According to the Watershed Protection Ordinance introduced in October 2013, if a development permit application proposes new construction or addition which falls within 100 feet of the centerline a waterways having drainage area of 64 acres or greater, within 100 feet of the ordinary high water mark of the Colorado river downstream from Longhorn Dam, or in a location with significant existing erosion, the City of Austin Watershed Protection Department requires the applicant to present a Erosion Hazard Zone Analysis report showing the extent of the potential future erosion.
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If you are thinking of new development or an addition to your existing development which meets any of the criteria listed above, we encourage you to contact Servant Engineering & Consulting, PLLC today to help you make your project a success.
Source: Appendix E of City of Austin Drainage Criteria Manual
We can help you with the level 1 Erosion Hazard Zone Analysis