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Our Story
MSI is regularly involved in projects throughout Washington, Oregon and Alaska. We are licensed in Alaska, Washington, Oregon, and California.
WA License #MCCLUSI101MJ
OR License #71127
AK License #20829
CA License #726477
President Les McClure, with over 45 years of construction experience, leads a team of talented, multi-disciplined construction managers with a wealth of knowledge and experience in all aspects of industrial construction, including heavy mechanical, process piping, and conveyor systems.
Founded with family in mind, we are proud that a second generation of McClures has chosen to join the firm and welcome the addition of two of the McClure sons to the company. The MSI family is equally proud of the third McClure son, who chose to pursue his athletic career, and became a Silver Medalist in Men’s Gymnastics at the 2004 Olympic Games in Athens.
It is our promise and our legacy to continue to provide quality and service in the following areas:
Waste Water Treatment Plants
Fresh Water Treatment Plants
Fabricated Precast Concrete
Pump Stations
Barge & Ship Retrofitting
Marine Construction
Ferry Terminals
Marina Construction
Shoring
Bridges
Industrial Facilities
Miscellaneous Facilities
Water Reservoirs
Water Tanks
Fish Hatcheries
Dams
Mechanical
Design-Build
Commercial Experience
Regions & Counties Serviced
- Seattle
Alaska All
California All
Idaho All
Oregon All
Washington All
Our CSI Codes
01 35 16 - Alteration Project Procedures
22 01 60 - Operation and Maintenance of Laboratory and Healthcare Systems
22 06 60 - Schedules for Laboratory and Healthcare Systems
22 11 13 - Facility Water Distribution Piping
22 13 23 - Sanitary Waste Interceptors
22 13 26 - Sanitary Waste Separators
22 13 29.33 - Sewerage Pump Basins and Pits
22 13 36 - Packaged, Wastewater Pump Units
22 13 43 - Facility Packaged Sewage Pumping Stations
22 13 43.13 - Facility Dry-Well Packaged Sewage Pumping Stations
22 13 43.16 - Facility Wet-Well Packaged Sewage Pumping Stations
22 14 29.19 - Sump-Pump Basins and Pits
22 15 13 - General Service Compressed-Air Piping
22 60 00.00.01 - Gas and Vacuum Systems for Laboratory and Healthcare Facilities
22 61 13 - Compressed-Air Piping for Laboratory and Healthcare Facilities
22 61 13.53 - Laboratory Compressed-Air Piping
22 61 13.70 - Healthcare Compressed-Air Piping
22 61 13.74 - Dental Compressed-Air Piping
22 61 19.70 - Healthcare Compressed-Air Equipment
22 62 13 - Vacuum Piping for Laboratory and Healthcare Facilities
22 62 13.53 - Laboratory Vacuum Piping
22 62 13.70 - Healthcare, Surgical Vacuum Piping
22 62 13.74 - Dental Vacuum Piping
22 62 23 - Waste Anesthesia-Gas Piping
22 63 13 - Gas Piping for Laboratory and Healthcare Facilities
22 63 13.53 - Laboratory Gas Piping
22 63 13.70 - Healthcare Gas Piping
22 66 53 - Laboratory Chemical-Waste and Vent Piping
22 66 70 - Healthcare Chemical-Waste and Vent Piping
22 66 83 - Chemical-Waste Tanks
22 67 13 - Processed Water Piping for Laboratory and Healthcare Facilities
22 67 13.13 - Distilled-Water Piping
23 06 10 - Schedules for Facility Fuel Service Systems
23 10 00.00.01 - Facility Fuel Systems
23 11 13 - Facility Fuel-Oil Piping
23 11 23 - Facility Natural-Gas Piping
23 21 13.23 - Aboveground Hydronic Piping
23 22 13 - Steam and Condensate Heating Piping
23 22 13.23 - Aboveground Steam and Condensate Heating Piping
23 24 16 - Internal-Combustion Engine Exhaust Piping
33 12 23 - Water Utility Pumping Stations
33 32 13 - Packaged Utility Lift Stations
33 32 13.13 - Packaged Sewage Lift Stations, Wet Well Type
33 32 16 - Packaged Utility Wastewater Pumping Stations
33 32 16.13 - Packaged Sewage Grinder Pumping Units
33 32 19 - Public Utility Wastewater Pumping Stations
40 01 10 - Operation and Maintenance of Gas and Vapor Process Piping
40 01 20 - Operation and Maintenance of Liquids Process Piping
40 01 40 - Operation and Maintenance of Process Piping and Equipment Protection
40 05 13 - Common Work Results for Process Piping
40 05 13.13 - Steel Process Piping
40 05 13.16 - Lined or Internally-Coated Steel Process Piping
40 05 13.19 - Stainless-Steel Process Piping
40 05 13.23 - Aluminum Alloys Process Piping
40 05 13.33 - Brass, Bronze, Copper, and Copper Alloys Process Piping
40 05 13.43 - Nickel and Nickel Alloys Process Piping
40 05 13.53 - Ductile, Malleable, and Cast Iron Alloys Process Piping
40 05 13.63 - Titanium and Titanium Alloys Process Piping
40 05 13.73 - Plastic Process Piping
40 05 13.76 - Fiberglass-Reinforced Plastic and Resins Process Piping
40 05 13.93 - Other Metals Process Piping
40 06 10 - Schedules for Gas and Vapor Process Piping
40 06 20 - Schedules for Liquids Process Piping
40 06 30 - Schedules for Solid and Mixed Materials Piping and Chutes
40 06 40 - Schedules for Process Piping and Equipment Protection
40 10 00.00.01 - Gas and Vapor Process Piping
40 11 13 - Low-Pressure Steam Process Piping
40 11 16 - Intermediate-Pressure Steam Process Piping
40 11 19 - High-Pressure Steam Process Piping
40 11 23 - Condensate Process Piping
40 12 13 - Breathing Compressed Air Process Piping
40 12 16 - Non-Breathing Compressed Air Process Piping
40 13 13 - Argon Process Piping
40 13 16 - Carbon-Dioxide Process Piping
40 13 19 - Helium Process Piping
40 13 23 - Krypton Process Piping
40 13 26 - Neon Process Piping
40 13 29 - Nitrogen Process Piping
40 13 33 - Xenon Process Piping
40 13 93 - Mixed Inert Gases Process Piping
40 14 16 - Blue (Water) Fuel Gas Piping
40 14 19 - Butane Piping
40 14 23 - Carbon-Monoxide Piping
40 14 26 - Chlorine Fuel Gas Piping
40 14 33 - Ethane-Gas Piping
40 14 36 - Hydrogen Fuel Gas Piping
40 14 39 - Liquid Natural-Gas Process Piping
40 14 43 - Methylacetylene-Propadiene Fuel Gas Piping
40 14 49 - Natural-Gas Process Piping
40 14 49.13 - Synthetic Natural-Gas Piping
40 14 49.23 - Propane-Air Mixes Fuel Gas Piping
40 14 53 - Octane Fuel Gas Piping
40 14 59 - Propane Fuel Gas Process Piping
40 14 63 - Sewage Fuel Gas Piping
40 14 93 - Mixed Fuel Gases Piping
40 15 13 - Combustion Air Piping
40 15 16 - Oxygen Combustion System Gas Piping
40 15 23 - Exothermic-Gas Combustion System Piping
40 15 26 - Endothermic-Gas Combustion System Piping
40 15 29 - Disassociated-Ammonia-Gas Combustion System Piping
40 16 13 - Ammonia Gas Piping
40 16 16 - Boron Gas Piping
40 16 26 - Diborane Gas Piping
40 16 29 - Fluorine Gas Piping
40 16 33 - Hydrogen Sulfide Gas Piping
40 16 36 - Nitrous-Oxide Gas Process Piping
40 16 39 - Ozone Gas Piping
40 16 43 - Phosphine Gas Piping
40 16 46 - Silane Gas Piping
40 16 49 - Sulfur-Dioxide Gas Piping
40 16 53 - Specialty Gas Mixtures Piping
40 18 13 - Low-Vacuum Systems Process Piping
40 18 16 - High-Vacuum Systems Process Piping
40 20 00.00.01 - Liquids Process Piping
40 21 13 - Bio Fuels Process Piping
40 22 16 - Light-Fractions Petroleum Products Piping
40 23 13 - De-Ionized Water Process Piping
40 23 16 - Distilled-Water Process Piping
40 23 19 - Process Plant Water Piping
40 23 23 - Potable Water Process Piping
40 23 29 - Recirculated Water Process Piping
40 23 33 - Reverse-Osmosis Water Process Piping
40 24 13 - Alcohol Piping
40 24 16 - Gel Piping
40 24 19 - Slurries Process Piping
40 24 23 - Thixotropic Liquid Piping
40 25 13 - Liquid Acids Piping
40 25 16 - Liquid Bases Piping
40 26 00.00.01 - Liquid Polymer Piping
41 14 16 - Batch Cars/Transports
41 14 19 - Batch Hoppers
44 41 13 - Packaged Water Treatment Plants
44 41 13.13 - Chemical Packaged Water Treatment Plants
44 41 13.16 - Biological Packaged Water Treatment Plants
44 41 13.19 - Thermal Packaged Water Treatment Plants
44 46 26 - Sludge Thickeners
