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~~~oc. COLORADO April 13, 1981 Atr. Hob j7olf {"estern Laving Com~xany 1400 West: 64th Avenue P.O. Hox 21649 Denver, Colorado 80221 Dear Gtr. Wolf: DEPARTMENT OF ENGINEERING PHONE W031356d000 EXT. P.O. OOX 756 G REELEV, COLORA00 80631 This is a follow-up to our meeting at Ri.nn, Colorado, on April 6, 1981, regardin€; the impact on local roads due to your existing and proposed gravel mining operations. On April 7, 1981, Mr. Ralph Finch axed I made a more detailed invenotry of the roads in the area. The main purpose of this letter is to state what ue see as the existing conditions. Weld County Road 20~ between '.geld County Roads 1 and 7, and also Weld County Road 20 between Weld County Road 7 and Interstate 25 appear to be in good condition. The surface presently has a chip and seal coat and is showing very fir:~t signs of distress. There 1S minimal transverse cracking and no signs of rutting or wheel line cracking. There is no sign of pot holes or previous pot hole patchir>g with the exception of some areas that appear to be utility installations. Approximately 4% of the area shows light to medium alligator cracking, although none of these areas are imnediately threatening to become pot holes. Weld County Road 7 between Meld County Road 20 and State FTighway 119 is, how- ever, a horse of a different color. The road is presently in an advanced state of decay. Char inventory showed 48A of the area to be all ready patched or severly a.lligatored to the point that pot holing is imineot. The road is how- ever, in fair useable condition and on the day or our inspection, no open pot holes existed. Without further investigation into the depth of the existing asphalt and conditions of any base course or subgrade materials it is difficult to state at this time what level of repair could extend the service life a reason- able period of time. I am sure that a chip and seal or thin overlay would not serve the purpose. It is my understanding that you have not done extensive hauling from the pit you are now developing along Weld County Road 7. Our traffic counts on that stretch of Weld County Road 7 averaged 232 vehicles per day, which would equate to approx- imately (33), 18,000 pound axle passes. I'm sure when you: hauling T~egins~it will dramatically increase the frequencyof 18,000 pound axles and would influence the deterioration of Weld County Road 7. In regard to the maintenance agreement we have attached to the Special Use Permit for the existing operation, I think we can only wait and see what deterioration occurs and decide what steps to take as the operation progresses.