Since 1991, the firm has been bringing decades of engineering and construction experience to our customer's projects. As a professional company, and as individuals, we strive to provide excellence in our service to our customers.

Construction

  • Site Excavation and Grating
  • Overlot Grading
  • Waterlines
  • Sanitary Sewers
  • Storm Sewers
  • Electrical Duct Banks
  • Erosion Control Systems
  • Structure Demolition
  • Building Demolition
  • Aerospace Specialty Earthwork
  • Aerospace Demolition
  • Site Preparation Contractors
  • Roadways and Paving

Engineering

  • Phase I Environmental Site Assessments
  • Phase II Environmental Site Assessments
  • Construction De-Watering Permit Assistance
  • Treatment of Water for Discharge
  • Hydrogeologic Investigations

Projects

E-21 provided engineering services for the demolition of the 2-million square foot Cinderella City Shopping Mall and surrounding concrete parking structures. Work included measurement and estimation of in-place concrete volumes, structural engineering evaluation of columns damaged during demolition, and quantification of recycled concrete stockpiles.

Cinderella City Demolition, Remediation, and Site Redevelopment

Location:  801 West Hampden Avenue Englewood, Colorado

Work Provided:  Demolition

Size:  45 Acres

Owner/ Client:  Englewood Environmental Foundation

Prime Contractor:  LVI Environmental, Inc.

Project Description:  E-21 provided demolition services across 2-million square feet at the Cinderella City Shopping Mall and surrounding concrete parking structures. Work included measurement and estimation of in-place concrete volumes, structural engineering evaluation of columns damaged during demolition, and quantification of recycled concrete stockpiles.

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McLellan Properties Development

Location:  Highway C-470 and Lucent Boulevard, Highlands Ranch, Colorado

Work Provided:  Overlot Grading with Permitting and Stormwater Controls

Size:  120 Acres

Owner/ Client:  Englewood McLellan Reservoir Foundation

Prime Contractor:  E-21 Construction

Project Description:  E-21 provided complete permitting and construction services for the overlot grading and construction of storm sewers for the development of six large parcels of land totaling approximately 120 acres.  The properties are located immediately around the intersection of Colorado Highway C-470 and Lucent Boulevard.  Work included filling and grading a site for the proposed RTD Light Rail Station at Highlands Ranch.

E-21 obtained stormwater and grading permits from the State of Colorado and Douglas County, excavation and export of 370,000 cubic yards of excess soil, excavation and compacted placement of 230,000 cubic yards and construction services.  This multi-million dollar project also included installation of 36-inch storm sewers up to 35-feet deep and installing a 30-inch PVC storm pipe under Lucent Boulevard by trenchless boring methods.

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City Park South Redevelopment

Location:  16th Avenue and Fillmore Street, Denver, Colorado

Size:  2+ city blocks

Owner/ Client:  CPS Investments, LLC, Allied Realty, Wonderland Homes

Prime Contractor:  Alpine Demolition, Inc., Allied Construction, Wonderland Homes

Project Description:  E-21 provided site redevelopment and earthwork services to several prime contractors for a two-block area at the southeast corner of the intersection of 17th Avenue and Fillmore Street in Denver and on the south side of Denver’s City Park.  Work included the excavation and backfilling of foundations associated with previously existing structures, engineering of building support for buildings located proximal to the redeveloped area, mass excavation and export for underground parking garages, subgrade over-excavation and recompacting, backfilling, final grading to plans, and ancillary support for complete area redevelopment.

E-21 also provided demolition services and storm water permitting and other services to the site developer under several separate contacts at this site.