CDDI verified the horizontal and vertical control data provided by the client, and established our own as needed. CDDI also performed a spot check on the existing topography and flagged the limits of disturbance at 50 foot intervals and angle breaks along the right of way. The referenced right of way was for Arrowhead Drive and Arrowhead Court in the area of housing construction for lots 17 though 24, block ‘H’.
CDDI provided the stake-out for three (3) sediment traps with offsets to the bottom contour and provided stake-out for the house pads for rough grading, providing cut sheets for both. In addition, CDDI set points at 50-foot intervals along the street centerlines and sewer right-of-ways.
The storm water management pond was set at contours and locations requested by the contractor. CDDI prepared as-built plans of the pond and provided them to the appropriate agency for approval, based on a field survey.
CDDI provided stake-out of the main sanitary sewer lines and manholes at 50-foot stations and provided cut sheets to the client. The main water line and fire hydrants at 50-foot stations were provided. The stakeout at a 10-foot offset for storm drain lines and structures was done and all pipes were staked at 50-foot stations including all points set at each structure.
For the curb and gutter stake-out, CDDI set points on 5-foot off-set at 25-foot intervals for curve linear and 50-foot intervals for tangent sections including all points of curvature, tangency and centerline of driveway per approved site plans. CDDI will set points on 5-foot off-set necessary intervals on both sides of Oak Grove Road for the remaining curb and gutter stake-out.
As-built plans of all storm drain structures were prepared and provided to the appropriate agencies for approval, by CDDI.
For the home construction phase of the Perrywood Manor project, CDDI revised the site plan showing final site development for the houses. This plan included building restriction lines, driveway locations, water and sewer connections, proposed and existing grade, etc. The client provided architecture and house mix for each individual unit.
The landscape plan was revised and designed to conform with Prince George’s County’s landscape ordinance, including the details of installation and materials. CDDI set off-set hubs at major foundation corners at a 10-foot building envelope and provided cut sheet to the client.
CDDI provided necessary drawings and certifications showing that the foundation structure was located in accordance with the stake-out and a final house location survey showing the house and all visible improvements on the lots.
In addition, an elevation and grading certification was provided to the required entities for Prince George’s County, both based on a field survey. Also, a landscape certification and structure certification were provided.
For the final inspection by the county, CDDI set an iron pipe with cap at each lot corner, concluding the work done for the Perrywood Manor subdivision.