T he Round Valle y Re se r voir Str uc tur e s Re fur bishme - - PowerPoint PPT Presentation
No ve mbe r 15, 2017 T he Round Valle y Re se r voir Str uc tur e s Re fur bishme nt and Re sour c e Pr e se r vation Pr oje c t OVE RVIE W T e am Intr oduc tion About the NJWSA About Round Valle y About the Pr oje c t Pr
mbankme nt Modific ations
ading
e dging
Re pair s
ity, “in but not of” the Ne w Je r se y De par tme nt of E nvir
e ate d in 1981 to take ove r and
ate e xisting wate r supply fac ilitie s and imple me nt pr
the State Wate r Supply Plan
ate thr e e wate r supply syste ms:
itan Basin Syste m (Spr uc e Run, Round Valle y, D&R Canal)
voir Syste m
T r e atme nt Plant & T r ansmission Syste m
hr e e e ar the n e mbankme nts c onstr uc te d in 1960s to c lose valle y and impound wate r
lar ge st r e se r voir by volume in Ne w Je r se y
is r e le ase d into the Nor th Br anc h of the Roc kaway Cr e e k ne ar White house Station
he se dams ar e r e gulate d by NJDE P Dam Safe ty Pr
am
Dike & No r th Dam dur ing o r iginal c o nstr uc tio n
e am pumpe d stor age ” – r e se r voir is fille d by 3.2- mile pipe line c onne c te d to the South Br anc h of the Rar itan Rive r
anc h Pumping Station c ontains te n 40MGD pumps
was pumpe d to the r e se r voir
about 6 months, r aising the wate r le ve l by about 10 fe e t
e on site e ve r y day on the dams: mainte nanc e , instr ume ntation r e adings, se c ur ity
e c onduc te d quar te r ly by e ngine e r ing staff
P State Par k Se r vic e ope r ate s r e c r e ational aspe c ts
P Division of F ish & Wildlife ope r ate s fish and game aspe c ts, boat launc h
e nsur e ade quate wate r supply and pr
e built with an e stimate d
ating life of 50 - 100 ye ar s and it’s be e n almost 60 ye ar s; this is an inve stme nt in the State ’s futur e
ds have c hange d sinc e the 1960s – we ar e r e tr
str uc tur e s with the late st e ngine e r ing appr
e ase r e silie nc y and sustainability for long te r m wate r supply ne e ds
So uth Dam dur ing o r iginal c o nstr uc tio n
3 E ar the n E mbankme nts / “Dams”
(da ms a re the 3rd a nd 4th hig he st in NJ)
“Anc illar y” Infr astr uc tur e
I mpro ve me nts
/ fe a ture s
So uth Dam
E ac h unique
Me a sure s to a ddre ss inc lude a lte ra tio ns to e xisting e mb a nkme nts a nd the ir fo unda tio ns:
he fo undatio ns b e lo w the e mb ankme nts (No rth Dam/So uth Dam) –
GROUT ING
he e mb ankme nts the mse lve s (all 3) –
E MBANKME NT MODIF ICAT IONS So uth Dam No r th Dam Dike So uth Dam
Dam Embankment Cutoff Trench Grout Curtain Bedrock
Reservoir Level Looking upstream Top of Dam Extension of Grout Curtains (North Dam/South Dam)
Injection of cementitious grout into bedrock at dam abutments Grout fills cracks in the bedrock to reduce seepage
Area of grouting
Area of grouting Area of grouting
Drill Rig Grout Mixing Plant Drill Rig Examples of grouting construction activities at other facilities
Examples of grouting construction activities at other facilities
Current conditions (no chimney drain) Post-construction conditions, showing chimney drain and regrading
“Chimney” Drain “Toe” Drain New Fill on DS Face
Example of embankment modification at another facility
Examples of chimney and toe drain installation at other facilities
The South Dam inlet channel will be dredged to restore its original design capacity. Dredged material will be stored in a confined disposal facility in a restricted area adjacent to the reservoir. Rendering
confined disposal facility
So uth Dam T
, whe r e the r e se r vo ir is fille d and c an be e mptie d
Vie w o f the inle t c hanne l fr
Vie w o f the So uth Dam T
fr
No rth “T
Re pa irs Othe r unde rg ro und c o ntro ls / fe a ture s So uth “T
T ruc king route from Route 22 (no roa d c losure ) Ope n a c c e ss to boa t la unc he s & fish la b (no roa d c losure ) Roa d c losure a re a for se g me nts of the proje c t
ish & Wildlife informe d a bout a ntic ipa te d wa te r le ve l c ha ng e s a nd the y will try to a c c ommoda te boa te rs
voir is not e xpe c te d to g o be low 25’ from full pool e le va tion (c ompa ra ble to 2016 summe r c onditions)
impossible to pre dic t
a nnounc e d via our e ma il list a nd we bsite
ne a r the South Da m will like ly be re - route d for sa fe ty
e s ma y be ne c e ssa ry for sa fe ty
c oordina te d with the Sta te Pa rk Se rvic e a nd poste d on our we bsite
Re c re a tion a re a ma y be visible but a re not e xpe c te d to a ffe c t the public ’s use of the Re c re a tion a re a
F E AT URE S: