February 8, 2000

Mr. William Monhollon

Chief District Engineer

District 5

977 Phillips Lane

P. O. Box 37090

Louisville, KY 40233

Subject: Jefferson County

Central Avenue

Item No. 05-285.03

Post-Construction Review

Dear Mr. Monhollon:

A post-construction review was held on the subject project on Tuesday, January 18, 2000 in the District 5 Conference Room. The following personnel were in attendance:

Bob Sallee Gohmann Asphalt & Construction, Inc.

Mickey Stroub Gohmann Asphalt & Construction, Inc.

R. R. Meyer D-5, Construction T.E.B.M.

Carl Jenkins D-5, Construction

Darrell Tracy James Winstead and Associates

Andre Johannes C.O., Highway Design

Greg Groves D-5, Pre-Construction T.E.B.M.

Robert Semones C.O., Highway Design

Joette Fields C.O., Highway Design

Barry Sanders D-5, Construction

The attendees reviewed the project plans and construction Change Orders. There were 22(twenty-two) Change Orders on the project. An on site investigation followed the meeting. This post-construction meeting dealt with the grade, drain and bituminous surface of Central Avenue in Louisville from Floyd Street to Crittenden Drive.

CHANGE ORDER NO. 1

It was necessary to construct a temporary six-foot tall chain link security fence along two (2) properties that adjoined the project. These properties were an employee parking lot and a bus compound. R/W negotiations were not complete at the time this project began construction and this work was performed as a right-of-way concession.

Contract time was unaffected by this Change Order

Increase $3,071.25

CHANGE ORDER NO. 2

The Louisville Water Company requested that Ductile Iron Pipe 8-inch be installed inside the proposed 18-inch steel encasement pipe that was constructed at the crossing of Central Avenue at Station 179+20 in lieu of the Ductile Iron Pipe 6-inch that was originally required by the contract. It was felt that the 8-inch pipe was needed for future development in the area.

Contract time was unaffected by this Change Order

Increase $4,750.00

CHANGE ORDER NO. 3

Parcel Number 112 located at 2408 Crittenden Drive did not have access to their existing entrance due to the closing of Foster Street. The property owner was not paid to provide interim security and the closed entrance so it was agreed to construct a six-foot tall, twenty-foot wide double vehicular chain link gate at the entrance to this property. This item was overlooked on the initial plans.

Contract time was unaffected by this Change Order.

Increase $648.50

CHANGE ORDER NO. 4

The contractor requested to use silicone joint sealant in lieu of neoprene joint sealant, which was specified by the contract, and also requested to eliminate keyway which were to be constructed in all portland cement concrete pavements. This change was made in order to adhere to current design specifications.

Contract time was unaffected by this Change Order.

There was no net increase or decrease in the project funds for this Change Order.

CHANGE ORDER NO. 5

Unstable soil was encountered during pipe excavation. The unstable soil consisted of silty brown sand, which saturated to nearly a quick condition. The soil would not support the pipe or pipe bedding material. It was agreed to undercut the pipe trenches as needed by a depth of 12 inches. The bottom and sides of the trenches were lined with Type III Geotextile Fabric and the trench was backfilled to a depth of 12 inches with crushed aggregate size number 3. Roadway Excavation quantities were increased due to the undercutting necessary in the pipe trenches. This work was only performed as directed by the Project Engineer and was reviewed on a case by case basis. This area was located toward the west end of the project. The area was isolated from the rest of the project and drill data was not obtained.

Contract time was unaffected by this Change Order.

Increase $7,799.83

CHANGE ORDER NO. 6

A temporary silt fence was constructed on this project in accordance with the Best Management Plan (BMP) for the project as directed by the Project Engineer.

Contract time was unaffected by this Change Order.

Increase $5,985.00

CHANGE ORDER NO. 7

The City of Louisville requested that the right-of-way fence and accessories on the subject project by vinyl coated. This coating was requested in order to match the proposed right-of-way fences on future adjacent projects on the roadway and to enhance the service life for the fence. Therefore, the fence on this project consisted of a six-gauge black vinyl fused and bonded fence fabric and black painted posts, rails and fittings.

The right-of-way fence was to be mounted to the tops of the gravity walls. However, this mounting would result in a hole at the top of the walls, which would have probably led to cracking at each location where the fence was to be mounted on the wall. An alternate method was used to mount the fence on the walls. (See Attached Detail Sheet). It is recommended that the attached detail be used on walls that have a narrow width.

Contract time was unaffected by this Change Order.

Increase $7,789.00

CHANGE ORDER NO. 8

The Contractor requested to use perpendicular transverse pavement joints in lieu of the skewed joint configurations as specified in the contract. This change conformed to the most current version of the Department’s Standard Specifications. This change was adopted at no cost to the Department.

Contract time was unaffected by this Change Order.

There was no net increase or decrease in the project funds for this Change Order.

CHANGE ORDER NO. 9

Unsuitable material was encountered on the subject project between Station 160+20 and Station 161+75. This material consisted of an off-white substance which was friable when wet and resembled clay when moist. This material also had a tendency to swell when moist. The material consisted of byproducts discarded on site by the previous landowner (CSX Railroad), and was determined to be non-hazardous. The material was unsuitable for incorporation on the project and was unsuitable for stockpiling in accordance with the project documents for use on a future adjacent project. Therefore, the material was hauled off site for disposal at an approved site. It was agreed to compensate the Contractor for the additional hauling costs in excess of what it would have originally cost to haul this material to the designated stockpile site in accordance with the project documents. It was felt that enough subsurface investigation was not performed. Again, this work was performed as quickly as possible in order to keep the schedule for the opening of the football stadium.

Contract time was unaffected by this Change Order.

Increase $21,960.00

CHANGE ORDER NO. 10

Due to changed site conditions, it was agreed to compensate the Contractor for extra work needed in order to manipulate the treated (contaminated) soil on the project in order to make the soil suitable for transport and incorporation into an approved waste site.

At pre-bid meetings, it was stated that the soil treatment was to be performed in a small area and that the depth of the treatment would be four (4) feet. Also, a paved parking lot that the soil was located under was to be essentially undisturbed. However, as soil testing commenced, the area of contamination was found to be much larger than expected, and the necessary depth of treatment doubled. As a result, most of the existing paved parking lot had to be removed and much larger quantities of liquid treatment chemicals had to used in order to adequately complete this work.

The contractor had intended to use the paved parking lot as a staging area, but since this parking lot was removed, the contractor had to construct a haul road in order to bring equipment into the work area. This would not have been necessary if the existing parking lot was still intact.

Due to the extra quantities of liquid chemicals used for this treatment, the remaining treated soil was mostly saturated and unstable. The treated soil had to be dry to be acceptable for transport and incorporation into an approved waste site. In order to perform this drying, the Contractor had to work the soil into large mounds.

Contract time was unaffected by this Change Order.

Increase $12,572.39

CHANGE ORDER NO. 11

And additional sanitary sewer manhole tie-in was needed at Lt. Station 172+20. The tie-in was for a six-inch sanitary sewer line that serves Parcel 104 adjacent to the project. The project documents did not indicate that this work was to be performed, however, the existing six-inch service line was found to tie directly into an existing manhole that was designated to be replaced. The existing manhole was discovered to be brick lined and in poor condition. Therefore, it was agreed to replace the manhole.

Contract time was unaffected by this Change Order.

Increase $372.30

CHANGE ORDER NO. 12

The City of Louisville requested that gravity walls constructed alongside Central Avenue have the exposed side (front face) to a depth of 12 inches below the proposed finished grade, have uniform texturing via the use of form liners. This work was requested in order to provide a suitable match for other proposed masonry treatments to be used on future projects along this roadway corridor. The treatment is expected to reduce the likelihood of the walls being defaced.

Contract time was unaffected by this Change Order.

Increase $23,454.24

CHANGE ORDER NO. 13

The contract documents for the project indicated that a fence that runs along side Crittenden Drive from Rt. Station 130+00 to Rt. Station 143+10 was to be removed and reset. This fence provides security for the Kentucky Fair and Exposition Center, which is adjacent to the project. The existing fence was located well within the proposed right-of-way and the ultimate location for the fence was along the proposed right-of-way, which was an area that received a berm treatment. This situation made it necessary to remove and reset the existing fence twice in order to maintain adequate continuous security for the Kentucky Fair and Exposition Center during the construction of this project.

Contract time was unaffected by this Change Order.

Increase $7,266.00

CHANGE ORDER NO. 14

A section of exposed grade from Station 156+61 to Station 158+80 was found to be unstable. The Geotechnical Branch of the Division of Materials recommended removing the existing treated soil type material down to the founding in-situ clay layer and placing Type III Geotextile Fabric. This area was then brought up to the proposed subgrade elevations with shot rock. This area was too wet to successfully use the proposed soil treatment scheme with lime.

Oil drums and other possible contaminants were discovered while performing geotechnical investigations on site between Station 160+00 and Station 162+00. As a result of extremely unstable soil in this area, a series of special temporary access roads leading to this area had to be constructed in order to allow the environmental consultant access to this area in order to perform required testing and sampling. This work resulted in the necessity to use a large quantity of shot rock.

Contract time was unaffected by this Change Order.

Increase $198,113.66

CHANGE ORDER NO. 15

The contract documents for the project required construction of a storm sewer under Central Avenue from Station 156+61 to Station 159+88. The existing soil in this area had been treated for lead contamination in accordance with the project documents. However, after the treatment was completed, the remaining groundwater was tested and was found to contain large amounts of lead. It was necessary to construct a base pad, mobilize a frac tank on site, and pump and store the water on site until a proper disposal method for this fluid could be determined. This work was performed in order to construct the proposed sewer in a safe and expedient manner.

Also, in order to construct a stable drainage system in this area, it was necessary to use crushed aggregate size No. 57 as pipe bedding and as a backfill material. Native materials excavated from the pipe trenches could not be used as pipe backfill, therefore, it was agreed to backfill the pipe trenches with crushed aggregate size No. 57. The crushed aggregate size No. 57 was only paid when it was used to backfill the pipe trenches (in the above area) in excess of the quantity that was required for the standard pipe bedding procedures.

Contract time was unaffected by this Change Order.

Increase $14,845.65

CHANGE ORDER NO. 16

A field review of the project showed that there were areas of unstable subgrade in the area where the existing Crittenden Drive was widened at Rt. Station 143+53 and Rt. Station 146+61. This area was undercut by a depth of two (2) feet and geotextile fabric type III was used and backfilled with Crushed Aggregate Size No. 3. An edge drain type system consisting of perforated 4-inch pipe and 4-inch non-perforated pipe was installed in this area in order to maintain roadway stability.

An additional area of unstable subgrade was encountered between Station 136+00 and Rt. Station 143+53. Undercutting was not required in this area, however, in order to maintain roadway base stability, a layer of geotextile fabric type III was installed on the subgrade before the Dense Graded Aggregate was placed.

Contract time was unaffected by this Change Order.

Increase $9,079.00

CHANGE ORDER NO. 17

The contract documents did not address any special traffic control considerations for holidays, local or regional events and festivals, or special event coordination for the Kentucky Fair & Exposition Center for any of the roadways involved with the project construction activities. The contractor requested to remove a lane closure from Crittenden Drive on April 24, 1998 in order to restore the traffic capacity of this roadway for the volume of traffic expected for the Kentucky Derby. The contractor was directed to shore up the vertical drop off immediately adjacent to the back of curb in this area. It was agreed to compensate the Contractor for this additional work and for the reestablishment of the original lane closure along Crittenden Drive after Derby Weekend.

A field review of the project showed additional areas of unstable subgrade in the area where the existing Crittenden Drive was to be widened. It was necessary to undercut this area by a depth of one (1) foot and use Geotextile Fabric Type III along with a backfill of Crushed Aggregate Size No. 3. An edge drain system consisting of perforated and non-perforated pipe 4 inch was installed and connected to the drainage system improvements in order to maintain future roadway stability.

Contract time was unaffected by this Change Order.

Increase $12,876.49

CHANGE ORDER NO. 18

Crushed barrels containing oil were encountered on the project. The Division of Environmental Analysis and the Superfund agencies were contacted regarding this matter. LAW Engineering was retained as an advisor to the Department in order to help proceed with the mitigation process for the contamination found in this area. Subsequent testing undertaken by LAW Engineering showed that the ground fluids found in the immediate vicinity of the oil-containing barrels contained PCBs. Also, soil in isolated areas had been found to contain leachable lead, which had to be treated in order for the soil to remain in place. It was agreed to pump the PCB-containing ground fluids out until a total quantity of PCBs in the fluids was less than 5 parts per million and properly dispose those fluids at an approved facility.

The existing soil between Station 160+00 and 162+00 was very unstable and had to be undercut 12 inches and further reinforced in order to be able to support the proposed road. This unstable material was stripped and moved to an approved facility.

The project documents indicated construction of a stormwater drainage system between Station 160+00 and 162+00. Due to the likelihood of unstable soil conditions and the need to drain and monitor ground fluids in this area, it was agreed to use Crushed Aggregate Size No. 57 as a pipe bedding and backfill material. The material excavated

during the construction of the storm sewer was not acceptable for use on this project. Nor was it acceptable for use on the proposed Phase II construction of Central Avenue on the west end adjacent to this project. It was therefore necessary to haul the excavated material to an approved site as "Special Excavation".

The ground fluids encountered in this area are likely to contain petroleum-based materials, which needed to be kept out of the storm sewer system in order to prevent deterioration of the pipe joint materials. It was agreed to use the flexible butyl resin sealant "ConSeal CS-440" manufactured by Concrete Sealant, Inc. to seal the reinforced concrete culvert pipes.

It was agreed that the work performed in this Change Order resulted in a net increase to project moneys. Therefore, the project completion date was changed from the original date of August 1, 1998 to August 17, 1998. Furthermore, it was agreed to increase the working days allotted on the contract from the original amount of 125 working days to 135 working days.

Increase $152,314.52

CHANGE ORDER NO. 19

Change Order Number 14 established funding for the undercutting and treatment of unstable subgrade between Station 156+61 and 160+00. In order to minimize the amount of water, which needed to be excavated and disposed of, it was agreed to limit the undercutting in this area to a depth of 12 inches below the original subgrade. As a result, Type III Geotextile Fabric alone was not strong enough to adequately stabilize the remaining subgrade. It was agreed to use and additional layer of the woven geotextile product "CEF 2044" produced by Amoco due to its high strength characteristics.

Additionally, the section of roadway between Stations 160+00 and 162+50 was designated to be undercut 12 inches as well. This area was also very unstable and also required the use of the high strength geotextile fabric.

In both of the preceding areas the high strength geotextile fabric was not pinned. The seams were sewn together in accordance with the manufacturer’s recommendations in order to avoid breaking any seals between the underlying material and the roadway subgrade/stabilization materials. Also, the Type III Geotextile Fabric in these areas was not pinned. They were lapped as directed and immediately covered with subgrade/stabilization materials.

Additional quantities of the contract items "Fabric-Geotextile Type III" and "Crushed Aggregate Size No. 3" were needed in both of the aforementioned areas in order to complete construction as dictated by the existing site conditions.

An impermeable barrier needed to be constructed between Stations 160+00 and 162+50 as a result of the work plan that was approved by the Superfund agency. It was agreed to install an 8-mil polyethylene barrier on the remaining materials in this area after the storm system was completed and after the high strength geotextile fabric was installed. This impermeable barrier extended full width under the roadway from right-of-way line to right-of-way line.

Geotextile Fabric Type III was installed directly on top of the completed Water Barrier and a subgrade drainage system was installed to ensure that roadway runoff did not remain in the roadbed and intermingle with the native ground fluids.

Change Order Number 15 established a funding method for pumping and temporary storage of contaminated ground fluids. It was necessary to remove these fluids from their temporary containers (frac tanks) on the site and properly dispose of these fluids at an approved site.

Change Order Number 15 also established the funding for the payment of daily frac rental. The original price for the supplemental item "Frac Tank Rental" was negotiated assuming that the frac tanks would each remain on the project for a period equal to or greater than 30 calendar days. The second frac tank brought on site was not

needed after 18 days and was emptied, cleaned and removed. This meant that the rental rate for the second frac tank is more than the rental rate, which was originally assumed. It was agreed to compensate the Contractor for the revised rental rate.

Change Order Number 18 established the funds to perform the initial cleanup and remediation necessary for the area of contamination located between Stations 160+00 and 162+50. However, it was necessary to install a form of sump well in this area so that the quality of the ground fluids could be monitored and removed as necessary. It was therefore agreed to construct a sump/monitoring well 36 feet right of Station 160+25. It was agreed that the City of Louisville would perform all subsequent groundwater monitoring and removal.

The project documents indicated that a 4-inch concrete sidewalk (approximately 10 feet wide) be constructed along the back of the curb of Central Avenue throughout the length of the project. However, the City of Louisville requested that the contractor broom finish the sidewalk and then "smooth trowel" the sidewalk into 5 foot-by-5 foot squares.

Additional conduit and junction boxes were added at three locations along Central Avenue in order to provide for electrical crossings for the lighting which the City of Louisville will install in the future.

There was an existing 12-inch water main, which runs parallel to Floyd Street. This water line was shown on the plans, however, when the water main was uncovered, it

was found to be approximately 18 inches higher than what was indicated on the contract plans. Due to the condition of this water main it was necessary to remove a section of it and install a new replacement water main at a lower elevation.

Provisions were made for the cleanup and subgrade stabilization of Central Avenue between Station 160+00 and 162+50. The undercutting, geotextile fabric and aggregate stabilization materials were not sufficient to provide a stable enough subgrade to place Dense Graded Aggregate or pavement. It was agreed to construct a 4 inch thick course of Cement Treated Base in this area in lieu of the Dense Graded Aggregate.

The additional work from this Change Order resulted in a net increase to the project moneys. The project completion date was extended from August 17, 1998 to September 3, 1998 which is a net increase of (seventeen) 17 calendar days. It was further agreed to increase the contract Working Days from 135 to 148, which is a net increase of thirteen (13) working days.

Increase $123,390.75

CHANGE ORDER NO. 20

It was necessary to increase several contract items in order to complete the construction of this project as site conditions necessitated. The increase quantities of items were representative of the actual field measured items and were necessary in order to bring the respective items up to the actual final estimate pay quantities.

Contract Working Days were unaffected by this Change Order.

Increase $197,711.12

CHANGE ORDER NO. 21

Change Order Number 19 established the methodology and supplemental items to properly address contaminated materials found on this project. Due to several factors, a workable means of addressing these materials was not decided upon until very close to the completion of the project. The Contractor had to work additional overtime in order to complete the project on schedule. It was agreed that the Department would reimburse the Contractor for additional wage expenses incurred over what originally had been realized for the project.

Contract Working Days were unaffected by this Change Order.

Increase $51,600.15

CHANGE ORDER NO. 22

The Contractor was requested to use high early strength cement concrete mixes in the pavement in order to expedite the contract as much as possible.

Due to an approximate eight (8) day delay while a method of action was being finalized in the special excavation area on the project, it was necessary to compensate the Contractor for idle time for a piece of rental equipment.

It was agreed to increase quantities for "Roadway Excavation". This increase was necessary to account for the material which had to be brought back on site to fill the gravity walls on both sides of Central Avenue at Floyd Street from Station 156+91 to Station 159+75 after all the unsuitable material had been removed and disposed of.

It was also agreed to increase the quantities for "Crushed Aggregate Size No. 57". This additional material was needed to backfill both of the above mentioned gravity walls due to the fact that weep holes could not be installed in them. The weep holes were omitted in order to prevent the leakage of potentially contaminated groundwater out onto the adjacent sidewalk.

The Contractor was compensated for removing lead contaminants from the 42-inch storm sewer, which was constructed on the project. A portion of this storm sewer had been constructed before the project was delayed due to contaminated soils being encountered. As a result of the delay, the pipe was temporarily bulkheaded and remained in contaminated ground fluids for several weeks. This resulted in unacceptable levels of lead on the interior face of the pipe, which had to be removed by specialized methods, and specially trained personnel.

It was agreed that the work from this Change Order resulted in an increase to the project funds. It was also the judgment of the Project Engineer that the time required to perform the work in this Change Order exceeded the ratio of the original contract amount-to-original contract time as specified in the Kentucky Standard Specifications. Therefore, the specified project completion date was changed from September 3, 1998

To December 28, 1998 which was a net increase of 116 Calendar Days. The monetary increase represented by this Change Order and all preceding Change Orders was not used to assess any additional contract time.

Increase $49,028.19

Additional comments from this post-construction review were as follows:

The Contractor would like to see the Department take a harder stance on utility companies when their utilities are not removed or relocated in a timely manner. Also, all right-of-way should be cleared before construction begins.

The Contractor expressed his opinion that it would be beneficial if there was a Standard Drawing for right-of-way fence post installation.

The Contractor expressed concerns that there was not enough investigation and testing performed prior to the beginning of construction on this project. Construction on this project was performed during the winter months and it was felt that the City of Louisville might have needed more guidance from the Department.

It was recommended that drill data be obtained at questionable locations on a project.