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Santa Cruz River Grant Road Floodplain Study

Study status:  Approved by FEMA, effective November 28, 2011 

FEMA has approved Letter of Map Revision (LOMR) Case Number 10-09-2016P for the Santa Cruz River floodplain. The LOMR became effective November 28, 2011.  The floodplain/floodway revision for the Santa Cruz River starts approximately one-half mile south of Grant Road and extends north to the Trails End Wash confluence near the Sweetwater Drive alignment. The revisions are based upon updated hydrologic and hydraulic models, and reflect the influence of several levee structures that the District has recently modified and/or certified meet the stringent FEMA levee standards.   This LOMR provides a more accurate map and a narrower 100 and 500-year floodplain. No properties or structures were added to the 100-year or 500-year floodplains. Significantly, this LOMR demonstrates that certain areas are protected by District Levees. These areas would otherwise be part of the 100-year floodplain, but are not due to the levee certification efforts of the District.  This LOMR revises portions of Flood Insurance Rate Maps 04019C1666L, 1667L, 1668L, 1669L, 1688L, 2276L.

The changes result in a more accurate map and a narrower 100 and 500 yr floodplain.  The floodplain/floodway revisions remove properties and structures from the 100-year and 500-year floodplains. No properties or structures are being added to the 100-year or 500-year floodplains. Significantly, this LOMR demonstrates that certain areas are protected by District Levees. These areas would otherwise be part of the 100-year floodplain, but are not due to the levee certification efforts of the District.

Frequently Asked Questions (FAQs)

The most frequently asked questions regarding the re-mapping of the floodplain for the Campbell Wash, the Flood Insurance Rate Maps, Letters of Map Revision, Flood Insurance and more can be found in this LOMR FAQ. The District also has a Flood Insurance page that answers many common questions about flood insurance.

Public Outreach

Public Notice

Proposed Changes to the Floodplain and Floodway Boundaries for the Santa Cruz River from just upstream of Grant Road to just downstream of Sweetwater Drive.

The Pima County Regional Flood Control District has submitted proposed changes to the Santa Cruz River Floodplain and Floodway to the Federal Emergency Management Agency. The proposed floodplain/floodway revision for the Santa Cruz River starts approximately one-half mile upstream of Grand Road and extends north to the Trails End Wash confluence downstream of Sweetwater Drive. The proposed map revision, which reflects better topographic information, includes portions of Sections 20, 21, 27-29, and 33-35 of Township 13 South, Range 13 East and Sections 2 and 3 of Township 14 South, Range 13 East.   If accepted the revised floodplain would modify Flood Insurance Rate Map 04019C1616K, 04019C1617K, 04019C1618K, 04019C1619K, 04019C1638K and 04019C2226K.  Individuals wishing to review the proposed changes should contact Lynn Orchard, CFM, Chief Hydrologist, Pima County Regional Flood Control District at (520) 724-4600.

There is also a printable PDF version of this Public Notice.

Maps

Below is a map of the project area. The map is clickable, so click within a map area or on the map label to get a PDF map showing greater detail. Each map shows the current and proposed FEMA floodplain for portions of the project area.

Clickable index map to access floodplain comparison maps for Santa Cruz LOMR Link to Floodplain Comparison Map 1 Link to Floodplain Comparison Map 3 Link to Floodplain Comparison Map 4 Link to Floodplain Comparison Map 2

If you have trouble accessing the maps through the index map above, they are available below.