20250291.Mesa County Drainage Improvements.pdf

PDF 21 MB Posted Oct 30, 2025

Attached to: 35 8/10 Drainage Improvements Project
Solicitation number: IFB-25-35-8.10
Issued by: Mesa County, Colorado

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Written by GovTribe AI · Oct 30, 2025

These are construction plans for Mesa County's 35 8/10 Road Drainage Improvements project, prepared by Bohannan Huston engineering firm for Mesa County, Colorado. The project involves drainage infrastructure improvements along the 35 8/10 Road, with a total project area of approximately 6.66 acres. The project includes clearing and grubbing, removal of existing materials, excavation, storm drain installation, asphalt patching, and associated drainage system upgrades. Key components include installing 30-inch RCP storm drain pipes, constructing standard shallow manholes with flapgates, and modifying existing drainage structures. The project documents are dated October 2025 and are marked as 100% complete design plans for review.

The project scope involves detailed drainage management, including managing runoff across multiple sub-basins with varying impervious percentages. The existing site currently has a total impervious area of 24.80%, with runoff calculations provided for 2-year, 10-year, and 100-year storm events. The proposed drainage plan maintains similar hydrological characteristics, with design points and flow paths carefully mapped to ensure proper water management. Environmental considerations are prominent, with notes addressing utility coordination, dust control, erosion management, and potential archaeological or ecological sensitivities. The project will require careful coordination with local utilities, including the Ute Water Conservancy District, and adherence to Mesa County and Colorado Department of Transportation standards.

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Other files

File	Type	Posted
20250291.Final Drainage Report.pdf	PDF	Oct 30, 2025
IFB-25-35-8.10.pdf	PDF	Oct 30, 2025
20250291 Unit Price Bid Proposal.xls	XLS spreadsheet	Oct 30, 2025

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DESCRIPTION

COVER SHEET

GENERAL NOTES

SUMMARY OF QUANTITIES

SITE PLAN

GRADING AND STORM DRAIN PLAN

EXISTING DRAINAGE PLAN

PROPOSED DRAINAGE PLAN

DETAILS

1 G-01 2-3 G-02-G-03 4 G-04 5 G-05 6 G-06 7 G-07 8 G-08 9 D-01

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NUMBER

SHEET

NUMBER

MESA COUNTY 35 8/10 RD DRAINAGE IMPROVEMENTS

FOR

PROJECT # 20250291

INDEX

MESA COUNTY, COLORADO

CONSTRUCTION PLANS

20250291 G-01 1 9

REVISION DATE

VICINITY MAP

1"=500'

THESE PLANS HAVE BEEN PREPARED BY ME OR UNDER MY DIRECT SUPERVISION/

[ENGINEER'S PRINTED NAME

COLORADO P.E. NO. [XXXXX]

PROJECT LOCATION

W Y O M I N G

N E W M E X I C O O K L A H O M A

U T

A H

K A N S A S

N E B R A S K A

DENVER

PALISADE

COLORADO

SPRINGS

FORT COLLINS

MONTROSE

CORTEZ

DURANGO

PAGOSA

SPRINGS

SILVERTON

ALAMOSA

WALSENBURG

TRINIDAD

LA JUNTA

PUEBLO

CHEYENNE

WELLS

BURLINGTON

BOULDER

DINOSAUR PROJECT LOCATION

R D

GOVERNMENT HIGHLINE CANAL

PRICE DITCH RD

R D

G 4/10 RD

R D

I-70

STUB DITCH RD

MESA COUNTY 35 8/10th ROAD

DRAINAGE IMPROVEMENTS

COVER SHEET

Water - UTE WATER DISTRICT

DAVE PRISKE...................................... 970-256-2876

Electric - XCEL ENERGY

TILLMON MCSCHOOLER................... 970-270-1953

Gas - XCEL ENERGY

TILLMON MCSCHOOLER................... 970-270-1953

Phone - CENTURY LINK/LUMEN

CHRIS JOHNSON................................ 970-730-2465

UTILITY CONTACTS

October 7, 2025

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ENGINEERS STAMP & SIGNATURE

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GENERAL NOTES

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1. THE CONTRACTOR SHALL ABIDE BY ALL LOCAL, STATE, AND FEDERAL LAWS, REGULATIONS, AND RULES WHICH APPLY.

2. THE TERM "THE ENGINEER" USED THROUGHOUT THESE PLANS REFERS TO THE ENGINEER OF RECORD AS INDICATED BY THE ENGINEER'S STAMP ON A GIVEN SHEET OF THE PLANS.

3. THE TERM "THE PROJECT MANAGER" USED THROUGHOUT THESE PLANS REFERS TO THE MESA COUNTY PROJECT MANAGER OR THEIR ASSIGNED DELEGATE.

4. LOCATIONS OF EXISTING UTILITIES SHOWN ON THESE PLANS AREA APPROXIMATE ONLY, THE CONTRACTOR IS TO CONTACT ANY AFFECTED UTILITY FOR SPECIFIC LOCATIONS BEFORE WORK

COMMENCES.

5. ALL UTILITY INSTALLATIONS ARE TO BE PERFORMED IN ACCORDANCE WITH STATE, COUNTY AND LOCAL REGULATIONS

6. CONTRACTOR SHALL NOTIFY THE ENGINEER DUE TO UNANTICIPATED CONDITIONS ENCOUNTERED ON-SITE DURING COMPLETION OF THE WORK WHICH WOULD CAUSE THE DESIGN PLANS TO BE

MODIFIED.

7. CONTRACTOR SHALL CONFINE THE CONSTRUCTION OF OPERATIONS TO THE LIMITS OF DISTURBANCE AND LIMITS OF GRADING SHOWN ON THESE PLANS. ANY DAMAGE TO FACILITIES OUTSIDE OF

THESE LIMITS OR LABELED AS TO REMAIN OR PROTECT IN PLACE SHALL BE REPAIRED BY THE CONTRACTOR AT NO EXPENSE TO THE OWNER.

8. ALL CONSTRUCTION, RELATED WORK, MATERIALS, PERFORMANCE, AND QUALITY OF WORK PROVIDED SHALL CONFORM TO STATE, COUNTY AND LOCAL REGULATIONS

9. CAUTION: THESE DRAWINGS DO NOT INCLUDE NECESSARY COMPONENTS FOR CONSTRUCTION SAFETY WHICH SHALL REMAIN THE RESPONSIBILITY OF THE CONTRACTOR. ALL WORK ON THIS

PROJECT SHALL BE PERFORMED IN ACCORDANCE WITH APPLICABLE FEDERAL, STATE AND LOCAL LAWS, RULES AND REGULATIONS CONCERNING SAFETY AND HEALTH. ALL EXCAVATION, TRENCHING AND SHORING ACTIVITIES MUST BE CARRIED-OUT IN ACCORDANCE WITH OSHA 29 CFR 1926, SUBPART P-EXCAVATIONS.

10. ALL WORK ON THIS PROJECT SHALL BE PERFORMED IN ACCORDANCE WITH APPLICABLE FEDERAL, STATE AND LOCAL LAWS, RULES AND REGULATIONS CONCERNING SAFETY AND HEALTH.

11. THE CONTRACTOR SHALL BE RESPONSIBLE FOR MISCELLANEOUS SITE PREPARATION AND CLEANUP WORK REQUIRED TO COMPLETE THE PROJECT.

12. THE CONTRACTOR SHALL NOTIFY THE PROJECT MANAGER IN WRITING A MINIMUM OF FIVE (5) WORKING DAYS PRIOR TO THE START OF ANY WORK WITHIN ANY COUNTY RIGHT-OF-WAY.

13. CONTRACTOR SHALL PROVIDE AS-BUILT REDLINE DRAWINGS FOR ALL UTILITIES INSTALLED BY THE PROJECT, STAMPED WITH ELEVATION AND LOCATIONS. ALL WATER, SEWER, STORM AND

IRRIGATION LINES SHALL BE SURVEYED IN 3 DIMENSIONS AT EACH END AND AT ALL ANGLE POINTS OR CONNECTION POINTS.

14. CONTRACTOR SHALL NOTIFY ALL ADJACENT PROPERTY OWNERS AND COORDINATE WITH THE PALISADE IRRIGATION DISTRICT PRIOR TO THE START OF CONSTRUCTION.

GENERAL NOTES:

GOVERNING SPECIFICATIONS:

1. ALL WORK DETAILED ON THIS PLAN SET TO BE PERFORMED UNDER CONTRACT SHALL BE PERFORMED IN ACCORDANCE WITH MESA COUNTY STANDARD SPECIFICATIONS.

2. THE CONTRACTOR SHALL ABIDE BY ALL LOCAL, STATE, AND FEDERAL LAWS, REGULATIONS, AND RULES WHICH APPLY TO THIS PLAN SET.

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AS-BUILT:

SPECIAL NOTICES

DAMAGE/DISTURBANCE:

1. EXCEPT WHERE CALLED OUT TO BE REMOVED UNDER THE CONTRACT, THE CONTRACTOR SHALL BE RESPONSIBLE FOR ANY DAMAGE CAUSED BY THE CONTRACTOR TO EXISTING WALLS, FENCING, SIGNING, SIDEWALKS, WHEELCHAIR RAMPS, DRIVEPADS, TRAIL SURFACES, IRRIGATION LINES, LANDSCAPING, VALVE BOXES, MANHOLES, CONDUITS, UTILITY LINES, CURB AND GUTTER, TRAFFIC SIGNS, PAVEMENT, PAVEMENT MARKINGS, SPEED HUMPS, ETC. DURING CONSTRUCTION AND SHALL REPAIR OR REPLACE SAME AT THE CONTRACTOR'S EXPENSE.

2. UPON COMPLETION OF CONSTRUCTION, ALL AREAS WITHIN PROJECT LIMITS WHICH ARE DISTURBED OR ARE TO BE RE-VEGETATED SHALL BE SEEDED IN ACCORDANCE WITH MESA COUNTY STANDARDS "SEEDING

(NATIVE) (HYDRAULIC)" OF THE CDOT STANDARD SPECIFICATIONS.

DISPOSAL:

1. DISPOSAL OF UNSUITABLE MATERIALS & DEBRIS: THE CONTRACTOR SHALL NOTIFY THE PROJECT MANAGER IN WRITING OF THE DETAILS OF THE DISPOSAL OPERATIONS. BORROW, MATERIALS, ROCK WASTE, VEGETATION DEBRIS, ETC., SHALL NOT BE PLACED IN WETLAND AREAS OR AREAS WHICH MAY IMPACT ENDANGERED SPECIES OR ARCHAEOLOGICAL RESOURCES. AN ARCHAEOLOGICAL SURVEY AND ENVIRONMENTAL CLEARANCE SHALL BE OBTAINED BY THE CONTRACTOR BEFORE DISPOSAL SITES ARE ACCEPTED IN ACCORDANCE WITH SECTION 107.25 OF THE CDOT STANDARD SPECIFICATIONS FOR HIGHWAY AND BRIDGE CONSTRUCTION. THE COST FOR PERFORMING THIS WORK IS INCIDENTAL TO THE CONTRACT AND NO SEPARATE PAYMENT SHALL BE MADE THEREFOR.

2. DISPOSAL SITE(S) FOR ALL EXCESS EXCAVATION MATERIAL, ASPHALT PAVING, DRIVEWAYS AND OTHER REMOVAL ITEMS SHALL BE LOCATED BY THE CONTRACTOR. ALL COSTS INCURRED IN OBTAINING A DISPOSAL SITE AND HAUL THERETO SHALL BE CONSIDERED INCIDENTAL TO CONSTRUCTION AND NO DIRECT PAYMENT WILL BE THEREFOR. THE DISPOSAL SITE SHALL BE ENVIRONMENTALLY ACCEPTABLE AND APPROVED BY THE PROJECT MANAGER. ALSO, A PERMITTED FACILITY FOR DISPOSAL OF HAZARDOUS WASTE SHALL BE LOCATED AND APPROVED BY PROJECT MANAGER.

3. THE CONTRACTOR SHALL PROPERLY HANDLE AND DISPOSE OF ALL CLEAN ASPHALT PAVEMENT AND CONCRETE MATERIAL TO BE REMOVED ACCORDING TO THE PLANS. CLEAN ASPHALT IS CLASSIFIED AS FILL MATERIAL AND IS NOT SUBJECT TO THE SOLID WASTE MANAGEMENT REGULATIONS OF THE COLORADO ENVIRONMENTAL DEPARTMENT. CLEAN IS DEFINED AS "BEING FREE OF SOLID WASTE OR CONTAMINANTS WHICH HAVE THE POTENTIAL OF MIGRATING INTO SURFACE OR GROUND WATER". THE MATERIAL SHALL BE COVERED WITH TWO FEET OF CLEAN EARTH IMMEDIATELY AFTER DISPOSAL. THE MATERIAL CANNOT BE PLACED IN A WATERCOURSE, ARROYO, OR WITHIN 10 FEET OF GROUNDWATER. IF THE ASPHALT AND CONCRETE MATERIAL IS NOT CLEAN, IT IS SUBJECT TO THE SOLID WASTE ACT AND MUST BE PLACED IN AN APPROVED LANDFILL. ALL DISPOSAL SITES ARE SUBJECT TO THE APPROVAL OF THE RESPECTIVE LANDOWNER AND THE PROJECT MANAGER. THE COST FOR PERFORMING THIS WORK IS INCIDENTAL TO THE CONTRACT

AND NO SEPARATE PAYMENT SHALL BE MADE THEREFOR.

ENVIRONMENTAL NOTES:

1. THE CONTRACTOR SHALL ENSURE THAT DAMAGE TO OR REMOVAL OF VEGETATION WILL BE KEPT TO A MINIMUM AND THAT NO EXTRANEOUS CLEARING, GRUBBING, LAND DISTURBANCE OR EXCAVATION WILL TAKE PLACE. CONSISTENT WITH THE REQUIREMENTS OF THE CDOT'S STANDARD SPECIFICATIONS SECTION 107.12 PROTECTION & RESTORATION OF PUBLIC AND PRIVATE PROPERTY, AND SECTION 201-00001, CLEARING & GRUBBING. THE CONTRACTOR SHALL SEE TO IT THAT TREES AND SHRUBS WITHIN THE RIGHT-OF-WAY AND ALONG THE FENCE LINES ARE NOT OVERRUN OR DAMAGED BY CONSTRUCTION EQUIPMENT

UNNECESSARILY.

2. CONTRACTOR SHALL CONFORM TO ALL LOCAL AND FEDERAL DUST AND EROSION CONTROL REGULATIONS. THE CONTRACTOR SHALL PREPARE AND OBTAIN ANY DUST CONTROL OR EROSION CONTROL PERMITS FROM THE APPROPRIATE REGULATORY AGENCIES. WATERING, AS REQUIRED FOR CONSTRUCTION DUST CONTROL, SHALL BE CONSIDERED INCIDENTAL TO CONSTRUCTION AND NO SEPARATE MEASUREMENT OR PAYMENT SHALL BE MADE. THE COST OF PERFORMING THIS WORK IS INCIDENTAL TO THE CONTRACT AND NO SEPARATE PAYMENT SHALL BE MADE THEREFOR.

3. CONSTRUCTION AREAS SHALL BE WATERED FOR DUST CONTROL IN COMPLIANCE WITH GOVERNMENT ORDINANCES. THE CONTRACTOR SHALL COORDINATE WITH THE UTE WATER CONSERVANCY DISTRICT FOR WATER AVAILABILITY AND USE. THE CONTRACTOR SHALL SUPPLY ALL EQUIPMENT AND MATERIALS NECESSARY FOR PROVIDING WATER. THE CONTRACTOR SHALL CONFINE HIS WORK WITHIN THE CONSTRUCTION EASEMENT LIMITS AND/OR RIGHT-OF-WAY OR PROVIDE COPIES OF AGREEMENTS WITH ADJACENT LANDOWNERS TO THE COUNTY. CONSTRUCTION MATERIAL AND WASTE PRODUCTS, INCLUDING MACHINERY LEAKAGE, MAINTENANCE MATERIAL AND SPILLS, WILL BE CONTAINED AND PROPERLY DISPOSED PRIOR TO PROJECT COMPLETION. SPILLS SHALL BE PROPERLY DISPOSED OF AS SOON AS POSSIBLE.

4. THE CONTRACTOR SHALL BE RESPONSIBLE FOR REPORTING AND CLEANUP OF SPILLS ASSOCIATED WITH PROJECT CONSTRUCTION AND SHALL REPORT AND RESPOND TO SPILLS OF HAZARDOUS MATERIALS SUCH AS GASOLINE, DIESEL, MOTOR OILS, SOLVENTS, CHEMICALS, TOXIC AND CORROSIVE SUBSTANCES, ETC., WHICH MAY BE A THREAT TO PUBLIC HEALTH OR THE ENVIRONMENT. THE CONTRACTOR SHALL BE RESPONSIBLE FOR REPORTING DISCOVERIES OF PAST SPILLS AND OF CURRENT SPILLS NOT ASSOCIATED WITH CONSTRUCTION. REPORTS SHALL BE MADE IMMEDIATELY TO THE CO DEPARTMENT OF PUBLIC HEALTH & ENVIRONMENT AT 1-877-518-5608. THE COST FOR PERFORMING THIS WORK IS INCIDENTAL TO THE CONTRACT AND NO SEPARATE PAYMENT SHALL BE MADE THEREFOR.

5. IF ANY THREATENED OR ENDANGERED SPECIES OR THEIR HABITATS ARE DISCOVERED DURING CONSTRUCTION, WORK WILL CEASE IMMEDIATELY AND THE USFWS WILL BE NOTIFIED IN ORDER THAT APPROPRIATE

MEASURES CAN BE TAKEN IN ACCORDANCE WITH THE ENDANGERED SPECIES ACT.

6. IF HUMAN REMAINS ARE ENCOUNTERED DURING CONSTRUCTION, APPROPRIATE LAW ENFORCEMENT AUTHORITIES AND THE OFFICE OF THE MEDICAL EXAMINER WILL BE CONTACTED.

7. IF CULTURAL MATERIALS ARE DISCOVERED DURING CONSTRUCTION, WORK WILL CEASE IMMEDIATELY, AND EPA AND THE COLORADO STATE HISTORIC PRESERVATION OFFICER AT (303) 866-3392, WILL BE NOTIFIED OF THE DISCOVERY. EPA WILL PROCEED IN ACCORDANCE WITH THE REGULATIONS OF THE ADVISORY COUNCIL ON HISTORIC PRESERVATION PRIOR TO TAKING ANY ACTION WHICH WOULD AFFECT THE CULTURAL

RESOURCES.

1. THE CONTRACTOR SHALL MAINTAIN AN UP-TO-DATE SET OF AS-BUILT PLANS FOR THE PROJECT, PROMPTLY RECORDING DATA, INCLUDING HORIZONTAL AND VERTICAL LOCATIONS FOR ALL UTILITY LINES AND ACCESSORIES, EXISTING OR NEW, REQUIRED BY THE COUNTY FOR THE PREPARATION OF RECORD DRAWINGS BY THE ENGINEER. CONTRACTOR SHALL NOT COVER UTILITY LINES AND ACCESSORIES UNTIL ALL DATA HAS BEEN RECORDED. THE CONTRACTOR SHALL NOT BACKFILL OUTLET PIPES, SCOUR/RETAINING WALLS, ETC. UNTIL ALL DATA HAS BEEN RECORDED. THESE PLANS SHALL BE KEPT CURRENT AND AT THE PROJECT SITE AT ALL TIMES AND SHALL BE AVAILABLE TO THE PROJECT MANAGER AND ENGINEER AT ANY TIME DURING CONSTRUCTION AND WILL BE CHECKED BY THE ENGINEER FOR ACCURACY AND COMPLETENESS ONCE EVERY TWO WEEKS. THE FINAL AS-BUILT PLANS SHALL BE SUBMITTED TO THE PROJECT MANAGER PRIOR TO FINAL

PAYMENT.

1. HAND DELIVER SPECIAL NOTICES TO EACH RESIDENCE OR BUSINESS ADJACENT TO THE CONSTRUCTION AREA AND TO OTHERS WHICH MAY BE AFFECTED BY CONSTRUCTION ACTIVITIES. SPECIAL NOTICES ARE TO INFORM RESIDENTS AND BUSINESSES IN WRITING WHENEVER ACCESS, UTILITY SERVICES, OR OTHER SERVICES TO THEIR PROPERTIES MAY BE IMPAIRED. THIS WORK IS AT THE CONTRACTOR'S EXPENSE AND NO

SEPARATE PAYMENT SHALL BE MADE THEREFOR.

2. THE CONTRACTOR SHALL BE RESPONSIBLE FOR: DELIVERY OF SPECIAL NOTICES NOT MORE THAN SEVEN (7) DAYS PRIOR TO PHYSICAL CONSTRUCTION THAT WILL AFFECT THE PROPERTY. CORRECTED NOTICES ARE TO BE DELIVERED IF CONSTRUCTION DOES NOT START WITHIN 48 HOURS OF DATE GIVEN IN NOTICE.

THE WRITTEN NOTICE IS TO STATE:

· CONTRACTOR'S NAME, ADDRESS, AND LOCAL TELEPHONE NUMBER.

· NATURE OF WORK TO BE DONE AND TIMING OF WORK.

· TIME AND LENGTH OF DISRUPTION TO EXPECT.

· EXPECTED DURATION OF CONSTRUCTION.

· CONTRACTOR'S LOCAL PHONE NUMBER TO WHICH EMERGENCY CONDITIONS CAN BE REPORTED DURING NORMAL WORK HOURS.

· CONTRACTOR'S LOCAL PHONE NUMBER TO WHICH EMERGENCY CONDITIONS CAN BE REPORTED DURING NON-WORKING PERIODS.

3. AT LEAST SEVEN (7) CALENDAR DAYS PRIOR TO THE INSTALLATION OF EACH SERVICE LINE, THE CONTRACTOR SHALL DISTRIBUTE A WRITTEN NOTICE TO EACH EXISTING RESIDENCE OF BUSINESS TO BE SERVICED BY THE LINE, ADVISING THEM OF THE PLANNED SERVICE LINE LOCATION AND PROVIDING A CONTACT NAME, ADDRESS AND PHONE NUMBER FOR ANY COMMENTS REGARDING THE PLAN. THE NOTICE WILL STATE IN

BOTH ENGLISH AND SPANISH:

• THE ADDRESS TO BE SERVED.

• SKETCH WITH VALVE PIT AND SERVICE LATERAL LOCATION.

• CONTRACTOR CONTACT INFORMATION

• ALL MARK-UP/RETURNED VALVE PIT SKETCHES SHALL BE FORWARDED TO ENGINEER/INSPECTOR FOR REVIEW PRIOR TO FINAL PLACEMENT OF VALVE PIT.

• IF RESIDENT DOES NOT RESPOND TO SKETCH, IT SHALL BE ASSUMED THAT THE VALVE PIT LOCATION AND/OR SERVICE LINE LATERAL LOCATION IS ACCEPTABLE AS SHOWN ON PLAN.

1. ALL TRAFFIC SIGNS AND CODING SHALL BE IN CONFORMANCE WITH THE MANUAL ON UNIFORM TRAFFIC CONTROL DEVICES (MUTCD) LATEST EDITION.

2. THE CONTRACTOR SHALL SUBMIT A TRAFFIC CONTROL PLAN (TCP) TO MESA COUNTY FOR CONSTRUCTION BARRICADING AND TRAFFIC CONTROL FOR ANY WORK ON MESA COUNTY RIGHT-OF-WAY.

3. THE CONTRACTOR SHALL BE RESPONSIBLE FOR IMPLEMENTATION AND MAINTENANCE OF ALL TRAFFIC CONTROL PROCEDURES AND FOR MAINTAINING A TRAFFIC CONTROL LOG IN ACCORDANCE WITH THE CONTRACT BID SPECIFICATIONS. EMERGENCY ACCESS MUST BE PROVIDED TO THE IMPACTED PROPERTIES AT ALL TIMES; AT NO POINT DURING CONSTRUCTION MAY ACCESS BE ELIMINATED. PHASING OF WORK

SHALL BE DETERMINED BY THE CONTRACTOR.

4. THE CONTRACTOR SHALL COORDINATE WITH MESA COUNTY VALLEY SCHOOL DISTRICT , MAIL SERVICES, AND WITH GRAND VALLEY TRANSIT TO ACCOMMODATE THE SCHEDULE FOR ALL DESIGNATED BUS ROUTES.

TRAFFIC:

1. WHEN ABUTTING EXISTING AREAS, ALL NEW STREET PAVING, AND DRIVEWAYS SHALL MATCH THE ELEVATION OF THOSE AREAS.

2. WHERE A PROFILE GRADE IS NOT PROVIDED IN THE PLANS, STREET CENTERLINE GRADES SHALL BE RESTORED BY THE CONTRACTOR TO THE EXISTING CENTERLINE GRADES. CROSS SECTION THE EXISTING ROAD PRIOR TO CONSTRUCTION AT 50' MINIMUM SPACING. MINOR ADJUSTMENTS TO THE STREET GRADES MAY BE NECESSARY AND WILL BE DIRECTED BY THE PROJECT MANAGER. MINOR ADJUSTMENTS TO STREET GRADES WILL BE AT THE CONTRACTOR'S EXPENSE AND NO ADDITIONAL MEASUREMENT OR PAYMENT SHALL BE MADE. SMOOTH TRANSITIONS SHALL BE MADE BETWEEN EXISTING PAVEMENT WHICH REMAINS IN PLACE AND PAVEMENT WHICH IS BEING REPLACED. TRAFFIC CONTROL DEVICES, INCLUDING PAVEMENT MARKINGS MUST BE RESTORED TO THE SAME OR BETTER CONDITIONS AS BEFORE CONSTRUCTION.

3. THE FINAL SURFACE OF THE REPLACED PAVEMENT SHALL CONFORM TO A GRADE LINE SET BY THE CONTRACTOR SUCH THAT THE PAVEMENT WILL READILY DRAIN AND DOES NOT VARY SIGNIFICANTLY FROM

ADJACENT EXISTING GRADES.

4. PAVEMENT SAFETY EDGE POLICY: IF A PAVEMENT DROP-OFF IS CREATED DURING CONSTRUCTION, THE CONTRACTOR SHALL INITIATE PROTECTIVE ACTION IN ACCORDANCE WITH THE CDOT CURRENT SAFETY EDGE POLICY. THIS WORK SHALL BE AT THE CONTRACTOR'S EXPENSE AND NO SEPARATE PAYMENT OR MEASUREMENT WILL BE MADE.

5. CONTRACTOR WILL NOT PAVE OVER ANY SURFACE FEATURE, I.E., GAS VALVE, MANHOLE COVER, WATER VALVE, ETC. WITHOUT PRIOR APPROVAL FROM THE PROJECT MANAGER.

PAVEMENT:

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1. ALL UTILITIES, UTILITY SERVICE LINES, AND STORM DRAIN LINES SHALL BE INSTALLED PRIOR TO PAVING.

2. TWO (2) WORKING DAYS PRIOR TO ANY EXCAVATION, CONTRACTOR MUST CONTACT COLORADO ONE CALL SYSTEM, 800-922-1987, FOR LOCATION OF EXISTING UTILITIES.

3. CONTRACTOR SHALL COORDINATE WITH THE UTE WATER CONSERVANCY DISTRICT SEVEN (7) WORKING DAYS IN ADVANCE OF PERFORMING WORK THAT WILL AFFECT THE PUBLIC WATER INFRASTRUCTURE. WORK REQUIRING SHUTOFF OF FACILITIES MUST BE COORDINATED WITH THE UTE WATER CONSERVANCY DISTRICT FOURTEEN (14) DAYS IN ADVANCE OF PERFORMING SUCH WORK. ONLY THE UTE WATER CONSERVANCY DISTRICT CREWS ARE AUTHORIZED TO OPERATE PUBLIC VALVES. CONTRACTOR SHALL COORDINATE SEQUENCING OF ALL PLANNED VALVE CLOSURES. CONTRACTOR SHALL SUBMIT A WATER SHUT OFF PLAN FOR REVIEW AND APPROVAL PRIOR TO BEGINNING CONSTRUCTION ACTIVITIES IN APPLICABLE AREAS.

4. CONTRACTOR SHALL COORDINATE WITH PERTINENT UTILITY COMPANIES OF ALL EXISTING UTILITY LINES AND APPURTENANCES ENCOUNTERED DURING CONSTRUCTION THAT REQUIRE RELOCATION. NO ADDITIONAL COMPENSATION WILL BE ALLOWED FOR DELAYS OR INCONVENIENCES CAUSED BY UTILITY WORK CREWS. THE CONTRACTOR SHALL RESCHEDULE HIS ACTIVITIES AS NECESSARY TO ALLOW UTILITY WORK CREWS TO

PERFORM THE REQUIRED WORK.

5. CONTRACTOR SHALL COORDINATE ANY REQUIRED UTILITY INTERRUPTIONS WITH THE AFFECTED UTILITY COMPANY A MINIMUM OF THREE WORKING DAYS BEFORE THE INTERRUPTION.

6. IF ANY UTILITY LINES, PIPELINES, OR UNDERGROUND UTILITY LINES ARE SHOWN ON THESE DRAWINGS, THEY ARE SHOWN IN AN APPROXIMATE MANNER ONLY, AND SUCH LINES MAY EXIST WHERE NONE ARE SHOWN. IF ANY SUCH EXISTING LINES ARE SHOWN, THE LOCATION IS BASED UPON INFORMATION PROVIDED BY THE OWNER OF SAID UTILITY, AND THE INFORMATION MAY BE INCOMPLETE, OR MAY BE OBSOLETE BY THE TIME CONSTRUCTION COMMENCES. THE ENGINEER HAS CONDUCTED ONLY PRELIMINARY INVESTIGATION OF THE LOCATION, DEPTH, SIZE, OR TYPE OF THE EXISTING UTILITY LINES, PIPELINES, OR UNDERGROUND UTILITY LINES. THIS INVESTIGATION IS NOT CONCLUSIVE, AND MAY NOT BE COMPLETE; THEREFORE, THE ENGINEER MAKES NO REPRESENTATION PERTAINING THERETO, AND ASSUMES NO RESPONSIBILITY OR LIABILITY THEREFOR. THE CONTRACTOR SHALL INFORM ITSELF OF THE LOCATION OF ANY UTILITY LINE, PIPELINE, OR UNDERGROUND UTILITY LINE IN OR NEAR THE AREA OF WORK IN ADVANCE OF AND DURING EXCAVATION WORK. SHALL THE CONTRACTOR PERFORM POTHOLE INVESTIGATION OF EXISTING UTILITY LINES, PIPELINES, OR UNDERGROUND UTILITY LINES TO VERIFY LOCATION, DEPTH, OR TYPE, INCLUDING THOSE NOT SHOWN ON THESE DRAWINGS, SUCH WORK SHALL BE PERFORMED PRIOR TO EXCAVATION. ALL COSTS ASSOCIATED WITH POTHOLE INVESTIGATION SHALL BE INCIDENTAL TO THE WORK AND SHALL NOT BE PAID FOR SEPARATELY. THE CONTRACTOR IS FULLY RESPONSIBLE FOR ANY AND ALL DAMAGE CAUSED BY ITS FAILURE TO LOCATE, IDENTIFY AND PRESERVE ANY AND ALL EXISTING UTILITIES, PIPELINES, AND UNDERGROUND UTILITY LINES. IN PLANNING AND CONDUCTING EXCAVATION, THE CONTRACTOR SHALL COMPLY WITH STATE STATUTES, MUNICIPAL AND LOCAL ORDINANCES, RULES AND

REGULATIONS, IF ANY, PERTAINING TO THE LOCATION OF THESE LINES AND FACILITIES.

7. ALL UTILITY LINES SHALL BE MAINTAINED IN SERVICE. SHORING, SHEETING, AND OTHER MEANS OF SUPPORT SHALL BE EMPLOYED BY THE CONTRACTOR TO PREVENT DAMAGE OR LOSS OF THESE EXISTING UTILITIES AT CONTRACTOR'S EXPENSE. BEAM AND CABLE OR OTHER ADEQUATE SUPPORTS SHALL BE USED FOR TEMPORARY SUPPORT OF ALL UTILITY LINES. ANY DAMAGE TO EXISTING UTILITIES SHALL BE PROMPTLY REPAIRED AT THE CONTRACTOR'S EXPENSE. THE ENGINEER MUST BE IMMEDIATELY NOTIFIED OF ANY SIGNIFICANT DEVIATION OF EXPOSED UTILITIES FROM THE LOCATIONS SHOWN ON THE PLANS SO THAT

CONFLICTS CAN BE RESOLVED IN A TIMELY MANNER.

8. CONTRACTOR SHALL PROVIDE A UTILITY SUPPORT DESIGN FOR ALL LARGE AND/OR CRITICAL SERVICES (E.G. COMMUNICATIONS AND ELECTRIC DUCT BANKS, EXPOSED GRAVITY LINE JOINTS, PRESSURIZED WATERLINES, SEWER FORCE MAINS, ETC.). SUPPORT FOR THESE CRITICAL SERVICES SHALL BE DESIGNED AND SEALED BY A REGISTERED PROFESSIONAL ENGINEER AND SUBMITTED TO THE PROJECT MANAGER FOR APPROVAL. THE DESIGN AND INSTALLATION OF BOTH CRITICAL AND NON-CRITICAL SUPPORTS SHALL BE PERFORMED AT THE CONTRACTOR'S EXPENSE.

1. ALL EXCAVATION, TRENCHING AND SHORING ACTIVITIES SHALL BE CARRIED OUT IN ACCORDANCE WITH OSHA 29 CFR 1926.

2. THE EARTHWORK QUANTITIES WILL BE BASED ON THE METHOD OF MEASUREMENT STATED IN SPECIFICATIONS 203 AND 206.

3. UNLESS OTHERWISE STATED WITHIN THIS PLAN SET, ALL SIDE SLOPES SHALL BE 3:1 (HORIZONTAL TO VERTICAL) MAXIMUM, KEEPING SLOPES FLATTER WHEREVER POSSIBLE. SLOPES SHALL TRANSITION SMOOTHLY

TO EXISTING GRADES IN ALL CASES.

4. THE CONTRACTOR SHALL WARP SLOPES WHERE NECESSARY TO STAY WITHIN THE RIGHT-OF-WAY, CONSTRUCTION EASEMENT, OR GRADING LIMITS.

5. THE DESIGN "R" VALUE FOR THIS PROJECT IS 50. MATERIAL WITH AN "R" VALUE OF LESS THAN 50 SHALL NOT BE PLACED IN, NOR ALLOWED TO REMAIN WITHIN THE TOP TWO FEET OF FINISHED GRADE.

6. SPOIL PILES WILL BE ALLOWED ONLY AS APPROVED BY THE PROJECT MANAGER.

7. NO MATERIAL PITS HAVE BEEN IDENTIFIED FOR THIS PROJECT. THE CONTRACTOR MAY OBTAIN SUITABLE MATERIAL FROM ANY ACCEPTABLE SOURCE, PROVIDED THAT IT MEETS PROJECT SPECIFICATIONS. ALL MATERIAL PIT ACTIONS SHALL BE IN COMPLIANCE WITH SECTION 203 SPECIFICATIONS. NO ADDITIONAL PAYMENT SHALL BE MADE FOR HAULING OF SUCH MATERIAL.

8. CONTRACTOR IS RESPONSIBLE FOR EXAMINATION OF THE SITE AND DETERMINATION OF THE CHARACTER AND QUANTITY OF MATERIALS TO BE ENCOUNTERED.

9. EXCESS SUITABLE SOIL MATERIAL, SHALL BE USED ON-SITE AS NEEDED FOR AESTHETIC FILL AREAS. ON-SITE MATERIAL SHALL BE USED IN LIEU OF IMPORTING OFF-SITE MATERIAL. NO ADDITIONAL PAYMENT WILL BE MADE TO CONTRACTOR UNLESS DIRECTED BY PROJECT MANAGER FOR IMPORT OF OFF-SITE MATERIAL IN LIEU OF USING ON-SITE SOIL MATERIAL NOR WILL ANY ADDITIONAL PAYMENT BE MADE FOR ON-SITE MATERIAL THAT WILL BE USED AS AESTHETIC FILL. VERIFY WITH PROJECT MANAGER PRIOR TO REMOVAL OF ANY EXCESS SOIL MATERIAL FROM JOB SITE.

10. CONTRACTOR SHALL SUPPORT ALL POWER POLES AND FENCES ALONG THE RIGHT-OF-WAY IF NECESSARY DURING CONSTRUCTION OF PROJECT INFRASTRUCTURE. THIS WORK AND ANY COORDINATION EFFORTS REQUIRED AS A RESULT IS AT THE CONTRACTOR'S EXPENSE AND NO SEPARATE PAYMENT SHALL BE MADE THEREFOR.

11. DESIGN AND CONSTRUCTION OF ALL FORMS, SHORING, AND TEMPORARY BRACING SHALL COMPLY WITH 29 CFR 1926 AND THESE COSTS SHALL BE CONSIDERED INCIDENTAL TO THE EARTHWORK COSTS.

GENERAL UTILITY:

1. CONTRACTOR SHALL MAKE ALL WATER VALVES AND VAULT LIDS ACCESSIBLE TO THE OWNER AT ALL TIMES.

2. IF A WATER SERVICE LINE IS DAMAGED, CONTRACTOR SHALL REPLACE FROM MAIN TO METER BOX WITHOUT SPLICING AT NO ADDITIONAL COST TO THE OWNER.

WATER SYSTEMS:

EARTHWORK:

CONSTRUCTION LIMITS AND STORAGE LIMITS:

1. THE CONTRACTOR SHALL BE REQUIRED TO CONFINE THEIR WORK WITHIN THE CONSTRUCTION LIMITS, DESIGNATED CONSTRUCTION EASEMENTS ON THE PLAN SET, AND/OR RIGHT-OF-WAY LIMITS.

2. THE CONTRACTOR SHALL NOT STORE ANY EQUIPMENT OR MATERIAL WITHIN THE PUBLIC RIGHT-OF-WAY DURING NON-WORKING HOURS.

3. THE CONTRACTOR SHALL PARK EQUIPMENT AND VEHICLES SO AS TO NOT INTERFERE WITH NORMAL ACTIVITIES OF RESIDENTS OR OTHER CONTRACTORS ON SITE.

4. THE CONTRACTOR SHALL NOT STORE EQUIPMENT OR MATERIAL WITHIN 20 FEET OF THE EDGE OF THE DRIVING LANE DURING WORK HOURS UNLESS THE EQUIPMENT OR MATERIAL IS PROPERLY SHIELDED UTILIZING CURRENT SAFETY DESIGN AND INSTALLATION METHODS. THE SAFETY DESIGN FOR SHIELDING SHALL BE PROVIDED BY THE CONTRACTOR AND MUST BE APPROVED BY THE ENGINEER BEFORE IMPLEMENTING. THIS WORK, INCLUDING DESIGN, INSTALLATION, AND REMOVAL OF THE SHIELDING, SHALL BE AT THE CONTRACTOR'S EXPENSE AND NO SEPARATE MEASUREMENT OR PAYMENT WILL BE MADE.

SURVEYING

1. THE CONTRACTOR SHALL NOTIFY THE COUNTY SURVEYOR NOT LESS THAN SEVEN (7) DAYS PRIOR TO STARTING WORK IN ORDER THAT THE COUNTY SURVEYOR MAY TAKE NECESSARY MEASURES TO INSURE THE PRESERVATION OF SURVEY MONUMENTS. CONTRACTOR SHALL NOT DISTURB PERMANENT SURVEY MONUMENTS WITHOUT THE CONSENT OF THE COUNTY SURVEYOR AND SHALL NOTIFY THE COUNTY SURVEYOR AND BEAR THE EXPENSE OF REPLACING ANY THAT MAY BE DISTURBED WITHOUT PERMISSION. REPLACEMENT SHALL BE DONE ONLY BY THE COUNTY SURVEYOR. WHEN A CHANGE IS MADE IN THE FINISHED ELEVATION OF THE PAVEMENT OF ANY ROADWAY IN WHICH A PERMANENT SURVEY MONUMENT IS LOCATED, CONTRACTOR SHALL, AT HIS OWN EXPENSE, ADJUST THE MONUMENT COVER TO THE NEW GRADE

UNLESS OTHERWISE SPECIFIED. REFER TO SECTION 629 OF THE SPECIFICATIONS.

2. THE CONTRACTOR IS RESPONSIBLE FOR PROTECTING AND MAINTAINING ALL EXISTING SURVEY MONUMENTATION CONTROLS. SURVEY MONUMENTS DISTURBED BY THE CONTRACTOR SHALL BE RESTORED BY A LICENSED COLORADO SURVEYOR AT THE CONTRACTOR'S EXPENSE. NOTIFY MONUMENT OWNER 48 HOURS PRIOR TO ANY WORK AROUND EXISTING MONUMENTS.

3. CONSTRUCTION SURVEYING SHALL INCLUDE ALL SURVEYING AND CONTROL STAKING NECESSARY TO ESTABLISH THE PROJECT CONSTRUCTION BASELINE, TOE OF SLOPE CATCH POINTS, AND ALL OTHER INFRASTRUCTURE DESIGNATED IN THE CONSTRUCTION PLANS SET AS REQUIRED FOR CONSTRUCTION OF THE PROJECT. SUCH INFRASTRUCTURE SHALL INCLUDE BUT NOT BE LIMITED TO ALL SURFACING, DRAINAGE

PONDS, STORM DRAIN LINES, SEWER LINES, WATER LINES AND SERVICE LINES.

4. IT SHALL BE THE CONTRACTOR'S SOLE RESPONSIBILITY TO REESTABLISH ANY MISSING REFERENCE POINTS REQUIRED FOR CONSTRUCTION OF THE PROJECT INFRASTRUCTURE. ALL COSTS INCURRED IN PROVIDING SUCH CONSTRUCTION STAKING AND SURVEYING WORK SHALL BE PAID AS SHOWN IN THE BID PROPOSAL.

5. ANY DISCREPANCIES BETWEEN THE DESIGN AND SITE CONDITIONS SHALL BE BROUGHT TO THE ATTENTION OF THE ENGINEER IMMEDIATELY.

6. PRIOR TO CONSTRUCTION THE CONTRACTOR SHALL EXCAVATE AND VERIFY THE HORIZONTAL AND VERTICAL LOCATIONS OF ALL OBSTRUCTIONS. SHOULD A CONFLICT EXIST BETWEEN THESE PLANS AND ACTUAL FIELD CONDITIONS, THE CONTRACTOR SHALL PROMPTLY NOTIFY THE ENGINEER IN WRITING SO THAT THE CONFLICT CAN BE RESOLVED WITH A MINIMUM AMOUNT OF DELAY FOR ALL PARTIES.

7. PROJECT SURVEY CONTROL WAS ESTABLISHED AND CHECKED AS DESCRIBED ON SHEETS 8 AND 9.

G-04 4 9

SUMMARY OF QUANTITIES

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MESA COUNTY

35 8/10 DRAINAGE IMPROVEMENTS

BID SPECIFICATION ITEM

ITEM CDOT ITEM DESCRIPTION UNIT ESTIMATED FINAL

NO. NUMBER TYPE QUANTITY QUANTITY

1 201-00000 Clearing & Grubbing LS 1 _____

2 202-00035 Removal of Pipe LF 32 _____

3 202-00220 Removal of Asphalt Mat SY 15 _____

4 203-00000 Unclassified Excavation CY 150 _____

5 212-00006 Seeding (Native) AC 0.02 _____

6 403-00721 Asphalt Patching SY 15 _____

7 603-01185 18" RCP Storm Pipe LF 100 _____

8 603-01305 30" RCP Storm Pipe LF 214 _____

9 603-05012 12" End Section EA 1 _____

10 603-30018 18" End Section EA 1 _____

11 603-50012 12" HDPE Storm Pipe LF 29 _____

12 604-13005 Inlet Type 13 (5-Foot) EA 2 _____

13 604-30010 60" Shallow Standard Manhole EA 2 _____

14 625-00000 Construction Surveying LS 1 _____

15 626-00000 Mobilization LS 1 _____

16 630-10005 Traffic Control LS 1 _____

17 N/A Connect to Existing Irrigation Structure EA 1 _____

18 N/A Gravel SY 29 _____

19 N/A Flap gate EA 1 _____

20 700-70010 Minor Contract Revisions LS 1 _____

50' PALISADE IRRIGATION

DISTRICT EASEMENT739 35 810 RD.

ROW (TYP)

20.0' 30.0'

20.0' DRAINAGE

EASEMENT

TIV

W30

.0'

W 20.0'

IRRIGATION

AND

UTILITY

EASEMENT

30.0' IRRIGATION

AND UTILITY

EASEMENT

GRAVEL TO MATCH EXISTING AFTER

GRADING/STORM DRAIN INSTALL

PR TYPE 13 AREA INLET

SEE GRADING AND UTILITY PLAN

PR MANHOLE

SEE GRADING AND UTILITY PLAN

PR MANHOLE WITH FLAPGATE

SEE GRADING AND UTILITY PLAN

PR FES

SEE GRADING AND UTILITY PLAN

EX IRRIGATION STRUCTURE

TO REMAIN

EX PROPERTY BOUNDARY

(TYP)

.0'

L R

EDGE OF ROADWAY

SEEDING

PR FES

SEE GRADING AND UTILITY PLAN

PR TYPE 13 AREA INLET

SEE GRADING AND UTILITY PLAN

GRAVEL TO MATCH EXISTING AFTER

GRADING/STORM DRAIN INSTALL

ASPHALT PATCHING

HATCH LEGEND:

SEEDING

GRAVEL

ASPHALT PATCHING

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SITE PLAN

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738b 35 810 RD.

35 810 RD.

738a 35 810 RD.

18" RCP SD

" R

S(2)

PR TYPE 13 AREA INLET

(SEE SHEET D-01)

STA 0+59.82

N=1478823.1669 E=2180682.0634

43 47

42 47

43 47

434744 47

1+04

-0+

1+00

EX DRIVEWAY

(APPROX.)

STA 0+05.90

OFF 0.00'

EX DRIVEWAY

(APPROX.)

STA 0+24.20

OFF 0.00'

S(1)

18" RCP END SECTION

STA 0+00.00

OFF 0.000

S(4)

12" RCP END SECTION

STA 0+00.00

OFF 0.000

S(3)

PR TYPE 13 AREA INLET

(SEE SHEET D-01)

STA 0+93.94

N=1478821.8916 E=2180647.9685

-0+

738A STORM DRAIN

12" HDPE SD

30" RCP SD

S(5)

60" DIA. SD STANDARD SHALLOW MH

SEE MESA COUNTY STANDARDS SD-05

STA. 1+28.29

30" RCP SD

EX PROPERTY BOUNDARY

(TYP)

30" RCP SD

S(6)

60" DIA. SD STANDARD SHALLOW MH WITH FLAPGATE

SEE MESA COUNTY STANDARDS SD-05

FLAPGATE DETAIL SEE SHEET D-01

STA. 2+31.63

N=1478620.7974 E=2180617.8456

EX 12" CMP

(ENDS TO BE FLOWFILLED)

NATURAL GAS CROSSING

STA 0+89.86'

WATER MAIN CROSSING

STA 0+90.46'

START ALIGNMENT

738A STORM DRAIN

STA -0+40.00

N=1478922.95 E=2180684.77

END ALIGNMENT

738A STORM DRAIN

STA 1+03.94

N=1478821.53 E=2180637.98

START ALIGNMENT

739 STORM DRAIN

STA -0+20.00

N=1478870.18 E=2180648.39

END ALIGNMENT

739 STORM DRAIN

STA 2+51.63

N=1478601.10 E=2180621.31

47424743

4744 4743

474347

54746

EX 12" PLASTIC PIPE

(TO BE FLOWFILLED)

EX UTILITY EASEMENT

EX ROW (TYP)

STA 0+93.94, 0.01' LT, 738A STORM DRAIN=

STA 0+28.29, 0.00' , 739 STORM DRAIN

NATURAL GAS CROSSING

STA 1+60.43'

WATER SERVICE CROSSING

STA 1+48.15'

UNDERGROUND ELECTRIC CROSSING

STA 2+13.15'

TIE INTO EXISTING STRUCTURE

(SEE STRUCTURE PENETRATION

DETAIL THIS SHEET)

STA 2+41.74

EX STRUCTURE AND

EX 60" RCP SD

(TO REMAIN)

EX CULVERT

TO BE REMOVED

(APPROX.)

STA 0+03.49

OFF 0.00'

EX 8" CMP

(TO BE FLOWFILLED)

TELECOM LINE CROSSING

STA 0+69.36'

7.7 5'

2.5 8'

20.0'

DRAINAGE EASMENT

20.0' 30.0'

50' PALISADE IRRIGATION

DISTRICT EASEMENT

TIV

.0'

L R

.0'

30.0' IRRIGATION

AND UTILITY

EASEMENT

-0+40 0+00 1+00 1+10

PG EX

.59

.79

EX PG

18" RCP SD59.82' @ S=2.27%

18" RCP SD

34.12' @ S=0.49%

EXISTING GRADE

S( 2)

.82

.00

0.5 7'

.57 ' (W

S( 3)

.29

.06

0.4 0'

0.9

0' (N

.40

' (S

24in PR FES

INV = 4741.92

FINISHED GRADE

100YR HGL

S=8.97%

EX NATURAL GAS MAIN CROSSING

(LOCATION APPROXIMATE)

STA = 0+89.86

T.O.P. = 4743.082'

EX TELECOM LINE CROSSING

TO BE FIELD ADJUSTED

STA = 0+69.36

T.O.P. = 4742.13

EX WATER MAIN CROSSING

TO BE LOWERED PER DETAIL F

STA = 0+90.46

T.O.P. = 4739.84

0.3 5'

-0+20 0+00 1+00 2+00 2+75

EXISTING GRADE

12in PR FES

INV = 4744.49

12" HDPE SD

28.29' @ S=12.68%

30" RCP SD

100.00' @ S=0.50% 30" RCP SD

103.34' @ S=0.50% 30" RCP SD

10.00' @ S=3.03%

S( 3)

.29

.06

0.4 0'

0.9

0' (N

.40

' (S

S( 5)

" D

. S

-05

.29

.85

8.9 0'

.90 ' (S

S( 6)

" D

. S

H W

ITH

-05

L S

D -02

.63

.74

8.3 8'

.38 ' (S

EX IRRIGATION STRUCTURE

PG EX

.58

PG EX

PG EX PG

FINISHED GRADE

EX 60" RCP

WATER SURFACE ELEVATION

(ELEVATION APPROX.)

ELEV = 4741.23

EX WATER SERVICE CROSSING

(LOCATION APPROX.)

STA = 1+48.15

EX NATURAL GAS CROOSING

(LOCATION APPROX.)

STA = 1+60.43

UNDERGROUND ELECTRIC CROSSING

(LOCATION APPROX.)

STA = 2+13.15

100YR HGL

NOTES:

1. THE EXISTING GAS MAIN SHOWN IN 35 & 8/10THS ROAD WAS

NOT FOUND DURING POTHOLE ACTIVITIES PERFORMED BY

BONAFIDE SURVEYING AND BADGER INC. ON 09/09/25.

SURVEY INFORMATION OBTAINED FROM THE COUNTY

INDICATES THAT A GAS MAIN IS PRESENT WITHIN THE

ROADWAY, AS SHOWN ON THIS PLANSET. ALL VERTICAL

DATA IS APPROXIMATE. THE CONTRACTOR SHALL USE

CAUTION WHEN PERFORMING EXCAVATION AND SHALL

FIELD VERIFY THE LOCATION AND DEPTH OF THE GAS MAIN

DURING CONSTRUCTION. THE CONTRACTOR SHALL

COORDINATE WITH THE UTILITY OWNER AS NECESSARY.

THE CONTRACTOR SHALL NOTIFY THE ENGINEER

IMMEDIATELY IF A CONFLICT WITH THE PROPOSED STORM

DRAIN IS FOUND.

2. BACKFILL AROUND MANHOLES, INLET BOXES, AND OTHER

STRUCTURES SHALL BE PLACED IN 8" LIFTS AND

COMPACTED TO 95% AASHTO T-180

3. ALL PORTLAND CEMENT CONCRETE SHALL BE COLORADO

DEPARTMENT OF TRANSPORTATION CLASS "B". (SECTION

601.2)

4. ALL NON-SHRINK GROUT SHALL BE COLORADO

DEPARTMENT OF TRANSPORTATION APPROVED. (SECTION

412.22).

5. ANY EXISTING PAVEMENT NOT DESIGNATED FOR REMOVAL

WHICH IS DAMAGED BY CONSTRUCTION SHALL BE

REPLACED IN-KIND AT THE CONTRACTOR'S EXPENSE.

6. ALL CONCRETE WORK WITHIN PUBLIC RIGHT-OF-WAY

SHALL BE PERFORMED BY A LICENSED COUNTY

CONTRACTOR.

7. MANHOLE RING AND COVER AND INLET GRATE AND FRAME

SHALL BE ADJUSTED TO FINISHED GRADE USING

NON-SHRINK GROUT AND PRE-CAST CONCRETE GRADE

RINGS OR WITH THE "WHIRLY GIG" METHOD. GROUT

THICKNESS SHALL NOT EXCEED 2 INCHES.

8. ALL WORK SHALL BE IN ACCORDANCE WITH APPROVED

PLANS, STANDARD STORM DRAIN DETAILS AND THE MESA

COUNTY STANDARD SPECIFICATIONS FOR CONSTRUCTION.

9. STORM DRAIN INLET BOXES MAY BE MADE FROM

STACKABLE PRECAST BOX SECTIONS WITH TONGUE AND

GROOVE JOINTS AND FLEXIBLE SEALANT BETWEEN

SECTIONS. THE TOP SECTION OF THE INLET BOX SHALL

HAVE A GROOVE-LESS FLAT SURFACE TO SUPPORT THE

INLET FRAME AND GRATE.

G-06 6 9

1"=20'

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GRADING AND STORM DRAIN PLAN

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739 35 810 RD.

738b 35 810 RD.

35 810 RD.

738a 35 810 RD.

PRICE DITCH RD.

738A STORM DRAIN PROFILE 739 STORM DRAIN PROFILE

LEGEND

EX NATURAL GAS

EX WATER LINE

EX UNDERGROUND ELECTRIC

EX OVERHEAD ELECTRIC

EX STORM DRAIN

PR STORM DRAIN

EX PROPERTY BOUNDARY/ROW

EX EASEMENT

60" RCP

(TO REMAIN)

60" RCP

(TO REMAIN)

#5 HOOP

3" CLEAR FROM

RCP O.D.

2" DEEP SAW CUT

6" FROM RCP O.D.

CUT EXISTING REINF.

2" CLEAR FROM RCP O.D.

MANUALLY REMOVE CONC. WALL

WITHIN SAW CUT AREA

PRESERVE EXISTING REINF.

12" MIN. THICK GROUT (NON-SHRINK

CDOT APPROVED SECTION 412.22)

COLLAR AROUND PIPE PENETRATION VOID

STRUCTURE PENETRATION DETAIL

N.T.S.

10.33'

0.5'

(TYP.)

7.75'

FLOW

EX IRRIGATION

STRUCTURE

2.58'

EX IRRIGATION

475047

474247 434744

474647

54475547

604761

G-07

1"=20'

20 10 0 20

EXISTING DRAINAGE PLAN

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LEGEND

0.58 0.68

0.81

BASIN NAME

AREA IN ACRES

10 YEAR RUNOFF

COEFFICIENT

100 YEAR RUNOFF

COEFFICIENT

A DESIGN POINT

FLOW PATH

EXISTING CONTOUR

PROPOSED CONTOUR

SUB-BASIN BOUNDARY

OS-2

3.00 0.20

0.52

0.19 0.48

0.68

OS-1

0.61 0.18

0.51

1.31 0.46

0.67

OS-3

0.75 0.52

0.701

0.49 0.32

0.59

0.25 0.46

0.66

2 5

0.06 0.52

0.70

Existing Basin Summary Table

Sub-Basin Area (ac) % Impervious Q2 (cfs) Q10 (cfs) Q100 (cfs

1 0.49 26.16% 0.10 0.32 1.05 2 0.25 44.15% 0.13 0.31 0.81 3 1.31 44.89% 0.43 1.05 2.72 4 0.06 53.20% 0.04 0.09 0.21 5 0.19 46.70% 0.10 0.25 0.64

OS-1 0.61 7.00% 0.02 0.17 0.86

OS-2 3.00 8.80% 0.12 0.77 3.63

OS-3 0.75 53.20% 0.31 0.71 1.70

Total Site 6.66 24.80% 1.25 3.67 11.62

Existing Design Points Summary Table EX Design Pts Tributary Design Point Q2 (cfs) Q10 (cfs) Q100 (cfs)

1 1 0.10 0.32 1.05 2 1,2,3,4 0.70 1.77 4.79 3 3 0.43 1.05 2.72 4 3,4 0.47 1.14 2.93 5 1,2,3,4,5 0.80 2.02 5.43

EX IRRIGATION

G-08

1"=20'

20 10 0 20

PROPOSED DRAINAGE PLAN

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LEGEND

0.58 0.68

0.81

BASIN NAME

AREA IN ACRES

10 YEAR RUNOFF

COEFFICIENT

100 YEAR RUNOFF

COEFFICIENT

A DESIGN POINT

FLOW PATH

EXISTING CONTOUR

PROPOSED CONTOUR

SUB-BASIN BOUNDARY

OS-2

3.00 0.20

0.52

0.19 0.48

0.68

OS-1

0.61 0.18

0.51

1.31 0.46

0.67

OS-3

0.75 0.52

0.70

0.49 0.32 0.59

0.06 0.52

0.70

0.22 0.46

0.66

0.03 .46

.66

Proposed Basin Summary Table

Sub-Basin Area (ac) % Impervious Q2 (cfs) Q10 (cfs) Q100 (cfs

1 0.49 26.16% 0.10 0.32 1.05 2a 0.22 44.15% 0.11 0.27 0.71 2b 0.03 44.15% 0.02 0.04 0.10 3 1.31 44.89% 0.43 1.05 2.72 4 0.06 53.20% 0.04 0.09 0.21 5 0.19 46.70% 0.10 0.25 0.64

OS-1 0.61 7.00% 0.02 0.17 0.86

OS-2 3.00 8.80% 0.12 0.77 3.63

OS-3 0.75 53.20% 0.31 0.71 1.70

Total Site 6.66 24.80% 1.25 3.67 11.62

Proposed Design Points Summary Table EX Design Pts Tributary Design Point Q2 (cfs) Q10 (cfs) Q100 (cfs)

1 1 0.10 0.32 1.05 2a 1,2a 0.21 0.59 1.76 2b 1,2a,2b,3,4 0.70 1.77 4.79 3 3 0.43 1.05 2.72 4 3,4 0.47 1.14 2.93 5 1,2a,2b,3,4,5 0.80 2.02 5.43

October 21, 2025

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D-01 9 9

DETAILS

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30" RCP

60" STANDARD SHALLOW

MANHOLE WALL

FLAPGATE

REFER TO TABLE

FOR BOLT SPACING FLAPGATE CONNECTION

NTS

NOTES:

1. FLAP GATE SHALL BE PAID FOR AS SUCH AND MEASURED AS EACH

2. THE CONTRACTOR SHALL INSTALL THE FLAP GATE PER THE MANUFACTURER'S

RECOMMENDATIONS

3. FRESNO 30 INCH VALVE OR APPROVED EQUAL SHALL BE USED, CONTRACTOR SHALL PROVIDE

THE COUNTY A MATERIAL SUBMITTAL FOR FLAP GATE APPROVAL PRIOR TO INSTALLATION

4. ITEMS AND EFFORTS ANCILLARY TO INSTALLATION OF FLAP GATE INCLUDING BUT NOT LIMITED

TO LABOR AND MATERIALS NEEDED FOR INSTALLATION SHALL BE INCIDENTAL TO THE FLAP

GATE AND WILL NOT BE MEASURED AND PAID FOR SEPARATELY

File details come from the government source that posted it. Updated Oct 30, 2025.