Water

US 17 Septima Clark Parkway Drainage Improvements

Client
City of Charleston
Date
In Progress
Disciplines
Construction Administration & Inspection
Environmental
Surveying
Transportation Engineering
Water & Wastewater Engineering
Objectives

The City of Charleston required improved drainage for US 17 Septima Clark Parkway to alleviate flooding that caused standstill traffic and damage to vehicles and neighboring structures. Davis & Floyd was engaged to design and construct a drainage solution of a 500-acre basin located within the peninsula of Charleston.

Awards:

Stormwater Solutions 2009 Top Stormwater Projects Award

ACEC-SC Engineering Excellence Awards State Finalist

Scope

Dug 5,360 linear feet of a 12-foot-diameter tunnel and 2,075 linear feet of a 10-foot-diameter tunnel located 140 feet below the surface

Designed a building to house three water pumps, mechanical screens, silt removal pumps, electronic controls, and emergency generator

Constructed concrete pump station wetwell and storm-water drainage system

Installed new pavement, associated striping, signage, street lighting, concrete median wall, granite and concrete curbing, sidewalks, crosswalks, and ramping

Challenges

Accommodating a flat terrain and tidal influences throughout the design process

Working around a restrictive construction zone that involved poor soils, daytime lane closures, and night work within residential areas

Outcome

Increased highway accessibility, traffic efficiency, and vehicular and pedestrian safety along a major artery that was previously encumbered by flooding and heavy traffic.

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