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Home My WebLink AboutSUB201500202 Action Letter 2017-07-19COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road, Room 227 Charlottesville, Virginia 22902-4596 Phone (434) 296-5832 Fax (434) 972-4126 Bond Reduction Request July 19th, 2017 Jess Achenbach Red Dirt Developments P.O Box 645 Charlottesville, VA 22902 iess(c—vreddirtdev.com Re: Road Bond reduction request for Carroll Creek Road — SUB201500202 Thank you for the documentation regarding the bond reduction request for Carroll Creek Road. The Road Bond under SUB-201500202 is currently at the original amount of $425,180. As a result of an inspection performed on July 7, 2017 by me and the County Engineer, this bond can be reduced to an amount of $111,500. The remaining bond amount can be released after addressing the following deficiencies: As -Built Survey and Bond Inspection Comments 1. The guardrail on the trail -side of the roadway from station —12+50 to —14+50 is installed at a height of —21-inches, as measured from the top of the asphalt trail to the top of the guardrail. Confirm and certify that this is acceptable and is not a safety issue or raise the guardrail to meet the minimum design height of 27-3/4". If this is determined not to be a safety issue, update as -built cross -sections to show installed height. The County has not approved opening of the road. Considering the road has been opened, the developer is accepting all risks regarding this deficiency. 2. As -built drawing does not identify the culvert crossing Carroll Creek Drive east of the telecom pad. Revise as -built survey to include this culvert. Provide a detail for the culvert extension. The culvert enters from the south as CMP but exits as HDPE. It is unclear how these culverts are connected under the road and this is typically not acceptable. Additionally, provide positive drainage at the outlet to the stormwater facility. 3. Identify the minimum constructed separation between the asphalt trail and the road edge - of -pavement. Field measurements indicate separation to be approximately 3.5 ft, not 5-ft as designed. Revise road cross section to reflect as -built separation and provide certification that this is not a safety issue. 4. The 5-ft shoulder on the north side of the road was not installed with the approved width. It is approximately 1.5-ft before the 2:1 slope begins. Revise road cross section to accurately reflect as -built shoulder width and provide certification that the reduced shoulder width is not a safety issue. Note 13 on Sheet C 1 of the approved plans state "exceptions will not be allowed." 5. Contours on the as -built survey were measured to be a 2:1 slope. There are areas that exceed 2:1 slope. Note 6 on Sheet C1 states "The maximum allowable slope is 2:l ...". Engineering Review Comments Page 2 of 3 Correct areas where slopes exceed 2:1. 6. Provide upstream and downstream invert elevations for the box culvert on the as -built survey. Only one elevation is provided and it isn't clear if this is the elevation at the inlet, outlet or some other location within the culvert. 7. Confirm box culvert span and height dimensions. Field measurements indicated these dimensions were not 10'-0" as designed. If dimensions aren't as designed, a revised flood study may be required to confirm backwater elevations. 8. Two water meter valve lids/casings protrude above the asphalt surface near the ACSA entrance. Lower lids/casings so that they are flush with the road surface to avoid damage during snow removal. 9. Drainage ditch on the northeast side of Carroll Creek Drive to the stream was not constructed as designed. Runoff discharges into the wooded area. Install the conveyance channel. 10. Drainage ditch on the southeast side of Carroll Creek Drive from the ACSA access road to the lower ditch was not installed. Even though some of the drainage appears to have been rerouted to the culvert across from the ACSA entrance, signs of erosion are already noted. Install a conveyance channel to adequately convey drainage to the lower channel and ultimately to the stream. The outlet of the lower channel to the stream is heavily eroded and may require a riprap outlet. 11. There is up to a foot of soil retained by silt fence above both headwalls. Correct the grading so the silt fence does not act as a retaining wall. Final grades should not exceed 2:1 slope. 12. Wingwall lengths are shorter than designed, which has resulted in grades exceeding 2:1 at the ends of the wingwalls, where erosion is occurring. Grade the slopes to be less than 2:1 and provide stabilization or extend wingwalls to retain the soil. Note 6 on Sheet C 1 states "The maximum allowable slope is 2:1... ". Correct areas where slopes exceed 2:1. 13. The guardrail on the north side of the road was installed within the 2:1 slope. Confirm and certify that this is acceptable and is not a safety issue or relocate the guardrail so it is within the shoulder (to have the proper backfill support). 14. The box culvert is not countersunk 6-inches as required (Detail 3 on Sheet C6) at the inlet or outlet. Submit a recommendation for approval to provide the 6-inch countersinking requirement. Countersinking is required to ensure scouring will not occur under the bottom slab. A possible solution is to install gabion baskets across the inlet/outlet and backfill with riprap. 15. Provide a copy of the DEQ permit for stream impacts, including supporting documentation. 16. Adequate riprap was not installed at the outlet (there was a hole at the outlet with minimal riprap over a considerable area). Submit riprap sizing calculations prior to installing riprap to confirm sizing is correct. Additionally, install the riprap to the limits shown on the approved plan. Thickness of riprap shall meet VDOT minimum standards. 17. Sediment deposits were observed in front of the wingwalls at both the up- and downstream ends of the box culvert. Remove sediment from within the stream limits. 18. The shoulder is slightly higher than the edge of pavement on the south side of the road, which could cause water to pond on the road. Adjust grade of shoulder to ensure positive drainage away from roadway. 19. Periwinkle groundcover is required on the 2:1 slopes. All areas are not fully stabilized. Bond cannot be released until 90% stabilization and groundcover has been established. 20. Correct hatching on as -built survey at the telecom pad. Asphalt hatch is shown over the Engineering Review Comments Page 3 of 3 grassed island and isn't shown over all of the paved areas. Please contact me if you have any further questions or clarifications. Sincerely, Bobby Jocz, EIT Civil Engineer 1 (434) 296-5832 ext: 3283 Department of Community Development 401 McIntire Rd. Charlottesville, VA 22902 Copy: Ana Kilmer, File ksi �jRGSA'ZP COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road Charlottesville, Virginia 22902 Subdivision Bond Inspection Bond Title: Carroll Creek Road File Number: SUB2015-00202 Date of inspection: 7/7/17 Reviewer: Bobby Jocz Original Bond Amount: $425,180 [20%=$85,036] Phone: (434) 296-5832 Current Bond Amount: $425,180 Your bond inspection request has been processed. This list contains an update on the items received and approved. Received Approved Y N Y N NSA vDOT ■ ❑ Completed inspection request and fee ■ ❑ ❑ ❑ ■ ❑ As -built plan, updated, sealed to current date, per As -built policy ❑ ■ ❑ ❑ ■ ❑ Copies of recorded plats for right-of-way, easements ■ ❑ ❑ ❑ ❑ ■ VDOT approval AM-4.3, or partial completion via punchlist ❑ ❑ ■ ❑ ■ ❑ Letter from P.E. certifying improvements are built to plan ❑ ■ ❑ ❑ ■ ❑ Current certification form completed by owner/developer ■ ❑ ❑ ❑ ■ ❑ CBR test reports for each road ■ ❑ ❑ ❑ ■ ❑ Stone depth and material inspection reports (or core tests) ■ ❑ ❑ ❑ ■ ❑ Pavement depth and material inspection reports (or core tests) ■ ❑ ❑ ❑ ■ ❑ Compaction test reports for fill areas under road ■ ❑ ❑ ❑ ❑ ■ Pipe trench inspection reports ❑ ❑ ■ ❑ ❑ ■ Pipe interior inspections reports and video ❑ ■ ❑ ❑ ■ ❑ Concrete test reports for structural concrete, curbing, aprons, etc. ■ ❑ ❑ ❑ ❑ ■ Structural inspection reports for any bridges or box culverts ❑ ■ ❑ ❑ ❑ ■ County road name signs and posts or a sign agreement for alt. posts ❑ ❑ ■ Updated bond amount based on completed work: $111,500 Checklist Items - Carroll Creek 10+00 to 18+97 o Aggregate Base o Asphalt Base o Asphalt Surface 0 5' trail base 0 5' trail surface o Traffic Barrier o Guardrail o Fill Grading o As Builts o Survey and layout Unit Notes Completed Repair Not Built 627.9 Tons IS ❑ ❑ 329.6 tons ■ ❑ ❑ 219.8 tons IS ❑ ❑ 121.3 tons ■ ❑ ❑ 63.7 tons ■ ❑ ❑ 2 ■ ❑ ❑ 1040 ft ❑ ■ ❑ 10889 cy ❑ ■ ❑ 2 ■ ❑ ❑ 2 0 0 0 o Mobilization 1 ■ ❑ ❑ o Materials testing 3 ■ ❑ ❑ o Compaction testing 3 ■ ❑ ❑ o CBR tests 3 ■ ❑ ❑ o Sone Depth Inspections 3 ■ ❑ ❑ o Pavement Inspections 3 ■ ❑ ❑ o Box Culvert Structure 1 ■ ❑ ❑ o Box Culvert Installation 1 ❑ ■ ❑ As -Built Survey and Field Inspection Comments: 1. The guardrail on the trail -side of the roadway from station —12+50 to —14+50 is installed at a height of —21-inches, as measured from the top of the asphalt trail to the top of the guardrail. Confirm and certify that this is acceptable and is not a safety issue or raise the guardrail to meet the minimum design height of 27-3/4". If this is determined not to be a safety issue, update as -built cross -sections to show installed height. The County has not approved opening of the road. Considering the road has been opened, the developer is accepting all risks regarding this deficiency. 2. As -built drawing does not identify the culvert crossing Carroll Creek Drive east of the telecom pad. Revise as -built survey to include this culvert. Provide a detail for the culvert extension. The culvert enters from the south as CMP but exits as HDPE. It is unclear how these culverts are connected under the road and this is typically not acceptable. Additionally, provide positive drainage at the outlet to the stormwater facility. 3. Identify the minimum constructed separation between the asphalt trail and the road edge -of - pavement. Field measurements indicate separation to be approximately 3.5 ft, not 5-ft as designed. Revise road cross section to reflect as -built separation and provide certification that this is not a safety issue. 4. The 5-ft shoulder on the north side of the road was not installed with the approved width. It is approximately 1.5-ft before the 2:1 slope begins. Revise road cross section to accurately reflect as - built shoulder width and provide certification that the reduced shoulder width is not a safety issue. Note 13 on Sheet C 1 of the approved plans state "exceptions will not be allowed." 5. Contours on the as -built survey were measured to be a 2:1 slope. There are areas that exceed 2:1 slope. Note 6 on Sheet C 1 states "The maximum allowable slope is 2:1... ". Correct areas where slopes exceed 2:1. 6. Provide upstream and downstream invert elevations for the box culvert on the as -built survey. Only one elevation is provided and it isn't clear if this is the elevation at the inlet, outlet or some other location within the culvert. 7. Confirm box culvert span and height dimensions. Field measurements indicated these dimensions were not 10'-0" as designed. If dimensions aren't as designed, a revised flood study may be required to confirm backwater elevations. 8. Two water meter valve lids/casings protrude above the asphalt surface near the ACSA entrance. Lower lids/casings so that they are flush with the road surface to avoid damage during snow removal. 9. Drainage ditch on the northeast side of Carroll Creek Drive to the stream was not constructed as designed. Runoff discharges into the wooded area. Install the conveyance channel. 10. Drainage ditch on the southeast side of Carroll Creek Drive from the ACSA access road to the lower ditch was not installed. Even though some of the drainage appears to have been rerouted to the culvert across from the ACSA entrance, signs of erosion are already noted. Install a conveyance channel to adequately convey drainage to the lower channel and ultimately to the stream. The outlet of the lower channel to the stream is heavily eroded and may require a riprap outlet. 11. There is up to a foot of soil retained by silt fence above both headwalls. Correct the grading so the silt fence does not act as a retaining wall. Final grades should not exceed 2:1 slope. 12. Wingwall lengths are shorter than designed, which has resulted in grades exceeding 2:1 at the ends of the wingwalls, where erosion is occurring. Grade the slopes to be less than 2:1 and provide stabilization or extend wingwalls to retain the soil. Note 6 on Sheet C1 states "The maximum allowable slope is 2:1...". Correct areas where slopes exceed 2:1. 13. The guardrail on the north side of the road was installed within the 2:1 slope. Confirm and certify that this is acceptable and is not a safety issue or relocate the guardrail so it is within the shoulder (to have the proper backfill support). 14. The box culvert is not countersunk 6-inches as required (Detail 3 on Sheet C6) at the inlet or outlet. Submit a recommendation for approval to provide the 6-inch countersinking requirement. Countersinking is required to ensure scouring will not occur under the bottom slab. A possible solution is to install gabion baskets across the inlet/outlet and backfill with riprap. 15. Provide a copy of the DEQ permit for stream impacts, including supporting documentation. 16. Adequate riprap was not installed at the outlet (there was a hole at the outlet with minimal riprap over a considerable area). Submit riprap sizing calculations prior to installing riprap to confirm sizing is correct. Additionally, install the riprap to the limits shown on the approved plan. Thickness of riprap shall meet VDOT minimum standards. 17. Sediment deposits were observed in front of the wingwalls at both the up- and downstream ends of the box culvert. Remove sediment from within the stream limits. 18. The shoulder is slightly higher than the edge of pavement on the south side of the road, which could cause water to pond on the road. Adjust grade of shoulder to ensure positive drainage away from roadway. 19. Periwinkle groundcover is required on the 2:1 slopes. All areas are not fully stabilized. Bond cannot be released until 90% stabilization and groundcover has been established. 20. Correct hatching on as -built survey at the telecom pad. Asphalt hatch is shown over the grassed island and isn't shown over all of the paved areas. Please refer to on-line content at http://www.albemarle.org/deptforms.asp?department=cdenawpo for checklists and procedures. 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