what is a grading & drainage plan? the purpose of a "grading & drainage plan" is...

What is a Grading & Drainage Plan?

• The purpose of a "GRADING & DRAINAGE PLAN" is to direct the movement of the soil and water; thus protecting infrastructure from flooding while accommodating ADA requirements.

The “Hydro-illogical” Cycle

FLOOD

PANIC

PLAN

PROCRASTINATION

Why Grading and Drainage Engineering?

• Natural flooding is documented for City of Rio Rancho……Floods of 2006 most recent

• Protect human life, housing, utilities, infrastructure and large-scale economic development

• Recommended drainage infrastructure designed to convey up to and including 100 year storm – 2.90 inches in 24 hours

Why do we need them?

• Required by City of Rio Rancho Ordinances and Policies

• Required by SSCAFCA Regulations and Policies

• City of Rio Rancho DPM - Chapter II.2 Drainage, Flood Control and Erosion Control

• Grading and Drainage Plan Checklist – 2.2-248 of CORR DPM

City of Rio Rancho Design Process Manual

• I. GENERAL INFORMATION:1. Professional Engineer's stamp with signature and date.2. Drafting Standards: (Reference City of Rio Rancho Standards)

A. North ArrowB. Scales - recommended engineer scales:(1) 1" = 20' for sites less than 5 acres(2) 1" = 50' for sites 5 acres or moreC. Legend - see City of Rio Rancho D.P.M. Manual, Volume 2, for recommended

standard symbolsD. Plan drawings size: 24" x 36"E. Notes defining property line, asphalt paving, sidewalks, planting areas, ponding

areas, project limits, and all other areas whose definition would increase clarity3. Vicinity Map4. Benchmark - location, description and elevation

A. Control survey vertical datumB. Permanently marked temporary benchmark located on or very near site

5. Flood Insurance Rate Map (FIRM)6. Legal Description

Why do we need them?

• City of Rio Rancho DPM - Chapter II.2 Drainage, Flood Control and Erosion Control

• Grading and Drainage Plan Checklist – 2.2-248 of CORR DPM

Example Grading & Drainage Plans

• Large Commercial Grading and Drainage Plan >5 Acres

• May Require Separate Drainage Report

Example Grading & Drainage Plans

• Small Commercial Grading and Drainage Plan >5 Acres

Example Grading & Drainage Plans

• Single Family Residence (SFR) Grading and Drainage Plan

Erosion Control

• Erosion Control is a must.

• A Plan will prevent

Erosion Control

• Large Commercial Erosion Control.

What do they Cost?

• Cost for a Grading & Drainage (G&D) Plan vary and is based on project size, complexity, and location.– Typical Single Family Residential (SFR)

G&D may range from $1,500 to $3,500– Typical Commercial Development < 5

Acres may range from $5,000 to $12,000– Typical Commercial Development >5

Acres may range from $8,000 to $25,000

Questions ?

Thank you, if you have any future questions or assistance you may contact us.

Steve Salazar, PE: 505-898-8021Mario Juarez-Infante, PE: 505-348-4070