Minnesota Digital Library

A typical concrete pavement has expansion and contraction joints across and along the pavement surface. The joints allow the pavement to change in dimension with changes in temperature. A continuously reinforced concrete pavement (CRCP) does not have expansion or contraction joints. Random, closely spaced cracks are expected to develop naturally and allow for expansion and contraction due to temperature changes. The many random cracks eliminate expensive joint maintenance. This maintenance-free service life feature has not occurred in Minnesota. During past years, an increasing number of CRCP s have exhibited deterioration where pieces of concrete separate from the surface of the pavement and potholes result. This is termed spalling. The frequency and extent of this deterioration has progressed from isolated and random to widespread and frequent. A comprehensive program was initiated by Mn/DOT to study this problem and develop possible solutions. This CRCP inventory is a physical evaluation of the extent of corrosion on random, sections of pavement. It is related to concurrent efforts which will evaluate CRCP rehabilitation, techniques.

Contains a statistical report of the expenditures of the State Highway Department for the year 1923 with charts showing federal aid appropriations to Minnesota, construction on trunk highways by the state, distribution of trunk highway maintenance expenditures, analysis of trunk highway mileage, status of trunk highway mileage by counties, 1923 accomplishment report on trunk highway maintenance, analysis of maintenance expenditures by class and item, analysis of maintenance expenditures by commodity, traffic observations on trunk highways, summary of laboratory tests on materials, statement of expenditures, construction on state aid roads, the status report of federal aid payments on federal aid projects, maintenance expenditures on state aid roads, condition of state aid roads, abstract of annual reports on trunk highway expenditures, abstract of annual reports on state aid road expenditures. Submitted by Charles M. Babcock, Commissioner of Highways. [82 pp.]

Contains a report of the expenditures and achievements of the State Highway Department for the year 1922, road construction and maintenance, bridge construction and maintenance, road equipment, surplus war material, snow removal, trunk highway marking, traffic census, tests and inspection, highway offices and buildings, accounts, federal aid appropriations, construction on trunk highways by the counties, distribution of trunk highway maintenance expenditures, analysis of maintenance expenditures by commodity, analysis of maintenance expenditures by class and item, status of trunk highway mileage by counties, analysis of trunk highway mileage, traffic census observations on trunk highways-average number of vehicles per day, summary of laboratory tests on materials, Minnesota Highway Department financial statement, construction on state roads, state aid road and trunk highway construction upon which federal aid is applied, maintenance expenditures on state aid roads, abstract of annual reports on trunk highway and state aid road expenditures, condition of state aid roads, photos of roads and bridges, of Minnesota Highway Department-Central Office, main floor, drafting room, garage, machine shop, stock room, of Engineers' Convention Auditorium. Submitted by Charles M. Babcock, Commissioner of Highways. [117 pp.]

Contains charts showing state construction on trunk highways, construction by the counties on state trunk highways, distribution of 1921 trunk highway maintenance expenditures, analysis of expenditures on trunk highway maintenance work ending 1921, status of trunk highway mileage by counties, analysis of trunk highway mileage, 1921 traffic census observation on trunk highways average number of vehicles per day, performance and cost of operation of state owned gravel truck fleets, departments expenditures, allotment of state air road funds, construction on state roads, state and road and trunk highway construction upon which federal aid is applied, maintenance expenditures on state aid roads, abstract of annual reports on state aid road expenditures, status of improvement of state aid roads, a colored photo of State Highway no. 7. Submitted by Charles M. Babcock, Commissioner of Highways. [64 pp.]

Contains a report of activities of the State Highway Department during the calendar year of 1920, road construction and maintenance, excess war material, charts showing status of federal aid funds by states for period ending Dec. 31st 1920, construction on state roads, state road construction upon which federal aid is applied, motor vehicles on hand, motor vehicles delivered to counties, miscellaneous excess war material, etc. Submitted by Charles M. Babcock, Commissioner of Highways. [44 pp.]

Contains charts showing construction on state roads, construction of town and county roads, maintenance expenditures on state roads, maintenance force, accidents reported on state roads, abstract of traffic observations on state roads, status of improvement of state roads, statement of allotment of state aid road funds, statement of county road and bridge funds, Minnesota Highway Department financial statement. Submitted by Charles M. Babcock, Commissioner of Highways. [42 pp.]

Contains charts showing construction on state roads, statement of state aid road fund, maintenance costs and work, state road condition, accidents on state roads, and Minnesota Highway Department financial statement. Submitted by Charles M. Babcock, Commissioner of Highways. [19 pp.]

Contains a report of activities of the department for the years 1915 and 1916, maintenance and construction chart showing division of cost of work done in each county, statement of state aid road funds, units of work on which state aid was paid, engineers general report, pictures of roads and bridges. [40 pp. + 1 folded, one-sided table, 13 x 23 in.]

The 1909-1910 report contains a report of the state engineer George W. Cooley about work done for the two-year period ending December 31st, 1910, designating state roads, road work, bridges and culverts, experimental road work, road maintenance, good road exhibit, road material resources of the state; pictures of roads and bridges. The 1911 report contains a report of the state engineer George W. Cooley about work done during the season of 1911 and a summary of all work from 1906 to 1911. The 1909-1910 report was submitted by Louis W. Hill, Chairman, Charles M. Babcock, Clarence I. McNair. The 1911 report was submitted by Charles M. Babcock, Chairman, Clarence I. McNair, F.S. Bell. [57 pp.]

Contains a report of the state engineer George W. Cooley about work done by counties under State Aid for the two year period ending December 31st, 1908 (The first allotment of State Aid Funds was made March 5th, 1907), experimental road work, road material resources of the state, bridges and bridge accidents, Minnesota river floods, state boundaries, topographical features, opinions of the Attorney General furnished to the Highway Commission during 1907 and 1908, appendixes (Office of the State Highway Commission Circular no. 2 & 3, Bulletin no. 3); index; pictures of roads and bridges; map of Minnesota showing state roads. Submitted by Gustave Scholle, Chairman, J.B. Galarneault, Charles Halvorson. [96 pp. + 12 leaves of photos + 4 folded, one-sided plans, 9 x 14 in. + 1 map, 15 x 21 in. ]