Ag Preserve Timeline

An illustrated chronology of events which shaped the wonderful level of land protection we enjoy today.



1966-68

Ag Preserve Zoning District debated and enacted with the passage of Ordinance # 274, establishing minimum twenty acre parcel size in the Ag Preserve.

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1968

Suit filed by Napa Valley United Farmers seeking an injunction to prevent Ordinance #274 from becoming effective.

1971

Superior Court upholds validity of Ordinance #274.

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1973

Established minimum 40 acre limit in Ag Watershed areas.

1977

Ordinance #541 adopted expanding the Ag Preserve in north Napa area by approximately 1,300 acres.

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1979

Board of Supervisors adopts Ordinance #610 increasing minimum parcel size in Ag Preserve Zone from 20 to 40 acres.

1980

Measure A, an initiative limiting the population growth in the unincorporated county areas to 1% per year passes.

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1990

Measure J, an initiative that prohibits conversion of agricultural lands to non-agricultural uses without a vote of the people unless conversion meets with certain specified criteria passes; lawsuit immediately filed challenging validity of Measure J.

1994

County established 160-acre minimums in Ag Watershed & Open Space areas.

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1995

California Supreme Court upholds validity of Measure J.

1999

Groundwater Ordinance passes, establishing protection & priority of groundwater for agriculture and requiring groundwater permits for new non-ag wells.

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2008

Measure “P” passed by voters. It extends Measure “J” until 2058 and strengthens Measure “J” by including a policy that the minimum lot sizes for Agricultural Watershed & Open Space designated lands cannot be changed without a vote of the people.


1966-68

Ag Preserve Zoning District debated and enacted with the passage of Ordinance #274, establishing minimum twenty acre parcel size in the Ag Preserve.


1968

Suit filed by Napa Valley United Farmers seeking an injunction to prevent Ordinance #274 from becoming effective.


1971

Superior Court upholds validity of Ordinance #274.


1973

Established minimum 40 acre limit in Ag Watershed areas.


1977

Ordinance #541 adopted expanding the Ag Preserve in north Napa area by approximately 1,300 acres.


1979

Board of Supervisors adopts Ordinance #610 increasing minimum parcel size in Ag Preserve Zone from 20 to 40 acres.


1980

Measure A, an initiative limiting the population growth in the unincorporated county areas to 1% per year passes.


1990

Measure J, an initiative that prohibits conversion of agricultural lands to non-agricultural uses without a vote of the people unless conversion meets with certain specified criteria passes; lawsuit immediately filed challenging validity of Measure J.


1994

County established 160-acre minimums in Ag Watershed & Open Space areas,


1995

California Supreme Court upholds validity of Measure J.


1999

Groundwater Ordinance passes, establishing protection & priority of groundwater for agriculture and requiring groundwater permits for new non-ag wells.


2008

Measure “P” passed by voters. It extends Measure “J” until 2058 and strengthens Measure “J” by including a policy that the minimum lot sizes for Agricultural Watershed & Open Space designated lands cannot be changed without a vote of the people.