HAROLD COFFEY CONSTRUCTION CO INC

CONTRACT FOR BELOW KENNETT SEEPAGE REMEDIATION, PHASE II, DUNKLIN CO., MO, DRAINAGE DISTRICT NO. 4 - MAINTENANCE. REVISE ESTIMATED QUANTITIES TO PROVIDE A MORE REALISTIC ESTIMATE OF THE REMAINING QUANTITIES NEEDED TO COMPLETE THE SPECIFIED WORK.

THIS MODIFICATION ADDRESSES THE NEED FOR ADDITIONAL SLOPE PROTECTION ALONG DITCH 2, INCLUDING EXCAVATION, RIPRAP (R-90), AND BEDDING MATERIAL TO SATISFY THE SLOPE STABILITY PROBLEM TO THE SLOPE ADJACENT TO THE COUNTY ROAD.

THIS MODIFICATION TO THE CONTACT IS TO REVISE THE ESTIMATED QUANTITIES TO PROVIDE AN UPDATED AND MORE REALISTIC ESTIMATE OF THE REMAINING QUANTITIES NEEDED TO COMPLETE THE SPECIFIED WORK.

THIS MODIFICATION PROVIDES FOR THE ADDITIONAL INVERTED FILTER IN DITCH 3 RESULTING FROM NECESSARY OVER EXCAVATION TO REACH A WIDTH AND DEPTH THAT PROVIDED SUFFICIENT STABILITY FOR THE INSTALLATION OF GEOTEXTILE AND STONE PER THE CONTRACT DRAWINGS.

THIS MODIFICATION IS TO EXCAVATE, DISPOSE, AND BACKFILL EXISTING DITCH FROM LM 20/29+00TO LM 20/55+00 AND FROM LM 21/24+00 TO LM 21/49+50.

THIS MODIFICATION ADDRESSES THE ADDITION OF A FIELD ROAD AND TAIL DITCH ALONG DITCH 3 FROM STA 26+00 TO STA 38+21 SOUTH OF HWY 84 AND STA 29+00 TO STA 41+00 NORTH OF HWY 84.

THIS CHANGE IS TO EFFECT AGREEMENTS MADE ON PRICE AND TIME PROVIDE FOR SHIFTING OF THE DITCH 3 CENTERLINE BY 30 BEGINNING THE TRANSITION STARTING AT ORIGINAL C/L STATION 28+00 TO AN OFFSET OF -30 AT C/L STATION 26+00.

THIS CHANGE IS TO EFFECT AGREEMENTS MADE ON PRICE AND TIME FOR THE ADDITION OF TWO 24 IN. GRADE STABILIZATION STRUCTURES, INCLUDING GRADING, RIPRAP (R-200), BEDDING MATERIAL, AND GEOTEXTILE (NON-WOVEN) TO RELIEVE AGRICULTURAL FIELDS OF PONDING WATER.

THIS MODIFICATION ADDRESSES THE REVISED CONSTRUCTION LIMITS AND THE EXTENSION OF THE DITCH 3 INVERTED FILTER SECTION, INCLUDING COARSE AGGREGATE AND GEOTEXTILE (NON-WOVEN), BY 122 LF.