HomeMy WebLinkAboutWPO201200049 Review Comments Bond Inspection 2019-08-23COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road
Charlottesville, Virginia 22902
23 August 2019
Gerri Stewart
The Miller School of Albemarle
1000 Samuel Miller Loop
Charlottesville, VA 22903
gstewarta,millerschool. org
Re: Bond inspection for The Miller School New Entrance VSMP Bond (SWM portion)
Ms. Stewart,
Your bond inspection request for The Miller School New Entrance been processed. The SWM
portion of the bond can be released after the following issues have been addressed. The reduction or
release of the ESC portion will be calculated separately by the Erosion Control Inspector and the new
bond amount will be provided by Ana Kilmer.
Prior to the full release of the bond:
1. The geometry of the two biofilters does not match what is shown on the approved plans nor the
minimum requirements of the Va. Stormwater Handbook. The as -built survey shows that the dams
do not maintain the 3' height from the floors throughout their length as required by the approved
plans and the side -slopes are also steeper than the 3:1 maximum.
2. Several of the trees and shrubs were observed to be dead or dying. These will need to be
replaced, and will need to total 17 shrubs and 7 trees in the East Biofilter and 29 shrubs and 12 trees
in the West Biofilter. These should also be included on the as -built survey (as a table will be fine).
3. The Biofilters had clay/sediment deposits and will need to be cleaned and mulched. Areas
draining to the biofilters may need to be further stabilized to prevent this in the future.
4. Test pits showed that the biomix was not the required 2.5' deep per the plan and was only around
18" deep. The biomix will need to meet the 2.5' depth, or can meet a minimum 2' depth provided the
design requirements are met for the Level 1 Biofilter in DEQ BMP Spec. 9. This option will require
stamped calculations from a design engineer and revised plans to be submitted and reviewed as a
plan amendment. Further options can be discussed with an on -site meeting. Also show the material
depths on the as -built plans.
5. The stone weirs will need to be reconfigured to meet the standards from the Va. Stormwater
Management Handbook.
Please contact me or Repp Glaettli (at 434-296-5816 x3424 or rglaetti cr,albemarle.org,) if you have
questions or wish to schedule a meeting on -site.
Sincerely,
Matt Wentland, PE
Civil Engineer II
Copy: Ana Kilmer, Frank Pohl, Repp Glaettli, Tim Miller, File