Hydroseeding Underway

On Wednesday, the hydroseeding process of the freshly graded areas between parallel north-south taxiways and the runway commenced. What is hydroseeding? Here’s a little info courtesy of Wikipedia…

Hydroseeding between Runway 21 and taxiway

DESCRIPTION: Hydroseeding (or hydraulic mulch seeding, hydro-mulching, hydraseeding) is a planting process that uses a slurry of seed and mulch. It is often used as an erosion control technique on construction sites, as an alternative to the traditional process of broadcasting or sowing dry seed.

The hydroseeding slurry is transported in a tank, either truck-mounted or trailer-mounted and sprayed over prepared ground. Helicopters have been used to cover larger areas. Aircraft application may also be used on burned wilderness areas after a fire, and in such uses may contain only soil stabilizer to avoid introducing non-native plant species. Hydroseeding is an alternative to the traditional process of broadcasting or sowing dry seed. A study conducted along the lower Colorado River in Arizona reported that hydroseeding could be used to restore riparian vegetation in cleared land.[2]

The slurry often has other ingredients including fertilizertackifying agents, fiber mulch, and green dye.

Spray application of hydroseed

HISTORY: Maurice Mandell of the Connecticut Highway Department is responsible for coming up with hydroseeding. Back in the 1940s, Mandell was tinkering with ways to grow healthy grass and avoid soil erosion along the slopes of Connecticut’s expressways. He mixed up seed and water then had it sprayed over the slopes where the grass could sprout and take hold, even on a steep incline.

ADVANTAGES: If planting a relatively large area, hydroseeding can be completed in a very short period of time. It can be very effective for hillsides and sloping lawns to help with erosion control and quick planting. Hydroseeding will typically cost less than planting with sod, but more than broadcast seeding. Results are often quick with high germination rates producing grass growth in about a week and mowing maintenance beginning around 3 to 4 weeks from the date of application. Fiber mulch accelerates the growing process by maintaining moisture around the seeds thereby increasing the rate of germination.

Hydroseeding should be complete In the next few days. Over the past number of weeks, areas have been regraded for improved drainage and to mitigate damage to the asphalt that has occurred over the years. In addition, large portions of the taxiway pavement has been repaired/replaced and enhanced with wider turning radii at runway intersections.