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Engineer outlines repair and upgrade options for DD76; full upgrade estimated at about $320,000
Summary
An informational session on Drainage District 76 reviewed existing tile capacity, a sensitive fen at the outlet and three cost scenarios: basic repair (~$80,000), limited upsizing (~$87,000), and a full improvement (~$320,000). The board approved pre‑classification work to generate parcel‑level estimates.
At an informational session during the same meeting, the engineer reviewed Drainage District 76 — a roughly 334‑acre district originally constructed in 1927 — and presented three maps showing the existing system, drainage coefficients and a proposed improvement plan.
He told the board the downstream outlet includes a fen (a peat wetland) that complicates construction and increases the importance of minimizing disturbance. The engineer offered three cost paths: a focused repair estimated at about $80,000; a localized upsizing that would increase capacity at an estimated $87,000; and full improvements for the network shown that were estimated at roughly $320,000 (about $958 per acre on average). He recommended a pre‑classification assessment so landowners can see parcel‑level assessment projections for each option.
Board members and several written commenters urged exploring lower‑cost alternatives (open ditches, water retention on Fairchild property) and wetland‑based approaches to protect water quality. The Iowa Department of Natural Resources representative noted the fen’s ecological sensitivity and encouraged minimizing impacts.
The board approved moving forward with pre‑classification work and directed the engineer to prepare parcel‑specific maps and cost tables for options to be considered at a later formal hearing.
