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Council conditions Lost River 8th approval on signed engineer opinion and map
Summary
After receiving an expert presentation and a caution letter from a water‑resource authority, Horace City Council agreed to rescind a Planning Commission plat condition contingent on the developer providing a signed engineer opinion and a plat supplement showing the building control line measured from the high‑water bank.
The Horace City Council voted May 18 to rescind a Planning Commission condition on the Lost River 8th plat, contingent on the developer delivering two items: a signed engineering opinion from the consultant who spoke at the meeting and a supplemental plat view showing the building control line measured from the high‑water bank.
The decision followed a technical presentation and public comment by Ezra Ballinger, a principal engineer with Braun and Air Tech Corporation, who reviewed the 2016 geotechnical report by Northern Technologies and told the council the report’s recommended setbacks “appear to have been carried into the preliminary plat” and that, in his opinion, the Southeast Cass Water Resource District’s concerns were “adequately addressed” in that analysis. Ballinger spoke during public comment and described the geotechnical evaluation as using a conservative factor‑of‑safety approach.
City staff and the council reviewed an email from AET, the successor firm to NTI, which said AET would “need to perform our own stability analysis to issue a review letter,” and would not validate another firm’s work without additional borings and testing. City Attorney counsel read the correspondence into the record and council members said that raised liability concerns if the city were to waive the condition without further documentation.
Council members debated options including asking for a full new slope‑stability report (estimated in prior years at about $42,500) or accepting a signed acknowledgment from a technical expert. After extended discussion on how the building control line (BCL) was calculated — the 2016 report measured from the river channel centerline while the city ordinance uses the top of bank — the council asked the developer to provide a one‑page supplemental plat image showing the BCL referenced to the upper bank and a signed, credentialed letter from the engineer summarizing his opinion. The motion to rescind the condition subject to those deliverables was moved and seconded and carried on a voice vote.
Council staff said the city’s long‑standing development agreement adopts the NTI report and a BCL tied to that report, but noted the city has an obligation to confirm public‑safety implications raised by third‑party authorities. City staff and the developer agreed the requested supplemental map and a stamped letter would allow the council to proceed without commissioning a time‑consuming and costly full study.
Next steps: the council’s action removes the Planning Commission condition contingent on the developer promptly submitting the signed engineer opinion and the plat supplement for staff review and, if acceptable, for final administrative processing.
(Reporting note: the council’s motion as recorded on the official minutes requires the developer to provide the signed letter and the supplemental plat before the condition is considered rescinded.)
