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OFFICIAL WEB SITE OF THE CITY OF HARRISBURG
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Know Your Area’s Flood Risks
The flood zone map is downloadable from this Website. Using the magnifying glass tool you may "zoom" to a level that shows properties and street addresses, to determine if you live in or near a floodplain, where flooding is more likely to occur.

Click here for Flood Zone Map!

You may also check with the Bureau of Codes 717-255-6553 or Bureau of Planning 717-255-6419.

If you live in an area which could flood, be prepared:
• Buy flood insurance from any licensed insurance agent

• Learn the safest route from your home or business to safe, high ground if you should have to evacuate in a hurry.

• Keep a portable radio, flashlights, extra batteries, first aid kit, canned food and bottled water on hand.

• Keep your insurance policies, important documents, and valuables in a safe place, such as deposit box in a bank.

Please also see information about FEMA Flood Mapping below.

FEMA Flood Mapping
As of November 2009, FEMA has issued new DRAFT Flood Insurance Rate Maps (FIRM) for Dauphin County, including the City of Harrisburg. At this time, the Bureau of Planning is reviewing the maps to discern differences with the current maps dating back to 1977.

For more information on this update process, download the Flood Hazard Mapping Fact Sheet. Click here for Fact Sheet. . .

Construction and Improvements in the Floodplain
Harrisburg’s floodplain zoning regulations require that any construction in the floodplain be certified by an architect or engineer to be resistant to a 100-year flood. A public hearing must be held, and the Zoning Hearing Board must grant approval before any permits are obtained.

Flood along the Susquehanna

The Flood Protection Library
More detailed information is available in a four-binder Flood Protection Library at all City library branches and in the City’s Department of Building and Housing Development.


FLOOD EDUCATION INFORMATION
Flood Safety Program

Flood along the SusquehannaThe City of Harrisburg is a participant in the Community Rating System of the National Flood Insurance Program. Due to the City’s efforts, property owners/residents in the Special Flood Hazard Area (also known as the 100-year floodplain) realize a 20% reduction in flood insurance rates. Property owners/residents in other parts of the City realize a 10% reduction.

As part of the CRS program, we provide a number of brochures with information in preparing for and cleaning up after a flood. Please download any for additional information. If you still need answers, please contact the Bureau of Planning at 717-255-6419 or the Bureau of Codes at 717-255-6553.

Flood along the Susquehanna Harrisburg’s Flood Hazards
The Susquehanna River and the Paxton and Spring Creeks have the potential for flooding. But remember, FLOODS CAN HAPPEN ANYTIME AND ANY PLACE. Torrential downpours can cause dangerous flash flooding anywhere (including outside a floodplain). Be prepared!

Buy Flood Insurance
You may do so from any licensed insurance agent. Flood insurance through the National Flood Insurance Program provides coverage not found in homeowners policies. As a result of the City’s highly-rated Flood Protection Program, there is a 20% discount on flood insurance premiums for properties in Harrisburg’s Special Flood Hazard Area and a 10% discount for non-SFHA properties.
There is a 30 day waiting period for the policy to become effective so don’t wait until a flood to apply!

The Flood Warning System
The Susquehanna River rises slowly, providing at least 24 hours notice of an impending flood. Local TV and radio stations will provide information:
• A Flood Watch means a flood may happen. Be alert. Listen to the radio and television. Take action to reduce damage. The City will hand-deliver written notices with the estimated flood severity and time to all properties in the floodplain.
• A Flood Warning means the flood is about to occur or has already happened nearby. There is little or no time left before you will be affected. If, and only if, time permits, turn off the electricity at the main box and your gas at the meter if your home is likely to be flooded. But do not enter a flooded basement! Evacuate promptly if told to do so.
National Weather Service: You may also track Susquehanna River elevations on the NWS site. The site indicates levels from the past hours, with 24-hour projections. Click to Track River Elevations. . .

The Paxton Creek can rise quickly ("flash flood"). Gauges installed along the Paxton Creek transmit data on stream height and rainfall to a satellite, which relays information to a computer that sounds alarms in the City’s Communication Center, and at Dauphin County and the Pennsylvania Emergency Management Agency. An automatic calling system phones all businesses and property owners to warn of a flood along the Paxton Creek. All calls are made within eight minutes.

Protect Your Home Against Flood Damage
There are low cost ways to retrofit or protect your structure to reduce flood damage, such as installing check valves to prevent sewer back-up, sealing basement windows, or creating berms or floodwalls on your property. These and other techniques of floodproofing are summarized in the publication "Five Ways to Floodproof." Technical assistance can also be arranged with the Assistant Codes Administrator at 717-255-6553.

Preventing Flooding by Maintaining Drainage Systems
You can take actions to decrease the likelihood of street flooding and water seeping into your property through maintenance of storm inlets and your home’s drainage system. Here’s how:
1. Keep the area around storm inlets free from debris and rake up leaves so that water can enter the sewer and not accumulate on the street. Report any slow draining storm inlets to the Public Works Department, 717-236-4802.

2. If you see someone dumping debris, motor oil, or chemicals in storm inlets, report it immediately. Call 717-255-3131 so that police can arrest violators in the act. If the person has left the scene, call 717-255-3018 and give a description of the person or a description of their vehicle and license plate number. You could receive a $200 reward if the person is convicted.

3. Inspect your home’s rain gutters and downspouts regularly. Clean leaves out of gutters and check for leaks. Make sure the bottom of the downspout carries water several feet from your foundation. If gutters or spouts are clogged or missing, rain may leak in ceilings and seep into the basement, causing damage.






Return to top. . .

Helpful Flood Links

Flood Safety Tips
1. DO NOT Walk Through Flowing Water! 6 inches of water can knock you off your feet. Most drowning occurs during flash floods. Use a pole or stick to make sure the ground is still there before you go through water that is not flowing.

2. DO NOT Drive through a Flooded Area! More people drown in their cars than anywhere else. Flood waters covering roads or bridges have more power than you think. They can easily float and carry a car away. Police barricades are there for your protection. DO NOT DRIVE AROUND THE BARRICADES!

3. Stay Away from Power Lines and Electrical Wires! Electrocution is also a major killer in floods. Electric current can travel through water. Report downed power lines to your utility company or Harrisburg’s Emergency Management Agency.

4. For additional tips on flood safety and reducing loss and damage in a flood, contact the Department of Building and Housing Development’s Bureau of Codes at 717-255-6553.

For more tips see the "Flood Safety Tips" Brochure. Click here fro Flood Safety Tips. . .

HARRISBURG FLOODS
(Susquehanna River)
DATE FEET*
10/05/1786 22.00
03/15/1846 22.00
03/18/1865 24.60
03/19/1868 20.00
01/06/1886 19.00
02/00/1886 20.20**
06/02/1889 26.80
02/19/1891 19.70
05/22/1894 25.70
03/03/1902 22.40**
03/08/1904 20.20**
03/28/1913 19.54
03/30/1914 18.10
03/29/1916 18.80
03/13/1920 20.20
02/13/1925 18.80
03/19/1936 29.32
04/02/1940 19.75
01/01/1943 19.40
05/29/1946 21.80
11/27/1950 19.34
04/02/1960 18.20
02/27/1961 18.48
06/24/1972 32.57
09/27/1975 23.82
01/20/1996 25.08
01/21/1996 24.68
09/20/2004 24.40
04/04/2005 18.80
06/29/2006 19.66

*Flooding begins above 17 ft.
**Backwater from Ice Jam

Natural and Beneficial Function of the Local Floodplains
The City of Harrisburg and upstream municipalities have enacted regulations for the Paxton Creek and Spring Creek watershed. These regulations are designed to prevent any increase in runoff from development reaching these streams. This will help preserve the natural and beneficial functions of these streams, floodplains and surrounding land.

In Harrisburg, large areas of the floodplain are protected by Open Space zoning and public ownership (City Island, Wildwood Lake, Riverfront Park, and Italian Lake). These areas are there for all to enjoy. Further, the trees absorb carbon-dioxide and generate healthful oxygen. The roots of the trees and grass prevent soil erosion. Open land acts like a sponge taking in rainwater, filtering it, then recycling it through action of the sun. Several local groups work to preserve the green spaces including those in the floodplain, including Harrisburg Parks Partnership; Capital Area Greenbelt Association, Inc.; and Dauphin County Parks and Recreation’s Friends of the Wildwood.

Click for Harrisburg, Pennsylvania Forecast

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THE CITY OF HARRISBURG • MAYOR LINDA D. THOMPSON
HARRISBURG CITY COUNCIL

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Revised Tue, Dec 28, 2010