Hannibal MACC Detention Basin Restoration Project

2026-11-03

Project Overview Moberly Area Community College is seeking bids from qualified contractors to restore an existing detention basin to its original functional condition while improving long - term erosion resistance . The project includes grading , erosion repair , reinforced materials , concrete repairs , and site restoration . Scope of Work The contractor shall provide all labor , materials , equipment , tools , supervision , and incidentals required to complete the following work : - Remove and dispose of existing rock and landscape edging within the detention basin . - Reinstall the flared end section disconnected from the north storm pipe outlet and ensure proper alignment and stabilization . - Regrade the bottom of the detention basin to original plan grade to restore proper drainage . - Supply and install approved separation geotextile fabric on prepared soil subgrade . - Supply and install white limestone riprap over fabric . Riprap shall be larger and more durable than existing material and suitable for stormwater flow conditions . - Form and pour flowable fill concrete beneath the south spillway to repair erosion under the existing concrete slab . - Backfill and compact fill material along the east side of the spillway . - Form and pour approximately 10 linear feet of concrete curb on top of the east side of the spillway slab to improve erosion control . - Add topsoil to the west slope to repair lawn mower rutting and fine grade for turf . - Seed , straw , and fertilize all disturbed areas affected by construction activities . Contractor Responsibilities - Provide all equipment , including excavation and safety measures such as utility locates . - Maintain safe work zones and protect adjacent roadways and campus property . - Restore all areas not specifically designated as part of the final construction .

Missouri

2026-04-29