UMC completed the exterior coating of two separate meal storage tanks that were approximately 80' tall x 20' diameter. The tanks were experiencing severe spot corrosion on the exterior weld seams that in some areas had resulted in holes in the tank walls. This project was made particularly challenging by the fact that the client would not allow any abrasive blasting or spray-coating to be done on the tanks. UMC prepped the surface of the tanks using industrial degreaser and 5,000 psi water blasting to remove any surface contaminants prior to doing any coating work. After the general surface prep was complete, UMC repaired the metal holes before hand-prepping and spot-priming the corrosion areas. After the corrosion areas were addressed, UMC brush and roll-applied a high-quality silicone alkyd coating to all exterior surfaces of the tanks. This coating is primarily used on previously painted substrates and provides superior color and gloss retention over conventional alkyd enamels. The tanks were not accessible by using boom lifts or suspended scaffolding which required UMC to erect full scaffolding for each tank. This project resulted in a satisfied client with tanks that will look great and perform well for years to come.
A petroleum refinery in Oklahoma was experiencing seepage on a 30 inch oily water sewer line. In order to help fix the infiltration the pipe had been rehabilitated by installing CIPP the length of the line. After the pipe-lining was completed UMC was called upon to rehabilitate and epoxy-coat multiple manholes and structures on the newly-lined pipe. UMC began by stopping any points of infiltration in the structures. After the leaks were controlled the cement and brick structures were coated with 250 mils of 100% solids epoxy. The coating was tied-in to the CIPP liner in order to create a monolithic structure that extends the entire length of the rehabilitated sewer line and will provide lasting protection against corrosion and infiltration. The strict safety requirements set forth by the refinery were met and exceeded by UMC for the duration of the project.
completed the interior coating of a 55 ft. x 44 ft. bolted steel tank with
approximately 5 mils of spray-applied epoxy primer and approximately 80 mils of
spray-applied polyurea topcoat. The tank was experiencing severe corrosion on
the center support column, the upper tank walls, and the roof beams. The complete
interior of the tank had to be wet- abrasive blasted in order to remove any
existing rust or corrosion. This also provided us with the proper profile to
ensure that the coating would bond properly to the steel substrate. UMC removed
the existing support column and roof beams and replaced them with new beams
that we coated off-site prior to beginning the project. After the roof of the
tank was coated and the beams were installed, we completed the coating of the
walls and the floor of the tank. UMC had to overcome several obstacles in the
completion of the tank, including having to race the November weather in order
to beat the Colorado freeze due to the sensitive nature of the tank contents. Another
challenge was containing the copper slag blast material that was used to the
inside of the tank in order to avoid any negative impact on the environment.
Safety and quality are of utmost importance here at UMC, and we took every step
possible to provide a high quality project that was completed on a tight
schedule and without incident.
UMC was called upon to carry out the coating of a severely deteriorated industrial waste structure with 100% solids epoxy, approximately 1,600 SF. UMC’s crew mobilized and removed four slide gates and their associated assemblies, handrails and catwalks in order to access the interior of the concrete structure. After masking the remaining steel surfaces and bolts, we applied a monolithic coating of epoxy to the complete interior of the structure to protect the surface from corrosion caused by wastewater and to ensure the longevity of the structure. After the coating was fully cured our crew replaced the slide gates, handrails and catwalks. One of the challenges associated with this project was that flow had to be diverted by using plugs on 5 different pipes ranging from 24” to 36”. UMC was able to complete all work safely, on budget and on schedule.
UMC completed two separate composite repair projects on sections of pipe for this client. The first project consisted of the internal composite repair of 10 LF of 24 inch PVC cooling water line including 2 each 45 degree mitered bends. The cracks around the mitered bends were filled with grout and then the entire area in question was prepped and coated with 100% Solids Epoxy layered with carbon fiber. For the second project, UMC was called upon to find and repair several damaged areas inside a 24 inch diameter PVC cooling water line. UMC was able to locate the damaged areas in the pipe by CCTV and pressure testing of four separate 24 inch cooling lines. Once UMC was able to determine which areas were damaged and causing leakage, we were able to prep and coat the surface with 100% Solids Epoxy layered with carbon fiber. After the repairs were completed and the epoxy was cured-out, the line in question was once again pressure tested to ensure that the repair was effective. Both of these projects required stringent lockout-tag out and confined space entry procedures due to the location of the pipes. UMC was able to carry out all work efficiently and without incident.
Three water vaults under residential streets were showing signs of infiltration and the manager of Academy Water and Sanitation District felt that epoxy coating was the answer. Utility Maintenance Contractors was able to coat the vaults with 125 mils of 100% solids epoxy and ensure that the vaults would not be subject to further infiltration problems. Work was performed during winter months and offered challenges with bringing the concrete structures to an acceptable temperature for coating. Residents were not impacted by UMC’s work area and all coating work was completed on schedule and at budget.
Simon Contractors was in the process of installing a new road and all associated utilities when they discovered that the waste water piping material was too flexible to form a water tight seal at the manholes. They contacted Utility Maintenance Contractors for a solution to the infiltration problems on 12 manholes. With UMC’s quick mobilization and production rate, the contractor was saved 10's of thousands of dollars in bypass costs. Installation of 250 mils of 100% solids epoxy solved their infiltration problems and the project was completed at cost and on schedule.
Colorado Springs Utilities was having serious infiltration issues with a manhole next to one of its lift stations. This particular manhole housed a pressurized pipe with flow meters that had been covered by surcharged ground water to the point that the utility was unable to attach sensors to read the flow on the pipe. CSU contacted UMC to mitigate the infiltration and bring the manhole back to a functional state. Infiltration at the pipe penetration was constantly flowing and required hydrophilic grout to seal the leaks from the outside. Our crew mobilized and injected the grout allowing the manhole to be dried for application of the epoxy. After masking the pipe and meters in the manhole, a monolithic coating of epoxy was applied to ensure the manhole would remain dry and functional. This procedure was performed in a single day with no digging required and no interruption of service to the district or end users.
Utility Maintenance Contractors, LLC was contacted by the property management company for a small shopping center in Conifer, CO with complaints of infiltration in one of the wastewater manholes on their property. Another contractor had previously tried to stop the infiltration at the bench with some cementitious product which resulted in relocating the infiltration point to an area near the invert at the pipe penetration. UMC mobilized and was able to inject hydrophilic grout through the barrel section of the manhole to eliminate the infiltration in that area. Knowing the budget constraints of a small mountain shopping center, we proceeded to coat the bottom portion of the manhole to eliminate the chance of further spread of infiltration. Total time from the first date of contact to project completion was less than two weeks with all coating work happening in one day and no disruption of service or impact to the owner.
UMC was subcontracted by Wildcat Construction Colorado to complete the epoxy lining portion of the “Par 1136 - Diversion Structure Rehab” project. This work included the epoxy lining of moderately to heavily deteriorated concrete diversion structures, approx. 14,000 SF. One of the difficulties that this project presented was that not all of the structures could have their flows diverted while the coating work needed to be done. With a lot of planning UMC was able to safely complete all work on schedule.
UMC was contacted by HDR Constructors, Inc. for coating of a newly constructed diversion structure and some repair work to manholes damaged during the clean-up of Sand Creek after the fall flooding of 2013. Metro Wastewater Reclamation District is the owner of the interceptor that parallels Sand Creek in this particular area, and MWRD requires Warren Environmental Epoxy as one of the few products approved for use on their waste water infrastructure. A couple of the damaged manholes had been previously coated with 100% solids epoxy and required repair at the joints. HDR also contracted UMC to coat the new lids and risers added to raise the structures out of the Creek. On the first mobilization it was determined that the required 28 day cure time had not passed for one of the structure lids. HDR asked that UMC come back again after the proper cure of the concrete to perform that work in addition to another 3 manholes requiring coating.
Utility Maintenance Contractors was contracted by SEH Engineers and SWSDWSD to eliminate infiltration on 15 of the district’s manholes. The structural condition of the manholes was acceptable so after proper surface preparation, UMC spray applied 125 mils of 100% solids epoxy to the manhole barrel section, bench and invert for a completely sealed manhole. We were able to utilize flow-through plugs instead of a bypass system to keep costs to the owner down. All traffic control, ROW permitting, and water use permitting for the ~2,500 SF total of coated surfaces was obtained by UMC prior to the start of coating operations. This effort minimized the required efforts of time and energy on the part of the owner and the engineer, and the project was completed safely, ahead of schedule, and on budget.
This project arose when Wildcat Construction Company, Inc. was installing new sewer line and manholes and the originally specified manhole lining had failed. UMC was brought in to assess the failure and come up with a solution. After an on-site inspection it was determined that the original lining could be completely removed and monolithic epoxy lining could be applied. Using this method also allowed UMC to coat all of the exposed piping for corrosion protection.
UMC has completed two separate epoxy lining projects for this client. Both projects consisted of rehabilitation of concrete oil/grease troughs located in their building. High pressure water was used to properly clean the surface before epoxy coating.