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Board grants conditional approval for Timberbrook Estates; approves petitions affecting Fred Hafner Ditch
Summary
The Tippecanoe County Drainage Board gave conditional final approval to Timberbrook Estates, discussed an oversized Oasis detention pond to reduce runoff, and approved petitions to reduce and permit encroachment on the No. 34 Fred Hafner regulated ditch.
The Tippecanoe County Drainage Board granted conditional final approval for Timberbrook Estates, a roughly 48-acre residential subdivision planned for the south side of County Road 600 North, and approved two related petitions concerning the No. 34 Fred Hafner regulated ditch.
Pat Williams of T Bird Design described the site and its drainage complexities. Timberbrook Estates is proposed as about 39 residential lots. The Fred Hafner regulated drain and an unnamed tributary to Colt Ditch bisect the property; the west portion will route runoff to a Timberbrook Meadows pond that will be enlarged to receive flow. The design includes an oversized Oasis detention pond intended to reduce overall runoff: Williams said the pond will store about 10 acre-feet and that, for certain short-duration storms, some uncontrolled runoff from about 11.5 acres still exceeds allowable release rates, but for larger events the proposed system will reduce flow by more than half. Williams said the design meets the spirit and criteria of the county's stormwater ordinance and requested conditional final approval.
Commissioner Brown asked about two residential properties to the north, owned by Webster and Abbott, that historically have had localized ponding. Williams and staff said the project reduces the area draining to those properties (estimating reduction to about 1.5 to 2 acres from a larger historical area) and that the proposed road crossings were designed so the 100-year water surface elevation at the north property line would not be raised. Staff noted the design includes finished-floor elevations set at least 1 foot above the flood protection grade for upstream structures.
The board voted to grant conditional approval per the BERC memo dated 05/01/2025. The board also approved a petition to reduce No. 34 of the Fred Hafner Ditch and a petition to allow encroachment on the same ditch. Staff said the developer intends to return with a petition to create a regulated drain, likely in June or July, which will be considered separately.
