f~E_~7EC;7 I Ciha CiF AL_L H 1 IaS SUE~k~I ]:77~r~ 7CJ 7;-~ ~; i.~ i.~ CJ 4? l~ C) k~i f~ F? [-~+_! ~ H C 1-~4 I k=~F=={t ~ ~ Cain ti-ii=_. tt-,~ 9t: 1-t cit:<<~ of k~4nvemtaer~ ~.9`-:~t~', ~_~~~ar, mnt:ic~n m~tdE~ try t;ommis=i.Gr~er~ Holt,k~mp, =,ecc~r~~i~d by Gommiysi~~r,e•r L3~1'il~'r y t4-rN Gc~~.!.r~t: unanimously approved by a vote of 4-0-0, t~ r~~,j~ct ~~. i f~,id=. fc~r- tl-,e tr-~~i1Fr-- mu~_intec3 4~r-~~_~sh ct;i~F?Fr-, ~tr~ci n~,v~ t~iclder~~; r' ? S 4_C L! m l ~ c1 ~ ~ t' i^ rl ui t @ t] 1 ~~ '=~ ~ t •=t ~ cl'h ? r'' i-} .1 t f. MEMO TQ Commissioners' Court FRONL• Franklin Johnston, P.1/. DATE: November 6, 1992 RE Recommendation for Awarding of Bid for Trailer Mounted Brush Chipper 1. Vermeer 1250 $19,12 4.0 0 a. The mechanics and personnel who demonstrated the wood chippers feel the design and operational features of this machine are best suited to our needs, b. The feed motor design, a disc with blades 90 degrees apart make fora more efficient chipping system. 2. Bandit 250 $18,324.00+ $220.00 for Torsion Suspension= $18,544.00 a. Has problems with the feed motor system couplers stripping the keyways b. Discs blades are 180 degrees apart instead of specified 90 degrees c. Will need the optional John Deere Engine 3. Vermeer 1220 $15,500.00 a. This is a smaller machine which does not meet specifications. 4. Mobark 290 $16 , 7 8 9.0 0 a. This is the same design as our current chipper which has many mechanical and operational problems that we do not wish to consider. b. Discs blades are 180 degrees apart instead of specified 90 degrees 5. Mobark 20136 $15,095.00 a. Does not meet specifications. S J BID TABULATION FOR ------------ TRAILER MOUNTED BRUSH CHIPPER -------------- -------- 1250 --------- 250 -------------------- 290 ----------------------------- Vemeer ---------- Bandit ----------- Mobark ------------------ yes no yes no ---- yes no ENGINE: , 1. x x x 2. x x x 3. x x x 4. x x x 5. x x x 6. ~ x x x 7. x x x $. x x x INSTRUMENT PANEL: 1. x x ? 2. x x x 3. x x x 4. x x x 5. x x x 6. x x x TRAII.ER 1. Frame: a, x x x b. x x ? 2. Tongue: a. x x x b. x x x c. x x x d. x x x e. x x x 3. Axle and Suspension: a. x x x b. x x x c. 4. Tires and rims: a. x x x b. x x x S V ------------------------- --------- 1250 ------ 250 --- ----- 290 --------------- ' ------------------- Vemeer Bandit Mobark ---------- 5. Lights: --------- x -------- x --- ------ x ----------------- CHIPPER DISC ASSEMBLY: , I. x x x 2. x x x a. x x x b. ~ x x x 3. x x ? 4. x x x 5. x x x 6. x x x 7. x x x 8. x x x CHIPPER BODY CONSTRUCTION: I. x x x 2. x x ? 3. x x x 4. x x x a. x x x b. x x x 5. Discharge chute: a. x x x b. x x x c. x x x HYDRAULIC SYSTEM: I. x x x 2. x x x 3. Pump: x x x a. x x x b. x x x 4. Valve x x x 5. Motors: a. x x x b. x x x c. x x x 6. Safety bar - x x x EQUIPMENT AND ACCESSORIES; I. Auto-feed system - x x x J COMMISSI~~NERS' COURT AGEI~JA REQUEST ~PEA~E FURNISH ONE ORIGINAL AND FIVE COPIES Or= THIS REQUEST AND _ DOCUMENTS TO BE REVIEWED BY THE C01.1~?T Franklin Johnston, P.E. Road & Bridge Office -I.~DE BY: OFFICL-~ i~ir~ETING DATE: November 3, 1992 TIME ~REFERP,ED: :~~~1BJECT: (PLEASE BE SPECIFIC) Road specification update E'~ECUTIVE SESSION REQUESTED: YES t~0 xx '__~ASE STATE REASON Consideration of approval and acceptance of ~:: ~' changes in County Road Specifications. .-, :::TIMATED LENGTH OF PRESENTATION 20 minutes ~~~-:RSONNEL MATTER - NAME OF EMPLOYE: 'J 1ME OF PERSON ADDRESSING THE COURT: Franklin Johnston, P.E. I~~e for submitting this request for Court to assure that the mast^r Is posted in accordance ~i~trh Article b252-17 1s as follows: k Meetings held on second Monday; 12;00 P.M. prevlous Wednesday y Meetings held on Thursdays; 5:00 P.M. prevlous Thrusday ~~~-IS REQUEST RECEIVED BY: Tf ~! S REQUEST RECEIVED ON : n ~,il Agenda Requests w111 be screened by the County Judge's Office tc ~eter,....`.,o I' „_,a~equate information has been prepared for the Court's formal conslderattor and z_'ion -: time of .Court meetings. Your cooperation will be appreciated and contr`~~_~`? '^~~rarCS ~.~~ur request being addressed at the earl (est oppor~;~~ (ty. See A~e~~'z acni~oc r ~ •- - " !!delines. MEMORANDUM TO: Commissioners' Court FRdNL Franklin Johnston, P.E., County Engineer DATE October 28, 1992 RE Road Specification Update 1. The Commissioners` Court approved the County Engineer in Court Order # 20902 to review and up-date Subdivision Road Specifications. 2. The attached are revisions of Section IX, "Road Specifications," and Section X, "Inspection, Approval, and Acceptance," of the Ken County Subdivision Regulations far your consideration. 3. With your approval of these sections, the Kerr County Subdivision Regulations shall be amended to show these new sections. ORDER NO. 20902 APPROVAL OF COUNTY ENGINEER TO REVIEW AND UP-DATE SUBDIVISION ROAD STANDARDS On this the 27th day of April^f992, upon motion made by Commissioner Oehler, seconded by Commissioner Holekamp, the Court UNANIt•IOUSLY APPROVED BY A VOTE OF 4-0-0, to approve that the County Engineer make recommendations for updating and revisions of road standards for Kerr County. Section IX ROAD SPECIFICATIONS 9.01 SUBGRADE PREPARATION 9.Ol.A CLEARING ANG GRUBBING: The entire area of the ROW shall be selectively cleared and grubbed to a depth of not Less than one foot below natural ground in fill areas and one foot below subgrade elevation in excavated areas. Brush and other debris shall be removed from the ROW and disposed of as elected by the developer. 9.01.8 DENSITY: Subgrades shall be constructed and finished with a minimum density of 90% of standard proctor for in place materials or as specified in the payment report prepared by a soils Iab. 9.Oi.C TESTING: Test reports showing density compliance, from a certified testing laboratory, shall be submitted to the County Engineer. Minimum tests made and submitted shall be one for each 2000 square yards of roadway crown surface with a minimum of one report per project (If .-~ deemed sufficient by the County Engineer or his designated representative). Such tests shall be by and at the expense of the owner. Additional testing may be required and, if necessary, will be made by the County Engineer and cost thereof paid by Ken County. 9,Ol.D INSPECTION: The subgrade shall be inspected and approved, in writing, by the County Engineer, or his designated representative, prior to the placement of any base on subject grade. 9.02 GRADING: The roadway area, (subgrade, ditches and slopes), shall be constructed in accordance with the typical sections shown in Appendix K and made a part hereof and with the following requirements: 9.02.A EMBANKMENTS: Embankments shall be placed in lifts of not more than eight (8} inches loose depth and each lift shall be thoroughly compacted by sprinkling and rolling before placement of succeeding lifts. 9.02.8 UNSTABLE MATERIAL: Unstable material encountered in either excavated section or beneath embankments shall be removed to a depth of not less than one foot below natural ground or finished subgrade and replaced by satisfactory material. Material so removed shall be removed from the ROW. Pn~e 1 to/2R/y? "~ 9.03 ROADWAY DITCHES: Ditches intended for parallel drainage shall be designed to accommodate runoff to be expected at a ten (10) year frequency. On grades of more than three (3} percent, in friable soils, erosion control by sodding and/or seeding or by properly designed checks of concrete, stone or sod blocks shall be included. 9.04 CULVERTS: Cross drainage culverts shall be designed for runoff to be expected at twenty-five (25} year frequency; may be either standard reinforced concrete pipe, corrugated galvanized metal pipes or reinforced concrete boxes; and shall be capable of sustaining "H-15-Highway Loading." No box culvert shall be smaller than two (2) feet in either waterway height or depth. No pipe structure shall have waterway area of less than 1.76 square feet (1$ inch diameter). 9.05 SIDEROAD OR ENTRANCE CULVERTS: No entrance culvert shall be less than twenty (20') feet in length with waterway of not less than 1.76 square feet (18 inch diameter)) and shall be designed for runoff of ten (10) year frequency. Headwalls, if placed, shall be of reinforced concrete or course laid masonry, and shall be not higher than six (6) inches above the base crown elevation. 9.06 BRIDGES: All bridges shall be designed by a Registered Professional Engineer with at least five years experience in bridge design. The load capacity shall be not less than "H- t 5". Bridges shall be founded and protected by riprap to withstand floods of one hundred (100) year frequency. 9.07 OVERFLOW SECTIONS: In general the Commissioners' Court will consider allowing the installation of overflow sections (low water crossings). Such consideration will adjudge the probable frequency and depth of overflow, the traffic potential and the nature of the tributary area. The following conditions are considered suitable for the installation of overflow sections: 9.07.A DRAINAGE COURSES: Drainage courses having no defined channel where channel construction would possibly develop liability for diversion or concentration of runofF. 9.07.B STREAMS: Streams having a defined channel for normal flow and usual runoff with a wide flood plain covered by infrequent storms. 9.07.C STREAM CROSSINGS; Stream crossings where traffic potential -- does not economically warrant bridge construction. Page 2 10/28/92 9.07.D CONSTRUCTION: Overflow sections shall be of reinforced concrete, not less than five (5) inches in thickness and containing 4-1/2 to 5 sacks of portland cement per cubic yard of finished concrete; shall extend horizontally between high water elevation calculated for a design storm frequency as noted in Appendix J; and perimeter footing shall extend downward to stable foundation. 9.07.D.1 REINFORCEMENT: Reinforcement shall be not less than No. 4 bars placed fourteen (14") inches on centers, both longitudinally and transversely. Laps, if required, shall be not less than fifteen (IS) inches and shall be staggered in position. ` 9.07.D.2. CROWN WIDTH: The crown width of overflow sections shall be not less than two (2) feet wider than the approach pavement or surface. 9.08 BASE OR BASE COURSES: 9.08.A MATERIAL: Material for base courses may be either crushed limestone, caliche, calcareous gravel, or other good quality road building materials that meets the following physical requirements: Retained on Square Sieve (%~ 0-10 45-75 60-85 Sieve 1-314" #4 #40 Liquid Limit of Soil Binder Plasticity Index Linear Shrinkage, percent 40 Maximum 12 Maximum, 4 Minimum 7 1/2 Maximum 9.08.B CONSTRUCTION METHODS: Base on all streets within the property shall have a compacted base depth of not less than six (6 ") inches and shall be constructed in two approximately equal courses. The material shall be dumped, spread, mixed, windrowed, watered and other operations necessary to produce a uniformly blended mixture of the desired course thickness, moisture condition and gradation. Shaping of the blended mixture to the required grade and line shall follow the mixing procedure and precede the compaction. Compaction of each course of crushed stone flexible base material shall be accomplished by suitable equipment to obtain a minimum density of 95% of AASHO T180-61 (Standard Proctor). Moisture content shall he maintained near optimum during compaction. Soft spots that develop during compaction will be removed and replaced to the required density. Page 3 10/28/9? "~ Areas that show evidence of segregation shall be replaced before the compaction of the course is completed. The same procedures shall be used in the construction of each course. 9.08.C VARIANCES: The Commissioners' Court may permit minor variances from soil constant requirements stated in the above listed specifications when the minimum compacted depth of course is increased from the minimum stated. 9.O8.D TESTING OF MATERIAL: Prior to delivery of base material to the road or street, the results of physical tests of the material proposed for use shall be submitted to the County Engineer for approval. These test results shall be certified as conforming to the requirements by an approved commercial laboratory. The certification shall define the area and volume represented by the tabulated results. 9.09 PRIME COAT: After final finishing, curing and correction of any irregularities developed during the curing period have been corrected, the area of the base which is to receive surfacing may be primed with an application of approximately two-tenths (0.2) gallons of MC-30 cutback .- asphalt, or equivalent, per square yard of surface covered. Generally traffic shall be diverted from the primed area until placement of the surface. Should diversion of traffic not be feasible, the prime coat shall be blanket rolled with a pneumatic roller immediately following application. Prime coat shall be permitted to cure following application and before application of surface courses of pavement. 9.10 SURFACE TREATMENT: At the discretion of the developer paving may be delayed until there are enough occupants and traffic to assure street and road stability. Paving in large acreage tracts may or may not be required at the discretion of the Commissioners' Court. All streets and roads in subdivisions, and providing access thereto, which are provided with a wearing surface shall meet the following standards: 9.10.A ASPHALT SURFACE: 9.10.A.I ASPHALT: A two course asphalt surface treatment composed of asphalt and aggregates of the grades and rates of distribution shown below: asphalt shall be Grade AGS, or CRS-2 emulsion, except that Grade AC-10 may be placed on roads having sharp curves and steep grades during the period May 1st to June 15th. Total asphalt, both courses, not less --1 than 0.6 gallon per Square Yard. Pl1ge 4 10/28/92 ~"' 9.10.A.2 crushed gravel, gravel the Texas Department Specifications. AGGREGATES: Aggregates may be crushed limestone, or limestone rock asphalt, grading as established by of Highways and Public Transportation Standard 9.10.A.3 GRADING RATES OF DISTRIBUTION: First Course: Asphalt Grade AC-5 or CRS-2 emulsion (or AC-10) 0.25 to 0.35 gallon per Sq. Yd.) Aggregate Not finer than Grade 4; Cu. Yd. per $5 to 95 Sq_ Yds. Second Course: Asphalt Grade AC-5 or CRS-2 emulsion (or AC-10) 0.30 to 0.40 gallon per Sq. Yd. Aggregate Not finer than Grade 6~ Cu. Yd. per l i0 to 125 Sq. Yds. 9.10.E BFI'UNIMOUS CONCRETE: Should the developer elect, a bituminous concrete pavement may be placed in lieu of the minimum surface treatment described provided a seal coat of grade 4 rock and oil is applied first. Such pavement may be either Hot Mix Asphaltic Concrete Pavement or Limestone Rock Asphalt Pavement, either proportioned, mixed and laid as required by the pertinent specifications of the Texas Department of Highways and public Transportation, and providing that any: "Limestone Rock Asphalt Pavement must be placed with an approved spreading and finishing machine and rolling must be delayed for a period sufficient for evaporation of moisture and volatiles." 9.10.C QUALITY AND SPREAD RATE: Bituminous Concrete Pavement shall be placed in such quantity and spread at such rate as to provide a minimum campacted depth of mat of one and one-half (I-112) inch. 9.10.D SURFACE TREATMENT: Surface treatment andlor bituminous concrete pavement shall be blanket rolled at least once each day during three days following placement. Page S 10/28/92 `' 9.10.E NEITHER SURFACE TREATMENTS OR ASPHALTIC CONCRETE SHALL BE PLACED AT ANY TIlViE WHEN 1. The air temperature is below 60 F and falling; 2. The air temperature is below 50 F and rising; and 3. The roadway surface temperature is below 60 F. 9.11 CURBED STREETS: Where streets or roads are proposed to be provided with curbs or curbs and gutters, design and construction details shall be in conformity with the attached typical section. The curbed section shall be centered within the available right-of-way. 9.12 SHOULDERS: Untreated shoulders shall be bladed and dragged for uniformity after placement of the surface and shall be smooth, stable and well compacted for the entire width. The thickness of base shall not vary from the prescribed thickness by more than one half (1!2) inch at any point tested. 9.13 CATTLE GUARDS: The Commissioners' Court will authorize the installation of cattle guards when considered essential to public safety. When permitted, a cattle guard shall be not less than six {6) feet in width, ,-. measured along the center of the road and of a length not less than one foot greater than the width of the pavement or 20 feet whichever is greater. 9.13.A DECK MEMBERS: Deck members shall be either weldable upset carbon steel tubing two and three eighths {2-3/8) inches outside diameter or relayer rails weighing not less than seventy (70) pounds per yard. 9.13.B SUPPORT MEMBERS: Support members shall be structural steel shapes of size and section adequate for H-15 loading with twenty-five (25) percent impact allowance. Support sections shall be spaced not more than thirty-one (31) inches for tubing decks or forty-eight (48) inches for rail decks. Units may be prefabricated or welded in place, provided fastenings to masonry foundation are arranged for ready removal. for cleanout. Supporting masonry shall extend to firm foundation or shall be designed as an open flume with ends closed except where structure serves as a drainage structure. Pit drainage shall be provided closed end structures. 9.14.A REOIAREMENTS: 9.14.A.1 Primary Arterial: The design parameters for this classification of street shall be determined on a case basis, taking into -- account all relevant factors. The ultimate design will be as determined by the County Engineer and approved by the Commissioners' Court. Page 6 10/28/92 9.14.A.2 Secon~ry. Art~rsal: Minimum ROW ........................................................................................ 8 0' Minimum crown of roadway ............................................................ 3 6' Minimum section if curbed (face to face of curbs) ............. 3 6' Minimum compacted depth of base material .......................... 8' Minimum ditch depth (below subgrade at shoulder).......... 12" Minimum pavement width ................................................................ 2 4' Maximum allowable grade ............................................................... 9~ 9.14.A.3 oliector: Minimum ROW ...................................................................................... 6 0' Minimum crown of roadway ............................................................ 3 0' Minimum section if curbed (face to face of curbs) ............. 3 0' Minimum compacted depth of base material .......................... 6" Minimum ditch depth (below subgrade at shoulder)............ 12" Minimum pavement width ................................................................ 2 0' Maximum allowable grade ............................................................... 9% 9.14.A.4 Local Street or Road: Minimum section if curbed (face to face of curbs) ............. 3 0' Minimum compacted depth of base material ......................... 6" Minimum ditch depth (below subgrade at shoulder .............. 12" Minimum pavement width ................................................................ 2 0' Maximum allowable grade ............................................................... 15 ~ Minimum ROW ........................................................................................ 5 0' Minimum crown of roadway ............................................................ 3 0' 9.15.A.5 Minor Street or Road• Minimum Cleared ROW ....................................................................... 40' Minimum crown of roadway ............................................................ 3 0' Minimum section if curbed (face to face of curbs) ............. 3 0' ................ .. Minimum compacted depth of base material b" Minimum ditch depth (below subgrade at shoulder)............ 12" Minimum pavement with .................................................................. 18' Maximum allowable grade .......................................................... 15% Page 7 10/28!92 9.14.A.6 Access Road: This type of read shall be mandated by the Commissioner's Court in those cases where a ROW exists and minimal access is desired (i.e. replats). Minimum Cleared ROW ................................................................... 3 0' Minimum crown of roadwav ........................................................ 12' ............................................................ Minimum shoulders width ' ....................... Minimum compacted depth of base material 4" Minimum ditch depth ....................................................................... 12 " 9.14.A.7 NOTES: 1) The Construction standards established for roads in Kerr County are minimums, and will only be applicable to construction of roads for certain subgrade and drainage conditions. 2) The minimum right of way indicated above is considered adequate for streets with curb and gutter (most conditions} and streets without curb and gutter under ideal conditions. The minimum acceptable right of way on all streets and roads will be dependent upon the width of pavement, shoulders, drainage ditches, and amount of cut or fill involved in the design. 3) Access roads shall be located in the existing ROW and followthe existing land form where ever possible. Excessively sharp curves or steep grades, as determined by the County Engineer,will not be permitted. 9.14.B CURVES: ~~ ~ I ~~~~ 55 1050' 5 Desirable 50 700' 8 Minimum 40 740' 12 Special Conditions 30 280' 21 Subdivision Streets 9.14.0 GRADIENT: PER„~NT ~q Desirable qq Maximum 1S% Special Conditions Page 8 10!28/92 9.14.D PASSING SIGHT DISTANCE: .PEED 55 MPH 45 MPH 30 MPH LEN TI-~ 2000' 1200' 600' 9.14.E i~~D~IlMU1VI INTERSECTION RADII: ANGLE OF TURN RADIUS 90 30' 75 35' 60 40' 45 50' 30 60' Section X INSPECTIONS, APPROVAL AND ACCEPTANCE Desirable Minimum Subdivision Street 10.01 INSPECTIONS: The designated County Official or an authorized inspector working for the County, may at the direction of the County, inspect all property site work at any time and any stage. 10.02 APPROVAL: Streets and roads will not receive consideration for final approval by the Commissioners' Court until at least one year after all paving is completed. 10.03 ACCEPTANCE: Acceptance for County maintenance will only be considered when there has been sufficient development to assure streets and roads stabilty. Sufficient development shall be at the discretion of the Commissioners' Court. Page 9 10/2&/92