Gahanna is moving forward with plans to build a detention basin near Giant Eagle and the Woods at Shagbark while continuing to explore additional ways to help control erosion and flooding along the McKenna Creek watershed.

Gahanna is moving forward with plans to build a detention basin near Giant Eagle and the Woods at Shagbark while continuing to explore additional ways to help control erosion and flooding along the McKenna Creek watershed.

City engineer Karl Wetherholt reported to council July 25 that Gahanna has scheduled an Aug. 4 meeting with Columbus officials to discuss stormwater management in the Columbus jurisdiction north of Morse Road.

"I think we'll get something to come through eventually," he said. "Columbus has some stormwater utility credits available in some of these areas. We'll see what businesses can do. Our basin gets us forward for where we want to be but not all the way there."

The proposed $400,000 detention basin is the most time-efficient and cost-effective solution on city-owned property, according to Dottie Franey, city service director.

In addition to the basin, which would be funded through the city's stormwater utility fund, Gahanna will continue to research additional storage areas north of the basin.

In the Aug. 4 meeting, Gahanna is expected to ask if Columbus would be willing to participate in refining McKenna Creek (known as Beem Ditch) watershed drainage studies already started by Gahanna for areas within Columbus' jurisdiction.

By helping to refine McKenna Creek watershed drainage studies, Gahanna specifically is looking for Columbus to supply the stormwater calculations provided by the private businesses along the watershed at the time of their development.

Gahanna also wants to know if Columbus would be willing to offer stormwater utility credits to private businesses within the watershed for improving stormwater management. If Columbus already has such credits available, Gahanna wants to know criteria to qualify for those credits.

Columbus officials also will be asked if they would agree to let Gahanna consult with private businesses within Columbus' jurisdiction regarding stormwater management. If that's agreeable, Gahanna would involve Columbus in such a correspondence.

Gahanna officials also want to know whether Columbus requires stormwater management be upgraded when other significant improvements are made to an existing development. Understanding that existing structures along the watershed were developed under different regulations, Gahanna also wants to know if Columbus has strengthened stormwater management requirements for future development.

Wetherholt said he also spoke to Dan Mecklenburg, of the Ohio Department of Natural Resources, as well as the original designer of the Market at Hamilton.

Citing various constraints, he said the option for additional stormwater management at the Market at Hamilton wasn't conducive at that site.

Deputy service director Mike Andrako said the new detention-basin project is being advertised, with bids being accepted until Aug. 5.