Prepared for City of Palm Coast, Florida April 28, 2015 Stormwater Detention Facilities for...

Prepared for City of Palm Coast,

Florida

April 28, 2015

Stormwater Detention Facilitiesfor City-Wide Stormwater Management Master Plan

Singhofen & Associates, Inc. April 28, 2015

To anticipate the need for additional services and infrastructure to provide opportunities for mixed use development with goods, services, and employment.

Goal 1 Expansion


Section Numbers

Sections Already Modeled

Sections Being Modeled

City of Palm Coast Modeling Status

1 2 3 4 5 6 7 8 9 10 11

12 13 14 15 16 17 18 19 20 21 22

23 24 25 26 27 28 29 30 31 32 33

34 35 37 39 57 58 59 60 63 64 65

81


City of Palm Coast Modeling Status


Section 35 High water levels due to

Constrictions at London Drive, US 1 (to Hulett Branch) I-95 (to Mulberry Creek)

Home flooding predicted in < 1 % of homes (all in Bird of Paradise area)

Number of homes below City standard for 100-year event = 11 %

Secondary drainage deficiencies - 10 year event = 2

Modeling Results


Section 35 (“B” Section) – Level of Service

Deficient secondary roads = 2

Secondary drainage deficiencies

“B” Section (Section 35) Improvements - 2014Ditch and Pipe Modifications

(Bunker Hill Drive to Burnaby Lane)

2014 Program Results


Section 37 High water levels due to

Constrictions at London Drive, US 1 (to Hulett Branch) I-95 (to Mulberry Creek)

No home flooding predicted Number of homes below City standard for 100-year

event = 9 % Secondary drainage deficiencies - 10 year event = 6

Modeling Results


Section 37 (“L” Section) – Level of Service

Deficient secondary roads = 6

Secondary drainage deficiencies

“L” Section (Section 37) Improvements - 2015Ditch and Pipe Modifications

(Lindsay Drive to Lancelot Drive)

2015 Program Results


Sections 35 & 37 – Recommended Capital Improvements

Possible Detention Storage Locations ~100-acft required in total


System Performance Evaluation For Homes:

Home flooding evaluated relative to base flood (i.e., 100-year storm)City has required 1 foot of freeboard above 100-year elevation

Level of Service Evaluations

Freeboard


Model Results

Level of Service Improvement:Homes below 100-year City standard reduced by 63 %Homes remaining below 100-year City standard = 4 %All secondary deficiencies eliminated


Recommended Improvement Plans based on Modeling Results for Section 35 and Section 37

Section 35 Improvements:Ditch and Pipe Improvements

Design Completed Construction Completed

Section 37 Improvements:Ditch and Pipe Improvements

Design CompletedConstruction is 50% Complete

Floodplain Storage CreationProposed areas include three general locations along the Belleaire canal waterway in Section 37.Design, Permitting, and Construction Services proposed.


Next Step for Implementation Section 37 Floodplain Storage Permitting and Design Services

Scope of Services is in two Phases:

Phase 1:Initial survey, environmental, and geotechnical services Provide preliminary layout of proposed design (30% Plans)

Phase 2:Finalizing proposed design Prepare construction plans and permitting

Staff recommends approving a work order forSection 37 Floodplain Storage Permitting and Design


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Prepared for City of Palm Coast, Florida April 28, 2015 Stormwater Detention Facilities for...

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