Location: Seattle, WA
Owner: Seattle Parks and Recreation
The Golden Gardens Drainage and Stairway Renovation project replaced popular yet unsafe and failing stairs with a new ADA-complaint 6 ft. wide concrete stairway in Golden Gardens Park, located along the Puget Sound in Ballard. Developed in the early 20th century, the park has since become a Seattle landmark, known for its historic stairway connecting the beach to an off-leash dog park and neighborhoods.
The previous drainage system under the steep, non-ADA compliant stairway consisted of a stacked-concrete slab channel, which turned into an open concrete channel adjacent to the lower stairs. This drainage system supported storm flows and a steady base flow year around and was leaking due to gaps between the stacked-concrete slabs, allowing groundwater to wash the fine sand out from beneath the existing steps, causing the steps to unevenly settle and crack. This failure of the stairs and drainage infrastructure created serious safety concerns for park visitors who used the stairs.
The improved closed drainage and underdrain system captures and redirects surface and subsurface flows to reduce subgrade settling and re-occurrence of erosion problems which had caused the original failure. The cracks were sealed in the lower open channel, popular with visiting school groups and children.
Prior to Improvements After Improvements




Service Details >>
- Capital Improvement Planning and Implementation
- Comprehensive Planning
- Hydrologic and Hydraulic Modeling
- Stormwater Utility Development
- Stormwater Code Review and Update
- NPDES MS4 Mock Audits
- Surface Water Manual Development and Updates
- Floodplain Analysis and Mapping
- Watershed and Basin Modeling and Planning
- Site Plan Development
- Training Development and Classroom Instruction
- Storm and Surface Water System Pipeline Design
- Flood Reduction


Since receiving her PhD in Civil & Environmental Engineering, Maria has been working on a variety of water resources projects. Her experience includes modeling of groundwater flow and contaminant transport, stormwater hydrologic and hydraulic modeling, runoff calculations, conveyance sizing, flow control and treatment facility design, and TESC design and Stormwater Pollution Prevention Plans (SWPPP). She is familiar with the Ecology Stormwater Management Manual for Western Washington and the WSDOT Hydraulics and Highway Runoff Manuals. Maria has knowledge in use of FEFLOW, MGSFlood, WWHM, HEC-RAS, MicroStation and InRoads Suite, Civil3D, GeoStudio Suite, and ArcGIS.
Joined OCI: 2019
Education: PhD Civil & Environmental Engineering, University of Vermont; MEng & BSc Environmental Engineering, Technical University of Crete, Greece
Licenses and Certifications: Engineer in Training (EIT), Certified Erosion and Sediment Control Lead (CESCL), 2019 WSDOT Highway Runoff Manual (HRM) Trained
HOBBIES & INTERESTS
Maria enjoys spending time with her husband and two cats, baking, taking wildlife pictures, and hiking in the mountains. Whenever she gets the chance, she also loves visiting her family in Greece.