Drexel, Barrell & Co.

Comprehensive geomatics, boundary analysis, and high-precision mapping support for property transactions, site design, and construction tracking.

• Boundary and ALTA Surveys
• Topographic and Design Surveys
• Annexation and Zoning Maps
• Subdivision and Condominium Plats
• Right-of-Way Mapping and Exhibits
• Building Height and Floodplain Certification Surveys
• Construction Staking
• As-Constructed / As-Built Surveys
• Building Settlement Monitoring
• Bathymetric Surveys

Site layout, utility integration, grading, and construction assistance to prepare sites for public and private developments.

• Pedestrian, Bicycle, and Vehicular Circulation Design
• Horizontal Control Plans
• Grading and Drainage Plans
• Utility Plan and Summary Design
• Detention Pond and Storm Channel Design
• Drainage Studies
• Construction Cost Estimating and Bidding Assistance
• Construction Inspection and Closeout

Hydrologic modeling, floodplain analysis, and utility infrastructure design to manage stormwater, wastewater, and potable water distribution.

• Drainage Basin Hydrology and Planning
• Regional Detention Pond Planning and Design
• FEMA Floodplain Modeling and LOMR/CLOMR
• Reservoir and Dam Design and Rehabilitation
• Bridge and Culvert Hydraulics
• Storm Sewer Outfall and Water Quality Design
• Pump Station and Force Main Design
• Water Distribution Network Hydraulic Modeling
• Large Diameter Pipeline Design
• Zero-Rise Analyses

Planning and design of streets, highways, active transit corridors, traffic control systems, and agency permitting.

• Traffic Impact Studies
• Street and Highway Design
• Hazard Elimination Safety (HES) Design
• Safe Routes to School Design
• Intersection, Traffic Signal, and Roundabout Design
• Signalized Pedestrian Crossings
• Pedestrian and Bicycle Trails
• Vehicle and Pedestrian Bridge Design
• CDOT Highway Access Permit Processing
• Tunneling and Boring Design and Approvals
• Signing, Striping, and Pavement Marking Plans