. T.he- piping network q1.d major rorpon"nt";th ;;;ing parameters areiderntified on Figure 1' With respect to e,stablishing accepiable hydrant n'ows we retied upon thestetndards of the Insurance services office (lso).For one- and two-family dwellings where theseparation between structures is greater than l CiO feet ISO recommends an available fire flowcapacity of 500 gallons per minute (gpm). With a r"p"rutLn distance of 31 to 100 feet the
203 North Aurora Street r lthaca, Newyork 14g50
Telephone (607) 272-6477 t psy (607) 27g-6822 r www.tgmiilerpc.com
recommended capacity is 750 gpm. While the majority of the service area would fall within the
category of 750 gpm the Cayuga Heights Fire Department has expressed a desire to increase
system capacity to 1,000 gpm or greater.
Existing fire flow capacities generated by the base model are presented on Figures 2 and 2A as
flow'contours' and 'spot'flow capacities at the existing hydrants. As realized through the testing
programs and indicated by the Figures, there are significant areas of the system where hydrernt
flow capacity is less than ISO standards. A related issue is the relatively low number of fire
hydrants throughout the system.
The network south of the Upland Road corridor is well looped and has only isolated areas thett are
deficient in hydrant flow. Specifically, Oak Hill Road, Overlook Road, Devon Road and
Strawberry Lane, where pipe sizes are primarily 4-inch diameter, have insufficient capacity. The
Fire Department is equipped and prepared to fight a fire within 1,000 feet of a hydrant. Since the
deficient areas of the system are limited it is possible to install additional hydrants on adjacenrt
mains where the capacity is adequate to provide higher hydrant flow. Only one new section of
main along Kline Road between Highland Road and Overlook Road is proposed at this time to
improve capacity in this portion of the grid. This new section of main along with nine new hydnant
assemblies proposed south of Upland Road is indicated on Figures 8 and 8A. An estimate o1f
construction cost for these improvements is presented in the following table.
Table 1
Recommended lmprovements South of Upland Road
The deficiencies within the system north of the Upland Road corridor are more widespread with
fire flow capacities dropping to less than 500 gpm within a relatively short distance north of
Upland Road. The low capacities are due to the high friction factor values attributed to the age of
the piping and also the small diameter. Much of the system construction dates to the 1920's and
30's and although the system is looped a majority of the pipittg is only 6 and 4-inch diameter. An
exception is a relatively new 8-inch main along Remington Road west of Sunset Drive. Possible
solutions to increase fire flow capacities that have been analyzed during this study include the
following:
- Pipe cleaning to.reduce scale deposits that equate to high pipe friction factors.
- Interconnection of the system with the Village of Lansing Highgate Circle PRV
pressure grid to the north, which could effectively supply flows from both the north
(Lansing system) and the south (Sheldon Road I'ank).
- Main replacement and/or the installation of new reinforcing mains.
Pipe cleaning is an attractive solution given the advantage of minimizing disruption to the Village
streets and avoiding the associated costs of surface restoration. Fire flow capacities assumirrg all
pipes within the system were restored to a relatively good condition (friction factor C=100) arer
presented on Figure 3. Although capacities are improved, this alternative alone is insufficient to
Description Quantity Unit Cost Total Cost
Installation of New Hydrant Assembly 9 each $4,500 $40,050
New 1O-inch Main on Kline Road from Highland
Road to Overlook Road
530 feet $1 00 $53,000
Total South of Upland Road $93,500
solve the problem of constrained flow from small diameter pipe, especially for the mains runningnorth along The Parkway and HiEhland Road.
'An interconnection with the Village of Lansing system was considered and included in thenrodeling alternatives as a strategy for improving fire flow capacities for the system north oflupland Road' Two interconnection scenaiios ano tne resultant impacts on firl flow are presentedon Figures 4 and 7. The possibility of interconnection without the lnstallation of a new pressurereducing valve (PRV) station, thereby allowing the two viilage systems to ,float, off the SheldonlRoad rank, was rejected mainly bec-ause it would result in i tower level of ,"ri"* for the Villageof Lansing customers' Similarly, the installation of a new pRv rt"tion that would interconnect thes;ystems without affecting the level of service in Lansing was rejected due to the limited hydraulicbenefit received for a significant investment in additional infrastructure.
l-he effects of repla-cing existing rnains and installing new reinforcing mains are presented onFigures 8 and 8A' The hydraulic benefits are signifiJant and the lso hydrant 1ow standards canbre satlsfied' Further, the expectations of the Fiie o"puttr"nt are substantially achieved. Theimprovements recommended in the following table include five new hydrant assemblies for ther(3asons discussed above for the areas south of Upland Road. The improvements are listed in theorder of priority.
All cost estimates are very preliminary and do not include the cost of rock removal and customarycontingencies' other'trenchless' technology sugh as pipe bursting and directional drilling may bepractical for the replacement of existing miins, when'appropriatelther" uppiou.hes should beconsidered to reduce construction ,rotL and disruption io village streets. lf pipe cleaning isdetermined to be a cost effective method-or improving tiil no*inen we sugiJrt tr.r" 6-inch mainon Cayuga Heights Road be considered for a pilot stJOy.
wel trust this report and the attached figures are helpful in developing improvements for theSh'3ldep Road Tank grid. The updated'computer model will continue to be a useful tool for
Description
lnstallation of New Hyd"*t A-r*.bly
Quantity Unit Cost Total Cost
5 each $4,500 $22,500
f,rew 1u-rnch main on cayuga park Road between uplandFload and Cayuga park Circle
Fleptacement to-in.n *in * ftu@
Fload between Upland Road and Highgate place
\lew 1O-inch loop main on Higfrg"tffi
Birchshire Road and Highland Rorad
230 $1 00 $23,000
5,330 feet $1 00 $533,000
450 feet $1 00 $45,000
r\ew tu-tncn toop matn on Remington Road between
Sunset Drive and Cayuga HeightJ Road
Replacement tO-in
llyegl xgrygto1load and Hielhsate Road
Total North of Upt"nJn*O
.---
610 feet $1 00 $61,000
1,430 feet $1 00 $143,000
$827,500
evaluating further alternatives that you may consider. We look forward to presenting these
findings to the Village Trustees.
Respectfully,
A/ t anMLrt*rw
Frank L. Santelli. P.E.
Enclosures
t(
tr,
d(\
s
U
\-- \\ o
cr \ oo\\ "eO NET}\IO'MAIN, FROM.HIGHGATE ROAD TO
, EERKSHIRE ROAD'
\ r-a (450 tF)
E//
I 0' \REPL{CAIE|{T MAIN,
CAYUGA HEGHTS ROAD
'rFRoM R+{NGToN ROAD TO
\lilcHGATE,RoAD (1,430 tF)
FROM\sUNSET
(610 LF)
-*'r%ru#HJ\ffi?
-rT"ffi
qg o$'q
NEIY FIRE TITIMNI TO 8ErADDm TO DISIRIBUT|ON
srsrEM, wplcAl oF (5)
NoRIH oF UPLAND RoAb.
IU XUHCEMENT MAIN. FROM^c .ueurNo noAD To riiCiirAri'v^ a G"* G =]-LY::q:r-u = J a
SSko,"
--u
oocfr
ffiea=a
n frEa'- R ",:9 n
F'
it
i't
Et:
c
c
,rli
-_l!&
n!l"€i
sii
fl
Uor
{
n
n$'.1 l\
, t1\trdlt
" ql
E rl
\icii? I
ttr
c
F!
t
t
0
$
"^ *">: ' \
''t '01\
ilst
$n
\ 4-l\Er"
r\\S
^\ 0lt \\
a\t 0
. ""\ o.
_. l[
U IIl
ll!\
s
q\'
0
S cr , ---EES
: 's.u(-o* oto *o
nE
o
.11
I
oFi
I
N
o
"LB
U
I
b
n
o
rt
t0
F
!
!€--o'{AL5,,\ Y
tr -I\a ttv il-r-ilnU,IU
;;
c
lo u
i- 4
i-o !!o_ \!-5
"^ olJ\" "/i\\ *t,
"\o ll\\ tlo i)u
P{UJ
\tq\
PRIORITIZED LISI OF IMPROVEMENTS
1.:-lrysr4l NEw tt(AIN oN KLTNE ROAD FROMHIGHLANO ROAO TO OVERLOOK ROAD.
3;'UFIff, (RL^[l tr oMNT ASSEMBUES sorrrH
!:.lllgi+t .!Ew spuR M^tN oN cAn cA PARK RoADBEIWEEN UPLANO ROAD AND O{YIJGA PEN< CINCW-
8;'Uilj_5 (ilr$* rrrlRANr NSEMBLTE5 NoRrH
5. XEP-IACE M^,IN ON THE PARKWAY AND HIGHGATERoAD BEBvEEN UpLAND RoAD eNo HlcxocrE pLAde
8i^l[Tf i# \il i1[,oil,.1'ff*T'Fo*'*
z:_lNqA!! NElv MAjN ON REMtNsroN RoADEmvEEN SUNSET Onrvg ruo clvucl HE|GHTS ROAD
3#P#1'"K&3i.W:|-JT.,?ff*+.?*.
iE
a
0
0!
l-
l\
rB
I
%'- 4\"r i
-"4 P c,\ii .I
VILIAGE OF CAYUGA HEIGHTS
WATER SYSTEM MODET
SHEI,DON ROAD TANK GRID
/(,r. ) c:o,t
The second issue that Supt. Tamboteile taised was one of great concern to him as well as the
Vrtllage Engineer, and the rest of the Village. \X/hen he looted up the date of the last Village-
wrde fte hydrant test, he found that the most recent test had been done in 1988. So, dudig
the months_ of Septemb et and Octobet, with the help of Bolton Point, the fire department
tested all of the hydrants in the Village of Cayuga Herghts. The tests were perfor medlate atnight so as not to disturb vtllage residents with the -"i., pr"rrure drop "nd th" taffic flowrnterruption fiom the ftucks; the CHFD fuefighters, along with the probationalT membersof the fue departrnent conducted the tests.
The Fte Supt' could not find any tesults from the 1988 tests, just that they were perforned.Pictures taken inside.:"T" of the pipes (and passed around at the me"ting), ,ho-"d"tuberculation" and 'sclerosis" of the pipes, which had decreased their ,ru6t" size (insidediarneter) considerably
\X/ith the help of Engineer Btent Ctoss, Fne Supt. Tamborelle showed two maps that he had
!tt1t9.{ showrng the location and flow l:Lte ofeach hydrant tested in the V,X^g.. The rnapshad different colored stars on them, showing the location of hydrants with u.Septabie andunacceptable flow rates' The blue stars indicated working hydrants with at leusil,000
gallons of flow per rninute, while the yellow stars showeJthe lo.ution of hydrunt, with lessthan 1,000 gallons o,f flow per minute. Tamborelle noted that fot ahydrantto farl the test ithad to register less than 500 gallons per minute flow, and that some dre hydrants did noteven register any flow.
E'ngineer Cross and Supt. Tambotelle ptoceeded to explain their specific areas of concern
and some initial ideas for dealing with ihe most serious problem areas.In certain
^1ie
s, natnelr. the "New village" Q.Jorth of cayuga Heights Road), the hydrants
aae not wgrking propedy in several large ateas, such that if th.r" -"r" to be a structure fre,there would be rnadequate watel to pui it out effectiveiy. Bolton Pornt suggests puttfrg innew mains along Cayuga Heights Road and the Parkway, in order to bring?ore'water intothis area' These lines would be at least 8 inches in drameter and would be of steel exteflor
and cement interior construction.
Other worrisome areas such as the Ovedook and \X/ycoff areas could be dealt with in an
emergency using a steamer hydtant,which has huge volumes of water, or by using new,smaller hoses that the fte depar:tment just bought and which can be reverse attached.to thetuck' They can also draftwzte.r ftom ponds, us w.ll as using the tanket system which
Lansing is going to train thern in shortly.
Engrneer Cross thanked Fire Supt, Tamborelle for his hard work and initrative in finding andrnapping this impotantinformation. He agrees thatitis a problem of concern and, that along term solution needs to be lbund. Wuir main replacerient in the Village would be veryexpensive because of replacing sidewalks, landscaping, etc. He predicts it w;uld costbetween several hundreds of thousands of dollars to"u -iJlion iolurs to replace it all!Mr' Cross also mentioned that he was surprised at the orientation of the mup; h. would haveexpected the old paft of the Village to be in worse shape than the n.* Viluj.. He was alsosurprised that thete was no tranr;ition between the good and bad hydrants, Jnd ther.for. noexplanation for what went wrong with the bad hydrants. Because of this, he feels that wemay be able to find one ot-two ptoblem points that arcmaking several hydrants not functionpropedy, such as a blocked pipe or line.
Mt' Cross feels that many possible options shouid be explored and that we should not put alot of money into any opttons until they arc ail.Iooked into.
Bolton Point also feels
-that before any solutions are attempted, that an engineering model
should be created whlch would help to determine what acion should be ti'ken, or whatothet research is needed. Dar,td Hetick of TG Miller Engineering would be very interestedin the ptoject; they have done this type of water system trrla.Ltrg t th. past for bu and theCity of lthaca, and he would be available irnmediately to help wit the p-1".,. His work
would include: rnore hydrant testing, more bypass testing, .o-pot", mode1ng of theproblem, fitd-g strategies to fix the problem, estimatinfcosts of various solutions.
Trustee McClelland had a question about whether the eigineer from TG Miller wouid beable to foresee rnany possible problerns that the system ciuld have, and Mr. Cross answeredyes, he has a lot of experience with the practtcal problerns inherent in water systems and willbe proactive in seekrng them out.
E'ngineer Cross is aware that they will have to staft over at the beginning, testing water flowat each hydrant, in order to get a cleat picture of the problem and to make sure that there arenot simply problems with the valves.
Atty' Tyler asked if the valves are the same ages as the pipes, and Treasurer Silber askedwhether or not we had aheady tested the valves. He biought up the risks associated with
l"t*g (opening and closing) tkLe valves, which could precilitate more problems.Mr' Cross answered ftl, y"-t, it was dangerous to test th. vulves due to the dsk of breakage.Trustee Staley asked what they rtt"t" -ud. of, and Mr. Cross answered that the stem wasmade of cast iron. The DPW could do some valve replacement.
Mr' Ctoss says that the punch line is that the situatiorineeds attention! We need to startworking on this problem irnmediately, with an initial cost analysis of $10,000,leaving roomfor an increase in budget, not to exceed $20,000.
Treasutet Stlber repotted that there was $47,500 in the capitalfund to spend, and Mr. Crosssuggested making a statement in a resolution about -here the money -i1 .o-" from. Mr.Cross asked Atty Ty19r if they had to act immediately on the problern, now that they knowabout it, and Atty. Tytet_ answeted yes, if not acted on now, it could become a liability issue.Trrrstee Staley wants to know if there was ever a plan to get dd of the small, 2 nchdiameterpipe'- He also brought up the iilea of using.um"iu, to lolk for a clog in the pipes whichcould potentially be causing the malfunction in some of the hydrants.
Tnrstee McNeil said that she thmks there needs to be a Vrllage-wide plan, instead of just
addresstng problems one at a tirne. Trustee Staley agreed; thly both i"el we should belooking at the roads and sewers as well, at the same trme,
Mayor Lynn says that they are gorng to ask TG Mriler to do that - to look at the whole
system on arztge scale, before narrowing the problem down any fafihet.
Engineet Cross said that they have be.n proaitive about videotaping the sewer pipes, andthat they don't see any problems in the near future. He mentioned that there is a newtechnology using trenchless piping, which will not save any money but wrll be much lessdisruptive than the conventiona.lmethod. There needs to be 600 feet between each prpe,300 ft in each ditsgtim.
E'ngineet Cross asked if thete w,ere 2frl more questions or whether they should vote.
Motion by Trustee Collyer
Seconded by Trustee McNeil
MorroN To APPROVE RESOLUTTON 6165: To AUTHORT1ET]HESUPERINTENDENT OF PUBLIC WORKS TO ENGAGE T.G. MILLERENGINEERS IN A STUDY OF THE VILLAGE WATER SYSTEM AND MAKE A
RECOMMENDATION FOR REMEDIATION, FOR A SUM NOT TO EXCEED
$20,000.
Wheteas, the Village FD and Bolton Point Water System have done hydrant testing
which has resulted in an area of low fire flows, and
Whereas, the Village Engineet, in conjunction with Bolton point Water System, hasdetermined that the water,system requires further detailed investigation t; determine
the source of the low fire flow, and
Wheteas, T.G. Millet, PC is alocalengineedng firm with expertise and experience inperforming such water system investigation and modeling, and now
Thetefote, the Village Board of Trustees hereby authorizes the T.G. Miller topetform an investigation of the water system and pr.pare a recommendation for
temediation, and
Therefote, T.G. Miller, PC will provide such services on an hourly basis not toexceed $20'000 with money taken from the water project of the CapitalFunds.
Ttustees Antil, McNeil, McClelland, Staley Mount and Collier voted yES.