Aterra Solutions

Comprehensive engineering services supporting dam safety and performance standards. Capabilities span dam safety assessments, rehabilitation analysis, and full design under the Natural Resources Conservation Service (NRCS) Watershed Rehabilitation Program.

Sophisticated flood hazard re-evaluations, flood protection assessments, and mitigation strategies for nuclear facilities. Services include Probabilistic Flood Hazard Assessments at low annual exceedance probabilities and specialized deterministic modeling.

Technical evaluation and documentation in compliance with U.S. Army Corps of Engineers and FEMA guidelines. Evaluations cover stability and seepage, freeboard, management of interior drainage, and operations and maintenance components.

Work in this area is organized into supported delivery tasks.

• High-accuracy Hydrologic

  Support includes High-accuracy hydrologic.

• Hydraulic Modeling Using State-of-the-practice Techniques To Evaluate Severe Flood Hazards

  Support includes hydraulic modeling using state-of-the-practice techniques to evaluate severe flood hazards.

• Mapping

  Support includes mapping.

• Mitigation Requirements

  Support includes mitigation requirements.

• Work In This Area Is Organized Into Supported Delivery Tasks

  Support includes Work in this area is organized into supported delivery tasks.

Design and permitting services for stormwater systems, including erosion and sediment control planning and National Pollutant Discharge Elimination System compliance.

Civil and geostructural design support tailored for transportation infrastructure, including pavement and slab-on-grade design.

Integrated geotechnical and structural services combining disciplines to ensure projects rest on strong foundations, are structurally sound, and are cost-effective to construct.

• Subsurface Investigations & Site Characterization

  Techniques including drilling, test borings, rock coring, groundwater wells, in situ testing, air track probes, test pits, and geophysical testing.

• Geotechnical Analysis

  Analysis of earthwork, subgrade preparation, slope stability, lateral earth pressure, bearing capacity, settlement, and rockfall hazard mitigation.

• Geostructural Design & Retaining Structures

  Design of deep and shallow foundations, micropiles, augercast piles, drilled shafts, driven piles, support of excavation (SOE), sheet pile walls, soil nail walls, and mechanically stabilized earth (MSE) walls.