BDi

ENGINEERING

BLACKBURN CREEK CDD

STORMWATER SYSTEM INSPECTION PHASE 2

Prepared for: Blackburn Creek CDD

Prepared by: Brletic Dvorak Inc.
436 4th Ave. S., Unit 4 St. Petersburg, FL 33701

536 4th Ave. S, Unit 4 St. Petersburg, Fl 33701

D. (813) 361-1466

www.bdiengineers.com

February 2026

Contents
SUMMARY
EXISITING SITE CONDITIONS
RECOMMENDATIONS

Appendices
APPENDIX A – PICTURE DOCUMENT FOR MAINTENANCE WORK

536 4th Ave. S, Unit 4 St. Petersburg, Fl 33701

D. (813) 361-1466

www.bdiengineers.com

 - SUMMARY:
The Blackburn Creek CDD requested that BDI inspect the stormwater conveyance system in Phase 2 in the Grand Palms Community in preparation for stormwater conveyance system maintenance work for 2026. This includes inlets, pipes, outlets, control structures and swales to determine if the system is operating at full capacity, identify problems problems or issues (if any), and provide recommendations as needed to restore the functionality of the drainage system.

 – EXISTING SITE CONDITIONS:
In January 2026 BDI completed a visual inspections of the Phase 2 drainage system as well as conducted a review of SWFWMD ERP permits and permitted plan sets. While our site inspection did not include a full inspections of the entire length of the storm sewer pipes, we were able to inspect inlets, manholes and end sections to determine if there was any accumulation of sand, silt or debris or anything else that may cause blockage within the system.

The findings from the inspection are presented below:
Stormwater curb inlets and grated ditch bottom inlets were found to be in good condition. Man hole covers were pulled to complete a visual inspection inside each structure. Most were observed with little to no signs of sediment or debris. There were a few that have impacts from observed debris, sediment or vegetation. Those structures are identified via attached pictures.
Stormwater pipe end section were found to be in good condition. The MES/FES structures operate in a free flow condition and no significant signs of sediment, debris or vegetation were observed.
Control structures were found to be in good condition.
Treatment and conveyance swales and channels were found to be in good condition.
In general, the stormwater conveyance system within Phase 2 of Blackburn Creek CDD is in good condtion. We have identified some minor maintenance activities in the following section which will enhance the ability of the system to convey stormwater through community more efficiently.

 – RECOMMENDATIONS:
Based on our findings, BDI recommends the following maintenance activities be performed with in the next year:
Recommend continued ongoing maintenance of vegetation and removal of debris and sediment from control structures, grated swale inlet(s) or ditch bottom inlets, drainage swales and channels.
Reecommend ongoing annual inspections of the drainage conveyance system in order to identify and mitigate issues at the earliest possible stage.
We also recommend that the CDD have regular and ongoing communication with the residents, contractors and vendors regarding the importance of preventing vegetation, debris and sediment from entering into the stormwater system. Implementing the following activities will help maintain the drainage system’s ability to convey, attenuate and treat the stormwater within the community.
Eliminate power leaf blowing vegetation and debris into the street and drainage inlets.

Eliminate the application of excess mulch that is prone to movement during storm events.
Incorporate appropriate erosion control measures such as silt fence and inlet protection at active construction sites.

APPENDIX A
Picture Document for Maintenance Work

Structure

FES 65% full of sediment and debris

Cut back vegetation overgrowth on spillway

Maintain minimum 4ft vegetation clear zone at skimmer board

Remove tree out of swale

**

12781 Palatka 0��4293, USA

@ 27.066301, -82.32537 ±9ft

12713 Palatka Dr, Venice, FL 34293, USA

@ 27.066214, -82.322662 ±88ft

I 536 4th Ave. S, Unit 4 St. Petersburg, Fl 33701

D. (813) 361-1466

Replace sanitary lid with storm lid

Replace sanitary lid with storm lid

536 4th Ave. S, Unit 4 St. Petersburg, Fl 33701

D. (813) 361-1466

www.bdiengineers.com