Solmar Hydro specializes in providing navigation and charting services to support marine commerce. All of our surveys meet and exceed USACE and National Ocean Service standards.


Thorough data collection and QA/QC procedures ensure critical underkeel clearance is reliably determined. Our charts include shoal-biased sounding selection with designated soundings which identify underwater hazards and ensure safe navigation.

critical underkeel clearance

dangers to navigation

marine infrastructure assessments

channel alignments

water depths

pre/post dredging surveys

permitting assistance

full coverage under slips

dredge permitting + support

underkeel clearance determination

shoal-biased soundings

designated soundings

confirmed navigational hazards


under bridge clearance determination


Solmar Hydro

Marine Engineering and Surveying

8940 N. Bradford St.
Portland, Oregon 97203

Tel: (206) 200-8269