Donald Hemphill
P.E. · Civil Engineering
Irving, TXCivil Engineering
Land Development
Subdivision and Site Development
Drainage Systems and Flood Prevention
Stormwater Management
FEMA FIRM/LOMR
NPDES SWPPP
Water Distribution and Wastewater Collection
Water/Wastewater Treatment Facilities
Earthwork and Grading
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Detention/Retention Pond Design
Roadway Design
ADA Site Requirements
Traffic Control and MUTCD
Construction Inspection and Commissioning
Project and Program Management
Cost Estimating and Value Engineering
Delay Claims and Change Order Analysis
Permitting and Entitlements
Pedestrian Safety
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