The intent of this article is to outline the requirements for the construction of streets within the Town of Middletown. Unless specifically stated herewith, all materials, equipment, design, details and construction methods associated with the construction of streets within the Town of Middletown shall conform to the latest editions of the manuals, specifications and guidelines of the Delaware Department of Transportation.
A. 
Description. The paving of all streets and entrances to driveways and parking area within the Town of Middletown right-of-way shall be constructed as shown on the final approved plan and in accordance with the following standards.
B. 
Minimum slope requirements. The minimum lateral cross slope for all streets shall be 2.0% as measured from the center line of the street to the edge of pavement. The minimum longitudinal slope, as measured along the centerline of the street, shall be 0.50%.
C. 
Soils investigation requirements.
(1) 
In the event the Town of Middletown determines a soil investigation is necessary, a geotechnical engineer registered in the State of Delaware with experience in pavement engineering shall perform the soils investigation. The developer shall be responsible for the cost of the soil investigation. Boring locations, sampling procedures and method of testing shall be approved by the Town of Middletown and in accordance with the latest procedures found in the Delaware Department of Transportation Materials Manual. The developer shall be responsible for stabilizing all weak and wet subgrade prior to construction of the crushed aggregate base course.
(2) 
If weak or wet areas are suspected or encountered during construction, the Town of Middletown reserves the right to require a soils investigation as stated above, or require additional borings and testing if a report was prepared prior to construction. If the soils are found to be extremely weak with a soil resilient modulus less than 3400 psi, the Town of Middletown reserves the right to require an in-depth soils strength analysis and a specific pavement design that will satisfactorily address the specific situation. The developer shall be responsible for all costs associated with the investigation and design.
(3) 
In the event unsuitable soils are encountered during the installation of a utility within the street right-of-way, the Town of Middletown reserves the right to require the placement of backfill material meeting the most recent specifications of the Delaware Department of Transportation. All costs associated with the placement of backfill shall be the responsibility of the developer.
(4) 
In the event that streets are to be constructed in areas that require the removal of unsuitable material, the Town of Middletown reserves the right to request an investigation to determine the extent of the unsuitable material to be removed. The developer shall be responsible for all costs associated with the investigation.
D. 
Pavement construction material and thickness requirements.
(1) 
Pavements shall be designed based on the assumption of poor soil conditions. All proposed streets shall be constructed, at a minimum, to the required type of materials and thickness of layers as specified in the tables below. If any street is expected to serve additional traffic in the future, such as an extension to a future development or tie-in to another development, the anticipated future increase in traffic shall be incorporated into the design.
(2) 
For developments larger than 500 residential units or 2,000,000 square feet of industrial/commercial building space, the developer shall contact the Town of Middletown for pavement design requirements necessary to meet the specific situation.
E. 
Minimum material type and layer thickness requirements.
Residential Street: Up to 500 Units
Pavement layer
Thickness
Wearing (surface) course
2 inches
Binder course
3 inches
Bit. conc. base conc.
4 inches
Aggregate subbase
9 inches
Structural number
4.54
Geotextile separator
Optional (To be determined by Town of Middletown)
Commercial Street: Up to 2,000,000 Square Feet
Pavement layer
Thickness
Wearing (surface) course
2 inches
Binder course
3 1/4 inches
Bit. conc. base conc.
5 inches
Aggregate subbase
12 inches
Structural number
5.38
Geotextile separator
Optional (To be determined by Town of Middletown)
F. 
Subgrade verification requirements.
(1) 
After the developer has prepared the soil subgrade in accordance with the Town of Middletown Street Construction Specifications, a proof roll of the prepared subgrade shall be required prior to placing the geotextile separator (if required) and asphalt base course. Density testing to verify compaction shall be performed in the field as directed by the Town of Middletown. All costs associated with compaction testing shall be paid by the developer.
(2) 
A proof roll of the prepared subgrade and crushed aggregate base course shall be performed prior to the placing of the geotextile separator (if applicable) and asphalt base course. The proof rolling shall consist of a triaxial dump truck fully loaded to the maximum allowed weight (a certified delivery slip from the quarry shall be required to verify the weight). The truck shall be required to run the entire street subgrade including curb lines, over all trenches and anywhere directed by the Town of Middletown inspector. Areas displaying movement, pumping, pronounced elasticity or deformation under the loaded triaxial dump truck will be considered unstable and will be noted and or marked. The areas marked and or noted showing unstable subgrade shall be corrected and reverified for the required stability prior to placing the geotextile separator (if applicable) and asphalt base course.
(3) 
A Town of Middletown inspector shall perform an inspection to verify the grade elevations of the subgrade and crushed aggregate base course prior to placement of the geotextile separator (if applicable) and asphalt base course. The contractor shall ensure that sufficient grade stakes are in place to allow for the appropriate measurements. Any areas that are not at the proposed design grade shall be corrected and reinspected prior to placing the geotextile separator (if applicable) and asphalt base course.
G. 
Joint sealing. Joint sealing of longitudinal joints and pipe trenches are required.
A. 
Description.
(1) 
All signs, including regulatory, warning, directional and street signs shall be installed in accordance with the final approved plans and in conformity with the requirements of these Specifications and the Delaware Department of Transportation. In the event field conditions create difficulty adhering to the approved plans or specifications, the developer shall install the signs in accordance with the direction provided by the Town of Middletown.
(2) 
All signs installed within the Town of Middletown shall meet the reflective requirements of the Delaware Department of Transportation.
B. 
Sign posts.
(1) 
Street signs shall be installed on a telescoping sign post which shall be supplied and installed as a complete unit inclusive of one specified length of two-inch square sign post, one thirty-six-inch by 2 1/4-inch base post, one eighteen-inch by 2-1/2-inch base post, one corner bolt and one nut. Sign post materials shall be in accordance with Section 1072 of the current edition of the DelDOT Standard Specifications for Road and Bridge Construction.
(2) 
The minimum distance from the final grade to the bottom of the sign shall be seven feet.
(3) 
Street signs within residential communities are to be installed prior to the placement of the binder course of hot mix asphalt.
C. 
Street name signs (blades).
(1) 
Street name signs shall be ordered by the developer.
(2) 
Street name signs shall be as follows:
(a) 
Size: 24 inches wide by six feet tall.
(b) 
Background: white reflective, high-intensity prismatic (HIP) meeting ASTM D4956 Type IV.
(c) 
Blade material: flat 0.080 inch double-sided engineering grade reflective aluminum with 3/4-inch radius corners.
(d) 
Text font: Highway Gothic Narrow.
(e) 
Text color: black vinyl.
(f) 
Border color: black vinyl.
(g) 
Warranty: ten-year.
(3) 
Colors shall meet official MUTCD standards.
D. 
Stop signs. Stop signs shall be an octagon, 36 inches by 36 inches, with a white message and border on a red background.
Description.
A. 
The Town of Middletown Electric Department is responsible for coordinating the streetlight design, purchasing all materials and installation. The Town of Middletown is responsible for selecting the type of lights installed.
B. 
It shall be the responsibility of the developer to pay the Town of Middletown for all costs associated with the installation of streetlights including design, material and labor.
Description.
A. 
All streets dedicated to the Town of Middletown shall be constructed with integral PCC curb and gutter, Type 3 in accordance with the standards and specifications of the Delaware Department of Transportation. All other types of curb and gutter shall only be permitted with written approval by the Town of Middletown.
B. 
Unless authorized by the Town of Middletown, existing granite curb may not be replaced with any other type of curbing materials, except that granite curbs may be replaced by concrete curbs where necessary to facilitate the construction of a ramp for ADA access to and from the adjoining street. Granite curbing, when authorized to be removed by the Town, shall be delivered to and stored on Town property at a location or locations designated by the Department of Public Works.
Description.
A. 
All drainage pipe installed within the dedicated Town of Middletown right-of-way shall be reinforced concrete pipe.
B. 
Videotaped inspection of the completed storm drainage system shall conform to the standards and specifications of the Delaware Department of Transportation.
C. 
Upon completion of all drainage, and prior to acceptance, as-built drawings shall be submitted to the Town of Middletown for review and approval. One electronic copy in pdf format shall be submitted bearing the signature and seal of a Delaware-registered surveyor or engineer with the same scale as the original approved drawings.
D. 
Storm sewer pipes at structures, which are less than 1/2 of a full pipe length, are to be set on a concrete cradle from the joint to the face of the structure.
E. 
Inlet and outlet pipes shall extend through, and be flush with, the inside of the structure wall. When cutting off the end of a reinforced concrete pipe, finish with mortar so that no reinforcement steel remains exposed. Fill any space between the pipe and the walls of the drainage structure with solid brick and nonshrink grout conforming to the requirements of ASTM C1107 Grade C, with a minimum strength of 5,000 psi. Ensure that the pipe opening in the drainage structure is no more than four inches larger than the pipe diameter measured from the outside pipe wall. Nonshrink grout shall be given a minimum of four hours to cure prior to backfill being placed at the pipe connection. A concrete collar at the pipe connection may be installed in the event that the backfill must be placed prior to achieving the minimum four-hour cure time.
Description.
A. 
Catch basin submittals shall be submitted to the Town of Middletown for review and approval for all structures that are not in conformance with the standard specifications of the Delaware Department of Transportation.
B. 
A storm drain marker bearing the words "Don't Pollute Flows to Waterways" as manufactured by Das Manufacturing, or approved equal, shall be installed on all catch basins prior to final acceptance. The developer shall follow all manufacturers specifications for the installation.
Description. Speed bumps shall be prohibited within all right-of-way dedicated to the Town of Middletown.
Description. All roadway markings, including but not limited to stop bars, center line and lane line striping, crosswalk striping and symbols shall be thermoplastic. Paint and epoxy resin will not be permitted.