Welcome

IDF Curve Lookup is a web-based application provided by the Ontario Ministry of Transportation (MTO) for the purpose of retrieving Intensity-Duration-Frequency (IDF) curves. You must agree to the Terms of Use before using IDF Curve Lookup. You should also be aware of the the Browser Requirements of the application.

Terms of Use

The information provided by this website is for the sole purposes of identification of precipitation information to be used for drainage management by the Ministry of Transportation (MTO) in respect of MTO projects.

Disclaimer

MTO has created the information provided by this website with the assistance of the University of Waterloo to assist MTO staff and consultants working on MTO projects, who may wish to use the information for drainage management purposes. The information provided by this website was developed for MTO projects by both the University of Waterloo and MTO and the information employs Intensity-Duration-Frequency (IDF) curves.

In the event that other persons should choose to make use of the information provided by this website, they shall do so at their sole risk. MTO and the University of Waterloo do not claim, warrant or guarantee that the information provided by this website is complete, correct or free from errors or fit for any particular purpose and MTO and the University of Waterloo expressly do not assume any responsibility or liability and further disclaim any liability for any costs, expenses, harm or loss suffered by any person for any reason whatsoever, which may result, directly or indirectly, from any use of or reliance upon the information provided by this website.

Google™ Maps

Google Maps information and photographic imagery are used under license by Google. The map information and photographic imagery contain trade names, trademarks, service marks, logos, domain names, and other distinctive brand features. This does not imply an endorsement of Google, Google Maps, or Google Earth products or services by the Ministry of Transportation of Ontario.

Browser Requirements

JavaScript must be enabled to use the features of this site.

IDF Curve Lookup works with most modern browsers, however certain features require these or more recent versions of these browsers:

Limitations have been observed with older browsers, such as Mozilla Firefox 1 and Netscape Navigator 8.