50' Box Culvert

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This is a picture of a 50' box culvert. Using a culvert of this width would allow both the wetlands and a slightly elevated pedestrian trail to use the same under-crossing. The advantage of this culvert is increased visibility and hopefully less crime as a result.

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This document shows 2008 cost estimates for a 50' box culvert. In comparing 2008 estimates for the two separate culverts vs. the 50' box culvert, there is less than a $200,000 difference. The two separate culverts (estimated with retaining walls) were projected to cost $1.2 million. The 50' box culvert (also estimated with retaining walls) was projected to cost $1.4 million. In reality costs have decreased since these estimates. The city has already secured fill for significantly less than estimated above. Also, we would prefer a 1:3 landscaped slope instead of retaining walls which would further reduce each estimate by about $400,000.