The National Park Service is conducting a market survey for potential work at Zion National Park, involving heavy civil engineering such as partial dam removal, river regrading, and new intake structure construction. The anticipated budget for the project is between $1 million and $5 million. The performance location is Zion National Park. This is a sources sought notice to gauge contractor interest and capability, not a formal solicitation. Interested small business contractors must be registered under NAICS code 237990 in SAM.