City of San Bruno City Council Meetings 2020, 10 Nov 2020

Previous Meeting Next Meeting

⏯

youtube image

►

From YouTube: San Bruno City Council Meeting November 10, 2020 7b. Stormwater Pipeline Replacement Project

Description

San Bruno City Council Meeting November 10, 2020
7b. Stormwater Pipeline Replacement Project

A

uh Item b, please.

B

Item seven b adopt resolution authorizing the city manager to execute a memorandum of agreement with the san francisco public utilities, commission for the stormwater pipeline replacement project and appropriating four hundred and fifty thousand dollars from the general fund. Capital reserve fund.

A

Director can, I believe, you're up.

C

I'm up again, yes, thank you uh good evening, honorable mayor members of the city council, I also have a brief presentation on this item as well. This item is regards to the storm drain pipeline replacement project in the city.

C

The objective is to adopt the resolution authorizing city managers to execute a memorandum of agreement with san francisco public utilities, commission for the stormwater pipeline replacement project on appropriating 450 000 from the general fund capital reserve fund at the agenda is as follows: I'll provide a brief background on the project, uh discuss the scope of work, then the physical impact and alternatives.

C

And, lastly, um you know sorry and then lastly, alternatives so a little bit on the background. The san francisco public utilities, commission, otherwise known as sf puc, operates. Portable water distribution network in san mateo county and two of those pipelines are named san andreas pipelines number two and three, which is located in an easement near san mateo county's park property in cebu.

C

This project consists of replacing segments of the senators pipeline number two, which is, which is about 6 500 feet of pipelines that they're replacing in san bruno near and also near the uh junipero cereal park park as well, and earlier this year, the srpc's contractor ranger pipelines discovered the deteriorate, structuring pipeline um and erosion as they were in the process of constructing their the pipeline through their easements near crystal springs, road and and the park area.

C

This storm drain pipeline connects to the drain inlet and which can which collect storm water from the the roadway along christopher's, road and discharges. You know the flows into the creek, the city and sfpc. You know we've been having discussions about the storm drain issue and to expedite the work uh staff is recommended to enter into a memo random of agreement with us, a pc, so that contractor could assist in replacing existing storage pipeline and resolve the erosion issue, since it will be the most. uh You know quickly.

C

The quick approach that we may have here.

C

uh The slide shows the project location of the storm during pipeline. uh As mentioned, the surgery product collects the water from the crystal strings road and, as shown there um and into a drain inlet and then conveys water to the pipeline across the sfpc easement, which are shown in in yellow there and then discharge it instead of creek, the existing pipeline material is corrugated metal pipeline and um here's some photos and pictures of the um of the area in the pipeline.

C

The upper left picture was taken in january uh during the um on the storm event, which shows water coming out from various locations and from the pipeline and the area near the above. You know the black um screen divider there is where the sp as a pc easement is located.

C

uh The picture on the bottom shows the gully here, uh or the erosion area of the um the hillside and again that's a poc pipeline is located just above the uh the goalie area and there's a video that I want to share with you about all the water coming down the uh the hillside here, hopefully,.

C

Okay, so the scope of work uh for this project is to um first, you know, design the stronger replacement pipeline, so sfpc requested their engineer to perform the design and determine the pipeline diameter necessary to convey the flow ranger pipelines will be used to assist the in the replacement of the pipeline and they're under contract with us at pc and recently completed the installation of the uh you know, their um sopc pipelines within the easement area, where the deteriorated storm drain pipeline is located and it's familiar with the hillside terrain conditions so that you know they can easily change.

C

Sfps can easily uh request a range of pipelines to perform the work by through a change order, uh request. uh The project will remove and and uh existing the corrugated metal pipeline, replace it with the plastic storm drain pipeline to prevent future erosion. The pipeline diameter to be installed is 12 inches.

C

The alignment is being relocated as well to ease the construction work and then, lastly, the hillside will need to be as stabilized as well.

C

uh Here's a design drawing of the improvement. um I know don't worry, to kind of look at too many um lines uh on here, but just focus on a couple of lines on here: the yellow line and then the black line. So the existing storm drain line is shown, you know as yellow and then the new storm drain line is shown as the uh the dark of the black line there. So, as you can see the black line, the alignment shown in black is being re-routed.

C

um That's where the new pipeline is proposed to be installed and the determination point of the since you know having to go back in an existing alignment is not a feasible option, since the termination point is about 30 feet to the bottom of the uh the goalie there. So.

C

So, as for the physical impact, the estimated construction cost is about 400 000 and its cost includes you know, design serving. uh You know: environmental monitoring, pipeline construction, using wind, ranger pipelines, um clearing grubbing, no final, grading with hydro seeding placement of erosion, blankets and straw waters, and some minor, concrete work. uh Staff is also requesting a contingency of about fifty thousand dollars for any unfortunate uh issues that may arise uh during construction activities.

C

For a total budget of four hundred fifty thousand dollars. uh The recommended funding source will be the uh the general fund capital reserve fund, and there is currently a balance of 4.7 million dollars in the fund.

C

So the annual revenue for the storm water fund, you know is from you know the special assessment on the property uh which is paid through the um property tax, roll and most residential properties pay approximately 46 dollars per year. But you know this: this fund is, you know, projected to um have an ending balance in fiscal year. 2021 20 20 21, with a balance of 112 000, and um you know the revenue is inadequate. You know to support both the operating budget and stormwater capital needs.

C

um Therefore, you know the storm, even though the stormbreak master plan completed in 2014 included recommendations to improve the storm system with an estimated cost of 20 million dollars. You know the city hasn't been able to proceed with any of the recommended projects.

C

So to supplement the broad budget you know, city has been using general fund capital reserve fund um to pay for storm capital improvements projects in the current and prior years. Harvard is you know, a sustainable. You know in the long run, um the stormwater fund is also forecasted to be in the negative starting from you know, fiscal year, 21, 22 and onwards.

C

So currently, staff is in the process of completing an engineering study to determine the revenues needed for the stormwater fund. The overall goal is to determine the appropriate stormwater assessment needed to stabilize the stormwater fund and to cover any annual operating and capital expenses.

C

This engineering study is still ongoing and um my staff anticipates to bring the item to council with a recommendation in january of next year. You know, if proved by council, the proposition 218 process will likely occur sometime. You know from march to may 2021.

C

As for the alternatives, you know there are two, you know: don't you know complete the project. The future storm events will continue to road, the hillside, which will impact both the san francisco pipelines and the crystal springs road um or the direct staff to hire an city contractor to complete the work which would delay the construction activities and the costs may be higher than radio pipelines.

C

And this concludes my presentation I'll be happy to answer any questions.

A

Thank you, director, uh tan for your report and presentation. Thank you. um Questions from colleagues, council, member davis.

D

uh Thank you jimmy chan, another good report from you. This is an unfortunate situation and um I think in some ways we can be grateful for the work that's already being done out there and I'm sure that there's a savings in that cost um for the contract.

D

That's already out there doing that work, and so that's that's a good thing, um but I think the slide that you presented, where you know we're only looking at 46 a year per per resident for storm drain is just really insufficient, and- and so I really look forward to what the council can do with the study session for next year.

D

um Does the 450 000 cost also include, I mean in great by the way great video is you know nothing better than really getting the live footage of what actually is happening out there, but is there also um costs included to you know not only fix the pipeline, but the area that's kind of been destroyed by the water runoff.

D

You know, there's a cleanup mess and sort of leaving nature back to the beauty that it is.

C

Yeah, that's correct, uh so you know there's a lot of areas that will be um hydro seeded as part of this work. In addition to that, you know what the goalie is. You know that's been created by this erosion, but you know the cost will include you know providing some sort of a rip-rap. um uh You know um uh installation in that area to to um to prevent further erosion. You know into the um you know the hillside.

D

That's probably where a big part of your cost is is in that hillside, though that's correct, yeah all right. Well, thank you so much. I appreciate it. Thank you.

A

Okay, not seeing any more uh hands up council member medina.

E

Yes, uh thank you for the report uh director tan. It's it's it's another one of those um unforeseen costs and having an old city. um It seems like almost every year we we run into one of the one of these. um So a couple questions.

E

The does this project include of the costs include obtaining easements for the for the pipe, that's being relocated.

C

uh It doesn't actually, you know, I know some of the areas is within the san mateo county lands, uh the parks lands. So you know um there hasn't been any discussions with the county to obtain an easement for our um storm drain pipeline and there wasn't an easement for the existing storm drain pipeline as well, so yeah yeah.

C

We would definitely be in discussion with the county to figure out a way for the city to maintain the pipeline. You know for the in the future.

E

Right so we have uh 200 feet of new pipe. um Is there an estimate of how big of that area from that um is? Is it getting be going to also be backfilled or is just going to be rip-rapped and some geotechnical person uh designed that for that repair and restoration.

C

Council, member medina, are you referring to the goalie there that area or are you talking about the installation of the pipeline where.

E

Where they were the damage, uh what needs to be stabilized and, of course, at the outfall, there has to be some kind of structure to put in place to slow down the water, so it dissipates across the field, but um just curious on on those costs and 12 inch pipe and it's going to be underground or is it? How are you guys going to how what's that design entail.

C

Yeah, so the pipeline will be buried. It's very shallow. There's no traffic loading um within the area, so it's buried about you know about a foot below grade to the top of the pipeline. So at the termination point you know of the pipeline, there will be some like a t, energy and then there'll be some rocks on either side of it to slowly. Allow the water to trickle down into the um you know the creek for the goalie area for the mitigation efforts that will be designed by an engineer.

E

Okay, yeah um and as for um council member davis's comments it it's it's one of those things that um these costs for future stormwater improvements. um I don't I'm scared to recall that the is it in the tens of millions, if not hundreds of millions, a hundred million dollars for the storm.

E

I think we might have talked about it a little bit during budget just how much work needs to be done in our storm drain system.

C

Yeah, so the 2014 master plan indicated about 20 million dollars in improvements um in which we haven't. You know done any um of the work, because just just really no funding for us to um to do to repair any or to replace or increase the capacity of any of our storm systems.

E

Got it and and that's separate from the storm drain, um I'm sorry the the plan that we recently approved for the additional mitigation of stormwater treatment.

E

There was I'm sorry, I I don't recall the exact term, but what, with all these additional stormwater um treatment standards, I think was earlier this year we went over that planet of all the things we were talking about needing to do with that as well. Does that ring a bell.

D

Capture systems and stuff.

E

Yeah all that stuff.

C

Yeah, so you know so we are. The trash capture system is a requirement by the regional board, um and then I know also you know this. All the various of these various agencies are also being requested by the regional board to install you know, green infrastructure, right, exactly yeah, and so there's there's a lot of different requirements coming down by the you know.

C

The state private cities to try to you know prevent pollution to know from entering the uh you know the bay, uh and so with that yeah I know all the agencies are in the same, similar, very similar situation. That's right! That's the reason why doing regional regional projects that we were looking into you know at the I 280 i3 ada we created would help um a lot more so that could reduce.

C

You know the percentages that we're required to do as part of the gi projects, um but right now I think um yeah we don't even have funding to do any of the gi projects and there are grant availables uh out there that we may be able to apply for if we, um but you know, we have to find locations and we have to maintain those too. uh You know we just can't construct it and ignore those gi's. Okay,.

E

Like so, basically just another example of how these mandated projects put these additional costs on the city, which we have no revenue streams for, and so we're currently having to take money out of the general general fund and and this capital reserve in order to pay for these, for these repairs and uh eventual improvements. So it's something that no council member wants to to talk about, having to increase fees or taxes or anything, especially during all the after everything, the city. The cities have been going through so, um um but we have to.

E

We have to address it and- and there are consequences for for failing to address it. So um um thank you for your work. Thank you.

A

Okay, not seeing any more hands uh raised. uh This is an action item. It's a resolution. Any action from council.

D

Motion to approve.

A

Second motion and second to approve uh roll call. Please.

B

Council member davis, aye council member mason, aye council member medina.

E

B

Vice mayor salazar,.

E

B

E

B

A