Observations/Finding

On the above date the writer was onsite as requested and observed sub grade and sub base conditions at Nature Walk Pkwy.between sanitary sewer manholes #11 and 6 after rain event.The sub grade conditions between manhole# 11 and 10 appeared stable with blast rock in place with only loose surface silts washed away.The sub grade area previous observed with recommendations to clip -4″ and replace with additional base stone still remain needed for repairs.Most areas appeared stable with recommendations made to place sub base stone over sub grade without clipping to be re observed after placement.Other areas of sub base stone in place between manhole # 9 and 6 had washed silt over some areas and will require clipping to remove.The clipped materials was recommended to be placed at washed gullies at edge of curb line.The Paving contractor continued placing base stone over approved sub grade areas.

The writer also observed the Erosion contractor(Valor) onsite repairing erosion deficiencies at toe of slope on Nature Walk Pkwy. near sanitary sewer manhole #6.

Sub grade requiring -4" clip

Repair area for clip

Washed gullies at curb line

Washed silt over sub base stone

Deficient area due to rain event at toe of slope

Repairing deficient area at toe of slope

Washed sub grade area approved for stone placement

Sub grade approved for base stone placement

Gullies at curb line after rain event

Approved area with rock in place