Talbot County, MD Stormwater Management Plans

Concept plan. The applicant shall submit a concept plan that provides sufficient information for initial assessment of the proposed project to determine whether stormwater management can be provided according to § 164-4.2 of this chapter and the Design Manual. Plans submitted for concept approval shall include, without limitation:

(1)

A map at a scale specified by the County Engineer showing site location, existing natural features, water and other sensitive resources, topography, and natural drainage patterns;

(2)

The anticipated location of all proposed impervious areas, buildings, roadways, parking, sidewalks, utilities, and other site improvements;

(3)

The location of the proposed limit of disturbance, erodible soils, steep slopes, and areas to be protected during construction;

(4)

Preliminary estimates of stormwater management requirements, the selection and location of ESD practices to be used, and the location of all points of discharge from the site;

(5)

A narrative that supports the concept design and describes how ESD will be implemented to the MEP; and

(6)

Any other information required by the County Engineer.

Site development plan. Following concept plan approval by the County Engineer, the applicant shall submit a site development plan that addresses all previous comments and that contains sufficient detail to allow appropriate review, including, without limitation:

(1)

All information provided during the concept plan review;

(2)

Final site layout, exact impervious area locations and acreages, proposed topography, delineated drainage areas at all points of discharge from the site, and stormwater volume computations for ESD practices and quantity control structures;

(3)

A proposed erosion and sediment control plan that contains the construction sequence, any phasing necessary to limit earth disturbances and impacts to natural resources and an overlay plan showing the types and locations of ESD and erosion and sediment control practices to be used;

(4)

A narrative that supports the site development design, describes how ESD will be used to meet the minimum control requirements, and justifies any proposed structural stormwater management measure; and

(5)

Any other information required by the County Engineer.

Final plan. Following site development approval by the County Engineer, the applicant shall submit final erosion and sediment control and stormwater management plans that address all comments received during the previous review. Plans submitted for final approval shall include sufficient detail to allow all approvals and permits to be issued as follows:

(1)

Final erosion and sediment control plans shall be submitted according to COMAR 26.17.01.05; and

(2)

Final stormwater management plans shall be submitted for approval in the form of construction drawings and be accompanied by a report that includes sufficient information to evaluate the effectiveness of the proposed runoff control design.

Reports submitted for final stormwater management plan approval shall include, without limitation:

(1)

Geotechnical investigations, including soil maps, borings, site specific recommendations, and any additional information necessary for the final stormwater management design;

(2)

Drainage area maps depicting predevelopment and post-development runoff flow path segmentation and land use;

(3)

Hydrologic computations of the applicable ESD and unified sizing criteria according to the Design Manual for all points of discharge from the site;

(4)

Hydraulic and structural computations for all ESD practices and structural stormwater management measures to be used;

(5)

A narrative that supports the final stormwater management design; and

(6)

Any other information required by the County Engineer.

Construction drawings submitted for final stormwater management plan approval shall include, but are not limited to:

(1)

A vicinity map;

(2)

Existing and proposed topography and proposed drainage areas, including areas necessary to determine downstream analysis for proposed stormwater management facilities;

(3)

Any proposed improvements, including location of buildings or other structures, impervious surfaces, storm drainage facilities, and all grading;

(4)

The location of existing and proposed structures and utilities;

(5)

Any easements and rights-of-way;

(6)

The delineation, if applicable, of the 100-year floodplain and any on-site wetlands;

(7)

Structural and construction details, including representative cross sections for all components of the proposed drainage system or systems, and stormwater management facilities;

(8)

All necessary construction specifications;

(9)

A sequence of construction;

(10)

Data for total site area, disturbed area, new impervious area, and total impervious area;

(11)

A table showing the ESD and unified sizing criteria volumes required in the Design Manual;

(12)

A table of materials to be used for stormwater management facility planting;

(13)

All soil boring logs and locations;

(14)

An inspection and maintenance schedule;

(15)

Certification by the applicant that all stormwater management construction will be done according to this plan;

(16)

An as-built certification signature block to be executed after project completion; and

(17)

Any other information required by the County Engineer.

The applicant shall obtain any easements or other property rights or interests from affected adjacent property owners concerning modification of water flow and drainage, in accordance with the Design Manual, from the site. Approval of a stormwater management plan does not create any new right to collect or direct runoff onto adjacent or downstream property. The County's adoption and implementation of stormwater management controls through this chapter is required by Maryland state law and is a governmental function. The County shall have no liability in tort to any applicant, any third person, firm, corporation, or other entity in connection with the review, approval, or disapproval of any plan, stormwater management system, stormwater management measure, technique, or structure, or any amendments, modifications, or changes thereto, or for any other decision or action in connection with or resulting from application of this chapter.