It is important for residents and business owners in flood prone areas to monitor local television and radio for flood updates in order to have time to take protective measures with their property. The City of Clive does not notify individual property owners during minor flooding events.
Walnut Creek is known for flash flooding. Flash flooding is a term used for small streams and creeks that are susceptible to quick rises in stream levels. As quick as these water levels reach their peak (crest) they begin to recede. Walnut Creek reaches from Clive northwest to Dallas Center and stretches out between Grimes and Waukee. This is approximately 10 miles between Dallas Center and I –35/80. It is important to understand that only heavy rains within the Walnut Creek watershed will have an impact on flooding within the City. Take this opportunity to view the Walnut Creek watershed map.
The City has Flood Response and Recovery Plans for Walnut Creek and North Walnut Creek, which outline the following steps, effective Feb. 2016.
In the event of a FLOOD WATCH...
A flood watch is issued when conditions are favorable for flooding. It does not mean flooding will occur, but it is possible. City staff will:
- Monitor Walnut Creek, the weather forecast, and area weather radar.
- If flooding is imminent, city management will be notified.
- Greenbelt Park will be monitored for possible closures.
- Maintain routine police patrols and notify appropriate staff if Walnut Creek is causing a concern of flooding.
In the event of a flood or flash FLOOD WARNING...
A flood or flash flood warning means flooding or flash flooding is now occurring or will occur soon in your area. It is possible to experience flash flooding in areas not immediately receiving rain. City staff will:
- Have a staff person available at the Public Works building or emergency operations center to answer phones.
- Barricade streets as needed.
- Distribute & coordinate sand, sandbags, and equipment to a sandbagging site on University Blvd.
- Distribute sand, sandbags, and equipment to a sandbagging site at Diamond Public Safety Center.
- Distribute sand, sandbags, and equipment to community sandbagging sites:
- Site 1: Lundberg Park, 1450 NW 78th St., if available, or 78th &University pumping station
- Site 2: 9997 University Ave (Nobbies), NE parking lot (near driveway on NW 100th St)
- Assist with sandbagging operations on University Blvd.
- Monitor North Walnut Creek.
- Provide evacuation points at
- Lundberg Park, 1450 NW 78th St.
- Indian Hills Junior High School, 9401 Indian Hills Dr.
If you are a homeowner or business owner in the City of Clive and you live or work within a flood prone area, pay close attention to heavy rain fall events within the watershed. Typical heavy rainfall events take place between May and June, but we have had major flood events in late winter and late summer. It is important you stay informed to the latest weather reports and information during wet weather periods. A NOAA weather radio will alarm you during the late evening and early morning. If you are at work, listen to the radio or access the NOAA Des Moines website for the latest watches and warnings.
Flooding can occur after prolonged rainfall over several days causing a river or stream to overflow and flood the surrounding area. Flash flooding can occur after intense rainfall of one inch or more an hour. Flash floods often give very little warning, developing in a few minutes or a few hours. A flash flood watch means flooding or flash flooding is possible in your area. Stay tuned to local television and radio for updates or advice. For the late evening and early morning hours, it is recommended that you purchase a NOAA weather radio, which automatically announces impending dangerous weather situations.