List of Contributions

You raise a good question. And what about urban areas which may have large undeveloped upstream areas for which plats have not been filed? The Urban areas in Texas are developing very quickly. Unless the policy has changed, the flood zone maps don't reflect runoff for the fully developed condition. Are ...

There isn't any magical empirical formula. There are so many variables. You should try to get hydrograph information if it is available. For large watersheds the Kirpich Equation works well. You can then adjust the result for the type of surface in the watershed. Double for overland flow on grassed surfaces, ...

Some sewage systems are subject to infiltration during rain events. Make sure your inflow data takes due account of this. ------------------------------ James Anderson, MASCE Principal Anderson Consulting North Richland Hills, TX 817-946-9943 James ------------------------------

Haven't run into this situation but it sounds like the perfect fit for a stormwater detention tank at ground level perhaps with a septic tank on the outlet end or built in to the detention tank. The septic part could be connected to the Sanitary Sewer system. ------------------------------ James ...

The City of Fort Worth, TX faced a similar decision during the early 1980's. A record freeze and more than 7,000 line breaks during the Christmas holidays made the decision an easy one. Ductile Iron and PVC became the new standard. As streets were scheduled for reconstruction, the water lines were replaced. ...