Colorado construction administration fails when engineering oversight treats field conditions, agency inspection sequences, and seasonal construction windows as variables to manage reactively. We build construction oversight around the realities that Colorado terrain and compressed building seasons create before contractors mobilize.
Modern Engineering Solutions delivers water and wastewater engineering across diverse regulatory environments, demonstrating efficient permitting and site-specific design expertise.
Taylor, Williamson County, TX
completed
The Gateway Water Reclamation Facility serves a large-scale mixed-use development in San Marcos, Hays County, Texas, combining data center operations, commercial facilities, and supporting systems. A traditional 1.0 MGD discharge permit in this region would have faced significant opposition from environmental groups concerned about impacts to the San Marcos River and Edwards Aquifer recharge zone, with public hearing processes routinely extending timelines to 30 or more months. Modern Engineering Solutions pursued the TCEQ 210E authorization pathway instead, securing approval in just 10 weeks with a zero-discharge reclaimed water system that eliminated surface water discharge concerns entirely.
San Marcos, Hays County, TX
completed
The Gateway Water Reclamation Facility serves a large-scale mixed-use development in San Marcos, Hays County, Texas, combining data center operations, commercial facilities, and supporting systems. A traditional 1.0 MGD discharge permit in this region would have faced significant opposition from environmental groups concerned about impacts to the San Marcos River and Edwards Aquifer recharge zone, with public hearing processes routinely extending timelines to 30 or more months. Modern Engineering Solutions pursued the TCEQ 210E authorization pathway instead, securing approval in just 10 weeks with a zero-discharge reclaimed water system that eliminated surface water discharge concerns entirely.
Taylor, Williamson County, Texas
completed
The Bradley Business Park Water Reclamation Facility required a wastewater solution for a mixed-use development in Taylor, Williamson County, Texas. When Williamson County denied the septic permit due to platting issues and site constraints that made conventional on-site treatment infeasible, Modern Engineering Solutions pursued the TCEQ 210E authorization pathway. This approach bypassed county jurisdiction entirely, placing the project under state-level TCEQ oversight with a zero-discharge reclaimed water system. The 4-week approval timeline allowed the developer to maintain construction schedules and avoid costly project delays.
Texas
completed
The Trinity Retail Plaza is a meticulously designed 2-acre commercial shopping plaza that seamlessly integrates high-quality retail spaces with innovative engineering solutions. Modern Engineering Solutions provided expertise in paving, grading, utility layout, and drainage design, while addressing site-specific challenges including streambank stabilization and storm drain improvements in full compliance with local and state regulations.
Lindsay, Texas
completed
The Bailey Ranch Estates is a meticulously planned 14-acre residential development featuring 48 thoughtfully designed lots alongside a 2.5-acre future industrial site. Modern Engineering Solutions provided expertise in site planning, coordination, and infrastructure design to ensure the successful execution of this project, serving the growing community in the city of Lindsay, Texas.
Magnolia Center, Corinth, Texas
completed
The Magnolia Center is a 2.67-acre mixed-use commercial development strategically located in Corinth, Texas. The project comprises a 10,800 sq. ft. office building and a 7,316 sq. ft. retail building featuring a drive-through facility. Currently in the final stages of construction, the development exemplifies the seamless integration of diverse commercial spaces designed to cater to the evolving needs of the community.
Oak Creek, CO
completed
The Town of Oak Creek faced aging water distribution and wastewater collection systems with unquantified water loss and infiltration and inflow issues. Modern Engineering Solutions conducted a comprehensive assessment of the infrastructure's age and condition, delivering a final report with clear engineering estimates and a prioritized roadmap for future system replacements and improvements.
Steamboat Springs, CO
completed
The Steamboat Mountain School Wastewater Treatment Plant (WWTP) project involved the design and construction of a new 10,000-gallon-per-day treatment facility to replace an outdated plant that could no longer meet the demands of the school’s growing operations and updated discharge requirements. The new WWTP ensures compliance with strict effluent limits, including BOD of 5 mg/L, TSS of 1 mg/L, and NH₃-N below 1 mg/L. Modern Engineering Solutions (MES) led the civil design efforts, working closely with the process engineering team to recommend improvements that enhanced performance and sustainability.
Phippsburg and Milner, CO
completed
The Phippsburg and Milner Wastewater Treatment Plants (WWTP) project involved the design and construction of two new treatment facilities to replace outdated infrastructure that could no longer meet the growing demands and discharge requirements of the communities they serve. With capacities of 32,500 gallons per day and 30,000 gallons per day respectively, the new WWTPs were designed to ensure compliance with strict effluent limits, including BOD of 5 mg/L, TSS of 1 mg/L, and NH₃-N of 50 mg/L. Modern Engineering Solutions (MES) led the civil design efforts, collaborating with process engineers to enhance the plants' performance and sustainability.
Yampa, CO
completed
The Town of Yampa Wastewater Treatment Plant (WWTP) project involved the design and construction of a new 105,000-gallon-per-day treatment facility to replace an outdated plant that no longer met the town’s wastewater needs or regulatory discharge requirements. The new WWTP ensures compliance with strict effluent limits, including BOD levels below 5 mg/L, TSS below 1 mg/L, and TIN below 21 mg/L, supporting sustainable growth and environmental stewardship. Modern Engineering Solutions (MES) led the civil design efforts, working closely with the process team to optimize system performance through strategic process recommendations.
Gypsum, CO
completed
The Riverdance RV Park Wastewater Treatment Plant (WWTP) project involved the design and construction of a new 40,000-gallon-per-day treatment plant to replace an outdated system that could no longer meet the growing demands and discharge requirements of the expanding RV park. The new WWTP was engineered to handle increased wastewater flows while ensuring compliance with strict effluent limits, including BOD of 5 mg/L, TSS of 1 mg/L, and Total Inorganic Nitrogen (TIN) of 80 mg/L. Modern Engineering Solutions (MES) led the civil design effort, collaborating with the process engineering team to recommend adjustments that optimized system performance.
Yampa, CO
completed
The Town of Yampa Collection System Improvements project focused on the rehabilitation of 20,000 feet of wastewater collection pipelines and upgrades to the community’s manholes. These improvements were designed to enhance the system’s reliability and reduce future maintenance needs. Modern Engineering Solutions (MES) took the lead on the project, working closely with local officials to develop effective engineering solutions and secure funding to support the town’s infrastructure goals.
Phippsburg & Milner, CO
completed
The Phippsburg and Milner Collection System Improvements project focused on enhancing essential wastewater infrastructure for both communities. The project involved the rehabilitation of 20,000 feet of aging collection pipelines and the lining and improvement of multiple manholes to ensure long-term durability and performance. These upgrades are critical to maintaining reliable wastewater service and reducing maintenance needs in the future. Modern Engineering Solutions (MES) led the design effort, providing technical expertise and support throughout the project lifecycle.
Florissant, CO
completed
The Florissant Lift Station and Collection System project focused on modernizing critical wastewater infrastructure for the community. This project involved the design of a new influent lift station with a capacity of 57,000 gallons per day and the rehabilitation of 35,000 feet of the existing collection system. These improvements are essential for maintaining reliable wastewater service and supporting future growth in the area. Modern Engineering Solutions (MES) led the design effort, ensuring the project met regulatory standards and aligned with funding requirements.
Milford, TX
completed
The City Limits RV Park Lift Station project was developed to support the wastewater needs of a growing RV park in Milford, TX. The lift station, with a capacity of 15,000 gallons per day, was designed to handle all three phases of the RV park’s development, ensuring long-term wastewater management and smooth operation for the facility. Modern Engineering Solutions (MES) played a key role in coordinating between stakeholders and developing engineering solutions to align with regulatory standards and local requirements.
Sasakwa, OK
completed
The Sasakwa Water Tank Improvements project addressed the challenges posed by an aging water storage tank in Sasakwa, Oklahoma. The tank had deteriorated significantly, with structural wear and coating breakdown that compromised its reliability and long-term capacity. Modern Engineering Solutions partnered with town officials to assess the tank's condition and develop a comprehensive engineering plan outlining the full scope of repairs needed. MES also supported the town's grant funding efforts by preparing a detailed engineering report documenting the tank's condition, repair requirements, and projected costs. Once funding was secured, MES prepared technical specifications for recoating and structural repairs, ensuring all work met industry standards and extended the tank's operational lifespan.
Sweetwater, TX
completed
The Bitter Creek Distribution Improvements project involves the relocation of four miles of waterlines to accommodate TxDOT improvements along the IH-20 corridor. This project ensures uninterrupted water service while supporting the infrastructure upgrades necessary for regional transportation improvements. Modern Engineering Solutions (MES) collaborated closely with stakeholders to provide on-site engineering expertise, ensuring a smooth construction process for Bitter Creek staff and seamless integration with the TxDOT project.
Martindale, Caldwell County, Texas
completed
Discharge permits in Caldwell County near the San Marcos River watershed face intense scrutiny from regional water authorities and environmental advocacy groups. Public hearings attended by Modern Engineering Solutions staff for neighboring discharge permit applications revealed highly contentious 30+ month permitting timelines. The 210E pathway bypassed this opposition entirely, securing approval in just 4 weeks by demonstrating beneficial agricultural reuse. The project’s 2.0 MGD scale, one of the largest 210E authorizations issued to date for MES, proves that flow volume does not limit 210E applicability when industrial components and viable reuse plans are present. The off-site reuse agreement with Circle G Livestock provides long-term disposal certainty while supporting local agricultural operations.
Routt County, CO
completed
MES contributed civil design services to the construction of a new 0.35 MGD wastewater treatment plant for Morrison Creek Metropolitan District. The scope covered grading, utility coordination, paving, stormwater drainage design, cut/fill calculations, and on-site construction observation, ensuring the facility was built to spec and ready for long-term reliable operation.
Teller County, CO
completed
The Arabian Acres Metropolitan District serves a disadvantaged community in Teller County, Colorado that needed significant improvements to both its water treatment and distribution infrastructure. The client qualified for SRF Loans and Grants, and Modern Engineering Solutions delivered two connected projects to address the community's water system needs from treatment through distribution.
Brighton, CO
completed
The Prairie Corner Wastewater Lift Station project in Brighton, Colorado required a full-service engineering approach covering site design, overflow piping, hydraulic calculations, and regulatory coordination. Modern Engineering Solutions contributed as a subconsultant, delivering technical expertise across multiple disciplines to ensure the lift station was designed, permitted, and built to serve the community reliably.
San Miguel County, CO
completed
Modern Engineering Solutions is proud to have played a significant role as a subconsultant in the Last Dollar PUD HOA Wastewater Treatment Improvement Project. This crucial initiative aimed at enhancing wastewater treatment facilities for the community, ensuring compliance with environmental regulations and improving overall quality of life. Our team contributed its expertise in site design, utility layout, and preparation of mechanical and process drawings to ensure the project's success.
555 S Allison Pkwy, Lakewood, CO
completed
The Belmar Library Outdoor Learning Area Expansion is a 0.05-acre civil engineering project completed for Jefferson County Public Library in Colorado. Modern Engineering Solutions was tasked with designing the grading and civil systems associated with the new outdoor learning area. The space opened in Summer 2022 and now serves as a safe, functional environment for children and families in the community.
1711 Ingalls St, Lakewood, CO
in_progress
The 1711 Single Family Homes project is a 0.75-acre residential development comprising six single-family homes in Colorado. The site presented real engineering challenges: a historically subdivided lot with tight spacing between homes, stormwater management requirements, and strict CDPHE utility line separation standards. Modern Engineering Solutions handled the full civil scope from paving and grading through utility coordination, delivering a functional and code-compliant development currently completing construction.
Pre-construction reviews identify subsurface conditions, utility conflicts, and sequencing constraints before contractors commit to prices. Colorado developers working with us don't negotiate change orders for conditions that complete due diligence should have shown, because bid packages reflect what contractors will actually encounter rather than optimistic assumptions that field conditions immediately contradict.
Critical construction phases get observed before inspection points so Colorado county and CDPHE inspectors see work that matches approved plans. Inspection failures requiring corrective work before winter closes construction windows get caught during construction rather than at inspection, because the engineers who designed the systems verify that field execution matches design intent.
Construction sequencing aligns with builder commitments so lot delivery dates reflect achievable Colorado construction timelines, accounting for weather windows, inspection sequencing, and agency review periods that optimistic scheduling consistently underestimates. Phase boundaries match what contractors can complete within construction seasons rather than what absorption models assumed without accounting for Colorado's compressed building calendar.
The engineers who designed Colorado civil and utility systems observe their construction and compile their acceptance documentation. Contractors get design intent questions answered by the people who made the design decisions rather than construction administrators interpreting other engineers' work. The result is fewer field interpretation errors, faster resolution of actual field problems, and closeout documentation that accurately reflects what was built.
Pre-construction services and construction phase oversight for a Colorado land development are most effectively provided by the same engineering firm that produced the civil and utility design. The engineers who made the design decisions understand the intent behind plan details that contractors question in the field, reducing the interpretation errors that happen when construction administrators work from other engineers’ drawings.
MES provides pre-construction and construction phase services for Colorado land developments where we produced the civil and utility design, as well as for developments where another firm produced design documents but the developer needs engineering oversight during construction. Pre-construction services include constructability reviews, pre-bid site walks, and contractor coordination meetings. Construction phase services include field observation at critical milestones, RFI responses, submittal reviews, and agency inspection coordination.
Pre-construction services for a Colorado land development typically include several distinct activities that happen between permit issuance and contractor mobilization:
– Constructability review: engineers walk through construction sequencing to identify plan details that field crews would have to improvise around, subsurface conditions that preliminary investigations may have missed, and utility conflicts that weren’t fully resolved during design
– Pre-bid site walk: contractors visiting the site before submitting bids get questions answered about conditions, sequencing requirements, and access constraints that affect pricing
– Bid package review: bid documents get reviewed to confirm that contractor scope, scheduling requirements, and testing obligations are clearly defined before bids are submitted
– Pre-construction meeting: contractors, subcontractors, utility districts, and the engineering team align on sequencing, inspection requirements, submittal schedules, and communication protocols before work begins
Colorado construction seasons compress the window for correcting problems that pre-construction coordination would have prevented. MES conducts pre-construction services specifically to eliminate the field problems and change orders that result from contractors mobilizing without complete information about site conditions and construction requirements.
Construction phase engineering services for a Colorado land development cover the oversight activities between contractor mobilization and project completion:
– Field observation: site visits at critical construction milestones including grading, utility installation, concrete pours, and compaction to verify field work matches approved plans
– RFI responses: written responses to contractor requests for information about plan intent, field conditions, and design clarifications that arise during construction
– Submittal review: review of contractor submittals including shop drawings, material certifications, and equipment data to verify compliance with design specifications
– Change order evaluation: engineering review of proposed changes to confirm necessity, verify proposed solutions are technically sound, and document design intent changes for as-built records
– Agency inspection coordination: scheduling and coordination of CDPHE and county inspections to align with construction sequencing
Colorado’s compressed construction season makes same-day RFI responses and rapid field observation scheduling more valuable here than on projects where weather doesn’t create hard deadlines. MES structures construction phase services around Colorado’s seasonal constraints so engineering response times don’t idle construction crews during the months when the site is productive.
Startup and commissioning support covers the engineering activities required to bring water and wastewater systems from construction completion to agency acceptance and operational readiness.
For water distribution systems in Colorado, startup and commissioning typically involves:
– Pressure testing of distribution mains at required test pressures with documentation of results
– Disinfection of the distribution system using chlorination procedures that meet CDPHE standards
– Bacteriological sampling at multiple points within the system with laboratory results demonstrating absence of total coliform
– System performance verification under operating conditions before CDPHE certification is requested
For wastewater collection systems in Colorado, startup and commissioning typically involves:
– Mandrel testing or video inspection of gravity sewer mains to verify pipe integrity
– Air testing or pressure testing of sewer mains to verify watertightness
– Lift station performance testing under simulated peak flow conditions
– Control system verification and alarm testing
MES coordinates startup and commissioning with Colorado contractors and schedules testing milestones to align with lot release schedules, so CDPHE acceptance documentation is complete before certificates of occupancy are needed rather than becoming the last item holding up closings.
Certificate of occupancy delays on Colorado development projects trace back to two primary causes: inspection failures requiring corrective work, and incomplete closeout documentation.
Inspection failures happen when field work deviates from approved plans, either because contractors improvised solutions to field problems without engineering guidance, or because approved plans contained conflicts that construction exposed. CDPHE and county inspectors compare field conditions to approved drawings, and deviations that weren’t authorized through plan amendment require correction and reinspection before acceptance proceeds.
Closeout documentation delays happen when as-built drawings, test records, and agency correspondence get assembled after construction finishes rather than compiled during construction. Colorado county engineers typically require complete as-built packages before recording final plats, meaning documentation that isn’t ready when construction finishes delays recording and holds certificates of occupancy on lots that are otherwise ready for closing.
Both causes are preventable through construction administration that maintains plan compliance and documentation discipline throughout the project. MES addresses both through field observation at critical milestones that catches deviations before inspections, and through progressive closeout documentation assembly that keeps records current as construction advances rather than creating a documentation backlog at project end.
Colorado’s construction season directly constrains development timelines in ways that flat-terrain markets don’t experience. Front Range construction windows typically run from April through October, with meaningful work possible outside those months on lower-elevation sites but increasingly limited as elevation increases.
The practical consequences for land development timelines include:
– A phase of infrastructure that misses the construction window pushes all dependent lot releases into the following year, not just by the delay duration
– Inspection failures in September or October requiring corrective work may not be addressable until the following spring, holding certificates of occupancy on finished lots for 5-6 months
– Phasing plans that assume continuous year-round construction underestimate actual timelines when weather stops work for 4-5 months
Colorado developers working with us build phasing plans that account for seasonal construction constraints from the beginning rather than discovering the impact when a schedule that assumed year-round productivity meets a Colorado winter. Construction sequencing that prioritizes inspection milestones and agency acceptance requirements within the productive construction season protects lot delivery commitments that builder contracts depend on.
CDPHE requires specific inspection and testing milestones for water and wastewater systems constructed under Colorado permits before those systems can be placed in service.
For water distribution systems, required milestones include:
– Pressure testing of distribution mains at 150 PSI for two hours with no measurable pressure drop
– Disinfection of the distribution system using CDPHE-approved chlorination procedures
– Bacteriological sampling at multiple points demonstrating absence of total coliform before the system can serve connections
For wastewater collection systems, CDPHE typically requires:
– Mandrel testing or video inspection of gravity sewer mains to verify pipe integrity and confirm no joint deflection
– Air testing or pressure testing of sewer mains to verify watertightness meets CDPHE standards
– Inspection of manholes and service connections before backfill covers the work
These requirements apply in addition to any county-specific inspection requirements for civil infrastructure. Scheduling these inspections to align with construction sequencing rather than completing construction and then requesting inspections prevents the timeline delays that occur when inspections fail at the last stage of an otherwise complete project. MES coordinates CDPHE inspection scheduling as part of construction phase services so inspections occur when construction is ready for them rather than becoming last-minute schedule constraints.
Project closeout for a Colorado land development covers all activities between construction completion and final county recording and agency acceptance. A complete closeout typically includes:
– As-built drawing preparation reflecting field conditions as constructed rather than design intent
– Test records compilation including pressure tests, bacteriological results, and compaction documentation
– Agency acceptance submittals to CDPHE and county engineering for water, wastewater, and civil infrastructure
– Warranty documentation and operation and maintenance manual assembly for district acceptance
– Final plat recording coordination after all agency acceptances are received
Closeout timelines in Colorado vary significantly based on how documentation was managed during construction:
– Documentation assembled progressively during construction: 4-8 weeks from construction completion to final recording
– Documentation assembled after construction finishes: 3-6 months from construction completion to final recording
The difference matters because finished lots in later phases cannot close until the infrastructure serving them receives final agency acceptance. MES compiles closeout documentation progressively during construction so acceptance packages are ready to submit immediately after construction milestones complete rather than becoming the last deliverable holding up lot closings.
Construction change orders on Colorado development projects most commonly originate from three preventable sources:
Unforeseen subsurface conditions are reduced through adequate geotechnical investigation before design begins. Boring logs that reveal rock depths, groundwater levels, and soil conditions give contractors the information they need to price accurately. Colorado’s variable subsurface geology makes this investigation more valuable per dollar here than in markets with more predictable subsurface conditions.
Utility conflicts are reduced when civil grading, water, wastewater, and dry utility design advance simultaneously with shared terrain data rather than sequentially with each discipline inheriting constraints from previous ones. Conflicts resolved during design cost hours. The same conflicts discovered during construction cost change orders.
Plan deficiencies are reduced through constructability reviews before bid packages go out. Engineers walking through construction sequencing identify details that field crews would have to improvise around, coordination requirements between trades that aren’t clear from the drawings, and access constraints that affect construction methods.
MES combines all three practices on Colorado construction administration projects. The combination reduces change order exposure significantly compared to projects where investigation is abbreviated, design disciplines work independently, and constructability isn’t reviewed before bidding.
A failed CDPHE or county inspection on a Colorado development requires corrective work followed by reinspection before construction can proceed past the failed milestone or before the system can be placed in service.
The consequences of an inspection failure depend significantly on when it occurs:
– Early in the construction season: corrective work can typically be completed and reinspection scheduled within the same construction window, adding days to weeks to the project timeline
– Late in the construction season: corrective work may not be completable before winter closes the site, carrying the failed inspection into the following construction season and potentially holding certificates of occupancy on finished lots for 5-6 months
Common causes of inspection failures on Colorado developments include field work deviating from approved plans without engineering authorization, testing procedures not meeting CDPHE standards, and construction materials not matching specifications.
MES addresses inspection failure risk through field observation at critical milestones before inspection points rather than after. When field work is observed by the design engineer before the inspector arrives, deviations from approved plans get corrected at a fraction of the cost of failed inspection corrective work. The goal is inspections that pass the first time rather than correction sequences that compete with Colorado’s construction season for available calendar.
The same engineering firm that produced design documents is not required to provide construction administration in Colorado, but using the design engineer for construction oversight produces better outcomes for several reasons specific to how land development construction works.
Engineers who produced the design understand the intent behind plan details that contractors question in the field. When a contractor submits an RFI asking whether an alternative pipe material or installation method is acceptable, the design engineer can evaluate the request against the actual design intent rather than inferring intent from drawings they didn’t produce. This reduces both response time and the risk of approving substitutions that compromise design performance.
Design engineers also recognize when field conditions are producing results that don’t match design intent before those conditions become visible failures. A grading engineer observing earthwork recognizes when compaction patterns suggest the fill material differs from what was specified. A utility engineer observing pipe installation recognizes when bedding conditions will produce differential settlement that wasn’t in the design assumption.
MES provides construction administration for Colorado developments where we produced the design and for developments where another firm produced design documents. Where we didn’t produce the design, we conduct a thorough plan review before construction begins so our field engineers understand design intent rather than learning it from contractor questions during construction.
As-built documentation for a Colorado land development records the actual constructed conditions as opposed to the design intent shown on permit drawings. Required as-built documentation typically includes:
– Civil grading as-builts showing finished grades, drainage features, and detention pond elevations as constructed
– Water distribution as-builts showing main alignments, valve locations, service lateral connections, and pressure zone equipment as installed
– Wastewater collection as-builts showing gravity main alignments, manhole locations, service lateral connections, and lift station equipment as installed
– Test records including pressure test results, bacteriological sample results, compaction test results, and any other testing required by CDPHE or county standards
Responsibility for as-built production is typically shared between the contractor and the engineer of record. Contractors maintain field records of actual installation locations, depths, and material substitutions. The engineer of record incorporates contractor field records into as-built drawings that meet CDPHE and county submission standards.
Colorado county engineers and CDPHE require as-built documentation before accepting public improvements and before recording final plats. As-built packages that are incomplete or don’t accurately reflect field conditions generate correction requests that delay final recording.
MES compiles as-built documentation progressively during construction rather than assembling it from contractor records after the project finishes. Progressive compilation produces more accurate as-builts because field conditions are documented when they’re visible rather than reconstructed from memory and field notes after backfill has covered the work.