Page 15 - Section4.2.1-SWPPPCutSheet-FiltrexxStormWaterBlanket

Post-Construction | Section 2: Storm Water Management | 377

SWPPP Cut Sheet -2.4. Filtrexx ® Channel Protection

Figure 4.2. Staking Details for Filtrexx ® Channel Protection

Table 4.2. Flow Dissipater Sizing for Storm Outlets.

(Source: Kentucky Erosion Prevention and Sediment Control Field Guide)

Culvert Size

Apron width at pipe

Apron length for low fow

Apron length for high fow

8 in (200mm)

2-3 ft (0.6-1m)

3-5 ft (1-1.5m)

5-7 ft (1.5-2.1m) 12 in (300mm)

3-4 ft (1-1.2m)

4-6 ft (1.2-1.8m)

8-12 ft (2.4-3.6m) 18 in (450mm)

4-6 ft (1.2-1.8m)

6-8 ft (1.8-2.4m)

12-18 ft (3.6-5.5m) 24 in (600mm)

6-8 ft (1.8-2.4m)

8-12 ft (2.4-3.6m)

18-22 ft (5.5-6.7m) 30 in (750mm)

8-10 ft (2.4-3m)

12-14 ft (3.6-4.3m)

22-28 ft (6.7-8.5m) 36 in (900mm)

10-12 ft (3-3.6m)

14-16 ft (4.3-4.9m)

28-32 ft (8.5-9.8m) 42 in (1050mm)

12-14 ft (3.6-4.3m)

16-18 ft (4.9-5.5m)

32-38 ft (9.8-11.6m) 48 in (1200mm)

14-16 ft (4.3-4.9m)

18-25 ft (5.5-7.6m)

38-44 ft (11.6-13.4m)