Project Description

Project Location

The overpass extends from the intersection of 5th Street and Jerry Street on the east side of I-25, over I-25 and Plum Creek, and connects to Park Street on the west side of I-25.

Construction Budget

The construction cost for the 5th Street Overpass project was approx. $3.7 million.

Detailed Improvement Description

Interstate Overpass Structure and Local Street Improvements

The design provides one 12-foot through traffic lane in each direction for 5th Street, beginning at Jerry Street east of I-25, continuing west over a new I-25 and Plum Creek overpass structure to connect to a similar section at Park Street west of I-25. The lanes each have a continuous 2-foot outside shoulder with standard curb and gutter. The lanes are separated by a double yellow line. The project includes 10-foot parking lanes and 5-foot attached sidewalks along both sides of 5th Street east of I-25 and an 8-foot attached sidewalk on the south side that extends across I-25 to the Park Street connection.

Cross-Section of 5th Street East of I-25

Cross-Section of 5th Street Overpass Structure

Cross-Section of 5th Street West of I-25

The overpass structure is a three span haunched steel I-girder bridge with a concrete substructure and deck. A 3-inch asphalt overlay will be placed on the deck as a roadway wearing surface. (Remember to use our glossary to look up unfamiliar terms.)

The structure has been sized to accommodate the future expansion of I-25 which has been recommended by the South I-25 Corridor and US 85 Corridor EIS. Note: The South I-25 Corridor and US 85 Corridor EIS has been completed and the ROD has been signed.

Other elements included with the project are standard handicap ramps, driveway cuts, stormwater drainage facilities, signing, striping, and street lighting.

Artist's simulation of proposed 5th Street and I-25

The photo-simulations below show the 5th Street location before construction, after completion of the overpass, and with the new I-25 laneage proposed by the South I-25 Corridor and US 85 Corridor EIS.

5th Street and I-25 Existing Conditions

5th Street and I-25 with Proposed Bridge

5th Street and I-25 with EIS I-25 Laneage