You should have no problems finding the cache under this awesome walkway bridge. Just watch out for the troll who has been known to protect this bridge!
Ever heard of the National Bridge Inventory? Per Wikipedia: "The National Bridge Inventory (NBI) is a database, compiled by the Federal Highway Administration, with information on all bridges and tunnels in the United States that have roads passing above or below. This is similar to the grade crossing identifier number database compiled by the Federal Railroad Administration which identifies all railroad crossings. This bridge information includes the design of the bridge and the dimensions of the usable portion. The data is often used to analyze bridges and judge their conditions. The inventory is developed with the purpose of having a unified database for bridges to ensure the safety of the traveling public as required by the Federal-Aid Highway Act of 1968. It includes identification information, bridge types and specifications, operational conditions, bridge data including geometric data and functional description, and inspection data. Any bridge more than 20 feet (6 meters) long used for vehicular traffic is included."
Source: https://en.wikipedia.org/wiki/National_Bridge_Inventory
I found a neat online tool for accessing the NBI, and have been checking on the conditions of all the bridges I frequently drive over on my daily commute. Our "Troll Bridge" doesn't appear in the database, as it's purely used for foot traffic, is too short, and is controlled by the warty troll in residence.
The National Bridge Inventory Database
Step 1: Go to http://www.nationalbridges.com/
Step 2: Select "CO – Colorado" in State pulldown
Step 3: Enter in "035" in County FIPS Code field for Douglas County
Step 4: Select "Submit" button
Step 5: Scroll through the listing of every bridge in Douglas county. The 11th column over ("Suff. Rat.") provides the official Sufficiency Rating (0-100%) of each bridge.
A note on a bridge's "Sufficiency Rating" score:
"The sufficiency is a method of evaluating highway bridge data by calculating four separate factors to obtain a numeric value which is indicative of bridge sufficiency to remain in service. The result of this method is a percentage in which 100 percent would represent a entirely sufficient bridge and zero percent would represent an entirely insufficient or deficient bridge."
Troll Bridge
| Difficulty: 
| Terrain: 
6 
2 
1 
1