Soil and water district says proposed IDEM MS4 changes should have limited impact on Columbia City

John, a representative of the Wytheville County Soil and Water Conservation District, reported to the Columbia City Council on the district’s annual MS4 activities and told the council that Indiana Department of Environmental Management (IDEM) is likely to move toward a tiered MS4 general permit that would place Columbia City in the lowest tier. “Based on Columbia City's population, we would be in the lowest tier,” John said, adding that the change “really won't have much impact on the things that we're required to do.”

The MS4 report covered several program elements required under the permit, including public education, discharge detection and elimination, and municipal operations. John said IDEM plans to reduce the frequency or scope of some requirements—for example, exempting routine inspections of wastewater and major treatment facilities from the municipality’s inspection list and scaling back an annual water‑quality characterization report while keeping targeted water‑quality monitoring in place.

Why it matters: councilors and staff will need to watch forthcoming permit language because it could prompt local adjustments to development regulations. John said the MS4 changes may include a review of development rules to remove barriers to green infrastructure and low‑impact development, a step that could affect future site plans and stormwater design standards.

John highlighted recent local results: the city’s combined‑sewer‑overflow project has been followed by substantially lower E. coli readings, and the district plans monitoring in May to update the data. “I’m anxious to see this year's results,” he said. He also told the council the district removed large amounts of street debris through municipal operations: “We removed 293,000 pounds of debris from the streets,” a practice the district said reduces pollution entering sewers and receiving waters.

The district reported it was audited by IDEM on MS4 components other than construction. John said the audit found a few minor deficiencies that staff corrected; one cited item was that the city’s stormwater ordinances had been updated late, which the speaker said has been addressed. He encouraged continued use of technical assistance and training opportunities for staff and volunteers.

Councilors asked about local riverbanks after the presentation. John described annual walks of portions of the Blue River and Phillips Ditch to inspect outfalls and noted isolated sloughing and small slides on sandy banks; he said major bank stabilization has been done by other communities after receiving state grants but that Columbia City currently has no watershed group coordinating such projects.

Next steps: staff and the district will continue water‑quality monitoring in May, and the council may be asked to review development regulations if the final IDEM permit requires new local actions.