| MAPLE PARK LUTHERAN CHURCH Lynnwood, WA |
| The Maple Park Lutheran Church project is a sanctuary addition to the existing church building. CG Engineering completed the civil engineering site drainage design; grading and site improvement plans with associated parking. The extensive civil site design was required for protection of Category 1 wetlands and a Type 3 stream tributary to Swamp Creek. Storm water facilities were designed to protect the integrity of the downstream land, specifically the wetlands. More restrictive design methods were required such as discharging the 7,000 CF combined detention/water quality tank at a controlled release rate per Department of Ecology standards. An infiltration trench was designed to accommodate the roof runoff from the church. A storm filter system was designed for water quality treatment of pavement areas subject to pollutants. |
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