Cañon City Public Library

Have you ever seen a manhole cover with little glass circles in it and wondered why it was different from the others? Did you ever imagine that there were actually tunnels under the sidewalks? You'll be surprised to find out how many cities in Colorado had these tunnels. And they're still under our streets! Those manhole covers imbedded with glass circles, many that have turned purple with age, allowed light into the tunnels below. The Tunnels Under...

Mechanical ventilation of tunnels is costly because of the initial installation and the continued maintenance and operation. However, at some tunnel length corresponding to a particular altitude, traffic configuration and topography there is a need for this forced ventilation. This study was undertaken to help determine the pollution concentration in existing tunnels in Colorado, and predict the length of tunnels which will need mechanical ventilation....

The Twin Tunnels project will add an additional lane of highway capacity and improve roadway geometry for about 3 miles of eastbound I-70 from the East Idaho Springs Interchange (milepost 241) to the base of Floyd Hill (milepost 244) where the project ties into an existing three-lane section. The eastbound bore of the Twin Tunnels will be expanded to accommodate the widened roadway section.

The Twin Tunnels project will add an additional lane of highway capacity and improve roadway geometry for about 3 miles of eastbound I-70 from the East Idaho Springs Interchange (milepost 241) to the base of Floyd Hill (milepost 244) where the project ties into an existing three-lane section. The eastbound bore of the Twin Tunnels will be expanded to accommodate the widened roadway section.

Again, brilliant Harvard professor Robert Langdon finds himself in a predicament that requires his vast knowledge of symbology and superior problem-solving skills to save the day. The setting, unlike other Robert Langdon novels, is stateside, and in Brown's hands Washington D.C. is as fascinating as Paris or Vatican City (note to the D.C. tourism board: get your "Lost Symbol" tour in order). And, as with other Dan Brown books, the pace is relentless,...

When Gran and his family move to Carousel, he has no idea that the town is built atop a secret. Little does he suspect, as he walks his sister to school or casually eats a banana, that mysterious forces lurk mere inches beneath his feet, tearing up the earth like mini-hurricanes and causing the town to slowly but surely sink. When Gran's friend, the difficult-to-impress Catalina Catalan, presses a silver handle into a hillside and opens a doorway...

In the waning months of the Second World War, a group of children discover an earthen tunnel in their neighborhood.Throughout the summer of 1944--until one father forbids it--the subterranean space becomes their "secret gardens," where the friends play games and tell stories. Six decades later, beneath a house on the same land, construction workers uncover a tin box containing two skeletal hands, one male and one female. As the discovery makes national...

"Highlights the many techniques that earned the Glenwood Canyon highway project the American Society of Civil Engineers' Outstanding Civil Engineering Achievement award for 1993."

Chicago private eye V.I. Warshawski finds herself battling corrupt politicians and the idle rich when the dead body of her friend Deirdre Messenger, a lawyer's wife and woman's shelter volunteer, is deposited on V.I.'s desk, leading her to suspect a case of carefully hidden upper-class domestic abuse.