expertise

Depot Roadhouse, Boulder
1973 Drexel Barrell survey on display in the Roadhouse Boulder Depot restaurant, a repurposing of the historic Boulder Train Depot built in 1890. Drexel Barrell provided this survey after the building’s relocation from downtown to the original Boulder County Fairgrounds site on the northwest corner of 30th and Pearl. In 2008, the depot moved for the second time to the current location in Boulder Junction, a few blocks east.

Drexel Barrell’s Expertise

SURVEYING

We started as surveyors in 1949 and land surveying, geomatics, and related services are still an integral part our business today. In fact, most of our projects start and end with surveying. We provide boundary and topographic design surveys at the beginning of a project. Our engineers design the infrastructure, and often contractors call upon our surveyors to provide accurate and precise construction staking so that the project is built in the right location and at the correct elevations. Finally, many agencies and clients contract with us to provide "as-builts" at completion to have a record set for future reference.

Drexel Barrell pioneered the use of GPS surveying in Colorado in the 1990's. Our "firsts" include establishing survey control in 1992 for reconstruction of the I-25 / 6th Avenue Interchange for CDOT; conducting the first GPS survey to the summit of Pike's Peak, including the Pikes Peak Highway from Manitou Springs; and in 1999 conducting an all GPS survey of the National Railway Test Center tracks in Pueblo in record time, which allowed final evaluations of the 150-mph Acela passenger rail before deployment to the Washington DC-New York City-Boston Corridor.

Our Surveying services include:

Boundary and ALTA surveys Topographic and design surveys
Annexation and zoning maps Subdivision and condominium plats, legal descriptions, and recorded exemptions
Right-of-way legal descriptions, mapping, and exhibits Building height and floodplain certification surveys
Construction staking As-constructed / as-built surveys
Building settlement monitoring Bathymetric (lake and river bottom topography) surveys

CIVIL / SITE INFRASTRUCTURE ENGINEERING

With the addition of engineer Bob Barrell in 1964, Drexel Barrell offered civil engineering services to our many clients. Our engineering portfolio has grown steadily over the succeeding years to accommodate public and private sector clients across Colorado.

Our Civil and Site Infrastructure engineering services include:

Pedestrian, bicycle, and vehicular access, parking, and circulation Horizontal control plans
Grading and drainage plans Water, sewer, and storm utility plan and profile design
Detention pond, metered outlet works, and storm channel design Drainage studies
Construction cost estimating, bid documents, and bidding assistance Construction inspection and observation, closeout, punchlists, and as-builts

WATER RESOURCES ENGINEERING

Since 1993, Drexel Barrell has offered hydrology and hydraulics engineering to public and private sector clients.

Our Water Resources capabilities include:

Drainage basin hydrology, hydraulics, and planning studies Regional detention pond planning and design
FEMA floodplain determinations, certifications, mapping, and Letters of Map Revision (CLOMR and LOMR) Reservoir and dam design and rehabilitation
Bridge and culvert hydraulics and scour analyses Storm sewer outfall and regional detention storage / water quality design
Pump station and force main design Water distribution network hydraulic modeling
Large diameter water, sewer, and storm pipeline design

TRANSPORTATION AND TRAFFIC ENGINEERING

Also since 1993, Drexel Barrell has offered transportation and traffic engineering services.

Our Transportation and Traffic Engineering services include:

Traffic impact studies Street and highway design
Hazard Elimination Safety (HES) design FHWA-funded Safe Routes to School design
Accel / decel lane design Intersection and traffic signal design
Signalized pedestrian crossings Pedestrian and bicycle trails, and highway underpass design
Vehicle and pedestrian bridge design CDOT Highway Access Permit processing and approvals
CDOT and railroad utility tunneling / boring design and approvals Signing and striping / pavement marking plans

Our Services and Expertise

Valmont Bridge and Underpass, Boulder Creek

Our services include land surveying, civil engineering, site infrastructure design, transportation and traffic engineering, water and wastewater engineering, floodplain studies, construction engineering, surveying, and inspection. This comprehensive approach allows Drexel Barrell to provide our clients with an A to Z range of services.

By offering technical expertise from design surveys through final construction inspection and acceptance, the client has one source of responsibility for project decisions and follow-through.

Surveying in Mesa County
Surveying in Mesa County.

Surveying in Mesa County
US Forest Service Survey Monument.

Waterline Installation, Downtown Westminster Development
Waterline Installation, Downtown Westminster Development

Storm Sewer Construction, Downtown Westminster Development
Storm Sewer Construction, Downtown Westminster Development

Fountain Creek LOMR, El Paso County
Fountain Creek LOMR, El Paso County

Fruita Reservoir No. 1 Reconstruction Design, Mesa County
Fruita Reservoir No. 1 Reconstruction Design, Mesa County

Woodgate Road Improvements, Montrose
Woodgate Road Improvements, Montrose

South Platte River Trail and Bridges, Adams County
South Platte River Trail and Bridges, Adams County