The
City of Roseville is located within portions of two major drainage
basins: the Pleasant Grove Creek Basin and the Dry Creek Basin.
Pleasant
Grove Creek and its tributaries drain most of the western and central
areas of the city, while the Dry Creek basin and its tributaries drain
the remainder of the city. The Dry Creek system has year-round flows in
its major watercourses, while the Pleasant Grove system is intermittent
in nature with only seasonal flows.
As a result, portions of the city
lie within a flood hazard area as was evidenced by the 1986 and 1995
floods. However, since 1950, there have been no reports of structural
flood damage along Pleasant Grove Creek and there are presently no
structures subject to flooding within the Pleasant Grove Creek basin due
to the City's floodplain management policies.
Seven creeks,
draining the 80-square-mile Upper Dry Creek Basin, pass through and join
within the city limits of Roseville.
The northern boundary of the Upper
Dry Creek Basin is in the Newcastle area. The Basin does not include
runoff from snow melt in the Sierras. Less than seven percent of
property within the City of Roseville is affected by flooding and most
of this property is open space (vacant land).
The potential for
flooding is present during every winter season. The following
information will help you plan
for, avoid, and if necessary, respond to a flood.