CCP 10-09-2001 - Laserfiche WebLink

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I It I I I I I I I it I I I I I I It I I Alternate 4 presents the greatest challenge with respect to soils. Organic soils extend 1000 feet along the length of the project and reach a depth of 23 feet. The existing TCAAP road has partially consolidated the soils. Excavation is not recommended due to the depth of the organic soils and the close proximity of the aqueducts. Likewise. a floated embankment is not recommended because it will induce lateral pressures on the aqueducts. Also, the partially consolidated soils will cause a floated embankment settle unevenly. A land bridge across 1000 feet is very expensive. There is no good approach to correct the organic soils for Alternate 4. 5.5 Recommended Alternate With input from the Cities of Shoreview, Arden Hills, and Independent School District 621, an abbreviated version on Alternate 3 (as described in section 4.0 and shown on Sheet 1,2, and 3) has been chosen. This alternate has been chosen because it corrects the congestion problem at County Road I and Lexington A venue by allowing installation of a traffic signal at a single intersection. Given the relatively low traffic volumes, the uncertainty about future TCAAP development, the environmental constraints, the unstable soils, and the high cost of construction, the Cities and County have determined that full construction through to Hamline Avenue is not warranted at this time. !, T!,,, h::' :\U::\J.\: ;\-. ":_ Fcp' \-;