The Harbor Tunnel Thruway, opened to traffic on November 30,
1957, provides a North-South by-pass of the City of Baltimore as well
as rapid motor transit from one area of the City to another. In addi-
tion to the twin tunnels under the Patapsco River, which are 1.7 miles
in length, it has approximately 18 miles of access roads and approaches
usable only by Tunnel patrons. These access roads, in addition to con-
necting with principal traffic arteries in the City, provide a link
between such through routes as U. S. 40 North and U. S. 40 West, the
Washington Expressway, and immediate connections to U.S. I North
and South, and to U. S. 301 South.

Revenue and Expenditure Budget
Fiscal Year Ending September 30, 1961

Revenue Budget:

Toll Income $15,913,000
Investment and Miscellaneous Income 430,000

Total $16,343,000
Expenditure Budget:

Susquehanna River Toll Bridge $ 276,900
Potomac River Toll Bridge 163,000
Chesapeake Bay Toll Bridge 380,000
Patapsco Tunnel 1,322,900
Administrative and General 277,700
Bridge and Tunnel Revenue Bond Interest 6,045,940

Total $ 8,466,440
Remainder Available for Sinking Fund Purposes $ 7,876,560

BUREAU OF CONTROL SURVEYS AND MAPS
Advisory Board

Charles Looney, Department of Civil Engineering, University
of Maryland; Albert P. Backhaus, Director, Department of
Public Improvements; James J. O'Donnell, Director, State
Planning Department; Norman M. Pritchett, Chief Engineer,
State Roads Commission; Joseph T. Singewald, Jr., Director,
Department of Geology, Mines and Water Resources.
George W. Cassell, Engineer-in-Charge

300 W. Preston Street, Baltimore I Telephone: 837-9000

The Bureau of Control Surveys and Maps, established by Chapter
628, Acts of 1939 but inactive during World War II, was reactivated
by the State Roads Commission in 1951 (Chapter 284, Acts of 1951).
This Bureau is directed by an advisory board consisting of the Chief
Engineer of the State Roads Commission, the Director of the Mary-
land State Planning Department, the Director of the Department of
Public Improvements, the Director of the Department of Geology,
Mines and Water Resources, and the Dean of the College of Engineer-
ing of the University of Maryland. It coordinates the activities of the
various agencies engaged in mapping and surveying in the State; pro-
motes the use of the Maryland Plane Coordinate System for engineer-
ing projects; through field observations, extends the control network
for use in highway surveys; and maintains a complete file of control,
both horizontal and vertical, available throughout the State (Code
1957, Art. 91, sees. 30-35). The funds for the operation of the Bureau
are provided in the budget of the State Roads Commission.