- Email: CEMVR-HydroSurveyWeb@usace.army.mil
- Normal business hours are 7:30 - 4:00 pm (CST) Monday through Friday
- Information Assistance: 309-794-5505
- Fax: 309-794-5180
- Mailing Address:
USACE - Rock Island
ATTN: OD-T
Clock Tower Bldg.
PO Box 2004
Rock Island, IL 61204-2004