Water Resources and Stormwater Management.
Endesco, Inc. is a multi-discipline civil engineering design, consulting, and construction management firm founded in 1997 and headquartered in Rockville, Maryland. It specializes in water resources, transportation planning and traffic engineering, roadway and lighting design, environmental studies, GIS, and project and construction management, primarily serving state DOTs, transit authorities, counties, cities, and federal agencies across the Washington, DC/Baltimore metro region and beyond.
Montgomery County MD MFD · NAICS 541330 Engineering Services
Hydrologic and hydraulic analysis, stormwater management, drainage design, erosion and sediment control, scour analysis, and FEMA permitting for transportation and site development projects.
Full-spectrum traffic services including signal design, impact studies, simulation, safety analysis, parking consulting, transit studies, and airport landside traffic planning.
Field data collection using video, tubes, radars, microwaves, lasers, license plate readers, and FAA-licensed drones. Covers turning movements, volume/classification/speed counts, parking occupancy, and pedestrian/bicycle counts.
Roadway geometry, pavement evaluation and design, grading, site layout, access management, ADA compliance, and land development entitlement and permitting.
Photometric analysis, roadway lighting, sign lighting, parking lot and garage lighting, bridge navigation lighting, metro station lighting, and light trespass analysis.
CPM scheduling, forensic analysis, time impact analysis, claim analysis and negotiation, QA/QC, risk assessment, constructability review, and on-site staff augmentation for DOT agencies.
Noise monitoring and analysis, air quality analysis, environmental compliance, and agency coordination for transportation infrastructure projects.
Geospatial data capture, analysis, and management including topological and hydrological modeling, NPDES geo-database tracking, and performance dashboards.
Landside traffic operations analysis, master plan update support, parking occupancy and turnover studies, and access road improvements for commercial airports.
Data collection, analysis, and reporting support for agency transportation asset management programs including pavement, parking, and infrastructure inventories.
Government · Transportation · Transit · Airports · Rail · Commercial · Residential · Education
Northern Virginia · State DOTs · 2023 · Client: VDOT
P3 design-build project providing two express lanes alongside three regular lanes for nearly 23 miles of I-66 from I-495 to Route 29. Endesco provided drainage design, H&H analysis, erosion and sediment control, stormwater management, traffic engineering (signals, pavement marking, signing), and GIS.
Montgomery and Prince George's Counties, MD · Transit Authorities · 2026 · Client: MTA / MDSHA
P3 design-build light rail system connecting major urban centers in the DC metro area over 16 miles. Endesco designed BMP facilities including bio-retentions, sand filters, and micro-bio-retentions, and provided traffic engineering and lighting design.
Hampton and Norfolk, VA · State DOTs · 2025 · Client: VDOT
$3.8B design-build project adding twin bored tunnels and express lanes on I-64. Endesco provided drainage design, H&H analysis, erosion and sediment control, stormwater management, and comprehensive lighting design.
DC/MD/VA · Transit Authorities · Client: WMATA
On-call IDIQ providing engineering support to WMATA through WSP: parking operations review, pedestrian/bicycle facilities, traffic configurations, and multimodal access analysis.