FREMONT (CBS SF) — Fremont police hope surveillance video will help them find three men suspected of vandalizing a dam, wasted millions of gallons of water in the process.

The newly-released surveillance footage shows the men entering a restricted area of Alameda Creek and intentionally damaging an inflatable dam.

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The dam is used in the Alameda County Water District’s operations to recharge the Niles Cone Groundwater Basin, one of the district’s main water supplies.

The damage sent an estimated 50 million gallons of water — enough to supply nearly 500 homes for one year — rushing down the creek. The dam will cost $3 million to replace.

Inflatable Dam Across Alameda Creek Before Its Destruction By Vandals In May 2015

Inflatable Dam Across Alameda Creek Before Its Destruction By Vandals In May 2015

Based on the surveillance images, the suspects are described as:

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Suspect #1: Adult male, medium build, short cropped hair, wearing long sleeved shirt, and unknown colored pants.

Suspect #2: Unknown aged subject, thin/medium build, wearing hooded sweatshirt with hood up, and unknown color pants.

Suspect #3: Unknown aged subject, thin/medium build, wearing light colored shirt and unknown color pants.

The district is offering a $10,000 reward for information leading to the arrest and conviction of the suspects responsible for this crime.

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Anyone with information about this crime is encouraged to contact Detective A. Ceniceros at 510.790.6664 or by email at aceniceros@fremont.gov. The public can also provide anonymous tips via Nixle.