WIP CIP ASAP

Anne Arundel County’s

Watershed Cure Strategy

July 16, 2013

Presented by: Anne Arundel County Department of Public Works

Chris Phipps, Acting Director

1952 2012

Linthicum/Ferndale I-695 and I-97

3 3 3 3 3 3

Chesapeake Bay TMDL Watershed Implementation Plan (2025)

Compliance Costs

Watershed Implementation Plan

Average Annual

Compliance Costs

Total Estimated Compliance Costs

(2014-2025)

Stream and Wetland Restoration $27,910,000 $334,954,000

Stormwater Pond Retrofits $ 6,880,000 $ 82,614,000

Stormwater Outfall Rehabilitation $32,210,000 $386,533,000

Other Related Projects $ 3,280,000 $ 39,360,000

Stormwater Infrastructure Maintenance

$ 6,970,000 $ 51,400,000

$77,250,000 $894,861,000

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Implementation Strategy Project Development

• Priority Subwatersheds • Projects Bundled by Type

– Pond Retrofits » Public » Private

– Storm Drain Outfalls – Stream Restoration – Infrastructure Rehab.

• Bundle Groups by: – Subwatersheds – Hydraulic connectivity to

stream network

• Project Values between $3M and $7M

• 91 Projects over 6-year Program – 314 Ponds – 873 Outfalls – 124,000 Streams (Linear

Feet)

5

Implementation Strategy Project Phasing

• Ponds Retrofits – Less design, permitting, right-of-way – More immediate construction – Design-Build Contracting – Blanket-Order Construction Contracting

• Outfall Stabilization – Moderate design, permitting, right-of-way – Moderate construction phasing – Design-Permit-Build Contracting

• Stream Restoration – Long lead time for design, permitting, right-of-

way – Out year construction phasing – Design/Bid/Build Contracting

Project B002214 : PT – OF – 04

Patapsco Tidal - Outfalls

TN TP TSS LF

Project B002114 : PT – PC – 01

Patapsco Tidal – Public Ponds

TN TP TSS LF

Project B001614 : PT – ST – 01

Patapsco Tidal - Streams

TN TP TSS LF

Mill

ions

of D

olla

rs

Overhead Construction Land / ROW Design

0.5 0.9 0.6

0.5

Appropriation by Project Phase Six Year Capital Improvement Program

Appropriation by Project Type Six Year Capital Improvement Program

Mill

ions

of D

olla

rs

Streams Outfalls Pond Retrofits Culverts / SD

.5

.3

Total Nitrogen (TN) Stormwater Pollution Reduction Summary

Required TN Reduction 207,742 lbs

Total Nitrogen Reduction (lbs)

Total Nitrogen Baseline (lbs) = 657,383 lbs Total Nitrogen Limit (lbs) = 449,641 lbs

Required Nitrogen Reduction (lbs) = 207,742 lbs

CIP Program Projected

Annu

al P

ound

s of R

educ

tion

FY14-FY19 Cumulative TN Reduction 64,939lbs

Annu

al P

ound

s of R

educ

tion

Stormwater Pollution Reduction Summary

Total Phosphorus Baseline (lbs) = 56,531 lbs Total Phosphorus Limit (lbs) = 30,147 lbs

Required Phosphorus Reduction (lbs) = 26,385 lbs

CIP Program Projected

Required TP Reduction 26,384 lbs

Total Phosphorus (TP) & Total Suspended Solids (TSS)

Total Suspended Solids Reduction (Tons)

Total Phosphorus Reduction (lbs)

FY14-FY19 Cumulative TSS Reduction 12,731 T

FY14-FY19 Cumulative TP Reduction 14,415 lbs

Culvert Repair (Before)

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Culvert Repair (After)

Riva 400 – Before Construction Looking upstream at pipe

Outfall Stabilization (Before)

Riva 400 – Before Construction At the pipe outfall looking downstream

Outfall Stabilization (Before)

Riva 400 – After Construction Looking upstream toward Riva Rd.

Outfall Stabilization (After)

Central Sanitation Facility - Before Restoration

Stream Restoration (Before)

Central Sanitation Facility - After Restoration

Stream Restoration (After)

Central Sanitation Facility– After Restoration

Stream Restoration (After)