2013-09-25_REPORT - M1980244 - Laserfiche WebLink

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CC L &VI i. AM 15 minutes. The ABC material was graded to a thickness of 6 inches from Stations 1009 +50 to 1014+00 full width and form Stations 1014 +00 to 1016 +20 from center line left. Schmidt's equipment consisted of a John Deere 31OSG combination loader, A John Deere 672D grader, a Cat CS56 vibratory, 10 -ton, smooth -drum roller, and a Cat 938G loader. Ames used a DP 15001 to drill approximately 81 holes for the fence post on the west side of SH 67 realignment. The holes were drilled from Sta.1010 +75 to 1018+00. Borings were approximately 5 feet deep and spaced about 10 feet apart. Ames also graded a 50 foot section adjacent to existing SH 67 allowing room for the guardrail end section at Station 1008+68 to be installed. An approximately 6 inch thick layer of topsoil was placed on the lower portion of the downstream slope of the Highway 67 Realignment Embankment. A Cat D8T and Cat D6N (GPS) dozer placed the material working from the bottom up. The material was loaded by a Cat 320 excavator into a Cat 740 haul truck from the topsoil stockpile located next to the underdrain detention ponds at the base of the realignment embankment and transfer to the dozers. Topsoil placement is expected to continue. Clearing and grubbing occurred below hwy 67 in preparation of fill placement at approximate Sta.1029 +00 South MSE Wall: Ames continued mat and underdrain construction on the South MSE wall between approximate stations 0 +40 thru 5 +98 Mats were constructed by placing welded wire baskets along the exterior of the wall's alignment. The baskets were wire -tied together with approximately 2.5 inches of overlap. Approximately 7ft to 8ft foot lengths of Tensar UX1500 and UX1100 geogrid (per specification) were joined to the 18 inch wire welded basket leg lengths to create 8.5 to 9.5 foot reinforcement lengths for the wall. The Tensar geogrid was pulled taught against the wire baskets and secured by hand while placing reinforcing fill material. Tensar LH800 geogdd was installed on every other mat for the attachment of the timber facing. Locking tail struts were placed every 16 inches on center mechanically securing the geogrid to the baskets and reinforcing the front face of the basket. A tail strut was also added at the 2'/ inch horizontal wire overlap of the basket. Face rock was placed in the wire baskets after lining the interior front face of the basket with BX1120 geogrid. Reinforcing fill material and face rock was separated from each other using non -woven geotextile material. The reinforcing fill material was placed in 9 inch lifts and packed with plate tampers within 3 feet of the wall face and with the CS-433 vibratory roller on the areas greater than 3 feet in distance from the wall face. Each mat was tested for compaction and moisture content at the completion of mat prior to placement of next mat. Compaction tests performed met or exceeded 95% compaction. Reinforcing fill material was moisture conditioned prior to placement. Ames continued placement of the underdrain at the back of the MSE wall along the face of existing rock. Non- woven geotextile was placed along a trench at the back of the wall where the reinforcing fill meets the native granite wall. Four inch diameter, perforated, corrugated, HDPE piping was laid out in the trench on top of the geotextile. Drain rock was placed over the pipe and wrapped with geotextile with a minimum of 18 inch overlap prior to placement of reinforcing fill. Reinforcing fill was placed in 9 inch lifts and compacted using a Cat CS433E smooth drum vibratory roller. Approximately, 9,884 sq. ft. of wall face has been completed to date. MSE wall components continue to be installed per plans and specifications. Page 3 of 7 MLE2 WE 09.07. t 3.doc