Project Summary

Cobb Engineering Company (CEC), in association with Alaback Design Associates furnished professional engineering and landscape architectural services for Main Street enhancements in Owasso, OK between 76th Street north and Third Street.  Conceptual Design and Phase I construction of the project was funded by Tulsa County’s Vision 2025 sales tax increase approved by voters in September, 2003.  Additional funding is required to complete Phase II.

Design Features
Phase I of this project has been broken down into six tasks including the following:
Task I – Conceptual Design, for the entire project, including 76th Street North and Main Intersection through 3rd Street and Main Intersection
Task 2 – Construction Drawings, Phase I, from 76th Street North along Main through Broadway and Main Intersection
Task 3 – Bidding and Contracting, Phase I
Task 4 – Construction Services, Phase I
Task 5 – Topographic Survey, entire Project
Task 6 – Overhead Utility Relocation Coordination

Project Summary

Cobb Engineering Company provided rehabilitation plans for Maintenance Zone 9043 for the City of Tulsa. Maintenance Zone 9043 is bounded by the Arkansas River to the west, E. 41st St. S. to the north, S. Lewis E. Ave. to the east and I-44 to the south. This project consisted of rehabilitation of 8 areas in this zone. Areas 1 and 2 included asphalt mill and overlays at Detroit Ave. and E. 46th St. S. and E. 45th Ct. S. Areas 3, 4 and 5 were reconstruction of concrete roadways with curb and gutter, sidewalks and storm sewer design in some areas. Area 3 included E. 45th Pl. S. between S. Madison Pl. and S. Peoria Ave. Area 4 included E. 42nd Pl. S. and E. 43rd St. S. between S. Peoria Ave. and S. Rockford Ave. Area 5 included E. 45th Pl. S. between S. Rockford Ave. and S. St. Louis Ave. Area 6 is asphalt pavement reconstruction of E. 45th Pl. S. west of S. Victor Ave. Area 6 also included 437 linear feet of 6” water line. Area 7 included asphalt mill and overlay of E. 43rd St. S. between S. Victor Ave. and S. Oak Rd. Area 8 included asphalt pavement reconstruction of E. 48th St. S. east of S. Yorktown Pl. and asphalt mill and overlay of S. Yorktown Pl. north of E. 48th St. S. Area 8 also included 373 linear feet of 6” water line.

Cobb provided the following services:
•    Survey
•    Roadway Design
•    Drainage Design
•    Water Line Design
•    Construction Administration
•    As-Built Drawings

Project Summary

The project consists of the rehabilitation of concrete pavement, replacement of water line and rehabilitation of sanitary sewer lines on approximately 4,200 lineal feet of Southwest Boulevard, from 23rd Street north to the Arkansas River Bridge.  This project is on “Historic Route 66” and as such, special commemorative plaques are placed in the sidewalks on both sides of the street.  The existing concrete street was constructed in the late 1930’s.  The pavement rehabilitation consisted mainly of removing failed panels and replacing failed joints.

Professional services provided included design engineering, design survey, and geotechnical testing via sub-consultant.

Project Summary

Cobb Engineering Company provided engineering design services for rehabilitation of the south leg of the City of Tulsa Inner-Dispersal Loop.  The project included reconstruction of the existing US-75 pavement and re-decking and repairs to two bridges at the I-244 interchange.  It also included re-decking and substructure repairs to the mainline bridges over Houston Avenue and the eastbound on-ramp bridge over Houston Avenue.

The project design consisted of removing and replacing all pavements within the limits of construction and included adjusting drainage structures to grade and updating barrier walls throughout the project. Existing barriers were fully removed and replaced.  A geogrid was used in areas that could not support a thick layer of aggregate base with the new typical section.

Drainage along the front and back of concrete barriers was studied and adjustments made as needed. This included adjustments to some of the drainage inlets.

For safety purposes, light pole locations were evaluated and poles relocated as needed. Light poles on existing bridge rails were removed and reset or replaced. Traffic control was a significant portion of the work of this project.  Advanced signage and detour routes were established for the eastbound and westbound reconstruction to be stand-alone projects. ODOT identified phasing throughout the total IDL so that CEC could modify signage and detours accordingly.