Herrera Environmental Consultants Share: Civil EngineeringCivil General MunicipalCommunications/Tel ComComputer Applications/TechConstruction ManagementEnvironmental EngineeringHazardous WasteHydrology/HydrogeologyLand DevelopmentMiningPlanningSanitary EngineeringUtilities/EnergyWater/Wastewater Herrera Environmental Consultants Visit Website 2200 6th Ave Ste 1100 Seattle, WA 98121-1867 (206) 441-9080 (206) 441-9108 (fax) Map What's Nearby? Distance: 5 10 15 20 25 50 mi.