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Texas Commission on Environmental Quality approved the rules associated with the Triennial Revision of 30 TAC Chapter 307, Texas Water Quality Standards on Aug. 23 to progress from a pending proposal status to a proposal. The rules have been published in the Texas Register for public comment, and comments are due by Oct. 17. There will be a public hearing on Oct. 16.

These proposed rule changes are a...

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URISA Texas will host “Creating and Using Custom Soils Databases Using ArcGIS Desktop” from noon to 1 p.m. Sept. 26.

Attendees will learn how to download large quantities of soil data, build gSSURGO databases for custom areas of interest and create soil maps for more than 160 soil properties using the Soil Data Development ArcToolbox, which was offered from the U.S. Department of Agriculture Natural Resources Conservation...

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Hurricane Harvey made landfall as a Category 4 storm the night of Aug. 25 between Port Aransas and Port O’Connor, Texas. As it moved across Texas, the storm proceeded to dump catastrophic amounts of rain. Please see below our exhibits, which illustrate the magnitude of rainfall that fell over the most intense 24 hours of the storm and a 3-day period (Aug. 26 through Aug. 28).

The Probable Maximum Precipitation (PMP) is the theoretically greatest depth of precipitation for a given duration that is physically possible over a given storm area at a particular geographic...

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The Texas Commission on Environmental Quality has provided additional clarification regarding electronic reporting requirements for submitting electronic discharge monitoring reports (DMRs) for stormwater from industrial facilities. Under the recently renewed Multi-Sector General Permit (MSGP) TXR050000, effective Dec. 21, 2016, all analytical results for determining compliance with effluent limitations are required to be submitted online using the...

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Freese and Nichols will attend and present at the Texas Floodplain Management Association (TFMA) Fall Technical Summit from Aug. 29 to Sept. 1 in San Antonio.

Catch one of our presentations or workshops:

Tuesday, Aug. 29

Workshop 3 – Introduction To HEC-RAS 2-D

Time: 8 a.m. to 5 p.m.

Instructors: Garrett Johnston, P.E., CFM (FNI); Patrick...

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Owners or engineers who have a project that is near, approaching or crossing a levee often ask, “Do I need a 408 permit?”

What Is the Section 408 Permit?

The Section 408 permit is a requirement for altering a U.S. Army Corps of Engineers (USACE) civil works project. We all generate questions...

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HEC-RAS version 5.0.3 includes several boundary condition types for 2D flow areas. Flow and stage hydrographs are typically used to input flows to the 2D area. The rating curve and normal depth boundary conditions are available where flow is leaving the 2D area. There is also a precipitation boundary condition, which can be used to apply time series of rainfall excesses to the 2D elements. This article focuses on the flow hydrograph boundary condition.

A flow hydrograph boundary condition is created by: (1) drawing a boundary condition line along the edge of the 2D area, (2)...

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The Division of Water Infrastructure in the North Carolina Department of Environmental Quality is hosting a series of training sessions throughout the state on applying for fall funding for your water infrastructure project.  

The division encourages anyone applying for water infrastructure funding to attend one of the sessions. The sessions will offer...

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