Extensive highway seal-coating projects will be completed this summer in six southern Utah counties by two area contractors.

The contractors bid less than the engineer's estimate on three different contracts. Projects will be completed in Kane, Garfield, Piute, Wayne, Sevier and Sanpete counties.Cox Rock Products of Centerfield, Sanpete County, placed the apparent low bid for projects in Sanpete and Sevier counties. The contractor bid $525,471. The Utah Department of Transportation engineer's estimate was $617,665.

Hales Sand and Gravel of Redmond, Sevier County, was apparent low bidder on two bids, submitting prices of $264,725 and $186,500, respectively.

Contractors' total bids were about $114,000 less than the engineer's estimates.

A UDOT spokesman said cracks are appearing in road pavement in the areas. Seal coating is a comparatively low-cost form of preventive maintenance.

Seal coating with gravel chips has a side benefit for motorists. It provides a skid-resistant driving surface.

Here are the projects on the docket for the summer months:

U.S. 89 from Salina, Sevier County north city limits to Axtell, Sanpete County, seven miles; U-28 from the junction of U.S. 89 in Gunnison to Fayette, Sanpete County, four miles; U-28 from the Sanpete/Juab county line south, two miles.

Also, U.S. 89 from 30 miles northwest of the Utah/Arizona border toward Kanab, Kane County, eight miles; U.S. 89 from Marysvale, Piute County, to the Sevier County line, five miles; U-63 from the north boundary of Bryce Canyon National Park to Teasdale Junction, Wayne County, on the north side of Boulder Mountain, three miles.

Also, U.S. 89 from Manti north city limits to Ephraim south city limits, six miles; U-116 from Moroni to Mt. Pleasant in Sanpete County, four miles; and U-31 from U.S. 89 in Fairview Sanpete County, east through Fairview Canyon to near the junction of U-264, eight miles.