[Ord. No. 1620 §1, 9-25-2006]
A. 
The developer whose intent is the creation of new streets in the development of any residential or non-residential subdivision shall adhere to the construction standards set forth in this Chapter.
B. 
The developer shall be responsible for addressing each of the areas in the project's construction specification documents.
1. 
The design plans and construction specifications shall be approved by the City's consulting engineer prior to any work taking place.
2. 
The developer will coordinate all necessary inspections prior to the commencement of any work.
3. 
All expenses that relate to required tests of concrete, gradation, compaction or special inspections shall be born solely by the developer. Any costs associated with the relocation or modification of existing utility infrastructure to support the developer's project shall be the sole responsibility of the developer.
C. 
Development of all street infrastructure will be guided by strict compliance of the approved design plans and specifications. Until reviewed and approved by the City's consulting engineer, no changes or modifications shall be authorized and no deviations permitted from the originally approved design plans and project specifications. Change orders and design modifications will be submitted by the developer's project engineer only and no other person.
[Ord. No. 1620 §1, 9-25-2006]
A. 
Clearing And Grubbing. Clearing and grubbing shall consist of removing, cutting and disposing of all brush, vegetation, logs, stumps, rubbish and other materials occurring within the limits of the improvement which will interfere with the excavation or which are unsuitable to be left in the roadway foundation. This shall also include the cutting, removing and disposing of all trees and stumps except those that will not interfere with the construction and not shown on the plans. The developer shall exercise due care in his construction operations to prevent marring or scarring of trees that are to remain.
B. 
Stumps and roots in excavated or fill areas shall be removed to a depth of eighteen (18) inches below subgrade.
[Ord. No. 1620 §1, 9-25-2006]
A. 
The developer shall perform excavation of every type of material encountered within the limits of the project to the lines, grades and elevations indicated and as specified in this Section. Satisfactory excavated materials shall be transported to and placed in fill or embankment areas within the limits of the work. Unsatisfactory materials encountered within the limits of the work shall be excavated below grade and replaced with satisfactory materials as directed. Such excavated material and the satisfactory material ordered as replacement shall be included in excavation. Surplus satisfactory excavated material not required for fill or embankment or unsatisfactory excavated material shall be uniformly spread within the work area. During construction, excavation and filling shall be performed in a manner and sequence that will provide proper drainage at all times. Material required for fill or embankment in excess of that produced by excavation shall be obtained from the borrow areas off of construction limits at the developer's responsibility. Excavations below indicated depths will not be permitted except to remove unsatisfactory material.
B. 
Preparation Of Ground Surface For Embankments. Ground surface on which fill is to placed shall be stripped of live, dead or decayed vegetation, rubbish, debris and other unsatisfactory material. The prepared ground surface shall be scarified and moistened or aerated as required just prior to placement of embankment materials to assure adequate bond between embankment material and the prepared ground surface.
C. 
Earth Embankments. Earth embankments shall be constructed from satisfactory materials free of organic or frozen material and rocks with maximum dimensions greater than three (3) inches. The material shall be placed in successive horizontal layers of loose material not more than eight (8) inches in depth. Each layer shall be spread uniformly on a prepared surface, i.e., a soil surface that has been moistened or aerated as necessary and scarified or otherwise broken up in such a manner that the fill will bond with the surface on which it is placed. Areas under proposed structures and areas to be surfaced shall be compacted to at least ninety-five percent (95%) maximum density for cohesive materials. All other areas be compacted to eighty-five percent (85%) and ninety percent (90%) respectively. Method of tests shall be in accordance with ASTM Standard D 698.
D. 
Benched. Everywhere there is new fill adjacent to existing soil, the new fill shall be "benched". Benching involves placing the new fill in six (6) inch compacted lifts where the existing soil or fill has been "benched" by the removal of a variable amount of soil. The bench shall be a minimum of twelve (12) inches vertical and will provide a bench of soil to place the new lift onto. The resulting fill will then be a cohesive unit that inhibits slippage.
E. 
Rock Embankments. Rock embankments shall be placed in successive horizontal layers of loose material not more than twenty-four (24) inches in depth. Pieces of rock larger than twenty-four (24) inches in greatest dimension shall not be used. Each layer of material shall be spread uniformly and compacted until the interstices are filled with well compacted materials and the entire layer is a densely compacted mass. Each successive layer of material shall adequately bond to the material on which it is placed.
[Ord. No. 1620 §1, 9-25-2006]
A. 
Subgrades shall be shaped to line, grade and cross section and compacted as specified in this Section. This operation shall include plowing, disking and any moistening or aerating required to obtain proper compaction. Soft or otherwise unsatisfactory material shall be removed and replaced with satisfactory excavated material or other approved material as directed.
B. 
Finishing. The surface of all excavations, embankments and subgrades shall be finished to a reasonably smooth and compact surface substantially in accordance with the lines, grades and cross sections or elevations shown on the drawings. This process shall be repeated until all irregularities are removed. Extreme care shall be taken in shaping the subgrade, so that at no place will the completed pavement vary from the specified thickness. All soft and yielding spots shall be removed to a depth of not-to-exceed two (2) feet and all unsuitable material shall be removed and the resulting spaces shall be refilled with approved material. All large rocks or boulders encountered shall be removed or broken off to a depth of not less than six (6) inches below the finished surface of the subgrade and the space shall be refilled. The surface of areas to be turfed shall be finished to a smoothness suitable for the application of turf materials.
C. 
Restoring Subgrade To Acceptable Condition. If the subgrade is disturbed in any manner after the work described in the preceding paragraph has been completed, it shall be brought to an acceptable condition by reshaping and rolling or with macadam.
D. 
Determination Of Density. Testing shall be the responsibility of the developer. Testing shall be performed by an approved commercial testing laboratory. Tests shall be performed in sufficient number to ensure to the satisfaction of the City that the specified density is being obtained.
1. 
Moisture density relationship shall be determined in accordance with ASTM D698. Copies of all density test results shall be submitted to the City of Hermann Public Works Department upon the completion of each test.
E. 
Protection. Settlement or washing that occurs in graded areas prior to acceptance of the work shall be repaired and grades re-established to the required elevations and slopes.
F. 
Disposal Of Excess Excavated Materials. All excess excavated materials shall be disposed of away from the site of the work at the expense and responsibility of the developer. Broken concrete and other debris resulting from pavement or sidewalk removal, excavated rock in excess of the amount permitted to be and actually installed in trench back fill, junk and debris encountered in excavation work and other similar waste materials shall be disposed of away from the site of the work.
G. 
Settlement. The developer shall be responsible for all settlement of backfill, fills and embankments that may occur within one (1) year after final completion of the street development under which the work was performed. The developer shall make or cause to be made all repairs or replacements made necessary by settlement within thirty (30) days after notice from the City.
[Ord. No. 1620 §1, 9-25-2006]
A. 
Type 1 Aggregate (Rolled Stone). Aggregate for Type 1 base shall be essentially limestone. The crushed stone shall not contain deleterious material such as shale or disintegrated stone in excess of fifteen percent (15%). Any silt, any clay and any deleterious material shall be uniformly distributed throughout the mass. The aggregates shall conform to the following gradation requirement:
1. 
Passing one (1) inch sieve one hundred percent (100%).
2. 
Passing one-half (½) inch sieve sixty to ninety percent (60 — 90%).
3. 
Passing No. 4 sieve forty to sixty percent (40 — 60%).
4. 
Passing No. 40 sieve fifteen to thirty-five percent (15 — 35%).
B. 
Type 2 Aggregate (Compacted Granular Base). Aggregate for Type 2 base shall consist of crushed stone, limestone screening, sand and gravel, sand, chat or sandstone or combinations of these materials, with or without soil binder as may be required. The material shall conform to the following gradation requirements and in addition shall be so graded that it will readily compact to the specified density and withstand construction traffic without distortion and displacement.
1. 
Passing one and one-half (1½) inch sieve one hundred percent (100%).
2. 
Passing No. 40 sieve fifteen to fifty percent (15 — 50%).
3. 
Passing No. 200 sieve, not more than thirty-five percent (35%).
[Ord. No. 1620 §1, 9-25-2006]
A. 
Aggregate base shall consist of a uniform mixture of properly graded materials placed on a prepared subgrade as shown on the plans. The type of aggregate used shall be as specified in the specifications. This work consists of furnishing and placing aggregate base material in one (1) or more courses to a depth of six (6) inches on a graded and compacted subgrade surface in conformance with the lines, grades and thickness and cross sections shown on the drawings and compacting the material in accordance with this Section.
B. 
Placement. Aggregate base material shall be placed and spread uniformly on the prepared subgrade. All work on any section of the subgrade on which the base is to be constructed shall be completed prior to the placing of any base material on that section. Material shall be placed so that the thickness of the course after compaction will not exceed six (6) inches. Should the total required base course thickness exceed six (6) inches, the material shall be placed in two (2) or more equal lifts. Each lift shall be compacted before the next lift is placed.
C. 
Spreading, Shaping And Compacting. In no case will the developer be permitted to place the mixture or manipulate it on muddy or frozen subgrade. Also, any mixture containing frost or frozen particles shall not be placed on the subgrade or compacted. After the subgrade has been properly prepared, the mixture shall be uniformly spread by blades or other approved equipment, in successive layers of courses to such depth that, when compacted, the base will have the minimum thickness shown on the typical cross section.
D. 
Compaction. Shaping and compacting shall be performed until a true, even and uniform surface of proper grade, cross section and density is obtained.
1. 
Maximum density. Aggregate shall be compacted to not less than ninety-five percent (95%) of standard maximum density.
E. 
Testing. All testing shall be performed by the developer as a part of his quality control program. The developer shall bear all costs associated with the testing. Copies of all test results shall be submitted to the City of Hermann Public Works Department upon the completion of each test.
1. 
The standard compaction test will be made in accordance with ASTM D 698-70, Method C.
2. 
Field density will be determined in accordance with ASTM D 1556-64, Sand Cone Method.
3. 
If nuclear density test methods are used, moisture content will be determined in accordance with AASHTO T239, except that a moisture correction factor will be determined for each aggregate in accordance with MHTD Test Method T35.
4. 
Aggregate gradation tests will be performed in accordance with ASTM C117, C136 and D422. Services shall conform to ASTM Ell. Tests shall be performed on each five hundred (500) cubic yards of material delivered, but not less than one (1) test shall be made each day that material is delivered.
F. 
The surface of the aggregate base shall be well drained at all times. If at any time the compacted aggregate base or subgrade becomes unstable, it shall be the developer's responsibility to restore, at his expense, the earth subgrade and the aggregate base to the required grade, cross section and density.
G. 
The base shall be considered complete when it has the required density with a uniform surface of the proper grade and final template section. Lateral ditches shall be constructed through shoulders, where possible, to insure adequate surface drainage.
[Ord. No. 1620 §1, 9-25-2006]
A. 
This work shall consist of treating an existing surface with bituminous material in accordance with the project specifications and in conformity with the lines shown on the drawings or established by the City.
B. 
The prime coat shall be cutback asphalt Type RC Grade 30 and shall meet the requirements of ASTM 2028.
C. 
Weather Limitations. Bituminous material shall not be applied when either the air temperature or the temperature of the surface to be primed is below sixty degrees Fahrenheit (60°F) or when weather conditions prevent the proper construction of the prime coat.
[Ord. No. 1620 §1, 9-25-2006]
A. 
A hot-mix bituminous pavement shall be placed over a bituminous base or over a aggregate base course in accordance with the approved project specifications. Type C asphalt concrete shall be placed to a thickness of no less than the minimum depth required for the classification of street to be constructed and in accordance with the design plans and specifications submitted to the City for approval.
B. 
The finished courses shall have the thickness shown on the plans and shall be free from waves or irregularities and shall not vary from a ten (10) foot straight-edge, applied parallel to the centerline, by more than one-half (½) inch on the first (1st) or intermediate courses and not more than one-eighth (€) inch on the surface course.
[Ord. No. 1620 §1, 9-25-2006]
A. 
Curb And Gutter Concrete. Concrete shall be thoroughly consolidated by tamping and spading or with approved mechanical vibrators. Placement of curbs and gutters by mechanical means is authorized.
B. 
Concrete curb and gutter shall consist of Portland cement concrete, placed with or without reinforcement on a prepared subgrade. The type and dimensions shall be as shown on the construction plans. The construction of curbs using asphaltic cement shall be strictly prohibited.
C. 
Curb and gutter shall not be less than six (6) inches thick and shall not be less than a minimum of twenty-four (24) inches wide, including the six (6) inch vertical curb. Contraction joints shall be installed every ten (10) feet.
D. 
Concrete used in the construction of curb and gutter shall be Class "A" concrete, unless otherwise specified; and all materials, proportioning, air-entraining, mixing and transporting for Portland cement concrete shall be in accordance with Portland cement concrete.
E. 
Slump tests will be made in accordance with ASTM Specifications C 143. Concrete for concrete curbs and gutters shall have a slump of two (2) to four (4) inches.
F. 
The subgrade shall be graded, compacted and rolled to insure maximum density to the exact cross section and elevations shown on the plans. The subgrade shall be moistened in advance of depositing concrete, but shall not be muddy or excessively wet.
G. 
The forms for this work shall be metal or wood of fill depth of the concrete, straight, free from warp and of sufficient rigidity to prevent distortion due to the pressure of the concrete and other loads incidental to the construction operations. The forms shall be substantial and unyielding and shall be so designed that the finished concrete will conform to the proper dimensions and contours. Forms shall be set and maintained true to the line designated until the concrete is sufficiently hardened. Forms shall be thoroughly cleaned, greased or soaped before concrete is placed. Forms shall be joined neatly and tightly for a distance of at least one hundred (100) feet in advance of the point of placing concrete.
H. 
Concrete curb and gutter shall be constructed in sections having a uniform length of ten (10) feet maximum. The length of a single section may be reduced to a minimum of four (4) feet where necessary for closure. Expansion joints shall be provided at intervals of ninety (90) feet. All joints in concrete curb and gutter shall receive joint filler in accordance with project specifications. The face and top of the curb and gutter shall be floated smooth and the edges shall be rounded as shown in typical section.
I. 
After the concrete has set sufficiently, the spaces back of curbs shall be backfilled to the required elevation with suitable material that shall be compacted in layers of not more than six (6) inches until firm and solid.
[Ord. No. 1620 §1, 9-25-2006]
A. 
Sidewalk And Entrance Concrete. Concrete sidewalks shall be constructed to the line, grade and dimensions shown on the plans and specifications. Unless otherwise specifically designated, concrete sidewalks shall be at least five (5) feet wide and have a cross slope of no more than two percent (2%) or one-quarter (¼) inch to the foot. Sidewalks shall be not less than four (4) inches in thickness and shall be placed on well-compacted subgrade. Driveways or other points designated on the plans, the depth shall be increased to six (6) inches.
B. 
Handicap accessible ramps shall be not less than thirty-six (36) inches wide and shall not have a slope greater than one (1) inch rise per twelve (12) inches length (1:12).
C. 
In instances where surrounding buildings or other restrictions make it impossible to conform with the aforementioned slope requirements, then the handicap accessible ramp shall contain a slope with as shallow a rise as possible under the circumstances not to exceed ten percent (10%). All handicap accessible ramps shall be constructed with a gradual rounding at the bottom of the slope.
D. 
Concrete sidewalks shall be constructed on a prepared smooth subgrade of uniform density. Large boulders and ledge rock found in the subgrade shall be removed to a minimum depth of six (6) inches below the finished subgrade elevation and the space shall be backfilled with suitable material that shall be thoroughly compacted.
E. 
Dummy joints, spaced approximately at five (5) feet intervals, shall be provided for the full width (and length for wider sidewalks) to a depth of one (1) to two (2) inches.
F. 
Pre-molded expansion joint material, one-half (½) inch thick, shall be installed in the sidewalk for its full depth wherever it meets another sidewalk, driveway, building, curb, lighting standard, fireplug or other rigid object. Expansion joints shall be placed on all four (4) sides of the square formed by the intersection of two (2) sidewalks. When the sidewalk fills the space between the curb and a building or wall, an expansion joint shall be placed between the sidewalk and the curb and between the sidewalk and the building or wall.
G. 
After the concrete has been brought true to line and grade, it shall be finished to a medium rough finish by use of a stiff broom or other approved method to produce an even, gritty texture. All edges shall be rounded with an edging tool to one-fourth (¼) inch radius.
H. 
Concrete for concrete sidewalks shall have a slump of two (2) to four (4) inches.
[Ord. No. 1620 §1, 9-25-2006]
A. 
Where called for on the plans, non-reinforced concrete driveway pavement shall be constructed to the line, grade and dimensions shown on plans.
B. 
The minimum driveway width for residential applications shall not be less than nine (9) feet in width. Each residential lot shall be limited to the construction of one (1) driveway entrance per property.
C. 
The minimum driveway width for non-residential one-way enter/exit shall not be less than twelve (12) feet in width and shall not be less than twenty-four (24) feet in width for non-residential two-way enter/exit.
D. 
The maximum slope of any driveway shall not exceed twenty percent (20%).