DEPARTMENT OF PUBLIC WORKS BUREAU OF ENGINEERING & CONSTRUCTION STRUCTURAL DESIGN SECTION REPLACEMENT OF BRIDGE NO. B-0427 ON DAIRY ROAD OVER OWL BRANCH 2014 Maryland Concrete Conference Kevin J. Sabolcik, P.E. Baltimore County DPW David Berkhimer Brawner Builders, Inc.

AN ECONOMIC APPROACH TO A SMALL BRIDGE REPLACEMENT PROJECT OR ‘BRIDGE ON THE QUICK & CHEAP’ DEPARTMENT OF PUBLIC WORKS BUREAU OF ENGINEERING & CONSTRUCTION STRUCTURAL DESIGN SECTION

Problem Analysis – Decision Process Design Construction Conclusion DEPARTMENT OF PUBLIC WORKS BUREAU OF ENGINEERING & CONSTRUCTION STRUCTURAL DESIGN SECTION

What is a project? A series of planned events undertaken in a systematic manner to achieve a specific outcome while balancing the constraints of schedule, cost and performance or quality. DEPARTMENT OF PUBLIC WORKS BUREAU OF ENGINEERING & CONSTRUCTION STRUCTURAL DESIGN SECTION

Existing Structure Built Circa 1920 Concrete Slab w/Encased Steel Beam Superstructure Concrete Abutments on Spread Footings 16’ Long Span, 20’ Clear Roadway, 24’ Out to Out Width

Bridge No. B-0427 Dairy Road Elevation DEPARTMENT OF PUBLIC WORKS BUREAU OF ENGINEERING & CONSTRUCTION STRUCTURAL DESIGN SECTION

Bridge B-0427 Dairy Road Approach

DEPARTMENT OF PUBLIC WORKS BUREAU OF ENGINEERING & CONSTRUCTION STRUCTURAL DESIGN SECTION Interim Action

DEPARTMENT OF PUBLIC WORKS BUREAU OF ENGINEERING & CONSTRUCTION STRUCTURAL DESIGN SECTION Structure Condition Overall Sufficiency Rating ≈ 38% Superstructure in Poor Condition Substructure in Satisfactory Condition Some Minor Lowering of the Stream Bottom along Abutments/Exposed Footings

DEPARTMENT OF PUBLIC WORKS BUREAU OF ENGINEERING & CONSTRUCTION STRUCTURAL DESIGN SECTION Dairy Road Characteristics Rural Local Road (Northern Balt. Co.) Width Varied 16’ to 18” Tangential / Flat Alignment ADT ≈ 575 VPD/2% TRUCKS 30 MPH Design Speed No History Of Accidents At Site

DEPARTMENT OF PUBLIC WORKS BUREAU OF ENGINEERING & CONSTRUCTION STRUCTURAL DESIGN SECTION Other Design Consideration Adjacent Overhead Utilities Soil Borings Indicated 10’ Silt/Sand Mix, 15’ Decomposed Rock then Rock No ROW beyond Existing Footprint USE III Waterway (10/1 to 4/30 Restriction)

DEPARTMENT OF PUBLIC WORKS BUREAU OF ENGINEERING & CONSTRUCTION STRUCTURAL DESIGN SECTION Project Needs Need to Replace Deteriorated Structure Safety – Current Code (Loads, Widths, Barriers, etc.) Get In – Get Out – Stay Out

DEPARTMENT OF PUBLIC WORKS BUREAU OF ENGINEERING & CONSTRUCTION STRUCTURAL DESIGN SECTION Project Wants Want to Avoid Right of Way Acquisition – Highest Priority Want to Minimize Permitting & Utility Issues – Secondary Priority Want Most Cost Effective Solution – Lowest Priority

DEPARTMENT OF PUBLIC WORKS BUREAU OF ENGINEERING & CONSTRUCTION STRUCTURAL DESIGN SECTION Design Direction Leave Existing Abutments for Scour Protection & Minimize Stream Impacts Maintain Low Chord/Road Profile 24’ Clear Roadway Width (Design Exception Documented) Reinforced Precast Concrete Slabs Cast-in-Place Concrete Abutments on Micro-Piles.

DEPARTMENT OF PUBLIC WORKS BUREAU OF ENGINEERING & CONSTRUCTION STRUCTURAL DESIGN SECTION

Performance Specification for Pile Foundation

DEPARTMENT OF PUBLIC WORKS BUREAU OF ENGINEERING & CONSTRUCTION STRUCTURAL DESIGN SECTION

Conclusions Total Project Cost ≈ $500,000 Total Project duration < 12 Months Avoided ROW Issues by Discussing Project with Adjacent Property Owners Achieved Project Purpose

DEPARTMENT OF PUBLIC WORKS BUREAU OF ENGINEERING & CONSTRUCTION STRUCTURAL DESIGN SECTION QUESTIONS??? Teamwork