Construction Engineers in Barnhart, MO Northwind Engineering1705 Marriott LnBarnhart, MO, 630126362230277ApacConstruction CompaniesContractors RemodelingEngineering FirmsGeneral ContractorsProfessional EngineersProfessional Onsite Engineering InstallationSeptic EngineerB M Bennett Construction & Daughters6544 Haven Hill RdBarnhart, MO, 630126364643032Construction CompaniesSeptic EngineerSeptic PumpingSeptic ServicesSeptic Tank CleaningSeptic Tanks SystemsShow MoreSee AlsoGeneral Contractor EngineersInspecting Engineers