FILEP.I. No. 0007414, Camden County Officeengineering Services

D E P A R T M E N T O F T R A N S P O R T A T I O N

S T A T E O F G E O R G I A

INTERDEPARTMENT CORRESPONDENCE

FILEP.I. No. 0007414, Camden County OFFICEEngineering Services

Project No. CSSTP-0007-00(414)Atlanta, Georgia

Widening/Reconstruction – CR 90/Colerain Road from

West of I-95 to East of Kings Bay Road

DATEJuly 14, 2016

FROMLisa L. Myers,Project Review Engineer

TOAlbert V. Shelby, III, State Program Delivery Engineer

Attn.: Cassius Edwards

SUBJECTREVIEW OF CORRECTED FFPR PLANS (18 WEEKS)

Our office has reviewed the submission of final plans and has the following comments:

Comments from FFPR Report requiring further action:

SPECIAL PROVISIONS

ADDITIONAL PROJECT SPECIFIC SPECIAL PROVISIONS REQUIRED:

Section 639 – Strain Poles for Overhead Sign and Signal Assemblies

Section 647 - Traffic Signal Installation

Section 660 – Sanitary Sewer System

Section 670 – Water Distribution System

The above mentioned SP’s were not included with this submittal. Ensure they added to the PS&E Package for Final Plans.

GENERAL SPECIAL PROVISION COMMENTS:

(Original Comment) The District 5 Construction Office requests the restrictions to traffic interruptions be revised to:

The Contractor shall not install lane closure; perform flagging, or move equipment or materials on the travel way that interferes with traffic between the hours of 7:00 A.M. to 8:30 A.M. and 2:30 P.M. to 4:00 P.M. Monday through Friday.

I-95 shall not have double lane closures installed or pace traffic between 7am and 7pm. Single lane closures on I095 are permitted 24 hrs a day.

(Original Response)MAAI will revise Special Provision Section 150.11 to restrict traffic interruptions as requested:

I-95 shall not have double lane closures installed or pace traffic between 7am and 7pm. Single lane closures on I095 are permitted 24 hrs a day.

(New Comment) Not done. Ensure the 150.11 is updated prior to submitting the PS&E Package.

CONSTRUCTION PLANS

05-XXX TYPICAL SECTIONS

General Comments

Per the GDOT Pavement Design Manual, if paving material is supplied from Florida or soil cement, top soil or other soil bases are used, then showa Square Yard measure for payment if weighing is inconvenient. IfSquare Yard measurement is specified, the typical section shall beclearly dimensioned along the top finished surface and dimensionsnoted as the “Width of Payment.” Show the GAB Pay Limits for each applicable Typical Section.

Per the GDOT Pavement Design Manual, MAAI will showa Square Yard measure for paving material, soil cement, top soil and other soil bases used. The typical section shall beclearly dimensioned along the top finished surface, dimensionsnoted as the “Width of Payment.” and GAB Pay Limits labeled for each applicable Typical Section.

Not done. GAB is shown by the Ton.

06-XXX SUMMARY OF QUANTITIES

Drawing 06-001

Revise the standard number to show 4948b in the Concrete Barrier Items summary box.

The CONCRETE SIDE BARRIER shown in the plans are “slant face” TYPES 2-S, 2-SA, & 2-SB. Current GDOT drawings do not reference Std number. MAAI will label as GASTD 4948B.

The Standards included in the plans are the regular 4948 Standards for Jersey Face. Add the special “S” Type Wall details.

Drawing 06-023

Change Remove & Reset to Remove & Replace.

MAAI will revise Highway Signs Remove & “Reset” to Remove & “Replace”.

Not done.

10-XXX TRAFFIC DIAGRAM SHEETS

The District 5 Traffic Operations recommends dual lefts onto Kings Bay Road.

MAAI will analyze HCS for dual lefts from Colerain Rd eastbound onto Kings Bay Road using the year 2019 Peak Hour Traffic of 335 as shown on Traffic Diagram drawing 10-004. It was discussed at the FFPR to look at converting the Colerain Rd inside eastbound thru lane to the second left turn lane versus adding another lane. This scenario will require HCS analysis of the thru and right turn lane movements with the year 2019 Peak Hour Traffic of 390 and 65 respectively. MAAI will submit results to GDOT for review, comment and or approval prior to revising plans.

Has this been completed and submitted to D5 Traffic Operations?

11-XXX CONSTRUCTION LAYOUT/STAKE-OUT SHEET

The AASHTO Green Book recommends the use of horizontal curve lengths at or greater than about 15 times the design speed (expressed in mph). Curves 2, 5, 113, and 105 do not meet the AASHTO recommended minimum length for horizontal curves. The designer should ensure that horizontal curves less than about 15 times the design speed have been selected based upon sound engineering analysis. A record of decision documenting the design judgment criteria used to justify the use of substandard curve lengths should be included in the project design records.

Based on the above comment all Colerain Rd horizontal curve lengths should be at least 45 MPH x 15 = 675 feet. Although Curve 2 has an arc length of 601.10 feet the radius is 32683.79 feet. This curve in conjunction with the reverse Curve 1 having a radius of 32071.76 is used to transition the two-lane existing to the proposed four lane divided Colerain Rd. To achieve the 675 foot arc would require even flatter radii which would extend the project limits.

Curve 5 has an arc length of 210.26 feet with a radius of 7000 feet. Being approximately concentric to the existing Colerain Rd. this alignment allows for constructing the proposed 20 foot median and two eastbound lanes right of and converting the existing two-way roadway to two westbound lanes. This scenario allows for simpler stage construction. To achieve the 675 foot arc would result in an alignment that requires additional required right of way and or more complex stage construction.

Although Curve 113 has an arc length of 410.58 feet the radius is 11459.16 feet. This curve compounds with a curve having an arc length of 2694.54 feet and a radius of 66000.00 feet. The large radii and total arc length of 3105.12 feet meet the AASHTO requirement for minimum curve length.

Although Curve 105 has an arc length of 460.33 feet the radius is 10000.00 feet. This alignment allows for transitioning the construction of the proposed 20 foot median and two westbound lanes left of and converting the existing two-way roadway to two eastbound lanes to the construction of the proposed 20 foot median and two eastbound lanes right of and converting the existing two-way roadway to two westbound lanes. To achieve the 675 foot arc would result in an alignment that requires additional length for the crossover. The longer crossover adversely impacts the staging by reducing the length of permanent pavement that can be constructed unless additional temporary pavement is used to maintain traffic.

Curves 2, 5, 113 and 105 have normal crown cross slopes, therefore superelevation is not a factor.

Ensure that the above explanations are documented in the form of a deviation for the project files.

13-XXX MAINLINE ROADWAY PLAN SHEETS

Drawing 13-001

Verify that there isn’t a low point being induced in the SE quadrant of the intersection between Colerain Road and Relocated Local Service Road No. 2.

MAAI will verify that there isn’t a low point being induced in the SE quadrant of the intersection between Colerain Road and Relocated Local Service Road No. 2.

Has this been verified?

Drawing 13-002

The Office of Roadway Design suggests changing the Wheel Chair Ramp at about STA 35+00 RT to a modified B ramp to align better with the northeast and southwest quadrants. As shown it is oriented to the northeast quadrant only but the Signing and Marking Plan Drawing No. 26-003 shows it being connected by crosswalks to both quadrants mentioned. This comment also applies to Mainline Plan Drawing No. 13-003 refer to Signing and Marking Plan Drawing No. 26-004 at the ramps intersection.

MAAI will verify all WCR and crosswalk alignments. MAAI will verify the WCR type(s) in the southwest quadrant.

Not done. Either change to a Mod B or add a second ramp.

Drawing 13-003

WCR should be parallel to crosswalks, i.e. direct pedestrians into crosswalk. Determine if the WCR on the east side of the I-95 NB On Ramp can be shifted to better align with crosswalk.

MAAI will verify all WCR are parallel to crosswalks.

Not done. The ramp in the NE quad needs to better align with the crossing. Rotating about 5 feet clockwise should be enough.

Drawing 13-004

Verify that there isn’t a low point being induced in the SE quadrant of the intersection between Colerain Road and Access Road A.

MAAI will verify that there isn’t a low point being induced in the SE quadrant of the intersection between Colerain Road and Access Road A.

Has this been verified?

Drawing 13-005

Add concrete spillways (GA STD 9013) at the end of curb and gutter along Christina Lane.

MAAI will add concrete spillways (GA STD 9013) at the end of curb and gutter along Christina Lane.

Not done.

Drawing 13-007

Verify that there aren’t low points being induced in the radius returns in the SE quadrant of Wildcat Blvd and the SW quadrants of the driveways @ 115+01 and 116+95.

MAAI will verify that there aren’t low points being induced in the radius returns in the SE quadrant of Wildcat Blvd and the SW quadrants of the driveways @ 115+01 and 116+95.

Has this been verified?

Drawing 13-010

Verify that there isn’t a low point being induced in the radius returns in the SW quadrant of Settlers Hammock Way.

MAAI will verify that there isn’t a low point being induced in the radius returns in the SW quadrant of Settlers Hammock Way.

Has this been verified?

Drainage STRs DD1, DD2, DD3, and the 30” RCP between them is off R/W. All permanent drainage STRs should be placed on R/W.

This existing drainage was originally on private property. The 7/19/2013 right of way plan revision added the existing right of way for Settler’s Hammock Way per plans obtained from the Camden County. The relocated drainage on Parcel 41B shown and labeled as Easement for Construction of Drainage (temporary) will need to be revised. MAAI will check the R/W acquisition status to see if the Parcel is closed and if we need to make the revision under another Parcel number.

What was determined?

Drawing 13-012

It was requested during the PFPR to add an additional WCR to both the NE & NW quadrants to better align with 2 crosswalks. The response was will evaluate crosswalk alignments with respect to WCR’s. The WCR’s are located to avoid impacting the existing signal mast arm poles to remain. Additional WCR is still needed.

MAAI will add additional WCR.

Not done.

It was pointed out during the PFPR that the curb and island at drive STA 182+50 RT will be damaged during construction. Show to repair and tie to existing. The response was will show driveway reconstruction for proposed pipe and add Easement for Construction of Driveway as required. Replacement of curb and island not shown.

The line work for reconstruction of the pavement and curb and gutter required for the installation of the 42” pipe is shown per Ga Std 1030D. The line work for reconstruction of the median nose to accommodate the proposed sidewalk is shown. MAAI will label accordingly.

Not done. Show C&G with dark solid line until past the proposed pipe.

Drawing 13-019

Verify if driveway and gate at STA 280+00 LT is being relocated.

The driveway at STA 280+00 LT is being relocated to Sta 283+56 LT to eliminate the severe skew angle. MAAI will verify if property owner is being compensated for gate in R/W negotiations.

No proposed gate shown. Has we verified that the this was handled cost to cure. If not we do not want a supplemental for a gate.

19-XXXCONSTRUCTION STAGING & STAGING CROSS-SECTION PLAN SHEETS

General Comments

Add a note that the moving of signals during staging is the Contractor’s responsibility with no additional cost to the department.

MAAI will add a project specific note to section 4 stating “Any adjustment of existing traffic signal(s) to maintain traffic as shown in the Construction Staging Plans shall be the Contractor’s responsibility at no additional cost to the department.”

Not done.

Drawing 19-001

Stage 1

Water is trapped in median @ STA 70+50 (19-004 & 19-048).

MAAI will verify if water is trapped in median @ STA 70+50 (19-004 & 19-048) and add temporary drainage structures as necessary.

Not done.

Water in median travels from STA 236+00 to STA 219+00 before it can escape. Determine if a temporary pipe is needed, (19-015, 19-016, 19-091, and 19-096).

MAAI will verify if additional temporary drainage structure(s) and outfall(s) are required in the temporary 2’ FB ditch between STA 236+00 to STA 219+00 (19-015, 19-016, 19-091, and 19-096).

Not done.

20-XXXCONSTRUCTION STAGING DETAILS

General Comments

The temporary pavement shown above the retained existing pavement appears to be constructed of leveling but on the Typical Section Drawing No. 05-14 for temporary pavement only full depth pavement sections are shown. Also the hatching used on the staging plan drawings depicts temporary full depth pavement. For example see cross sections from STA 164+50 to 165+50.

MAAI will add a temporary pavement typical section depicting areas of overlay & leveling. The temporary pavement legend does not differentiate between full depth or overlay and leveling. The hatching used on plans 19-010 & 011 reflect the overlay and leveling or full depth temporary pavement shown on cross sections 19-075 to 078. All faded back line work will be darkened for clarity.

Not done.

Drawing 19-091

Temporary concrete barrier are placed incorrectly. For example see STA 220+50 where it is shown as been buried by the construction fill and some barrier is shown being placed in the temporary ditch. This comment applies to other cross section showing similar situation.

Temporary concrete barrier shown at Sta 219+50, 220+00 and 220+50 is only required for construction of the cross drain. Once the pipe is placed, backfilled and the ground brought back to grade the temporary barrier can be removed. A note to this effect will be added to all applicable cross sections.

Ensure this note has been added.

Drawing 19-229

Proposed permanent pavement is shown being constructed under the temporary concrete barrier. For example see STA 37+50. This comment applies other cross sections with the same situation.

The temporary barrier is located on the 2’ grass shoulder of Stage 2 construction (19-171 to 176). The barrier will remain in place until the left side of Colerain Road is brought up to grade. MAAI will show the Stage 2 left shoulder and slope line work on the corresponding Stage 3 cross-sections.

Not done. The barrier is clearly sitting on area hatched as “under construction.”

22-XXXDRAINAGE PROFILES

General Comments

Add hydraulic grade line for longitudinal systems.

MAAI will add hydraulic grade line for longitudinal systems.

Not done.

Add design year velocities at outfalls.

MAAI will add design year velocities at outfalls.

Not done.

Drawing 22-051

Show HW elevations.

MAAI will add HW elevations.

Verify that minimum freeboard is met per the GDOT Drainage Manual, Section 12.1.1 – Subsection 4 - Freeboard for Road Subgrades. Anywhere that minimum freeboard cannot be met will required a Design Variance for the Drainage Manual.

Drawing 22-059

Show HW elevations.

MAAI will add HW elevations.

Drawing 22-059

Verify the structure type for STR T4.1.

STR T4.1 is a Ga Std 1033G catch basin for use with curb (6”mountable) & gutter located in the concrete median.

Label has been left off.

Drawing 22-076

Show HW elevations.

MAAI will add HW elevations.

Not done.

Drawing 22-077

Reference where to find details for STR DD1.

MAAI will add and reference to details for STR DD1.

Not done.

Drawing 22-086

The proposed ground does not appear to be drawn correctly between GG10 and GG11.

MAAI will revise proposed ground to reflect raised median between GG10 and GG11.

Not done.

Drawing 22-107

Show HW for cross drain YY.

MAAI will add HW elevations.

Drawing 22-123

Show HW for cross drains GGG and HHH.

MAAI will add HW elevations.

23-XXXCROSS SECTIONS

Drawing 23-006 to 23-008

The cross sections in this section look like the existing ground is been extended to meet toe of the proposed slope indicating existing topography does not exist in this area. This comment applies to other cross sections with the same situation.

MAAI will verify existing ground lines.

Has this been verified?

24-XXXUTILITY PLANS

General Utility Comments:

Provide Utility Legend Sheet in front of the Utility Plans.

MAAI will add Utility Legend Sheet.

Not done.

26-XXXSIGNING AND MARKING PLANS & DETAILS

General Comments

For ALL signs flagged as Remove & Reset, if these are standard MUTCD signs they shall be replaced to ensure current retro-reflectivity standards are met.

MAAI will replace ALL MUTCD signs flagged as Remove & Reset to ensure current retro-reflectivity standards are met.

Not done.

Multi-use path signs are not shown.

MAAI will add applicable Multi-use path signs.

Not done.

Drawing 26-003

Approval will be required by the Bridge Office for remounting sign to new bridge. Previous request have been denied and Type 1 structures were added to the plans. Clearance Diagrams are not included in the plan set and will need to be submitted to the Office of Bridge Design.