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Olivenhain Dam

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Owner: San Diego County Water Authority
Designer: Parsons-Harza JV.
Contractor: Kiewit Pacific Co. Ltd.
Project Manager: Washington Infrastructure Services Inc.
Consultant to Designer: Gannett-Fleming
Consultant to Contractor: Malcolm Dunstan & Associates
Location: Escondido, California, USA
River: Escondido Creek
Height: 94 m
Length: 778 m
Volume of RCC: 1 140 000 m³
Volume of dam: 1 070 000 m³
Reservoir capacity: 30M m³
Design flood: - (reservoir filled by pumping)
Start of Project: 13.06.2001
Start of RCC: 04.02.2002
Completion of RCC: 31.10.2002
Completion of Project: 16.04.2003
Forming of upstream face: GEVR against vertical timber formwork with external CARPI membrane
Forming of downstream face: RCC against 600-mm high stepped steel formwork at a slope of 0.80:1 (H:V)
Forming of spillway: Immersion-vibrated concrete against 600-mm high stepped steel formwork at a slope of 0.80:1 (H:V)
Mixture proportions:
ASTM Type-II cement 74 kg/m³
ASTM Class F flyash 121 kg/m³
Water 119 kg/m³
Coarse aggregate 1390 kg/m³
Fine aggregate 740 kg/m³
Workability:
Loaded VeBe time 12 to 20 sec

Reservoir area before the start of the RCC dam contract (click on image to enlarge)

Excavation for dam from right abutment (click on image to enlarge)

Satellite photograph of dam under construction (click on image to enlarge)

Stockpiles and concrete plant (click on image to enlarge)

December 2001 - Full-scale trial in right abutment shaping block (click on image to enlarge)

March 2002 - Placement of RCC in left abutment shaping block (click on image to enlarge)

March 2002 - Swinger loading RCC into trucks (click on image to enlarge)

March 2002 - Spreading grout against an abutment (click on image to enlarge)

March 2002 - Vibrating GEVR against an abutment (click on image to enlarge)

March 2002 - GEVR after vibration but before RCC roller compacted (click on image to enlarge)

April 2002 - Placement of first RCC in main dam body (click on image to enlarge)

August 2002 - Olivenhain dam from downstream (click on image to enlarge)

July 2002 - Upstream face (formed of GEVR against timber formwork) and Intake Tower under construction (click on image to enlarge)

August 2002 - Spillway training walls under construction on the downstream face (formed of RCC compacted directly against stepped formwork). The spillway was formed of immersion-vibrated concrete placed at the same time as the RCC (click on image to enlarge)

October 2002 - Concrete plant and conveyor from dam (click on image to enlarge)

October 2002 - Quarry and dam nearing completion (click on image to enlarge)

October 2002 - Olivenhain dam nearing completion from left abutment (click on image to enlarge)

31 October 2002 - Completion of RCC placement (1.07M m3 of RCC placed in 8.5 months) (click on image to enlarge)

November 2002 - Completed Olivenhain dam from upstream (click on image to enlarge)

November 2002 - Completed Olivenhain dam from downstream (click on image to enlarge)

3 September 2003 – Downstream face of completed dam (click on image to enlarge)

7 August 2003 – First water into reservoir (click on image to enlarge)

4 September 2003 – Dedication Ceremony (click on image to enlarge)

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