The Indian Creek PL-566 Watershed project area includes 4,700 acres located north of Council Bluffs city limits in Western Iowa. Indian Creek Site 2 was constructed in 1975 with a low hazard rating to control grade and reduce sediment loading downstream. Site 2 formed an initial total sediment pool of 29 acres in two adjacent gullies. Water is allowed to flow between the two pool areas through six culverts in the upstream berm area and beneath a private access road. The structure has been

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... d and reclassified as high hazard in April 2004 once a detailed study showed seven residences and one business in the breach inundation area. The rehabilitation action is being planned and will be implemented under the Watershed Protection and Flood Prevention Act PL 83-566 as amended by PL 106-472. In addition, it is being planned and is in compliance with the National Environmental Policy Act (NEPA) and the National Historic Preservation Act of 1966 as amended (NHPA) provisions. The alternative chosen to rehabilitate the dam to meet high hazard class criteria includes raising the top of dam three feet and adding new vegetated auxiliary spillway. This will give the structure a new 50-year design life.