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of 6 FLOOD INVESTIGATION INVENTORY SHEET Flood Investigation # 1510082007722 Entry Date: 10/8/2007 2:39:57 PM Revised Date: 7/13/2015 3:11:20 PM Completed By: Hiren Patel, PBS&J SECTION I: LOCATION County - Pinellas State Road - SR 55 Road Description - 6 lane(s), Principal Arterial, Roadside Ditches Roadway Separation - Divided w/traversable Median Direction of Travel - Two-Way Functional System of Road - Rural Specific Classification of Road - Principal Arterial Roadway Drainage - Roadside Ditches Flooding Condition - Off-System Local Road Subject to Flooding - Business Name: Curlew Crossing Shopping Center Business/Private Property Address Subject to Flooding - 30218 US Highway 19 N Clearwater, FL 33761 Location: Latitude: 28.04695 Longitude: -82.73833333333 Section/Township/Range - 18 / 28S / 16E Project is Active - No Associated Projects Project Date State Project Number Financial Project ID Work Program ID Project Description Attachment 8/15/2001 15150-3546 403771-1 - 52-01 Resurfacing SPN15150-3546roadwayplans.pdf SECTION II: PROBLEM DESCRIPTION Date of Original Complaint - 11/14/1997 Complainant Name - Dave Gingrich Problem Description - Property Flooding

of 6 Details of the Problem - Complaint Filed 11/14/1997: Mr. Dave Gingrich of USAA Realty, on behalf of the Curlew Crossing Shopping Center, located on the southwest corner of the Curlew Road/US 19 intersection, had complaints of parking lot flooding. He believes water from US 19 ditches seeps into the ground in heavy rains and drains directly onto the significantly lower parking lots of Applebee's, Atlanta Bread Company and Kwanda Asian Bistro. In addition, there is no outfall for the ditches to the north and south of the shopping center access road and ditch overflow rushes down this road into the parking lot. The recent (2001) pavement additions on US 19 have added to the problem. Complaint Filed 1/15/2004: Mr. Gingrich believes water from the US 19 ditches seep into and thru the berm during heavy rains and drains directly onto the significantly lower parking lots of Applebees, Atlanta Bread Company, and Kwanda Asian Bristo. In addition, there is no outfall for the ditches to the north and south of the shopping center access road and ditch overflow rushes down this road into the parking lot. The recent (2001) pavement additions on US 19 have added to the problem. Frequency of Flooding - Several times per year Source for Frequency Data - Local Resident/Person Interviewed Historic High Water - No historic high water data was available. Flooding Event High Water - No event high water was recorded. History of Problem - First complaint was in 1997 per Mike Skrzypkowiak, a former FDOT maintenance employee who responded to the original complaint of overflow from the ditches running onto adjacent property by installing a berm along the backside of the US 19 west side swale. Persons Interviewed Site Visit Date - 11/14/2003 Site Inspection By - Shayne Paynter, PBS&J Interviewee(s) - Dave Gingrich, USAA Realty Site Visit Conditions - Not Applicable Observed High Water - No observed high water was observed on the date of the site visit. Site Visit Details - The area immediately west of US 19 is substantially lower than the roadway and drains to a low point to the southwest. From this point, runoff flows south in an existing ditch. From Curlew Road south approximately 700 feet (ft), a US 19 roadside swale collects runoff. There is no outfall for this ditch and water must either percolate out or rise high enough to spill into the shopping center access roads and into the area parking lots. A berm was constructed by FDOT maintenance circa 1998 to prevent water from overtopping the ditch top of bank to the west. Prior to the berm construction, water could overtop the berm along its length and diffuse over the property, as it historically has done. Because the berm was constructed higher than the roadway access roads, the only

of 6 outlet for the ditch runoff is at the access roads and into the shopping center property. In effect, the discharge characteristics have been altered from discharging all along the property in small amounts to discharging at two places in a larger amount. Because the drop is so steep and the berm relatively narrow, water can also percolate from the ditch into the parking lot. Although the permitted (SWFWMD Permit No. 44022085.00) plans show ditch blocks and baffles at both the Home Depot access road, approximately 350 ft north of Congress Avenue, and at the Applebee's/Atlanta Bread Company access road, approximately 800 ft south of Curlew Road, only the one at the Home Depot access was constructed. Per Mark Gillette of Greenhorne & O'Mara, no ditch work or ditch blocks were completed north of the Applebee's access road due to conflicts with a very shallow antiquated water main. Compensatory treatment was provided for this stretch of US 19 in other ditch locations. SECTION III: PROBLEM ANALYSIS Previous Analysis Previous Analysis By: Mike Skrzypkowiak, FDOT Maintenance on 11/14/1997. Previous Analysis: First complaint approximately 7 years ago (circa 1997) per Mike Skrzypkowiak, a former FDOT maintenance employee who responded to the original complaint of overflow from the ditches running onto adjacent property by installing a berm along the backside of the US 19 west side swale. Current Problem Analysis Current Problem Analysis: It appeared that either the side drain located immediately south of the Home Depot access was located in the wrong place or the access road was not constructed per plan. Outfall Description: Other Responsible Entity for Maintenance of Outfall: FDOT Attachment Attachments Attachment Description

of 6 254145046_DrainageComplaintInventorySheet02.pdf 25411101_Sitephotos.pdf FloodInventory_Pr.pdf SPN15150-3546originalcomplltr.pdf 8094840_SWFWMDAerial.pdf SPN1510-3546drainagemap.pdf Attachment Type Site Photo SWFWMD Contour Map FDOT Drainage Map Drainage Complaint Inventory Sheet and site photos Flood Inventory Database Sheet for original complaint that has now been combined with this file. Original Complaint - Drainage Complaint Sheet Original Complaint - SWFWMD Aerial Contour Map Original Complaint - Drainage Maps SPN15150-3546photos.pdf Site Photo Original Complaint - Photos DraftLetterToCurlewCrossings.pdf EmailOfProposedConstruction.pdf sheet 20.pdf Sheet 5-7.pdf sheet 25.pdf sheet 26.pdf Media File Media File Original Complaint - Draft Letter mailed to Curlew Crossings Original Complaint - Email correspondence from GEC to D7 regarding proposed construction Original Complaint - Plan sheet showing proposed bleeder side drain pipe at southern drive entrance Original Complaint - Plan sheet showing proposed bleeder side drain pipe at northern drive entrance. The proposed 0.5-foot high earthern berm is also shown on this sheet. Original Complaint - Cross Section showing proposed bleeder pipe. Original Complaint - Cross Section showing bleeder pipe

of 6 sheet 27.pdf Original Complaint - Cross Section showing bleeder pipe 8092845_Flood Inventory Rpt 1_04.pdf Original Complaint - Drainage complaint inventory sheet SECTION IV: CONCLUSIONS AND RECOMMENDATIONS Recommendation: An earthen berm near elevation 64.9' on the north side of the Applebees/Atlanta Bread Company access road should be constructed to prevent runoff from directly flowing into the Curlew Crossing parking lot. A 6" PVC pipe should be installed from just inside the berm south under the access road. In addition, a 6" PVC bleed-down pipe should be installed from the ditch block at the Home Depot access road south to the manhole at this location. It appears from a site visit on 9-25-2007 that the PVC pipes have been installed. See attached photos. From 1997 Complaint: It appears that at some point between 1976 and 1994 the side drain immediately south of the Home Depot access road was constructed. The 2001 FDOT plans provide no outfall short of overtopping access roads or percolation in the area west of US 19 from Curlew Road approximately 700 ft south. An earthen berm near elevation 64.9 on the north side of the Applebee's/Atlanta Bread Company access road should be constructed to prevent US 19 runoff from directly flowing into the Curlew Crossing parking lot. The estimated low edge of shoulder pavement in this location of US 19 is 65.5. A 6-inch pvc pipe should be installed from just inside the berm south under the access road. This would provide a bleed-down orifice for the swale. In addition, a 6-inch pvc bleed-down pipe should be installed from the ditch block at the home Depot access road south to the manhole at this location. From this point, bleed down flow would enter a 30-inch pipe and head west to Curlew Creek. It should be noted that although this fix will help prevent water from US 19 from running onto adjacent properties, seepage from the steep hill adjacent to the Curlew Crossing Shopping Center will still continue to impact these property owners regardless of the existence of US 19. In addition, any high groundwater problems affecting the parking lot base material will not be alleviated by this fix. It should also be noted that runoff generated from the large parking lot and impervious area associated with Curlew Crossing far exceeds that generated from this portion of US 19. Recommendation Date: Project Ranking: ROADWAY FLOODING MATRIX Ranking of the roadway hazard level based on accident data, ADT, depth and location of water, and site specific factors. Ranking of the operational impacts (i.e. magnitude of vehicle speed reduction, ADT, frequency of flooding, availability of detour route, and cost 0

of 6 to FDOT to handle problem, etc.) (Weight Factor = 7) Ranking of the nuisance factor to the public and FDOT. (Weight Factor = 3) 0 Ranking of the length of time before scheduled roadway improvements that will also provide remedy, are to be let to contract. Ranking of the costs to cure the problem, if any. Total Score 0 PRIVATE PROPERTY FLOODING MATRIX Ranking of the potential financial impacts versus the flooding frequency that impacts the private property. Ranking of the hazard level versus the flooding frequency that impacts the private property. Ranking of the nuisance factor to the private property as well as FDOT. Ranking of the costs to FDOT to cure the problem versus the financial impact to the private property if not cured. Ranking of the length of time before scheduled roadway improvements that will also provide remedy, are to be let to contract. Total Score 0