the paltinu dam

8/13/2019 The Paltinu Dam

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The Paltinu Dam

The Paltinu dam is situated in Prahova County, on the downstream of Daftana river and

its confluence with Sycamore Valley, the keys called “The Covers”.

Paltinu Lake is a reservoir for drinking water, spread on a length of 3 km, offering a

breathtaking view. Both banks offer favorable conditions for the settlement of camping and

holidays cabins. Located in a outstanding mountain settings, Doftana basin and river Doftana lies

at the confluence of the creek Paltinoasa and Secarina. Situated at an altitude of 650 m,

Paltinoasa Lake occupies an area of 215 ha.

Paltinu dam is located in Prahova County , on the downstream of Doftana River valley at

its confluence with Sycamore Valley ,in the keys named “La Tocile”.

Because of the geomorphological difficult conditions of the site, there was adopted the

version of a concrete arch dam with double curvature point perimeter . This solution involved the

creation of a foundation base extended on the left with a wing dish. This solution implied the

creation of an extended foundation on the left bank with a wing dish. This socket allows a

balancing section where the dam itself is executed and allow better retrieval modules of the

rocks from the two slopes. Also, the base permits a better adaptation of the local geological

conditions, by filling the empty spots with alternative rock. The foundation soil was enhanced

with a veil of concrete milk. Between the dams left bank and the parabolic slope was performed

a concrete abutment, which contributes to a better cooperation with the slope of the dam.

The dam has a height of 108 m above the foundation, the dam cres elevation is at 654 m

above the see level. The total length of the dam crest is 455. For the dam stabilizations additional

work was implied by strengthen both slopes with prestressing anchor.

In spite of all this work, during the first fill of the pond, large infiltrations were detected

which exceeded 150 l/sec and movement of the spring contact structure and the wing central

dish. As a result, they performed various additional work including supplementation veil seal

drainage system amplification and downstream side cover left slope with concrete blocks which

increments 6 – 8 m deep with anchored pretensionate cables. With all these modifications, the

infiltrations stopped and the behavior of the dam were in the corresponded limits.



The works for Paltinu dam started in 1966 and the dam was opened in 1971. A second

phase of consolidation has been executed between 1976 – 1982.

The Paltinu dam, serves mainly for drinking and industrial water in Campina and Ploiesti

countys. In the alternative, the dam also provide water to irrigate 9000 ha in the Prahova county.

The Paltinu dam is included in the water management system which also includes the following

works:

The Voila dam on the Daftana river

Water treatment station at Voila

Voila water supply pipe which serves to supply water do towns on the route

The wells for groundwater abstraction in the Baicoi area

Regularization of the Dambul river in the area of Ploiesti

An PIF 1971

River Doftana

Dam Type Spring

Ground foundation Rocky

Hight 108 m

Crest lenght

455 m

Lake volum 53,7 mil. mc

Lake surface 197,5 ha

Use Water supply

electrical energy

Irrigation

Basin surface 334 kmp

Flow 760 mc/s

Depth

Plan of situation Section



At this rate it will take approximatuvely 1000 years for the reservoir capacity to

decrease by 10% due to sediment accumulation. Since 85% of the incoming sediment is

trapped by the reservoir , and the sediment load delivered by the rivers to the reservoir is

0.826*1010

kg/year, the sediment load released from the reservoir is 0.826*1010

kg/year,

the sediment load released from the reservoir is (1-0,87)( 0.826*10

10

) kg/year = 1.14*10

9

kg/year.

Assuming that the average flowrate of water released from the reservoir is equal to

the average flowrate entering the reservoir (= 8,26*1010 m3/year), then sediment

concentration downsteam = sediment load released

= 1.14*109 kg/year / 8.26*1010 m3/year

= 0,133 kg/m3

the paltinu dam

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