From: FAVREAU EricJ <br />Sent: Wednesday, September 13, 2017 11:55 AM <br />To: GIOELLO Nick R <Nick.R.Gioello@ci.euRene.or.us> <br />Subject: FW: Email for E.Favreau <br />Hi Tick, <br />Here is a response from Teri Higgins, who was the project manager for the Spring/Capital Drive rehabilitation project last <br />year. To sum up what she's saying, Capital Drive meets a 30 year design load of 22,237 lb ESAL (Equivalent Single Axle <br />Load). Also note Teri's comment about Capital Drive having the structural capacity to allow traffic counts to more than <br />double. <br />Teri also has shown that Spring also has adequate structural capacity. Feel free to call me with any questions. <br />Thanks, <br />Eric <br />From: HIGGINS Teri L <br />Sent: Wednesday, September 13, 2017 7:30 AM <br />To: FAVREAU EricJ <Eric.J.Favreau(@ci.euene.or.us> <br />Subject: FW: Email for E.Favreau <br />Sure do. <br />Capital and Spring were rehabilitation projects as opposed to a reconstructed street, the difference being that we strive <br />for a 20 year design if we can get it, but we wouldn't reconstruct it if we can achieve a suitable outcome otherwise. A <br />street slated for reconstruct is designed for 30 years. <br />That being said, the existing structure of Capital was 7" to 8" of ACP on clay with the top 2 inches delaminated. The <br />Class counts conducted in 2015 only registered 5.6 Class 5, equating to a 20 year design ESAL of 13,917, and a 30 year of <br />22,237. Based on an R value of 5, the existing structural number was 2.94. The required SN is 2.0 for 20 year, and 2.2 <br />for 30 year, so the existing ACP thickness meets a 30 year design. <br />The treatment for the street was a 2" to 4" cold plane pavement removal followed by 2" to 4" of ACP. <br />With 7" to 8" of ACP, the traffic count could more than double and the street would meet the design requirements. <br />[due to the lack of as-builts a number of pavement cores were taken on Spring. The street structure was not very <br />consistent - some of the cores indicated 3"-4" of ACP on degraded PCC, and other were 5"-6" of ACP on aggregate. The <br />20 year ESAL is 247,488. Similar to Capital, the treatment was to remove the ACP to PCC and re-pave with 4" of <br />ACP. During construction, the street did not indicate any "soft" areas, so the re-paving is expected to perform well <br />under the design loadings, and is probably sufficient to handle an increase volume of traffic. <br />PWE has not done any work or research on Fairmount or 21S' <br />t. <br />[The entire original message is not included.] <br />