Hagen Engineering provides construction phase engineering services that ensure your project is built as designed — from submittal review through permit close-out and final as-built documentation.
The engineering process doesn't end when permits are issued. Construction administration is the critical phase where engineering design meets field execution. Issues discovered during construction — material substitutions, field conditions that differ from design assumptions, contractor questions — all require timely engineering response to keep the project on track and maintain the integrity of the design.
Construction administration is often treated as an afterthought, a checkbox obligation rather than a strategic service. This creates significant risk. Projects without active construction-phase engineering frequently encounter problems at close-out: utilities that fail testing, as-built drawings that don't match what was built, and permit conditions left unsatisfied. These issues are far more expensive to fix after construction than to prevent during construction.
Hagen Engineering provides construction administration services that maintain design integrity while responding quickly to field conditions and contractor inquiries. We review submittals promptly, coordinate utility testing and inspections, procure accurate as-built documentation, and manage the permit close-out process. We're accessible to the contractor and responsive to field issues — we keep the project moving forward without creating delays or creating risk to final acceptance.
Before contractors and fabricators begin work, they submit shop drawings and structural submittals to verify their proposed approach conforms to the design. These submissions typically include detailed drawings showing structural connections, fabrication methods, material specifications, and dimensions. Our role is to review these submissions and verify they're consistent with the approved construction documents and applicable building codes.
We examine structural steel connections to ensure bolt types and patterns match design requirements. We review precast concrete shop drawings to verify lifting points, connections, and dimensional tolerances. We evaluate structural wood framing submittals to confirm lumber grades and connection details. We provide clear, documented responses — approved, approved as noted, or revise and resubmit — so contractors know exactly what's acceptable and why. We aim to review submissions promptly and provide clear feedback so construction isn't delayed by engineering review bottlenecks.
During site construction, contractors submit material specifications for pipes, aggregates, geotextiles, concrete mix designs, erosion control products, and other materials that will be incorporated into the permanent construction. We review these submittals to verify proposed materials meet specification requirements and are appropriate for the site conditions.
When contractors propose material substitutions, we evaluate the alternative against the original specification and provide a documented engineering assessment. Will the substitute perform as required? Does it meet applicable standards? Is the cost savings worth any potential risk? We work with contractors to find acceptable alternatives when requested, but we maintain specification requirements when they're essential to project performance. Our goal is to enable contractor flexibility while preserving design intent and project quality.
At project completion, accurate as-built drawings are required for municipalities to accept public infrastructure — roads, water systems, sewer systems, stormwater facilities — into their maintenance systems. As-built drawings show the facilities exactly as constructed, with all field modifications, elevation changes, and location adjustments documented relative to the approved design.
As-built documentation is often the last item completed on a project, frequently delayed or incomplete. We proactively manage the as-built process to prevent these delays. We coordinate with surveyors and contractors to establish survey requirements early, conduct field surveys during construction to capture accurate data, and review as-built drawings against approved plans to ensure they meet municipal acceptance requirements. We've learned from experience: incomplete or inaccurate as-builts are among the most common reasons for delays in project close-out and bond release from municipalities.
Before municipalities accept public utility infrastructure, specific testing must be completed and documented. Water lines require pressure testing to verify they're watertight and can hold required pressure without leaks. Sewer lines require mandrel testing to verify pipe diameter and shape, and often CCTV (closed-circuit television) inspection to verify the interior condition. Fire hydrants require flow testing to confirm adequate water supply and pressure. Stormwater systems require smoke testing and flow testing to verify proper connections and hydraulic performance.
We coordinate these utility tests with the contractor and municipal utility inspectors. We witness tests, document results, and ensure all testing requirements are satisfied before requesting final acceptance. We maintain the documentation trail so utilities and municipalities have complete records showing the systems meet required standards and were built as designed. Many projects get delayed at the end because testing records are incomplete or testing failed and rework is required. By staying engaged throughout construction, we help prevent these close-out delays.
When construction is substantially complete, permitting agencies require a final demonstration that the project was built in substantial conformance with approved plans and that all conditions of approval have been satisfied. This is the permit close-out process, and it's surprisingly complex if not managed carefully.
We manage the close-out process by coordinating final inspections with all permitting agencies, submitting required documentation (as-built drawings, utility test results, construction completion affidavits, maintenance agreements), and demonstrating compliance with specific permit conditions. Some conditions require formal documentation; others require only that we show the work was done. We track all conditions through to resolution and keep permitting agencies informed of our progress. We've learned what each jurisdiction requires and what documentation they need — this knowledge accelerates the close-out process and prevents back-and-forth requesting missing items.
Periodic field inspections during construction verify that work is proceeding in accordance with the approved plans and that installed materials and systems meet specification requirements. We inspect grading to verify existing terrain is modified as designed, topography matches approved contours, and drainage slopes are correct. We inspect utility installation to verify lines are at correct elevations and depths, connections are made properly, and materials conform to specifications. We inspect stormwater infrastructure to verify pond/basin dimensions match design, outlet structures are installed correctly, and vegetation is established as required. We inspect erosion control measures to verify they're maintained throughout construction and removed when appropriate.
When we identify deviations from the approved plans, we work with the contractor to determine whether the deviation is acceptable as-built, requires corrective action to meet design standards, or represents a design modification that requires our approval. We document all inspections with written reports and photographs, creating a record of construction quality and compliance. If issues arise at close-out, we have documentation showing when we identified the issue and what was done to address it.
Construction administration is where good design meets the reality of field conditions. At Hagen Engineering, we've managed enough projects to know that active construction-phase engineering is essential to successful project delivery. We're responsive to field issues, we maintain documentation rigorously, and we manage the close-out process efficiently. If you're developing in the Southeast and want experienced construction administration services, we're ready to help ensure your project is built right.
Let Hagen Engineering manage your construction phase services. Timely submittal review. Accurate as-built coordination. Successful permit close-out. Real results.