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HomeMy WebLinkAboutHEARTHFIRE PUD SECOND - Filed SEPD-SURFACE EXPLORATION/PAVEMENT DESIGN REPORT -March 15, 2004 EARTH ENGINEERING CONSULTANTS, INC. Schmidt Earth Builders, Inc. 7250 Greenridge Road FT Windsor, Colorado 80550 J-= Attn: Mr. Charlie Bauer Date: a.? of Fort Collins Re: Pavement Design—Hearthfire Drive Hearthfire 2nd Larimer County, Colorado EEC Project No. 1034124P Mr. Bauer: Our subsurface exploration report for Hearthfire Drive in the Hearthfire development in Fort Collins,Colorado was submitted to your attention on March 10,2004. Based on that report, the City of Fort Collins Engineering Department has provided an estimated traffic loading for the identified street. The design summary is included with this report. A pavement section recommendation is provided in this report based on the traffic loading provided by the City of Fort Collins Engineering Department and remolded subgrade strength characteristics. An R-value less than 5 was estimated for the rough graded pavement subgrades. Using the American Association of State Highway and Transportation Officials (AASHTO) correlation, that R-value corresponds to a resilient modulus value of 3775. The resilient modulus value of 3775 was used in the pavement evaluation. The AASHTO design guidelines for pavement design were used to evaluate a recommended pavement section for this project. A recommended pavement section based on that evaluation is provided on the attached summary. Other sections could be considered; however, City of Fort Collins standards require the use of a composite section. CENTRE FOR ADVANCED TECHNOLOGY 2301 RESEARCH BOULEVARD, SUITE 104 FORT COLLINS, COLORADO 80526 970) 224-1 522 (FAx) 224-4564 Earth Engineering Consultants,Inc. EEC Project No. 1034124P March 15,2004 Page 2 The asphaltic concrete used as the surface course in the pavement area should be consistent with City of Fort Collins classification for Grading S or SX for the local drives; Grading S should be used for collector roadways. Grading SG asphaltic concrete will be required for the bottom lift in asphalt sections greater than 4 inches. The aggregate base should be consistent with Colorado Department of Transportation requirements for Class 5 or Class 6 base. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning this report, or if we can be of further service to you in any other way, please do not hesitate to contact us. Very truly yours, Earth Engineering Consultants,Inc. Reviewed by: I Q REG/S,-. Wolf von Car owitz,P.E. Lester L. Litton, P.E. Senior Project Engineer Principal Engineer cc: Rick Richter- City of Fort Collins (4) y«: V7 \ I , 1Vi c. I') f « 2 4 4 o c, .§ .§ .§ $ w 2 © qm e@ t U k / 03 Z 6 3 a and c & cw . o k u e © ES u z 0 U t c. / 03 ° ° 1 / $ / f / o42 e Q w u m 7 g c J ' .% § k' 22 dkdc w — U Q @ 2 0 e E a % 5 2 C4k 7 u .( -g o ut M . Z / 4) t k