Keystone Construction Co.
Maple Valley, WA 98038
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Our Story
Keystone Construction Co. has been in business since 1997.
Our main lines of business include: Concrete Contrs.--Reinforced Concrete, Concrete--Post-Tensioning, Concrete--Precast-Arch. & Struct..
We are located in the Maple Valley, Washington area.
Commercial Experience
Education (K-12)
Residential Building
Arena / Stadium
Bridge
Design Build
Gas Station
Jail / Prison
Mixed Use
Parking Garage
Parking Lots
Retail Store
Road / Highway
Storage Facility / Warehouse
Theater
Tunnel
Utilities
Regions & Counties Serviced
Washington 18
- Clallam
- Clark
- Cowlitz
- Grays Harbor
- Island
- Jefferson
- King
- Kitsap
- Lewis
- Mason
- Pacific
- Pierce
- San Juan
- Skagit
- Snohomish
- Thurston
- Wahkiakum
- Whatcom
Our CSI Codes
03 01 20 - Maintenance of Concrete Reinforcing
03 01 23 - Maintenance of Stressing Tendons
03 01 30 - Maintenance of Cast-in-Place Concrete
03 01 30.72 - Strengthening of Cast-in-Place Concrete
03 01 40 - Maintenance of Precast Concrete
03 01 40.72 - Strengthening of Precast Concrete
03 01 70 - Maintenance of Mass Concrete
03 06 20 - Schedules for Concrete Reinforcing
03 06 20.13 - Concrete Beam Reinforcing Schedule
03 06 20.16 - Concrete Slab Reinforcing Schedule
03 06 30 - Schedules for Cast-in-Place Concrete
03 06 30.13 - Concrete Footing Schedule
03 06 30.16 - Concrete Column Schedule
03 06 30.19 - Concrete Slab Schedule
03 06 30.26 - Concrete Beam Schedule
03 06 40 - Schedules for Precast Concrete
03 06 40.13 - Precast Concrete Panel Schedule
03 06 70 - Schedules for Mass Concrete
03 11 13.13 - Concrete Slip Forming
03 23 00.00.01 - Stressing Tendons
03 24 00.00.01 - Fibrous Reinforcing
03 30 53 - Miscellaneous Cast-in-Place Concrete
03 31 13 - Heavyweight Structural Concrete
03 31 23 - High-Performance Structural Concrete
03 33 13 - Heavyweight Architectural Concrete
03 35 23 - Exposed Aggregate Concrete Finishing
03 35 26 - Grooved Concrete Surface Finishing
03 38 13 - Post-Tensioned Concrete Preparation
03 38 16 - Unbonded Post-Tensioned Concrete
03 38 19 - Bonded Post-Tensioned Concrete
03 40 00.00.01 - Precast Concrete
03 41 13 - Precast Concrete Hollow Core Planks
03 41 16 - Precast Concrete Slabs
03 41 23 - Precast Concrete Stairs
03 41 33 - Precast Structural Pretensioned Concrete
03 41 36 - Precast Structural Post-Tensioned Concrete
03 45 13 - Faced Architectural Precast Concrete
03 45 33 - Precast Architectural Pretensioned Concrete
03 45 36 - Precast Architectural Post-Tensioned Concrete
03 47 13 - Tilt-Up Concrete
03 48 16 - Precast Concrete Splash Blocks
03 48 19 - Precast Concrete Stair Treads
03 48 43 - Precast Concrete Trim
03 49 13 - Glass-Fiber-Reinforced Concrete Column Covers
03 49 16 - Glass-Fiber-Reinforced Concrete Spandrels
03 49 43 - Glass-Fiber-Reinforced Concrete Trim
03 70 00.00.01 - Mass Concrete
03 71 00.00.01 - Mass Concrete for Raft Foundations
03 72 00.00.01 - Mass Concrete for Dams
06 01 80.51 - Composite Cleaning
06 01 80.91 - Composite Restoration
23 31 16.26 - Concrete Ducts
31 53 13 - Timber Cribwork
32 06 30.13 - Retaining Wall Schedule
32 14 13.16 - Precast Concrete Unit Paving Slabs
32 16 13.13 - Cast-In-Place Concrete Curbs and Gutters
32 16 13.16 - Cast-In-Place Concrete Curbs
32 16 13.19 - Cast-In-Place Concrete Gutters
32 32 13 - Cast-in-Place Concrete Retaining Walls
32 32 16 - Precast Concrete Retaining Walls
32 32 19 - Unit Masonry Retaining Walls
32 32 23 - Segmental Retaining Walls
32 32 23.13 - Segmental Concrete Unit Masonry Retaining Walls
32 32 26 - Metal Crib Retaining Walls
32 32 29 - Timber Retaining Walls
32 32 36 - Gabion Retaining Walls
32 32 43 - Soldier-Beam Retaining Walls
35 01 70 - Operation and Maintenance of Dams
35 05 70 - Common Work Results for Dams
35 06 70 - Schedules for Dams
35 31 16.16 - Segmental Seawalls
35 42 53.16 - Concrete Unit Masonry Wall Bank Protection
35 42 53.19 - Segmental Wall Bank Protection
35 42 53.40 - Stone Wall Bank Protection
35 43 53 - Wall Scour Protection
35 43 53.13 - Concrete Unit Masonry Wall Scour Protection
35 43 53.16 - Segmental Wall Scour Protection
35 43 53.40 - Stone Wall Scour Protection
35 49 13 - Floodwalls
35 49 13.13 - Concrete Floodwalls
35 70 00.00.01 - Dam Construction and Equipment
35 71 13 - Concrete Gravity Dams
35 71 16 - Masonry Gravity Dams
35 72 13 - Concrete Arch Dams
35 74 13 - Concrete Buttress Dams
