New Bridge Design TDOT
Cost Assessment for 2 Bridge Concept
Demolition Costs Avoided
  [  $20,000]   ($100,000 x 20%)
Sewer Costs Avoided
[$250,000]
Total Costs Avoided
[$310,000]
New Annual Maintenance
$5,000
Sidewalk Costs Avoided
  [  $40,000]   ($200,000 x 20%)
From a cost perspective, there is a fair amount of financial incentive to keep the old bridge in place for use by pedestrians and for utilities.  TDOT has estimated demolition costs associated with the bridge project to be approximately $100,000 – of which the City contributes $20,000 or 20%.  And if sewer service remains on the old bridge, the City will save an estimated $250,000 from avoiding having to build any new sewer lines and lift stations.  And lastly, TDOT’s engineers have reported a probable savings of $200,000 by avoiding have to build sidewalks on the new bridge if the old bridge is converted to a pedestrian/bike path.  All combined, keeping the existing bridge in place is estimated to save $310,000 in capital costs with a likely $5,000 a year in routine bridge maintenance costs for the pedestrian bridge.