Flood Risks in Rio Linda Elverta

This file is http://riolinda.info/flood/risks.html

FLOOD RISKS, RIO LINDA/ELVERTA COMMUNITIES
by Erwin Hayer, eeh625@hotmail.com - updated October 26, 2005 V1.3

Copyright 2005 Erwin Hayer

FEMA INFORMATION
The 100-year flood zones of four FEMA Flood Insurance Rate Maps (FIRM) Maps are used to determine Risks.

HOMES located in the areas of flooded streets identified below may be at flood risk.

To view these maps, visit the FEMA Flood Map Store at http://store.msc.fema.gov. Select Catalog, then select FEMA Issued Flood Maps, California, Sacramento County, Sacramento CO* (this is unincorporated Sacramento County) then select "Find FEMA Issued Flood Maps". Click on the green "View" button for the map to view. The maps may also be purchased from FEMA. FIRM maps are in the process of being updating and digitized.

0602620055E FLOOD INSURANCE RATE MAP (FIRM) 07/06/1998 Western Area, Rio Linda/Elverta
0602620060D FLOOD INSURANCE RATE MAP (FIRM) 07/06/1998 Eastern Area, Rio Linda/Elverta
0602620065F FLOOD INSURANCE RATE MAP (FIRM) 07/06/1998 Western Rio Linda
0602620070D FLOOD INSURANCE RATE MAP (FIRM) 07/06/1998 Eastern Rio Linda

DRY CREEK WATERSHED
The size is approximately 64,399 acres or 100.62 square miles.
Map: http://riolinda.info/watershed.html
see also http://www.placer.ca.gov/planning/legacy/dc-crmp/figures/figure_1.1_dry-creek-watershed-location.pdf
see also http://www.drycreekconservancy.org/data/DryCreekWatershedBasemap.pdf

The Dry Creek Watershed in the Rio Linda and Elverta area is as follows:

The western boundary at the Sacramento/Placer County line starts about 2,600 feet west of Watt Avenue and continues in a south western direction, crossing:

Elverta Road just east of Bellingrath Drive,
U Street just west of Sixteenth Street,
Q Street just west of Dry Creek Road,
M Street about Seventh Avenue,
Elkhorn Boulevard just east of West Second Street,
Ascot Avenue (City Limits) between West Fourth and West Sixth Streets.

The Eastern boundary starts about halfway between Elkhorn Boulevard and Q Street at Twenty-Eight Street and follows a generally south western direction, crossing:

Twenty-Fourth Street near Q Street,
Elkhorn Boulevard to the south just west of Twentieth Street,
Elkhorn Boulevard to the north just west of Sixteenth Street,
Elkhorn Boulevard to the south just east of Dry Creek Road,
G Street just west of Tenth Street,
E Street near Tenth Street,
Ascot Avenue (City Limits) about halfway between Rio Linda Boulevard and the Sacramento Northern Bike Trail

LOCATIONS WITHIN THE DRY CREEK WATERSHED

Cherry Island Area

The area between the two channels of Dry Creek, from Elverta Road to downstream of Rio Linda Boulevard is subject to flooding during any heavy rainstorm such as December 1955, March 1986 and January 1995.
Much of the Cherry Island Golf Course will flood.
Dry Creek Road and Q Street will be overtopped between their two Bridges and be closed.
Cherry Lane and Curved Bridge Road can have upwards of three feet of floodwater. Homes on these roads are at risk. Many were removed or raised.
Elkhorn Boulevard will remain above the floodwater between the two Bridges. Homes on this road are at risk. Many were removed or raised.
Rio Linda Boulevard will be flooded and closed between Marysville Boulevard/Fourth Street and Robla/Rio Linda Creek.

Upstream of Cherry Island Area

Elverta Road will be flooded and closed between Twenty-Eighth Street and Gibson Ranch Park Road.
Portions of Gibson Ranch Park will be flooded.
Portions of Antelope Greens Golf Course will be flooded.

East of Cherry Island Area

Twenty-Fourth and U Streets may be flooded and closed. Most homes in this area are at risk but some that have flooded have been raised. The homes on Twenty-Fourth Street south of the flooded area will have to get the closed gate on Twenty-fourth Street just north of Q Street opened for residents to leave or return.
Eighteenth, Twentieth, and Q Streets area may be flooded and closed.
Elkhorn Boulevard at Sixteenth Street may be flooded and closed. Some homes in this area may be at risk.
Dry Creek Road north of Elkhorn Boulevard may be flooded and closed. THE CHURCH, is at risk.
Elkhorn Boulevard west of Dry Creek Road will be flooded and closed to the Bridge. The Rio Linda Senior High School Stadium is at risk.
Roy Hayer Park and the Rio Linda Junior High School Playground will be flooded. The Restrooms and Snack Bar Building at the park were constructed on high ground to avoid flooding.

West Of Cherry Island Area

Edinburgh Drive may flood. Some homes may be at risk.
Hitching Post Court may flood. Some homes may be at risk.
Trading Post Court may flood. Some homes may be at risk.
U Street east of Eighteenth Street may flood. Some homes may be at risk.
Twentieth Street south of U Street may flood. Some homes may be at risk.
Sixteenth and Q Street area may flood. Some homes may be at risk.
O Street east of Dry Creek Road may flood. Some homes may be at risk.
Tenth Street north of Oak Lane may flood. Some homes may be at risk.
Oak Lane from Front Street to Tenth Street may flood. Some homes may be at risk.
Curved Bridge Road southeast of Oak Lane will flood. Some homes may be at risk.
Radalyac Court and JC Court will flood.
K Street east of Seventh Street may flood. Some homes may be at risk.
Sixth Street north of Elkhorn Boulevard will flood. Some homes may be at risk.
G Street east of Rio Linda Boulevard may flood. Some homes may be at risk.

ESCAPE ROUTES

During a storm equal to the 1986 and 1995 storms, driving across the Dry Creek watershed in the Rio Linda and Elverta area will impossible as Elverta Road, Q Street, Dry Creek Road, Curved Bridge Road and Elkhorn Boulevard will be flooded and impassable.
The West Side area can escape to the west on Elverta Road until it is flooded at Sorrento Road and Elkhorn Boulevard.
If the Natomas area becomes flooded, both Elverta Road and Elkhorn Boulevard may become impassable to the west. In that case, the East Levee Road to the north may be the only escape from the area on the West Side of Dry Creek. If Natomas does not flood, the East Levee Road to the south could be an escape route if the gate on the south side of Elkhorn Boulevard was opened.
It may be possible to go north on Sixteenth Street to Kasser Road, then east to Tan Wood Road, then north to Dyer Lane, then east to Watt Avenue, then north to Base Line.
The East Side will be able to get to Watt Avenue by Elverta Road, U Street, Q Street and Elkhorn Boulevard.

STEELHEAD CREEK WATERSHED (formerly called NEMDC watershed)
The size is approximately 17,366 acres or 27.13 square miles.
Map: http://riolinda.info/watershed.html

The Steelhead Creek Watershed (formerly Natomas East Main Drainage Canal, NEMDC) in the Rio Linda and Elverta area is as follows:

The eastern boundary at the Sacramento/Placer County line starts about 2,600 feet west of Watt Avenue and continues in a south western direction, crossing:

Elverta Road just east of Bellingrath Drive,
U Street just west of Sixteenth Street,
Q Street just west of Dry Creek Road,
M Street about Seventh Avenue,
Elkhorn Boulevard just east of West Second Street,
Ascot Avenue (City Limits) between West Fourth and West Sixth Streets.

The western boundary at the Sacramento/Sutter County line starts at the western levee of Steelhead Creek (NEMDC) and continues south-southeast, following the levee to the Sacramento City limits at Ascot Avenue.

LOCATIONS WITHIN THE STEELHEAD CREEK WATERSHED

Tributary F

El Modena Avenue and Antelope Street may flood and be closed.
Elwyn Avenue south of Artesia Avenue may flood and be closed.
Rio Linda Boulevard and Sorrento Road may flood and be closed.
Rio Linda Boulevard north of Aldea Drive may flood and be closed.
Sorrento Road, about 2,350 feet north of Elverta Road will flood and be closed.

Tributary G

Sorrento Road, about 950 feet north of Elverta Road will flood and be closed.
Elverta Road and Ninth Street may flood and be closed
El Verano Avenue may flood and be closed north of Elverta Road
El Modena Avenue may flood and be closed north of Elverta Road
Rio Linda Boulevard may flood and be closed north of Elverta Road

Tributary I
Between Q and U Streets the following streets may flood and be closed:

Tenth Street
Eightth Street
Sixth Street
Rio Linda Boulevard
Second Street
West Second Street
West Fourth Street
Q Street west of West Fourth Street
West Sixth Street
Marysville Road north and south of Q Street
Straugh Road

Unnamed Tributary at M Street

M Street west of Marysville Road may flood and be closed
West Sixth Street may flood and be closed north and south of M Street

Unnamed Tributary at E Street

West Sixth Street may flood and be closed between Elkhorn Bl and Ascot Ave

RIO LINDA CREEK WATERSHED (formerly called Robla Creek)
The size is approximately 4,408 acres or 6.9 square miles.
Map: http://riolinda.info/watershed.html

The Rio Linda Creek Watershed in the Rio Linda and Elverta area is as follows:

The western boundary starts about halfway between Elkhorn Boulevard and Q Street at Twentieth-Eight Street and follows a generally south western direction, crossing:

Twentieth-Fourth Street near Q Street,
Elkhorn Boulevard to the south just west of Twentieth Street,
Elkhorn Boulevard to the north just west of Sixteenth Street,
Elkhorn Boulevard to the south just east of Dry Creek Road,
G Street just west of Tenth Street,
E Street near Tenth Street,
Ascot Avenue (City Limits) about halfway between Rio Linda Boulevard and the Northern Bike Trail

The eastern boundary starts just east of Twentieth-Sixth Street and just south of I Street and follows a generally west south-west direction, crossing:

E Street east of Twentieth-Sixth Street,
Twentieth-Fourth Street south of E Street,
Twentieth at Ascot Avenue,
Sixteenth Street just north of Ascot Avenue,
Dry Creek Road between Ascot Avenue and C Street,
Ascot Avenue (City Limits) between Dry Creek Road and the Northern Bike Trail.

LOCATIONS WITHIN THE RIO LINDA CREEK WATERSHED

E Street may flood and be closed east and west of Sixteenth Street
Sixteenth Street may flood and be closed between C and G Streets
C Street may flood and be closed between Dry Creek Road and Sixteenth Street
E Street may flood and be closed from Twenty-second to Twenty-forth Streets
Twenty-sixth Street may flood and be closed south of I Street

Local flooding during heavy downpours
Sixth and N Street