Taxiway C Realignment & Rehabilitation at T.F. Green Intl. Airport

BETA provided drainage and stormwater design, along with environmental permitting, for the rehabilitation of Taxiway C at T.F. Green Airport. This involved retrofitting existing drainage systems, modifying three outfalls, and implementing three stormwater Best Management Practices (BMPs) to treat and infiltrate stormwater through underground infiltration chambers and swales.

The project aimed to align Taxiway C with FAA standards while improving water quality, reducing flooding, and addressing impairments in Buckeye Brook and its tributaries, as identified in RIDEM’s 2022 Impaired Waters Report. Key improvements included:

• Installation of an Underground Infiltration Chamber System with a total storage volume of 2,187 c.f. (1,096 c.f. chamber storage and 1,091 c.f. stone storage
• Installation of an Underground Infiltration Chamber System with a total storage volume of 1,121 c.f. (553 c.f. chamber storage and 568 c.f. stone storage
• Installation of three dry swales with riprap pads at outlets to wetlands
• Installation of drainage structures adjacent to the existing drainage system to divert lower-intensity storms to the proposed underground infiltration chamber system
• Installation of drainage structures to maintain flow to the existing infiltration trenches
• Installation of one (1) pretreatment unit
• Removal and disposal of several headwalls and culverts, existing gravel access roadway, and pavement from the existing taxiway
• Installation of new pavement structure for the proposed taxiway

Permits obtained from RIDEM include Freshwater Wetlands Permit No. 22-0434, RIPDES No. RIR102440, and Groundwater Discharge/UIC No. 002136.