480 MINERALS YEARBOOK, 1967 
 
conipariies that have worked on the problem from the 1950's until recently
included the Carter Oil Co., Phillips Petroleum Co., Shell Oil Co., and Marathon
Oil Co. These firms conducted extensive experimental programs, including
pilot plants, in Vernon and Cass Counties. All of the projects were thermal
recovery projects, including in situ combustion (fire flooding) and steam
injection procedures. Estimates of oil in place range as high as 30 billion
barrels. 
 Cities Service planned to construct 402 miles of new pipelines between Springfield
and Washington, Mo., including about 182 miles of 8- and 16-inch main line,
and a new pumping station near Springfield. The original application called
for delivery of natural gas to 39 Missouri towns and several industries near
the proposed main line, all in areas now lacking natural gas service, Cities
Service proposed to construct most of the facilities in 1968, allowing service
to begin by the 1968—69 heat- 
ing season. Estimated annual requirements of the 39 communities would be
3 billion cubic feet the first year. 
 Cities Service applied to Federal Power Commission for approval to build
facilities to handle an additional 200 million cubic feet of natural gas
daily. One of the projects involved expansion of the company's gas-transporting
system from the Kansas Hugoton field east toward the Kansas City area, including
more than 200 miles of new pipeline. The other project would permit the purchase
of 100 million cubic feet of gas daily for customers in southwestern Missouri,
and would require a 40mile pipeline from the Arkansas-Missouri border to
the company's main line near Joplin. 
 Laclede Gas Co. continued efforts to expand gas storage within the St. Peter
Sandstone in St. Louis and St. Charles Counties. During the year, 37 stratigraphic
tests were drilled with an average depth of 400 feet.