Flood Prone Urban Area

SDE Feature Class

Description Spatial Attributes

Keywords
Theme: Flood Prone Boundary, Flood Prone Area, Flood Prone Urban Area

Description
Abstract 
The flood prone dataset represents a geographical area known as the Permit and Resource Management Department (PRMD) Flood Prone Ordinance 4467.  Flood Prone Ordinance 4467 addresses concerns regarding the impact of grading on existing or future drainage patterns.  Therefore, the ordinance identifies development policies grading and drainage within this designated, sensitive area.

Area boundaries described as follows in Chapter 7 Building Regulations (Article II, Sec. 7-13) at http://municipalcodes.lexisnexis.com/cgi-bin/hilite.pl/codes/sonomaco/_DATA/TITLE07/Article_II__Rules_and_Regulati.html

FLOOD-PRONE URBAN AREA shall include the following areas to the extent such areas are within the unincorporated portion of the County of Sonoma:
(a) That area within the boundaries defined on the north by River Road; on the west by the easterly boundary of the Laguna de Santa Rosa to its intersection with Highway 12 and continuing with the easterly limit of the City of Sebastopol to Highway 116; on the south by Highway 116 to its intersection with Old Redwood Highway then south to East Cotati Avenue and east to its intersection with Petaluma Hill Road; and on the east by Petaluma Hill Road, north to Highway 12 then west to Highway 101 and north to River Road.

Laguna de Santa Rosa shall be the Laguna de Santa Rosa and tributaries thereto, as shown, on the National Flood Insurance Program Flood Insurance Rate Map dated April 2, 1991 and which are within designated Zone AE and, which have a base flood elevation of 75 feet.

Purpose 
The intended use is for notification by PRMD for assessment by parcel.

Supplementary Information 
Creation methodology & resources:
1) new dataset/layer added to ActiveMap application [Ver1 SP2]
2) 01/17/2008, PRMD staff corrected northwest border of the Flood Prone Urban Area to follow the text of Flood Prone Ordinance 4467 (boundary was moved from the western border of Laguna de Santa Rosa which is comprised of F1 and F2 Zones combined to the Laguna's eastern border and revision was approved by Nathan Quarles, PRMD Engineering Division Manager)
3) for ActiveMap Data Capture June 2010 [ver. 2.0.2], no edits needed to rectify dataset to AM_PARCEL 04/01/2010 (no modification to borders of changed parcels & validated topology)

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Status of the data

Time period for which the data is relevant

Publication Information
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Data storage and access information

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