Heavy rain forces runoff failure at SB

By BRIAN GRAVES

Posted 10/18/17

The Industrial Development Board was briefed Tuesday morning on what was termed a "stormwater failure" on the Spring Branch Industrial Park site.Cleveland/Bradley Chamber of Commerce Vice President …

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Heavy rain forces runoff failure at SB

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The Industrial Development Board was briefed Tuesday morning on what was termed a "stormwater failure" on the Spring Branch Industrial Park site.

Cleveland/Bradley Chamber of Commerce Vice President of Economic Development Doug Berry said when the remnants of Hurricane Irma came through, the area received a record three inches of rain on that Sunday.



Berry said one of the slop drains disappeared "and they still haven't found it."

"Essentially, everything that was draining off of the area came down, filled up a retention pond and sediment pond, got into the roadway, got into the ditch and came down through where they had just finished a fill section for the installation of pipe," he said.

He said the soil was not fully covered because two days prior to the storm, the construction crews were still digging trenches and installing pipes.

Berry said the project includes  suspended solids monitoring — a way to gage the amount of discharge into the water — which happens 24 hours after a storm event.

"Flowing into the project site, the total suspended solids on Oct. 8 was 45.26 parts per million," he said. "When it got to the middle of the site, it was 52 parts per million. When it left the site, it was at 71 parts per million. Before it entered into Brymer Creek, it was at 69 parts per million."

He said upstream from Brymer Creek, the readings were 8 parts per million. Downstream of where Spring Branch enters in, the readings showed 11.61 parts per million.

"We were a contributor to the sediment discharge on that particular event, but not the sole contributor into Spring Branch," Berry said.

He added that Brymer Creek is still in "good shape."

"We take great care to do all that we can to minimize any impacts, but none of our storm water measures were designed for the storm event we experienced that week," Berry said."

He said the area experienced an inch of rain Sunday and "everything held fairly well."

"We still have a little issue with a charge, which is draining down and going below a culvert," Berry said. "That will end when we finish road construction because we will actually be building an elevated section and this drainage will be caught in detention we are getting ready to improve and build."

Berry said trying to manage the budget and buy equipment you might not need "in this case bit us."

"From now on, we will be stockpiling some rip-wrap and  some emergency materials for us to use for erosion control measures," he said.

Berry said the project team has been in communication with both the city and the state concerning the storm event.

"In summary, we experienced an unusual event for this time of year at the worst time — right as we were beginning to install three drainage crossings and bring our road to finished grades and permanent slope stabilization," he said. 


Inset Quote:

"All of our stormwater measures were blown out and failed. We had one heck of a stormwater management system failure as a result of that storm." — Doug Berry

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