Engineering for the Future

Our core engineering services are predicated on delivering highest quality design for state, county, and city expanding the complex mobility infrastructure. OTHON project managers and engineers have met these challenges through our extensive experience and accrued expertise. In 30 years, we have delivered practical and economic engineering solutions totaling 1,000+ miles of roadway and structural design. OTHON engineers consistently evolve new techniques and a unique approach to achieve highest levels of quality and safety.

An expansive design team dedicated to improving the safety of structures, and promoting innovative 3D modeling and economic solutions, OTHON’s structural group has designed 100+ bridges, earning a reputation as a leader in structural design capabilities for all our clients. Our structural design portfolio encompasses major and minor bridges, multi-level interchange bridge structures, and cast-in-place / precast post-tensioned segmental bridges.

OTHON knows traffic engineering is a multifaceted practice that, to be effective, must encompass multiple services, each contributing data important to a final “go/no go” decision on a new roadway. Our traffic engineers have produced operational studies on 2,000+ miles via operational studies, propelling OTHON into a national leader in this discipline. OTHON also offers engineers experienced in design of intelligent traffic systems. Additionally, our traffic engineering package includes:

Enhancing mobility in our communities will foster inclusion, social equity, fiscal viability, and economic vitality for all citizens. To enhance mobility, OTHON specializes in travel demand modeling, corridor studies, feasibility studies, route studies, and long-range planning for state, MPO, and community projects. We also focus on environmental planning and emerging technologies. OTHON owns the expertise to devise innovative, practical, cost-efficient solutions to address and resolve even the most demanding planning challenges. Our wealth of experience enables us to customize solutions to suit your project’s unique requirements. We merge insights into human preferences and behaviors with thorough data analysis to future-proof cities:

Construction management services deliver two “must do” objectives:

• Facilities are constructed according to approved plans that satisfy all requirements of the client and the public / governmental agencies involved, and
• Guarantee a safe environment for all users and construction workers.

OTHON provides comprehensive services performed with laser focus from groundbreaking to ribbon cutting. We perform an initial comprehensive constructability review of all design components. We provide construction engineering and inspection, including daily work reports and verification of the accuracy of contractor charges. Understanding that during construction, schedule deviations can be budget busters, we perform a time impact analysis anytime an unexpected issue arises.

OTHON’s ability to provide a complete range of design-build engineering (DB) services for multibillion-dollar projects has made us a leader in design and construction of major managed lane and tolled corridors nationally. Our value engineering, quality control, and innovation produce improved design, optimized life-cycle performance, enhanced aesthetics, and cost savings. OTHON provides full-service engineering simultaneously with development of construction packages in major disciplines.

As we deliver system solutions, we carefully address the complex challenges of meeting the growing demand for safe drinking water while protecting both ground and surface water resources. Today, many government agencies, commercial enterprises, and private companies face a host of issues including fiscal constraints, high-density development, aging infrastructure, capacity limitations, and the need to comply with increasingly stringent environmental regulations.

With our comprehensive understanding of regulatory frameworks and permitting requirements, our team assures that projects remain fully compliant. We provide a wide range of services, including feasibility studies, new facility construction, rate structure analysis for water supply, treatment, storage, and distribution, as well as wastewater conveyance and treatment design. Additionally, we have extensive experience in developing design alternatives, creating rehabilitation plans, performing sophisticated hydraulic modeling and conducting thorough wetlands investigations.

Design: Our team of experts will lead the detailed design of the stormwater surface collection and conveyance system, assuring full compliance with project criteria. Storm sewers and ditches will be appropriately sized to meet the required storm frequencies and capacity standards, in line with agency regulations. To optimize project costs, SWMM modeling will be utilized to evaluate various drainage alternatives, considering factors such as pond impacts and flat terrain. Additionally, we will analyze the capacity of existing storm sewers and ditches to determine whether additional laterals are necessary, with the goal of minimizing the length and depth of the storm sewer system.

Detention: Stormwater detention will be incorporated to address the increased runoff from additional impervious surfaces due to new paving. We will conduct an impact analysis to assure the project does not negatively affect adjacent properties. The required detention storage volume will be calculated for each drainage area, based on inflow hydrographs and the maximum allowable outflow for the design storm event. Any additional impervious area from new paving will be accounted for in this analysis. To minimize costs, our team will work closely with the client to identify the most feasible and environmentally sustainable detention locations.

Stream Crossings: Crossing structures will be modeled using HEC-RAS for existing, interim, and ultimate conditions. In floodplain areas, we will develop a base hydraulic model calibrated to the FEMA Flood Insurance Study (FIS) and Flood Insurance Rate Map (FIRM) data, including the Base Flood Elevation (BFE). The model will then be updated to reflect the proposed crossing structure. A comparative analysis of the existing and proposed models will be conducted to quantify any potential impacts. We will design the proposed structure to minimize its effect on the floodplain, ensuring compliance with regulatory standards.