Roadway and Highway Engineering
RGA provides complete design and study services related to roadway and highway systems and interchange projects. Our highway design staff is supported by our structural design services. 

Services Include:
(see below for representative projects)

Corridor Location
and
​Conceptual Studies
Highway
Geometrics
​
Structure Width
and
​Length Determination
Turning
Movement
Analysis
Ramp
Design
​
Hydrology/Hydraulics
Studies and
​Design
Construction Plans
and 
​Specifications
Bidding
Services
​
Construction
Administration
​

Contact:

​​Ricardo J.F. Goncalves, ​P.E.

PRESIDENT
​
Direct Line: 303-468-8484
Cell: 303-901-2367
[email protected]


​​​James R. Landry, ​P.E., CWP

CHIEF OPERATING OFFICER
​
Direct Line: 303-468-8482
Cell: 303-901-2444
[email protected]


Gary E. Welp, ​P.E., CFM

SENIOR PROJECT MANAGER
​
Direct Line: 303-468-8484
Cell: 303-901-2447
[email protected]
​​​

Representative Projects
(Click to Open)

Roadway and Highway Engineering

Adams County, Colorado
72nd Avenue Bridge over Burlington Ditch/96th Avenue over O'Brien Canal, Federal Aid Project #C120-015

​The RGA team prepared construction plans, specifications, and estimates for the replacement of two single-span bridges. The project included roadway approach design and, for the 72nd Avenue bridge, the design of new roadways to accommodate a relocation of the bridge. Construction phasing of the bridge replacements was complicated by the year-round flow in the irrigation ditches. 
​

Adams County, Colorado
West 64th Avenue Improvements

​The RGA team designed an expanded roadway section that included storm, water, and sanitary sewer improvements to West 64th Avenue. RGA coordinated and conducted public informational meetings, where feedback from local residents and business owners was integrated into the design process.  RGA also provided project oversight for 14 row takes and 38 temporary construction easement acquisition.  The review agencies having jurisdiction in this area are Urban Drainage Flood Control District, Colorado Department of Transportation, Crestview Water and Sanitation District, and Denver Water. RGA met with, submitted plans to, and obtained approval from all of these agencies.

Albert Frei & Sons, Adams County, Colorado
Deceleration And Acceleration Lane Design

​RGA provided design and construction plans for a deceleration lane on East 88th Avenue and an acceleration lane for Monaco Street in Adams County, Colorado. This work included coordination with survey and geotechnical firms, as well as submittal to and coordination with Adams County.

Albert Frei & Sons, Adams County, Colorado
Roadway Improvements for Kiowa-Bennett Road and East 72nd Avenue

​RGA provided design and construction plans for improvements to Kiowa-Bennett Road and East 72nd Avenue in Adams County, Colorado. 

City of Brighton, Colorado
11th Street Culvert Extension/Chambers Road Bridge Replacement

​The RGA team was part of a design/build team for two structures on 11th Street in the City of Brighton. On 11th Street, our firm designed a 55-foot extension of an existing concrete box culvert, as well as a 37-foot single-span bridge on Chambers Road over the Fulton Ditch.  This bridge was considerably wider than the existing bridge to allow for future widening.  

City and County of Broomfield, Colorado
Lowell Boulevard Improvements at Mountain View Terrace

​RGA provided the design for widening Lowell Boulevard between 125th and 128th to the standard 4-lanel connector section. The work included a geotechnical assessment, pavement design report and a drainage study. RGA performed final design, prepared plans, specifications and bid documents for this project. 

City of Brush!, Colorado
​Hospital Road

RGA prepared construction plans, contract documents, and specifications for approximately 2,250 lineal feet of roadway. The original section of roadway began at Mill Street and ran north to the southern ROW of I-76 and consisted of an approximate 25’-wide asphalt road with road side ditch on both sides. The design replaced the old road with a new 30’-wide concrete roadway, signed and striped as a rural arterial. The project included intersection improvements at Mill Street and appropriate connections at the I-76 interchange. RGA received the Urban Arterials & Collectors award from the American Concrete Pavement Association in 2015 for this project.

City of Dacono, Colorado
Street Rehabilitation Project

​The RGA team provided the design and construction administration for this three phase, three year project.  The project included all water transmission lines, meters, and services; repaving most of the streets, reconstruction of deteriorated curb, gutter, and sidewalk; construction of storm drain facilities; and replacement of most of the sanitary sewer lines in the older portion of the city.  Traffic control, minimizing utility disruption, and public relations were significant construction issues. RGA performed the design, prepared the plans, specifications and bid documents, conducted the bidding process, and provided the construction administration for this three-year, three-phase project. The project consisted of removing and replacing all of the existing asphalt pavement, most of the sidewalk, curb, and gutters, all of the cross pans, installing new handicap ramps and new storm drain inlets and pipes. The project also included replacing all of the water mains and services, installing new meters, and replacing a large portion of the sanitary sewer system.  

City of Sheridan, Colorado
2016 Sheridan Bond Improvement Project

​The 2016 Sheridan Bond Improvement Project (SBIP) included design and construction observation for improvements to roadways and address drainage traffic issues, summarized in the 2012 Capital Improvement Plan. The project consisted of 15,000 linear feet of roadway reconstruction and drainage improvements. Compaction grouting was utilized to efficiently and safely strengthen the subgrade beneath roadways sections over landfill material.  The 2016 zone addressed immediate areas of concern in the City, specifically focusing on West Princeton Place, South Clay Street, South Irving Street, and drainage concerns in the Bottoms Drainage area, located in the northwest corner of South Platter River Drive and highway 285. These projects were designed in early 2016. Construction of the first four (4) projects was completed in late 2016. As part of this work, RGA coordinated with the City of Sheridan, Urban Drainage  and Flood Control District (UDFCD), Metro Wastewater Reclamation District (MWRD), Denver Water, and all utility providers and obtained required clearances and permits. On behalf of the City, RGA produced temporary construction easements and exhibits and met with affected property owners to explain the project and obtain signatures for the temporary construction easements. 

City of Sheridan, Colorado
Irving Street Bridge at Bear Creek project

​The existing outdated 5' wide bridge and abutments were replaced with a prefabricated 10' wide x 70' long steel truss bridge on new abutments cased on steel piles driven to refusal. New approach slabs on each side transitions the existing tail grade to the new bridge deck and vastly improved accessibility from both ends. This project had the challenge of temporarily relocating three (3) overhead utility lines on each side of the creek before construction could start .This was needed in order for the foundation piles to be driven and setting the steel bridge structure. Power to the adjacent properties had to be continuously supplied during the construction. These temporary relocations delayed the start of construction to the winter months where additional winter concreate precautions were implemented to complete the construction. Project costs were monitored and were below the engineer's total estimated cost while completing the project in a timely manner.

City of Sheridan, Colorado
Safety Improvements to Bear Creek Trail Crossing at South Lowell Boulevard

​RGA assisted with the Arapahoe County Open Space planning grant application. With this grant, RGA assisted the City with improving the safety of the crossing of Bear Creek Trail with Lowell Boulevard.  This was achieved through the following infrastructure modifications: realignment of the Bear Creek Trail as it approaches S. Lowell Blvd. from the east; replacement of a portion of the existing 5’ raised sidewalk with an 8’ raised walk on the bridge to accommodate two-way bike and pedestrian traffic; realignment of the intersection of S. King St. and S. Lowell Blvd. which created a rest area with a bike repair station and bench; installation of a raised concrete crossing (speed hump) on S. Lowell Blvd.; installation of truncated domes at the west side of S. Lowell Blvd. and in 3 new curb ramps to meet ADA requirements; and installation of two crossing signs with pedestrian activated rectangular rapid flashing beacons.

City of Sheridan, Colorado
Bear Creek Trail Crossing at South Lowell Boulevard Feasibility Study

​In the spring of 2015, the City of Sheridan was awarded an Arapahoe County Open Space Planning Grant to conduct a feasibility analysis of alternative crossings for the Bear Creek Trail intersection with South Lowell Boulevard. The trail in this area had a difficult, highly dangerous and circuitous crossing of South Lowell Boulevard. The City of Sheridan and RGA completed design surveys, geotechnical evaluation, and preliminary designs to determine alternatives to make this crossing safer. 

City of Sheridan, Colorado
West Oxford Avenue Roadway Rehabilitation

​RGA designed 1,400 LF of a major arterial road in the City of Sheridan that included complete replacement from right-of-way to right-of-way. This included all coordination with the City of Sheridan, Colorado Department of Transportation and utility providers. RGA obtained all required clearances and permits, and completed all necessary documentation.

City of Sheridan, Colorado
City-Wide Street Capital Improvement Plan

​RGA was selected to complete a City-Wide Street Capital Improvement Plan for the City of Sheridan. The purpose of this CIP is to identify, prioritize, and address the City's roadway improvement needs in order to assist the City Council in identifying proposed road maintenance and replacement projects over the next ten years. Each City street was walked, inspected, and measured by an RGA inspector. Inspections included existing pavement conditions, curb, gutter and sidewalk conditions, drainage, traffic and utilities.

City of Sheridan, Colorado
Schools Trail Connection System Project

RGA had the challenge of fitting the concrete trail to existing grades by South Irving Street and the existing drainage gulley, large trees and Denver Water mains at the West Quincy Avenue ROW. This project consisted of the installation of approximately 2,500 linear feet of 10’ wide concrete trail, 140 linear feet of CMP and 95 linear feet of retaining wall as well as miscellaneous signing, railing and grading. Parts of the trail are within a small section of the City of Denver. The rest of the project was within the boundaries of the City of Sheridan. The trail improvements are along South Irving Street between West Quincy Avenue and West Oxford Avenue and along West Quincy Avenue between South Irving Street and South Federal Boulevard. This project provided off-street pedestrian and bike connection between Ora Oliver Elementary School, Sheridan High School, Sheridan Middle School and Alice Terry Elementary School, as well as Alice Terry Park and Sheridan City Park. This project also included coordination and approvals from the City and County of Denver and Fort Logan Officials.

Colorado Technology Center, Louisville, Colorado
Dillon Road and 104th Street Improvements

​This roadway rehabilitation and improvement project that amounted to more than $2,200,000 and consisted of approximately 4,000 LF of roadway and 4,500 LF or curb, gutter, and sidewalk.  The project required the construction of a portion of Urban Drainage Flood Control District Drainageway G, adjacent to this site, and consisted of 5,000 LF of drainageway channel, two major culvert crossings, and three grouted boulder drop structures.  The RGA team provided the design and construction administration for the project and coordinated the approvals with the City of Louisville, Urban Drainage Flood Control District, concurrent lift station design, and various utility companies. 

Crestview Water and Sanitation District, Denver, Colorado
Goat Hill Phase IIB Waterline Replacement

​The RGA team, working in conjunction with an Adams County roadway replacement project, provided design, contract bidding documents, construction management, and observation for 5,600 LF of 6-inch and 8-inch PVC watermain and lateral tie-ins, and 119 water services and meter pit relocations.  The project also included design and construction of street, sidewalk, and drainage improvements.

Lincoln Park Metropolitan District, Douglas County, Colorado
2019 Roadway Repairs Project

​The RGA team assisted with the transfer of ownership for all district roadways to Douglas County. This project included contract document creation and bidding and construction administration for all improvements to the roadways, sidewalks, cross plans and curb and gutter. 

Lincoln Park Metropolitan District, Douglas County, Colorado
2018 Roadway Assessment

​RGA was selected by the District to complete a Roadway Assessment. The purpose of this assessment was to identify, prioritize, and address the District’s roadway improvement needs to assist the District in identifying proposed road maintenance and replacement projects for maintenance needs and in some cases, to prepare the roadways for eventual transfer to Douglas County.

Rocky Mountain High Development, Rio Grande County, Colorado
Flying W Ranch - Access in CDOT Right-of-Way and Gravel Access Road Extension

​RGA prepared construction plans and contract documents and handled construction administration for access to Flying W Ranch from State Highway 160 and extension of the gravel access road on the property. This work included coordination with Colorado Department of Transportation (CDOT) for an Access Permit, Notice to Proceed and culvert installation and coordination with San Luis & Rio Grande Railroad Company for a railroad crossing.

Stonegate Village Metropolitan District, Douglas County, Colorado
Chambers Road Extension

​The RGA team provided the design and construction management for the extension of approximately 1,300 LF of Chambers Road from Lincoln Avenue to a new high school.  Chambers Road is a 4-lane arterial street, and the project included the design of a full signalized intersection with acceleration/deceleration and left turn lanes at the intersection of Chambers Road and Lincoln Avenue.  Lincoln Avenue is a 4-lane major arterial street.  The project included the extension of 60” drainage culverts, inlets, and a 24” storm drain system.  The outlet system required Urban Drainage Flood Control District review and approval.  The project required coordination and approval by Douglas County.

Stonegate Village Metropolitan District, Douglas County, Colorado
Stonegate Parkway

​The RGA team provided the design and construction management for the construction of approximately 5,500 LF of divided arterial roadway connecting Jordan Road to Chambers Road in Douglas County.  Project elements included grading, paving, storm drain system, pedestrian paths, and landscaping.  This project also included a concrete pedestrian underpass and the installation of water and transmission and sanitary sewer collection mains.  The RGA team provided grading, paving, curb and gutter, storm sewer, and water transmission line for 4,300 LF of collector roadway. The project included construction of a single-span prestressed concrete bridge.

Town of Buena Vista, Colorado
Roadway Improvements Project: Railroad Street

​The RGA team provided work on Railroad Street within the Town of Buena Vista that included both roadway improvements, intersection re-design and drainage improvements. RGA has incorporated several innovative drainage solutions that range from gutter “turnouts” that direct stormwater to tree lawns to capture runoff before it reaches the street; open bottom infiltration inlets; infiltration galleries in the gutter pans; and roadside ditches that capture and treat water via longitudinal gravel beds and the use of roadside ditches as linear detention/water quality facilities.  

Town of Buena Vista, Colorado
Roadway Improvements Project: Gregg Drive, Arkansas Street, South and East Main Street and Cedar Street, and Rodeo Road

The RGA team provided work on several projects within the Town of Buena Vista that include both roadway improvements and drainage master planning. RGA has incorporated several innovative drainage solutions that range from gutter “turnouts” that direct stormwater to tree lawns to capture runoff before it reaches the street; open bottom infiltration inlets; infiltration galleries in the gutter pans; and roadside ditches that capture and treat water via longitudinal gravel beds and the use of roadside ditches as linear detention/water quality facilities.  

Town of Castle Rock, Colorado
Meadows A7 Well Facility

​The Meadows A7 Well Facility is one of many well facilities that provides water for the Town of Castle Rock.  The facility has three (3) non-tributary deep wells that pump from the Dawson, Denver, and Arapahoe aquifers of the Denver basin. The RGA team prepared the design and construction documents, and provided construction-related engineering services for this project, which was completed in June of 2009.  The facility includes medium voltage (2,250 V) well pumps with variable frequency drives.  A masonry facility building houses hydraulic control equipment, electrical equipment, control systems, and instrumentation systems.  Construction included extensive site grading, buried piping, asphalt access road, erosion control systems, and sediment control mitigation.  

Town of Del Norte, Colorado
Grande Avenue Revitalization

RGA assisted the town with preliminary design plans for the Grande Avenue Revitalization Project. This work included coordination with survey firm for a design survey of the street, and design inclusive of preliminary plans, profiles, and cross sections. RGA prepared preliminary cost estimates and planned coordination with utility companies for clearance letters. 

Town of Estes Park, Colorado
Bond Phase Phases I and III

​RGA provided the engineering design for storm sewer, channelization and infiltration system to eliminate existing drainage problems; replacing asphalt; incorporating parking delineation in decorative stone pattern to eliminate typical painted stripes; eliminating curb and gutter; rock boulder bollards; and flowing curvilinear roadway, sidewalks and planter beds. This project included roadway, drainage, landscape, and streetscape improvements. The work included Macgregor Drive which is directly west of Town Hall. RGA and Winston Associates worked closely with the Stakeholder Committee and Town Staff to complete a detailed design for Phases I and III that was on time, within budget, functional, high-quality, and integrates seamlessly with Estes Parks’ downtown.

Town of Estes Park, Colorado
2013 Flood Repair Project

​This project consisted of 22 separate repair areas. Work included establishing construction easements, survey pins, repairs and replacements for roadways, trails, retaining walls, repairs to asphalt, concrete, bridges, swales, embankments, and slope and bank stabilization. RGA provided design services including survey, geotechnical and environmental reports and evaluations. RGA produced design plans, contract documents, cost estimates, and has advertised, bidding services and full-time construction management for the town. As part of this work, RGA coordinated with the Town of Estes Park, CDOT, FEMA, all utility providers and obtained required clearances and permits. On behalf of the Town, RGA produced temporary construction easements and exhibits and met with affected property owners to explain the project and obtain signatures for the temporary construction easements. RGA assisted the Town with quarterly reports, scope change requests, and documentation for entry into the EMGrantsPro system. In addition, RGA assisted the Town to ensure that all work complied with the Town of Estes Park, CDOT, FHWA and FEMA requirements and regulations.

Town of Kersey, Colorado
​9th Street Rehabilitation

​The RGA team provided design and construction administration to the Town of Kersey.  9th Street is an arterial street that provides access to two (2) state highways.  Platte Valley High School is adjacent to the street and was beginning improvements to its stadium.  RGA coordinated with the school and designed street improvements that included an additional traffic lane with parking turnouts, curbs, gutters, walks, and speed control features.  The project also included drainage inlets and outfall facilities.  

Town of Kiowa, Colorado
Highway 86 Improvements

​RGA assisted the town with sidewalk, parking, drainage, landscaping and lighting along Colorado Highway 86, from CR 45 to Arapahoe Street. RGA also assisted the town with obtaining all data collection for the project, inclusive of photos, citizen input meetings, and a city-wide survey. Lastly, this work included the creation of a base map, evaluation and preliminary cost estimates for improvements, and a report detailing town-accepted improvement options with mapping.

Town of Kremmling, Colorado
ARRA-Funded Road and Water System Improvements

The RGA team served as project manager, design engineer, and construction administrator for two (2) miles of waterline and roadway replacement.

Town of Mountain View, Colorado
2019 Roadway Drainage Project

​RGA evaluated videos for sanitary sewer, made assessments on pipe condition, and provided a Capital Improvements Plan that recommends both cured-in-place point repair and cured-in place lining of portions of the system along with excavated repairs in some areas. RGA provided bid documents for the design of 11 point repairs with 8” PVC (Approximately 600 LF); 2 manhole locates/raisings; approximately 4750 LF of 8” Cured-in-place liner with service reconnections; 6 Manhole modifications; 24 manhole linings; 19 protruding tap removals; concrete repair and asphalt patch paving. 

Town of Mountain View, Colorado
Streets, Curb & Gutter and Storm Assessment Project

RGA was retained to complete an assessment of existing roadway pavement, curb and gutter and storm drainage system conditions for the Town of Mountain View. The purpose of the assessment was to identify, prioritize and recommend roadway improvements to assist the Town Council in identifying proposed road maintenance and replacement projects over the next ten years.

Town of Nederland, Colorado
September 2013 Flood Repair Project

​This project consisted of 7 separate repair areas. Work included replacements for roadways, culverts, repairs to road surface, swales, and slope and bank stabilization.  RGA is familiar with the latest versions CDOT Local Agency Manual, CDOT Construction Manual, CDOT Field Materials Manual and the procedures associated with maintaining compliance for FHWA, FEMA and CDOT funded projects. RGA has a great working relationship with FEMA and a comprehensive understanding of the process and procedures that need to be followed in order to maintain compliance and ultimately funding.

Town of Red Cliff, Colorado
Streetscape Design

​RGA performed preliminary streetscape design work for the intersection of Turkey Creek Road and Eagle Street. This project was designed in order to obtain community input on potential improvements and indicate a feasible design that works with the town’s small street width and limited sidewalk area. Potential streetscape concept items such as street lights, planters, benches, “bump-outs”, and trash cans were presented graphically and also “live” on-site for the community to better understand how these enhancements would look and work in-person. This was done at of the 2018 Community Unity Day, and facilitated by our staff. 

Town of Superior, Colorado
​Rock Creek Parkway and 88th Street Roundabout

This project involved the design and construction management of a previously signalized intersection.  The traffic signal was removed and replaced with a two-lane roundabout at the intersection of Rock Creek Parkway (four lanes) and 88th Street (two lanes).  The project also included major drainage improvements, an extensive retaining wall, patterned asphalt thermoplastic treated crosswalks, street lights, pedestrian lights, and landscaping.  Since the roundabout was completed, vehicular incidents have been dramatically reduced.

Town of Superior, Colorado
​Coal Creek Drive Roadway and Utility Improvements

The RGA team designed and managed the reconstruction of approximately 1,800 LF of Coal Creek Drive, an area located in the historic “Original Town” part of Superior.  Improvements included the removal of existing asphalt pavement and utilities, and construction of new asphalt, concrete curb, gutter, and sidewalk, sewer and water stub-outs, and a re-use irrigation system.  Construction proceeded in phases to minimize disruption to residents and local businesses.  The project also included extensive landscaping to upgrade the area’s aesthetic, while maintaining the historic feel of Original Town.   The RGA team designed and managed the reconstruction of approximately 1,800 LF of Coal Creek Drive, an area located in the historic part of Superior. Improvements included the removal of existing asphalt pavement and utilities and construction of new asphalt, concrete curb, gutter, and sidewalk, sewer and water stub-outs, and a re-use irrigation system. Construction proceeded in phases to minimize disruption to residents and local businesses. The project also included extensive landscaping to upgrade the area’s aesthetic, while maintaining the historic feel of Original Town.