Services

The key to improving today’s transportation needs is an effective and informative plan. Sigma has over 30 years of experience designing transportation projects including interstates, interchanges, intersections, urban arterials, rural divided highways, and local roads for LA DOTD and other state and local agencies. We emphasize constant communication with our clients and impacted agencies to coordinate and balance the goals of the project with dynamic project costs.

Man-made structures are a mainstay of our environment. Whether it is a bridge, building, foundation or special application structure, Sigma’s engineers take into account the technical requirements, aesthetics, and cost efficiency in every project. Our engineers are well versed in the latest AASHTO and ASCE structural codes and design requirements.

Our dedication to preserving and protecting the wetlands and ecosystems along our gulf coast is evidenced in our efforts to provide solutions that benefit both the human and natural environments. We can provide planning, surveying, design, and permitting services for several types of coastal restoration and protection projects including marsh creation, beneficial use of dredged materials, hydrologic restoration, shoreline protection, water control structures, levees, and flood protection projects.

We take a proactive approach, fostering positive effective communication with regulatory agencies, landowners and other stakeholders to resolve issues and expedite the process. We prepare environmental assessments and impact statements; develop compensatory mitigation plans; assist in obtaining regulatory permits; and perform environmental inventory studies.

Sigma plans, models, and designs wastewater collection systems for East Baton Rouge and surrounding parishes. We focus on constructability and incorporate alternative construction methods such as pipe bursting, horizontal directional drilling, micro-tunneling, auger bore, etc., when practical in order to reduce impacts to property owners and existing infrastructure.

Sigma has vast experience in the area of comprehensive rehabilitation to wastewater collection systems including gravity mainlines, service laterals, manholes, and pump stations. Our staff are extremely knowledgeable in rehabilitation methods such as cured-in-place pipe (CIPP), pipe-bursting, slip-lining, trenchless point repairs, and coatings. Sigma has been involved with the rehabilitation of over 1,300 miles of gravity sewer pipe and 22,000 manholes in East Baton Rouge Parish from CCTV and physical inspection, basin characterization and pipe assessment, rehabilitation design, plan and specification preparation, to construction completion.

Sigma can perform a wide variety of hydraulic and hydrological studies and designs including HEC modeling, bridge scouring analysis, channel design and improvements analysis, the design of major culvert crossings for waterways, large and small drainage basin studies, and coordinating with FEMA for map revisions and flood risk assessments. We have also prepared numerous drainage impact studies for land development, industrial plants and highway improvement projects. Sigma is also intimately familiar with LA DOTD’s Dam Safety Program and has designed dams in Louisiana in accordance with that Program.

At Sigma, we provide full design services for single family and multi-family residential developments as well as retail and office commercial developments. From conceptual layouts, preliminary plats, local approval processes, construction plans, permitting, bidding and construction administration, we can turn your vacant land into a bustling community or quiet retreat.

Sigma partners with our clients to orchestrate resources, time, money, and data to systematically plan, design, construct, and deliver multiple, related projects in a coordinated approach to ensure those clients attain benefits that may not otherwise be realized. By providing major aspects of Program Management such as Planning, Governance, Engineering, Administration, Construction Management, and constant Stakeholder Communication and Interaction, Sigma can help many organizations realize their overall vision and goals. Sigma has considerable relevant experience in Program Management, project planning and implementation, capital improvement programming, and project budgeting and prioritization.

Every new project starts with understanding the existing conditions. Surveying is a critical element of advancing your project to reality. Sigma’s survey crews and surveying professionals provide a wide range of land surveying services. We have the capabilities and experience in providing GPS control surveys, boundary surveys, topographic surveys, in-shore hydrographic surveys, flood elevation certificates, slab surveys, and construction stakeout. We also can prepare digital terrain models, earthwork computations, right-of-way maps, plats, and legal descriptions.

At Sigma, we not only provide engineering and surveying, we can see your project through construction. We offer support with bidding, construction contract documents, contractor selection, and construction inspection services.

Delivery schedules for complex projects are many times driven by the process of acquiring the necessary land rights. Communicating amicably and entering into early agreements with landowners can be critical to the success of a project. Sigma manages consultants to perform abstracting, appraisals, acquisitions, relocations, negotiations and expropriations. Sigma has experience in dealing with landowners on fee title acquisitions, servitude acquisitions, and relocations in accordance with the Uniform Relocation Assistance and Real Property Acquisition Policies Act of 1970.

Sigma is excited to provide Subsurface Utility Engineering (SUE) services statewide to municipalities, designers and contractors alike. We can assist with overall location & potholing, utility coordination, relocation design, cost estimating, and agreement development. Sigma has experience in all Quality Levels: from the research and mapping involved in levels C and D, to the hands on geophysical sensing, potholing, & surveying required in levels A and B. Our services have been used by clients to avoid costly construction delays, utility outages, and damaged equipment.