Specifications include, but are not limited to: A contractor for repair services, and hereby requests quotes from contractors to perform repair services at the Mississippi Museum of Natural Science, Jackson, MS to make improvements to the hiking and walking trails. The detailed scope of services includes: Removing bridges A thru E. Installing new ones using all treated lumber. All pilings are to be 6X6 and set with two feet of concrete. All handrails, joist are to be bolted and constructed as original. All two by six decking screwed with deck screws. Replacing retention walls as needed and installing new ones as needed and repairing ones that have come loose. Installing an estimated 200 cubic yards of Crush and Run or Aggregate two inches thick to be spread on the Blue, Green, Yellow, and White trails.