Assertion: lake's level | /r/HasProperty | raised by the addition of flashboards
Facets:
value: between 1967
type: TEMPORAL
value: to the spillway
type: TRANSITIVE-OBJECT
value: between 1970
type: TEMPORAL
Source sentences:
text: Between 1967 and 1970, the level of Sooke Reservoir was raised three times by the addition of flashboards to the spillway.