historic context of maryland highway bridges built between 1948 ...

Table of ContentsExecutive Summary ............................................................................................................................... ES-1Introduction ............................................................................................................................................... 1-1Methodology ............................................................................................................................................. 3-12.1 Background .............................................................................................. 3-12.2 Fieldwork ................................................................................................. 3-12.3 Research and Context Update .................................................................. 3-12.4 Project Personnel ..................................................................................... 3-22.5 Previous Documentation .......................................................................... 3-2Historic Context ........................................................................................................................................ 4-13.1 Introduction .............................................................................................. 4-13.2 Maryland Highways Before and During World War II ........................... 4-23.3 Highway Development in Maryland After World War II ....................... 4-73.4 Maryland and Federal Highway Policy ................................................... 4-73.5 The SRC and Highway Politics In Maryland .......................................... 4-93.6 The SRC & The Division of Bridge Design .......................................... 4-113.7 Important Maryland Highway and Bridge Projects During the1948-1960 Period ................................................................................... 4-14Post World War II Technological Developments .................................................................................... 5-14.1 Developments in Design .......................................................................... 5-14.2 Materials and Technique Developments .................................................. 5-14.3 Individual Bridge-Type Developments.................................................... 5-34.3.1 Metal Truss Bridges (Including Steel) ......................................... 5-34.3.2 Metal Girder Bridges ................................................................... 5-44.3.3 Metal Suspension Bridges............................................................ 5-44.3.4 Steel Arch Bridges ....................................................................... 5-44.3.5 Movable Bridges .......................................................................... 5-54.3.6 Prestressed Concrete Bridges ....................................................... 5-54.3.7 Reinforced Concrete Bridges ....................................................... 5-64.3.8 Concrete Rigid Frame Bridges..................................................... 5-64.3.9 Wood Bridges .............................................................................. 5-7Consulting Engineers and Contractors .................................................................................................. 6-1Results of Field Investigations ................................................................................................................ 7-16.1 National RegisteR of Historic Places Eligibility ..................................... 7-16.2 Descriptions of Surveyed Properties ........................................................ 7-6\15-SEP-11\\ iii