401/404 Permitting

2D & 3D Hydraulic Modeling
Bio-stabilization & Restoration Design

401/404 Permitting


Various Culvert Replacements

M3 was part of the team for a project to replace three existing box culverts in St. Louis County: Villa Dorado Drive Culvert No. C-2-416 (11’h x 15’ w), Lackland Road Culvert No. C-2-116 (6’h x 12’w) and Lockwood Avenue Culvert No. C-4-224 (12’w x 8’h). M3 performed floodplain studies [...]

Maline Creek Bank Stabilization

M3 Engineering Group was retained by The Great Rivers Greenway District to design two miles of greenway trail and three pedestrian bridges along Maline Creek. The project included design of a rain garden and stream biostabilization design at three separate locations to ensure that the new bridges would be supported [...]

Gravois Creek Stream Stabilization

M3 performed a Geomorphic Assessment on 8 miles of Gravois Creek to determine the streambank stability adjacent to a proposed sanitary storage tank and several large diameter sanitary sewers. he stream was suffering from bank erosion that threatened exposed sewers. The effort began with using M3’s GIS Streambank Assessment tool [...]

Dougherty Lake Shoreline Protection

A lake owned by the St. Louis County Parks Department was suffering from shoreline erosion that was threatening the backyards of several residents adjacent to the lake. The residents reached out to the Parks Department, who then hired M3 to develop a solution. M3 found that, since the 1980’s, approximately [...]